Abstract

Reasonable size accuracy of the mechanical part may be a key for the design of the complex transmission mechanism; thus, it is very important to evaluate the size errors of each part. Taking the conjugate cam-spatial rank feeding transmission mechanism as an example, the functions, such as the near-dwelling, fast-forwarding, working feeding, slow-forwarding, far-dwelling, fast-returning, quick-feeding-back, and slow-returning, are realized with the appropriate conjugate cam governing equations. The analytical expressions of the conjugate cams and functions of the angular motion and angular velocity between the conjugate cam and crank are derived. Considering the real machining errors of part, a concept of parameter sensitivity is proposed, and the magnitude and direction of the influence of typical parameter errors on the mechanism motion transfer characteristics are evaluated by this concept. This method provides a reliable reference for the precision design of mechanical structure parameters.

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