| 摘要 |
<p>The present invention relates to a normally closed brake, which includes a driving member, a driven member, a connecting mechanism by which the driving member brings the driven member into movement along a first direction, a fixed seat with friction face and a brake connected to the driven member. Said connecting mechanism includes an acting block and a driving block being relatively moveable engaged with each other. Namely when the driving member is just subjected to driving forces or gets free from the forces, the relative movement is caused between the both blocks. As a result, in a second direction the driving block takes a displacement to the driven member, to apply braking or cut off braking. The said connecting mechanism further includes a limiting mechanism which limits the range of relative movement between the acting block and the driving block. After putting on the brake or cutting off the brake, the limiting mechanism brings the blocks into their common movement.</p> |
