Patent · US Active

Multi-stage gearbox of planetary construction

US8721492B2 · kind B2 · utility

81Cited by

17References

14Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Martin Fellmann · Passau, DE
Stefan Beck · Eriskirch, DE
Gerhard Gumpoltsberger · Friedrichshafen, DE

Key dates

Filing date	Nov 21, 2011
Grant date	May 13, 2014
Priority date	—
Expiry date	Nov 21, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2200/2097
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A multi-stage gearbox of planetary construction, in particular a power split transmission of a work engine, having a housing which accommodates four planetary sets, several shafts and several shift elements including at least a brake and a number of clutches. Selective engagement of the shift elements implements different gear ratios between a drive shaft and an output shaft. The drive shaft is connected to a carrier of the second planetary set while the sun gear of the second planetary set is coupled with a third shaft and the ring gear of the second planetary set is coupled with a fourth shaft. The output shaft is connected to a carrier of the fourth planetary set, and a fifth shaft is firmly connectable to the housing by a first brake.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.