Brake actuator

Details Brake actuator Brake actuator

1979-11-29

1981-10-20

Reger, Duane A.

Brakes

Wheel

Axially movable brake element or housing therefor

188348, F16D 6518

Patent

active

042955483

ABSTRACT:
A helical thrust bearing (14) is arranged between two rotatable cam components (12 and 13) of a brake actuator. The cam component (13) is turned first while the brake slack is being taken up and the brake-applying force is relatively low, the reaction to such force being transmitted to the body (10) at a plain axial thrust bearing (17,18). Only the cam component (12) is turned when the brake is actually being applied with the relatively high brake force which is transmitted to a thrust member (15) at a roller axial thrust bearing (16). This enables the pneumatic force motor or the prime mover to be used more efficiently. Also a greater angular displacement at the helical thrust bearing (14) is obtained for a given angular displacement of the cam components (12 and 13) relative to the body (10).
In a modification, the plain thrust bearing (17,18) is replaced by another helical thrust bearing.

REFERENCES:
patent: 3144100 (1964-08-01), Kay
patent: 3269491 (1966-08-01), Belart et al.

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