Gear box arrangement with a gear-shifting element safety device for preventing the engagement of multiple gears of a gearbox

US7938037B2 · kind B2 · utility

Assignees

• ZF FRIEDRICHSHAFEN AG · DE
• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Thomas John · Augsburg, DE
• Dieter Kraxner · Wurmberg, DE

Key dates

• Filing date: Jun 17, 2005
• Grant date: May 10, 2011
• Expiry date: Aug 27, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19251
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A gearbox arrangement for a drive train of a motor vehicle, such as a double clutch gearbox arrangement or a power shift gearbox arrangement, has at least one group of gear-shifting elements (1, 2) which can be actuated for engaging and disengaging at least one respective gear of the gearbox arrangement in that they are moved relative to a gearbox housing between at least one neutral position, in which no gear associated with the gear-shifting element is engaged, and at least one engaged-gear position, in which a gear associated with the gear-shifting element and the engaged-gear position is engaged. The arrangement according to the invention is characterised by at least one safety device (210) associated with the gear-shifting elements or with a group of gear-shifting elements, which takes a release position when all the gear-shifting elements are in their neutral position, and which can be moved from the release position to a safety position when one of the gear-shifting elements is moved into one of the engaged-gear positions, the safety device preventing the other gear-shifting elements from moving from their neutral position to an engaged-gear position.