Ball nut drive assembly
AssigneeSchaeffler Technologies AG & Co. KG
InventorsRenato DE PAULA, Michael ZINNECKER
Life of this patent
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Abstract
A ball screw assembly is disclosed herein. The assembly includes a nut having an outer raceway, and at least one notch. A spindle extends inside of the nut, and the spindle defines an inner raceway. A ball-spring assembly includes a plurality of balls supported between the outer raceway and the inner raceway, and at least one reset spring engaged against at least one ball of the plurality of balls At least one end-stop component is engaged against a terminal end of the ball-spring assembly and positioned within the at least one notch. A radially inner side of the at least one end-stop component abuts the spindle. A method of forming the nut for a ball screw assembly is also disclosed herein.
Claims20
A ball screw assembly comprising:
- a nut including an outer raceway, and at least one notch;
- a spindle extending inside of the nut, the spindle defining an inner raceway;
- a ball-spring assembly including a plurality of balls supported between the outer raceway and the inner raceway, and at least one reset spring engaged against at least one ball of the plurality of balls;
- at least one end-stop component engaged against a terminal end of the ball-spring assembly and positioned within the at least one notch, wherein the at least one notch has non-curved, flat circumferentially spaced apart sides each extending parallel to each other.
A method of forming a nut for a ball screw assembly, the method comprising:
- forming a nut having an outer raceway defined on a radially inner surface of the nut and an anti-rotation feature defined on a radially outer surface;
- and
- cold-forming at least one notch on at least one axial end of the nut, the at least one notch being circumferentially adjacent to an end of the outer raceway.
Dependencies are inferred from the claim text.