Patent · US Active

Multi-stage transmission

US9080648B2 · kind B2 · utility

5Cited by

8References

9Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Peter Ziemer · Tettnang, DE
Stefan Beck · Eriskirch, DE
Timo Wehlen · Friedrichshafen, DE

Key dates

Filing date	Mar 13, 2013
Grant date	Jul 14, 2015
Priority date	—
Expiry date	Mar 13, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/62
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A two-step multi-step transmission in which a first planetary gear set (1) has two radially nested transmission sub-assemblies. The first planetary gearset has an inner sun gear (11), inner planetary gears (12), an outer sun gear (14) which is rotationally fixed to the inner ring gear (13), outer planetary gears (15), an outer ring gear (16), and a carrier (17) on which the inner planetary gears (12) and the outer planetary gears (15) are mounted. The inner ring gear (13) and the outer sun gear (14), respectively, are rotationally fixed to a second, traditionally designed planetary gear set (2) and can be locked via a brake (42).

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