Patent ID: 6196941
Filing Date: 2001-03-06
Classification: F16H

Abstract:
An auto tensioner comprising:a fixing shaft having an arm supporting portion;an arm supported around said arm supporting portion of said fixing shaft so as to be swingable;a tension pulley supported rotatably at a free end of said arm;an opposing member disposed so as to oppose said arm and blocked from rotating relative to said arm supporting portion;a friction plate disposed between said arm and said opposing member so as to supply said arm with a swing resistance due to a friction resistance generated by a contact thereof with said opposing member; anda pressing member for pressing said arm against said friction plate so as to make said friction plate in contact with said opposing member,wherein at least one of said arm supporting portion and said opposing member has a wearing particles collecting portion for collecting wearing particles generated in a plane contacting said friction plate because of a friction with said friction plate, wherein said wearing particles collecting portion comprises a concave portion formed in a plane in which at least one of said arm supporting portion and said opposing member is in contact with said friction plate.