Freestyle belt sheave

Abstract

The invention relates to a freestyle belt pulley with a built-in unidirectional bearing, which is fixed on the end part of the rotating shaft of a vehicle alternator. Between driving belt pulleys fixed on the end part of an engine crank shaft, an endless belt is hung to drive the vehicle alternator. In the invention, the inner ring of the unidirectional bearing and an integrated mandrel are designed as an integrated structure, thereby solving the problem that slipping phenomenon can easily occur between the prior unidirectional bearing and the integrated mandrel; a double-row bearing structure, which comprises the unidirectional bearing and a supporting bearing, is adopted, wherein the outer circle of the unidirectional bearing is a double-rib outer circle, and the outer circle of the supporting bearing is a solid single rib outer circle, thereby avoiding poor concentricity and roller path precision consistence caused by a long roller path; the front part of the integrated mandrel is provided with a shoulder with high positioning accuracy for positioning the unidirectional bearing, and the effective length for passing torques is uniform; and dust proof components are arranged on the front end of the unidirectional bearing and the rear end of the supporting bearing, and the dust proof components has high dust proof performance, and long service life, and is suitable for various road conditions.

Description

technical field [0001] The invention relates to a free pulley with a built-in one-way bearing, which is fixed at the end of the rotating shaft of an automobile alternator, and is connected to a drive pulley fixed at the end of the crankshaft of an engine to drive the above-mentioned automobile alternator by hanging a jointless belt. machine. Background technique [0002] At present, domestic automobile generators use simple pulleys without one-way bearings. Under the requirements of increased electric power of automobiles, slippage is easy to occur, causing the entire vehicle to fail to work normally. The life of the entire gear train around the car engine, including belts and idlers, the engine drives the generator to work through the gear train. When the engine changes speed, the speed of the belt will fluctuate slightly due to the influence of the combustion process of the engine. Since the entire wheel train is a driven part, including the driven pulley of the generator...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in the existing driven pulley device, due to the lack of reliable axial positioning between the one-way bearing and the support bearing and the mandrel, the axial positioning accuracy of the entire wheel train is affected, resulting in transmission The effective length of the torque is not uniform; there will be slippage failure between the one-way bearing and the mandrel; when the road condition is relatively bad, dust will enter the support bearing during the driving of the car and affect the service life, etc.

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