| Cycloid pin gear planet transmission is characterized by large bearing capacity, high driving efficiency, light weight, compact design, small size, etc. As a kind of planet transmission, it possesses broad application foreground. Both cycloid pin gear planet transmission and involute few teeth difference planetary transmission belong to K-H-V planet gear transmission, their principle and structure is almost identical. The only difference between them is that the profile curve of cycloid pin gear planet transmission is not involute but medial isometric curve of variable amplitude epicycloids (where isometric curve of curtate epicycloid is used even common); and the conjugated curve between center gear and above curve is circle. Cycloid pin gear planet mechanism is a kind of special speed reducer with larger reduction ratio; its intermeshing tooth profiles of inner and outer gear are cycloid and circle separately. It has been widely used in different mechanical transmission.This paper studies new structure of auto-adjusting cycloid pin gear planet transmission to solve the problem that the meshing gap can not adjust automatically in the common cycloid pin gear planet transmission. Based on the structure design, the dynamical simulation of this new structure has been performed, and its motion characteristic is inwestigated. In conclusion, this paper has obtained the following results:①Cycloid profile parameterization design based on cycloid pin gear planet transmission theory has been realized by programming, furthermore, the profile generated by the software has been verified by motion simulation software.②A new innovative design method is presented to improve the situation that the meshing gap which leads to inefficient precision transmission can not adjust automatically in the common cycloid pin gear planet transmission. In this new structure, the interface between cycloid gear and ring pin gear has made to be cone, when the transmission gap increases, the gap will be adjusted automatically and the transmission accuracy will be improved becase of the axial displacement of conical ring pin gear which is generated by spring force.③3D geometry model of auto-adjusting cycloid pin gear speed reducer has been build and its assembly verification has been performed.④The engineering design of auto-adjusting cycloid pin gear speed reducer has been given, and so did its transmission efficiency calculation and its 2D engineering drawings.⑤Dynamical simulation model of auto-adjusting cycloid pin gear planet transmission has been build, and its simulation results have shown the transmission performance of auto-adjusting cycloid pin gear planet speed reducer. |
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