Actuator having a planetary roller screw drive

US10663044B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Peter Greb · Ottersweier, DE
• Alexander Dreher · Baden-Baden, DE
• Lars Schumann · Laufenburg (Baden), DE
• Laszlo Man · Bühl, DE

Key dates

• Filing date: Mar 14, 2016
• Grant date: May 26, 2020
• Expiry date: Nov 15, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2025/2271
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The disclosure relates to an actuator having a planetary roller screw drive comprising a housing having a cylinder chamber and a fluid reservoir forming one common volume and the housing is filled with a hydraulic fluid. The planetary roller screw drive comprises a spindle having a profiling, which meshes with a plurality of planetary rollers, which are arranged around the spindle and are supported at both ends in a planetary roller carrier. The planetary rollers mesh with an inner profiling of an internal ring gear surrounding the planetary rollers and the planetary rollers are supported in a sleeve surrounding the internal ring gear. According to the disclosure, the planetary roller carrier and/or the sleeve comprise one or more flow ducts connecting the interior and the exterior of a chamber defined radially by the sleeve and axially by the planetary roller carriers to one another.