Automatic pressure control device for a ball screw

Details Automatic pressure control device for a ball screw Automatic pressure control device for a ball screw

1991-01-23

1994-11-29

Herrmann, Allan D.

Machine element or mechanism

Gearing

Rotary bodies

74459, F16H 5518

Patent

active

053679156

ABSTRACT:
Varying fluid pressure varies the thickness of an elastic spacer between ball nuts of the ball screw. The spacer thickness determines opposed axial forces applied to the ball nuts. During a high-speed excursion of the screw, pressure in the elastic spacer is reduced, thus reducing friction between the ball nuts and the screw. When the screw is being fine positioned for precise operation, pressure in the elastic spacer is increased, thereby urging the ball nuts apart to eliminate play in the ball screw.

REFERENCES:
patent: 2992955 (1961-07-01), Bowerman
patent: 3053106 (1962-09-01), Goldman
patent: 3780989 (1973-12-01), Peterson
patent: 3851541 (1974-12-01), Ploss et al.
patent: 4114470 (1978-09-01), Sharpe
patent: 4487087 (1984-12-01), Johnstone
patent: 4577845 (1986-03-01), Kimura et al.
patent: 4586394 (1986-05-01), Perkins
patent: 4624355 (1986-11-01), Mroz

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