UNIVERSAL SPEED REDUCER WITH ECCENTRIC ENGAGEMENT PAIR

摘要

A universal speed reducer with an eccentric engagement pair is provided. The reducer comprises: a housing (4), a power input shaft (1) and a power output shaft (2). The power input shaft is fixedly provided with an eccentric sleeve (3) in the circumferential direction. A transmission tooth disk (5) is rotatably provided outside of the eccentric sleeve. Engagement teeth (51) of the transmission tooth disk are engaged with engagement tooth grooves (6) on the housing in an one-to-one manner. An inner gear (52) of the transmission tooth disk is engaged with an outer gear (91) on the power output shaft in a small teeth difference manner. The power input mechanism according to the invention employs an engagement pair without tooth difference, similar to the spline engagement, thus, the relative rotation speed between the engagement tooth grooves and the engagement teeth is zero, and the spinning motion of the transmission tooth disk is filtered. Therefore, the high-frequency wave generated during the transmission of the reducer with small teeth difference in the prior art can be filtered, useless additional motion is avoided, the transmission efficiency is improved, and the motion is smoothly and unhinderedly output. The invention has fewer parts than the cyclonical pinwheel reducer in the prior art, simple and compact structure, small size and low cost.