Hydrostatic actuator with a split dynamic seal portion

A dynamic sealing and hydrostatic technology, applied in fluid-driven clutches, non-mechanical-driven clutches, clutches, etc., can solve the problems of increased unit complexity, unfavorable thermal efficiency, and no longer guaranteed, so as to simplify the construction process, improve flexibility, Effect of reliable sealing function

Inactive Publication Date: 2019-05-24
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the one hand this prior art has the disadvantage that additional heating elements are connected to the circuit in order to provide heat
This brings about an additional interface which increases the complexity of the unit
Furthermore, such a heating element is disadvant

Method used

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  • Hydrostatic actuator with a split dynamic seal portion
  • Hydrostatic actuator with a split dynamic seal portion

Examples

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Embodiment Construction

[0027] figure 1 A schematic diagram of a hydrostatic actuator 1 according to the invention is shown. The hydrostatic actuator has a piston 2 arranged around an axis of rotation, which is arranged longitudinally displaceable within a housing 3 , which is mounted, for example, fixed to a motor. The piston 2 has a radially outwardly directed casing surface 4 which has a surface characteristic such that a seal 5 can bear against the casing surface in an effective and completely sealing manner. The seal 5 can be divided into a fastening area 6 and a sealing lip area 7 . The fastening area 6 is designed as a static seal, since the fastening area does not perform a relative movement with respect to the housing 3 . In contrast to this, the sealing lip region 7 is designed dynamically, since the piston 2 can be displaced longitudinally, so that a relative movement occurs between the sealing lip region 7 and the piston 2 .

[0028] In order to achieve effective sealing even under cha...

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PUM

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Abstract

The invention relates to a hydrostatic actuator (1) for a motor vehicle assembly, comprising a piston (2) which is arranged within a housing (3) in a longitudinally movable manner. A seal (5) is inserted between the lateral surface (4) of the piston (2) and the housing (3) in a fluid-tight manner, and the seal (5) has a securing region (6), which rests against the housing (3) or the piston (2) ina statically sealing manner, and a seal lip region (7), which rests against the piston (2) or the housing (3) that can be moved relative to the securing region (6) in a dynamically sealing manner. Theseal lip region (7) has two seal lips (8, 9), one of which is provided for contacting the surface of the piston (2) or the housing (3) that can be moved relative to the securing region (6) in the event of positive pressure and the other of which contacts same in the event of negative pressure for dynamic sealing purposes.

Description

technical field [0001] The invention relates to a hydrostatic actuator for a motor vehicle assembly having a piston which is arranged longitudinally displaceable in a housing. A seal is inserted in a fluid-tight manner between the casing of the piston and the housing. The seal has a fastening region at which it rests or is mounted / fixed in a static-tight manner on the housing or the piston, and has a sealing lip region, the The seal is in dynamic sealing contact with the piston or the housing in the area of ​​the sealing lip, the piston being displaceable / displaceable with respect to the fastening area. Such hydrostatic actuators are used, for example, to actuate clutches or brakes and offer the advantage that high forces can be transmitted by means of the actuator due to the at least barely incompressible hydraulic fluid with flexible force transmission paths. Background technique [0002] Such hydrostatic actuators are known from the prior art. German patent application...

Claims

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Application Information

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IPC IPC(8): F16D25/08
CPCF16D2125/08F16D25/08F15B15/1452F15B15/1461F15B15/1466F15B7/08F16D25/087F16J9/12
Inventor 马蒂亚斯·埃利希
Owner SCHAEFFLER TECH AG & CO KG
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