Split power transmission to include a variable drive

US7396309B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Uwe Heitz · Markdorf, DE
• Gabor Diosi · Friedrichshafen, DE
• Jürgen Wafzig · Bermatingen, DE
• Gerhard Gumpoltsberger · Friedrichshafen, DE
• Bernd Vahlensieck · Markdorf, DE
• Pedro Casals · Tettnang, DE

Key dates

• Filing date: May 30, 2006
• Grant date: Jul 8, 2008
• Expiry date: Jan 30, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2037/0893
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A split power transmission with a variable drive, a brake, a clutch, an integrating transmission containing a planetary set, the internal gear forming the output of the transmission, and an additional planetary set located between the drive shaft and the transmission. A portion of the transmission drive shaft power is transferable to the transmission which includes a secondary shaft located axially parallel to the variable drive. The power of the variable drive is directed towards the integrating transmission via the secondary shaft by using a defined transmission ratio. Torque division in the low cruising range and is achieved by locking the brake connecting the internal gear of the planetary set located between the drive shaft, and the transmission to the unit. Whereas in the high cruising range, by engaging the clutch the sun gear of the transmission is interlocked with the internal gear of the transmission.