| 摘要 |
<p>PURPOSE: To reduce dragging by way of certainly restoring a pad position at the time of releasing braking by energizing so as to return a slide pin by specified restoring quantity by an elastic member provided between the slide pin and a guide pipe. CONSTITUTION: When a friction pad on the inner side is pressed on a disc rotor by way of driving a piston at the time of normal braking, a cylinder body 4 slides by its reaction force. At this time, as a guide pipe 30 is held in a slide hole 20 by rubber rings 34A-34C, a slide pin 25 slides in the arrow (c) direction in the guide pipe 30, and a clearanceαbetween a spring seat 27 and the guide pipe 30 is filled. In the meantime, at the time of releasing braking, the cylinder body 4 follows and slides as pressing force of the piston is released, and the slide pin 25 us energized so as to restore by the clearanceαby a spring 40, and the cylinder body 4 returns to a restoring position positively. Consequently, it is possible to constantly reverse the friction pad by the constantly decided restoring quantityα.</p> |
