Ball screw

US7017437B1 · kind B1 · utility

Assignee

• Ina Schaeffler KG · DE

Inventors

• Alexander Zernickel · Herzogenaurach, DE
• Rolf Fleischhauer · Fürth, DE

Key dates

• Filing date: Nov 15, 2000
• Grant date: Mar 28, 2006
• Expiry date: Nov 15, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19767
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a ball screw drive comprising a spindle (1), a nut (3) surrounding the spindle (1), and balls (4) arranged between the spindle (1) and the nut (3), which balls (4) are in rolling contact with a screw track (2) formed on the spindle (1) and on corresponding screw tracks (7, 12) formed on rings arranged within the nut (3) comprises a deflecting region for returning the balls (4) from a run-out end of a common turn of the screw tracks (2, 7, 12) to a run-in end of this turn, the screw tracks (7, 12) of the rings arranged in the nut (3, 15) are made on front faces of these rings with the screw tracks (7, 12) of two adjacent rings defining together with the screw track (2) of the spindle (1, 18), an endless circulation channel for the balls (4).