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Driving cylinder

A technology of active cylinders and brakes, applied in brake actuators, fluid-driven clutches, non-mechanical drive clutches, etc., can solve problems such as leakage

Active Publication Date: 2015-03-18
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This "rosette shape" thus causes the sealing lip to no longer rest completely against the piston during operation, which can cause leakage

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0027] figure 1 A pressure medium actuating device 1 is shown which has an actuating actuator 2 with an output element 3 which is connected via a connecting rod 4 to a piston 5 of a master cylinder 6 . The piston 5 is arranged axially displaceable in the cylinder 7 of the master cylinder 6 so that the volume of the working pressure chamber or pressure chamber 8 can be varied so that a fluid, in this case a pressure medium, can be acted upon from The pressure chamber 8 enters via a connecting line 9 into a second pressure chamber 10 of another piston-cylinder unit, also referred to as a slave cylinder 11 . The piston 12 in the cylinder 13 of the slave cylinder 11 thus moves in the axial direction and can actuate, eg engage or disengage, via the connecting rod 14 and the lever 15 or other connecting elements, for example, the clutch 16 . In alternative embodiments, the element to be actuated can also be a transmission element or the like.

[0028] The master cylinder 6 also has ...

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PUM

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Abstract

The invention relates to a driving cylinder for a hydraulically actuated clutch or brake comprising a housing, a movable at least in a rear parking position in the housing piston, a pressure chamber in which, through a displacement of the piston in the direction of the pressure chamber, a pressure can be built, at least one sniffer hole in the housing for at least temporary connection with the pressure chamber, at least one seal to separate the snifting bore from the pressure chamber, the piston, to avoid immersion of the seal in circumferentially distributed depressions such as grooves at least one vent hole for at least temporarily establishing a connection between the snifting bore, and having the pressure chamber.

Description

technical field [0001] The invention relates to a master cylinder for a hydraulic clutch or brake. Background technique [0002] A master cylinder, in particular a master cylinder of a pressure medium actuating device, such as in particular a hydraulic actuating device, has a cylinder with a piston movably arranged therein, at least one of which is provided between the piston wall and the cylinder wall. Sealing structure in order to ensure the sealing between the piston and the cylinder. [0003] An annular seal is used for this, which is inserted into an annular groove in the wall of the piston or of the cylinder and bears sealingly against the wall of the piston and of the cylinder during operation of the master cylinder. In this case, the seal usually has a stationary sealing lip which is supported essentially stationary on the wall. Furthermore, the seal has a moving sealing lip which, during a relative movement of the piston wall and the cylinder wall, bears against o...

Claims

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Application Information

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IPC IPC(8): F16D25/06F16D65/14F16D121/04F16D125/04
CPCF16D2025/081F16D25/08F15B7/08F16D25/088F15B15/20F16D2048/0218F16D2300/08
Inventor 亚历山德·德雷埃尔马尔科·博罗夫斯基马尔科·特雷德
Owner SCHAEFFLER TECH AG & CO KG
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