Electric linear actuator

Details Electric linear actuator Electric linear actuator

1992-08-31

1994-03-22

Herrmann, Allan D.

Machine element or mechanism

Gearing

Teeth

744248NA, 744248R, F16H 2522

Patent

active

052954072

ABSTRACT:
An electric linear actuator includes an output shaft which is non-rotatable but displaceable in an axial direction and which has one end thereof coupled to a driven device; a cylindrical member arranged coaxially with the output shaft and rotatably about the output shaft, and driven by an electric motor for rotation; and a feed screw mechanism arranged between the output shaft and the cylindrical member for converting a rotating motion of the cylindrical member to a linear motion of the output shaft. The feed screw mechanism has a male spiral groove formed in the outer peripheral surface of the output shaft; a nut cylinder secured on the inner peripheral side of the cylindrical member and formed with a plurality of circular holes; and a plurality of balls accommodated in the circular holes and engaged with the male spiral groove.

REFERENCES:
patent: 2959978 (1960-11-01), Boutwell
patent: 2995948 (1961-08-01), Galonska et al.
patent: 3068713 (1962-12-01), Davis
patent: 3512426 (1970-05-01), Dabringhaus
patent: 4920817 (1990-05-01), Granbom

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