| 摘要 |
A guiding and tensioning device for chain drives in vehicles is provided, having a guiding and tensioning element that can be fastened at a supporting part ( 4 ) of the vehicle and can be brought into an effective contact with the chain ( 1 ) of the chain drive. The device is provided as a rail ( 2 ) arranged in a plane of the chain drive and supported at the carrying part ( 4 ), which in order to reduce oscillations created by the chain drive can be acted on by at least one actuator with a force acting in the direction of the chain. In order to effectively and permanently suppress chain whining in such chain drives, the rail ( 2 ) is provided as a carrier supported on two supports. One support is formed by a drag bearing ( 3 ) arranged on the supporting part ( 4 ) in a locally fixed manner and the other support is a movable support ( 8 ) on the rail ( 2 ), which can be displaced in the longitudinal direction. At least one actuator ( 6 a, 6 b, 6 c, 6 d) is arranged between the supports and engages the rail ( 2 ). The rail ( 2 ) is flexible so that an elastic bending thereof is possible in the plane of the chain drive.
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