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Timing belt tensioner with a backstop device with controlled one-way mechanism

Abstract

A tensioner (10) for an endless belt comprising a stationary structure on which a pivotal tension arm (13) with an idler pulley (11) is mounted. A spring (15) between the tension arm and the stationary structure (16) acts to bias the pulley (11) against the belt, thereby applying tension. The invention includes a one-way device that is operable in response to the extent of pivotal movement of the tension arm (13) in the forward direction to establish different positions at which pivotal movement in the return direction is limited. A damping system (44) is used to restrict pivotal movement of the tension arm (13) as a result of sudden short-time vibratory movements or dynamic vibrations in cold conditions.

Classifications

F16H7/129 Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path with means for impeding reverse motion
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CA2368985A1

Canada

Other languages
French
Inventor
Jorma J. Lehtovaara
K. Mats Lipowski
Marek Frankowski
Jacek Stepniak
Current Assignee
Litens Automotive Inc

Worldwide applications
2000 CA AU WO

Application CA002368985A events
2007-03-20
Application granted
Anticipated expiration
Expired - Fee Related