| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electromagnetic braking device for an elevator lifting machine, having smaller-size construction and facilitating to provide required braking force. <P>SOLUTION: A movable iron core 16 is held on a fixed iron core 12 provided on a fixed portion 1 of the lifting machine by sliding mechanisms 18, 19 and a brake shoe 17 is connected to the movable iron core 16 for thrusting a braking plane 5 of the lifting machine. An electromagnetic coil 13 which is energized for attracting the movable iron core 16 to separate the braking shoe 17 from the braking plane 5 is provided on the fixed iron core 12. A braking spring 20 consisting of a plate spring is put in engagement with the fixed iron core 12 for energizing the braking shoe 17 in the direction of the braking plane 5 during deenergizing the electromagnetic coil 13. Thus, a great braking force is generated by the small plate spring, providing reduced sizes of the electromagnetic braking device and the lifting machine and reducing the operating energy. <P>COPYRIGHT: (C)2003,JPO</p> |
