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Fluid pressure cylinder with information transmitter

A technology of information transmission and hydraulic cylinders, which is applied in the field of hydraulic cylinders and can solve problems such as magnetization and enlargement

Inactive Publication Date: 2009-09-16
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this has the disadvantage that a piston composed in this way has to undergo an additional process step, namely magnetization
But here the problem is that the fixation of the rod magnet in the piston can be increased without its radial construction space

Method used

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  • Fluid pressure cylinder with information transmitter
  • Fluid pressure cylinder with information transmitter
  • Fluid pressure cylinder with information transmitter

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Embodiment Construction

[0031] In the description, the reference numerals in the various figures are retained for the same components.

[0032] figure 1 A hydraulic cylinder is shown, as used in a hydraulic section for operating clutches or brakes. From figure 1 As can be seen in the left side view of , the hydraulic cylinder comprises a hollow-cylindrical housing 1 in which a piston 2 , which is also designed as a hollow cylinder, is axially movable. In this figure and the following figures, the piston rod, which is operatively connected to the piston, is not shown for reasons of simplification. Both the housing 1 and the piston 2 are preferably made of plastic here.

[0033]The piston 2 with the information element 3 can preferably be arranged in the hydraulic cylinder in such a way that the information element 3 is as close as possible to the receiver 5 . This position is advantageously located laterally with respect to the housing 1 of the hydraulic cylinder, since the upper and lower sides a...

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PUM

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Abstract

The present invention relates to a fluid pressure cylinder with a information transmitter, wherein the fluid pressure cylinder is sued for a hydraulic clutch or a brake operating system; the information transmitter is composed by a information element wherein the information element is set on a movable piston in the fluid pressure cylinder in axial direction. In order to make the information element to be positioned easily relative to the fluid pressure cylinder, machining bias is compensated at the same time in positioning and the positioning is remained when the positioning at work; the information element is fixed in a hollow cylindrical housing of the piston by means of a locking device of corresponding structure.

Description

technical field [0001] The invention relates to a hydraulic cylinder with a transmitter for a hydraulic clutch or brake actuation system. Background technique [0002] In order to detect the axial position of the piston with respect to its housing, the hydraulic cylinder, eg a hydraulic clutch operating device, suitable mechanical, electrical or magnetic devices are proposed in the prior art, eg in US 4,705,151 or DE 41 20 643 A1. DE 199 15 832 A1 discloses a master cylinder having a piston arranged longitudinally displaceable in a housing. The piston has an annular groove for receiving an information element designed as an annular magnet. A housing part is seated on the housing of the master cylinder, in which housing part two Hall transducers, an associated evaluation electronics and a connecting contact are arranged. The position of the ring magnet and thus the piston is detected by means of a Hall transducer through the wall of the master cylinder housing, whereupon th...

Claims

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Application Information

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IPC IPC(8): F15B15/08F15B15/20
CPCF15B2215/305F15B15/1447F15B15/2815
Inventor A·斯塔弗尔M·迪特里希
Owner SCHAEFFLER TECH AG & CO KG