Novel arc chain and chain wheel

Abstract

The invention discloses a novel arc chain, which comprises an inner sheet, an outer sheet, a pin shaft and an anti-abrasion inner pipe, wherein the inner sheet is triangular and is provided with a peripheral angle and a periphery; two connection through holes are formed in the inner sheet and are respectively positioned at positions of the inner sheet, which are close to the first peripheral angle and the second peripheral angle; the edge of each peripheral angle is an arc section; a weight reduction hole is formed in the inner sheet; a transition section is reserved between the first peripheral angle and the second peripheral angle of the inner sheet; the middle of the transition section is a straight line, and two sides are arc lines; the outer sheet is square and is provided with included angles and sides; two connection holes are formed in the outer sheet and are positioned at the first included angle and the second included angle of the outer sheet; the edge of each included angle is an arc section; the side between the first included angle and the second included angle and the side between the third included angle and the fourth included angle are inwards sunken arc transitions; sludge removal holes are formed in the outer sheet and are opposite to tooth tops of a chain wheel; the outer sheet is flush with the top of the inner sheet; the inner sheet is higher than the outer sheet; and the anti-abrasion inner pipe has a seamless structure.

Description

technical field [0001] The invention belongs to the technical field of transmission devices, and in particular relates to a novel circular arc chain and a sprocket. Background technique [0002] The chain is mainly composed of an inner piece, an outer piece and a pin shaft. The power transmission is completed by meshing with the sprocket or gear. The existing chain can form line contact or point contact with the sprocket or gear, resulting in insufficient meshing firmness. , the chain is easy to fall off from the sprocket or gear, and the friction is very loud. Simultaneously, because the contact surface of line contact or point contact is small, the contact point is easy to wear and tear, and affects the service life of chain, sprocket or gear. [0003] The patent with the notification number "CN201772018U" discloses a toothed chain used in motorcycle power transmission. Located near the first peripheral corner and the second peripheral corner of the inner sheet, the inne...

AI Technical Summary

Problems solved by technology

However, the patent still has the following problems: 1. The arc transition between the first peripheral angle and the second peripheral corner of the inner sheet is easy to cause stress concentration; 2. The third included angle and the fourth included angle of the outer sheet are Two sharp corners are likely to cause rupture and damage to other parts near the tooth chain; 3. During use, sand and sand will enter the gap between the tooth chain and the sprocket, increasing the roughness between the tooth chain and the sprocket. Increased wear on toothed chains and sprockets

However, the patent still has the following problems: after the chain has been used for a period of time, the chain will be deformed and slightly longer than the original length, and the guide boss can only play a guiding role when it is located in the gap between the two inner pieces. After a while, the guide boss is no longer located in the gap between the two inner plates, but is in contact with the inner plates, which is prone to tooth skipping and breakage; the tooth slots and tooth tops of the sprocket do not adopt circular arc transitions but obtuse angle transitions , during the movement, the obtuse angle will hinder the movement of the inner piece, and the obtuse angle will cause greater friction with the inner piece, which will accelerate the wear of the inner piece, accompanied by a large abnormal sound

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