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Involute gear tooth profile modification method, modified tooth profile and application of method

A technology of involute gears and involutes, applied in belts/chains/gears, components with teeth, hoisting devices, etc., can solve the problems of contact deformation of gear teeth and unimproved contact stress, and achieve stable improvement. stability, improve service life, and ensure the effect of stability

Active Publication Date: 2014-05-28
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, this scheme fails to make a smooth transition between the modification curve and the addendum, so that the contact deformation and contact stress of the teeth during meshing and meshing are still not improved

Method used

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  • Involute gear tooth profile modification method, modified tooth profile and application of method
  • Involute gear tooth profile modification method, modified tooth profile and application of method
  • Involute gear tooth profile modification method, modified tooth profile and application of method

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Firstly, it is demonstrated that the contact stress of the modified gear is smaller than that of the unmodified one.

[0031] figure 1 Among them, the solid line is the tooth profile of the traditional involute gear, and the dotted line is the tooth profile of the gear modified by the curve of the present invention. According to the Hertz contact theory, the gear contact can be approximated as the contact of two cylindrical surfaces with parallel axes, figure 1 The tooth top of the driving wheel with the solid line tooth profile is in contact with the tooth surface of the driven wheel a...

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Abstract

The invention discloses an involute gear tooth profile modification method. The method is characterized in that addendum modification is performed on a driving wheel and a driven wheel which are mutually meshed, so that the tooth surface and the addendum of a gear are in transition by a formed modification curve; the modification curve is tangent to a non-modified involute of the tooth surface and the addendum, and the smooth transition of the tooth surface and the smooth transition of the modification curve and the addendum are ensured, so contact deformation and contact stress during the meshing-in and meshing-out of gear teeth are improved. The invention further discloses a tooth profile and the gear which are obtained by the method, and the application of the method. By adopting the method, the smooth transition of the tooth surface and the smooth transition of the modification curve and the addendum are ensured, so that the meshing-in and meshing-out impact of the gear is reduced, the transmission stability is ensured, the vibration and noise reduction of a gear system is benefited, and the service life of the gear is prolonged.

Description

technical field [0001] The invention relates to a gear tooth profile modification, in particular to a tooth profile modification curve of a spur gear. Background technique [0002] Involute gears inevitably have meshing and meshing shocks, load mutations, speed fluctuations, and vibrations of different formations and frequencies in the transmission process, resulting in reduced transmission accuracy, shortened service life, reduced load-carrying capacity and increased vibration. For the bad phenomenon of noise, from the perspective of reducing the impact of meshing and meshing and improving the stability of transmission, the tooth profile of the gear must be modified. [0003] Tooth profile modification refers to the proper modification of the involute near the top or root of the meshing gear teeth to compensate for machining errors and elastic deformation, and to avoid or reduce the load impact generated when meshing in and out. Since the pressure angle of the tooth profil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/08
CPCF16H55/0806F16H55/088
Inventor 胡友民樊继开吴波贾广飞谢锋云李延磊刘颉朱曾辉袁志鹏
Owner HUAZHONG UNIV OF SCI & TECH
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