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Backlash elimination structure for gear drive mechanism

A technology of gear transmission mechanism and tooth side clearance, which is applied in the direction of metal processing machinery parts, metal processing, metal processing equipment, etc., can solve the problem of affecting the rotation accuracy and repeat positioning accuracy of the machine tool, the increase of the gear tooth side clearance, and the impact on the machining accuracy of the machine tool and other problems, to achieve the effect of eliminating gear backlash, eliminating lateral backlash, improving rotary positioning accuracy and repeat positioning accuracy

Active Publication Date: 2014-04-30
WUHU HENGSHENG HEAVY MACHINE TOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the error generated by the gear during processing and the friction during operation will increase the backlash of the gear, which will affect the rotation accuracy and repeat positioning accuracy of the machine tool, thereby affecting the machining accuracy of the machine tool

Method used

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  • Backlash elimination structure for gear drive mechanism
  • Backlash elimination structure for gear drive mechanism
  • Backlash elimination structure for gear drive mechanism

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Embodiment Construction

[0019] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0020] Such as figure 1 The structure of the present invention shown is a gear transmission mechanism for eliminating backlash, which is applied to a multi-stage gear transmission mechanism for driving a CNC heavy-duty rotary table, including an input shaft (axis I), an input shaft gear 1, an output shaft axis (VI axis, V axis) and central axis 9 (IV axis); the multi-stage gear transmission mechanism drives the large ring gear 14 of the working mechanism. When the table of the machine tool is rotating (B axis), it adopts a gear ring gear transmission mechanism.

[0021] In order to solve the problems existing in the prior art and ...

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Abstract

The invention discloses a backlash elimination structure for a gear drive mechanism. Two output shafts include a first output gear shaft and a second output gear shaft, wherein the first output gear shaft is provided with a first driven bevel gear, and the second output gear shaft is provided with a second driven bevel gear. Output gears on the first output gear shaft and the second output gear shaft are engaged with a big gear ring, two driving bevel gears with opposite helical directions are arranged on a center shaft, the first driven bevel gear and the second driven bevel gear are engaged with the two driving bevel gears respectively, and an axial position adjusting structure is arranged on the center shaft. By the aid of the technical scheme, the big gear ring is driven by two small drive gears, the backlash of the gears is eliminated in a preloaded manner by staggering the double gears, operation and speed regulation are facilitated, the backlash of the gears can be effectively eliminated, and rotary positioning precision and repeated positioning precision of a gear machine tool are improved, so that machining precision of the machine tool is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing machine tools, and relates to a transmission mechanism of a numerically controlled heavy-duty machine tool. More specifically, the invention relates to a tooth side clearance elimination structure of a gear transmission mechanism. Background technique [0002] The rotary table of the CNC heavy-duty machine tool adopts the gear and ring gear transmission mechanism. That is, the large ring gear is set on the workbench of the machine tool, and the driving gear on the output shaft of the reduction mechanism meshes with the large ring gear. When working, the large ring gear is driven by the driving gear, so as to realize the rotary motion of the worktable for cutting. [0003] However, the error generated during the processing of the gear and the friction during the operation will increase the backlash of the gear, which will affect the rotation accuracy and repeat positioning accuracy o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q5/56
CPCB23Q5/48B23Q5/56
Inventor 胡子俊杨荷妹蒋政武孔令凤
Owner WUHU HENGSHENG HEAVY MACHINE TOOL
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