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Hydraulic actuators for operating friction clutches

A friction clutch and actuator technology, applied in the field of power transmission, can solve the problems of failure of pressure balance function and inability to reliably prevent water from entering, etc.

Active Publication Date: 2019-09-24
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a seal with a Gore membrane, which however only allows a flow rate of up to 15 liters per hour and has not been able to reliably prevent water from entering
In addition, the pressure equalization function can be completely disabled by contact with oil or grease

Method used

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  • Hydraulic actuators for operating friction clutches
  • Hydraulic actuators for operating friction clutches
  • Hydraulic actuators for operating friction clutches

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] exist figure 1 A hydraulic actuator 1 is schematically shown in FIG. 1 , wherein the electronics compartment 40 is connected to the mechanical compartment 57 in which the spindle drive 35 with the spindle 36 is located. The main shaft drive 35 is fixedly connected here to the hydraulic piston 5 or its rear side 7, so that the hydraulic piston 5 can move axially in the hydraulic cylinder 3, here parallel to the main shaft 36 of the friction clutch 2 (cf. Figure 9 )move. The hydraulic cylinder 3 is sealed from the drying chamber 4 by means of an inner primary seal 38 and an outer primary seal 37 and a secondary seal 39 . In this case, the outer seal 37 is mainly provided to ensure a minimum volume in the hydraulic cylinder 3 or in the connected hydraulic system (not shown here: hydraulic line and slave cylinder). For this purpose, the hydraulic cylinder 3 is connected to a compensating container 33 in which hydraulic fluid is stored. The pressure in the compensating c...

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Abstract

The invention relates to a hydraulic actuator for actuating a friction clutch, said hydraulic actuator having at least the following components: at least one hydraulic cylinder for hydraulic fluid; at least one drying chamber; at least one movable in the hydraulic cylinder A hydraulic piston with an operating face facing the hydraulic fluid and a rear side facing the drying chamber; and at least one air outlet for pressure equalization between the drying chamber and the surrounding environment, characterized in that the at least one air outlet comprises at least A passive one-way valve. A reliable air outflow from the drying chamber is achieved by means of the hydraulic actuator proposed here, which is at the same time designed in a space-saving manner.

Description

technical field [0001] The invention relates to a hydraulic actuator for actuating a friction clutch with a rotary shaft for detachably connecting a driven shaft to a consumer, and to a friction clutch, in particular for a machine The power train of the motor vehicle. Background technique [0002] Hydraulic actuators are known from the prior art, in particular hydrostatic (or hydraulic) clutch actuators (HCA - English: Hydrostatic Clutch Actuator), wherein a hydraulic piston in a hydraulic slave cylinder driven by an electric motor Generates a hydraulic sensor signal or a compression or squeeze of hydraulic fluid in a hydraulic cylinder. The hydraulic piston is provided with a gas seal which separates the hydraulic fluid from the gas-filled, in particular air-filled, drying chamber. In particular, the friction clutch is thus actuated by an automatic transmission. When actuating such a friction clutch, there are usually sudden volume changes in the shortest possible time d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D25/12F15B15/20
CPCF16D25/12F16D2021/0615F16D2021/0669F16D2048/0218F16D2300/08F16D2048/0263F16D48/02F16D48/0206F16D2048/0209F16D2025/081F16D25/08F16D25/082F16D25/10F16D28/00F16D29/005
Inventor 马蒂亚斯·埃利希维克托·弗朗茨费利克斯·比努
Owner SCHAEFFLER TECH AG & CO KG
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