Silent chain

Abstract

The present invention provides a silent chainwhich can reduce the impact when the teeth of the inner dentate sclerite and the middle dentate sclerite, etc. contact with the teeth of a sprocket wheel for starting engaging and reduce the impact soundand alleviate the impact between the impact pin and the pin hole when the engagement is started for prolonging the service life of the chain.According to the silent chain, the connecting pins (10) are respectively inserted into each pin hole (3, 6) of inner dentate sclerite and middle dentate sclerite which are respectively arranged to non-guiding line JL and guiding line GL for connecting.The pin holes of each inner dentate sclerite (2) are elongated pin holes (3) which extend to the inner side direction,and the distance between the centers of adjacent connecting pins is a same chain reference pitch P at a state that the chain is tensioned and expands linearly and straightly.The inner dentate sclerite and the middle dentate scierite start to engage with the teeth of the sprocket wheel through the inner parts (4a, 7a) and contact with the base through the outer parts (4b, 7b).

Description

technical field [0001] The invention relates to a silent chain used as a timing transmission system of an engine and a transmission mechanism of an ordinary machine, in particular to the ability to reduce the contact between the teeth of the inner or middle gears constituting the silent chain when the silent chain meshes with the sprocket Silent chain with a rattling sound when the sprockets make contact. Background technique [0002] Generally, in a silent chain, the inner and middle gears with a pair of pin holes and a pair of teeth (double-strand teeth) are arranged as a plurality of non-guiding rows and guiding rows, respectively, and are arranged on the outermost side of the guiding rows A guide piece with a pair of pin holes, the inner tooth pieces arranged as a non-guiding row and the middle tooth pieces arranged as a guide row are combined into a cross shape in a single or multiple stacked manner, and the pin holes of the guide piece will be inserted into the guide p...

AI Technical Summary

Problems solved by technology

[0014] Therefore, it cannot adapt to the current trend of requiring silent chains to be more silent

[0015] In addition, since there is no gap between the connecting pin 28 and the pin holes 22 and 24 to relax the contact shock, there is a problem that the shock at the start of meshing acts on the connecting pin 28 and the pin holes 22 and 24, resulting in a decrease in the life of the chain.

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