Operating device with gate shafts

US8490509B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Andreas Giefer · Bohmte, DE
• Ludger Rake · Diepholz, DE

Key dates

• Filing date: Dec 4, 2008
• Grant date: Jul 23, 2013
• Expiry date: Nov 26, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2014
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An actuating device for a gear shifting transmission. The actuating device includes a selector lever which has stable selector lever positions, and a detent mechanism with a detent element and notched gate, the detent element is connected to the selector lever. The notched gate is disposed on a gate shaft that rotates when actuated. The gate shaft includes at least one helical return groove for the detent element. Due to rotation of the gate shaft, the detent element can be transferred from a start position, along the return groove, into a target position. The selector lever position always reflects the actual gear stage of the transmission, even with shift-by-wire-controlled gear shifting transmissions. The driver is provided with reliable visual and tactile feedback about the gear state of the transmission. The actuating device is structurally reliable, has low energy consumption, produces minimal noise, and requires minimal construction space.