| 摘要 |
<p>An object of the present invention is to decrease the cost of an auto-tensioner for holding a tension of a belt at a constant value. A pulley (13) is mounted on the outer surface of a pulley support member (6), an eccentric position of which is supported by a support shaft (3), and a tension applying means is provided for rocking the pulley support member (6) in the direction, in which said pulley (13) stretches the belt. A cylindrical portion (8a) disposed coaxially with the support shaft (3) is provided on the pulley support member (6), and a damper mechanism (20) for applying a rocking resistance to the pulley support member (6) is provided between said cylindrical portion (8a) and the support shaft (3). The pulley support member (6) consists of an eccentric ring (7) and a rocking shaft (8) comprising the cylindrical portion (8a) integrally formed at an end portion of a tubular small-diameter shaft portion (8b) thereof, which is inserted into said eccentric ring (7). Thus, the pulley support member (6) is formed by a combination of the two parts which have simple shapes and are easy to manufacture. <IMAGE></p> |
