CN205978176U

CN205978176U - A differential valve for making low frequency vibration damping in clutch control system's hydraulic pressure pipe

Info

Publication number: CN205978176U
Application number: CN201620290330.3U
Authority: CN
Inventors: J·凯勒; B·图姆巴赫
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2015-04-09
Filing date: 2016-04-08
Publication date: 2017-02-22
Anticipated expiration: 2026-04-08
Also published as: DE102015206292A1

Abstract

The utility model relates to a differential valve, the filter that trembles especially, its damping that is arranged in clutch control system's hydraulic pressure pipeline under pressure's low frequency vibration, its characterized in that sets up between the wall of wall and the casing of axially movable's valve body in the casing one and streams the passageway, stream the passageway by being in the casing wall in the wall surface on the casing wall inboard and/or be in in the wall surface on the valve body wall outside one of the valve body wall or a plurality of grooves constitute. When when the valve body is in the intermediate position, it is connected and through partial chamber mobile be connected of slave cylinder side end with the slave cylinder side of casing inner chamber through the partial chamber of the initiative jar side of take the initiative jar side end and casing inner chamber is mobile to stream the passageway, the valve body is in lift up and have the interval for its backstop from the disk seat on the intermediate position. Avoided when the valve body links fast moving up to backstop or hard ground striking too from this backstop.

Description

For making the differential valve of the low-frequency vibration vibration damping in the hydraulic tube of clutch operating system

Technical field

The present invention relates to differential valve, it is used for making the low-frequency vibration in the hydraulic pressure pipeline of clutch operating system subtract Shake, described differential valve has：Housing, described housing has by the inner chamber of wall gauge；It is movably arranged in the interior of described housing Valve body in chamber, described valve body has by the inner chamber of a wall gauge and is fixed on the wall of described valve body, flexible film, The first opening in the wall be arranged in described valve body can be made to be opened according to pressure and/or close by the bending of described film, In the on-state, through described first opening, the inner chamber of described valve body is connected with the inner chamber flowing of described housing；Spring fills Put, described valve body is pressed to the direction of valve seat by described spring assembly, in described valve body closely against the situation on described valve seat Under, the inner chamber of described housing is divided into Part I chamber and Part II chamber by described valve seat, and described Part I chamber has composition The first opening in the wall of described housing, described first opening is used for making described housing be connected to force pipe on slave cylinder side On road, described Part II chamber is by being formed in the inner chamber of at least one of wall of described valve body second opening and described valve body Constantly flowing connects；With respect to the backstop of described housing fixed placement, described valve body can be against the power of described spring assembly Close towards described backstop motion；With the 3rd opening in the wall being formed in described valve body, by described 3rd opening, described valve body Inner chamber constantly flow with the Part III chamber of the inner chamber of described housing and be connected, wherein, described Part III chamber has composition Second opening of connection in the wall of described housing, being used for active cylinder side.

Background technology

Such differential valve is from WO 2012/000479.When vehicular clutch quickly couples, such as this situation can Occur when clutch pedal slips in the pin of driver, so that strong compression shock is delivered to through pressure pipeline by slave cylinder On valve body, thus valve body moves towards the direction of backstop and meeting hard hit is in backstop.Hard place is crossed due to valve body and hits in backstop, thin Film can the first opening from its escape, and valve body in the cooperation the wall of valve body therefore no longer can completely close, thus The function of differential valve is made to make the low-frequency vibration vibration damping in the hydraulic tube of clutch operating system to stop on clutch pedal Vibration impaired or destroyed in the most adverse case.Further, since valve body crosses hard place hitting in backstop, valve body And/or film and/or constitute backstop part can be impaired, thus the service life of differential valve can be shortened.

Content of the invention

The task of the present invention is, the differential valve so to construct beginning description is so that overcome at least in part by existing Problem known to technology and especially construct a kind of differential valve, wherein, when vehicular clutch quickly couples, it is to avoid valve body bumps against In backstop or at least avoid valve body to cross hard place to bump against in backstop.

For the differential valve of beginning description, the task of the present invention to solve by this way, i.e. exists in the wall of described valve body Outside valve body and the wall of described housing is provided with around circulation road, when described valve body is on a centre position between case inside When, the described Part III chamber flowing passing through active cylinder side end and the inner chamber of described housing around circulation road be connected and pass through from Dynamic cylinder side end is connected with the Part I chamber flowing of the inner chamber of described housing, and described valve body is on described centre position from valve seat Lift and with respect to described backstop, there is spacing simultaneously.

In the case of the differential valve according to the present invention, trigger strong pressure in the quick connection by vehicular clutch During impact, the volume flow to the active cylinder side end of valve body so improves so that valve body was braked simultaneously before bumping against in backstop And stop or at least consumingly buffer the shock in backstop for the valve body.Therefore, when valve body reaches in centre position, valve body court The motion in the direction of backstop can be over.Thus, the centre position of valve body can be the final position of valve body.This Bright advantage is, even if when vehicular clutch quickly couples, reliably stoping, film can from its cooperation escape, and/ Or, can occur damaging on film and/or on valve body and/or on backstop and/or on the miscellaneous part of differential valve, from And neither damage the function of the low-frequency vibration vibration damping in the hydraulic tube making clutch operating system of differential valve, do not damage differential pressure yet The service life of valve.

Preferably, in the centre position of valve body, the slave cylinder side end around circulation road also passes through valve with the inner chamber of valve body At least one of wall of body second open flow connects.Additionally, in the centre position of valve body, around the slave cylinder side of circulation road Can directly be flowed with the Part II chamber of the inner chamber of housing and be connected in end, described Part II chamber itself pass through the valve seat opened with The Part I chamber flowing of housing connects.

Preferably, the wall of valve body constructs multiple second openings, and, in the centre position of valve body, around circulation road Slave cylinder side end be connected by least one of multiple second openings the second open flow with the inner chamber of valve body.

Preferably, it is made up of one or more groove around circulation road, one or more of grooves are in housing wall at it Constitute on wall surface on inner side and/or constitute on the wall surface on the outside of valve body wall.

Preferably, film configuration is flexible pipe, described flexible pipe by the connection of the groove on the wall of protrusion and described valve body Lai Keep.

Described backstop can be fixed on housing wall on inside housing wall, single part one and constitute.Only have The described part of gear can be that the sleeve pipe with stepped channel is for example pressed into cone, and described passage has a ladder, and spring assembly props up Support is on described ladder.

Subject of the present invention is also a kind of clutch operating system, its have hydraulic pressure pipeline, clutch active cylinder, from Clutch slave cylinder and be arranged in the hydraulic pressure pipeline, differential valve according to the present invention.

In the claims the single feature enumerated can with arbitrary, technically significant mode be combined with each other and can Supplemented by details the fact that illustrate in specification and in accompanying drawing, wherein, illustrate the other enforcement modification of the present invention.

Brief description

The present invention and technical field will be explained in more detail below in reference to accompanying drawing.Accompanying drawing particularly illustrates and is preferable to carry out Example, but the present invention is not restricted to these embodiments.Particularly point out：Accompanying drawing and the dimension scale especially illustrating are only to illustrate Property.Identical reference represents identical object.Accompanying drawing illustrates：

Fig. 1 shows differential valve, the clutch behaviour for manipulating motor vehicle friction clutch having according to the present invention The schematic diagram of vertical system；

Fig. 2 is shown with vertical section and regards known differential valve as；With

Fig. 3 shows the vertical section of two examples of differential valve, wherein, diagrammatically show in Fig. 2 above center line The situation when quick connection for the situation of the differential valve illustrating, and diagrammatically show for according to the present invention's below center line The situation when quick connection for the situation of differential valve.

Specific embodiment

Fig. 1 illustrates the hydraulic clutch manipulation device 1 for motor vehicle as the example of clutch operating system.Hydraulic pressure from Clutch manipulation device 1 includes active cylinder 2, and described active cylinder is hydraulically connected with slave cylinder 4 by hydraulic pressure pipeline 3.Driven Cylinder 4 can for example be configured to the slave cylinder of lever cylindricality, as so-called central separator, wherein, in annular cylinder housing 5a The slave cylinder piston 5b of supporting annular.The slave cylinder piston 5b of the cylinder housing 5a of annular and annular surrounds annular pressure chamber 16 again. When manipulating slave cylinder piston 5b, disk spring 7 is manipulated in known manner by release bearing 6.Disk spring 7 is used for manipulating Vehicular clutch 17.Described vehicular clutch includes pressing plate 8, counter 9 and clutch disk 10.The such pretension of disk spring, makes Obtaining described disk spring makes pressing plate 8 be pressed onto in counter 9 along pretension direction and now makes and unshowned transmission input shaft The clutch disk 10 connecting without relative rotation clamps between pressing plate 8 and counter 9.For this reason, pressing plate 8 and counter 9 with The bent axle being shown without of this internal combustion engine being shown without connects without relative rotation.Thus, in the feelings of slave cylinder 4 pressure-loaded Under condition, disk spring 7 is so made to move by slave cylinder piston 5b and release bearing 6 so that disk spring and its pretension direction So that pressing plate 8 is reduced to the thrust in counter 9 direction on the contrary, and therefore disengage in clutch disk 10 and pressing plate 8 and back-pressure Friction lock between plate 9 connects.

Active cylinder 2 includes active cylinder piston 11a, described active cylinder piston by clutch pedal 12 by press rods 13 Manipulate.The housing 11b of active cylinder 2 and active cylinder piston 11a being movably arranged in this housing surround pressure chamber 15.Empty Carry container (Nachlaufbehaelter) 14 to be hydraulically connected with pressure chamber 15 in stress-free system, in described no pressure System in, active cylinder piston 11a its from housing 11b pull-out position be in farthest stretching, extension.

For hydraulic clutch manipulation device 1 as shown in Figure 1, vibrate the internal combustion engine never illustrating, especially from it Bent axle is delivered to slave cylinder 4 by the component of vehicular clutch 17.This vibration and then is including in the pressure chamber of slave cylinder 4 In the whole hydraulic system of pressure pipeline 3 and active cylinder 2 produce pressure vibration, described pressure vibration also noticeable for clutch Vibration on pedal 12.Pressure pipeline 3 is arranged and is used for weakening this pressure vibration (pressure according to the differential valve 18 of the present invention Pulse).Here, the differential valve 18 so-called in other words filter that trembles that is vibration filters, allow by described vibration filters and shake Dynamic, especially low-frequency vibration vibration damping in the case of not having additional travel loss, thus suppresses undesirable clutch pedal and shakes Dynamic.

Replace central separator as slave cylinder 4, it is possible to use other hydraulic pressure separating devices, such as half fluid power slave cylinder. Replace and active cylinder 2 is manipulated by clutch pedal 12, may also set up electrical actuator or such.Also may replace here such as to lead to The power loading crossing disk spring is opened clutch and is loaded by power to close clutch (active laminated type clutch).Active cylinder Configuration and the configuration of slave cylinder and the configuration of clutch also can be then arbitrary.

Therefore, the clutch operating device that illustrates and can be for double clutches accordingly based upon the differential valve of the present invention Applied in the clutch pack of speed changer.Additionally, differential valve can be applied in any hydraulic system, for example also can be Applied in brakes.

Fig. 2 shows and is regarded as known differential valve, and described differential valve replaces illustrating below with reference to Fig. 3, according to the present invention Differential valve 18 and be used in according in the hydraulic clutch manipulation device 1 of Fig. 1.This differential pressure working as the filter that trembles Valve includes substantially rotational symmetric housing 19, and described housing includes hydraulic pressure plug connector 20 on side, and described plug connector is used for Connect the hydraulic-pressure sleeve of differential valve and the pressure pipeline 3 according to Fig. 1.Plug connector 20 constitutes the slave cylinder side hydraulic pressure of differential valve even Connect.Band is provided with housing 19 side opposed with plug connector 20 for the sleeve assembly 21 of the sleeve 22 of socket connection. Sleeve 22 constitutes the active cylinder side hydraulic connecting of differential valve.

Valve module 29 is arranged in housing 19.Valve module 29 includes the displaceable valve body 30 of axial direction in housing 19, described Valve body is made up of synthetic material.Valve body 30 is arranged to respect to the anti-torsion of housing 19.On the side of active cylinder side, valve body 30 leads to The spring assembly crossing helical compression spring 26 form carrys out pretension, and wherein, spring 26 is supported on press-in cone 31, and described press-in cone exists Compress in housing 19 and constitute the backstop for valve body 30.On the slave cylinder side end of valve body, valve body 30 includes flexible Film 32.

Film 32 is disposed so as making the first opening 33 being arranged in valve body 30 can be according to pressure by the bending of film Power is opened and is closed in other words.Here, film 32 can so bend so that working as active cylinder in the case of active cylinder side overvoltage Pressure threshold on 2 sides when being overcome direction from described film to slave cylinder side bending press off simultaneously from opening 33 in other words Therefore opening 33 discharges.Now, fluid can flow to slave cylinder 4 from active cylinder 2.On the contrary, in the case of slave cylinder side overvoltage, thin Film 32 is forced on the wall of valve body 30 and seals opening 33 by this way.Film 32 has the work(of check-valves by this way Energy.Film 32 is configured to elastic hose, and described flexible pipe surrounds the wall pushing sleeve in other words of valve body on the slave cylinder side end of valve body To on this wall and here is fixed.

Fixation on the wall of valve body 30 for the film 32 can be passed through the sealed fixation of material, for example pass through bonding or welding, or Person as illustrated in figure 2 by shape sealed fixation, pass through to arrange one be arranged on the wall of valve body 30, surrounded by film 32 Protrusion 38, or by being realized with the combination of upper type.

Second opening 35 is set in valve body 30, described second opening make the side of slave cylinder side of the first opening 33 and its The side of active cylinder side connects.In position shown in Fig. 2 of valve body 30, the through-flow of the second opening 35 is suppressed by film 32, More specifically suppress as follows.Film 32 is forced into via the wall of the valve body 30 being in housing 19 by spring 26 On valve seat 34 on housing 19.

If pressure being set up on slave cylinder 4 side and this pressure overcoming the thrust to valve seat 34 for the valve body 30, that Valve body 30 lifts from valve seat 34 together with film 32 and fluid can be by the part chamber 39 being in housing 19 of housing cavity Flow to active cylinder 2 with the second opening 35 being in valve body 30.

When quick connection, valve body 30 moves until backstop, and described limiting structure is on press-in cone 31.

Fig. 3 show in the diagram above center line for during differential valve shown in Fig. 2 when quick connection Situation, and show in the diagram below center line and couple quick for during differential valve 18 constructed according to the invention When situation, wherein, in figure 3, those parts same or like with the corresponding component of the differential valve shown in Fig. 2 are with phase With reference representing.

As entirely illustrating above center line and in fig. 2 in figure 3, be regarded as known differential valve, exist in figure 3 Illustrating below center line, had according to the differential valve 18 of the present invention housing 19 and in inner chamber 24 axial movably valve body 30, Described housing has by the inner chamber 24 of wall 23 gauge, and described valve body has by the inner chamber 36 of wall 25 gauge of valve body and is fixed on valve On the wall 25 of body 30, flexible film 32, by the bending of described film, first being arranged in the wall 25 of valve body 30 opens Mouth 33 can be opened according to pressure and/or close.In the open mode of opening 33, through the first opening 33, valve body 30 Inner chamber 36 and housing 19 inner chamber 24 on the slave cylinder side of housing stream be dynamically connected.First opening 33 not only also exists in fig. 2 In Fig. 3, (above and below center line) is shown as closing.

Additionally, helical compression spring 26 shape is also such as had according to the differential valve of prior art according to the differential valve 18 of the present invention The spring assembly of formula, described spring assembly makes valve body 30 compress the valve seat 34 being formed on housing 19, and described valve seat is in valve body 30 Film 32 airtight recline in the case of the inner chamber 24 of housing 19 is divided into Part I chamber 37 and Part II chamber 39, wherein, The first opening 40 (see Fig. 2) being formed in the wall 23 of housing is associated with Part I chamber 37, and wherein, Part II chamber 39 Constantly flowed with the inner chamber 36 of valve body 30 by multiple, such as two the second openings 35,35 ' being formed in the wall 25 of valve body 30 It is dynamically connected.When differential valve according to prior art, it is provided only with second opening 35.Be regarded as known differential pressure Valve is different, has backstop, the active cylinder side towards differential valve of described backstop gauge valve body 30 according to the differential valve 18 of the present invention The motion in the direction connecting, described backstop is constituted by being pressed into cone 31.

Not only for the situation of the differential valve 18 according to the present invention, and during for being regarded as known differential valve, valve The inner chamber 36 of body 30 is by the part chamber 42 of the 3rd opening 41 in the wall of composition valve body 30 and the inner chamber 24 of housing 19 constantly Flowing connects.Not only for the situation of the differential valve 18 according to the present invention, and during for being regarded as known differential valve, It is provided with the second opening 43 in the wall 23 of housing 19, be connected on pressure pipeline 3 in active cylinder side for differential valve or do not having Have in the flexible program illustrating and be directly connected in active cylinder 2.

Different from being regarded as known differential valve, have around circulation road 44 according to the differential valve 18 of the present invention, described around circulation Road is made up of the groove that one or more extends along the axial direction of housing 19.The wall 25 being arranged on valve body 30 around circulation road 44 exists Outside circulation road and housing 19 wall 23 between the inner side of circulation road.Constitute at one or more grooves of circulation road 44 In the wall surface on housing wall 23 is inside it.Alternatively, one or more described grooves may also be arranged on valve body wall 25 In wall surface or both it was arranged in housing wall 23 and be also disposed in valve body wall 25.

When vehicular clutch quickly couples, this situation for example can be sliding from clutch pedal 12 in the pin of driver Strong compression shock occurs when de- be delivered on valve body 30 by pressure pipeline 3 by slave cylinder 4, thus, valve body 30 from Valve seat 34 lifts and move in the direction of the backstop on press-in cone 31 towards construction.Here, the first opening 33 is closed by film 32 Close and hydraulic fluid flows to Part II chamber 39 with passing through from Part I chamber 37 on valve seat 34 side, from Part II chamber 39 are flowed in the inner chamber 36 of valve body 30 by opening 35, are passed through Part III chamber 42 and are continued through housing by the inner chamber 36 of valve body 19 the second opening 43 flow to active cylinder 2.

Once valve body 30 move so remote towards the direction of described backstop so that around circulation road 44 slave cylinder side end not Covered by the wall 25 of valve body 30 again, then hydraulic fluid is also flowed in circulation road 44 and around circulation road by Part II chamber 39 It is flowed in the Part III chamber 42 of housing cavity 24 on 44 active cylinder side end.In addition, hydraulic fluid is also by the second opening 35 ' flow in circulation road 44.This attached through the active cylinder side end around circulation road 44 to valve body 30 by hydraulic fluid Plus the differential pressure to cut down rapidly on valve body 30 that flows, thus valve body no longer or does not at least bump against in backstop fiercely.

Fig. 3 shows the valve body 30 of the differential valve 18 according to the present invention in centre position below center line, described In centre position, as explained above, around circulation road on slave cylinder side end be not only open and also in active cylinder side Open in portion, and valve body 30 (going back) has the spacing to backstop and lifts from valve seat 34.According to the present invention, described in Between position can also be valve body 30 final position, in final position, valve body does not continue to move in backstop.

Reference

1 hydraulic clutch manipulation device

2 active cylinder

3 pressure pipelines

4 slave cylinders

5a cylinder housing

5b slave cylinder piston

6 release bearings

7 disk springs

8 pressing plates

9 counter

10 clutch disks

11a active cylinder piston

11b active cylinder housing

12 clutch pedals

13 press rods

14 unloaded containers

15 pressure chambers

16 pressure chambers

17 vehicular clutches

18 differential valves

19 housings

20 plug connectors

21 sleeve assemblies

22 sleeves

23 (housing) wall

24 (housing) inner chamber

25 (valve body) wall

26 springs

27 O-ring

28 grooves

29 valve modules

30 valve bodies

31 press-in cones

32 films

33 (valve body) first opening

34 valve seats

35 (valve body) second opening

35 ' (valve body) second opening

36 (valve body) inner chamber

37 Part I chambeies

38 protrusions

39 Part II chambeies

40 (housing) first opening

41 (valve body) the 3rd opening

42 Part III chambeies

43 (housing) second opening

44 around circulation road.

Claims

1. differential valve, it is used for the low-frequency vibration vibration damping in the hydraulic pressure pipeline (3) make clutch operating system (1), described Differential valve has：

Housing (19), described housing has by the inner chamber (24) of wall (23) gauge；

It is movably arranged in the valve body (30) in the inner chamber of described housing, described valve body has by the inner chamber of a wall (25) gauge (36) and be fixed on the wall (25) of described valve body (30), flexible film (32), the bending by described film can The first opening (33) in the wall (25) be arranged in described valve body (30) is made to be opened according to pressure and/or close, in the first opening In the state of opening, through described first opening, the inner chamber (36) of described valve body (30) is flowed with the inner chamber (24) of described housing Connect；

Spring assembly, described valve body (30) is pressed to the direction of valve seat (34) by described spring assembly, in described valve body (30) sealing Abut in described valve seat (34) upper in the case of, the inner chamber (24) of described housing (19) is divided into Part I chamber by described valve seat (37) and Part II chamber (39), described Part I chamber (37) has first in the wall (23) being formed in described housing (19) Opening (40), described first opening is used for making described housing (19) to be connected to pressure pipeline (3) on slave cylinder side, and described Two part chambeies (39) by be formed at least one of the wall (25) of described valve body (30) the second opening (35,35 ') with described The inner chamber (36) of valve body (30) constantly flows connection；

With respect to the backstop of described housing fixed placement, described valve body (30) can be stopped towards described against the power of described spring assembly Gear motion is close；

With the 3rd opening (41) in the wall (25) being formed in described valve body (30), by described 3rd opening, described valve body (30) inner chamber (36) is constantly flowed with the Part III chamber (42) of the inner chamber of described housing and is connected, wherein, described 3rd Point chamber (42) have in the wall (23) being formed in described housing (19), for active cylinder side connection the second opening (43)；

It is characterized in that, the wall (25) in described valve body (30) outside valve body and described housing (19) wall (23) in housing Be provided with around circulation road (44) between side, when described valve body (30) is in an intermediate position, described around circulation road pass through active cylinder Part III chamber (42) flowing of side end and the inner chamber (24) of described housing (19) be connected and by slave cylinder side end with Part I chamber (37) flowing connects, and described valve body (30) is lifted and simultaneously relative from valve seat (34) on described centre position In described backstop, there is spacing.

2. differential valve according to claim 1 is it is characterised in that in the described centre position of described valve body (30), institute State the wall (25) passing through described valve body (30) around the slave cylinder side end of circulation road (44) and the inner chamber (36) of described valve body (30) At least one of the second opening (35,35 ') flowing connect.

3. differential valve according to claim 1 or claim 2 is it is characterised in that in the described centre position of described valve body (30), institute State and be connected with Part II chamber (39) flowing of described housing (19) around the slave cylinder side end of circulation road (44), described second Point chamber itself passes through the valve seat (34) opened to flow with the Part I chamber (37) of described housing (19) to be connected.

4. differential valve according to claim 1 and 2 is it is characterised in that the middle composition of the wall (25) in described valve body (30) is many Individual second opening (35,35 '), and in the described centre position of described valve body (30), described driven around circulation road (44) Cylinder side end passes through at least one of the plurality of second opening (35,35 ') second with the inner chamber (36) of described valve body (30) Opening (35 ') flowing connects.

5. differential valve according to claim 1 and 2 it is characterised in that described around circulation road (44) by one or more Groove constitute, one or more of grooves be in described housing wall (23) inside housing wall on wall surface in and/or place In the wall surface on described valve body wall (25) is outside valve body wall.

6. differential valve according to claim 1 and 2 is it is characterised in that described film (32) is configured to flexible pipe, described flexible pipe Kept by the connection of the groove on protrusion (38) and the wall (25) of described valve body (30).

7. differential valve according to claim 1 and 2 it is characterised in that described limiting structure one in described housing wall (23) it is fixed on on the part inside described housing wall.

8. according to claim 7 differential valve it is characterised in that the described part with described backstop is with stepped channel Sleeve pipe, described passage has a ladder, and the end of described spring assembly is supported on described ladder.

9. clutch operating system, it has pressure pipeline (3), active cylinder (2), slave cylinder (4) and according to claim 1 to 8 One of, the differential valve (18) that is arranged in described pressure pipeline (3).