Leverage for reducing gear rack transmission backlash

Abstract

The invention provides leverage for reducing gear rack transmission backlash, comprising a rack, a gear, a gear transmission motor and a reducer. The invention is characterized in that a lever bracket is fixedly arranged on a moving body; one end of a lever is installed on the lever bracket via a plug; the gear is installed on an output shaft of the reducer which is installed in the middle part of the lever; the gear transmission motor is connected with the reducer; a through hole is arranged on the other end of the lever; screws are arranged in the through hole in series; a lever compression spring is sheathed on the screw and the lever is fixed on the moving body. The lever is arranged on the moving body of the invention and the assembly of the motor, the reducer and the gear is arranged on the lever; the lever only has one rotational degree of freedom around the plug axes and the gear installed on the lever is pressed toward the rack by the compression spring at the other end of the lever, therefore, the distance between the gear and the rack is shortened to the minimum, thereby reaching the aim of reducing the backlash of mutually meshed gear and rack and finally playing a role in reducing the backlash.

Description

(1) Technical field [0001] The invention relates to a lever mechanism, in particular to a lever mechanism for reducing backlash in rack and pinion drives. (2) Background technology [0002] Due to manufacturing and installation errors, as well as to compensate for thermal deformation and provide space for storing lubricating oil, the rack and pinion meshing needs to leave a minimum backlash; the traditional method is to use double-plate gears to control the gap to reduce the rack and pinion meshing The method of empty return, this method of reducing empty return increases the processing cost and installation cost, and the double-plate gear must be adjusted regularly according to the usage; another common method is to design and process the gear shaft of the installed gear as an eccentric shaft, through The relative position of the gear and the rack is controlled to control the backlash, thereby effectively reducing backlash, but the structure of the eccentric shaft is diffic...

AI Technical Summary

Problems solved by technology

[0002] Due to manufacturing and installation errors, as well as to compensate for thermal deformation and provide space for storing lubricating oil, the rack and pinion meshing needs to leave a minimum backlash; the traditional method is to use double-plate gears to control the gap to reduce the rack and pinion meshing The method of empty return, this method of reducing empty return increases the processing cost and installation cost, and the double-plate gear must be adjusted regularly according to the usage; another common method is to design and process the gear shaft of the installed gear as an eccentric shaft, through Control the relative position of the gear and the rack to control the backlash, so as to effectively reduce the backlash, but the structure of the eccentric shaft is difficult to ensure the mutual position for a long time under the condition of variable load

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