A stepped chain transmission device capable of protecting the chain

Abstract

The invention discloses a step chain transmission device capable of protecting chains, and relates to the technical field of transmission devices. The step chain transmission device comprises a driving cone pulley, a driven cone pulley, a tensioning device, a first spherical pin assembly, a second spherical pin assembly and the chains, wherein the chains are surrounded on the driving cone pulley,the driven cone pulley and the tensioning device; the driving cone pulley comprises a plurality of driving chain wheels which are coaxially arranged; the driven cone pulley comprises a plurality of driven chain wheels which are coaxially arranged, the first spherical pin assembly is used for installing the driving cone pulley and the driven cone pulley on a transmission shaft, the second sphericalpin assembly is used for installing the tensioning device on the tensioning shaft, and parallel adjusting mechanisms are arranged between every two adjacent driving chain wheels and the two adjacentdriven chain wheels and are used for adjusting the parallelism between two adjacent driving chain wheels or two adjacent driven chain wheels, so that a user can select any transmission ratio; and thedriving chain wheels and the driven chain wheels are all located on the same plane, so that the service life of the chains is long, and the fault occurrence rate is low.

Description

technical field [0001] The invention relates to the technical field of transmission devices, in particular to a stepped chain transmission device capable of protecting a chain. Background technique [0002] Stepped chain transmission is often used to adjust the speed. By changing the size of the two sprockets connected by the chain, the transmission ratio of the chain transmission can be changed, and then the speed can be adjusted. When the transmission ratio is adjusted (such as the outermost of the two cone wheels and the innermost of the other cone wheel), the two sprockets will not be on the same plane. At this time, the working state of the chain belongs to the space surface, which will affect the outer surface of the chain. Many parts such as the inner plate, the sleeve, the pin shaft and the roller are worn out. After a long time, the gap increases, which is easy to cause failures such as tooth loss and skipping, which affects the normal use of the chain. [0003] Th...

AI Technical Summary

Problems solved by technology

[0002] Stepped chain transmission is often used to adjust the speed. By changing the size of the two sprockets connected by the chain, the transmission ratio of the chain transmission can be changed, and then the speed can be adjusted. When the transmission ratio is adjusted (such as the outermost of the two cone wheels and the innermost of the other cone wheel), the two sprockets will not be on the same plane. At this time, the working state of the chain belongs to the space surface, which will affect the outer surface of the chain. Many parts such as the inner plate, the sleeve, the pin shaft and the roller are worn out. After a long time, the gap increases, which is easy to cause failures such as tooth loss and skipping, which affects the normal use of the chain.

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