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Electromagnetically actuated transmission brake

A transmission system and brake technology, which is applied in transmission devices, gear transmission devices, brake actuators, etc., and can solve problems such as large structural space

Inactive Publication Date: 2006-01-25
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the driveline brakes in some vehicles are the only devices that require hydraulic or pneumatic operation or control pressure, installing them on such vehicles represents a non-negligible cost factor
For this reason, a fundamental drawback of fluid-operated driveline brakes in a piston-cylinder arrangement is that they require considerable control for their additional control components (such as solenoid valves) in an already very narrow area of ​​the vehicle. large structural space

Method used

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  • Electromagnetically actuated transmission brake

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Embodiment Construction

[0017] The drive train brake 1 therefore extends part of its axial length in the opening of the gearbox housing 2 . Furthermore, in the region of the transmission housing 2 , the drive shaft 3 protrudes into the drive train brake 1 with an external spline 10 . The radially outwardly facing friction bodies 4 are fastened to this plug-in engagement 10 in a rotationally fixed and axially displaceable manner. In the interspace between the radially outward friction bodies 4 , radially inward friction bodies 5 engage, which are arranged in a rotationally fixed and axially displaceable manner on the edge of the so-called transmission housing opening on the inner spline 11 . The friction bodies 4 , 5 are preferably designed as brake plates in this respect.

[0018] In the area of ​​the side of the gearbox housing wall 2 remote from the drive shaft 3 , a half-shell-shaped housing 13 of the drive train brake 1 is arranged, which is connected to the gearbox housing wall 2 via fastening ...

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PUM

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Abstract

A transmission brake ( 1 ) is described, where one transmission shaft ( 3 ) can be braked to carry out an upshift operation. The aim of the invention is to provide a transmission brake that is devoid of any hydraulic or pneumatic actuation device and that requires very little axial installation space. Such a transmission brake ( 1 ) has one electromagnetic actuation device ( 6, 7, 8 ) with which the friction elements ( 4, 5 ) of the transmission brake ( 1 ) can be pressed against each other for actuating the brake.

Description

technical field [0001] The invention relates to a drive train brake with a housing, at least one friction body arranged in a rotationally fixed manner relative to the housing, at least one friction body fastened to the drive shaft to be braked, and an actuating device by means of which the The operating part is pressed axially against these friction bodies. Background technique [0002] Such a drive train brake is known, for example, from DE 196 52 916 A1. In the case of an automatic transmission with intermediate shaft structure, if during the high gear shifting process, it is necessary to reduce the speed of the higher gear transmission gear for speed synchronization, then the use of such a drive train brake can effectively brake the upper fixed gear. The rotational speed of the intermediate shaft of the gear. For this braking operation, the known drive train brake has opposing brake plates which are arranged in a rotationally fixed and axially displaceable manner on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/12F16D65/18
CPCF16H3/12
Inventor 斯特凡·伦纳赖纳·凯勒马库斯·乌布利希
Owner ZF FRIEDRICHSHAFEN AG