Cycloidal gear tooth profile correction method, cycloidal gear and RV (rotary vector) reducer

Abstract

The invention relates to the field of processing of cycloidal gears, in particular to a cycloidal gear tooth profile correction method, a cycloidal gear and an RV (rotary vector) reducer; a main operating area of each tooth of the cycloidal gear is located mainly between the root and crest of the tooth close to its middle, and the root and crest are non-principal operating areas. The method of the invention imparts a second-order or higher-order parabolic relationship the correction amount of the tooth profile and a normal distance from a standard cycloidal gear node to a meshing point of a standard cycloidal gear and pin wheel, the correction amount decreases gradually from the crest and root to the middle main operating area, a certain meshing clearance is generated in the non-principal operating areas and forms a lubricating clearance, and the main operating area has small correction amount so that it is ensured that the main operating area attaches to the standard cycloidal gear tooth profile to the maximum extent; during transmission in no-load state, only one pair of teeth are involved in meshing transmission; after loading, the cycloidal gear and the pin wheel deform slightly under stress, multiple pairs of teeth are involved in meshing, meshing contact ratio is increased, and the transmission is more stable.

Description

technical field [0001] The invention relates to the field of cycloid wheel processing, in particular to a method for modifying the tooth profile of a cycloid wheel, a cycloid wheel, and an RV reducer. Background technique [0002] The key component of the RV reducer is the cycloid pin wheel planetary gear system, and the accuracy of the cycloid gear in the cycloid pin wheel planetary gear system directly determines the performance of the RV reducer. [0003] In the process of cycloid wheel processing, firstly, a coordinate system must be established, with the geometric center of the cycloid wheel as the origin, the axis that passes through the origin and coincides with the symmetry axis of the cycloid wheel is selected as the Y axis, and the axis that passes through the origin and is perpendicular to the Y axis is X shaft, the tooth profile equation of the standard cycloidal wheel is: [0004] [0005] In the formula: X, the horizontal axis coordinate of the cycloid gear...

AI Technical Summary

Problems solved by technology

In the actual manufacturing process, there are machining errors and assembly errors in the parts, and the cycloid wheel and the pin wheel will also produce elastic deformation after the wheel train is loaded. If the standard cycloid wheel and the pin wheel are used to mesh, on the one hand, the assembly Interference is easy to occur during the transmission process, resulting in difficult assembly. On the other hand, during the transmission process, there will be a problem of poor lubrication due to the lack of clearance between the tooth profile of the cycloidal wheel and the pin wheel, which will affect the service life of the reducer. Serious Even stuck

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