Patent · US Active

Variable ratio transmission for distributing a drive torque to at least two output shafts

US8272989B2 · kind B2 · utility

6Cited by

8References

7Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Detlef Baasch · Friedrichshafen, DE
Christoph Pelchen · Tettnang, DE
Thomas Rosemeier · Meckenbeuren, DE

Key dates

Filing date	Apr 24, 2008
Grant date	Sep 25, 2012
Priority date	—
Expiry date	Jun 19, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2048/204
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A variable-ratio transmission for distributing a drive torque to at least two drive output shafts (8, 9), comprising a conventional differential (1) is proposed, which comprises an electric motor (5) for distributing the drive torque directly between the drive output shafts (8, 9) and a plus planetary gearset (2) that serves as a variable-ratio unit, such that the plus planetary gearset (2) is arranged coaxially with a drive input shaft (8), the outer sun gear (3) of the plus planetary gearset (2) is connected to the output (8), on the side of the differential (1) facing toward the planetary gearset (2), and the web (4) of the planetary gearset (2) is connected to the electric motor (5), and such that the inner sun gear (6) of the planetary gearset (2) is connected by a countershaft (7) to the other drive output shaft (9).

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