摘要 |
The present invention provides an electromagnetic brake which can set components for eliminating abnormal noise in armature plate releasing. The electromagnetic brake (1) is characterized by comprising the following components: a first armature plate (10) which sucks the side of a first magnetic yoke (3) through operation of a first electromagnetic coil (12); a first brake spring which applies a force in a direction which causes a first brake plate (8) and the first armature plate (10) to depart from the first magnetic yoke (3), wherein the first brake plate (8) can freely rotate integrally with a rotation transmission shaft and can move relative to the rotation transmission shaft; and a first space guiding member (6) which is used for guiding movement of the first armature plate (10); and a plurality of first O-shaped rings (25) which are configured at the outer periphery of the first space guiding member (6) and are used for supporting the armature plates. Through the structure, the first space guiding member (6) utilizes elasticity and friction of the plurality of O-shaped springs (25), and movement gesture of the first armature plate (10) caused by guiding width increase is utilized for reducing impact sound. Furthermore the number of the components can be reduced to one, namely the O-shaped ring is utilized as the only component for reducing abnormal sound. |