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Electronic-control backlash eliminating gear pair with variable tooth thickness

A variable-tooth-thickness gear and electronically controlled technology, which is applied in the field of variable-tooth-thickness gear meshing pairs, can solve problems such as difficult adjustment of spring preload, high requirements for control synchronization, and complex structure and assembly. The effect of reducing backlash and backlash, low synchronization requirements, and simple structure

Inactive Publication Date: 2015-07-15
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The backlash mainly affects the accuracy of gear transmission; in the prior art, in precision gear transmission, in order to realize backlash-free transmission and adjust meshing backlash, commonly used backlash adjustment methods include: eccentric bushing adjustment center distance method, spring force bias method, spring-loaded scissor gear, dual-motor-driven double-transmission chain anti-backlash method, auxiliary torque motor loading method, etc., the above-mentioned gap adjustment methods or existing structure and assembly are relatively complicated, and are only applicable to low-power systems, often only It can eliminate the shortcomings of a certain constant hysteresis; or it has the disadvantages of occupying a large space and wasting driving energy; for example, the dual-motor-driven double-drive chain anti-backlash method and the auxiliary torque motor loading method introduce motors for gap adjustment. The backlash effect is relatively ideal, but the cost is high, and the requirements for the control system are also relatively high. The double-drive anti-backlash method driven by dual motors takes up a relatively large space, and has high requirements for control synchronization, and increases the driving energy.
[0005] The simpler method is to use variable-tooth-thickness cylindrical gears plus spring gap adjustment, etc., through the pre-tightening force of the springs, the gears can move axially to a certain extent, eliminating the tooth backlash, which has a high impact on the machining accuracy of the gears. Requirements, it is difficult to adjust the size of the spring preload

Method used

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  • Electronic-control backlash eliminating gear pair with variable tooth thickness
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Embodiment Construction

[0024] figure 1 It is the structural principle diagram of the first embodiment of the present invention, as shown in the figure: the electronically controlled anti-backlash variable tooth thickness gear pair in this embodiment includes the variable tooth thickness gear I1 and the variable tooth thickness gear meshed with the variable tooth thickness gear I1 gear II2 and an electronically controlled anti-backlash system, the electronically controlled anti-backlash system at least includes an electronically controlled power device 4 that applies an axial mechanical force for adjusting the backlash to the variable-tooth-thickness gear I1 or / and the variable-tooth-thickness gear II2, and the backlash-adjusting The direction of the axial mechanical force is the direction of eliminating the backlash between the variable tooth thickness gear I1 and the variable tooth thickness gear II2, that is, the direction of the axial mechanical force of the gap adjustment is the direction in whic...

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Abstract

The invention discloses an electronic-control backlash eliminating gear pair with variable tooth thickness. The gear pair comprises a tooth thickness variable gear I, a tooth thickness variable gear II and an electronic-control backlash eliminating system, wherein the tooth thickness variable gear II is meshed with the tooth thickness variable gear I, the electronic-control backlash eliminating system comprises at least an electronic-control power device used for exerting backlash-regulating axial mechanical force on the tooth thickness variable gear I and the tooth thickness variable gear II, and the direction of the backlash-regulating axial mechanical force is a direction for backlash elimination between the tooth thickness variable gear I and the tooth thickness variable gear II. According to the gear pair, real-time control of axial displacement is achieved through electronic control, then the tooth backlash can be regulated in real time according to backlash regulation requirements, the response is rapid, the transmission accuracy is improved, the volume is small, the structure is simple, the synchronism requirement for control is low, the cost is low, the assembling requirements are easy to satisfy, the tooth backlash and the return difference can be eliminated or reduced timely, the transmission error during reversing can be reduced, therefore the operation and the control are simple and fast, and high adaptability is provided at occasions with high requirements for the integral structure.

Description

technical field [0001] The invention relates to a variable tooth thickness gear meshing pair, in particular to a variable tooth thickness gear meshing pair used for backlash elimination by external mechanical force. Background technique [0002] Gear transmission is used for the transmission of motion and force between two shafts. Compared with other mechanical transmission methods, gear transmission has stable motion, compact structure, low noise and high transmission efficiency. It is widely used in various machines and instruments. Applications. [0003] With the development of science and technology and production technology, as well as people's high-quality requirements for various products, especially the development of precision transmission, higher and higher requirements are put forward for the adjustment and control of transmission accuracy and backlash. [0004] The backlash mainly affects the accuracy of gear transmission; in the prior art, in precision gear tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/12F16H1/04
Inventor 王光建
Owner CHONGQING UNIV
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