Multispeed transmission

US10876600B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Peter Ziemer · Tettnang, DE
• Kai Bornträger · Tettnang, DE
• Christoph Margraf · Markdorf, DE
• Andreas Beisswenger · Friedrichshafen, DE
• Stefan Brom · Friedrichshafen, DE

Key dates

• Filing date: Nov 9, 2017
• Grant date: Dec 29, 2020
• Expiry date: Nov 9, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2046
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A multi-speed transmission having drive and output shafts, three front-mounted and two rear-mounted planetary gearsets, six shift elements which are selectively engaged to render a speed of the drive shaft and speeds generated in the front gearsets to achieve at least one reverse and twelve forward gears via at least one of the rear gearsets transmissible as the output shaft speed. Four shift elements are assigned to the front gearsets and two shift elements are assigned to the rear gearsets. At least one of the front gearsets is fixed to an element of the rear gearsets, resulting in six different output speeds of the front gearsets being transmissible to at least one of the rear gearsets. If normalized to the input speed of the drive shaft, one of the six output speeds is less than 0, four are between 0 and 1, and one is equal to 1.