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Method for improving contact ratio of internal gearing cycloidal gears

A cycloid gear and coincidence technology, applied in the direction of components with teeth, belts/chains/gears, portable lifting devices, etc. The effect of improving the bearing capacity and increasing the degree of coincidence

Active Publication Date: 2015-12-30
MILITARY TRANSPORTATION UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The common tooth profile curves such as traditional cycloid, involute and circular arc generally have a coincidence degree within 4. According to past experience and methods, it is difficult to greatly improve the coincidence degree

Method used

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  • Method for improving contact ratio of internal gearing cycloidal gears
  • Method for improving contact ratio of internal gearing cycloidal gears
  • Method for improving contact ratio of internal gearing cycloidal gears

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Experimental program
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Embodiment

[0067] According to the above design scheme, if the number of external teeth z of gear 1 is taken 1 =112, the number of internal teeth of gear 2 z 2 =120, Then there is R=115.8966, t 2 = 1.0477, ε = 20.0098. For standard involute gears (α=20°, c * =0.25), if the various interference problems are not considered for the time being, the coincidence degree is Among them, α is the meshing angle, α a1 is the addendum pressure angle of gear 1, α a2 is the addendum pressure angle of gear 2, r b1 is the radius of the base circle of gear 1, r b2 is the radius of the base circle of gear 2. In comparison, the coincidence degree of the cycloid tooth profile is more than 10 times that of the standard involute tooth profile with similar parameters and dimensions. This shows that the cycloid-based tooth profile can greatly improve the coincidence of the internal gear transmission.

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Abstract

The invention provides a method for improving the contact ratio of internal gearing cycloidal gears. The method includes the following steps: during intermeshing engaging-out between an external gear and an internal gear, setting the diameter of the engaging circle during engaging-out to be a value between that of the pitch circle of the external gear and that of the pitch circle of the internal gear, so as to ensure that the tooth crest of the external gear is meshed with that of the internal gear; during intermeshing engaging-in between the external gear and the internal gear, setting the diameter of the engaging circle during engaging-in to be the difference value between that of the pitch circle of the internal gear and that of the engaging circle during engaging-out, so as to ensure that the tooth root of the external gear is meshed with the tooth crest of the internal gear.

Description

technical field [0001] The invention relates to a method for improving the coincidence degree of an inner meshing cycloid gear. Background technique [0002] Internal gear transmission has the characteristics of small structure size, low sliding coefficient, high transmission efficiency, small contact stress, high bending strength, strong bearing capacity, long service life and stable transmission, so it is widely used in planetary gear transmissions. With the rapid development of modern science and technology and industrial and agricultural production, the demand for gears is increasing day by day, and the requirements for its transmission are also significantly improved, and it is developing in the direction of high speed, heavy load, miniaturization, low vibration and noise. [0003] As one of the important indicators to measure the gear transmission performance, the coincidence degree is an important condition for the continuous and stable operation of the gear pair, and...

Claims

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Application Information

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IPC IPC(8): F16H55/08F16H55/17
CPCF16H55/08F16H55/17F16H2055/176
Inventor 贵新成詹隽青李立顺李红勋冯晓梅朱海天
Owner MILITARY TRANSPORTATION UNIV PLA
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