Electro mechanical actuator

Details Electro mechanical actuator Electro mechanical actuator

1988-05-27

1989-06-27

Herrmann, Allan D.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

744248R, 180 791, F16H 2522, B62D 504

Patent

active

048417904

ABSTRACT:
An electro-mechanical linear actuator particularly attractive for vehicle steering applications includes a case having a cover part rigidly attached to a housing part and an output rod supported on the case for linear shiftable movement along a primary axis of the case. An electric motor is mounted on the housing part of the case with a shaft of the motor supporting in cantilever fashion a pinion in a gear chamber of the case between the housing and cover parts. A drive gear is disposed in the gear chamber around output rod and meshes with the pinion. A tubular hub surrounds the output rod and is rigidly attached to the drive gear. A pair of taper roller bearings mount the tubular hub in cantilever fashion on the housing part for rotation about the primary axis. A ball screw assembly between the tubular hub and the output rod moves the rod linearly when the hub rotates.

REFERENCES:
patent: 1945496 (1934-01-01), Sloan et al.
patent: 3860029 (1975-01-01), Hubler
patent: 4593780 (1986-06-01), Saito
patent: 4765426 (1988-08-01), Shimizu
patent: 4771845 (1988-09-01), Shimizu

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