Roller friction type one-way belt wheel

Abstract

The invention relates to a one-way belt wheel, in particular to a roller friction type one-way belt wheel for an automobile generator. The roller friction type one-way belt wheel comprises a belt wheel body and a sleeve, wherein the belt wheel body is arranged on the outer ring of the sleeve in a sleeving mode, the belt wheel body and the sleeve are coaxially arranged, and a first positioning bearing and a second positioning bearing are sequentially arranged in the inner hole of the belt wheel body in the axial direction. The roller friction type one-way belt wheel is characterized in that a one-way clutch assembly is arranged between the first positioning bearing and the second positioning bearing and comprises an inner ring, an outer ring, rollers, supporting springs and retainers, wherein the inner ring is tightly arranged on the outer circle of the sleeve in a sleeving mode, a plurality of grooves are uniformly formed in the surface of the inner ring, every two adjacent grooves are connected through an arc-shaped groove, each groove is provided with an arc-shaped working face, and the circle center corresponding to each arc-shaped working face is deviated from the center of the inner ring. According to the belt wheel, the problems of friction heating and fracturing of the supporting springs can be avoided, the noise can be effectively reduced, and the service life of the one-way belt wheel can be prolonged.

Description

technical field [0001] The invention relates to a one-way pulley, in particular to a roller friction type one-way pulley for an automobile generator. Background technique [0002] The automobile alternator pulley is connected with the automobile engine through the belt, and the engine drives the alternator to rotate. During the use of the generator, when the engine or other mechanical structures suddenly accelerate or decelerate, the speed of the pulley of the generator also changes. There will be an impact between the belts on the belt, which will reduce the life of the belt and cause noise; when the engine slows down or stops working, the pulley will have a very short reverse rotation, although it is a very short small rotation, but It will also drive the generator rotor to reverse an angle to generate negative electricity, and then switch to positive electricity, so that the coil in the generator rotor is repeatedly impacted by positive and negative electricity, reducing...

AI Technical Summary

Problems solved by technology

At present, the domestic one-way pulley is tested in the rapid change performance test of the pulley (the running time of the pulley is 3s when the speed of the pulley rises from 5000r / min to 18000r / min, and then drops from 18000r / min to 5000r / min, and the operation is 120,000 times). It is easy to generate heat when it rotates with the pulley at high speed (the speed of the test pulley is reduced), and the support spring in the special needle roller bearing assembly is easy to shift, deform or even break, and the noise is relatively loud during operation

It is difficult to meet the technical life requirements of one-way pulleys

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