Tsubakimoto Chain Company

Takeo Sasaki

Toshifumi Sato

Kosuke Fujishima

Takashi Tohara

Shuji Hamaguchi

Provided is a chain power transmission mechanism and a silent chain each having a simple configuration, easy to manufacture, and capable of reducing noise in the entire chain power transmission mechanism. Link plates of the silent chain include an inner-flank-engagement link plate which engages with a sprocket in an inner flank engagement mode and an outer-flank-engagement link plate which engages with the sprocket in an outer flank engagement mode. The inner-flank-engagement link plate and the outer-flank-engagement link plate are arranged such that combinations of the link plates at positions where engagement with and disengagement from a plurality of the sprockets are synchronized include a combination in which at least one of the link plates is different in engagement mode from another link plate.

Chain power transmission mechanism and silent chain

A simple-structured, easy-to-produce chain drive mechanism is provided, which can reduce the overall noise level irrespective of chain length or rpm, while suppressing noise and vibration caused by tension fluctuations and maintaining durability and service life. The engagement/seating mode between a silent chain and a driving sprocket is one of inside-flank engagement/inside-flank seating, inside-flank engagement/outside-flank seating, outside-flank engagement/inside-flank seating, and outside-flank engagement/outside-flank seating. The engagement/seating mode between the silent chain and a driven sprocket is one of inside-flank engagement/inside-flank seating, inside-flank engagement/outside-flank seating, outside-flank engagement/inside-flank seating, and outside-flank engagement/outside-flank seating. The engagement/seating mode between the chain and the driving sprocket is different from that between the chain and the driven sprocket.

Chain drive mechanism

An object of the present invention is to provide a silent chain which suppresses vibration and undulation while maintaining rigidity, strength, and durability and simplifying a shape of a pin hole without using a locker pin with a special shape and special material. In a silent chaina guide rowmade up of guide platesand a middle plateand a non-guide row mademade up of inner platesare alternately connected in a chain longitudinal direction by a pair of locker pinsandPin holesandrespectively have outer peripheral side straight portionsandand inner peripheral side straight portionsandwhich are formed parallel to each other.

Silent chain

An object of the present invention is to provide a silent chain and a silent chain transmission device which stabilize chain behavior during chain travel to suppress an occurrence of tooth skipping and to reduce a string vibration sound and a meshing noise with simple configurations. In a silent chain, a pin holeof an inner plateand a pair of locker pinsare configured in such a size that a gap is formed between a seat surfaceand a back surface of a short pinin a state where the pair of locker pinsare in contact with each other on rolling surfacesand

Silent chain and silent chain transmission device

There is provided a silent chain that is reduced in weight and widthwise size by reducing the length of a short pin while preventing the occurrence of excessive stress concentration in the short pin of a rocker pin including a long pin and the short pin. The short pin of the rocker pin extends through all plates of the guide row and all plates of the non-guide row in the width direction. The short pin is provided with a first stopper, and a second stopper. A first end surface of the short pin is prevented from being positioned in a first adjacent pin hole by contact between the first stopper and the first contact portion, and a second end surface of the short pin is prevented from being positioned in a second adjacent pin hole by contact between the second stopper and the second contact portion.

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Osaka, Japan

Takeo Sasaki