CN104121183B - Piston pump valve for hydraulic vehicle brake system - Google Patents

Abstract

The present invention relates to a kind of piston pump valve (70) for hydraulic vehicle brake system, described piston pump valve has the closure body (72) for selectively opening and closing valve opening (50), and the fluid carried by described piston pump (10) can flow to described closure body on the side that becomes a mandarin (96) and the utilization of described closure body is opened motion (98) and allowed described fluid to flow through described valve opening (50).In described piston pump valve, described closure body (72) is designed to hollow and can be resiliently deformed there described opening in motion (98) in its side that becomes a mandarin (96).

Description

Piston pump valve for hydraulic vehicle brake system

Technical field

The present invention relates to a kind of piston pump valve for hydraulic vehicle brake system, this piston pump Valve has the closure body for selectively opening and closing valve opening, is carried by piston pump Fluid can be opened motion at the effluent that becomes a mandarin to this closure body and the utilization of this closure body and allow stream Body flows through this valve opening.Moreover, it relates to this piston pump valve is at hydraulic vehicle brake Application in system.

Background technology

In particular such as used at the motor vehicles with ABS and ESP brakes that Sample, hydraulic vehicle brake system has piston pump, and it is corresponding that this piston pump has at least one Piston pump valve.Single piston pump valve is used as inlet valve or is used as dump valve and helps In providing regulated brake pressure in brakes.To this end, piston pump valve includes generally Being formed the closure body of spheroid, this closure body is opened or closure piston pump as required Valve opening.This valve opening is usually located at the side of cup-shaped cylinder body in the case of dump valve, and piston can Axially movably it is bearing in this cylinder body.This piston on its end by eccentric wheel driving Move and put in cup-shaped cylinder body with its another end.This piston pump is the most by DE 10 2,009 046 313 A1 disclose.

Summary of the invention

According to the present invention, it is provided that a kind of piston pump valve for hydraulic vehicle brake system, should Piston pump valve has the closure body for selectively opening and closing valve opening, passes through piston pump The fluid of conveying can open motion at the effluent that becomes a mandarin to this closure body and the utilization of this closure body Fluid is allowed to flow through valve opening.Here, closure body be designed in its side that becomes a mandarin hollow also And can be resiliently deformed there along with opening to move in other words in opening motion.Change sentence Talking about, particularly in terms of longitudinal section, closure body is designed to have the recessed side that becomes a mandarin, and this enters The depression of stream side expands when valve is opened.Valve opening expands especially by the concave shape of closure body Open greatly.

The hollow the most recessed side that becomes a mandarin of the closure body according to the present invention refers to, become a mandarin edge, side The flow direction fluid is hollowed out.If it is to say, fluid is along longitudinal flow, that The side that becomes a mandarin is hollowed out along this longitudinal direction equally, particularly overarches.The most special It is the axial of corresponding cylinder body." recessed " herein refers to, and overarches in becoming a mandarin laterally, wherein, " interior " relates to the inner space pressure chamber in other words of piston pump.On the contrary, " outward " is alive The space outerpace extended behind in inner space along flow direction of plug pump.

Through so design, according to the closure body of the present invention, particularly there is in terms of longitudinal section centre Region, this zone line is limited by a side respectively in both sides.Each side as the crow flies or Person starts to prolong against the flow direction of fluid from zone line through rounding ground with overarching in other words Stretch.Zone line itself is the most at least somewhat arch.It is particularly preferred that mesozone Territory is designed to flat.

So work as stream according to the hollow the most recessed side that becomes a mandarin of the closure body of present invention design It is deformed into recessed less shape from its original-shape when body becomes a mandarin under stress and becomes a mandarin Fluid thus turn off body deformability, particularly expand.In deformation, when particularly expanding, Closure body opens valve opening, thus performs to open motion.Expansion can recessed less from end face Shape through flat shape until to convex shape.Therefore, it can to set and suit the requirements Flow cross section and the through-flow volume of time per unit.Flow cross section is to be applied to by fluid Pressure on closure body and the difference between the pressure existed after closure body along flow direction The function of pressure (and time change).By means of the flowing that can be set with suiting the requirements Cross section, is at least largely avoided interference noise and vibration.So, root is utilized According to the solution of the present invention, the piston pump of a kind of low noise and vibration particularly can be provided Valve.

Deformation, particularly expands and flexibly carries out according to the present invention.Deformation is stored when deformation Can, this deformation energy turns off body weight when fluid pressure reduces and newly moves back into its original-shape. Therefore, closure body automatically acts the bounced-back-role and therefore except closure body in other words that resets The function of reset element is the most also performed outside function.So, compared with conventional piston pump valve, In the way of saving material and space, reduce required number of components.

Additionally, according to the recessed side that becomes a mandarin of the present invention advantageously by means of the most flat, The particularly closure body of dish type provides, and this closure body needs more obvious than conventional closure body vertically Less structure space.Preferably, closure body according to the present invention in a space-saving manner by It is designed to disc spring.

Make additionally, closure body plays sealing in its side that becomes a mandarin with end face advantageously, according to the present invention With, wherein, this end face abuts on supporting member so that valve opening is sealed.Supporting member Preferably surround the valve base part of valve opening.It is particularly preferred that this valve base part have projection, Particularly step seamed edge in other words, this end face abut in hermetically as contra this projection, Particularly on step seamed edge in other words.Therefore, particularly in the way of saving space and material Achieve sealing function.

Additionally, closure body is preferably designed to annular disk according to the present invention, wherein, particularly Annular disk can be made in opening motion along the flow direction deformation of the fluid flowing through valve opening. Annular disk is designed to circularly to have medium pore opening in other words and disk-shaped has Planar elements.This planar elements has two end faces, and wherein, an end face is positioned at the side that becomes a mandarin On.Additionally, this planar elements includes the inward flange face being positioned on the inward flange surrounding medium pore Be positioned at and the edge surface on the outward flange of inward flange diametrically contraposition.

It is surprising that this hole in closure body is particularly advantageous just.Central authorities Hole is used as alignment features, and closure body can be positioned accurately at according to this position simply whereby In the piston pump valve of invention.Meanwhile, the inward flange of medium pore is preferably able to be arranged on and sets for this On the reaction member of meter so that this reaction member blocks central authorities along the flow direction of fluid Hole.Therefore, combining with planar elements, valve opening is closed generally.The planar of annular disk Element deforms when fluid becomes a mandarin under stress according to the present invention and opens valve in the case Hole.Additionally, deformation also includes the inclination of annular disk at this.Preferably, according to the present invention's Annular disk is conical shell, this conical shell in the region of its exterior rim along the stream of fluid Dynamic Direction distortion.Therefore, disk spring can serve as annular disk.

Additionally, annular disk has the inward flange being previously mentioned advantageously, according to the present invention and keeps In holding element, annular disk inward flange with it in this holding element seals.Should Holding element is preferably already mentioned reaction member and particularly valve gap parts.In order to Inward flange seals, annular disk particularly by form fit connection in the way of vertically It is arranged in holding element.It is particularly preferred that can be flexibly on annular disk edge within it Deformation, the most radially expands.Therefore, annular disk can be the simplest on edge within it Single and do not affect into this locality and be clipped in holding element.Alternatively, annular disk can within it limit Hold back close on edge with holding element.Close by means of holding back, in another manufacturing step, provide one Compared with connecting with clamping, stability is more preferably and the connection of better tightness.

Additionally, closure body have advantageously, according to the present invention can free-moving end region Territory.Here, closure body has lateral extensions for the main flow direction of fluid And about this lateral extensions, there is radially inner side region and radial outside region.Footpath is inside Side region and radial outside region are referred to herein as end regions.According to the present invention, end Region, portion is free-moving can to have free end in other words.Therefore, closure body is permissible The fluid become a mandarin on end regions pointedly extrudes backward and deforms, and particularly expands, Valve opening is opened on end regions whereby.In the case of annular disk is as closure body, should End regions is preferably placed in the radially inner side region of closure body, thus fluid can be in central authorities Longitudinal extension direction along piston pump valve is flowed out from piston pump.It is particularly preferred that according to this Invention can be positioned in the radial outside region of closure body by free-moving end regions.Closing In the radial outside region of body, compared with radially inner side region, fluid only need to use less Deformation force.Therefore, opening motion the most can be fast when the pressure of fluid raises relatively small Perform fastly.

Additionally, closure body has the outward flange being previously mentioned, closure body advantageously, according to the present invention Seal with this outward flange.To this end, the outward flange of closure body abuts in hermetically relatively Side, particularly on valve base part.This contra particularly has the surface as sealing surface. Therefore, valve opening is extremely simple and is sealed with saving parts.

Additionally, closure body preferably axially has constant thickness according to the present invention.Therefore, Providing a kind of closure body, this closure body applies especially for the fluid become a mandarin about its thickness Uniform back-pressure.The change of back-pressure is only by the lateral extensions of the closure body according to the present invention Design produces, thus the back-pressure of closure body can be only by changing being somebody's turn to do as variable factor Lateral extensions is set.So, the rebound effect suited the requirements after a deformation can With by the most only changing this because usually realizing.

Additionally, be advantageously provided with beating for closure body in the piston pump valve according to the present invention Open the travel limiting element of motion.Here, the trip restriction element is preferably located at dorsad Become a mandarin on the side of side.There, travel limiting element is preferably mounted directly at closure body Become a mandarin on the dorsal part of side dorsad and/or be arranged on the parts opposed with the dorsal part of closure body.Should Parts particularly valve gap parts.Travel limiting element is prominent there, thus closure body Fluid inflow and consequent open motion time hit on travel limiting element.Therefore, Avoid closure body and continue deformation, particularly expand, thus limit in a particularly simple way The maximum offset of closure body.By means of to opening the restriction of motion, flow cross section energy Enough it is set according to the application of piston pump.

Additionally, according to the present invention, advantageously provide one and there are valve base part and valve gap parts Piston pump valve, wherein, closure body is arranged between valve base part and valve gap parts.Additionally, Being provided with housing parts, in this housing parts, valve gap component fluidic is sealed shut and is positioned at it In hole, preferably shoulder hole.Valve gap parts limit the discharging area of piston pump valve also jointly And additionally valve base part is expressed in this hole.Valve base part therefore position keeps regularly In this hole and have surround valve opening valve seat.It is to say, valve base part and valve gap portion Part the most one after the other assembles, and valve gap component locations keeps valve base part regularly. Closure body according to the present invention is opening position in terms of motion and accurately and can transport according to the present invention It is maintained between valve gap parts and valve base part dynamicly.Described device can be carried out simply Assembling.Furthermore, it is possible to be particularly easy to utilize the piston pump valve according to the present invention to existing Piston pump installs additional.Here, during closure body can be pre-assembled in these parts On, particularly it is pre-assembled on valve gap parts, and subsequently need not be additionally in final assembling Assembling.

Preferably, closure body abuts in the most hermetically on valve base part and/or abuts in On valve gap parts and particularly preferably pretension.

Additionally, valve base part preferably include towards valve gap parts and around valve opening extend projection Region, closure body abuts on this elevated regions with its end face seal in the side that becomes a mandarin.With Time, this elevated regions is used as the bearing of closure body.Preferably, this elevated regions is from cross section See it is that step seamed edge in other words and being formed already mentioned becomes a mandarin side for being positioned at closure body The supporting member of end face.

Additionally, valve gap parts advantageously have the Internal periphery with recess, closure body is with its end Region, portion, particularly set with its radially inner side region in the case of annular disk is as closure body Put in this recess.Utilize the recess extended diametrically around longitudinal extension direction, at this The middle section being centrally formed valve gap parts of recess, in this middle section closed ring dish Central aperture.

Additionally, the Internal periphery of valve gap parts is advantageously formed to have step, this step is used Act on the travel limiting element opening motion of closure body.

The invention still further relates to the application in hydraulic vehicle brake system of this piston pump valve.Profit With the closure body designed according to the present invention, this piston pump valve needs the most vertically More significantly less structure space than known piston pump valve.Therefore, hydraulic vehicle brake system is also It is designed to less, thus reduces the structure space that motor vehicle braking system is required in vehicle.This Outward, hydraulic vehicle brake system utilizes the low noise according to the present invention and the piston pump valve of vibration There is the NVH characteristic of improvement.NVH refers to that " Noise (noise), Vibration (shake Dynamic), Harshness (sound vibration roughness) " and become making us not in corresponding vehicle Fast noise and the synonym of vibration, these undesirable noises and vibration can be by means of roots It is reduced according to the piston pump valve of the present invention.For this reason, the present invention additionally advantageously relates to And the application in the piston pump device that this piston pump valve is in being used in noise-sensitive region.

Accompanying drawing explanation

Below by way of the appended schematic figures reality to the solution according to the present invention Execute example to be described in detail.In the accompanying drawings:

Fig. 1 show for the motor vehicle braking system according to prior art with taking on service jobs mutually The longitudinal section of the piston pump of plug pump valve,

Fig. 2 shows the regarding such as Fig. 1 of the first embodiment of the piston pump valve according to the present invention The partial enlarged drawing of figure,

Fig. 3 shows the regarding such as Fig. 2 of the second embodiment of the piston pump valve according to the present invention The partial view of figure,

Fig. 4 shows the regarding such as Fig. 2 of the 3rd embodiment of the piston pump valve according to the present invention The partial view of figure,

Fig. 5 shows the regarding such as Fig. 2 of the 4th embodiment of the piston pump valve according to the present invention The partial view of figure.

Detailed description of the invention

Fig. 1 shows the piston pump 10 for hydraulic vehicle brake system.Piston pump 10 Including cup-shaped cylinder body 12, the casing wall 14 of this cylinder body extends along cylinder body axis 16.At casing wall The unlimited side of 14 is provided with low pressure sealing ring after being provided with filter cylinder 18 and being connected on this filter cylinder 20 and support ring 22.

In low pressure sealing ring 20, the piston rod 24 of piston is directed, belongs to going back of piston There is the valve base part 26 being connected vertically with piston rod 24.Three are formed in valve base part 26 Individual inlet hole 28, for guiding into brake fluid as known work from area of low pressure to radially inner side The valve seat 30 of the inlet valve 32 of plug pump valve.Belong to inlet valve 32 also has valve retainer 34 And it is supported on the spiral type back-moving spring 36 in this valve retainer and spherical closure body 38.Valve Retainer 34 is integrally formed with high pressure sealing ring 40, and this high pressure sealing ring is in casing wall 14 Carry out on side sealing and therefore limit in cylinder body 12 for fluid to be conveyed discharge chambe or Person says pressure chamber 42.

The circular cylinder bottom 44 of cylinder body 12 is provided with as another known piston pump valve in central authorities The frusto-conical valve seat 46 of dump valve 48, the circular valve opening 50 of this valve seat can use spherical pass Closure is closed.Closure body 52 is here compressed against valve by means of spiral type back-moving spring 54 On seat 46, this back-moving spring is supported on pump cover 56.Pump cover 56 is formed in pressure The passage discharged from cylinder chamber 42 by brake fluid under power is as outlet 58.Pressure initiation is by mean of The piston being made up of piston rod 24, valve base part 26 and high pressure sealing ring 40 realizes, wherein, Piston movement is resisted so that piston reset by means of the back-moving spring 60 being positioned in cylinder chamber 42.

Cylinder body 12 together with pump cover 56, filter cylinder 18 together with cylinder body and low pressure sealing ring 20 With in the housing bore 62 being designed to shoulder hole that support ring 22 is maintained at block pump case 64. Additionally, pump case 64 housing parts in other words is closed by pump cover 56 fluid-tight.Pump Lid 56 is held back close with pump case 64 for this in annular region 66.Pump case 56 is therefore to external seal The discharging area formed by the passage of outlet 58.This discharging area is by cylinder body 12 Sealing convex shoulder 68 between cylinder body 12 and housing bore 62 relative to being positioned at inlet hole 28 Inhalation area seal.

Fig. 2 to Fig. 5 shows the embodiment of the piston pump valve 70 according to the present invention, and this is lived Plug pump valve includes the closure body 72 between valve base part 74 and valve gap parts 76 vertically. Closure body 72 is used for selectively opening and closing valve opening 50 and using according to the present invention simultaneously Make reset element.Closure body 72 the most somewhat pretension is at valve base part 74 and valve gap parts 76 Between and there is constant thickness 77 vertically.

In such as the embodiment of Fig. 2, closure body 72 is annular disk 78, and this annular disk is set Count into the disk spring of the tapered housing shape with planar elements 79, including this planar elements Medium pore 82 is circularly surrounded at edge 80.The cylindrical part 84 of valve gap parts 76 Putting in this medium pore 82, this cylindrical part has the radially outer guarantor that form is step Holding element 86, annular disk 78 does not affects into this locality with inner edges 80 and is clipped in this holding element On.Therefore, this part 84 is by holding element 86 and inward flange 80 the most to a great extent Upper fluid is sealed shut medium pore 82 and inward flange 80 position is fixedly mounted in valve gap On parts 76.Additionally, be consequently formed by grasping that closure body 72 and valve gap parts 76 are constituted Making and the combiner of transport, this combiner can be the most prefabricated with time-consuming Assembling piston pump 10.

Additionally, annular disk 78 radially relatively has outward flange 88 with inward flange 80, This outward flange can be terminated at by free-moving end regions 90.Can free-moving end regions 90 piston pump valve 70 closed mode lower seal abut on valve base part 74 and because of This close valve orifice 50.To this end, in the embodiment such as Fig. 2 to 4, at valve base part 74 Being provided with supporting member 92, the end face 94 of closure body 72 is supported on this supporting member.Institute The supporting member 92 shown be designed to cincture the corner step in other words of seamed edge in other words and Bearing used herein as closure body 72 and the seal receptacle as end face 94.End face 94 is positioned at Closure body 72 become a mandarin on side 96, when piston rod 24 moves at this moment through valve opening 50 The fluid of extrusion flows to this and becomes a mandarin side and therefore this side that becomes a mandarin forms hydraulic action face.

By described closure body 72 as the disk spring that form is the conical shell bodily form The setting of annular disk 78, end face 94 become a mandarin be designed on side 96 hollow in other words by Be formed as recessed.Here recessed become a mandarin on side 96 with what end face 94 was formed at this, close Expand when closure 72 is according to present invention fluid inflow under being in pressure and the most flexibly become Shape so that supporting member 92 can be lifted away from by free-moving end regions 90.Therefore, produce Open motion 98, in this opens motion, fluid from pressure chamber 42 through hydraulic output or Saying that tap hole 100 flows out, this tap hole is that this is arranged on valve base part 74 in pump case 64 And between valve gap parts 76.If the pressure that the fluid matasomatism flowed out is on closure body 72 is also And particularly act on it and can reduce by the pressure on free-moving end regions 90, then should Closure body is resisted against supporting member owing to the deformation energy stored when elastic deformation pushes back again On 92.Therefore, valve opening 50 be again closed and closure body 72 according to the present invention with save The mode of parts is used simultaneously as reset element.Additionally, utilize the closure body 72 according to the present invention, Provide the most flat a kind of reset element, thus need very in the axial direction of piston pump 10 Few structure space.

At the end face 94 relative to the side 96 that becomes a mandarin of closure body 72 in dorsal part 102 dorsad It is provided with travel limiting element 104.Travel limiting element 104 on valve gap parts 76 with ring Around step seamed edge in other words form formed, closure body 72 is opening fortune with its dorsal part 102 Can hit on this step seamed edge in other words in dynamic 98.Therefore, closure body 72 deformation or Person says that expansion is limited to maximum offset.

Additionally, valve gap parts 76 have radially around recess 106, this recess is here It is designed to step, but hypotenuse can also be designed to.By means of recess 106, make valve gap The parts 76 centered assembling in pump case 64 becomes easy.

As the embodiment of Fig. 3 to Fig. 5 shows the various of the closure body 72 according to the present invention Modification.Work as described in these modification are as in the embodiment according to Fig. 2, but Being different, these modification the most do not have medium pore 82.

If the closure body 72 of Fig. 3 is the spherical crown 108 hollowed out along the main flow direction of fluid, This spherical crown has recessed end face 94 in the side 96 that becomes a mandarin.

Fig. 4 shows the closure body 72 that form is hollow truncated cone body, and this truncated cone has flat Middle section 110 and on this middle section the conical shell 112 of cincture.Conical shell 112 form two sides towards valve base part 74 in terms of cross section.Therefore, basis is formed The recessed side 96 that becomes a mandarin with its end face 94 of the present invention, this end face is at piston pump valve 70 Abut in as on the cincture hypotenuse of supporting member 92 closed mode lower seal.

Fig. 5 shows a kind of closure body 72, and this closure body includes with cincture thereon The central convex region 114 of conical shell 112, thus generally provide the recessed side that becomes a mandarin 96.Additionally, here, unlike the embodiment having been described above, outside closure body 72 Edge 88 abuts on valve base part 74 hermetically.

Claims (9)

1., for the piston pump valve (70) of hydraulic vehicle brake system, described piston pump valve has There is the closure body (72) for selectively opening and closing valve opening (50), pass through piston The fluid that pump (10) carries can flow to described closure body and described in the side that becomes a mandarin (96) Closure body utilization is opened motion (98) and is allowed described fluid to flow through described valve opening (50), institute State piston pump valve and also there are valve base part (74) and valve gap parts (76), it is characterised in that Described closure body (72) is hollow in its side that becomes a mandarin (96) and can open described Being resiliently deformed there in motion (98), wherein, described closure body (72) is arranged on Between described valve base part (74) and described valve gap parts (76).

2. piston pump valve as claimed in claim 1,

It is characterized in that, described closure body (72) in its side that becomes a mandarin (96) with end face (94) Seal.

3. piston pump valve as claimed in claim 1 or 2,

It is characterized in that, described closure body (72) is annular disk (78), wherein, it is possible to Described annular disk (78) is made to become along the flow direction of the fluid flowing through described valve opening (50) Shape.

4. piston pump valve as claimed in claim 3,

It is characterized in that, described annular disk (78) has inward flange (80) and is maintained at In holding element (86), described annular disk in described holding element with inner edges (80) Seal.

5. piston pump valve as claimed in claim 1 or 2,

It is characterized in that, described closure body (72) has can free-moving end regions (90)。

6. piston pump valve as claimed in claim 1 or 2,

It is characterized in that, described closure body (72) has outward flange (88), described closedown Body seals with described outward flange.

7. piston pump valve as claimed in claim 1 or 2,

It is characterized in that, described closure body (72) has constant thickness (77) vertically.

8. piston pump valve as claimed in claim 1 or 2,

It is characterized in that, be provided with and open motion (98) for described closure body (72) Travel limiting element (104).

9. the piston pump valve (70) as according to any one of claim 1 to 8 is at vehicle liquid Application in pressure brakes.