Patent · US Active

Planetary gear device with two sun gears having different diameters

US8057351B2 · kind B2 · utility

4Cited by

7References

15Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Franz-Josef Joachim · Bodolz, DE
Karl Benkler · Garmisch-Partenkirchen, DE
Klemens Humm · Markdorf, DE
Klaus-Peter Brenner · Schwäbisch Gmünd, DE

Key dates

Filing date	Nov 16, 2007
Grant date	Nov 15, 2011
Priority date	—
Expiry date	Jul 28, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19953
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A planetary gear device having two sun gears with different diameters that engage with double planet gears having a first gear teeth area, which interacts with the fist sun gear, and a second gear teeth area, which interacts with the second sun gear. The double planet gears are continuous helical gear wheels. The crown circle diameters of the gear teeth areas of the double planet gears and the crown circle diameters of the sun gears are adapted such that the pitch circle diameters between the double planet gears and the sun gears are arranged in the center between the crown circle diameters and the effective root diameters of the gear teeth areas of the double planet gears and the sun gears.

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