| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately detect the degree of wear of an inner peripheral surface of a bushing and an outer peripheral surface of a connecting pin. <P>SOLUTION: A wear detecting groove 21 is arranged on the inner peripheral surface 16A of the respective bushings 16 for inserting and fitting the connecting pin 19. The groove depth of this wear detecting groove 21 is set substantially equal to a wear quantity when requiring the replacement of the bushings 16. Thus, the wear detecting groove 21 gradually reduces in response to the wear of the inner peripheral surface 16A of the bushings 16, and the wear quantity of the inner peripheral surface 16A remains up to reaching the replacing timing, and the wear quantity of the inner peripheral surface 16A disappears when reaching the replacing timing. Thus, the replacing timing of the bushings 16 can be precisely determined by accurately detecting the degree of wear of the inner peripheral surface 16A of the bushings 16, only by visually observing a reduction degree of the wear detecting groove 21 from the outside of the bushings 16. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
