Linear actuator using radial bearing

Details Linear actuator using radial bearing Linear actuator using radial bearing

1998-10-07

2000-06-27

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 12, H02K 706

Patent

active

060810505

ABSTRACT:
A extendable/retractable linear actuator includes a rotational driving member having a rotational shaft, a rotational unit engaged to the rotational shaft of the rotational driving member, extended toward a rotational shaft direction, and rotatably driven in accordance with the rotational driving member, a plurality of radial bearings each respectively having a bearing rotation shaft inclined by an angle (.alpha.) against the rotational shaft axis direction, and symmetrically fixed to each opposing and surface of the rotational unit, and a cylindrical movement tube, surrounding the rotational unit, an inner periphery thereof being in contact with the radial bearings. The linear actuator is directed to minimizing the number of parts and decreasing friction between the parts, thereby accomplishing a simplified and cost-effective structure having an operational efficiency due to a small rolling friction.

REFERENCES:
patent: 4203328 (1980-05-01), DeBoynton
patent: 4660431 (1987-04-01), Heine
patent: 4947698 (1990-08-01), Dodds et al.

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