Stretcher for a transmission belt

摘要

Tensioner (1) for a transmission belt (2) comprising a fixed part (3) suitable for being rigidly connected to a support structure, a movable part (4) hinged to the fixed part (3) about a first axis (A), a pulley (5) carried by the movable part (4) and rotating with respect thereto about a second axis (B) distinct from the first axis and parallel thereto, a spring (6) interposed between the fixed part (3) and the movable part (4) and suitable for loading in use the movable part (4) in the direction tending to keep the pulley (5) in engagement with the relative belt (2), and a damping element (30) provided with a base wall (35) rigidly fixed to the fixed part (3) and with an annular friction portion (39) extending axially from the base wall (35) and cooperating with a seat (40) produced in the movable part (4). <IMAGE>