Ball screw

Details Ball screw Ball screw

1992-09-17

1993-09-07

Lorence, Richard M.

Machine element or mechanism

Gearing

Directly cooperating gears

74459, F16H 2522

Patent

active

052418740

ABSTRACT:
A ball screw incorporates a screw shaft having a plurality of spiral grooves around its circumference. The spiral grooves are engaged by a plurality of balls in assembly units. The balls in each assembly unit are disposed in a plane that is normal to a longitudinal axis of the screw shaft. Each assembly unit retains its plurality of balls at predetermined rotational positions relative to the bearing main body. In one embodiment, the screw shaft includes two spiral threads, there are two assembly units, each carrying two balls disposed 180 degrees from each other, and the two assembly units are spaced axially to place the balls in one assembly unit at an angle of 90 degrees to the balls in the other assembly unit.

REFERENCES:
patent: 2933941 (1960-04-01), Millns
patent: 3062070 (1962-11-01), Beatty et al.
patent: 3184987 (1965-05-01), Beatty
patent: 4821592 (1989-04-01), Rousselet
patent: 4920817 (1990-05-01), Granbom

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