The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2020
Filed:
Nov. 21, 2018
Rolls-royce Deutschland Ltd & CO KG, Blankenfelde-Mahlow, DE;
Rolls-royce Plc, London, GB;
Michael Nique, Berlin, DE;
Paul Gorenz, Berlin, DE;
Christopher Campbell, Berlin, DE;
Frank Wagner, Bruchsal, DE;
Mark Spruce, Bristol, GB;
Daren Ashmore, Nottingham, GB;
ROLLS-ROYCE DEUTSCHLAND LTD & CO KG, Blankenfelde-Mahlow, DE;
ROLLS-ROYCE PLC, London, GB;
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.