US 12,031,613 B2
Profiled nut of a screw drive, in particular a ball screw nut of a ball screw drive, and method for the production thereof
Mario Kreutzer, Sonneberg (DE); Richard Baier, Aurachtal (DE); Thomas Kandler, Herzogenaurach (DE); and Paul Heinz, Forchheim (DE)
Assigned to Schaeffler Technologies AG & Co.KG, Herzogenaurach (DE)
Appl. No. 17/609,011
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Apr. 22, 2020, PCT No. PCT/DE2020/100332
§ 371(c)(1), (2) Date Nov. 5, 2021,
PCT Pub. No. WO2020/239164, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 10 2019 114 276.8 (DE), filed on May 28, 2019.
Prior Publication US 2022/0205519 A1, Jun. 30, 2022
Int. Cl. F16H 25/22 (2006.01); F16H 25/24 (2006.01); B21D 53/24 (2006.01)
CPC F16H 25/2204 (2013.01) [F16H 25/24 (2013.01); B21D 53/24 (2013.01); F16H 2025/2481 (2013.01); F16H 2025/249 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A profiled nut of a screw drive, a sleeve of which, produced from a multi-layer composite sheet steel, has a non-cuttingly formed rolling profile on its inner circumference for rolling contact with rolling bodies and is hardened in a heat treatment method at least in a region of the rolling profile, wherein an inner lateral surface of the sleeve having the rolling profile is hardened and has a first Rockwell hardness, and an outer lateral surface of the sleeve is configured such that it can be welded and has a second Rockwell hardness lower than the first Rockwell hardness, and
wherein the multi-layer composite sheet steel includes: i) a first layer comprising an alloyed steel forming the inner lateral surface of the sleeve and having a first carbon content, and ii) a second layer forming the outer lateral surface comprising an alloyed steel having a second carbon content lower than the first carbon content.