CN103904845A - Direct driving type motor suite and electromobile - Google Patents

Abstract

The invention discloses a direct-drive motor kit and an electric vehicle, comprising a box body and two outer rotor motors placed inside the box body, and the motor shafts of the two outer rotor motors are coaxial. The stators of each of the outer rotor motors are fixed inside the box body, each of the stators penetrates transversely in the axial direction of the motor shaft, the rotor is sleeved on the outside of the stator, and the rotor and the The motor shaft is fixed, and the motor shaft crosses the stator and rotatably cooperates with the stator. The applicant creatively combined two outer rotor motors into an overall kit, which not only reduces the volume of the motor, makes the structure of the motor more compact, and facilitates the design of a smaller and lighter electric vehicle, but also It is convenient to select according to the requirements on the electric vehicle, and is convenient for replacement and maintenance; since the outer rotor motor directly drives the driving wheel of the electric vehicle, it can effectively reduce energy loss and improve driving efficiency.

Description

Direct drive motor kit and electric vehicle

technical field

The invention relates to the field of electric vehicles, in particular to a direct drive motor applied to electric vehicles.

Background technique

The drive systems of electric vehicles or hybrid electric vehicles currently on the market basically use one or two motors to replace the original engine of an ordinary car, and cooperate with a reducer or a transmission, through a drive shaft, a differential mechanism, etc. Speed universal joint (CVJ, Constant Velocity Joint) to achieve power transmission. However, if the motor is powered by a reducer, a transmission, or a differential mechanism, it is necessary to allow the motor to rotate at a high speed, which will not only cause the loss of the motor itself, but also the loss during the power transmission process, thereby reducing the battery life of the car. mileage.

In addition, the motors of existing electric vehicles are generally inner-rotor motors. Since the inner-rotor motors generally have a relatively high speed, they need to be used with a reducer, which takes up a large space and cannot control the volume of the motor.

Therefore, it is necessary to provide a new electric vehicle motor.

Contents of the invention

The invention provides a new direct-drive motor kit and an electric vehicle.

The invention provides a direct-drive motor kit, which includes a box body and two outer rotor motors placed inside the box body, and the motor shafts of the two outer rotor motors are coaxial.

The stators of each of the outer rotor motors are fixed inside the box, and each of the stators penetrates transversely in the axial direction of the motor shaft, and the rotor is sleeved on the outside of the stator, and the rotor and the The motor shaft is fixed, and the motor shaft traverses the stator and rotatably cooperates with the stator.

The manners of the rotation cooperation between the motor shaft and the stator include: the rotation cooperation between the motor shaft and the stator directly; and the rotation cooperation between the motor shaft and the box body.

Since the box unit and the stator are fixed, the implementation of the rotational connection between the motor shaft and the box unit may include: the motor shaft is directly rotationally connected to the box unit, and the motor shaft is directly rotationally connected to the stator.

The box unit has an opposite first end and a second end in the axial direction of the motor shaft, the two first ends are adjacent and fixed, and the two motor shafts respectively protrude from the two second end.

The motor shaft is rotatably connected to the box unit through a bearing.

Both the motor shaft and the first and second ends are rotatably connected through the bearings.

Both the first end and the second end may be provided with end covers, and the motor shaft is rotatably connected to the two end covers through bearings.

An electric vehicle, comprising a vehicle frame, a drive wheel and the direct-drive motor kit, the direct-drive motor kit is arranged on the vehicle frame, and the two motor shafts of the direct-drive motor kit are respectively connected to the corresponding The drive wheels are directly connected.

Each direct-drive motor kit drives two coaxial drive wheels. between), it can also be biased towards one of the driving wheels (that is, the direct drive motor kit is arranged asymmetrically between the two driving wheels).

There are two direct-drive motor kits, the drive wheels include a pair of front wheels at the front and a pair of rear wheels at the rear, and the two direct-drive motor kits directly drive the pair of front wheels respectively and the pair of rear wheels.

The driving force and model of the direct drive motor kit driving the front and rear wheels can be different.

The direct-drive motor kit has a drive wheel including a pair of front wheels at the front and a pair of rear wheels at the rear, and the direct-drive motor kit directly drives the pair of front wheels or the pair of rear wheels. wheel.

The beneficial effects of the present invention are: the applicant creatively combines two outer rotor motors into a whole kit, which can not only reduce the volume of the motor, make the structure of the motor more compact, and facilitate the design of a more compact and lightweight electric vehicle , and because of the kit, it is also easy to select on the electric vehicle according to the requirements, and it is convenient for replacement and maintenance; because the outer rotor motor directly drives the driving wheel of the electric vehicle, it can effectively reduce energy loss and improve driving efficiency.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a direct-drive motor kit in this embodiment;

Fig. 2 is a schematic structural view of an electric vehicle to which a direct-drive motor kit of this embodiment is applied.

FIG. 3 is another structural schematic diagram of an electric vehicle to which the direct-drive motor kit of the present embodiment is applied.

Detailed ways

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

As shown in FIGS. 1 and 2 , in one embodiment, the direct-drive motor kit 1 includes a box body 8 and two outer rotor motors 9 placed inside the box body 8 . Each outer rotor motor 9 includes a stator 3, a motor shaft 5 and a rotor 4, the stator 3 is fixed, the motor shaft 5 is in rotation with the stator 3, the rotor 4 is sleeved on the outside of the stator 3 and fixed with the motor shaft 5, The two motor shafts 5 are coaxial and directly connected with the two driving wheels 72 of the electric vehicle respectively. The two motor shafts 5 cross the box body 8 in the axial direction, and protrude from both sides of the box body 8 respectively, and the protruding parts can be directly connected with the driving wheel 72 .

When energized, the rotor 4 rotates synchronously with the motor shaft 5, and the motor shaft 5 drives the driving wheel 72 of the electric vehicle to rotate.

As shown in FIG. 1 and FIG. 2 , in one embodiment, the direct drive motor kit 1 includes a box body 8 and two outer rotor motors 9 placed in the box body 8 . The box body 8 may include two box body units 2 integrally connected by fasteners, and each box body unit 2 has an inner space 21 . The outer rotor motor 9 includes a stator 3, a rotor 4 and a motor shaft 5, the stator 3 is fixedly arranged in the inner space 21 of the box unit 2, the stator 3 runs through the axial direction of the motor shaft 5, and the rotor 4 is arranged in the box unit. The inner space 21 is also located outside the stator 3 , the motor shaft 5 crosses the stator 3 , the motor shaft 5 is fixed to the rotor 4 and connected to the box unit 2 in rotation. The motor shafts 5 of the two motors can be coaxial. When the stator 3 is energized, the rotor 4 rotates synchronously with the motor shaft 5 .

Further, the box unit 2 has opposite first ends 22 and second ends 23 in the axial direction of the motor shaft, the first ends 22 of the two box units are adjacent and fixedly connected, so that the two outer rotor motors 9 forms an overall kit, the second ends 23 of the two box units 2 are far away, and the two motor shafts 5 protrude laterally from the second ends 23 of the two box units.

Further, the box unit 2 may include a housing 24, a first end cover 25 arranged at the first end and a second end cover 26 arranged at the second end, the first end cover 25 and the second end cover 26 are both connected to The housing 24 is fixed, and an inner space 21 is formed between the first end cover 25 , the second end cover 26 and the housing 24 . Both the first end cover 25 and the second end cover 26 can be provided with a bearing 6, and the motor shaft 5 is installed on the first end cover 25 and the second end cover 26 through the bearing 6, so that the motor shaft 5 and the box unit 2 Turn to connect.

As shown in FIG. 1 and FIG. 2 , the direct-drive motor kit 1 can be applied to electric vehicles, which include electric vehicles and hybrid electric vehicles. Electric vehicle comprises vehicle frame 71, driving wheel 72 and direct-drive motor kit 1, and direct-drive motor kit 1 is installed on the vehicle frame 71, and its two motor shafts 5 are directly connected with two driving wheels 72 respectively. For a two-wheel drive electric vehicle, only one direct drive motor kit may be provided. For four-wheel-drive electric vehicles, two direct-drive motor kits can be provided.

As shown in FIG. 3 , for a four-wheel drive electric vehicle, one direct-drive motor kit can be provided only on the front wheel; of course, one direct-drive motor kit can also be provided only on the rear wheel.

For the electric vehicle, since the motor shaft 5 and the driving wheel 72 are directly connected, the motor shaft 5 and the driving wheel 72 can move synchronously at a constant speed. The specific way of direct connection, such as connecting through a constant velocity universal joint.

The direct-drive motor kit adopts an external rotor motor, which can effectively reduce the speed of the motor while ensuring the output torque, so that no existing reducer is needed, the volume of the motor is reduced, and the weight of the motor is effectively reduced; , the motor shaft of the direct-drive motor kit directly drives the driving wheel of the electric vehicle, which reduces the energy loss of the motor itself and the energy loss in power transmission, improves the driving efficiency, and effectively extends the cruising mileage of the electric vehicle, which is equivalent to the same distance, using the motor kit of the present invention, the battery required to be loaded can be reduced to a certain extent, which can reduce the cost and reduce the weight of the vehicle body.

The above content is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. Those of ordinary skill in the technical field to which the present invention belongs can also make some simple deduction or replacement without departing from the concept of the present invention.

Claims (8)

1. a direct-driving electric suite, is characterized in that, comprises box body and is placed in two external rotor electric machines of described box body inside, the motor shaft coaxial line of two described external rotor electric machines.

2. direct-driving electric suite as claimed in claim 1, it is characterized in that, the stator of each described external rotor electric machine is fixed on the inside of described box body, each described stator lateral direction penetrating on the axis direction of described motor shaft, described rotor is enclosed within the outside of described stator, described rotor and described motor shaft are fixed, and described motor shaft crosses described stator and coordinates with described stator rotation.

3. direct-driving electric suite as claimed in claim 2, it is characterized in that, described box body comprises two box body unit that are fixedly connected with, two described external rotor electric machines are placed in respectively the inside of two described box body unit, each described box body unit has relative first end and the second end on the axis direction of described motor shaft, two described first ends are adjacent and fixing, and two described motor shafts stretch out respectively two described the second ends.

4. direct-driving electric suite as claimed in claim 3, is characterized in that, described motor shaft and described box body unit are dynamically connected by bearing rotary.

5. direct-driving electric suite as claimed in claim 4, is characterized in that, described motor shaft and described first and second end are all dynamically connected by described bearing rotary.

6. an electric motor car, comprise vehicle frame and driving wheel, it is characterized in that, also comprise the direct-driving electric suite described in any one in claim 1-5, described direct-driving electric suite is located at described vehicle frame, and two motor shafts of described direct-driving electric suite are direct-connected with corresponding described driving wheel respectively.

7. electric motor car as claimed in claim 6, it is characterized in that, described direct-driving electric suite has two, and described driving wheel comprises the pair of rear wheels that is positioned at anterior a pair of front-wheel and is positioned at rear portion, two described direct-driving electric suites directly drive respectively this to front-wheel with this to trailing wheel.

8. electric motor car as claimed in claim 6, it is characterized in that, described direct-driving electric suite has one, and described driving wheel comprises the pair of rear wheels that is positioned at anterior a pair of front-wheel and is positioned at rear portion, described direct-driving electric suite directly drive this to front-wheel maybe this to trailing wheel.

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