Sprocket for chain

Abstract

The invention provides a sprocket for a chain which can reduce vibration and noise generated when the chain and the sprocket are meshed, and can standardize smooth meshing and separating between the chain and the sprocket, by optimizing tooth profile and tooth profile pitch angle of the sprocket. In the sprocket (100) for the chain, the teeth (105) have a plurality of different pitch angles. The teeth having the plurality of different pitch angles are irregularly arranged and have tooth number of the teeth (105L) of tooth profile pitch angle which is bigger than the tooth profile pitch angle of standard sprocket, more than the tooth number of the teeth (105S) of tooth profile pitch angle which is smaller than the tooth profile pitch angle of standard sprocket.

Description

technical field [0001] The present invention relates to a sprocket for a chain, which has tooth grooves that are continuous at the tooth bottoms of opposing tooth surfaces, a plurality of teeth formed between adjacent tooth grooves, rollers of roller chains or sleeves of bushing chains. The sprocket for a chain with spline meshing can reduce vibration and noise generated when the rollers of the roller chain or the bushes of the bush chain mesh with the teeth of the sprocket, and can perform meshing and disengagement smoothly. Background technique [0002] Chain transmissions in which power is transmitted by running a chain over at least two sprockets on the driving side and the driven side have been widely used, and it is desired to reduce noise levels in various applications. [0003] Especially in automobile engines, transmissions for transmitting the rotation of the crankshaft to the camshaft, etc. are required to have high combustion efficiency and high output power due ...

AI Technical Summary

Problems solved by technology

Therefore, there are problems such as vibration and noise depending on the number of teeth

[0029] In addition, in the low-noise chain transmission disclosed in Patent Document 1, the tangent to the roller at the position where the roller abuts against the tooth surface of the sprocket and the straight line connecting the center of the roller and the center of the sprocket The formed angle is formed as a small angle, which can elastically deform the roller and / or the tooth surface, and make the roller sit on the bottom of the tooth or slide on the tooth surface or move to its vicinity, so that the rolling can be eased. The impact of the tooth surface of the roller and the sprocket when meshing reduces the meshing noise, but on the opposite side, the rollers mesh with each other in a state of being sandwiched between the tooth surface facing the tooth bottom side in a wedge shape, so when the roller chain moves from the chain The meshing and separation side of the wheel hinders the smooth meshing and separation of the roller and the tooth surface of the sprocket, which causes the chain to vibrate, causing noise problems instead

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