Ball screw device

Details Ball screw device Ball screw device

1991-12-20

1993-07-20

Braun, Leslie A.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

744248R, 74459, 384 43, F16H 2522

Patent

active

052283534

ABSTRACT:
A ball screw device has a ball screw nut and a ball spline nut, both mounted on a shaft. Both the nuts are supported on a housing with ball bearings interposed therebetween. Inner race grooves of the ball bearings are formed on outer peripheral walls of the nuts, while outer race grooves of the ball bearings are formed on an inner peripheral wall of the housing. In another embodiment, ball insertion holes are formed through the nuts so that the ball insertion holes extend from inner peripheral walls of the nuts to the inner race grooves, respectively. The insertion holes are closed by plugs which were fitted in the insertion holes subsequent to the insertion of balls of the ball bearings through the insertion holes. In a further embodiment, a ball screw nut and a ball spline nut, both mounted on a shaft, are supported on a common housing by way of ball bearings, thereby constructing a ball screw device with a closed small space surrounded by the housing, ball screw nut, ball spline nut and shaft. Dust produced inside the ball screw device can be collected in the closed space and discharged directly through a suction hole formed through the housing.

REFERENCES:
patent: 3258983 (1966-07-01), Valenti
patent: 3331469 (1967-07-01), Deflandre
patent: 4407511 (1983-10-01), Benton et al.
patent: 4438986 (1984-03-01), Teramachi
patent: 4597305 (1986-07-01), Brusasco
patent: 4604911 (1986-08-01), Teramachi
patent: 4677869 (1987-07-01), Mayfield
patent: 4939946 (1990-07-01), Teramachi
patent: 5094118 (1992-03-01), Morita
patent: 5121647 (1992-06-01), Teramachi

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