Pre-loaded self-aligning roller nut assembly for standard microm

Details Pre-loaded self-aligning roller nut assembly for standard microm Pre-loaded self-aligning roller nut assembly for standard microm

1996-03-19

1998-03-31

Herrmann, Allan D.

Machine element or mechanism

Gearing

Teeth

744248R, 74441, F16H 2522

Patent

active

057325979

ABSTRACT:
A linear displacement device (1) is provided with a lead screw (24) having a helical threaded portion (70) and a roller nut assembly (10). The roller nut assembly (10) includes a housing (50) having openings (52, 54) for receiving the lead screw (24) therethrough. A pair of bearings (56, 58) are supported within said housing (50). The bearings (56, 58) each have an inner race (60), an outer race (62) and a plurality of balls (64) disposed between the inner and outer races (60, 62). A spring (94) is disposed between the pair of bearings (56, 58), for biasing the bearings (56, 58) apart. The bearings (56, 58) are provided with a flank engaging portion (66) for engaging the flank (68, 72) of a helical threaded portion (70) of the lead screw (24) and a crest contacting portion (74) for engaging a crest (76) of the helical threaded portion (70) of the lead screw (24).

REFERENCES:
patent: 2940322 (1960-06-01), Uhing
patent: 3614900 (1971-10-01), Wahlmark
patent: 3698258 (1972-10-01), Gartner
patent: 4403522 (1983-09-01), Kumpar
patent: 5533417 (1996-07-01), Devenyi

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