US 12,247,648 B2
Stop pin for a ball screw assembly
Justin K. Brubaker, Greenville, SC (US); Ken Anderson, Taylors, SC (US); Trent L. Carpenter, Anderson, SC (US); and Daniel J. Schertz, Pickens, SC (US)
Assigned to JTEKT Bearings North America LLC, Greenville, SC (US)
Appl. No. 17/796,825
Filed by JTEKT Bearings North America LLC, Greenville, SC (US)
PCT Filed Feb. 4, 2021, PCT No. PCT/US2021/016610
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2021/158788, PCT Pub. Date Aug. 12, 2021.
Claims priority of provisional application 62/969,874, filed on Feb. 4, 2020.
Prior Publication US 2023/0049077 A1, Feb. 16, 2023
Int. Cl. F16H 25/22 (2006.01)
CPC F16H 25/2233 (2013.01) 11 Claims
OG exemplary drawing
 
1. A ball screw assembly comprising:
a ball screw shaft including a ball groove formed in an outer surface thereof;
a ball nut having an outer surface and an inner surface between first and second end faces, the ball nut including a central bore formed by the inner surface thereof, the inner surface defining a ball groove, and an axial recess extending inwardly in a direction parallel to an axis of the central bore of the ball screw nut from one of the first and second end faces of the ball nut and into the ball groove of the inner surface;
a stop pin disposed in the recess so that a portion of the stop pin extends inwardly into the ball groove of the inner surface of the ball nut; and
a spring having a first end and a second end, the first end of the spring abutting the stop pin,
wherein a portion of the ball screw shaft is rotatably received within the central bore of the ball nut, and the stop pin is formed by a coiled strip of metal having a first end, a second end, and an outer surface,
wherein the first end of the spring abuts both the first end of the stop pin and the outer surface of the stop pin.