motorcycle engine chain tensioner

Abstract

The invention discloses a motorcycle engine chain tensioner, which belongs to the technical field of motorcycle power transmission. The utility model solves the problems that the existing motorcycle engine chain tensioner cannot maintain a consistent tension of the chain, and the working noise of the motorcycle is large. The motorcycle engine chain tensioner includes a hollow tensioner body, a push rod arranged in the body, and a push rod anti-retraction mechanism arranged between the push rod and the body, and the outer end of the push rod protrudes from the outside of the body. , the inner end is located in the body, the body is provided with a spring, the spring has a winding portion wound into several turns and a free end, the free end is fixed in the body, and the outer peripheral surface of the winding portion elastically The top is pressed against the inner end of the push rod. The utility model can keep the tension of the chain consistent during the working process of the motorcycle and effectively reduce the working noise of the motorcycle. In addition, the entire tensioner has a simple structure and is convenient for assembly.

Description

technical field [0001] The invention relates to a tensioning device, in particular to a tensioner used for tensioning the chain of a motorcycle engine. Background technique [0002] The power of the motorcycle engine is generally transmitted through a belt or chain. Due to the rotation fluctuation of the engine, the chain will elongate and cause slack in the process of transmitting power, which is the reason for the abnormal valve timing and noise of the motorcycle engine. The chain tensioner can keep the chain properly tensioned to prevent the above situation. [0003] The structure of the existing motorcycle engine chain tensioner mainly includes a cylindrical tensioner body, and a push rod consisting of a screw rod and a screw sleeve is arranged in the body. One end of the screw sleeve extends out of the body, and the other end is connected to the Screw threaded connection located inside the body. There is also a mainspring or torsion spring in the body. The potential ...

AI Technical Summary

Problems solved by technology

At the beginning, the thrust on the ejector rod is the largest, but as the length of the ejector rod protruding out of the body becomes longer, the thrust on the ejector rod gradually decreases, which makes the tensioner unable to keep the chain consistent during the working process tension

[0005] 2. Since the thrust of the ejector rod is released by the spring or spring and then converted into thrust through the threaded pair of the ejector rod, the thrust is lost due to the influence of the manufacturing accuracy and friction of the threaded pair; plus the reason for the first item, the thrust Extremely unstable, with a large fluctuation range (generally up to 30% to 50%), which makes the motorcycle work louder

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