| 摘要 |
<p>PROBLEM TO BE SOLVED: To excellently execute pressing and sliding of a friction pad by a ball screw shaft by obtaining a rotation prevention mechanism which is excellent in smooth sliding of the ball screw shaft and in durability, and to obtain the rotation prevention mechanism which is excellent in workability, productibity, and maintainability. SOLUTION: Braking is performed by sliding a pushing member of a caliper body 10 and the friction pad 3 by the ball screw mechanism 13 constituted by screwing the ball screw shaft 26 to a ball screw nut 23 and by pressing and sliding the friction pads 3 and 4 to a disk rotor 1. A rotation prevention shaft 28 is fixed and protruded in parallel with the ball screw shaft 26 to the pushing member of the friction pad 3 connected and fixed integrally slidably to the ball screw shaft 26. The rotation prevention shaft 28 is inserted and arranged so as to be slidably and not to be rotated at a rotary cylinder part 18 which is an the outer side than the ball screw mechanism 13.</p> |
