Motorized ball nut

Details Motorized ball nut Motorized ball nut

1982-03-15

1985-08-06

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318630, 318 9, G05B 106

Patent

active

045338590

ABSTRACT:
A motorized nut for use in conjunction with a fixedly secured lead screw for displacing a movable member along a fixed member into which the lead screw is journaled parallel to the desired path of member movement, includes an induction motor whose case is rigidly secured to the movable member. The motor rotor is made hollow so as to allow the lead screw to extend coaxially therethrough. A pair of nuts are each secured in a separate one of the ends of the tubular motor rotor for threadedly engaging the lead screw so that as the motor rotor rotates in response to motor excitation, the motor stator and hence, the movable member, are displaced on the movable member along the axis of the ball screw.

REFERENCES:
patent: 3056909 (1962-10-01), Tripp
patent: 3111614 (1963-11-01), Phillips et al.
patent: 3666141 (1972-05-01), Ma et al.
patent: 3798430 (1974-03-01), Simon et al.
patent: 4134106 (1979-01-01), Hungerford
patent: 4234777 (1980-11-01), Balfanz

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