Planetary gearing and planet pin for a planetary gearing

US10816087B2 · kind B2 · utility

Assignees

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

Inventors

• Michael Nique · Berlin, DE
• Christopher M. Campbell · Berlin, DE
• Mark Spruce · Derby, GB

Key dates

• Filing date: Nov 21, 2018
• Grant date: Oct 27, 2020
• Expiry date: Jan 3, 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; a plurality of planet gears, a ring gear; and a plurality of planet pins, wherein respectively one planet pin is arranged inside a planet gear, and the planet pin and the planet gear form a lubricated journal bearing. The planet pin includes an axial bore and an inner surface that comprises an axially forward end and an axially rearward end. The inner diameter of the axial bore of the planet pin varies between the axially forward end and the axially rearward end of the inner surface and has a maximum at least at one axial end. 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 an axial end of the abutment surface, and has a minimum at the axial end.