阅读说明：本技术 具有分离式的密封环支架的从动缸 (The slave cylinder of sealing ring support with separate type ) 是由 S·奥特曼 D·M·罗伊特 T·尼森 A·格罗斯 P·瓦格纳 于 2019-05-16 设计创作，主要内容包括：本发明涉及一种从动缸(1),用于操作机动车的离合器和/或制动器,所述从动缸具有壳体(2),其中,能轴向移动的活塞(3)在通过所述壳体(2)构成的压力室(4)中布置成使得所述活塞在其移位时引起操作,其中,密封元件(5)借助于密封环支架(6)固定在所述活塞(3)上,用于将所述压力室(4)相对于所述活塞(3)密封,其中,所述密封环支架(6)具有内密封环支架(7)和与所述内密封环支架分开地构造的外密封环支架(8),所述内密封环支架至少部分地布置在所述密封元件(5)的径向内部,所述外密封环支架布置在所述密封元件(5)的径向外部。(The present invention relates to a kind of slave cylinder (1), for operating the clutch and/or brake of motor vehicle, the slave cylinder has shell (2), wherein, the piston (3) that can be moved axially is arranged so that the piston causes to operate in its displacement in the pressure chamber (4) being made up of the shell (2), wherein, sealing element (5) is fixed on the piston (3) by means of sealing ring support (6), for the pressure chamber (4) to be sealed relative to the piston (3), wherein, the outer seal ring bracket (8) that sealing ring support (6) has inner seal ring bracket (7) and dividually constructs with the inner seal ring bracket, the inner seal ring bracket is at least partially disposed at the inner radial of the sealing element (5), the outer seal ring rack arrangement is in the sealing element (5) Radially outer.)

1. a kind of slave cylinder (1) of clutch and/or brake for operating motor vehicle, the slave cylinder has shell (2), In the shell, the piston (3) that can be moved axially is arranged so that in the pressure chamber (4) being made up of the shell (2) In piston displacement, the piston causes to operate, wherein for the pressure chamber (4) are close relative to the piston (3) The sealing element (5) of envelope is fixed on the piston (3) by means of sealing ring support (6), which is characterized in that the sealing ring branch The outer seal ring bracket (8) that frame (6) has inner seal ring bracket (7) and constructs independently of the inner seal ring bracket, it is described Inner seal ring rack arrangement is on the radially inner side (21) of the sealing element (5), and the outer seal ring rack arrangement is described On the radial outside (22) of sealing element (5).

2. slave cylinder (1) according to claim 1, which is characterized in that the piston (3) has whole sealing ring support Section (7,9), the whole sealing ring bracket section is by the sealing ring branch independently of the whole sealing ring bracket section Frame section (8) supplement is at being fixed on the sealing element (5) on the piston (3).

3. slave cylinder (1) according to claim 1 or 2, which is characterized in that the piston (3) is by polyphthalamide Manufacture.

4. slave cylinder (1) according to any one of claim 1 to 3, which is characterized in that the material institute of the piston (3) The thermal expansion coefficient having is in a lateral direction less than 5010^-6K^-1And/or in a longitudinal direction less than 2010^-6K^-1。

5. slave cylinder (1) according to any one of claim 1 to 4, which is characterized in that the shell (2) is by plastics system It makes.

6. slave cylinder (1) according to any one of claim 1 to 5, which is characterized in that the piston (3) and the shell Body (2) is made from the same material.

7. slave cylinder (1) according to any one of claim 1 to 6, which is characterized in that pass through the piston (3) and institute It states sealing element (5) and constitutes bayonet.

8. slave cylinder (1) according to any one of claim 1 to 7, which is characterized in that the piston (3) and described outer It seals ring support (8) and constitutes bayonet (12,14).

9. slave cylinder (1) according to any one of claim 1 to 8, which is characterized in that the piston (3) has axial Radially outside (16) of shoulder (17) outstanding, the outer seal ring bracket (8) stick on the shoulder.

10. slave cylinder (1) according to any one of claim 1 to 9, which is characterized in that the construction in the piston (3) There is the through-hole (20) extended in the axial direction, the outer seal ring bracket (8) is cooperated in the through-hole.

Technical field

The slave cylinder of the clutch and/or brake that the present invention relates to a kind of for operating motor vehicle, the slave cylinder tool There is shell, the piston that can be moved axially in the shell is arranged so that the piston in the pressure chamber being made up of the shell Its displacement when cause to operate, wherein for by pressure chamber relative to the piston seal sealing element by means of sealing ring branch Frame is fixed on piston.

Background technique

It is known from the state of the art a kind of slave cylinder.For example, still unpub 10 2,017 113 723A1 of DE discloses one Kind clutch slave cylinder, particularly for the hydraulic pressure separating system of the friction clutch of motor vehicle, wherein clutch slave cylinder has The annular pressure chamber for constituting cylinder, can guide at least partly limit annular pressure chamber in a manner of it can move axially within the tube , the piston for being configured as annular piston, for being applied to release bearing, wherein using sealing element by piston relative to pressure Power room sealing, wherein sealing element by means of seal ring support be fixed on piston, wherein piston have in its circumferential direction to A few recessed sky being oriented radially, to be fixed on this recessed aerial by being press-connected for sealing ring support.

Therefore, piston usually pass through sealing ring support connect with sealing element so that piston it is axially displaced when, seal Portion/sealing element/sealing element is with displacement.

It has been found, however, that in many current applications for separation system, clutch slave cylinder (CSC, Clutch Slave Cylinder) persistently become larger in its area and diametrically.For example, in the application of triple clutches, it is necessary to realize high Up to the diameter of 120mm.Thus thermal expansion and leaching in material is generated to rise the requirement improved in terms of (Quellungen).In general, from The shell of clutch slave cylinder is manufactured from aluminium.Small ring is used as so-called sealing ring support, the ring is placed under sealing Side, to be clamped the sealing and the axial seat of sealing is fixed on piston.However, this sealing ring support is difficult to make It makes, because big diameter must be realized in the case where small wall thickness and small axial expansion.Additionally, disadvantageously, it assembles When operation be difficult and control be also it is bothersome.Especially in big area, such as in double clutch or triple clutches In device, can occur pullling the very big power of the sealing on sealing.In particular, under a vacuum, it can seal The pulling force improved is found in portion.This can cause the necessity of the firm buckle shoulder in piston or for sealing ring support or For the investment possibility of sealing.

Summary of the invention

Therefore, the task of the present invention is avoid or at least reduce the prior art.In particular, it should provide it is a kind of from Clutch slave cylinder, the clutch slave cylinder can be manufactured cost-effectively, can simply assembled, can simply manufactured, and The vacuum capacity of sealing is improved in the clutch slave cylinder.

According to the present invention, task of the invention solves in the following manner in this kind of device: sealing ring support has interior Ring support and the outer seal ring bracket independently of the inner seal ring framework construction are sealed, the inner seal ring rack arrangement is in institute It states on the radially inner side of sealing element, the outer seal ring rack arrangement is on the radial outside of the sealing element.Therefore, this Mean that inner seal ring bracket is at least partially disposed at the inner radial of sealing element, especially the inner seal ring bracket is under The inner radial that sealing element is arranged in axial region is stated, which is not only disposed with the inner seal ring bracket but also cloth It is equipped with sealing element.This also means that outer seal ring bracket is at least partially disposed at the radially outer of sealing element, especially The outer seal ring bracket is arranged in the radially outer of sealing element in following axial regions, the not only cloth in the axial region It is equipped with the outer seal ring bracket and is disposed with sealing element.

This has the advantage that the construction of the two-piece type by sealing ring support, it can be ensured that two sealing ring supports are more The better assembling capacity of good manufacturability and sealing and two sealing ring supports.

It proposes in the dependent claims and illustrates advantageous embodiment in further detail below.

It is also advantageous that piston has whole sealing ring bracket section, especially inner seal ring bracket, the sealing ring Bracket section by independently of its sealing ring bracket section, especially outer seal ring bracket supplement at making sealing element for example logical Side pocket is crossed to be fixed on piston, the side pocket by piston side sealing ring bracket section and independent sealing ring bracket section Composition.In other words, inner seal ring bracket with piston integrally, namely material integrally/construct to same material.Also It is to say, (piston side) sealing ring bracket section constitutes inner seal ring bracket.Thus the quantity of required component is desirably reduced, This plays the quantity of installation step advantageous, and thus serves to assembly time and manufacturing cost advantageous.

It is also advantageous that piston manufactures or include at least polyphthalamide by polyphthalamide (PPA), gather Phthalic amide is also referred to as Grivory.By using the plastic structural material of partially crystallizable, provide to piston in heat Suitable characteristic in terms of expansion, stiffness and strength.Alternatively, it is also able to use polyamide material (PA material), however it is described poly- Amide material contains thermal expansion coefficient more significantly lower than PPA material.This has the advantage of especially between inner radius appearance Gap is significantly less critical for the gap of sealing element squeezes out (Spaltextrusion), because PPA material is with relatively small Thermal expansion coefficient.Thus, it is possible to advantageously additionally here, i.e. the inner radius of sealing save reinforcing portion (Armierung). However, it is noted that forced stripper mechanism, the flexible deformation namely when deviating from are impossible for PPA material 's.

In one preferred embodiment, thermal expansion coefficient possessed by the material of piston is less than in a lateral direction 50·10^-6K^-1And/or in a longitudinal direction less than 2010^-6K^-1.That is, piston includes to have relatively small thermal expansion The material of coefficient, thus the material is significantly less critical in terms of the extrusion of gap.

It is also advantageous that shell is manufactured by plastics or is included plastics.Especially piston can be thus particularly well at it The geometry of shell is matched in terms of the tolerance of inner radius.

It is particularly preferred that piston and the shell are made from the same material or comprising identical materials.Thus, it is possible to Manufacturing cost is reduced in the case where the gap of sealing remains unchanged in an advantageous manner.

Furthermore practical, bayonet is constructed by piston and sealing element.Therefore, sealing/sealing element energy It is enough simply secured on piston and can be also detached from again from the piston.It is described because sealing is manufactured by elastic material Sealing can be pushed open simply by constructing the side pocket on piston or on inner seal ring bracket.It is particularly preferred that close Element is sealed to demould to outside.Sealing element can optimally design in terms of its retentivity and be matched with application purpose as a result,.

It is also advantageous that piston and outer seal ring stent applications constitute bayonet, especially snap hook interconnecting piece. Outer seal ring bracket can be by hooking (Einhaken) easily and can be fixed on piston with being detached from as a result,.For this purpose, outer close Seal ring bracket must be manufactured by the material of energy flexible deformation, and outer seal ring bracket is assemblied on piston.

In a preferred embodiment, snap hook construction on outer seal ring bracket, the snap hook preferably radially to It is interiorly prominent.So that snap hook can be designed so that the bayonet hooks are clamped preferably radially outward in the axial direction Protrusion outstanding, construction is on piston.Therefore realized between outer seal ring bracket and piston shape it is sealed, can letter Singly isolated interconnecting piece.

It is also advantageous that piston has in the axial direction preferably towards the direction of sealing element shoulder outstanding, external seal The radially outside of ring support sticks on the shoulder.Thus, it is possible to cause the supporting role to outer seal ring bracket, and therefore Additionally support sealing element.

Another advantageous expansion scheme is characterized in that, the through-hole extended in the axial direction is configured in piston, Outer seal ring support assorted is into the through-hole.Thus, it is possible to additionally support the outer seal ring bracket.Therefore, after piston Penetrating part is introduced in portion, namely radial external region, which preferably not exclusively rotatably constructs, that is, It discontinuously constructs, but is locally configured in circumferential direction.It can be said that construct teeth portion, outer seal ring support assorted was to should In teeth portion.

Preferably, outer seal ring framework construction is at the exterior geometry for making it intercept buckle geometry now And reinforcing portion geometry is also considered in its geometry.Here, buckle geometry can be ideally selected to consider The expansion occurred into the retentivity and sealing of sealing.Buckle geometry on outer seal ring bracket (especially blocks Clasp) it can be configured to rotatably be closed completely herein, or actual snap hook is discretely configured in order to reduce assembly force.

In addition, in an advantageous manner, piston can be realized or be passed through to this ring on the circular small shoulder on piston In teeth portion realize.Especially to be chosen to will not for rigidity of the outer seal ring bracket between the portion that reclines on shoulder and shell There is engagement and squeeze out (Schaltextrusion), occurs in the contact neither between piston and sealing ring support, also not close Occur in contact between seal ring bracket and shell.

It is also preferred that piston and sealing ring support are assembled together, then sealing element is pressed into.

In other words, the present invention relates to a kind of slave cylinders, wherein piston is manufactured by PPA, wherein inner seal ring bracket energy Enough it is integrated into the geometry of piston or can be configured to the component independently of the piston.Here, outer seal ring bracket by It is connected to penetrating part or through hole on piston in buckle geometry, the buckle geometry is more particularly to circlewise or local Ground construction.Here, outer seal ring bracket supports sealing element from radial outside.Therefore, piston and the common structure of outer seal ring bracket At the joint geometries for being used for sealing element (especially groove sealing ring).Therefore, piston is constructed in two style and is at least held The function of carrying on a shoulder pole the function of a sealing ring support, especially undertake two sealing ring supports.

Detailed description of the invention

The present invention is illustrated by attached drawing below.It illustrates:

Longitudinal cut-away view of slave cylinder according to the present invention in Fig. 1 first embodiment, the slave cylinder have outer seal ring Bracket and inner seal ring bracket,

The enlarged drawing of the local I I of Fig. 2 Fig. 1,

The enlarged drawing of the part of longitudinal cut-away view of slave cylinder in Fig. 3 second embodiment, the slave cylinder have outer close Seal ring bracket and the inner seal ring bracket integrally constructed with piston, and

The part of the amplification of longitudinal cut-away view of slave cylinder in Fig. 4 3rd embodiment, the slave cylinder have outer seal ring Bracket and inner seal ring bracket.

Attached drawing is only illustrative property and is only used for understanding the present invention.Identical element is by identical appended drawing reference table Show.The feature of different embodiments can exchange each other.

Specific embodiment

It is shown in Fig. 1 according to the present invention for operating the slave cylinder 1 of the clutch and/or brake of motor vehicle.From Dynamic cylinder 1 has shell 2, and piston 3 can be arranged axially displaceably in the shell.Piston 3 is in the pressure chamber 4 being made up of shell 2 In be arranged so as to cause the operation of clutch and/or brake when the piston axially shifts.For pressure chamber 4 is opposite It is mounted on piston 3 in the sealing element 5 that piston 3 seals by means of sealing ring support 6.

Sealing ring support 6 has inner seal ring bracket 7, which is at least partially disposed at sealing element 5 Inner radial.Sealing ring support 6 also has the outer seal ring bracket 8 constructed independently of 7 ground of inner seal ring bracket, the external seal Ring support is arranged in the radially outer of sealing element 5.Therefore, inner seal ring bracket 7 constitutes a section of sealing ring support 6, And outer seal ring bracket 8 constitutes another section of sealing ring support 6.Inner seal ring bracket 7 and outer seal ring bracket 8 are common Undertake the function of sealing ring support 6.

Fig. 2 shows the enlarged drawings of the local I I in Fig. 1.Sealing ring of the inner seal ring bracket 7 by construction on piston 3 Bracket section 9 and supplement.Therefore, inner seal ring bracket 7, outer seal ring bracket 8 and sealing ring bracket section 9 realize sealing jointly The function of ring support 6.Construct sealing ring bracket section 9 on piston 3 radially around the radially outwardly protrusion of arch 10, So that the arch is clamped by sealing element 5 in the axial direction in the assembled condition.Outer seal ring bracket 8 radially around arch The radially inwardly protrusion of shape 11, is clamped by sealing element 5 in the axial direction in the assembled condition so that this arches upward.

Piston 3 has the flange/female flange 12 projected radially outwardly, which is connected in the axial direction to abutment face On 13, sealing element 5 is sticked at the abutment face on piston 3.Flange 12 can continuously radially around ground or discontinuously Construction.Flange 12 is clamped by one or more snap hooks 14 in the axial direction, and the snap hook is radially inwardly from external seal Ring support 8 is prominent and can flexible deformation.Outer seal ring bracket 8 have be configured to blind hole, extend in the axial direction it is recessed Sky 15, for improving the elasticity of snap hook 14.Recessed empty 15 extend from the end face axial, towards piston of outer seal ring bracket 8 Into the material of outer seal ring bracket 8.

Radially outside the 16 of outer seal ring bracket 8 recline in the region of the end face towards piston of outer seal ring bracket 8 On the shoulder 17 of piston 3.Shoulder 17 is prominent towards the direction of sealing element 5 from piston 3 in the axial direction.Shoulder 17 can connect It is continuous circumferentially or discontinuously circumferentially to construct.

In the axial movement of piston 3, release bearing/engagement bearing 18 is moved, for operate in the axial direction from Clutch or brake.

Fig. 3 shows second embodiment, wherein inner seal ring bracket 7 and piston integrally/material integrally structure It makes.Therefore, the sealing ring rack area of the inner seal ring bracket 7 and piston monoblock type of outer seal ring bracket 8 and piston monoblock type Section 9 realizes the function of sealing ring support 6.Sealing ring bracket section 9 has the arch 10 projected radially outwardly.Radially-inwardly protrude Arch 11 construct on outer seal ring bracket 8.

As in first embodiment, piston 3 has the flange 12 of radially outward protrusion, and the flange is in the axial direction It is adjacent in abutment face 13, sealing element 5 is sticked at the abutment face on piston 3.Flange 12 is in the axial direction by outer close The snap hook 14 of seal ring bracket 8 is clamped.Radially outside the 16 of outer seal ring bracket 8 are in outer seal ring bracket 8 towards piston It is sticked in the region of end face on the shoulder 17 of piston 3.The axial section 19 of outer seal ring bracket 8 is cooperated in the axial direction It is configured in piston 3 in the penetrating part 20 of through-hole.The penetrating part 20 extends in the axial direction and discontinuous circumferentially structure It makes.The outside of axial section 19 constitutes radially outside 16, this is radially outside to stick on shoulder 17.

Fig. 4 shows third embodiment, wherein as in first embodiment, inner seal ring bracket 7 independently of 9 ground of sealing ring bracket section constructs on piston 3.In the third embodiment, piston 3 has such as that in second embodiment The penetrating part 20 of sample, axial section 19 are cooperated in the penetrating part.Therefore, axial section 19 sticks on piston with radially outside 16 On 3 shoulder 17.

Therefore, the external seal that sealing ring support 6 has inner seal ring bracket 7 and constructs independently of the inner seal ring bracket Ring support 8, on the radially inner side 20 of sealing element 5, which is sealing the inner seal ring rack arrangement On the radial outside 22 of element 5.

Reference signs list

1 slave cylinder

2 shells

3 pistons

4 pressure chambers

5 sealing elements

6 sealing ring supports

7 inner seal ring brackets

8 outer seal ring brackets

9 sealing ring bracket sections

10 arch upward

11 arch upward

12 flanges

13 abutment faces

14 snap hooks

15 recessed skies

16 is radially outside

17 shoulders

18 release bearings

19 axial sections

20 penetrating parts

21 radially inner sides

22 radial outsides.