| 摘要 |
<p>PROBLEM TO BE SOLVED: To apply or release a motor-operated disk brake as a parking brake without energizing the motor. SOLUTION: A motor-operated disk brake 1 being of a caliper floating type employs a ball screw mechanism A to convert the rotation of a nut member 11 by the rotation of the rotor 18 of a motor 17 into the rectilinear motion of a piston 4 that in turn presses friction pads 7 and 8 against a disk rotor 3 to produce braking force. For use as a parking brake, a lever 27 is first operated to turn a cam 25, which in turn moves a rod 26 and also a pushrod 36 to finally displace the piston 4 via an adjusting nut 31 with the result that the friction pads 7 and 8 are pressed on the disk rotor 3. In conformance with the wear of these friction pads 7 and 8, a screw transmission mechanism B displaces the adjusting nut 31 following the movement of the piston 4 to adjust the pad clearance.</p> |
