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Anti-backlash transmission comprising trochoid gears and roll pins with conical teeth

A technology for trochoidal racks and transmissions, which is applied to transmissions, friction transmissions, hoisting devices, etc., which can solve problems such as wear, reduced service life of racks, and inability to eliminate backlash, achieving good interchangeability , Low maintenance cost effect

Inactive Publication Date: 2013-04-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device solves the problems of low transmission precision of reciprocating motion of involute rack drive, high noise of reciprocating motion, serious wear and other problems, but the special treatment of the tooth root space increases the manufacturing difficulty, and leads to the shape and size of the rack at the tooth root Stress concentration occurs due to rapid changes, which reduces the service life of the rack; in addition, in view of the inseparability of the cycloid transmission, the center distance between the roller and the rack cannot be changed once it is determined, so during the transmission process, due to the wear and tear of the rolling pin and the rack The resulting backlash cannot be eliminated, and the transmission accuracy can only be verified by replacing the rolling pin after the backlash occurs

Method used

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  • Anti-backlash transmission comprising trochoid gears and roll pins with conical teeth
  • Anti-backlash transmission comprising trochoid gears and roll pins with conical teeth
  • Anti-backlash transmission comprising trochoid gears and roll pins with conical teeth

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Embodiment approach 1

[0020] Such as Figure 5 As shown, the rolling pin gear B is the driving part, and the trochoidal rack A is the driven part. The rolling pin gear B connected to the motor performs a rotary motion, and the trochoid rack A meshing with the rolling pin gear B performs a linear motion, thereby realizing the conversion of the motion form. The scope of rights of the present invention is not limited thereto and there may be the contrary.

[0021] During the installation process, a slight preload should be ensured between the trochoidal rack A and the pin gear B to achieve zero backlash in meshing, and the magnitude of the preload should be recorded as the predetermined preload. When there is backlash due to wear during the transmission process, push the rolling pin gear B towards the small end of the rolling pin until the pressure between the trochoidal rack A and the rolling pin gear B reaches the predetermined pre-tightening force, so that the trochoidal rack The backlash between...

Embodiment approach 2

[0023] Such as Figure 6 As shown, the two parallel pin gears B are the driving parts, and the trochoidal rack A is the driven part. When the two rolling pin gears B connected to the motor perform synchronous rotary motion, the trochoid rack A meshing with the two rolling pin gear B performs linear motion respectively, thereby realizing the conversion of the motion form. The scope of rights of the present invention is not limited thereto and there may be the contrary.

[0024] During the installation process, it should be ensured that there is a slight pre-tightening force between the two rows of trochoidal racks A and the rolling pin gear B, so as to achieve zero backlash in the meshing, and record the size of the pre-tightening force as the predetermined pre-tightening force. tension. When backlash occurs due to wear during the transmission process, push the two pin gears B to the small end of the pin respectively until the pressure between the two rows of trochoidal racks...

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Abstract

The invention relates to an anti-backlash transmission comprising trochoid gears and roll pins with conical teeth, and belongs to the technical field of mechanical transmission. The anti-backlash transmission mainly comprises a pin gear and a trochoid rack, and a rack pair consisting of the pin gear and the trochoid rack realizes movement transmission. Working tooth profiles of teeth of the trochoid rack are flat trochoid internal equidistant lines, and each tooth has a certain conical degree along the tooth width direction. The pin gear meshed with the trochoid rack is provided with a plurality of roll pins, and conical degrees of the roll pins are identical to a conical degree of the rack. The anti-backlash transmission has the advantages that the anti-backlash transmission is good in interchangeability, low in maintenance cost, high in transmission precision and long in service life, backlash is prevented in a meshing procedure, tooth gaps caused by abrasion in a transmission procedure can be compensated, smooth transition between clockwise rotation and anticlockwise rotation can be realized, and the like.

Description

technical field [0001] The invention relates to a backlash-eliminating conical gear pin-trochoid rack transmission device, belonging to the technical field of mechanical transmission. Background technique [0002] Due to the needs of production technology, it is often necessary to convert rotary motion into reciprocating linear motion, or convert linear motion into rotary motion. Usually, a rack and pinion transmission pair is used to realize the mutual conversion of the two forms of motion. [0003] Rack transmission is a transmission form that converts rotary motion and linear motion through the meshing of gears and racks. There are two main types of racks currently used in rack drives: straight racks and helical racks. They are paired with involute spur gears and involute helical spur gears respectively. When the straight rack and gear mesh, there is impact, the degree of coincidence is small, and the transmission is not stable; when the helical rack and gear mesh, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H19/04F16H55/18F16H55/10F16H55/28
Inventor 李剑锋罗平张化波范金红马春敏
Owner BEIJING UNIV OF TECH
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