| 摘要 |
A tensioner, in which an outer body and an inner body, which can deal with a tensioner mounting form required by various engines and a tension-imparting function, can be assembled. The inner body and a movement backward preventing mechanism, which form an inner body unit, can be unitized in a shape by which press-fitting and assembling is easy, and its efficient assembling production can be performed. A body 22 of a tensioner 21 is composed of outer and inner bodies 23 and 24 of different members. The outer body 23 is provided with a tensioner mounting means and an inner body fitting hole 23 a. The inner body 24 is provided with a plunger accommodating hole 24 a into which a plunger 26 biased by a compression spring 27 was slidably fitted, and a movement backward preventing mechanism 32 for preventing the backward movement of the plunger 26 is incorporated into the inner body 24 . The movement backward preventing mechanism 32 comprises a rack 26 b formed on a part of the outer circumference of the plunger 26 , a pawl body 32 b pivotably supported with a pivot shaft 32 a in a cutaway groove formed on a front end of the inner body 24 , and a spring 31 c, which biases a pawl of the pawl body 32 b so that the pawl engages the rack 26 b. An inner body side unit 33 composed of at least the inner body 24 , the movement backward preventing mechanism 32 , the compression spring 27 and the plunger 26 , is adapted to be press-fitted and fixed into the inner body fitting hole 23 a of the outer body 23.
|
