Gear wheel with changed tooth height

A technology of changing tooth height and gears, applied in belts/chains/gears, components with teeth, portable lifting devices, etc., to achieve the effect of improving bending bearing capacity, reducing noise, and protecting machine tools

Inactive Publication Date: 2008-05-21
宝钢苏冶重工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] The technical problem to be solved by the present invention is to propose a variable tooth height gear for the above shortcomings of the existing technology without changing the existing technological means and processing conditions, so as to significantly improve the coincidence degree of the end faces of the meshing gears and the bearing capacity. ability to reduce operating noise

Method used

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  • Gear wheel with changed tooth height
  • Gear wheel with changed tooth height
  • Gear wheel with changed tooth height

Examples

Experimental program
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Effect test

Embodiment 1

[0111] This embodiment is a pair of carburized and quenched ground gears. The parameters are: modulus m=5mm, number of teeth z1=29, z2=89, center distance a’=325mm, helix angle β=22.5°, addendum height coefficient han * =1, headspace coefficient C n * = 0.4, the displacement coefficient x1 of the pinion = 0.572, the displacement coefficient of the large gear x2 = 0.6289, the tooth width b = 125mm, the following steps can be followed to design a variable tooth height gear:

[0112] (1) Calculate the gear parameters and related values ​​of the original standard size. Get:

[0113] The pitch circle diameters of small and large gears d1=156.947mm, d2=481.665mm;

[0114] Addendum circle diameter of small and large gears da1=172.046mm, da2=497.333mm;

[0115] The dedendum circle diameters of small and large gears df1=148.667mm, df2=473.954mm;

[0116] The usable involute height h of the pinion produced by processing the rack tool with the addendum height coefficient of 1 F1 =9.4...

Embodiment 2

[0145] This embodiment is a pair of quenched and tempered hobbing gears, the parameters are: modulus m=9mm, number of teeth z1=18, z2=70, center distance a’=415mm, helix angle β=10°, addendum height coefficient han * =1, headspace coefficient C n * = 0.25, the displacement coefficient x1 of the pinion = 0.722, the displacement coefficient of the large gear x2 = 0.8627, the tooth width b = 190mm, the following steps can be followed to design a variable tooth height gear:

[0146] (1) Calculate the gear parameters and related values ​​of the original standard size. Get:

[0147] The pitch circle diameters of small and large gears d1=164.499mm, d2=639.719mm;

[0148] Addendum circle diameter of small and large gears da1=192.754mm, da2=670.505mm;

[0149] The dedendum circle diameters of small and large gears df1=154.995mm, df2=632.747mm;

[0150] The usable involute height h of the pinion produced by processing the rack tool with the addendum height coefficient of 1 F1 =16....

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Abstract

The invention relates to a gear with inconstant addendum and belongs to the technical field of mechanical transmission. The gear is provided with gear teeth uniformly distributed on the circumference of the gear. Involute profiles are arranged on both sides of the gear teeth. The relation between the addendum ha of the basic tooth profile of the gear and the modules of the gear is that ha is more than or equal to 1.05 m and is less than or equal to 1.25 m. The structure of the invention is improved based on the prior science; the action line length is improved by about 15 percent; the touch carrying capacity is improved by more than 10 percent; the bending carrying capacity is improved by 5 percent to 9 percent; the noise is significantly reduced on the premise that the material cost of the gear is hardly increased; the cutter of the gear is not changed; the process is not changed; the difficulty of the manufacture is not improved basically. Accordingly, the invention has remarkable substantial characteristics and remarkable improvement.

Description

technical field [0001] The invention relates to a gear, especially an improvement of an involute gear, and belongs to the technical field of mechanical transmission. Background technique [0002] Involute gear is the most widely used gear in various gear transmissions. Since the 1980s, hardened gears with carburized and quenched teeth have gradually replaced normalized or quenched and tempered hobbed soft and medium hardened gears, which has become the main trend of today's gear technology development. . [0003] The basic parameters of involute gears include pressure angle, addendum height coefficient, top clearance coefficient, addendum fillet coefficient, etc. In order to unify the cutting tools, there are standards for the basic tooth profile of involute gears both at home and abroad. For gears with pressure angles of 20° and 25°, the head clearance coefficient and addendum fillet coefficient may vary, but the addendum height coefficients are all equal to 1. For gear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/17F16H55/08
Inventor 李钊刚
Owner 宝钢苏冶重工有限公司
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