| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To propose a brake device of a servomotor which is small-sized and lightweight though its working speed is low in order to leave the brake open during normal operational conditions. <P>SOLUTION: A braking state of the brake device 1 of the servomotor is formed when compression coil springs 7 cause a slide plate 6 to be pressed against a brake disc 4 that is securely connected to a motor shaft 2. When a small-sized motor 12 causes a cam disc 8 to rotate in a direction in which a cam follower 10 rolls up from a trough 9b of a cam surface 9 to a peak 9a, the slide plate 6 moves against the spring force away from the brake disc 4, and the device switches to a rotation maintaining state in which the braking force has been released. When the cam disc 8 is caused to rotate further in the same direction, the cam follower 10 drops from the peak 9a of the cam surface 9 into a trough 9b, the slide plate 6 is again pushed against the brake 4 by the force of the springs and the device switches to the braking state in which a braking force acts upon the motor shaft 2. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
