Design, construction and instrumentation of a machine to measure tension and impact forces in roller chain drives

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Abstract

Most previous experimental investigations of chain drive dynamics have been completed on the classical four-square test machine (also referred to as a chain speeder in the industry). In this paper we discuss the design and construction of a new test machine configuration that offers some advantages over the traditional design. The new machine and attendant instrumentation provide more realistic chain loading, and allow link tension and roller-sprocket impact monitoring during normal operation. The incorporation of an idler sprocket allows independent adjustment of test span length and preload. The angle at which rollers approach an instrumented sprocket can also be adjusted. Drawbacks of the new configuration (compared to the four-square design) are that the support structure may not be as rigid and the additional sprockets (idler sprocket and instrumented sprocket) add kinematic complexity.

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    This paper is based on the Ph.D. dissertation research conducted by the first author under the direction of the second author at Vanderbilt University, completed in December 1989.

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