Electric motor brake with spring actuation - has electromagnet releasing brake when motor is powered and manual release permitting access to armature

摘要

The motor brake with manual release for an electric motor (1) includes a rear fixed disc (5). An electromagnet support plate (6) carries the windings (8, 9) of the electromagnet and its magnetic coil (10, 11). An armature support disc (12) which carries the armature of the electromagnet. This disc is fitted with brake fittings (14) and a brake disc (16) is arranged on the axis of the motor. A spring (15) is fitted on the motor axis (3) between the rear fixed disc and the armature support disc. This spring is compressed by the action of the electro magnet when the motor is on and electromagnet is supplied. Braking is achieved when the supply to the electromagnet is interrupted. The rear fixed disc of the motor has a transveral aperture in it at a certain distance from the axis. This aperture is crossed by an axis (21) which is fixed to two linkages (23) arranged at its ends. The linkages (23) are designed to be displaced, against the action of the spring (15) by two diametrically opposed projections (22) on the armature support disc (12).