Globoidal cam indexing device for realizing large indexing number

Abstract

The invention relates to a globoidal cam indexing device for realizing a large indexing number. The globoidal cam indexing device mainly comprises an indexing box, an input shaft, an output shaft, a globoidal cam body which is fixedly connected onto the input shaft, and an indexing plate component which is fixedly connected onto the output shaft. Roller axes in the indexing plate component are all intersected with an axis of an indexing plate; the input shaft and the output shaft are perpendicular in a staggered manner; lobe crests on a cam body are meshed with rollers in the indexing plate component and comprise four stages, namely a first stopping stage, a first indexing stage, a second stopping stage and a second indexing stage; the profiles of the lobe crests of the two indexing stages are variable lead spiral lobe crests; the first stopping stage is a circular lobe crest; and the second stopping stage comprises two circular lobe crests. In the rotating process of the cam body by a circle, the indexing plate generates indexing rotation for two times and stopping for two times; in addition, an index angle of the output shaft at each time is one half of a central angle between every two rollers, i.e., the indexing number is equal to twice a roller number; and the large indexing number can be realized without changing the geometrical size of the indexing plate.

Description

technical field [0001] The invention relates to an intermittent transmission device, in particular to an arc cam indexing device for realizing a large index number, and belongs to the field of mechanical technology. Background technique [0002] The arc cam indexing device is mainly composed of an arc cam body and an indexing plate with rollers. The cam pushes the rollers on the indexing plate to convert the continuous rotation of the cam into periodic intermittent motion of the indexing plate. . Because of its small impact and vibration, stable and reliable operation, and good dynamic characteristics, the arc cam indexing device is often used in high-precision indexing mechanisms and high-speed automatic machines. At present, in the arc cam indexing mechanism on the market, during each indexing process, the rotation angle of the indexing plate is equal to the central angle between the rollers, that is, the number of indexing is equal to the number of rollers. When the num...

AI Technical Summary

Problems solved by technology

In this way, for a multi-station production line, the number of rotations of the cam needs to be equal to the number of rollers, and the indexing efficiency is low, which affects the production speed and economic benefits of the production line

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