本发明涉及机械传动变速机构，特别是一种基于圆柱凸轮的高精度变速机构，由一圆柱形套筒、在该圆柱形套筒外径上套置的与其呈动配合的两个圆柱凸轮-主动凸轮和从动凸轮、在该圆柱形套筒的内径上套置的与其呈动配合的滑动环和固设在滑动环上的4个拨销组成；当主动凸轮旋转时，使穿置在主动凸轮上的拨销沿着主动凸轮上的螺旋线导槽滑动，同时拨销被限制在圆柱形套筒上的直线导槽内作直线运动，从而带动滑动环作直线运动，进而通过穿置在从动凸轮上的拨销沿从动凸轮上的螺旋线导槽上滑动，使从动凸轮作旋转运动。本机构具有结构紧凑，使用灵活，工作可靠的优点。

贾继强 [+1] [-1]

中国科学院长春光学精密机械与物理研究所

长春菁华专利商标代理事务所 22210 [+1] [-1]

JIQIANG JIA [+1] [-1]

CHANGCHUN OPTICS FINE MECH

The invention relates to a mechanical transmission speed-change mechanism, in particular to a cylindrical cam based high-precision speed-change mechanism, which consists of a cylindrical sleeve, two cylindrical cams, a slip ring and four pulling pins, wherein the two cylindrical cams comprising a driving cam and a driven cam are sleeved on the external diameter of the cylindrical sleeve and are in movable fit with the cylindrical sleeve, the slip ring is sleeved on the inside diameter of the cylindrical sleeve and is in movable fit with the cylindrical sleeve, and the four pulling pins are fixedly arranged on the slip ring. When the driving cam rotates, the pulling pins which are inserted into the driving cam slide along a spiral guide groove on the driving cam, meanwhile the pulling pins are limited in a linear guide groove on the cylindrical sleeve to do linear motion so as to drive the slip ring to do linear motion, and the pulling pins which are inserted into the driven cam slide along a spiral guide groove on the driven cam so as to do rotary motion. The mechanism has the advantages of compact structure, flexible usage and reliable work.

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