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Servo-assisted device for motor vehicle switching gearbox

A technology for motor vehicle transmissions, support devices, used in transmission control, mechanical equipment, elements with teeth, etc.

Active Publication Date: 2010-11-24
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consequence of this is that the selector lever is actuated relatively far beyond its engaged gear position, at most until the mechanical overlap of the servo support takes effect

Method used

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  • Servo-assisted device for motor vehicle switching gearbox
  • Servo-assisted device for motor vehicle switching gearbox
  • Servo-assisted device for motor vehicle switching gearbox

Examples

Experimental program
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Embodiment Construction

[0025] figure 1A schematic diagram of a motor vehicle gearshift system 2 according to the prior art is shown. Proceeding from the selector lever 4 , the selector slide rod 6 is guided via a lever deflection 8 to a selector 11 with a pneumatic actuating support 10 . The pneumatic servo support device 10 has a connecting line 12 which leads to a storage container 14 from which the pneumatic servo support device 10 is supplied with compressed air. The lever steering 8 has a first lever 16 which is preferably articulatedly connected to the selector rod 6 . The lever deflection 8 has a second lever 18 which in turn engages in a control rod 20 arranged in the pneumatic actuating support 10 . Furthermore, a piston rod 22 is arranged in the pneumatic actuating support device 10 , into which a lever 24 engages, which is connected via a rotatable shift shaft 26 to a lever 28 in the vehicle transmission 30 . The lever 28 engages in a shift rail 32 via which the gear ratios of the tran...

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PUM

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Abstract

The invention relates to a servo-assisted device (10) for a switching arrangement (11) on a motor vehicle gearbox, comprising a control rod (20), on which a manual switching force for assistance acts, a piston rod (22) and at least one spring element (40), arranged on the control rod (20) and radially within the piston rod (22). According to the invention, the spring element (40) is arranged on the control rod (20) such that in one or both operating directions of the control rod (20) a play (50, 52) is provided between the spring element (40) and the piston rod (22).

Description

technical field [0001] The invention relates to a servo support device for a shifting device of a motor vehicle transmission of the type defined in detail in the preamble of claim 1 . Background technique [0002] Today's commercial vehicles, such as passenger cars and trucks, with their cabover design, have space constraints for the installation of transmissions, wherein the transmissions are forced to be moved away from the driver's seat. The distance is particularly long on cars with low-mounted or rear-mounted engines. Due to the very long and sometimes tense operation of the gear levers in mechanically shifted transmissions, it is often difficult to change gears precisely. [0003] In order for the motor vehicle driver to concentrate his attention entirely on the road, he must be as relaxed and supported as possible in all operations for driving the motor vehicle. [0004] Pneumatic shifting aids are known in decentralized construction, which consist of a mechanical-p...

Claims

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Application Information

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IPC IPC(8): F16H61/30
CPCF16H61/30F16H2061/301
Inventor 迪特尔·菲舍尔克劳斯·施帕特
Owner ZF FRIEDRICHSHAFEN AG
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