| 摘要 |
PROBLEM TO BE SOLVED: To improve the durability by suppressing the expansion stroke of a dust boot to seal a slidable contact surface in a slidable rubber bush which is slidable in the rotational direction and the axial direction relative to a support shaft. SOLUTION: A slidable rubber bush 2 comprises an outer cylinder 3, an intermediate cylinder 5 concentrically arranged inside the outer cylinder 3, an elastic body 4 interposed in a fixed manner between the outer cylinder 3 and the intermediate cylinder 5, an inner cylinder 7 slidably fitted in the intermediate cylinder 5 through a bearing 6, and a dust boot 8 mounted between the intermediate cylinder 4 and the inner cylinder 7, and a stopper part 7a to regulate the movement in the axial direction of the intermediate cylinder 5 is provided in the inner cylinder 7 to remarkably reduce the movement in the axial direction of the intermediate cylinder 5 relative to the total movement in the axial direction of the outer cylinder 3 and the expansion stroke of the dust boot 8. The durability of the dust boot 8 can be improved without increasing the number or the diameter of the bellows. |
