Borg-warner Automotive, K.k.

Borgwarner Inc.

Hiroyuki Takeda

Kensuke Nakamura

Akio Matsuda

Tetsuji Kotera

Shinji Tsuruta

Naoji Sakamoto

Sadao Kojima

Hiroyoshi Mitsuhashi

Hajime Maeda

Akira Terao

Masashi Yamada

A silent chain comprises a plurality of link plates, each having a pair of tooth parts and pin holes, stacked in the thickness direction as well as in the length direction and linked together using linking pins. Guide links are provided on the outermost sides of the link plates and are press-fit to the ends of linking pins. The guide links and link plates are relatively positioned to reduce wear on a chain guide surface by causing either the guide links or the link plates to substantially contact the guide surface.

Silent chain

A blade tensioner of a blade tensioner system for a chain that drivingly connects a drive shaft to a driving shaft in an engine, that improves the chain-damping efficiency in a blade tensioner applied to the chain within an engine, prevents the sideways tilt of the blade tensioner during operation, in a blade tensioner applied to the chain in an engine, and provides a blade tensioner with a functionality that allows it to transversely guide a chain along the chain sliding face in a blade shoe, while maintaining the flexural deformability (i.e., the flexibility) of the blade shoe.

Blade tensioner and system for a chain

A low noise chain drive of this invention includes toothed sprockets and an endless silent chain having sets of link plates successively connected for articulation by means of connecting members. Each set has a plurality of transversely aligned link plates with each having a pair of link plate teeth designed to engage the sprocket and a pair of openings through which the connecting members are inserted. The link plate teeth are defined by an outside flank and an inside flank. The sprocket has sprocket teeth defined by a sprocket tooth flank. The sprocket tooth flanks and the outside flanks are profiled such that the outside flanks have a swelling located between the tip of the link plate tooth and a point that is in contact with the sprocket tooth after the completion of the engagement. The swellings are formed such that when one link plate set rotates around a rotational axis relative to the preceding set having completed the engagement with the sprocket, the swellings of the one link plate set project outwardly from a circle defined by the minimum radius centering on the rotational axis and osculating the sprocket tooth flank to be meshed with the outside flank located on the trailing side of the one link plate set. The link plate teeth stay in sliding contact at their outside flanks with the sprocket teeth from the beginning of their engaging process through its completion to thereby ease engagement impacts and noises.

Low noise chain drive

Growing community of inventors

Nabari, Japan

Hiroyuki Takeda