Ball screw assembly containing a ball spline unit for exact slow

Details Ball screw assembly containing a ball spline unit for exact slow Ball screw assembly containing a ball spline unit for exact slow

1982-02-08

1984-03-27

Levy, Stuart S.

Cutlery

308 3A, 74 8915, 744248R, 744248B, F16C 3104, F16C 2910, F16H 9220, F16H 120

Patent

active

044389868

ABSTRACT:
The ball screw assembly disclosed makes use of a shaft consisting of two parts, one of them being formed as a spline and the other one containng at least two screws spaced from one another at a predetermined distance, wherein the respective screws having a different pitch are in screw engagement with a corresponding ball screw nut and the ball spline unit is fitted onto the spline. Actually, these two screws are in engagement with corresponding stationary and movable ball screw nuts. The stationary nut being held in a housing, while said movable ball screw nuts is adapted to move forward or backward by way of rotation of the shaft. The feed is controlled by way of mechanical or electromagnetic actuation so that quick feed, rough feed, slow feed or exact feed is ensured by the single shaft.

REFERENCES:
patent: 1426546 (1922-08-01), Buttrum
patent: 2092563 (1937-09-01), Tucker
patent: 2842978 (1958-07-01), Orner
patent: 3449978 (1969-06-01), Stmpson
patent: 3844177 (1974-10-01), Bourassa
patent: 4373404 (1983-02-01), Heinz

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