Planetary gearing

US11085523B2 · kind B2 · utility

Assignees

• ROLLS-ROYCE DEUTSCHLAND LTD & CO KG · DE
• ROLLS-ROYCE plc

Inventors

• Michael Nique · Berlin, DE
• Paul Gorenz · Berlin, DE
• Christopher M. Campbell · Berlin, DE
• Frank Wagner · Reiskirchen, DE
• Mark Spruce · Derby, GB
• Daren R. Ashmore · Nottingham, GB

Key dates

• Filing date: Nov 21, 2018
• Grant date: Aug 10, 2021
• Expiry date: May 16, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T50/60
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A planetary gearing includes a sun gear rotating about a rotation axis and driven by a sun shaft; planet gears driven by the sun gear, each planet gear having an axially forward face side and an axially rearward face side; a ring gear engaging the planet gears; and planet slide bearing pins, wherein respectively one planet slide bearing pin is arranged inside a planet gear forming a lubricated journal bearing. At an axially forward face side and/or axially rearward face side, each planet gear forms a recess that extends inside the planet gear starting from the face side, and the planet slide bearing pins respectively form one crowning at their abutment surface such that their outer diameter decreases from a maximum outer diameter to at least an axial end of the abutment surface and has a minimum at the axial end.