Planetary gearing and planet pin for a planetary gearing

US10767755B2 · 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: Sep 8, 2020
• Expiry date: Nov 21, 2038

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; a ring gear engaging the planet gears; and a plurality of planet pins that respectively include an outer-side abutment surface having an axially forward end and an axially rearward end. Respectively, one planet pin is arranged inside a planet gear, and the planet pin and the planet gear form 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. The planet pins respectively form a crowning at their abutment surface such that their outer diameter decreases from a maximum outer diameter towards at least one axial end of the abutment surface, and has a minimum at the axial end.