Coupling type overrunning alternator pulley of automobile engine

Abstract

The invention discloses a coupling type overrunning alternator pulley of an automobile engine. The coupling type overrunning alternator pulley of the automobile engine comprises a mandrel and a pulleyshell. A bearing spring, a one-way spring, a first spring bearing seat and a second spring bearing seat are arranged between the mandrel and the pulley shell. When the pulley of the automobile engineis started and operates clockwise, the first spring bearing seat which is in the interference state with the overrunning alternator pulley shell pulls the one-way spring to rotate; since the one-wayspring and the second spring bearing seat are in the interference state, the second spring bearing seat drives the mandrel to perform synchronous movement, and engagement of a clutch is achieved. Whenthe rotation speed of the pulley shell is lower than that of the mandrel, the first spring bearing seat which is in the interference state with the pulley shell exerts counter thrust to the one-way spring, the one-way spring is expanded, the inner diameter of the one-way spring is larger than the outer diameter of the second spring bearing seat fixed to the mandrel, so that the mandrel and the pulley shell are in the separated state, and disengagement of the clutch is achieved.

Description

technical field [0001] The invention relates to the field of vehicle engines, in particular to the field of one-way pulleys for automobile generators, in particular to a coupled one-way pulley for automobile generators. Background technique [0002] The car generator one-way clutch pulley can avoid the reverse current generated during reverse rotation to prevent damage to the electronic devices in the car, improve the life of the generator system, and reduce carbon monoxide emissions. Most of the pulleys of the one-way devices of automobile generators on the market are driven by rolling bearings. The radial dimension of the rolling bearing is large, the vibration damping ability is poor, the service life is low when running at high speed, and the sound is loud. And rolling bearings have high requirements for bearings. Generally, after the bearings are installed in the working position, the installation and positioning are often caused by the manufacturing process. Therefore...

AI Technical Summary

Problems solved by technology

Since the engaged state is the normal state of the clutch, the one-way spring is prone to permanent deformation and damage if it is in the expanded state for a long time

At the same time, in the process of clutch disengagement, the one-way spring as a whole will form friction with the bearing outer ring, which will also reduce the service life of the one-way spring

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