KR101959011B1 - Brake system and braking method for working machine - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a brake system and a braking method for a work machine, and a brake system of a working machine of the present invention includes a brake detection unit for detecting a depression of a brake pedal and outputting a brake signal; A running state detecting unit for detecting a forward, backward, or stop state of the work machine and outputting a running state signal; And controlling the operation of a corresponding proportional control valve in a closed state among a forward proportional control valve or a backward proportional control valve of a hydraulic drive source according to a result of a comparison between the traveling state signal and the brake signal, A brake valve which is operated by the operation of the brake pedal, and a control unit which is supplied with pressurized oil from the reverse clutch to the corresponding clutch connected to the corresponding proportional control valve so that braking of the working machine is realized; And an axle braking portion mounted on an axle of the working machine and operated or released according to whether or not the pressurized oil is supplied through the brake valve, wherein the brake valve is operated by operation of the brake pedal, The brake fluid pressure is supplied to the braking unit of the braking unit so that the braking of the working machine in the forward or backward direction is realized by pressing the axle, and the axle braking unit is operated simultaneously or sequentially with the brake braking unit.
The braking system and the braking method of the working machine according to the present invention are constructed so that the braking of the working machine can be performed by the axle braking method and the clutch braking method so that the braking force of the working machine can be dispersed in the clutch without being concentrated on the axle, The number of existing friction plates used in the axle braking method can be reduced and the load of the axle due to friction during braking can be relieved to increase the life of the axle and the life of the internal parts of the axle and the existing cooling system can be eliminated Or the specification can be reduced, and the cost of the working machine can be reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a brake system and a braking method,

The present invention relates to a brake system and a braking method of a working machine.

Due to the diversity of work to be done in the industrial field, the working machine can be divided into excavation equipment, loading equipment, conveying equipment, loading equipment, compaction equipment, foundation equipment, etc. Specifically, It is a concept that includes equipment of the kind.

In general, a forklift, a working machine, is a device for lifting or lowering a relatively heavy load or transporting the load in a limited working environment to a desired position.

These forklifts are divided into engine forklifts and electric forklifts. Engine forklift trucks are widely used in the outdoor area, while electric forklift trucks are often used in the indoor area due to low smoke and noise.

In addition, the forklift is classified into a standard forklift, in which the mast assembly is fixed to the vehicle body, and a reach type forklift, in which the mast assembly moves back and forth with respect to the vehicle body along the rich lag. The engine type is equipped with an engine, and the electric type and the rich type forklift are so-called electric forklifts equipped with an electric motor and a battery for supplying electric power thereto.

Electric forklifts and HST (Hydro-static Travel) engine forklifts have auto deceleration, and HDT (Hydro-dynamic Travel) engine forklifts do not have auto deceleration function.

An HDT engine forklift truck without an automatic deceleration function increases the speed of the engine by adjusting the number of revolutions of the engine in accordance with the degree of operation of the accelerator pedal. In order to stop the driving and stop the vehicle, So that the third deceleration is stopped and stopped.

However, such a deceleration deceleration is so small that the driver can quickly stop the forklift by operating the brake pedal, or if an additional device such as a service brake or a retarder is provided, the forklift can be rapidly .

However, the braking method using a brake pedal or a service brake or retarder is a method of braking by generating frictional force or frictional force by a friction plate installed on an axle connected to a driving wheel. When frequent braking is performed, the braking force is decreased due to overheating of the friction plate There is a possibility of failure due to the additional device, and there is a problem in operation and maintenance of the forklift, and the friction with the friction plate shortens the service life of the axle and the life of the internal parts of the axle.

Korean Patent Publication No. 10-2007-0068945 (published on July 2, 2007) Korean Patent Laid-Open Publication No. 10-2010-0075288 (published on July 02, 2010)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to provide a braking device for braking a work machine using an axle braking system and a clutch braking system, It is possible to reduce the number of components and reduce the load of the axle due to friction during braking, thereby increasing the service life of the axle and the life of the internal parts of the axle, and reducing the heat generation, And to provide a brake system and a braking method for a working machine that can reduce the cost of the working machine.

It is also an object of the present invention to provide a clutch braking system in an axle braking system to enable a driver to arbitrarily adjust a deceleration degree for braking or to allow a driver to select a degree of deceleration, And to provide a braking system and a braking method of a work machine capable of improving the braking stability of a working machine as well as enabling a proper personal deceleration.

According to an aspect of the present invention, there is provided a brake system for a work machine including: a brake sensing unit for sensing a depression of a brake pedal and outputting a brake signal; A running state detecting unit for detecting a forward, backward, or stop state of the work machine and outputting a running state signal; And controlling the operation of a corresponding proportional control valve in a closed state among a forward proportional control valve or a backward proportional control valve of a hydraulic drive source according to a result of a comparison between the traveling state signal and the brake signal, And a controller for supplying pressurized oil to the clutch connected to the proportional control valve among the reverse clutch so that braking of the working machine is realized.

Specifically, the brake sensing unit may include a pressure sensor or an angle sensor, and may include a sensing device that senses the operation of the brake pedal.

Specifically, the running state signal is a forward signal, and the control unit controls the rearward proportional control valve connected to the rearward clutch to be operated from the closed state to the open state, so that the backward force, which is increased by the reverse clutch, The decelerating function for braking in the forward direction of the working machine can be implemented in the clutch braking portion because it conflicts with the forward force by the forward clutch.

Specifically, the running state signal is a reverse signal, and the control unit controls the forward proportional control valve connected to the forward clutch to be operated from the closed state to the open state, so that the forward force, which is increased by the forward clutch, The decelerating function for braking in the backward direction of the working machine can be realized in the clutch braking portion because it conflicts with the backward force by the reverse clutch.

Specifically, a brake valve operated by operation of the brake pedal; And an axle braking portion installed on an axle of the working machine and operated or released according to whether or not the pressure oil is supplied through the brake valve.

Specifically, the running state signal is a forward signal or a backward signal, and the brake valve is operated by the operation of the brake pedal to supply the hydraulic oil to the brake unit of the axle braking unit to press the axle, Forward or reverse direction braking can be implemented.

Specifically, a brake valve operated by the control unit; And an axle braking portion installed on an axle of the working machine and operated or released according to whether or not the pressure oil is supplied through the brake valve.

Specifically, the running state signal is a forward signal or a backward signal, and the control unit controls the brake valve to operate so that pressure oil is supplied to the brake unit of the axle braking unit to compress the axle, Forward or reverse direction braking can be implemented.

Specifically, the axle braking section may be operated simultaneously or sequentially with the clutch braking section.

More specifically, the control unit may further include a braking selection unit for outputting a braking selection signal to the control unit so that at least one of the clutch braking unit and the axle braking unit is selectively operated by the driver's operation.

Specifically, the braking selection signal is a clutch braking signal, and the control unit controls the forward-proportional control valve of the hydraulic drive source or the reverse-direction control valve of the hydraulic drive source according to the comparison result of the clutch braking signal, The operation of the corresponding proportional control valve in a closed state among the proportional control valves is controlled so that pressurized oil is supplied to the corresponding clutch from the forward clutch or the reverse clutch of the clutch braking portion to the corresponding proportional control valve, Thereby realizing the braking of the vehicle.

Specifically, the braking selection signal is an axle braking signal, and the control unit controls the brake valve to operate so that pressure oil is supplied to the brake unit of the axle braking unit to press the axle, Backward braking can be realized.

Specifically, the braking selection signal is a clutch braking signal and an axle braking signal, and when the both of the clutch braking signal and the axle braking signal are inputted or not inputted, the control unit stops the clutch braking signal and the axle braking signal, So that the braking of the working machine can be realized.

According to another aspect of the present invention, there is provided a braking method for a work machine, comprising: a control unit receiving a running state signal from a running state detecting unit; The control unit receiving a brake signal from the brake sensing unit; And the control unit controls the operation of the proportional control valve in the closed state among the forward proportional control valve or the reverse proportional control valve of the hydraulic drive source according to the result of comparing and analyzing the running state signal and the brake signal, And the pressure oil is supplied to the corresponding clutch connected to the proportional control valve among the forward clutch and the reverse clutch of the automatic transmission, so that the braking of the working machine is realized.

Specifically, after the step of inputting the running state signal from the running state sensing unit, pressure oil is supplied to the brake unit of the axle braking unit by the operation of the brake valve while the brake pedal is pressed, thereby realizing braking of the working machine As shown in FIG.

Specifically, after receiving the running state signal and the brake signal, the control unit controls the operation of the brake valve according to a result of the comparison between the running state signal and the brake signal, And the brake fluid is supplied to the brake unit to implement braking of the working machine.

Specifically, the step of implementing the braking of the working machine in the axle braking part may be performed simultaneously or sequentially with the step of implementing the braking of the working machine in the clutch braking part.

Specifically, before the step of receiving the brake signal, the control unit may further include a step of receiving the brake selection signal from the brake selection unit.

Specifically, the braking selection signal includes a clutch braking signal for selecting, in the clutch braking section, a deceleration function for braking the working machine to be implemented; And an axle braking signal for selecting the braking of the work machine to be implemented in the axle braking section.

Specifically, when the control unit receives the clutch braking signal, the control unit controls the clutch braking unit to implement a deceleration function for braking the working machine. When the control unit receives the axle braking signal, Wherein the control unit controls the braking of the working machine in the axle braking unit so that the braking of the working machine is performed by the clutch braking unit and the axle braking unit when the control unit does not receive or receive the clutch braking signal and the axle braking signal, Can be implemented.

The braking system and the braking method of the working machine according to the present invention are constructed so that the braking of the working machine can be performed by the axle braking method and the clutch braking method so that the braking force of the working machine can be dispersed in the clutch without being concentrated on the axle, The number of existing friction plates used in the axle braking method can be reduced and the load of the axle due to friction during braking can be relieved to increase the life of the axle and the life of the internal parts of the axle and the existing cooling system can be eliminated Or the specification can be reduced, and the cost of the working machine can be reduced.

Further, the brake system and the braking method of the working machine according to the present invention are configured so that at least one of the clutch braking system and the axle braking system can be selected, so that the driver can select the degree of deceleration, With the customized braking according to the quality, it is possible to eliminate the uncomfortable feeling that the driver feels in the braking process of the working machine and secure the safe operation of the working machine.

Further, the brake system and the braking method of the working machine according to the present invention are constructed so that the braking of the working machine can be performed by the clutch braking system using the hydraulic transmission, so that the existing brake system (axle braking system) It is possible to extend the service life of the axle, to reduce the cost due to the maintenance or replacement of the axle, and to provide the axle with a cooling system It is possible to gain competitive advantage with other companies by reducing the manufacturing cost of the work machine.

Further, the brake system and the braking method of the working machine according to the present invention are configured such that the braking of the working machine can be performed while the amount of the pressure oil outputted from the forward or backward proportional control valve of the hydraulic drive source is controlled according to the amount of the brake signal , The magnitude of the deceleration for braking can be linearly adjusted, the driver can arbitrarily adjust the degree of deceleration, and the braking stability of the working machine can be improved.

1 is a block diagram illustrating a brake system of a work machine according to a first embodiment of the present invention.
2 is a block diagram illustrating a brake system of a working machine according to a second embodiment of the present invention.
3 is a block diagram illustrating a brake system of a work machine according to a third embodiment of the present invention.
4 is a block diagram illustrating a brake system of a working machine according to a fourth embodiment of the present invention.
FIG. 5 is a diagram illustrating a process of varying a pressure flow rate output from a forward or backward proportional control valve according to a brake signal amount of the brake sensing unit according to the present invention. FIG.
6 is a flowchart illustrating a braking method of a work machine according to an embodiment of the present invention.
7 is a first partial flow diagram of a braking method for a work machine in accordance with an embodiment of the present invention.
8 is a second partial flow diagram of a braking method of a work machine in accordance with an embodiment of the present invention.
9 is a third partial flowchart of a braking method of a work machine according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view for explaining a brake system of a work machine according to a first embodiment of the present invention, FIG. 2 is a diagram for explaining a brake system of a work machine according to a second embodiment of the present invention, FIG. 3 is a view for explaining a brake system of a work machine according to a third embodiment of the present invention, FIG. 4 is a diagram for explaining a brake system of a work machine according to a fourth embodiment of the present invention, FIG. 5 is a diagram illustrating a process of varying a pressure flow rate output from a forward or backward proportional control valve according to a brake signal amount of the brake sensing unit according to the present invention. FIG.

1, the brake system 100 of the working machine according to the first embodiment of the present invention includes a brake sensing part 110, a traveling state sensing part 120, a hydraulic driving source 130, An ecu unit 140, and a control unit 150. Here, the clutch braking unit 140 performs a function for braking the work machine when the brake pedal 20 is operated, but can perform a function as a hydraulic transmission when the work machine normally travels forward or backward .

In the present embodiment, the brake system 100 of the work machine can be applied to a forklift and can be used as an excavating machine, a loading machine, a conveying machine, a loading machine, a compaction machine, Bulldozers, excavators, and the like.

The brake detecting unit 110 is operated when the engine 10 of the working machine is in the starting ON state and detects whether the operation of the brake pedal 20 is ON or OFF, To the control unit 150, which will be described later. Here, the operation of the brake pedal 20 is ON when the driver is depressing the brake pedal 20, and the operation of the brake pedal 20 is turned OFF when the driver does not press the brake pedal 20 State.

The brake sensing unit 110 may include a sensing device that can sense the operation of the brake pedal 20, such as a pressure sensor, an angle sensor, and the like.

The brake signal generated by the brake sensing unit 110 may be output so that the signal amount may be between 0% and 100%. This may be a pressure, an angle, or the like that may vary when the brake pedal 20 is operated. It is possible by detecting change.

Specifically, when the driver does not press the brake pedal 20 (the brake pedal is in the OFF state), the brake sensing unit 110 determines that the brake signal amount of the brake sensing unit 110 The brake signal is not output to the control unit 150, which will be described later. In the clutch braking unit 140, which will be described later, a deceleration function for braking the working machine It is not implemented.

4, when the driver presses the brake pedal 20 (brake pedal operation is on) for braking the working machine, the brake sensing unit 110 The amount of the brake signal detected by the brake detection unit 110 may be 1%, and the amount of the brake signal applied to the brake pedal 20 may be 1% The signal amount of the brake detection unit 110 may be 100%. In this manner, when the amount of the signal is between 1% and 100%, the break detection unit 110 generates a break signal and outputs the break signal to the controller 150, which will be described later.

As described above, when the brake signal of the brake sensing unit 110 is output to the control unit 150, which will be described later, with a signal amount between 1% and 100%, the control unit 150, which will be described later, So that the clutch braking unit 140, which will be described later, can implement a deceleration function for braking the working machine.

The running state detection unit 120 detects a state in which the work machine is moving forward, backward, or stopped, and outputs a running state signal, for example, a forward signal, a backward signal, or a stop signal to the controller 150 to be described later .

A state in which the forward or backward signal of the running state detection unit 120 is output to the control unit 150 will be described later when the brake signal of the brake detection unit 110 is output to the control unit 150, 150 can control the hydraulic drive source 130 to be described later according to the amount of the brake signal so that a clutch braking unit 140 to be described later can realize a deceleration function for braking the working machine.

The state in which the stop signal of the running state detection unit 120 is output to the control unit 150 to be described later may be a state in which the working machine is stopped by the clutch braking unit 140 described later. At this time, the brake signal of the brake sensing unit 110 keeps the output state of the control unit 150 to be described later so as to maintain the stop state of the working machine.

The hydraulic drive source 130 can supply or block the hydraulic fluid to the clutch braking unit 140 to be described later by the control unit 150 to be described later so that the clutch braking unit 140 to be described later can be activated or deactivated, A control valve 131, and a reverse proportional control valve 132, as shown in FIG.

The forward proportional control valve 131 can perform the function of supplying or shutting off the forward clutch 141 to be described later by the control unit 150 which will be described later according to the operation of the forward / backward lever (not shown) Allows the work machine to travel forward normally.

The reverse proportional control valve 132 may serve to supply or block the reverse clutch 142 to be described later by the control unit 150 to be described later according to the operation of the forward and reverse levers, Allows you to drive.

The forward and backward proportional control valves 131 and 132 allow the working machine to move forward or backward according to the opening or closing of the forward and backward proportional control valves 131 and 132. At this time, And outputs it to the control unit 150.

The forward proportioning control valve 131 is opened so that the pressure of the forward clutch 141 is maintained at the MAX state and the backward proportional control valve 132 is closed so that the pressure of the reverse clutch 142 MIN state. ≪ / RTI >

In the reverse travel, the forward proportional control valve 131 is closed, the forward clutch 141 to be described later maintains the pressure in the MIN state, the reverse proportional control valve 132 is opened, and the pressure of the reverse clutch 142 MAX state. ≪ / RTI >

When the forward or backward travel is normally performed and the driving state detection unit 120 outputs the forward or backward signal to the control unit 150 to be described later, in order to brak the working machine, the driver operates the brake pedal 20 The proportional control valves 131 and 132 are controlled by the hydraulic control unit 130 so that the forward or backward proportional control valves 131 and 132 are controlled by the control unit 150. In this case, And is controlled by the control unit 150 so that the clutch braking unit 140, which will be described later, can realize a deceleration function for braking the working machine.

Specifically, when the working machine is traveling in the forward direction, the driving state detection unit 120 outputs a forward signal to the control unit 150, which will be described later. When the driver operates the brake pedal 20 for braking of the working machine, The signal amount of the brake sensing unit 110 linearly changes between 1% and 100% as shown in FIG. 4, and the signal amount is output to the control unit 150, which will be described later. At this time, The driving source 130 is controlled by the control unit 150 to be described later and the backward proportional control valve 132 in a closed state is linearly output from 1% to 100% in accordance with the amount of the brake signal, The reverse clutch 142 is linearly changed from the MIN state to the MAX state, so that the deceleration function for braking in the forward direction of the working machine can be realized. At this time, the forward proportional control valve 131 maintains the open state and the pressure of the forward clutch 141, which will be described later, maintains the MAX state.

That is, when the brake pedal 20 is actuated, the hydraulic drive source 130 keeps the amount of the compression of the forward proportional control valve 131 at 100% and the speed of the backward proportional control valve 132 Is controlled by the controller 150 to be described later so as to linearly output the compression rate between 1% and 100%, thereby enabling the clutch braking unit 140, which will be described later, to implement a deceleration function for braking in the forward direction of the working machine.

When the brake pedal 20 is actuated, the hydraulic drive source 130 maintains the amount of compression of the backward proportional control valve 132 at 100% and the speed of the forward proportional control valve 131 The clutch braking unit 140, which will be described later, controls the braking operation of the work machine in the backward direction by controlling the braking force of the braking force control unit 150 so as to linearly output the braking force between 1% and 100% This is the opposite case to the case of braking in the forward direction of the above-mentioned working machine, which can be understood from the above description, and thus a detailed description thereof will be omitted.

The hydraulic driving source 130 is stopped when the working machine implements the decelerating function for braking in the forward or backward direction as described above and the traveling state detecting unit 120 outputted to the controller 150, Or the reverse directional braking state or the reverse directional braking state as long as the state in which the brake signal is outputted from the brake detection unit 110 to the control unit 150 to be described later is maintained , So that the clutch braking unit 140, which will be described later, can keep the working machine in a stopped state.

Thereafter, when the driver releases his / her foot from the brake pedal 20 to travel the working machine in the forward or backward direction, the brake signal is not output from the brake sensing unit 110. At this time, the hydraulic driving source 130, The control unit 150 causes the pressure drop from the proportional control valve connected to the reverse clutch in the travel direction to fall from 100% to 0%, whereby the pressure of the reverse clutch in the travel direction becomes the MAX state (Closed state) in the initial state, so that the stopping state of the working machine by the clutch braking unit 140, which will be described later, can be released.

The clutch braking section 140 may be activated or deactivated depending on whether or not the pressurized oil is supplied from the hydraulic drive source 130 and may include the forward clutch 141 and the reverse clutch 142. [ The clutch braking unit 140 according to the present embodiment performs the function for braking the work machine when the brake pedal 20 is operated as described above at the introduction portion, but the work machine normally performs the forward or backward run , It can function as a hydraulic transmission.

The forward clutch 141 and the reverse clutch 142 do not serve as the clutch braking section 140 but may be configured as a hydraulic transmission when the driver manipulates the forward and backward levers to move the working machine forward or backward .

Specifically, when the forward / reverse lever is operated to advance the working machine forward, the forward proportional control valve 131 is opened and the reverse proportional control valve 132 is closed by the control unit 150, which will be described later, 141 are supplied with the pressurized oil to maintain the pressure at the MAX state, and the reverse clutch 142 is not supplied with the pressurized oil, so that the pressure maintains the MIN state and the working machine can travel forward. At this time, the driving state sensing unit 120 may output the forward signal to the controller 150, which will be described later.

Further, when the forward / reverse lever is operated to move the work machine backward, the reverse proportional control valve 132 is opened and the forward proportional control valve 131 is closed by the control unit 150 to be described later so that the reverse clutch 142 Is maintained at the MAX state, and the forward clutch 141 is not supplied with the pressurized oil so that the pressure maintains the MIN state, so that the working machine can travel backward. At this time, the driving state sensing unit 120 may output the backward signal to the controller 150 to be described later.

Thereafter, when the driver brakes the work machine running forward or backward, the forward clutch 141 and the reverse clutch 142 do not serve as a hydraulic transmission but as a clutch braking portion 140 .

Specifically, in the case where the forward-running work machine is braked by the clutch braking unit 140, the running state detecting unit 120 outputs the forward signal to the control unit 150 to be described later, When the driver depresses the brake pedal 20 to brake the brake pedal 20, the brake sensing unit 110 senses the brake signal and outputs the brake signal to the control unit 150 to be described later. Depending on the signal amount (1% to 100%) of the brake signal The reverse clutch 142 of the clutch braking unit 140 is controlled such that the pressure is in a range of MIN to 100% by controlling the control unit 150 to linearly output the compression amount from 1% to 100% from the reverse proportional control valve 132 in a closed state. The forward clutch 141 of the clutch braking unit 140 maintains the MAX state at the time of forward travel as it is and the forward clutch 141 is maintained at the forward state After the state The backward force is increased by the operation of the clutch clutch 142 and the forward force and the backward force are in conflict with each other so that the clutch braking unit 140 can realize a deceleration function for braking in the forward direction of the working machine.

That is, the clutch braking unit 140 controls the hydraulic drive source 130 by the control unit 150 to be described later so that the reverse clutch 142 is operated when the working machine travels in the forward direction, The forward clutch 142 and the backward clutch 142 can be operated in the forward direction.

The clutch braking unit 140 controls the hydraulic drive source 130 by the control unit 150 to be described later so that the forward clutch 141 is operated when the working machine travels in the backward direction, The decelerating function for braking in the forward direction of the working machine can be implemented due to the contradiction between the backward force by the forward clutch 141 and the forward force which is increased by the forward clutch 141. This is in contrast to the case where the above- Which can be understood from the above description, and thus a detailed description thereof will be omitted here.

The clutch braking unit 140 may include a traveling state sensing unit 120 that outputs a control signal to the controller 150 when the working machine implements a deceleration function for braking in the forward or reverse direction as described above, As long as the brake signal is outputted from the brake sensing unit 110 to the control unit 150 to be described later, even if the forward or backward signal changes to the stop signal, the forward direction braking or the backward direction braking state remains unchanged So that it can remain in operation.

The control unit 150 receives the brake signal from the brake sensing unit 110 while receiving the forward signal, the reverse signal, and the stop signal from the driving state sensing unit 120 in real time, The forward / backward proportional control valve 131 or the reverse proportional control valve 132 of the clutch braking unit 140 to implement a deceleration function for braking the working machine.

Even if the forward signal, the backward signal, and the stop signal are input from the traveling state sensing unit 120, the controller 150 may control the brake pedal 20 to be operated by the brake pedal 20 as long as the driver does not press the brake pedal 20 It is of course possible to control the clutch braking unit 140 so that the deceleration function for braking the working machine is not realized because the driver does not intend to brak the working machine because the brake signal is not inputted.

Hereinafter, a process for controlling the controller 150 to implement the decelerating function of the work machine in the clutch braking unit 140 will be described.

First, the control unit 150 receives a running state signal outputted from the running state detecting unit 120, for example, a forward signal, a backward signal, and a stop signal in real time and determines whether the working machine is in a forward running state, It is possible to judge whether it is in a stop state.

The control unit 150 receives the brake signal output from the brake sensing unit 110 by the driver pressing the brake pedal 20 and can compare the brake signal with the driving state signal input in real time.

The control unit 150 determines whether the proportional control valve in the closed state (the flow rate of the hydraulic fluid is 0%) among the forward proportional control valve 131 or the backward proportional control valve 132 of the hydraulic drive source 130 in accordance with the brake signal and the running state signal The operation can be controlled.

In this way, by controlling the operation of the proportional control valve in the closed state, the pressure connected to the proportional control valve in the closed state is supplied to the clutch in the MIN state, so that the clutch braking unit (140) Deceleration function, which will be described in detail below.

The control unit 150 controls the amount of advance (1% to 100%) of the forward signal inputted from the running state sensing unit 120 and the brake signal inputted from the brake sensing unit 110 when the working machine travels in the forward direction, ) Can be controlled so as to linearly output the compressed flow rate between 1% and 100% at the backward proportional control valve 132 in the closed state (the flow rate is 0%). At this time, the controller 150 does not separately control the forward proportional control valve 131 in the opened state (the pressure drop is 100%).

Accordingly, the reverse clutch 142 of the clutch braking unit 140 is supplied with the pressurized oil through the reverse proportional control valve 132, which is operated from the closed state to the open state, so that the pressure linearly changes from the MIN state to the MAX state The forward clutch 141 of the clutch braking unit 140 is in the open state and the forward proportional control valve 131 is in the open state. The backward force increased by the reverse clutch 142 is in conflict with the forward force by the forward clutch 141 because the pressure of the working machine is maintained in the MAX state by the pressure supplied through the reverse clutch 142, So that a deceleration function for braking in the forward direction of the working machine can be implemented in the clutch braking unit 140. [

When the work machine travels in the backward direction, the control unit 150 controls the amount of the backward signal input from the traveling state sensing unit 120 and the signal amount of the brake signal input from the brake sensing unit 110 100%), it is possible to control so that the forward flow proportional control valve 131 in the closed state (pressure flow rate 0%) linearly outputs the pressure flow rate between 1% and 100%. At this time, the control unit 150 does not separately control the reverse proportional control valve 132 in the opened state (the compression amount is 100%).

Accordingly, the forward clutch 141 of the clutch braking unit 140 is supplied with the pressurized oil through the forward proportional control valve 131, which is operated from the closed state to the open state, so that the pressure linearly changes from the MIN state to the MAX state Operation of the forward clutch 141 increases the forward force of the work machine. At this time, the reverse clutch 142 of the clutch braking unit 140 moves the reverse proportional control valve 132 The forward force increased by the forward clutch 141 is in conflict with the backward force by the reverse clutch 142 because the pressure is kept in the MAX state by the pressure supplied through the forward clutch 141 so that the backward force of the working machine is maintained as it is And a deceleration function for braking in the reverse direction of the work machine can be implemented in the clutch braking unit 140. [

In addition, when the work machine is stopped by the implementation of the deceleration function for braking in the forward or backward direction as described above, the control unit 150 receives a stop signal from the running state detection unit 120. In this case, It is possible to control the hydraulic drive source 130 so that the clutch braking unit 140 can maintain the operating state so that the work machine can remain in a stopped state while the brake signal of the part 110 is input.

Thereafter, when the driver releases his / her foot from the brake pedal 20 in order to travel the work machine in the forward or backward direction, the brake signal is not output from the brake sensing unit 110, The proportional control valve connected to the clutch can be controlled to be in the closed state in the initial state, whereby the pressure of the clutch opposed to the clutch in the running direction is changed from the MAX state to the MIN state in the initial state, Thereby allowing the stopping state of the working machine to be canceled.

Accordingly, in the first embodiment, the braking of the working machine can be performed by the clutch braking system using the hydraulic transmission, so that the installation of the existing brake system (axle braking system) for pressing the axle can be omitted, It is not necessary to install a cooling system.

2 is a block diagram illustrating a brake system of a working machine according to a second embodiment of the present invention.

2, the brake system 200 of the working machine according to the second embodiment of the present invention includes a brake sensing portion 110, a traveling state sensing portion 120, a hydraulic driving source 130, An actuator 140, a controller 150, a brake valve 230, and an axle braking unit 240.

In the second embodiment of the present invention, the brake system 200 of the working machine can be applied to a forklift, and can be used in various fields such as excavating equipment, loading equipment, conveying equipment, loading equipment, compaction equipment, It is of course also applicable to bulldozers and excavators as basic construction equipment.

In the second embodiment of the present invention, the remaining components except for the brake valve 230 and the axle braking unit 240 are the same as those in the brake system 100 of the working machine according to the first embodiment of the present invention The same reference numerals are used to designate the same or similar components. Accordingly, in order to avoid duplication of the description, a detailed description of each of the same components will be omitted, and a brake valve 230 and the axle braking unit 240 will be described.

The brake valve 230 is operated such that the driver operates the brake pedal 20 in a state where the forward or backward travel is normally performed and the running state detection unit 120 outputs the forward or backward signal to the control unit 150. [ The hydraulic pressure is supplied to the axle braking unit 240, which will be described later. When the hydraulic brakes are in the open state, the hydraulic brakes 240 are supplied to the axle braking unit 240 to stop the working machine, The supply of the hydraulic oil to the axle braking unit 240 is interrupted to allow the working machine to travel in the forward and backward directions. At this time, the brake valve 230 may be a valve that allows the pressure applied by the brake pedal 20 to be used as the hydraulic pressure by the driver's force.

The traveling in the forward and backward directions of the working machine can be carried out as either the forward proportional control valve 131 or the reverse proportional control valve 132 is opened and the other is closed as described in the first embodiment At this time, the running state detection unit 120 may output the forward signal or the backward signal to the control unit 150. [

When the forward or backward travel is normally performed and the driving state detection unit 120 outputs the forward or backward signal to the control unit 150, the driver operates the brake pedal 20 The forward or reverse proportional control valves 131 and 132 are controlled by the control unit 150 so that the clutch braking unit 140 is operated as described in the first embodiment so that the braking of the working machine can be implemented The braking operation of the working machine can be implemented by pressing the axle (not shown) of the brake unit 241, which will be described later, on the supply door to the axle braking unit 240, (Axle braking system).

The axle braking unit 240 can be installed in an axle (not shown) of the working machine and can be operated or deactivated depending on whether or not the pressurized oil is supplied through the brake valve 230 and the brake unit 241 And the like.

The brake unit 241 is a device for braking a drive wheel when the work machine is running. The brake unit 241 may be a multi-plate type brake device for braking a disk provided on the axle by friction plates, and various other commonly used brake devices .

The axle braking unit 240 is configured such that the pressure oil is supplied to or cut off from the brake unit 241 through the brake valve 230 in accordance with the operation of the brake pedal 20 so that the brake unit 241 can press I will.

In the second embodiment of the present invention, the braking of the working machine can be realized by the clutch braking system by the operation of the clutch braking unit 140 and the axle braking system by the operation of the axle braking unit 240 In this case, the braking by the clutch braking method and the braking by the axle braking method can be performed simultaneously or sequentially, but it is preferable that the braking by the axle braking method for directly braking the axle is performed first for stable braking of the working machine have.

As a result, in the second embodiment, the braking force of the working machine can be braked by the axle braking system and the clutch braking system, so that the braking force of the working machine can be dispersed in the clutch without being concentrated on the axle, The conventional number of friction plates can be reduced, and the reduction of heat generation can eliminate the existing cooling system or reduce the specification.

3 is a block diagram illustrating a brake system of a work machine according to a third embodiment of the present invention.

3, the brake system 300 of the working machine according to the third embodiment of the present invention includes a brake sensing unit 110, a traveling state sensing unit 120, a hydraulic driving source 130, An axle 140, a control unit 150, an axle braking unit 240, and a brake valve 330.

In the third embodiment of the present invention, the brake system 300 of the working machine can be applied to a forklift and can be used in various fields such as excavation equipment, loading equipment, conveying equipment, loading equipment, compaction equipment, It is of course also applicable to bulldozers and excavators as basic construction equipment.

In the third embodiment of the present invention, the brake valve 330 is configured to be under the control of the controller 150, unlike the second embodiment, and the remaining components are the same as the first embodiment or the second embodiment of the present invention The same reference numerals as in the brake systems 100 and 200 of the working machine according to the embodiment are used and the same reference numerals are used. Accordingly, in order to avoid duplication of the description, the detailed description of the same components will be omitted Only the brake valve 330, which is a component different from the first embodiment or the second embodiment of the present invention, will be described.

The brake valve 330 may serve to supply or cut off the hydraulic fluid to the axle braking unit 240 by the control unit 150 according to the operation of the brake pedal 20. When the brake pedal 20 is in the open state, The work machine is stopped by supplying the pressurized oil to the eccentric portion 240. When the work machine is in the closed state, the supply of the pressurized oil to the axle braking portion 240 is cut off so that the work machine can travel in the forward and backward directions. At this time, the brake valve 330 may be a proportional control valve.

The traveling in the forward and backward directions of the working machine can be carried out as either the forward proportional control valve 131 or the reverse proportional control valve 132 is opened and the other is closed as described in the first embodiment At this time, the running state detection unit 120 may output the forward signal or the backward signal to the control unit 150. [

When the forward or backward travel is normally performed and the driving state detection unit 120 outputs the forward or backward signal to the control unit 150, the driver operates the brake pedal 20 The brake sensing unit 110 senses the brake signal and outputs a brake signal to the control unit 150. At this time, the forward or backward proportional control valves 131 and 132 are controlled by the control unit 150, The clutch braking unit 140 can implement a deceleration function for braking the working machine and the brake valve 330 is controlled by the control unit 150 to control the axle braking unit 240 , The brake unit 241 presses an axle (not shown) to brake the work machine (axle braking system).

Thereafter, when the driver releases his / her foot from the brake pedal 20 to travel the work machine in the forward or backward direction, the brake signal is not output from the brake sensing unit 110. At this time, as described in the first embodiment The clutch braking unit 140 is returned to the initial state and functions as a hydraulic transmission and the control unit 150 cuts off the pressure oil supplied to the axle braking unit 240 through the brake valve 330 By releasing the squeezed state of the axle, the stopping state of the working machine by the clutch braking unit 140 and the axle braking unit 240 can be released.

The control unit 150 receives the brake signal from the brake sensing unit 110 while receiving the forward signal, the reverse signal, and the stop signal output from the driving state sensing unit 120 in real time, 131 and the reverse proportional control valve 132 or the brake valve 330 so as to realize the braking of the work machine at the clutch braking section 140 and the axle braking section 240.

The control unit 150 can control not only the clutch braking unit 140 and the axle braking unit 240 to operate simultaneously but also any one of the clutch braking unit 140 and the axle braking unit 240 It may be preferable that the braking by the axle braking method is performed so that the axle braking unit 240 for directly braking the axle is first operated for stable braking of the work machine.

As described above, the control unit 150 can implement the braking of the working machine through the clutch braking unit 140 and the axle braking unit 240. The implementation of the deceleration function of the working machine in the clutch braking unit 140 In order to avoid redundant description, the control unit 150 controls the braking of the work machine by the axle braking unit 240 in order to avoid redundant explanation because it has been described in the first embodiment.

First, the control unit 150 receives a running state signal outputted from the running state detecting unit 120, for example, a forward signal, a backward signal, and a stop signal in real time and determines whether the working machine is in a forward running state, It is possible to judge whether it is in a stop state.

The control unit 150 receives the brake signal output from the brake sensing unit 110 by the driver pressing the brake pedal 20 and can compare the brake signal with the driving state signal input in real time.

The control unit 150 can control the brake valve 330 by a brake signal and a traveling state signal.

As the control unit 150 controls the operation of the brake valve 330, the brake fluid is supplied to the brake unit 241 connected to the brake valve 330 so that the braking of the working machine can be realized by the axle braking unit 240 Which will be described in detail below.

When the work machine travels in the forward direction or the backward direction, the control unit 150 controls the forward or backward signals inputted from the traveling state detection unit 120 and the brake signal inputted from the brake detection unit 110, So that the pressure oil can be controlled to be output through the valve 330.

Accordingly, the brake unit 241 of the axle braking unit 240 is supplied with the pressurized oil through the brake valve 330 so as to press the axle, thereby enabling braking of the working machine in the forward or reverse direction.

In addition, when the working machine is stopped by the forward or reverse direction braking as described above, the control unit 150 receives a stop signal from the running state sensing unit 120. In this case, the brake unit It is possible to control the brake valve 330 so that the axle braking unit 240 can maintain the operating state so that the work machine can remain in a stopped state while the signal is being input.

Thereafter, when the driver releases his / her foot from the brake pedal 20 in order to travel the work machine in the forward or backward direction, the brake signal is not outputted from the brake sensing unit 110, so that the brake valve 330 Can be controlled to be the closed state in the initial state, thereby enabling the stopping state of the working machine to be released.

Accordingly, in the third embodiment, the braking force of the working machine can be controlled by the axle braking system and the clutch braking system, so that the braking force of the working machine can be dispersed in the clutch without being concentrated on the axle, The conventional number of friction plates can be reduced, and the reduction of heat generation can eliminate the existing cooling system or reduce the specification.

4 is a block diagram illustrating a brake system of a working machine according to a fourth embodiment of the present invention.

4, the brake system 400 of the working machine according to the fourth embodiment of the present invention includes a brake sensing portion 110, a traveling state sensing portion 120, a hydraulic driving source 130, An axle 140, a control unit 150, an axle braking unit 240, a brake valve 330, and a brake selection unit 410.

In the fourth embodiment of the present invention, the brake system 400 of the working machine can be applied to a forklift and can be used in various fields such as excavation equipment, loading equipment, conveying equipment, loading equipment, compaction equipment, It is of course also applicable to bulldozers and excavators as basic construction equipment.

In the fourth embodiment of the present invention, the remaining components except for the brake selection unit 410 are the same as those of the brake system of the working machine according to the first, second, or third embodiment of the present invention 100, 200, and 300, and the same reference numerals are used for the same components. Therefore, in order to avoid redundancy, detailed descriptions of the same components will be omitted. In the first embodiment of the present invention, Only the braking selector 410, which is a component different from the second embodiment or the third embodiment, will be described.

The braking selection unit 410 is operated when the engine 10 is in the starting ON state and outputs a braking selection signal obtained by the driver selecting at least one of the clutch braking unit 140 and the axle braking unit 240 to the control unit 150 and a clutch braking switch 411 and an axle braking switch 412 so as to be able to output the signals.

The braking selection unit 410 may be provided in a cluster of a driver's seat. The driver can select the degree of deceleration, thereby enabling customized braking to be performed in accordance with the sensibility of the driver.

The clutch braking switch 411 is a switch that allows the clutch braking unit 140 to implement a decelerating function for braking the working machine. When the driver turns on the clutch braking switch 411, The clutch braking signal is output to the control unit 150 together with the brake signal to control the forward or backward proportional control valves 131 and 132 of the hydraulic driving source 130 so as to control the clutch braking unit 140, Can be operated. At this time, the control unit 150 does not control the brake valve 330 of the hydraulic drive source 130, so that the axle braking unit 240 is not operated. That is, the clutch braking switch 411 enables the braking of the working machine to be realized by the clutch braking system.

Thereafter, when the driver turns off the clutch braking switch 411, it performs the function described in the third embodiment.

The axle braking switch 412 is a switch that enables the braking of the work machine to be implemented in the axle braking section 240. When the driver turns on the axle braking switch 412, So as to control the brake valve 330 so that the axle braking unit 240 is operated. At this time, the control unit 150 does not control the forward or backward proportional control valves 131 and 132 of the hydraulic drive source 130, so that the clutch braking unit 140 is not operated. That is, the axle brake switch 412 makes it possible to implement the braking of the working machine in an axle braking system.

Thereafter, when the driver turns off the axle brake switch 412, it performs the function as described in the third embodiment.

When the driver selects both of the clutch braking switch 411 and the axle brake switch 412, or does not select all of them, the same function as described in the third embodiment is performed.

Hereinafter, a braking method of a work machine using the brake systems 100, 200, 300, and 400 of the working machines according to the first to fourth embodiments of the present invention will be described with reference to FIGS. 6 to 9, same.

FIG. 5 is a flow chart for explaining a braking method of a work machine according to an embodiment of the present invention, FIG. 6 is a first partial flowchart of a braking method of a work machine according to an embodiment of the present invention, FIG. 9 is a third partial flowchart of a braking method of a work machine according to an embodiment of the present invention. FIG. 9 is a second partial flowchart of a braking method of a working machine according to an embodiment of the present invention.

6, a braking method for a work machine using a brake system 100, 200, 300, 400 of a working machine according to an embodiment of the present invention includes a control unit 150, The control unit 150 receives the brake signal from the brake sensing unit 110 in step S520. The control unit 150 receives the driving state signal and the brake signal from the brake sensing unit 110 in step S520. The operation of the corresponding proportional control valve in the closed state among the forward proportional control valve 131 or the backward proportional control valve 132 of the hydraulic drive source 130 is controlled in accordance with the result of the comparative analysis, (S530) in which pressure oil is supplied to the corresponding clutch connected to the proportional control valve among the clutch 141 or the reverse clutch 142 to implement braking of the working machine.

In step S510, the control unit 150 receives the running state signal from the running state sensing unit 120. [

In the above, the running state signal is a signal that the running state detecting unit 120 detects the forward, backward, or stopped state of the working machine and outputs the detected signal as a forward signal, a backward signal, or a stop signal.

In step S520, the control unit 150 receives a brake signal from the brake sensing unit 110. [

The brake signal may be a signal that the brake sensing unit 110 senses the depression of the brake pedal 20 and outputs the brake signal.

In step S530, the control unit 150 determines whether or not the corresponding one of the forward proportional control valve 131 or the reverse proportional control valve 132 of the hydraulic driving source 130 in the closed state, based on the result of the comparison between the traveling state signal and the brake signal The operation of the proportional control valve is controlled so that pressurized oil is supplied to the corresponding clutch connected to the proportional control valve among the forward clutch 141 or the reverse clutch 142 of the clutch braking portion 140 to implement the braking of the working machine.

When the running state signal is the forward signal, the proportional control valve is the reverse proportional control valve 132, the clutch may be the reverse clutch 142, and the backward force, which is increased by the reverse clutch 142, The deceleration function for braking in the forward direction of the working machine can be implemented in the clutch braking unit 140 because of a conflict with the forward force by the clutch 141. [

Conversely, when the running state signal is a reverse signal, the proportional control valve is the forward proportional control valve 131, the clutch may be the forward clutch 141, and the forward force, which is increased by the forward clutch 141, The decelerating function for braking in the reverse direction of the working machine in the clutch braking unit 140 can be realized.

7, after the brake pedal 20 is depressed after performing step S510, the braking method of the working machine according to the embodiment of the present invention includes the actuation of the brake valve 230, The braking operation of the working machine may be implemented by supplying pressurized oil to the brake unit 241 of the idle portion 240 (S540).

When the running state signal is a forward signal or a backward signal, pressurized oil is supplied to the brake unit 241 of the axle braking unit 240 while the brake valve 230 is operated, thereby pressing the axle, Directional braking can be performed.

Step S540 of implementing the braking of the work machine in the axle braking unit 240 may be performed sequentially or simultaneously with step S530 of implementing the braking of the work machine in the clutch braking unit 140. [ When the braking of the working machine is sequentially performed, it is preferable that the braking by the axle braking method is performed so that the axle braking unit 240 for directly braking the axle is operated first for stable braking of the working machine.

8, after performing steps S510 and S520, the control unit 150 compares the traveling state signal and the brake signal with each other to analyze and analyze the traveling state signal and the brake signal, The step S550 may include controlling the operation of the brake valve 330 according to the result and supplying brake fluid to the brake unit 241 of the axle braking unit 240 to implement braking of the work machine .

When the running state signal is a forward signal or a backward signal, pressure oil is supplied to the brake unit 241 of the axle braking unit 240 while the brake valve 330 is operated, thereby pressing the axle, Directional braking can be performed.

The step S550 of implementing the braking of the work machine in the axle braking unit 240 may be performed sequentially or simultaneously with the step S530 of implementing the braking of the work machine in the clutch braking unit 140. When the braking of the working machine is sequentially performed, it is preferable that the braking by the axle braking method is performed so that the axle braking unit 240 for directly braking the axle is operated first for stable braking of the working machine.

9, when the control unit 150 receives the braking selection signal from the braking selection unit 410, the control unit 150 determines that the braking operation is being performed, (S515).

In the above, the braking selection signal is generated by a clutch braking signal that allows the clutch braking unit 140 to implement a deceleration function for braking the working machine, and a braking signal that enables braking of the working machine in the axle braking unit 240 And an axle brake signal to be selected.

When the control unit 150 receives the clutch braking signal, the control unit 150 proceeds to step S530 via step S520 and allows the clutch braking unit 140 to implement a deceleration function for braking the working machine.

When the control unit 150 receives the axle braking signal, the control unit 150 proceeds to step S540 via step S520 so that the axle braking unit 240 can implement braking of the working machine.

If the control unit 150 does not receive or receive the clutch braking signal and the axle braking signal, the braking of the working machine can be implemented in the clutch braking unit 140 and the axle braking unit 240.

As described above, according to the present embodiment, the braking force of the working machine can be distributed to the clutch without being concentrated on the axle by configuring the braking of the working machine by the axle braking system and the clutch braking system, It is possible to reduce the number of friction plates of the axle and to reduce the load of the axle due to friction during braking to increase the life of the axle and the life of the internal parts of the axle, And the cost of the working machine can be reduced.

In this embodiment, at least one of the clutch braking system and the axle braking system can be selected so that the driver can select the degree of deceleration, and the driver can select the degree of deceleration, The discomfort felt during the braking process of the machine can be solved and the safe operation of the working machine can be ensured.

In addition, in this embodiment, since the braking of the working machine can be performed by the clutch braking system using the hydraulic transmission, the installation of the existing brake system (axle braking system) for pressing the axle can be omitted, It is possible to prolong the lifetime of the axle, to reduce the cost due to the maintenance or replacement of the axle, to eliminate the need to install a cooling system in the axle, The company will be able to gain competitive edge with other companies.

In this embodiment, the amount of pressure oil output from the forward or backward proportional control valve of the hydraulic drive source is controlled according to the amount of the brake signal so that the braking of the working machine can be performed, So that the driver can arbitrarily adjust the degree of deceleration and improve the braking stability of the working machine.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: engine 20: brake pedal
100, 200, 300, 400: Brake system
110: Brake detection unit 120:
130: Hydraulic drive source 131: Forward proportional control valve
132: reverse ratio control valve 140: clutch disengagement portion
141: forward clutch 142: reverse clutch
230, 330: brake valve 240: axle-
241: Brake unit 410: Brake selection unit
411: clutch brake switch 412: axle brake switch

Claims (20)

A brake sensing unit for sensing the depression of the brake pedal and outputting a brake signal;
A running state detecting unit for detecting a forward, backward, or stop state of the work machine and outputting a running state signal;
A clutch braking portion that is operated or deactivated depending on whether or not the pressurized oil is supplied from the hydraulic drive source, the clutch braking portion including a forward clutch and a reverse clutch;
A brake valve operated by operation of the brake pedal; And
And an axle braking portion mounted on an axle of the working machine and operated or released according to whether or not the pressure oil is supplied through the brake valve,
Wherein the braking of the working machine is realized by a combination of an axle braking system by an operation of the axle braking unit and a clutch braking system by an operation of the clutch braking unit, wherein the axle braking unit and the clutch braking unit And a deceleration function for braking the working machine is implemented. The brake control apparatus according to claim 1,
A pressure sensor or angle sensor comprising a sensing device for sensing the actuation of the brake pedal. The method according to claim 1,
The running state signal is a forward signal,
When the reverse proportional control valve connected to the reverse clutch is operated from the closed state to the open state,
And a decelerating function for braking in the forward direction of the working machine is implemented in the clutch braking portion as the backward force increased by the reverse clutch conflicts with the forwarding force by the forward clutch. The method according to claim 1,
The running state signal is a backward signal,
When the forward proportional control valve connected to the forward clutch is operated from the closed state to the open state,
And a decelerating function for braking in the reverse direction of the work machine is implemented in the clutch braking portion as the forward force increased by the forward clutch conflicts with the backward force by the reverse clutch. delete The method according to claim 1,
The running state signal is a forward signal or a backward signal,
When the brake pedal is operated by the brake pedal,
And a braking unit for braking the forward or backward direction of the working machine is realized by supplying pressurized oil to the brake unit of the axle braking unit and pressing the axle. delete delete The steering apparatus according to claim 1, wherein the axle-
Wherein the brake system is operated simultaneously or sequentially with the clutch braking unit. The method according to claim 1,
Further comprising a braking selection unit for outputting a braking selection signal so that at least one of the clutch braking unit and the axle braking unit is selectively operated by an operation of the driver. 11. The method of claim 10,
The braking selection signal is a clutch braking signal,
When the corresponding proportional control valve in the closed state is operated among the forward proportional control valve or the reverse proportional control valve of the hydraulic drive source according to the result of comparing and analyzing the clutch braking signal, the running state signal and the brake signal,
Wherein pressure oil is supplied to a clutch connected to the proportional control valve among the forward clutch or the reverse clutch of the clutch braking portion so that the braking of the working machine is realized. 11. The method of claim 10,
The braking selection signal is an axle braking signal,
When the brake valve is operated,
And a braking unit for braking the forward or backward direction of the working machine is realized by supplying pressurized oil to the brake unit of the axle braking unit and pressing the axle. 11. The method of claim 10,
Wherein the braking selection signal is a clutch braking signal and an axle braking signal,
When both the clutch braking signal and the axle braking signal are inputted or not inputted,
Wherein the braking of the working machine is realized by the clutch braking unit and the axle braking unit. The control unit receiving the running state signal from the running state detecting unit;
The control unit receiving a brake signal from the brake sensing unit;
Controlling the operation of the brake valve according to a result of comparing and analyzing the running state signal and the brake signal so that braking of the working machine is implemented by supplying pressurized oil to the brake unit of the axle braking unit; And
The control unit controls the operation of the proportional control valve in the closed state among the forward proportional control valve or the reverse proportional control valve of the hydraulic driving source according to the result of comparing and analyzing the traveling state signal and the brake signal, The hydraulic fluid is supplied to the corresponding clutch connected to the proportional control valve among the forward clutch and the reverse clutch so that the braking of the working machine is implemented in addition to the braking of the working machine by the clutch braking portion, And the step of dividing the braking force to implement the deceleration function for braking the working machine. delete delete delete 15. The method of claim 14, further comprising: before receiving the break signal,
Further comprising the step of the controller receiving the brake selection signal from the brake selection unit. 19. The method as claimed in claim 18,
A clutch braking signal for enabling the deceleration function for braking the working machine to be implemented in the clutch braking section; And
And an axle braking signal for selecting the braking of the working machine to be implemented in the axle braking section. 20. The method of claim 19,
Wherein the control unit controls the clutch braking unit to implement a deceleration function for braking the working machine when the clutch braking signal is input,
Wherein the control unit controls the braking of the working machine to be implemented in the axle braking unit when receiving the axle braking signal,
Wherein the control unit controls the braking of the working machine in the clutch braking unit and the axle braking unit when the control unit does not receive or receive the clutch braking signal and the axle braking signal .

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