High-abrasion-resistance small-tooth-number driving chain wheel

Abstract

The invention discloses a high-abrasion-resistance small-tooth-number driving chain wheel. The tooth number of the chain wheel is 15-16; the pressure angle of the involute profile of the driving chain wheel is 30-33 degrees; the involute of the driving chain wheel which is meshed with a tooth chain working chain plate is 0.52-1.26 millimeters in length; and the modulus of the involute profile of the driving chain wheel is 2.021-1.989. In the high-abrasion-resistance small-tooth-number driving chain wheel, a novel design is adopted for the tooth form of the small-tooth-number chain wheel, the chain wheel tooth form parameters are changed, and the tooth form meshing contact area of a chain wheel involute is increased, so that the transmission efficiency and abrasion resistance are improved; and moreover, the modulus and pressure angle of the chain wheel involute tooth form can be adjusted through an optical design, so that the requirement of high abrasion resistance under different working conditions of different host machines is met. As proved by an experiment, the abrasion resistance of the high-abrasion-resistance small-tooth-number driving chain wheel is improved by over 5 times in comparison to an ordinary small-tooth-number driving chain wheel.

Description

technical field [0001] The invention belongs to a toothed sprocket of a vehicle transmission mechanism, in particular to a driving sprocket with high wear resistance and small number of teeth. Background technique [0002] Toothed chain transmission is widely used in high-speed transmissions such as automobiles and motorcycles. Toothed chain transmission transmits power through the tooth shape of the toothed chain plate meshing with the tooth shape of the sprocket. During the transmission process, since the friction times of the teeth of the driving sprocket are twice that of the camshaft sprocket, and the contact area between the teeth of the driving sprocket and the tooth profile of the chain plate is small, the tooth profile of the driving sprocket is often worn Seriously, the wear and tear of the toothed chain transmission will fail. At present, in order to improve the wear resistance of the toothed chain transmission, the sprocket is often manufactured by selecting hig...

AI Technical Summary

Problems solved by technology

During the transmission process, since the friction times of the teeth of the driving sprocket are twice that of the camshaft sprocket, and the contact area between the teeth of the driving sprocket and the tooth profile of the chain plate is small, the tooth profile of the driving sprocket is often worn Severe, make toothed chain transmission wear and tear invalid

At present, in order to improve the wear resistance of the toothed chain transmission, the sprocket is often manufactured by selecting high-quality materials, optimizing heat treatment and processing methods, but because the involute of the sprocket with a small number of teeth and the tooth profile of the chain plate is too short, If the contact area is too small, the sprocket produced not only does not have the required wear resistance, but also costs a lot

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