CN205315633U - Mechanical type indexing mechanism - Google Patents

Abstract

The utility model relates to a mechanical transmission mechanism, which is mainly composed of a spring (1), a rack (2), a gear (3), a one-way bearing (4), and a dial (5). The movement of the mechanical device Divided into advance movement and return movement. ①Propelling movement: The driving force acts on the rack (2), and the downward linear movement of the rack (2) will drive the gear (3) to rotate, and the gear (3) is in interference fit with the outer ring of the one-way bearing (4). At the same time, the one-way bearing (4) is driven to rotate, and the one-way bearing (4) drives the index plate (5) to rotate in one direction to realize the effect of indexing. The greater the linear movement distance of the rack (2), the greater the indexing angle; ② Return movement: Remove the external force acting on the rack (2), and under the action of the spring (1), the rack (2) moves in the opposite direction , drives the gear (3) to rotate in reverse, the outer ring of the one-way bearing (4) only rotates in reverse with the gear (2), and the dial (5) remains stationary. This mechanical indexing mechanism can achieve continuous indexing on the same workbench, and the structure is simpler and more compact.

Description

A mechanical indexing mechanism

technical field

The utility model relates to a mechanical transmission mechanism, in particular to a mechanical indexing mechanism.

Background technique

Indexing mechanisms are widely used in machinery, electronics, printing, pharmaceuticals and other automated machinery. There are many types of indexing mechanisms, such as: ratchet mechanism, sheave mechanism, incomplete gear mechanism, pinwheel mechanism, cam mechanism, etc. Among them, The cam indexing mechanism is the most widely used, because the cam-type intermittent transmission mechanism is simple in structure, can be positioned automatically, and the dynamic and static ratio can be selected arbitrarily. It has the characteristics of high speed, high indexing accuracy, and low impact noise. However, this kind of indexing mechanism generally has defects: the power input shaft rotates a circle, and the output determines the indexing index angle according to the number of stations, which can only achieve a single indexing; when manually inputting power, the power input generally needs to be equipped with With a hand crank handle, the structure is not compact enough. The utility model provides an indexing mechanism, which breaks through the limitation that the traditional cam indexing mechanism can only input power in the entire circumferential direction and single indexing. The power input is changed to a linear direction, and the structure is simpler and more compact. Can be graduated continuously. The utility model has practical significance to the research and design of the indexing mechanism.

Utility model content

The utility model aims at the shortage that the currently commonly used cam indexing mechanism can only input power in the entire circumferential direction, and the indexing angle is single. The utility model provides an indexing mechanism to solve the above problems.

The technical scheme adopted to realize the above-mentioned purpose is:

The mechanical mechanism of the utility model is mainly composed of spring (1), rack (2), gear (3), one-way bearing (4), indexing plate (5), and five parts. The movement of the mechanical device is divided into propulsion Movement and return movement. Propelling motion: the driving force acts on the rack (2), and the downward linear motion of the rack (2) will drive the gear (3) to rotate, and the gear (3) is in interference fit with the outer ring of the one-way bearing (4). The one-way bearing (4) is driven to rotate, and the one-way bearing (4) drives the index plate (5) to rotate in one direction to realize the effect of indexing. The greater the linear movement distance of the rack (2), the greater the indexing angle; Return movement: remove the external force acting on the rack (2), and under the action of the spring (1), the rack (2) moves in the reverse direction, driving the gear (3) to rotate in the opposite direction, and the outer bearing (4) The ring only rotates in the opposite direction with the gear (2), and the indexing plate (5) remains stationary.

According to the above principles, the core technology of the reciprocating motion of the utility model is the one-way bearing (4). A one-way bearing is a bearing that can rotate freely in one direction and is locked in the other direction. The metal shell of the one-way bearing contains many rollers, needle rollers or balls, and the shape of the rolling pocket makes it only roll in one direction, while generating great resistance in the other direction.

The beneficial effect of the utility model is that: the power input of the indexing mechanism is in a straight line direction, continuous indexing can be performed on the same workbench, the rotating device for driving force is omitted, and the structure is simpler and more compact. The utility model has practical significance to the research and design of the indexing mechanism.

Description of drawings

Fig. 1 is the structural representation of the utility model

Fig. 2 is a schematic diagram of a three-dimensional model of the utility model

Among the figure: 1. spring, 2. rack, 3. gear, 4. one-way bearing, 5 dials.

detailed description

Fig. 1 and Fig. 2 are respectively a structural schematic diagram and a three-dimensional model diagram of a mechanical indexing mechanism structure of the utility model, which mainly consists of a spring (1), a rack (2), a gear (3), and a one-way bearing (4), indexing plate (5), composed of five parts, the movement of the mechanical device is divided into advance movement and return movement. Propelling motion: the driving force acts on the rack (2), and the downward linear motion of the rack (2) will drive the gear (3) to rotate, and the gear (3) is in interference fit with the outer ring of the one-way bearing (4). The one-way bearing (4) is driven to rotate, and the one-way bearing (4) drives the index plate (5) to rotate in one direction to realize the effect of indexing. The greater the linear movement distance of the rack (2), the greater the indexing angle; Return movement: remove the external force acting on the rack (2), and under the action of the spring (1), the rack (2) moves in the reverse direction, driving the gear (3) to rotate in the opposite direction, and the outer bearing (4) The ring only rotates in the opposite direction with the gear (2), and the indexing plate (5) remains stationary.

The main features of this kind of mechanical indexing mechanism are: the power input is in a straight line direction, continuous indexing can be performed on the same workbench, the rotating device for driving force is omitted, and the structure is simpler and more compact.

Claims (2)

1. A mechanical indexing mechanism, the indexing mechanism is mainly composed of five parts: spring (1), rack (2), gear (3), one-way bearing (4), and indexing plate (5) , its main features are: the indexing structure drives the one-way movement of the index plate (5) through the meshing of the rack (2) and the gear (3), wherein the one-way bearing (4) and the gear (3) are interference fit . 2. The mechanical indexing mechanism according to claim 1, characterized in that: the bottom end of the rack (2) is connected to the spring (1), and the spring (1) is in a slightly compressed state in the non-working state.