Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1996-12-18
1999-01-12
Lorence, Richard M.
Machine element or mechanism
Gearing
Directly cooperating gears
74441, 74459, F16H 2522
Patent
active
058573836
ABSTRACT:
A linear displacement device (1) is provided with a lead screw (24) having a helical threaded portion (74) 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 threaded member (66) is supported radially inward of said inner race (60). Threaded member (66) includes a plurality of concentric grooves (72) for engaging the flank (68, 72) of a helical threaded portion (74) of the lead screw (24) and a crest contacting portion (70) for engaging a crest (76) of the helical threaded portion (74) of the lead screw (24). A spring member (68) is provided for preloading the bearing (56, 58).
REFERENCES:
patent: 2482082 (1949-09-01), Wahlberg
patent: 2616302 (1952-11-01), Wahlmark
patent: 3614900 (1971-10-01), Wahlmark
patent: 4856356 (1989-08-01), Gartner
patent: 5533417 (1996-07-01), Devenyi
Lenzen, Jr. G. H.
Lorence Richard M.
Parekh Ankur
Raytheon Company
Schubert W. C.
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