Transmission

US9447848B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Stefan Beck · Eriskirch, DE
• Johannes Kaltenbach · Friedrichshafen, DE
• Ulrich Kehr · Tettnang, DE
• Michael Trübenbach · Friedrichshafen, DE

Key dates

• Filing date: Nov 21, 2014
• Grant date: Sep 20, 2016
• Expiry date: Jan 21, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/62
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A transmission which has drive input and output shafts, a housing, two planetary gearsets (PR1, PR2), and at least three shifting elements which produce three gears or ratios. A ring gear of the gearset (PR1) and the input shaft are connected for forming a first shaft, a carrier of gearset (PR1) and the output shaft are connected for forming a second shaft, a ring gear of gearset (PR2) forms a third shaft, sun gears of gearsets (PR1, PR2) are connected for forming a fourth shaft, and carrier of gearset (PR2) couples the housing. The first shifting element is arranged in the force flow between the third shaft and the housing, the third shifting element is arranged in the force flow between the second and third shafts, and the second shifting element is arranged in the force flow either between the first and second shafts or the second and fourth shafts.