Ball type indexing mechanism of arc cam

Abstract

The invention relates to a ball type indexing mechanism of an arc cam, which comprises an input shaft, an output shaft, an arc cam, an indexing disk, a spherical roller and a spherical roller, wherein the arc cam is sleeved on the input shaft, the indexing disk is meshed with the arc cam through the spherical roller on the output shaft; a dual-arc rolling track meshed with the spherical roller is arranged on the arc cam. As the cam rolling track adopts the change of the dual-arc section and the spherical base structure of the indexing disk, the contact among the spherical roller, the cam and the indexing disk is changed to be spot contact, the movement axis of the spherical roller is not restricted, and the gliding friction is changed to be rolling friction so as to enable the wearing capacity to be small, and the accuracy and controllability of the movement rule of a load disk are improved.

Description

technical field [0001] The invention relates to a ball-shaped cam indexing mechanism, which belongs to the technical field of machinery. Background technique [0002] Cylindrical roller arcuate indexing cam mechanism is the most commonly used arcuate indexing cam mechanism at present. In the cylindrical roller arc surface indexing cam mechanism, the cylindrical roller has a fixed axis relative to the index plate, and theoretically the instantaneous contact line between the cylindrical roller and the arc cam is a spatial curve, and the relative speeds of each point on the contact line are different. , causing relative sliding between the cam and the roller, resulting in uneven wear and reduced transmission efficiency. The point meshing processing technology reduces the surface constraints and line constraints between transmission pairs to point constraints as much as possible, which can reduce the constraints between transmission pairs and reduce the sensitivity of the mecha...

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