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Involute gear

A technology of involute gears and involutes, which is applied to belts/chains/gears, components with teeth, portable lifting devices, etc., and can solve problems such as tooth top interference of paired gears

Active Publication Date: 2014-04-23
CRRC QISHUYAN INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working tooth profile of the involute gear participating in the meshing is an involute, and the transition curve of the dedendum below the involute is a cycloid transition curve. The shape of the transition curve is one of the key factors affecting the bending strength of the gear. Therefore, the gear teeth The transition curve of the root needs to have a larger radius of curvature to enhance the bending strength of the gear. However, if the radius of curvature of the transition curve is too large, it will cause the tooth tip interference of the paired gear

Method used

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Examples

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Embodiment 1

[0039] This embodiment provides an involute gear, such as figure 1 As shown, the working tooth profile of the gear tooth is involute 1, the part below the working tooth profile of the gear tooth is the dedendum transition curve 4, the dedendum transition curve 4 is the elliptical arc transition curve AB, and the elliptical arc transition The starting point A of the curve AB is the starting point A of the involute on the working tooth profile of the gear tooth, and the straight line OA formed by the starting point A of the involute and the center point O of the gear is tangent to the elliptical arc transition curve AB at point A;

[0040] The end point B of the elliptical arc transition curve AB is located on the tooth groove, which is the intersection point B of the symmetry line OB of the tooth groove of the gear and the dedendum circle.

[0041] The above-mentioned elliptical arc transition curve AB is determined by the following method:

[0042] First, according to the tra...

Embodiment 2

[0058] This embodiment provides an involute gear, such as figure 1 As shown, the working tooth profile of the gear tooth is involute 1, the part below the working tooth profile of the gear tooth is the dedendum transition curve 4, the dedendum transition curve 4 is the elliptical arc transition curve AB, and the elliptical arc transition The starting point A of the curve AB is the starting point A of the involute on the working tooth profile of the gear tooth, and the straight line OA formed by the starting point A of the involute and the center point O of the gear is tangent to the elliptical arc transition curve AB at point A;

[0059] The end point B of the elliptical arc transition curve AB is located on the tooth groove, which is the intersection point B of the symmetry line OB of the tooth groove of the gear and the dedendum circle.

[0060] The above-mentioned elliptical arc transition curve AB is determined by the following method:

[0061] First, according to the tra...

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Abstract

The invention provides an involute gear. The working tooth profile of the involute gear is a standard involute, the part, below the working tooth profile, of the tooth root transition curve is an elliptic arc transition curve, and the curvature radius of the elliptic arc transition curve is greater than that of a traditional tooth root transition curve. According to the involute gear, the elliptic arc transition curve is taken as the tooth root transition curve, so that the gear has higher tooth root bending strength while tooth crest interference of the gear is prevented.

Description

technical field [0001] The invention belongs to the technical field of mechanical gears, in particular to an involute gear. Background technique [0002] Involute gears can transmit constant speed, are not sensitive to center distance errors, and are easy to process, so most gears currently use involute gears. The working tooth profile of the involute gear participating in the meshing is an involute, and the transition curve of the dedendum below the involute is a cycloid transition curve. The shape of the transition curve is one of the key factors affecting the bending strength of the gear. Therefore, the gear teeth The transition curve of the root needs to have a larger radius of curvature to enhance the bending strength of the gear. However, if the radius of curvature of the transition curve is too large, it will cause the tooth tip interference of the paired gear. Contents of the invention [0003] In view of the above-mentioned defects in the prior art, the object of...

Claims

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Application Information

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IPC IPC(8): F16H55/17F16H55/08
CPCF16H55/0806F16H55/17
Inventor 颜力吴全衡刘忠伟
Owner CRRC QISHUYAN INSTITUTE CO LTD
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