Patent · US Expired

12-Speed gearbox for utility vehicles

US6347556B1 · kind B1 · utility

1Cited by

3References

8Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Rudiger Nitzschke · Tettnang, DE
Bernd Schepperle · Konstanz, DE

Key dates

Filing date	Apr 26, 2000
Grant date	Feb 19, 2002
Priority date	—
Expiry date	Apr 26, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/1926
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

For a 12-speed transmission for utility vehicles in 2×3×2 construction, a shift lever (1) is proposed which is configured as a universal joint with a shift fork (2) and a reversing lever (3). The shift fork is supported pivotally jointly with the transmission while the reversing lever (3) is pivotally mounted on the shift fork. When the shift fork is actuated, the synchronization movement, which occurs upon engagement in a synchronization block, runs in opposite direction, when the reverse lever is shifted in the same direction. This makes it possible to shift through the six speeds of the main gear in one stroke with successive shift movements in opposite direction.

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