Planetary-gear speed-change transmission

US4823641A · kind A · utility

Assignee

• Zahnradfabrik Friedrichshafen AG · DE

Inventors

• Walter Kuhn · Friedrichshafen, DE
• Hans-Jurgen Muller · Solms, DE

Key dates

• Filing date: Dec 30, 1986
• Grant date: Apr 25, 1989
• Expiry date: Dec 30, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2023
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A planetary gear transmission having four or five forward speeds and which comprises three planetary gear sets with clutches and brakes for speed selection. The planet carriers of the sets are connected together and positively connected to the output shaft, while the planet gearing for the first two gear sets utilizes a planet gear of the second gear set which extends axially over both the first and second gear sets and meshes with the internal and sun gears of the second gear set, and a planet gear on the common planet carrier which meshes only with the internal gear of the first gear set and with the planet gear of the second gear set.