| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a structure for suppressing the sound of resonance caused by the vibration of a permanent magnet type deenergization actuating brake/ clutch. SOLUTION: Two plate springs 5 are used, and either a viscoelastic material 5a damping vibration is attached to a portion halfway between them or films 5c are attached to their surfaces to maintain a vibration damping property. The plate springs are changed from a conventional ring shape to a Y shape to deviate the point of resonance from a service range. Also, shims are held above and below the plate springs to damp vibration, and a structure damping the vibration is sandwiched between a hub and an armature. In order to reduce the rigidity of the hub, an extraction hole is provided or a double-body structure in which a rubber damper is sandwiched between the plate springs is formed to damp the vibration.</p> |
