Electromagnetic brake

Details Electromagnetic brake Electromagnetic brake

1978-10-18

1980-10-21

Butler, Douglas C.

Brakes

Wheel

Axially movable brake element or housing therefor

188 723, 188163, 188216, F16D 5902

Patent

active

042288746

ABSTRACT:
An electromagnetic brake wherein a magnetizable armature is fixed to a rotary shaft in a motor or machine and a casing for a solenoid and a permanent magnet is non-rotatably fixed to a stationary member of the motor or machine with freedom of movement in the axial direction of the armature. When the solenoid is deenergized, the magnet maintains a friction liner in the casing in frictional engagement with and brakes the armature. The electromagnetic field which is established on energization of the solenoid assists a set of helical or leaf springs to overcome the force of the magnet and to disengage the liner from the armature. The liner can be disengaged from the armature independently of the solenoid and springs by a linkage or by two bolts whose heads engage a flange of the casing and whose shanks extend through registering holes of the flange and stationary member and mesh with nuts behind the stationary member. When the linkage is actuated or the nuts are rotated in a direction to move toward the heads of the respective bolts, the casing is moved axially of and away from the armature.

REFERENCES:
patent: 3357528 (1967-12-01), Verlinde
patent: 3732447 (1973-05-01), Perhats

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