A motorcycle sprocket

Abstract

The invention discloses a large sprocket wheel of a motorcycle, which comprises a sprocket body provided with sprocket teeth. On the wheel body, a protective layer integrated with the sprocket body is formed by injection molding of modified polypropylene material for automobiles. The protective layer has the covering layer part of the inner wall of the one-way device positioning hole base hole and the inner wall of the weight-reducing hole base hole, and is in the corresponding The positions respectively form the positioning hole of the one-way device and the weight reducing hole. The protective layer is located on both sides of the sprocket body to form an annular covering plate with a thickness of 1-2mm. The outer edge of the annular covering plate is formed with a bevel angle of α along the thickness direction 10-15° conical surface; the thickness of the injection molding material for the weight-reducing hole on the protective layer is 0.5-0.8mm. The beneficial effect of the present invention is that environmental pollution links such as painting or galvanizing are eliminated, the surface quality requirements of the sprocket body are low, the processing amount is small, the consumption of injection molding materials is small, the manufacturing cost of the sprocket is low, the overall strength is high, and the use noise is small .

Description

technical field [0001] The invention relates to a motorcycle sprocket, in particular to a motorcycle large sprocket. Background technique [0002] Motorcycle is a common means of transportation throughout urban and rural areas. The power transmission of existing motorcycles mainly adopts the chain transmission method. The driving sprocket, also known as the small sprocket, which is fixedly connected with the output shaft of the engine, drives the driven sprocket through the chain. Also known as the large sprocket or the rotation of the chain disc, the large sprocket is connected to the driving hub of the motorcycle through a one-way clutch, so as to realize the power transmission of the motorcycle. For the protection of the chain part of the sprocket wheel of an ordinary motorcycle, a protective cover is provided outside the chain teeth of the chain and the sprocket wheel only for safety considerations, which belongs to an open transmission system. Therefore, most of the bo...

AI Technical Summary

Problems solved by technology

However, the sprocket needs to process the annular groove on the end face of the body and the through hole in the annular groove, and fill the through hole with rubber, which increases the processing content of the sprocket in the annular groove and the through hole. At the same time, the through hole needs to be injected. Full of rubber, resulting in a large consumption of injection molding materials; in addition, because the injection molding material is rubber, it cannot strengthen the strength of the body

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