| 摘要 |
A belt tensioner for a belt drive of a motor vehicle engine, comprising: a fixed part (2) configured to be fixed with respect to the engine and provided with a pivot (7) defining a rotation axis (A); an arm (3) having a connection portion (10) hinged to the pivot (7) and rotatable about the rotation axis (A) and an opposite portion (42) rotatably supporting a pulley (4) configured to cooperate with a belt of the drive; a main spring (5) interposed between the fixed part (2) and the arm (3) to exert thrust on the arm (3) such as to rotate said arm towards the belt; and at least one rolling bearing (14, 15) interposed between the arm (3) and the pivot (7) to support the arm (3) and ensure the alignment thereof. |
