Friction roller planetary gearing and speed-changing and differential gearing

US9341245B2 · kind B2 · utility

Assignee

• VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

• Rainer Petersen · Wolfsburg, DE
• Jörg Möckel · Chemnitz, DE
• Andreas Lutz · Bad Abbach, DE
• Stefan Hanke · Braunschweig, DE

Key dates

• Filing date: Nov 6, 2014
• Grant date: May 17, 2016
• Expiry date: Nov 6, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/72
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A friction roller planetary gearing includes a first and a second sun which are axially displaceable with respect to one another and at least one of the suns is connected for conjoint rotation to a sun shaft. Stepped planets roll on the suns, on a first annulus and on a second annulus. The suns, the annuluses and the stepped planets are configured as friction rings. The second annulus is axially displaceable relative to the first annulus. A first torque-dependent axial displacement device controls a contact pressure between the suns and contact surfaces of the planets by using a torque-dependent axial displacement of at least one of the suns. A second torque-dependent axial displacement device controls a contact pressure between the annuluses and contact surfaces of the planets by using a torque-dependent axial displacement of at least one of the annuluses.