WO2019041325A1 - 离合器分离系统用活塞密封组件及离合器分离系统 - Google Patents

离合器分离系统用活塞密封组件及离合器分离系统 Download PDF

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Publication number
WO2019041325A1
WO2019041325A1 PCT/CN2017/100286 CN2017100286W WO2019041325A1 WO 2019041325 A1 WO2019041325 A1 WO 2019041325A1 CN 2017100286 W CN2017100286 W CN 2017100286W WO 2019041325 A1 WO2019041325 A1 WO 2019041325A1
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WO
WIPO (PCT)
Prior art keywords
main lip
lip
clutch release
release system
skeleton
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PCT/CN2017/100286
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English (en)
French (fr)
Inventor
刘鑫
张岳林
韩明
Original Assignee
舍弗勒技术股份两合公司
刘鑫
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 舍弗勒技术股份两合公司, 刘鑫 filed Critical 舍弗勒技术股份两合公司
Priority to CN201780094309.3A priority Critical patent/CN111051723B/zh
Priority to DE112017007969.1T priority patent/DE112017007969T5/de
Priority to PCT/CN2017/100286 priority patent/WO2019041325A1/zh
Publication of WO2019041325A1 publication Critical patent/WO2019041325A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
    • F16D25/083—Actuators therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84

Definitions

  • the present invention relates to the field of sealing, and in particular to a piston seal assembly for a clutch release system and a clutch release system using the same.
  • the clutch release system includes a centering sub-cylinder 10 and a clutch release bearing 20 that are mounted together.
  • An annular hydraulic chamber 101 is formed in the center sub-cylinder 10, and a piston seal 103 is mounted at an axial end of the cylindrical piston 102, and the piston seal 103 is reciprocally movable in the oil pressure chamber 101.
  • the hydraulic chamber 101 is housed in a sliding manner.
  • the piston seal 103 reciprocates along the axial direction A together with the piston 102.
  • the other end of the piston 102 on the axial side can abut the clutch release bearing 20 in the axial direction A by the retaining ring.
  • the piston seal 103 since the piston seal 103 reciprocally slides in the oil pressure chamber 101, a dynamic seal is achieved between the seal lip of the piston seal 103 and the wall surface forming the oil pressure chamber 101.
  • the sealing lip of the piston seal 103 is designed to be very thick and has a very large amount of interference in the radial direction R with the wall surface forming the oil pressure chamber 101. . Therefore, during the reciprocating sliding of the piston seal 103 in the oil pressure chamber 101, the piston seal 103 and the wall surface forming the oil pressure chamber 101 will generate a large friction, thereby causing the seal lip of the piston seal 103 to wear very much. fast.
  • the entire piston seal 103 is integrally formed of an elastic material such as rubber, the deformation of the seal lip of the piston seal 103 is apt to affect each other. Therefore, the piston seal 103 is easily broken.
  • the present invention has been made based on the above problems of the prior art. SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel piston seal assembly for a clutch release system that eliminates the mutual influence of deformation of each seal lip of the piston seal assembly, thereby making the piston seal assembly less prone to failure and improving the overall strength of the entire piston seal assembly. To be able to withstand greater pressure. Another object of the present invention is to provide a clutch separation system using the piston seal assembly for the clutch release system described above.
  • the present invention adopts the following technical solutions.
  • the present invention provides a piston seal assembly for a clutch release system, the piston seal assembly including: a skeleton having an annular shape, and the skeleton extending along a longitudinal direction thereof by a predetermined length; and a sealing portion a sealing portion attached to the skeleton and extending over the entire circumference along a circumference of the skeleton, the sealing portion including a first main lip and a second main lip, the first main lip being a radially outer side of the skeleton extends radially outward, the second main lip extending from a radially inner side of the skeleton toward a radially inner side such that the first main lip and the second main lip Separated by the skeleton.
  • the first main lip extends toward the radially outer side while extending toward one side in the axial direction
  • the second main lip extends toward the radially inner side while extending toward one side in the axial direction
  • the sealing portion includes a first supporting lip extending from a radially outer side surface of the skeleton toward a radially outer side and/or a second supporting lip extending radially inward from a radially inner side surface of the skeleton unit.
  • the first supporting lip is formed integrally with the first main lip, and the first supporting lip is tapered outward from a root connected to the first main lip, and/
  • the second support lip is formed integrally with the second main lip, and the second support lip tapers radially inward from a root connected to the second main lip.
  • the first main lip extends to a radially outer side of the first support lip, and/or the second main lip extends to the second support Radial of the lip Inside.
  • the first main lip is formed with a plurality of first protrusions from a radially outer side surface of the first main lip a raised portion; and/or at a portion of the second main lip adjacent to a free end thereof, the second main lip is formed to protrude from a radially inner side of the second main lip a plurality of second raised portions.
  • the plurality of first protrusions are spaced apart from each other in the axial direction to form a recess between the adjacent two of the first protrusions, and/or the plurality of second The bosses are spaced apart from each other in the axial direction to form a recess between the adjacent two of the second bosses.
  • the first convex portion tapers from a radially outer side surface of the first main lip toward a radially outer side, and/or a diameter of the second convex portion from the second main lip portion
  • the inner side is tapered toward the radially inner side.
  • the sealing portion further includes a snap portion formed at an end of the other axial side of the bobbin, the snap portion and the first main lip portion and the first portion
  • the two main lips are formed in one piece.
  • the first supporting lip is located between the first main lip and the snap portion, and/or the second supporting lip is located at the Between the second main lip and the snap portion.
  • the skeleton is made of a hard material
  • the sealing portion is made of a soft material having elasticity, the hardness of the soft material being less than the hardness of the hard material.
  • the present invention also provides a clutch disengagement system, characterized in that the clutch disengagement system includes the piston seal assembly for a clutch disengagement system according to any one of the above aspects.
  • the clutch release system includes an annular oil pressure chamber, and the clutch release system is mounted to the piston by a piston seal assembly and is housed in the oil pressure chamber so as to be reciprocally slidable in the oil pressure chamber.
  • a first main lip of the sealing portion and a radial outer side surface forming the oil pressure chamber Forming a contact seal and the first support lip of the seal portion forms a contact seal or gap seal with the radially outer side surface, and/or the second main lip portion of the seal portion and the radial direction forming the oil pressure chamber
  • the inner side forms a contact seal and the second support lip of the seal forms a contact seal or gap seal with the radially inner side.
  • the amount of compressive deformation of the first main lip of the sealing portion is greater than the amount of compressive deformation of the first supporting lip of the sealing portion, and/or the amount of compressive deformation of the second main lip of the sealing portion An amount of compressive deformation greater than the second support lip of the sealing portion.
  • the first main lip of the seal portion is always in contact with the radially outer side surface forming the oil pressure chamber.
  • Forming a chamber between the first raised portion of the first main lip and the radially outer side, and the second main lip of the seal portion is always in a radial direction forming the oil pressure chamber Side contact to form a chamber between the second raised portion of the first main lip and the radially inner side.
  • the present invention provides a novel piston seal assembly for a clutch release system and a clutch release system using the same, which provides a seal lip located at a radially outer side and a radial path by providing a skeleton
  • the inner sealing lip is completely separated, which simply and effectively eliminates the mutual influence of the deformation of the sealing lips of the piston sealing assembly, so that the piston sealing assembly is not easily broken; in addition, the skeleton makes the strength of the entire piston sealing assembly increase, thereby being able to withstand more Great pressure.
  • FIG. 1 is a partial cross-sectional view of a prior art clutch disengagement system.
  • FIG. 2a is a partial cross-sectional view showing a piston seal assembly for a clutch release system according to a first embodiment of the present invention
  • FIG. 2b is a partial cross-sectional view showing a piston seal assembly for a clutch release system according to a second embodiment of the present invention
  • 2c is a partial cross-sectional view showing a piston seal assembly for a clutch release system according to a third embodiment of the present invention.
  • the piston seal assembly for a clutch release system has an annular shape as a whole, and the axial and radial directions described in the following specific embodiments refer to the axial direction of the piston seal assembly (skeleton) for the clutch release system, unless otherwise specified. And radial.
  • axial side means the right side in FIGS. 2a to 2c, and "axial side” means the left side in FIGS. 2a to 2c.
  • a piston seal assembly for a clutch release system includes a skeleton 1 and a seal portion 2.
  • the skeleton 1 is made of a hard material such as metal and has a ring shape. In the section along the radial direction R, the skeleton 1 linearly extends a predetermined length along the axial direction A, so that the following first main lip 21 and second main lip 22 of the sealing portion 2 can be completely divided. Separated. In addition, the skeleton 1 enables the entire piston seal assembly to be stronger to withstand greater pressure. Such a piston seal assembly having a skeleton 1 enables the first main lip 21 and the second main lip 22 to have a smaller thickness and interference amount than the prior art sealing lip to reduce friction and wear, and has Better sealing performance.
  • the sealing portion 2 is made of an elastic soft material such as rubber, and the hardness of the soft material is smaller than the hardness of the hard material forming the skeleton 1.
  • the sealing portion 2 can be vulcanized or the like Attached to the skeleton 1.
  • the sealing portion 2 extends over the entire circumference along the circumferential direction of the skeleton 1.
  • the sealing portion 2 includes a first main lip portion 21, a second main lip portion 22, a first support lip portion 23, a second support lip portion 24, and a snap portion 25.
  • the first main lip portion 21 extends toward the radially outer side from the radially outer side surface of the bobbin 1 while extending toward the axial side
  • the second main lip portion 22 extends from the radially inner side surface of the bobbin 1 toward the radially inner side. At the same time, it extends toward the axial side. Since the first main lip portion 21 and the second main lip portion 22 are attached to the radially outer side surface and the radially inner side surface of the bobbin 1, respectively, the first main lip portion 21 and the second main lip portion 22 are completely separated by the bobbin 1 The first main lip 21 and the second main lip 22 are not affected by each other.
  • the free end of the first main lip portion 21 away from the frame 1 is for contacting the radially outer side surface forming the oil pressure chamber
  • the second main lip The free end of the portion 22 remote from the frame 1 is for contacting the radially inner side surface forming the oil pressure chamber.
  • the free end of the first main lip 21 and the free end of the second main lip 22 each extend a certain distance beyond the end of the axial side of the skeleton 1, the first main lip 21 A groove opening toward one side in the axial direction is formed between the free end portion and the free end portion of the second main lip portion 22.
  • the dimension of the groove in the radial direction R gradually increases from the other side of the axial direction toward the axial side.
  • the first main lip portion 21 is formed from the radially outer side surface of the first main lip portion 21 toward the diameter at a portion of the first main lip portion 21 near the free end portion thereof.
  • the three first convex portions 211 are spaced apart from each other in the axial direction A, and a concave portion is formed between the adjacent two first convex portions 211.
  • each of the first boss portions 211 is in contact with the radially outer side surface forming the oil pressure chamber such that the adjacent first boss portion 211 and the above A chamber is formed between the radially outer sides.
  • the labyrinth seal can be formed by the plurality of bosses 211; in addition, in the chamber The hydraulic oil is stored, and the sealing effect of the piston seal assembly on the oil pressure chamber is improved by the chamber containing the hydraulic oil; further, the hydraulic oil of the chamber can also play a lubricating role to lower the first main lip portion 21 and form the oil. Friction between the radially outer sides of the pressure chamber.
  • the axial width of the first boss portion 211 gradually decreases from the radially outer side surface of the first main lip portion 21 toward the radially outer side. In this way, it is possible to reduce the friction between the first boss portion 211 and the radially outer side surface forming the oil pressure chamber when the piston seal assembly slides within the oil pressure chamber.
  • first supporting lip portion 23 extends from the radially outer side surface of the bobbin 1 toward the radially outer side
  • the second supporting lip portion 24 extends from the radially inner side surface of the bobbin 1 toward the radially inner side.
  • first supporting lip portion 23 is integrally formed with the first main lip portion 21 and attached to the radially outer side surface of the skeleton 1
  • the second supporting lip portion 24 and the second main lip portion 22 are integrally formed. And attached to the radially inner side of the skeleton 1.
  • the length of extension of the first support lip 23 and the length of the second support lip 24 should ensure that the first support lip 23 and the second support lip are in the case where the piston seal assembly is mounted in the oil pressure chamber of the clutch release system. 24 is capable of contacting the wall surface forming the oil pressure chamber, thereby preventing the piston seal assembly from being skewed during sliding in the oil pressure chamber, thereby avoiding eccentric wear of the piston seal assembly.
  • the first main lip 21 extends to the radially outer side of the first support lip 23 and the second main lip 22 extends to the radially inner side of the second main lip 24.
  • the first main lip portion 21 forms a contact seal with the radially outer side surface forming the oil pressure chamber
  • the first support lip portion 23 Forming a contact seal or gap seal with the radially outer side surface
  • the second main lip portion 22 forms a contact seal with the radially inner side surface forming the oil pressure chamber
  • the second support lip portion 24 forms a contact seal or gap with the radially inner side surface Sealing; and causing the first main lip 21 to be compressed by the radially outer side forming the hydraulic chamber to be greater than the amount of deformation of the first support lip 23 compressed by the radially outer side, the second main lip 22 being The amount of deformation of the radially inner side surface forming the hydraulic pressure chamber is greater than
  • the amount of interference between the first main lip portion 21 and the second main lip portion 22 and the wall surface forming the oil pressure chamber is ensured to be larger than the first support lip portion 23 and the second support lip portion 24 and the wall surface forming the hydraulic pressure chamber.
  • the amount of interference between The first support lip 23 and the first support lip 23 and the first support lip 23 and the second support lip 24 are secured as the primary sealing means while the first main lip 21 and the second main lip 22 are secured as auxiliary sealing means The friction between the support lip 24 and the wall forming the oil pressure chamber.
  • the axial width of the first support lip 23 gradually decreases from the root portion of the first support lip 23 and the first main lip 21 toward the radially outer side
  • the second support The axial width of the lip portion 24 gradually decreases from the root portion of the second support lip portion 24 that is connected to the second main lip portion 22 toward the radially inner side.
  • the first support lip 23 and the second support lip 24 prevent the piston seal assembly from being skewed during sliding in the oil pressure chamber without excessive friction with the wall surface forming the oil pressure chamber;
  • the first support lip 23 and the second support lip 24 can also be used as a dust lip to prevent dust or particulate matter from the outside of the oil pressure chamber from entering the oil pressure chamber.
  • the engaging portion 25 is formed at the end of the other side of the skeleton 1 in the axial direction.
  • the dimension of the engaging portion 25 in the radial direction R gradually increases from the one end on the axial side toward the other side in the axial direction to form a substantially dovetail shape.
  • the catching portion 25 is for engaging with a snap groove of a piston of the clutch release system to ensure that the piston seal assembly can be fastened with the piston.
  • the first support lip 23 is located between the first main lip 21 and the catching portion 25, and the second support lip 24 is located between the second main lip 22 and the catching portion 25. position.
  • the position of the first main lip 21 in the axial direction A is the same as the position of the second main lip 22 in the axial direction A, the position of the first supporting lip 23 in the axial direction A and the The positions of the two support lips 24 in the axial direction A are the same.
  • the length of the skeleton 1 in the axial direction A ensures that the first main lip portion 21 and the first support lip portion 23 are completely separated from the second main lip portion 22 and the second support lip portion 24.
  • the skeleton 1 can also extend to the catching portion 25 such that the sealing portion 2 is substantially divided into two separate portions located radially outward and radially inward of the skeleton 1.
  • the basic structure of the piston seal assembly for a clutch release system according to the second embodiment of the present invention is substantially the same as that of the clutch seal assembly for a clutch release system according to the first embodiment of the present invention, and their The difference is that, in the present embodiment, at the portion of the second main lip 22 near the free end thereof, the second main lip portion 22 is formed from the radially inner side of the second main lip portion 22 toward the diameter.
  • the action of the second boss portion 221 having the above specific structure is similar to that of the first boss portion 211 described in the first embodiment, and will not be described in detail herein.
  • the piston seal assembly according to the second embodiment will have a better lubrication state and sealing performance than the first embodiment, and can be used in a more harsh environment.
  • the basic structure of the piston seal assembly for a clutch release system according to the third embodiment of the present invention is substantially the same as that of the clutch seal assembly for a clutch release system according to the first embodiment of the present invention, and their The difference is that in order to simplify the structure, only the first support lip 23 is present in this embodiment. In fact, in the present embodiment, only the second support lip portion 24 may be provided.
  • the detailed structure of the piston seal assembly for the clutch release system according to the present invention has been described in detail above.
  • the present invention also provides a clutch release system employing a piston seal assembly for a clutch release system having the above specific configuration, and other configurations of the clutch release system according to the present invention may be combined with the clutch separation system described in the background art.
  • the other structures are the same.
  • the clutch disengagement system according to the present invention includes an annular oil pressure chamber, and the piston seal assembly for a clutch disengagement system according to the present invention is attached to the piston through the engaging portion 25 and is housed in the oil pressure so as to be reciprocally slidable in the oil pressure chamber. Inside the cavity.
  • the first main lip portion 21 of the seal portion 2 is always in contact with the radially outer side surface forming the oil pressure chamber to be in the first main lip portion 21
  • convex portion 211 forms a chamber with the radially outer side surface
  • the second main lip portion 22 of the sealing portion 2 is always in contact with the radially inner side surface forming the oil pressure chamber to be the second portion of the second main lip portion 22
  • a cavity is formed between the raised portion 221 and the radially inner side surface; the first support lip portion 23 and the second support lip portion 24 ensure that the axial direction A of the piston seal assembly substantially coincides with the axial direction of the centering sub-cylinder, Thereby the piston seal assembly is prevented from being skewed during sliding.
  • the number of the first bosses 211 and the number of the second bosses 221 are not limited to the numbers described in the above embodiments, but are satisfied as long as the piston seal assembly is mounted to the oil pressure chamber.
  • the rising portion 211 and the second convex portion 221 may form a chamber for accommodating the hydraulic oil with the wall surface forming the hydraulic pressure chamber, and any number of the first convex portion 211 and the second convex portion 221 may be provided.
  • each of the main lips 21 and 22, each of the support lips 23 and 24, and the catching portion 25 are preferably integrally formed.
  • the piston seal assembly for a clutch release system has less friction and wear, has a longer service life, and has better sealing performance than the prior art piston seal 103.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

一种离合器分离系统用活塞密封组件及离合器分离系统，其中，活塞密封组件包括：骨架（1），其具有环形形状，并且骨架（1）沿着其轴向延伸预定长度；以及密封部（2），其附着于骨架（1）且沿着骨架（1）的周向在整周上延伸，密封部（2）包括第一主唇部（21）和第二主唇部（22），第一主唇部（21）从骨架（1）的径向外侧面朝向径向外侧延伸，第二主唇部（22）从骨架（1）的径向内侧面朝向径向内侧延伸，使得第一主唇部（21）和第二主唇部（22）被骨架（1）分隔开。通过设置骨架（1）使得位于径向外侧的第一主唇部（21）和位于径向内侧的第二主唇部（22）完全分隔开，简单有效地消除了活塞密封组件的各密封唇（21、22）的变形的相互影响，使得活塞密封组件不易失效；另外，骨架（1）使得整个活塞密封组件强度提高，从而能够承受更大的压力。

Description

离合器分离系统用活塞密封组件及离合器分离系统 技术领域
本发明涉及密封领域，具体地涉及离合器分离系统用活塞密封组件及采用该活塞密封组件的离合器分离系统。
背景技术
图1是示出了现有技术的离合器分离系统的结构的局部剖视示意图。如图1所示，该离合器分离系统包括安装在一起的对中式副缸10和离合器分离轴承20。对中式副缸10形成有环状的油压腔101，筒状的活塞102的轴向一侧的端部安装有活塞密封件103，该活塞密封件103以能够在该油压腔101内往复滑动的方式收纳于该油压腔101。在油压腔101填充/释放液压油的过程中，活塞密封件103与活塞102一起沿着轴向A往复滑动。活塞102的轴向另一侧的端部通过保持环能够在轴向A上抵接离合器分离轴承20。
在具有上述结构的离合器分离系统中，由于活塞密封件103在油压腔101内往复滑动，导致活塞密封件103的密封唇与形成油压腔101的壁面之间实现动态密封。为了使活塞密封件103能够密封具有非常大的压力的液压油，活塞密封件103的密封唇均被设计得非常厚并且与形成油压腔101的壁面在径向R上具有非常大的干涉量。因此，在活塞密封件103在油压腔101内往复滑动的过程中，活塞密封件103与形成油压腔101的壁面将产生很大的摩擦，从而导致活塞密封件103的密封唇的磨损非常快。
此外，由于整个活塞密封件103由例如橡胶等的弹性材料一体地形成，因此活塞密封件103的密封唇的变形易于互相影响。因此，活塞密封件103容易失效。
发明内容
基于上述现有技术的问题做出了本发明。本发明的发明目的在于提供一种新型的离合器分离系统用活塞密封组件，以消除活塞密封组件的各密封唇的变形的相互影响，从而使得活塞密封组件不易失效并且提高整个活塞密封组件的整体强度，从而能够承受更大的压力。本发明的另一发明目的在于提供一种采用上述离合器分离系统用活塞密封组件的离合器分离系统。
为了实现上述发明目的，本发明采用如下的技术方案。
本发明提供了一种如下的离合器分离系统用活塞密封组件，所述活塞密封组件包括：骨架，所述骨架具有环形形状，并且所述骨架沿着其轴向延伸预定长度；以及密封部，所述密封部附着于所述骨架且沿着所述骨架的周向在整周上延伸，所述密封部包括第一主唇部和第二主唇部，所述第一主唇部从所述骨架的径向外侧面朝向径向外侧延伸，所述第二主唇部从所述骨架的径向内侧面朝向径向内侧延伸，使得所述第一主唇部和所述第二主唇部被所述骨架分隔开。
优选地，所述第一主唇部朝向径向外侧延伸的同时朝向轴向一侧延伸，所述第二主唇部朝向径向内侧延伸的同时朝向轴向一侧延伸。
优选地，所述密封部包括从所述骨架的径向外侧面朝向径向外侧延伸的第一支撑唇部和/或从所述骨架的径向内侧面朝向径向内侧延伸的第二支撑唇部。
优选地，所述第一支撑唇部与所述第一主唇部形成为一体，所述第一支撑唇部从与所述第一主唇部连接的根部朝向径向外侧渐缩，并且/或者所述第二支撑唇部与所述第二主唇部形成为一体，所述第二支撑唇部从与所述第二主唇部连接的根部朝向径向内侧渐缩。
优选地，在所述骨架的径向上，所述第一主唇部延伸到所述第一支撑唇部的径向外侧，并且/或者，所述第二主唇部延伸到所述第二支撑唇部的径向 内侧。
优选地，在所述第一主唇部的靠近其自由端部的部分处，所述第一主唇部形成有从所述第一主唇部的径向外侧面凸出的多个第一凸起部；并且/或者在所述第二主唇部的靠近其自由端部的部分处，所述第二主唇部形成有从所述第二主唇部的径向内侧面凸出的多个第二凸起部。
优选地，所述多个第一凸起部在所述轴向上彼此间隔开，以在相邻的两个所述第一凸起部之间形成凹部，并且/或者所述多个第二凸起部在所述轴向上彼此间隔开，以在相邻的两个所述第二凸起部之间形成凹部。
优选地，所述第一凸起部从所述第一主唇部的径向外侧面朝向径向外侧渐缩，并且/或者所述第二凸起部从所述第二主唇部的径向内侧面朝向径向内侧渐缩。
优选地，所述密封部还包括卡接部，所述卡接部形成于所述骨架的轴向另一侧的端部，所述卡接部与所述第一主唇部和所述第二主唇部形成为一体。
优选地，在所述骨架的轴向上，所述第一支撑唇部位于所述第一主唇部和所述卡接部之间，并且/或者，所述第二支撑唇部位于所述第二主唇部和所述卡接部之间。
优选地，所述骨架由硬质材料制成，所述密封部由具有弹性的软质材料制成，所述软质材料的硬度小于所述硬质材料的硬度。
本发明还提供了一种如下的离合器分离系统，其特征在于，所述离合器分离系统包括以上技术方案中任意一项技术方案所述的离合器分离系统用活塞密封组件。
优选地，所述离合器分离系统包括环状的油压腔，所述离合器分离系统用活塞密封组件安装于活塞且以能够在所述油压腔内往复滑动的方式收纳于所述油压腔，所述密封部的第一主唇部与形成所述油压腔的径向外侧面形 成接触密封并且所述密封部的第一支撑唇部与该径向外侧面形成接触密封或间隙密封，并且/或者所述密封部的第二主唇部与形成所述油压腔的径向内侧面形成接触密封并且所述密封部的第二支撑唇部与该径向内侧面形成接触密封或间隙密封。
优选地，所述密封部的第一主唇部的压缩变形量大于所述密封部的第一支撑唇部的压缩变形量，并且/或者所述密封部的第二主唇部的压缩变形量大于所述密封部的第二支撑唇部的压缩变形量。
优选地，在所述离合器分离系统用活塞密封组件在所述油压腔内滑动的过程中，所述密封部的第一主唇部始终与形成所述油压腔的径向外侧面接触以在所述第一主唇部的第一凸起部与所述径向外侧面之间形成腔室，并且所述密封部的第二主唇部始终与形成所述油压腔的径向内侧面接触以在所述第一主唇部的第二凸起部与所述径向内侧面之间形成腔室。
通过采用上述技术方案，本发明提供了一种新型的离合器分离系统用活塞密封组件及采用该活塞密封组件的离合器分离系统，该活塞密封组件通过设置骨架使得位于径向外侧的密封唇和位于径向内侧的密封唇完全分隔开，简单有效地消除了活塞密封组件的各密封唇的变形的相互影响，使得活塞密封组件不易失效；另外，骨架使得整个活塞密封组件强度提高，从而能够承受更大的压力。
附图说明
图1是现有技术的离合器分离系统的局部剖视示意图。
图2a是根据本发明的第一实施方式的离合器分离系统用活塞密封组件的局部剖视示意图；图2b是根据本发明的第二实施方式的离合器分离系统用活塞密封组件的局部剖视示意图；图2c是根据本发明的第三实施方式的离合器分离系统用活塞密封组件的局部剖视示意图。
附图标记说明
10对中式副缸 101油压腔 102活塞 103活塞密封件 20离合器分离轴承
1骨架 2密封部 21第一主唇部 211第一凸起部 22第二主唇部 221第二凸起部 23第一支撑唇部 24第二支撑唇部 25卡接部
A轴向 R径向
具体实施方式
以下将基于说明书附图详细说明本发明的技术方案。根据本发明的离合器分离系统用活塞密封组件整体具有环形形状，如无特殊说明，在以下具体实施方式中说明的轴向和径向均是指离合器分离系统用活塞密封组件(骨架)的轴向和径向。另外，“轴向一侧”是指图2a至图2c中的右侧，“轴向另一侧”是指图2a至图2c中的左侧。
(第一实施方式)
如图2a所示，根据本发明的第一实施方式的离合器分离系统用活塞密封组件包括骨架1和密封部2。
在本实施方式中，骨架1由金属等的硬质材料制成并且具有环形形状。在沿着径向R的截面中，该骨架1沿着轴向A直线状地延伸预定长度，使得能够将密封部2的下述的第一主唇部21和第二主唇部22完全分隔开。另外，该骨架1能够使得整个活塞密封组件的强度更大以承受更大的压力。这种具有骨架1的活塞密封组件能够使第一主唇部21和第二主唇部22相比于现有技术的密封唇具有更小的厚度和干涉量以减小摩擦和磨损，并且具有更好的密封性能。
在本实施方式中，密封部2由橡胶等的具有弹性的软质材料制成，该软质材料的硬度小于形成骨架1的硬质材料的硬度。密封部2可以通过硫化等方 式附着于骨架1。密封部2沿着骨架1的周向在整周上延伸。密封部2包括第一主唇部21、第二主唇部22、第一支撑唇部23、第二支撑唇部24和卡接部25。
具体地，第一主唇部21从骨架1的径向外侧面朝向径向外侧延伸的同时朝向轴向一侧延伸，第二主唇部22从骨架1的径向内侧面朝向径向内侧延伸的同时朝向轴向一侧延伸。由于第一主唇部21和第二主唇部22分别附着于骨架1的径向外侧面和径向内侧面，使得第一主唇部21和第二主唇部22被骨架1完全分隔开，第一主唇部21和第二主唇部22不会相互受到影响。
在活塞密封组件安装于离合器分离系统的油压腔的情况下，第一主唇部21的远离骨架1的自由端部用于与形成该油压腔的径向外侧面接触，第二主唇部22的远离骨架1的自由端用于与形成该油压腔的径向内侧面接触。在轴向A上，第一主唇部21的自由端部和第二主唇部22的自由端部均延伸超出骨架1的轴向一侧的端部一定的距离，第一主唇部21的自由端部和第二主唇部22的自由端部之间形成朝向轴向一侧开口的凹槽。该凹槽的在径向R上的尺寸从轴向另一侧朝向轴向一侧逐渐变大。这样，当离合器分离系统的油压腔内的压力从轴向一侧作用于具有上述结构的第一主唇部21和第二主唇部22的情况下，能够提高第一主唇部21与形成离合器分离系统的油压腔的径向外侧面的密封效果并且能够提高第二主唇部22与形成离合器分离系统的油压腔的径向内侧面的密封效果。
在本实施方式中，为了提高密封效果，在第一主唇部21的靠近其自由端部的部分处，第一主唇部21形成有从第一主唇部21的径向外侧面朝向径向外侧凸出的三个第一凸起部211。三个第一凸起部211在轴向A上彼此间隔开，在相邻的两个第一凸起部211之间均形成凹部。在活塞密封组件安装于离合器分离系统的油压腔的情况下，各第一凸起部211均与形成油压腔的径向外侧面接触，使得由相邻的第一凸起部211与上述径向外侧面之间形成腔室。这样，能够通过该多个凸起部211形成迷宫密封；另外，在上述腔室内能够 收纳液压油，通过收纳有液压油的腔室提高了活塞密封组件对油压腔的密封效果；而且，上述腔室的液压油还可以起到润滑作用来降低第一主唇部21与形成油压腔的径向外侧面之间的摩擦。
另外，在沿着径向R的截面中，第一凸起部211的轴向宽度从第一主唇部21的径向外侧面朝向径向外侧逐渐减小。这样，能够降低活塞密封组件在油压腔内滑动时第一凸起部211与形成油压腔的径向外侧面之间的摩擦。
进一步地，第一支撑唇部23从骨架1的径向外侧面朝向径向外侧延伸，第二支撑唇部24从骨架1的径向内侧面朝向径向内侧延伸。在本实施方式中，由于第一支撑唇部23与第一主唇部21形成为一体并附着于骨架1的径向外侧面，第二支撑唇部24与第二主唇部22形成为一体并附着于骨架1的径向内侧面。第一支撑唇部23延伸的长度和第二支撑唇部24延伸的长度应当保证在活塞密封组件安装于离合器分离系统的油压腔内的情况下第一支撑唇部23和第二支撑唇部24能够与形成该油压腔的壁面接触，从而防止活塞密封组件在油压腔内滑动的过程中产生歪斜，进而避免了活塞密封组件产生偏心磨耗。
在径向R上，第一主唇部21延伸到第一支撑唇部23的径向外侧，第二主唇部22延伸到第二主唇部24的径向内侧。这样，在离合器分离系统用活塞密封组件安装于离合器分离系统的油压腔内的状态下，第一主唇部21与形成油压腔的径向外侧面形成接触密封而第一支撑唇部23与该径向外侧面形成接触密封或间隙密封，第二主唇部22与形成油压腔的径向内侧面形成接触密封并且第二支撑唇部24与该径向内侧面形成接触密封或间隙密封；并且使得第一主唇部21被形成油压腔的径向外侧面压缩的变形量大于第一支撑唇部23的被该径向外侧面压缩的变形量，第二主唇部22被形成油压腔的径向内侧面压缩的变形量大于第二支撑唇部24的被该径向内侧面压缩的变形量。由此，确保第一主唇部21和第二主唇部22与形成油压腔的壁面之间的干涉量大于第一支撑唇部23和第二支撑唇部24与形成油压腔的壁面之间的干涉量，从而 在保证了第一主唇部21和第二主唇部22作为主要密封手段且第一支撑唇部23和第二支持唇部24作为辅助密封手段的同时减小第一支撑唇部23和第二支持唇部24与形成油压腔的壁面之间的摩擦。
另外，在沿着径向R的截面中，第一支撑唇部23的轴向宽度从第一支撑唇部23与第一主唇部21连接的根部朝向径向外侧逐渐减小，第二支撑唇部24的轴向宽度从第二支撑唇部24的与第二主唇部22连接的根部朝向径向内侧逐渐减小。这样，第一支撑唇部23和第二支撑唇部24防止了活塞密封组件在油压腔内滑动的过程中产生歪斜的同时不会与形成油压腔的壁面产生过大的摩擦力；另外第一支撑唇部23和第二支撑唇部24还能够用作防尘唇以防止来自油压腔外侧的灰尘或者颗粒物进入油压腔。
进一步地，卡接部25形成于骨架1的轴向另一侧的端部。卡接部25的在径向R上的尺寸从轴向一侧的端部朝向轴向另一侧逐渐增大，以形成大致燕尾形状。该卡接部25用于与离合器分离系统的活塞的卡接槽配合，从而保证活塞密封组件能够与活塞紧固在一起。
在轴向A上，第一支撑唇部23位于第一主唇部21和卡接部25之间的位置，第二支撑唇部24位于第二主唇部22和卡接部25之间的位置。进一步优选地，第一主唇部21的在轴向A上的位置与第二主唇部22的在轴向A上的位置相同，第一支撑唇部23在轴向A上的位置与第二支撑唇部24的在轴向A上的位置相同。另外，在本实施方式中，骨架1的在轴向A上的长度保证了使第一主唇部21和第一支撑唇部23与第二主唇部22和第二支撑唇部24完全分隔开，即第一主唇部21和第一支撑唇部23位于骨架1的径向外侧而第二主唇部22和第二支撑唇部24位于骨架1的径向内侧，但是本发明不限于此，骨架1还可以延伸到卡接部25使得密封部2基本上分成位于骨架1的径向外侧和径向内侧的两个独立的部分。
(第二实施方式)
如图2b所示，根据本发明的第二实施方式的离合器分离系统用活塞密封组件的基本结构与根据本发明的第一实施方式的离合器分离系统用活塞密封组件的基本结构大致相同，它们的不同之处在于：在本实施方式中，在第二主唇部22的靠近其自由端部的部分处，第二主唇部22形成有从第二主唇部22的径向内侧面朝向径向内侧凸出的三个第二凸起部221，并且三个第二凸起部221在轴向A上彼此间隔开，以在相邻的两个第二凸起部221之间均形成凹部，并且在沿着径向R的截面中，第二凸起部221的轴向宽度从第二主唇部22的径向内侧面朝向径向内侧逐渐减小。
具有上述具体结构的第二凸起部221的作用与在第一实施方式中说明的第一凸起部211的作用类似，在此处不进行详细说明了。与第一实施方式相比，根据第二实施方式的活塞密封组件将具有更好的润滑状态和密封性能，能够被使用在更恶劣的环境中。
(第三实施方式)
如图2c所示，根据本发明的第三实施方式的离合器分离系统用活塞密封组件的基本结构与根据本发明的第一实施方式的离合器分离系统用活塞密封组件的基本结构大致相同，它们的不同之处在于：为了简化结构，在本实施方式中只有第一支撑唇部23。实际上，在本实施方式中，也可以仅具有第二支撑唇部24。
以上详细地说明了根据本发明的离合器分离系统用活塞密封组件的详细结构。本发明还提供了一种离合器分离系统，该离合器分离系统采用具有以上具体结构的离合器分离系统用活塞密封组件，根据本发明的离合器分离系统的其它结构可以与背景技术中说明的离合器分离系统的其它结构相同。
根据本发明的离合器分离系统包括环状的油压腔，根据本发明的离合器分离系统用活塞密封组件通过卡接部25安装于活塞且以能够在油压腔内往复滑动的方式收纳于油压腔内。
在离合器分离系统用活塞密封组件在油压腔内滑动的过程中，密封部2的第一主唇部21始终与形成油压腔的径向外侧面接触以在第一主唇部21的第一凸起部211与径向外侧面之间形成腔室，并且密封部2的第二主唇部22始终与形成油压腔的径向内侧面接触以在第二主唇部22的第二凸起部221与径向内侧面之间形成腔室；第一支撑唇部23和第二支撑唇部24则保证了该活塞密封组件的轴向A与对中式副缸的轴向大致一致，从而防止该活塞密封组件在滑动过程中产生歪斜。
虽然上面内容对本发明的技术方案进行了详细地阐述，但是还需要说明的是：
1.第一凸起部211的数量和第二凸起部221的数量不限于上述具体实施方式中所说明的数量，而是只要满足在活塞密封组件安装于油压腔的情况下第一凸起部211和第二凸起部221能够与形成油压腔的壁面形成收纳液压油的腔室即可，可以设置任意数量的第一凸起部211和第二凸起部221。
2.虽然在以上的具体实施方式中没有明确说明，但是应当理解，各主唇部21和22、各支撑唇部23和24以及卡接部25优选地形成为一体。
3.与现有技术的活塞密封件103相比，根据本发明的离合器分离系统用活塞密封组件具有更小的摩擦和磨损、具有更长的使用寿命并且具有更好的密封性能。
本发明的保护范围不限于上述具体实施方式，而是只要满足权利要求的技术特征的组合就落入本发明的保护范围之内。

Claims (15)

  1. 一种离合器分离系统用活塞密封组件，其特征在于，所述活塞密封组件包括：
    骨架，所述骨架具有环形形状，并且所述骨架沿着其轴向延伸预定长度；以及
    密封部，所述密封部附着于所述骨架且沿着所述骨架的周向在整周上延伸，所述密封部包括第一主唇部和第二主唇部，所述第一主唇部从所述骨架的径向外侧面朝向径向外侧延伸，所述第二主唇部从所述骨架的径向内侧面朝向径向内侧延伸，使得所述第一主唇部和所述第二主唇部被所述骨架分隔开。
  2. 根据权利要求1所述的离合器分离系统用活塞密封组件，其特征在于，所述第一主唇部朝向径向外侧延伸的同时朝向轴向一侧延伸，所述第二主唇部朝向径向内侧延伸的同时朝向轴向一侧延伸。
  3. 根据权利要求1或2所述的离合器分离系统用活塞密封组件，其特征在于，所述密封部包括从所述骨架的径向外侧面朝向径向外侧延伸的第一支撑唇部和/或从所述骨架的径向内侧面朝向径向内侧延伸的第二支撑唇部。
  4. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，
    所述第一支撑唇部与所述第一主唇部形成为一体，所述第一支撑唇部从与所述第一主唇部连接的根部朝向径向外侧渐缩，并且/或者
    所述第二支撑唇部与所述第二主唇部形成为一体，所述第二支撑唇部从与所述第二主唇部连接的根部朝向径向内侧渐缩。
  5. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，在所述骨架的径向上，所述第一主唇部延伸到所述第一支撑唇部的径向外侧，并且/或者，所述第二主唇部延伸到所述第二支撑唇部的径向内侧。
  6. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，
    在所述第一主唇部的靠近其自由端部的部分处，所述第一主唇部形成有从所述第一主唇部的径向外侧面凸出的多个第一凸起部；并且/或者
    在所述第二主唇部的靠近其自由端部的部分处，所述第二主唇部形成有从所述第二主唇部的径向内侧面凸出的多个第二凸起部。
  7. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，
    所述多个第一凸起部在所述轴向上彼此间隔开，以在相邻的两个所述第一凸起部之间形成凹部，并且/或者
    所述多个第二凸起部在所述轴向上彼此间隔开，以在相邻的两个所述第二凸起部之间形成凹部。
  8. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，
    所述第一凸起部从所述第一主唇部的径向外侧面朝向径向外侧渐缩，并且/或者
    所述第二凸起部从所述第二主唇部的径向内侧面朝向径向内侧渐缩。
  9. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，
    所述密封部还包括卡接部，所述卡接部形成于所述骨架的轴向另一侧的端部，所述卡接部与所述第一主唇部和所述第二主唇部形成为一体。
  10. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，
    在所述骨架的轴向上，所述第一支撑唇部位于所述第一主唇部和所述卡接部之间，并且/或者，所述第二支撑唇部位于所述第二主唇部和所述卡接部 之间。
  11. 根据前述权利要求中任一项所述的离合器分离系统用活塞密封组件，其特征在于，所述骨架由硬质材料制成，所述密封部由具有弹性的软质材料制成，所述软质材料的硬度小于所述硬质材料的硬度。
  12. 一种离合器分离系统，其特征在于，所述离合器分离系统包括权利要求1至11中任一项所述的离合器分离系统用活塞密封组件。
  13. 根据权利要求12所述的离合器分离系统，其特征在于，所述离合器分离系统包括环状的油压腔，所述离合器分离系统用活塞密封组件安装于活塞且以能够在所述油压腔内往复滑动的方式收纳于所述油压腔，
    所述密封部的第一主唇部与形成所述油压腔的径向外侧面形成接触密封并且所述密封部的第一支撑唇部与该径向外侧面形成接触密封或间隙密封，并且/或者
    所述密封部的第二主唇部与形成所述油压腔的径向内侧面形成接触密封并且所述密封部的第二支撑唇部与该径向内侧面形成接触密封或间隙密封。
  14. 根据权利要求12或13所述的离合器分离系统，其特征在于，
    所述密封部的第一主唇部的压缩变形量大于所述密封部的第一支撑唇部的压缩变形量，并且/或者
    所述密封部的第二主唇部的压缩变形量大于所述密封部的第二支撑唇部的压缩变形量。
  15. 根据权利要求12至14中任一项所述的离合器分离系统，其特征在于，
    在所述离合器分离系统用活塞密封组件在所述油压腔内滑动的过程中，所述密封部的第一主唇部始终与形成所述油压腔的径向外侧面接触以在所述第一主唇部的第一凸起部与所述径向外侧面之间形成腔室，并且所述密封部的第二主唇部始终与形成所述油压腔的径向内侧面接触以在所述第一主 唇部的第二凸起部与所述径向内侧面之间形成腔室。
PCT/CN2017/100286 2017-09-01 2017-09-01 离合器分离系统用活塞密封组件及离合器分离系统 WO2019041325A1 (zh)

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