Method for adjusting backlash between pinion and rack in rack-pinion drive

A driving device, pinion technology, applied in the direction of transmission, friction transmission, transmission parts, etc.

Pending Publication Date: 2022-04-15
GUDEL GROUP AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the actual backlash of a gearbox can be much smaller than that indicated by the accuracy class, ...

Method used

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  • Method for adjusting backlash between pinion and rack in rack-pinion drive
  • Method for adjusting backlash between pinion and rack in rack-pinion drive
  • Method for adjusting backlash between pinion and rack in rack-pinion drive

Examples

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Embodiment Construction

[0078] figure 1 is a schematic diagram of a rack-pinion drive according to the present invention. The rack-pinion drive comprises a rack 10 meshing with a pinion 20 . Pinion 20 is driven by a motor-gearbox assembly 30 comprising an electric drive motor and a planetary gearbox. In such a known manner, the motor-gearbox assembly 30 is mounted on a carriage 40 (as a carrier for the motor-gearbox assembly), movable linearly on linear guides 45 along the toothed rack 10 . The motor-gearbox assembly 30 is mounted to the bracket through a positioning mechanism 42 , which can precisely position the assembly in a radial position relative to the rack 10 . A suitable positioning mechanism 42 includes an eccentric support for the motor-gearbox assembly 30, wherein the motor-gearbox assembly 30 is rotated at an angle corresponding to the radial adjustment distance to achieve precise radial adjustment. As mentioned above, such mechanisms are disclosed in WO2017 / 216306A1 (Güdel Group). I...

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Abstract

The invention relates to a method for adjusting the backlash between a pinion (20) and a rack (10) in a rack-pinion drive. A motor-gearbox assembly (30) including a motor and a gearbox is supported on the bracket (40) by a positioning mechanism (42) for precisely positioning the assembly (30) in a radial position relative to the rack (10). In the method, the assembly (30) is positioned at a first radial distance from the rack (10) by means of a positioning mechanism (42), and a first circumferential backlash between the pinion (20) and the rack (10) at a first position of the pinion (20) along the rack (10) is determined from measurements taken on the input side of the gearbox. The assembly (30) and/or the rack (10) is then positioned to a second position of the pinion (20) along the rack (10), the second position being different from the first position, and a second circumferential backlash between the pinion (20) and the rack (10) at the second position is determined from measurements taken on the input side of the gearbox. A minimum circumferential backlash is determined as a function of the determined first circumferential backlash and the determined second circumferential backlash (and possibly further measurements), and a radial adjustment distance is determined as a function of the determined minimum circumferential backlash. Finally, the motor-gearbox assembly (30) is repositioned in the radial direction towards the rack (10) by means of a positioning mechanism (42) as a function of the determined radial adjustment distance.

Description

technical field [0001] The present invention relates to a method for adjusting the backlash between a pinion and a rack in a rack-and-pinion drive, a motor being operatively connected to the pinion through a gearbox, comprising a motor and a motor of the gearbox- The gearbox assembly is supported on the carrier by a positioning mechanism for precisely positioning the assembly in a radial position relative to the rack. The invention also relates to a rack and pinion drive and a software product for implementing the method. Background technique [0002] Rack and pinion drives have been known for decades to achieve precise positioning along linear axes. For accurate positioning without having to employ a feedback loop but instead relying on position measurements to correct position along a linear axis, backlash in the drive system must be minimized. It includes minimizing backlash in the components of the drive system, especially the gearbox and motor. It also includes fine ...

Claims

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Application Information

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IPC IPC(8): F16H55/28F16H57/12F16H19/04
CPCF16H57/12F16H2057/125F16H19/04F16H55/28F16H2057/123F16H2019/046
Inventor 沃尔特·祖洛夫斯蒂芬·鲍曼克里斯托夫·阿克曼
Owner GUDEL GROUP AG
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