Reliable positioning of one-way pulley and its pulley assembly

Abstract

The invention relates to a one-way pulley with reliable positioning and its pulley assembly. The inner ring of the pulley is a stepped hole, and the stepped hole is composed of a front support bearing section used to cooperate with the front support bearing, and a single pulley used to cooperate with the one-way clutch. The one-way clutch segment is composed of a rear support bearing segment and a rear support bearing segment for cooperating with the rear support bearing. The hole aperture of the one-way clutch segment is smaller than the hole position aperture of the front support bearing segment and the rear support bearing segment; the pulley assembly of the present invention also includes The mandrel coaxially arranged with the belt pulley, the mandrel is a stepped shaft corresponding to the belt pulley, the shaft section shaft diameter for installing the one-way clutch is larger than the shaft section shaft diameter for installing the front support bearing and the rear support bearing, the belt pulley inner ring of the present invention The outer ring of the mandrel and the mandrel adopts a three-stage structure, which is convenient for the installation of the one-way clutch, and the installation process will not damage the dimensional accuracy of the two ends of the inner ring of the pulley and the outer ring of the mandrel, which ensures the interference after the bearing is pressed, so that The bearings are tightly combined with the inner ring of the pulley and the outer ring of the mandrel.

Description

technical field [0001] The invention relates to the technical field of pulley and core shaft assembly, in particular to a one-way pulley with reliable positioning and a pulley assembly thereof, which are used in automobile alternators. Background technique [0002] In order to meet the high power requirements of automotive alternators, the pulley and mandrel assembly, that is, the one-way pulley assembly, as the most feasible solution to realize this function, has attracted more and more attention from many OEMs. A pulley assembly for an automotive alternator, which mainly includes a pulley and a mandrel, and a front support bearing, a one-way clutch and a rear support bearing arranged between the pulley and the mandrel in sequence, and a one-way clutch, a front support bearing and a rear support The bearing is installed between the pulley and the mandrel in the way of interference fit. The interference between the front support bearing and the rear support bearing and the i...

AI Technical Summary

Problems solved by technology

A pulley assembly for an automotive alternator, which mainly includes a pulley and a mandrel, and a front support bearing, a one-way clutch and a rear support bearing arranged between the pulley and the mandrel in sequence, and a one-way clutch, a front support bearing and a rear support The bearing is installed between the pulley and the mandrel in the way of interference fit. The interference between the front support bearing and the rear support bearing and the inner wall of the pulley will directly affect the axial positioning accuracy of the wheel train. The effective length of the transmitted torque is not uniform

The existing inner ring of the pulley is a straight through hole, and the inner ring of the pulley is equipped with a one-way clutch, and the shaft diameters of the front support bearing and the rear support bearing are equal. This structure is simple and easy to manufacture. When the clutch is engaged, it will cause damage to the inner ring of the pulley, and even increase the size of both ends of the inner ring of the pulley, resulting in a reduction in the interference of the front support bearing or the rear support bearing, making the assembly not tight, and causing a gap between the support bearing and the inner ring of the pulley. Insufficient interference, thus affecting the service life of the pulley assembly

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