| 摘要 |
<p>An automatic tensioner characterized in that a swinging lever (30) having a pulley (10) mounted at the leading end thereof is rotatably supported by a fixed case (20), and that the swinging motion of the swinging arm (30) is damped by virtue of the action of a helical torsion spring (40) and a friction member (60). A coned disc spring (70) is disposed not at the proximal end portion of a hub (31) for the swinging arm (30) where the friction member (60) is disposed but at the leading end portion of the hub (31). Interposed between a plate (80) constituting the fixed side and the swinging arm (30) constituting the rotating side is the friction member (60) which comes into direct contact with the plate (80) and the swinging arm (30). This prevents the generation of rattling noise attributed to play. Even microvibrations can be damped by positively generating swinging resistance.</p> |
