| 摘要 |
PROBLEM TO BE SOLVED: To prevent a follower pulley from axially shifting with reference to a sleeve, and to reduce a processing cost of the follower pulley by forming the inner peripheral surface of the follower pulley in a single cylindrical surface. SOLUTION: Caulking portions 30, 30 are formed in a both end surfaces inner periphery part of a follower pulley 7b, and the outer end surface of each of bearing inner rings 19, 19 composing a pair of support bearings 10, 10 is suppressed by the caulking portions 30, 30. Therefore, the follower pulley 7b is prevented from axially shifting with reference to a sleeve 8a. Accordingly, a stepped surface conventionally formed on the inner peripheral surface of the follower pulley 7b is eliminated, and the inner peripheral surface of the follower pulley 7b is formed in a single cylindrical surface. |
