Transmission Error in Helical Timing Belt Drives (Case of a Period of Pulley Pitch)

Author:

Kagotani Masanori1,Ueda Hiroyuki1,Koyama Tomio2

Affiliation:

1. Department of Mechanical Engineering, Osaka Sangyo University, 3-1-1, Nakagaito, Daito-shi, Osaka, 574-8530 Japan

2. Department of Mechanical Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka, 535-8585 Japan

Abstract

Helical timing belts have been developed in order to reduce the noise that occurs when conventional timing belts are driven. Helical timing belts are characterized by synchronous rotation. Although several studies have been performed to clarify the noise characteristics and belt life of helical timing belts, the transmission error of these belts remains unclear. In the present study, the transmission error having a period of one pitch of the pulley was investigated both theoretically and experimentally for helical timing belt drives. Experimental conditions were such that the transmission force acts on the helical timing belts under quasi-static conditions and the belt incurs belt climbing at the beginning of meshing and at the end of meshing. Experimental results obtained for the transmission error agreed closely with the computed results. The computed results revealed that helical timing belts can be analyzed as a set of very narrow belts for which the helix angle is zero. The transmission error was found to decrease when the helix angle or the belt width increase within a range defined such that the face advance is less than one belt pitch. In addition, there exists an appropriate installation tension that reduces the transmission error.

Publisher

ASME International

Subject

Computer Graphics and Computer-Aided Design,Computer Science Applications,Mechanical Engineering,Mechanics of Materials

Reference10 articles.

1. Ueda, H., Kagotani, M., Koyama, T., and Nishioka, M., 1999, “Noise and Life of Helical Timing Belt Drives,” ASME J. Mech. Des., 121, No. 2, pp. 274–279.

2. Ueda, H., Kagotani, M., and Koyama, T., 1999, “Side Tracking of Helical Timing Belt Drives (In Case of No Load),” Proceedings of the 4th World Congress on Gearing and Power Transmission, 2, pp. 1349–1356.

3. Kagotani, M., Ueda, H., and Koyama, T., 1999, “Transmission Error in Helical Timing Belt Drives (Effect of Belt Side Tracking),” Proceedings of the 4th World Congress on Gearing and Power Transmission, 2, pp. 1327–1336.

4. Koyama, T., Kagotani, M., Shibata, T., Sato, S., and Hoshiro, T., 1981, “A Study on Strength of Toothed Belt (6th report, Behavior of Belt and Pulley Teeth at Incomplete Meshing Region),” Bull. Jpn. Soc. Mech. Eng.,24, No. 194, pp. 1500–1506.

5. Gerbert, B. G., 1992, “Driven Pulley Jumping of Timing Belts,” ASME Proceedings of the 1992 International Power Transmission and Gearing Conference, DE-Vol. 43-2, pp. 489–493.

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