| 摘要 |
A motor brake unit comprising a housing member defining a fluid chamber disposed about the motor shaft of a motor, a shaft sleeve disposed within the fluid chamber nestingly engaging the motor shaft for rotation therewith, a first plurality of brake elements rotatable with the shaft sleeve, a brake collar secured to the housing member and disposed annularly about said shaft sleeve, a second plurality of brake elements non-rotatably supported by the brake collar, a pole piece for selectively engaging and disengaging the brake elements, biasing means for normally biasing the pole piece to engage the brake elements, and a plurality of electromagnetic coils for selectively attracting the pole piece axially opposite the biasing force to disengage the brake elements. |
