Actuator

Details Actuator Actuator

1999-02-01

2000-07-04

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310103, 310104, 310 12, 464 29, 744248R, H02K 706, H02K 4104, H02K 4900, H02K 510, F16H 118

Patent

active

060843268

ABSTRACT:
A ball screw of an actuator is inserted through a displacement member. Driving-side axial magnetic patterns and driving-side circumferential magnetic patterns are formed on an outer circumference of the displacement member. The ball screw and the displacement member are surrounded by a tube. A slider is provided at the outside of the tube. Driven-side axial magnetic patterns opposing to the driving-side axial magnetic patterns and driven-side circumferential magnetic patterns opposing to the driving-side circumferential magnetic patterns are formed on the slider. Mutual magnetic attraction between the driving-side patterns and the driven-side patterns prevents the displacement member from rotation, and it causes the slider to make displacement in the axial direction together with the displacement member. Since the ball screw of the actuator is surrounded by the tube, the actuator can be prevented from scattering of lubricating oil, dust or the like.

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