FUNCTION-ORIENTED ACTIVE TOOTH SURFACE

DESIGN OF SPIRAL BEVEL GEARS

CAO Xuemei¹  FANG Zongde¹  ZHANG Jinliang¹  DENG Xiaozhong²

(1. School of Mechatronics, Northwestern Polytechnical University, Xi’an 710072;
2. School of Mechanical & Electronical Enginerring, Henan University of Science & Technology, Luoyang 471039)

Abstract: Transmission errors and contact pattern have determinative effects on the gearing performances of a gear drive, so a new approach for design of spiral bevel gears is proposed, based on a predesigned parabolic function of transmission errors with limited magnitude of maximal transmission errors and a predesigned linear function of contact path. This approach is based on three meshing points. By controlling their magnitudes of transmission errors and the positions on the tooth surface, the allover control of engagement quality is realized. The advantages of the function-oriented active tooth surface design are the reduction of level of noise and the obtaining of favorable shape and dimensions of contact pattern, and moreover, the gearing performance in whole tooth contact could be controlled directly in design. The goals are achieved by application of local synthesis algorithm, local conjugate theory and machining principle of spiral bevel gears. Function-oriented active tooth surface design provides an innovative designing approach for the spiral bevel gears and is quite important for the gears in high speed, heavy duty or with special requirements.

Key words: Spiral bevel gears Transmission errors Contact pattern Function-oriented design

CLC No: TH132.4

航空科学基金(04C53015)和国家自然科学基金(50475148)资助项目. Received 20060825, received in revised form 20070326