Autotensioner

Details Autotensioner Autotensioner

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 7/12 (2006.01) F16H 7/08 (2006.01)

Patent

CA 2599040

In an autotensioner of a type in which a boss of an oscillating member is pivotally fitted on a spindle of a stationary member through a bush including a metal part and a resin layer formed on the inner periphery of the metal part, the clearance in its initially assembled state between the outer periphery of the spindle and the inner periphery of the bush is 60 µm or less to make it difficult to cause fretting between the spindle and the bush even upon input of large short quick vibrations to the autotensioner and thereby extend the service life of the autotensioner. Furthermore, the spindle has a surface hardness of Hv 500 or more to prevent wear of the spindle itself from progressing even upon occurrence of fretting.

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