# US 10,119,600 B2 · Recirculating ball nut, assembly for a ballscrew drive and method for producing a recirculating ball nut

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- Number: US 10,119,600 B2
- Document ID: US10119600B2
- Status: Granted
- Kind: B2
- Application number: 15/119,140
- Filed: 2015-01-27
- Published: 2017-02-02
- Granted: 2018-11-06
- Earliest claimed: 2014-02-19
- Assignees: TRW Automotive GmbH
- Applicants: TRW Automotive GmbH
- Inventors: Peter Urban
- Web page: https://patentgrep.com/patent/US10119600B2

## CPC

- F16H 25/2223: {Cross over deflectors between adjacent thread turns, e.g. S-form deflectors connecting neighbouring threads}
- B21K 1/04: ball-races {or sliding bearing races}
- B21K 1/26: housings or supporting parts, e.g. axle housings, engine mountings
- B23C 3/28: Grooving workpieces (tread-cutting by milling B23G1/32)
- B62D 5/0424: {the axes of motor and final driven element of steering gear, e.g. rack, being parallel}
- B62D 5/0448: {Ball nuts}
- F16H 25/2204: {with balls}
- F16H 25/24: Elements essential to such mechanisms, e.g. screws, nuts (F16H25/22 takes precedence)
- B23C 2220/28: Finishing
- F16H 2025/2081: {Parallel arrangement of drive motor to screw axis}
- F16H 2025/2096: {using endless flexible members}
- F16H 2025/2481: {Special features for facilitating the manufacturing of spindles, nuts, or sleeves of screw devices}
- F16H: GEARING
- B21K: MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS (making particular articles by working sheet metal without essentially removing material B21D; processing wire B21F; making pins, needles or nails B21G; making particular articles by rolling B21H; forging machines, pressing machines, hammering machines, in general B21J; making chains B21L; plating B23K)
- B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q)
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

A method of manufacturing a recirculating ball nut for a ball screw drive, comprising a base body which includes at least one recirculating ball track, the method comprising the following manufacturing steps: manufacturing the base body by precision forging; and finishing the recirculating ball track by a cutting method subsequent to manufacturing the base body.

## Claims

### Claim 1

A method of manufacturing a recirculating ball nut for a ball screw drive, comprising a base body which includes at least one recirculating ball track, the method comprising the following manufacturing steps:
manufacturing the base body by precision forging; and
finishing the at least one recirculating ball track by a cutting method subsequent to manufacturing the base body;
wherein the at least one recirculating ball track is roughly incorporated into the base body by the precision forging step.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the at least one recirculating ball track is milled.