Patent ID: 6102820
Filing Date: 2000-08-15
Classification: F16H

Abstract:
An auto-tensioner for applying tension to an endless transmitting band, comprising:a base member having an inner shaft;a braking member formed of a resin and fitted over an outer peripheral surface of said inner shaft;an arm member made of an aluminum material and manufactured by die casting, the arm member having an outer shell fitted over an outer peripheral surface of said braking member;a rotary member mounted on said arm member; anda resilient member biases said arm member in a direction to bring said rotary member into pressure contact with said endless transmitting band, a swinging movement of the arm member is damped by a friction force generated between the outer peripheral surface of said braking member and an inner peripheral surface of said outer shell, whereinthe inner surface of said outer shell of the arm member in sliding contact with the outer peripheral surface of said braking member is shot peened prior to assembly.