| 摘要 |
A linear tensioner (22, 122, 222, 322, 422, 522) driven by a torque input is provided having a base (24, 124, 224, 324, 424, 524), a pinion (26, 126, 226, 326) rotatably mounted on the base, a rack (28, 128, 228, 328, 329) operatively engaged with the pinion, an arm (30, 130, 230, 330, 331, 430, 530) slideably mounted on the base (24, 124, 224, 324, 424, 524) and coupled to the rack (28, 128, 228, 328, 329) for linear movement therewith, and a pulley (32, 132, 332, 333, 432, 532) rotatably mounted on the arm (30, 130, 230, 330, 331, 430, 530) to engage and tension an associated power transmitting element such as a belt or chain. The tensioner (22, 122, 222, 322, 422, 522) further includes a means (40, 140, 240, 340, 440, 540, 42, 43) for applying a rotational force to the pinion (26, 126, 226, 326), which may be, for example, a torsion spring (40, 140, 240, 340, 440, 540), a servo motor (42) or a hydraulic pump (43).
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