Double-face driving silent chain and silent chain power transmission device using the same

Abstract

A double-sided drive silent chain is provided wherein the dimensions of each inner link plate of the outer drive link row to its rear face are equal to or greater than the dimensions of each link plate of the inner drive link row. The inner face of the back of the inner link plate thus bears against the sides of the inner drive sprocket and guides and prevents the silent chain from meshing with the sprocket in a twisting manner. When viewed from the side, all the link plates have the same shape except the inner link plate of the outer drive link row, and the outermost link plate of the inner drive link row is thinner than the other link plates.

Description

technical field [0001] The present invention relates to a double-sided drive silent chain in which sprockets are engaged inside and outside an endless silent chain, and a double-side drive silent chain transmission device using the same. Background technique [0002] Recently, it has been proposed to use a silent chain as a timing chain for transmitting the rotation of an engine crank to a camshaft and a shaft of auxiliary equipment such as an oil pump. For this reason, Japanese patent publications 3,182,387 and 3,122,058 have proposed a double-sided drive silent chain, wherein a plurality of link plates on the left and right ends of the silent chain form an outer drive chain ring row, and its sprockets face the side of the chain. outside, and multiple chain plates positioned between the outer drive chain plates form an inner drive chain row with the teeth facing the inside of the chain. [0003] Japanese Patent Publication No. 3,182,387 filed by the present applicant has p...

AI Technical Summary

Problems solved by technology

As a result, assembling such a silent chain is laborious

The strength of the entire silent chain is weakened because the inner link plate is formed such that the primary teeth face inward (inner peripheral side) and the secondary teeth face outward (outer peripheral side), so that the cross-sectional area of ​​its central portion is small, thereby Reduces its tensile strength and is also due to the fact that such inner link plates are arranged in rows (courses) on the side with fewer link plates, in which one is alternately connected to the other by pins

Also, since the chainring plate of the outer drive chainring row consists of shorter secondary teeth, it may not fully mesh with the sprocket, resulting in misalignment of the sprockets and premature wear of the tooth flanks

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