Ball screw drive

US7210369B2 · kind B2 · utility

Assignee

• Ina Schaeffler KG · DE

Inventors

• Gunter Hartig
• Jurgen Osterlanger · Emskirchen, DE
• Dieter Adler · Herzogenaurach, DE
• Manfred Kraus · Kehl, DE
• Ralf Mayer · Weitra, AT

Key dates

• Filing date: May 5, 2005
• Grant date: May 1, 2007
• Expiry date: May 5, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19772
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a ball screw drive comprising a spindle nut (2) that can be disposed on a spindle (1), said spindle nut (2) comprising on an inner periphery, a ball groove (3) that is arranged along a helix and defines a load-bearing channel (6) for balls (5), an external deflector (7) comprising a return channel (8) for the balls (5) being arranged on an outer periphery of the spindle nut (2), said external deflector (7) comprising two ball openings (E1, E2), each of which is connected to an end of the load-bearing channel (6) to deflect the balls (5) from one end of the load-bearing channel (6) to the other end of the load-bearing channel (6), the external deflector (7) extends from one of the two ball openings (E1) to the other of the two ball openings (E2) at least approximately over one full winding about an axis of rotation of the spindle nut (2).