Hydrostatic feed screw mechanism and movable body using the same

Details Hydrostatic feed screw mechanism and movable body using the same Hydrostatic feed screw mechanism and movable body using the same

1996-04-05

1998-10-06

Marmor, Charles A.

Machine element or mechanism

Gearing

Teeth

744248R, 384111, F16H 2520

Patent

active

058161040

ABSTRACT:
A feed screw mechanism includes a nut having a female thread, and a feed screw shaft having a male thread screw-engaged with the female thread. A thrust pocket is formed along a flank of the female thread of the nut, and pressurized fluid is supplied thereto. A plurality of separated radial pockets are formed on the crest surface of the female thread of the nut, and pressurized fluid is supplied thereto. The thrust pocket is a continuous spiral groove formed along the flank of the female thread of the nut. This structure provides sufficient rigidity in both the radial and thrust directions while reducing the size of the feed screw mechanism.

REFERENCES:
patent: 3493273 (1970-02-01), Greenberg
patent: 5303604 (1994-04-01), Mayfield
patent: 5499942 (1996-03-01), Pflager

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