Electric Actuator

Details Electric Actuator Electric Actuator

1994-04-07

1996-09-10

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 20, 310 37, 414735, H02K 706

Patent

active

055548997

ABSTRACT:
An electric actuator which is used for e.g. an arm of an industrial robot includes a composite shaft having a ball screw groove and a ball spline groove, a hollow motor through which the composite shaft extends, a ball screw nut fitted threadedly about the composite shaft and secured to a motor shaft, and a ball spline nut fitted about the composite shaft and secured to a motor housing. The ball spline nut, ball screw nut, and motor are arranged in the order mentioned as viewed from an attachment for a moving body which is provided at one end of the composite shaft. An angular-contact bearing which supports the motor shaft rotatably is situated closer to the ball screw nut than the motor is.

REFERENCES:
patent: 4501981 (1985-02-01), Hansen
patent: 4509408 (1985-04-01), Kuroda
patent: 4801240 (1989-01-01), Hautau et al.
patent: 5023466 (1991-06-01), Isozumi
patent: 5053670 (1991-10-01), Kosugi
patent: 5139383 (1992-08-01), Polyak et al.
patent: 5300848 (1994-04-01), Huss et al.
patent: 5378141 (1975-01-01), Aoki

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