Ball screw drive
AssigneeSchaeffler Technologies AG & Co. KG
InventorStephan Ruffershöfer
Life of this patent
Estimating the term…
Abstract
A ball screw drive having a hollow spindle is designed for ease of manufacture. A threaded outer part is joined to an inner sleeve by a press fit joint. The inner sleeve may be made of a softer material than the outer part. The inner sleeve includes a collar that projects beyond the outer part. The collar includes at least one stop element and may have teeth. The stop elements may interact with a stop contour of a ball screw nut and/or with anti-rotation contours of a housing.
Claims19
A ball screw drive, having a ball screw nut and a hollow threaded spindle, the hollow spindle being assembled from an outer part having a thread and an inner sleeve, the inner sleeve connected to the outer part without additional components and having a collar, which projects beyond the outer part at a first and on which at least one stop elements is formed, wherein the ball screw nut has a stop contour provided for interaction with the stop element.
A hollow threaded spindle comprising:
- an outer part having a thread;
- and
- an inner sleeve press fit into the outer part, the inner sleeve having a collar projecting beyond the outer part at a first end, and at least one stop element being formed on the collar.
A method of manufacturing a ball screw drive, the method comprising:
- providing a threaded outer part;
- providing a first inner sleeve having a collar at a first end, at least one stop element being formed on the collar;
- and
- press fitting the first inner sleeve into the outer part such that the collar projects beyond and end of the outer part to form a spindle.
Dependencies are inferred from the claim text.