A design method of a sheave mechanism with evenly distributed grooves and unevenly distributed pins

Abstract

The invention discloses a method for designing a sheave mechanism with evenly distributed grooves and unevenly distributed pins. The number m of round pins distributed unevenly on the circumference; then calculate the index angle 2β of the dial rotation angle 2α for each movement of the sheave, and the distance b from the center of the dial to the center of the round pin; S2, determine the uneven distribution of grooves in the sheave mechanism The parameters that the pin must meet; S3, determine the angle between two adjacent round pins: calculate the center angle between two adjacent round pins γ 1 , γ 2 ,…, γ m , according to the difference in the center angle between two adjacent round pins on the dial, the sheave mechanism can realize multiple dynamic stop ratios in one rotation cycle of the dial. According to the difference in the central angle between two adjacent round pins on the dial, the present invention realizes the setting of evenly distributed grooves and unevenly distributed pins, so that the sheave mechanism can make the sheave realize multiple different dynamic movements within one dial cycle. The stop ratio improves the application range of the sheave mechanism.

Description

technical field [0001] The invention relates to the field of design methods of a sheave mechanism, in particular to a design method of a sheave mechanism with uniformly distributed grooves and unevenly distributed pins. Background technique [0002] The Geneva Drive is a one-way intermittent motion mechanism composed of a driving dial equipped with cylindrical pins, a sheave and a frame, also known as the Malta mechanism. It is often used to convert the continuous rotation of the active part into a one-way periodic rotation with pauses of the driven part. There are external Geneva mechanism and internal Geneva mechanism, both of which are used for intermittent transmission between parallel shafts, but the former is opposite to the direction of the dial, while the latter is The steering is the same, but in the prior art most of the round pins on the dial of the sheave mechanism are evenly distributed, and at the same time, this kind of sheave mechanism can only produce a sta...

AI Technical Summary

Problems solved by technology

There are external Geneva mechanism and internal Geneva mechanism, both of which are used for intermittent transmission between parallel shafts, but the former is opposite to the direction of the dial, while the latter is The steering is the same, but in the prior art most of the round pins on the dial of the sheave mechanism are evenly distributed, and this kind of sheave mechanism can only produce a stable dynamic-to-stop ratio in one dial cycle, which limits its application scope

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