Direct lever acting solenoid released brake mechanism

Details Direct lever acting solenoid released brake mechanism Direct lever acting solenoid released brake mechanism

1986-08-06

1989-01-17

Butler, Douglas C.

Brakes

Operators

Spring

188 717, 188 729, 192 7029, 310 77, 318372, B60T 1304, F16D 1106, H02K 710, H02P 300

Patent

active

047982691

ABSTRACT:
A brake mechanism is disclosed wherein a support lever is pivoted at a pivot end to a stationary bearing plate and is urged by a plurality of springs, which engage the support lever radially inwardly from its pivot end, toward the end plate to effect clamping of a rotatable friction disc between the end plate and a brake shoe disposed near the pivot end of the support lever. A solenoid has a plunger pivotally connected directly to a bracket end of the support lever adapted to overcome the forces applied by the springs and release the brake when the solenoid is energized. The springs apply pressure in close proximity to the pivot point and with the solenoid being disposed at the remote free end of the support lever, there are achieved greater mechanical advantages without the need for complicated linkage assemblies. The arrangement of parts is such that the solenoid mechanical advantage is substantially 7 to 1, while the spring-set mechanical advantage is approximately 7 1/2 to 1. The greater spring-set mechanical advantage ensures that the support lever always maintains contact with the stationary bearing plate.

REFERENCES:
patent: 2217464 (1940-10-01), Arnold
patent: 3171515 (1965-03-01), Wolfe
patent: 3289797 (1966-12-01), Brzezinski et al.
patent: 3525424 (1970-08-01), McCarthy
patent: 4117912 (1978-10-01), Ruppe, Jr.
patent: 4142610 (1979-03-01), Alexander et al.
patent: 4181201 (1980-01-01), McCarthy
patent: 4445596 (1984-05-01), Waters et al.

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