Ball screw mechanism

Details Ball screw mechanism Ball screw mechanism

1986-11-13

1988-06-14

Staab, Lawrence

Machine element or mechanism

Gearing

Directly cooperating gears

74459, F16H 2522

Patent

active

047503785

ABSTRACT:
An easily fabricated and assembled ball-screw mechanism of compact design comprises a cylindrical member having a helical guideway on its inner circumferential surface. The cylindrical member is operatively engaged through bearing members with a screw member having a helical groove in opposed relationship with the helical guideway. A tubular bearing return connecting each end of the helical guideway is freely received in a cavity in the cylindrical member. Each end of the tubular bearing return has a ramp which cooperates with the helical guideway to receive and release the bearing members. The bearing members are held captive in the tubular ball return and between the helical groove and helical guideway. An aperture is located in the tubular bearing return for loading the bearing members. A keeper is received in the cylindrical member to retain the tubular bearing return and includes a node to guide members across the bearing loading aperture.

REFERENCES:
patent: 3143896 (1964-08-01), Edwards
patent: 3148922 (1964-09-01), Roessler, Jr.
patent: 3161073 (1964-12-01), Deutsch et al.
patent: 3372605 (1968-03-01), Orner
patent: 3667311 (1972-06-01), Wysong
patent: 3826153 (1974-07-01), Sheppard
patent: 3850046 (1974-11-01), Nilsson
patent: 3924486 (1975-12-01), Taillardat
patent: 3971264 (1976-07-01), Detraz et al.
patent: 4272476 (1981-06-01), Benton
patent: 4597305 (1986-07-01), Brusasco
patent: 4604911 (1986-08-01), Teramachi

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