CN207145676U - Cavity space can compensate for the upper valve body of regulation and the pneumatic operated valve with the upper valve body - Google Patents

Abstract

The utility model discloses cavity space can compensate for the upper valve body of regulation and the pneumatic operated valve using this upper valve body, and upper valve body includes upper shell, valve element, upper valve chamber seal, upper Valve seal, upper valve spring, upper valve block piece are provided with housing；Valve core inside is provided with movable piston bush, and piston bush can make in upper valve core up and down deposits headroom so as to change inside upper shell；Pneumatic operated valve also includes lower valve body, and coupled piston, lower valve chamber seal, lower Valve seal, lower valve spring, lower valve plug are provided with lower valve body；Upper valve body and lower valve body are all connected to independent air feed pump, and lower valve body is also connected to brake chamber, by the teamwork of upper lower valve body, change the break-make of gas circuit, and then control the air-flow into brake chamber to realize automobile brake.The utility model uses new valve element, can reach the braking effect of more efficient stable.

Description

Cavity space can compensate for the upper valve body of regulation and the pneumatic operated valve with the upper valve body

Technical field

The utility model is related to braking automobile pneumatic operated valve field, and in particular to cavity space can compensate for regulation upper valve body and With the pneumatic operated valve of the upper valve body.

Background technology

Pneumatic operated valve is the primary control among running brakes, the braking of primary brake system in double loop Realize sensitive servo antrol during journey and release, brake valve mainly by epicoele piston, cavity of resorption piston, push rod, balancing spring, Return spring (upper and lower cavity), epicoele valve, cavity of resorption valve, air inlet, gas outlet, exhaust outlet, passage composition.When driver steps on During lower pedal, piston is pushed balancing spring by stretching pull bar, piston moves down, and first closes drain tap, open into Air valve, now the compressed air of gas receiver be filled with brake chamber through intake valve, promote air chamber diaphragm make brake cam rotate from And realize wheel braking.

The cavity space of existing pneumatic operated valve upper valve body is fixed non-adjustable, and the dynamics of trampling reaches most in brake process After big, then the air pressure in pneumatic valve chamber is not over peak value, does not compensate stopping power raising, therefore existing pneumatic operated valve Stopping power can not tackle more severe working environment, can not reach more excellent braking effect during in face of emergency case.

Utility model content

In order to solve the above technical problems, the utility model discloses upper valve body and the utilization that cavity space can compensate for regulation The pneumatic operated valve of the upper valve body, it is desirable to provide a kind of cavity space of upper valve body can suitably change, in braking to being carried in chamber For atmospheric pressure compensating, the pneumatic operated valve of raising skidding ability.

The technical solution adopted in the utility model is：

Cavity space can compensate for the upper valve body of regulation, including upper shell, the upper chamber and upper valve storage that upper shell is communicated with Air cavity, it is additionally provided with upper valve pneumatic cavity；Valve element is provided with upper chamber, upper valve air storing cavity is provided with upper valve chamber seal, positioned at upper valve The upper valve gasket on chamber seal top, the upper Valve seal being enclosed on chamber seal, it is placed in chamber seal and upper Valve seal Between upper valve spring, be placed in the upper valve block piece of upper valve its lower part, upper valve pneumatic cavity is located at the bottom of upper shell.

Upper valve gasket is ring-type, is coaxially disposed with upper Valve seal, and upper valve gasket is fixed on upper chamber and connected with upper valve air storing cavity Interface；And the intermediate throughholes of upper valve gasket allow to drive the lower end of piston to pass through.

Specifically, valve element is made up of piston bush and driving piston；Piston bush is connected with upper shell and piston bush and upper casing The first cavity is formed between body；It is stepped piston and including three sections of upper, middle and lower to drive piston, drives the epimere and upper casing of piston Internal wall contact or piston bush contact, stage casing are located in piston bush, and hypomere is between upper chamber and upper valve air storing cavity At connected entrance.Drive connection portion is additionally provided with the top of driving piston, drive connection portion is the connector of groove-like, and it is acted on Contacted in the drive link with outside, bear to trample the pressure that brake pedal transmission comes during braking and pass to driving piston, as The driving force that driving piston moves downward.

Further, piston bush is provided with back-moving spring and counterbalance spring, and back-moving spring one end is connected to piston bush, another End is connected to the epimere of driving piston；Counterbalance spring one end is connected to piston bush, and the other end is connected to spring mountings or benefit Repay regulating part.

Back-moving spring is connected with driving piston, and its role is to go up to provide restoring force for driving piston；Counterbalance spring with Spring mountings are connected, and piston bush is flexibly connected with epicoele chamber interior walls, and piston bush is upper in upper valve body air inlet and exhaust process Enter line slip in chamber, counterbalance spring provides restoring force for the reply of piston bush；Counterbalance spring is attached with compensation adjustment part, Piston bush is compensation adjustment part provided with single movable part, and in upper valve body air inlet and exhaust process, compensation adjustment part is in work Carry out up and down on plug sleeve, the size of headroom is deposited in the inside for adjusting upper chamber, and counterbalance spring is that compensation adjustment part is being replied Restoring force is provided during initial position.

Further, upper shell is provided with upper valve air inlet and upper valve air gate, and upper valve air inlet connects upper valve air storing cavity, on Valve air gate connects upper chamber and outside, and passage is provided between upper chamber and upper valve pneumatic cavity.The effect of passage be by The gas of upper chamber imports upper valve pneumatic cavity.

Further, described piston bush is cylindrical sleeve tubular or inverted T-shaped sleeve-shaped, piston bush and upper chamber's internal face It is slidably connected；

During from this piston bush, back-moving spring quantity is at least one, when back-moving spring quantity is for the moment, back-moving spring connects It is connected to the epimere of driving piston；When back-moving spring quantity is more than for the moment, back-moving spring is sequentially coaxially located on piston bush；Reset bullet Counterbalance spring is additionally provided with the outside of spring, counterbalance spring is connected to spring mountings；Described spring mountings are to be located at upper chamber Internal ring catch.The effect of ring catch is to provide stress point for counterbalance spring.

Scheme described above is not limited to, piston bush is double layer sleeve barrel, and the internal layer bottom of piston bush is connected with outer bottom, Groove is formed between internal layer and outer layer, the longitudinal cross-section of piston bush is " mountain " font, and piston bush is fixedly connected with upper chamber, specifically Connected mode can be step inlay card attachment structure and coordinate snap ring to fix, and can also be connected by screw bolts, buckle connects Connect.

During from this piston bush, the second cavity is formed with driving piston inside piston bush, is provided with and resets in the second cavity Spring, back-moving spring upper end is connected to driving piston epimere and lower end is connected to piston bush；Piston bush outer wall and upper enclosure inner wall Face forms upper end closed, the 3rd cavity of lower ending opening, is provided with compensation adjustment part in the 3rd cavity, the company of being additionally provided with the 3rd cavity Connect the counterbalance spring of compensation adjustment part and the 3rd cavity top end；Described compensation adjustment part is back-up ring, and back-up ring is located at the 3rd cavity It is interior, it can be slided during upper valve body air inlet and exhaust in the 3rd cavity, headroom, back-up ring are deposited in the inside for changing upper chamber It is in close contact with the internal face of the 3rd cavity, prevents gas leakage.

Scheme described above is not limited to, piston bush is double layer sleeve barrel, and the internal layer bottom of piston bush is connected with outer bottom, Groove is formed between internal layer and outer layer, the longitudinal cross-section of piston bush is " mountain " font, and piston bush is slidably connected with upper chamber, connection Face is sealed by sealing ring, prevents gas leakage.

During from this piston bush, the second cavity is formed with driving piston inside piston bush, is provided with and resets in the second cavity Spring, back-moving spring upper end is connected to driving piston epimere and lower end is connected to piston bush；The outer pars intramuralis of piston bush is provided with upper end Closing, the 4th wall of lower ending opening, the 4th wall is interior to be provided with compensation adjustment part, and connection compensation adjustment is additionally provided with the 4th cavity The counterbalance spring of part and the 4th cavity top end；Described compensation adjustment part is back-up ring, and back-up ring is located in the 4th cavity, in upper valve body It can be slided during air inlet and exhaust in the 4th cavity, headroom, back-up ring and the 4th cavity are deposited in the inside for changing upper chamber Internal face be in close contact, prevent gas leakage.

Further, the epimere side wall of described driving piston and stage casing side wall are provided with sealing ring, epimere side The sealing ring of wall is in close contact with upper chamber's internal face close contact or with piston bush internal face, the sealing of stage casing side wall Circle is in close contact with piston bush internal face.

Further, it is provided with sealing ring outside the piston bush of the valve element, sealing ring closely connects with upper chamber internal face Touch.

Set the meaning of sealing ring to be to prevent gas leakage, keep air-tightness inside pneumatic operated valve, so as to ensure that pneumatic operated valve works Validity and accuracy.

Further, driving piston block piece is provided with inside described upper chamber, or driving piston is provided with piston bush Block piece.The effect of driving piston block piece is to limit the extreme position that piston bush moves upwards, avoids driving piston to come off.

Further, described upper valve chamber seal is the sleeve with air gap washer, and air gap washer covering driving is lived Fill in the air gap between lower end and connected entrance.

Drive piston to carry out up and down, drive and be located at high limit position, its lower end and connected entrance under piston normality Flush or positioned at the edge of upper chamber one end of connected entrance, the now closed connected entrance of air gap washer, upper chamber and upper valve air storing cavity Between keep absolutely gas-tight；Piston is driven to move downward in skidding, driving piston promotes upper valve chamber seal, Air gap washer is opened on top, is connected between upper chamber and upper valve air storing cavity, and the gas of upper valve air storing cavity enters upper chamber by connected entrance, And upper valve pneumatic cavity is entered by passage.

Further, described upper valve spring is volute spring, one end of upper valve spring slot and upper valve chamber seal One end of contact and wide-mouth and upper valve washer contacts.Bigger decrement can be obtained using volute spring, there is provided more sufficient returns Multiple power, the production space of upper valve air storing cavity can be also reduced to a certain extent, there is product to improving the intensity of upper valve body, saving resource Pole meaning.

The effect of upper Valve seal is to keep lower valve spring axially compressed, avoids spring sideslip；While upper Valve seal The axial direction property that upper valve chamber seal can also be kept to move.

Further, described upper valve block piece, spring mountings, driving piston block piece are snap ring.Elasticity Snap ring is easily installed, using flexible, practical, and it is as the preferred scheme in the utility model, in the situation for meeting to require Under also replace with other workpiece.

With the pneumatic operated valve for the upper valve body being described above, including the lower valve body connected, upper valve body are matched with the upper valve body Complete pneumatic operated valve is formed with lower valve body.Generally upper valve body connects with the mode that lower valve body is connected by screw bolts.

Specifically, described lower valve body includes lower house, the lower valve pneumatic cavity and lower valve gas storage that lower house is communicated with Chamber；Coupled piston is provided with lower valve pneumatic cavity, the upper end of coupled piston is provided with the upper connector of connection upper valve chamber seal, connection The lower end of piston is provided with piston head, piston head be located at lower valve pneumatic cavity with the connected entrance of lower valve air storing cavity, coupled piston, on Connector, piston head insertion；Upper valve pneumatic cavity and lower valve pneumatic cavity complement each other to form closed pneumatic cavity.

Lower valve air storing cavity is provided with lower valve chamber seal, and seal closing lower valve pneumatic cavity and the company of lower valve air storing cavity Port, lower valve air storing cavity are additionally provided with the lower valve gasket positioned at lower valve chamber seal top, are enclosed on lower valve chamber seal Lower Valve seal, the lower valve spring being placed between lower valve chamber seal and lower Valve seal, the lower valve plug for being placed in lower valve its lower part, The lower valve block piece being connected with lower valve plug.

Lower valve gasket is ring-type, is coaxially disposed with lower Valve seal, and lower valve gasket is fixed on lower valve pneumatic cavity and lower valve gas storage At chamber connector；And the intermediate throughholes of lower valve gasket allow piston head to pass through.

Lower house is provided with lower valve air gate and lower valve air inlet, and lower valve air gate connects lower valve pneumatic cavity, lower valve air inlet Connect lower valve air storing cavity.

Further, described lower valve chamber seal is the sleeve with air gap washer, and air gap washer covers piston head Air gap between connected entrance.

Coupled piston can carry out up and down, and high limit position, piston head and connected entrance are located under coupled piston normality Flush or positioned at the edge of upper chamber one end of connected entrance, the now closed connected entrance of air gap washer, lower valve pneumatic cavity and lower valve storage Absolutely gas-tight is kept between air cavity；In skidding, the gases at high pressure of upper chamber enter pneumatic cavity, and coupled piston is in pneumatic cavity Gas pressure under move downward, piston head promotes lower valve chamber seal, and air gap washer is opened on top, lower valve pneumatic cavity and lower valve storage Connected between air cavity, the gas in lower valve pneumatic cavity enters lower valve air storing cavity by connected entrance, and is discharged by lower valve air inlet.

Further, described lower valve spring is volute spring, one end of lower valve spring slot and lower valve chamber seal One end of contact and wide-mouth and lower valve washer contacts.Bigger decrement can be obtained using volute spring, there is provided more sufficient returns Multiple power, the production space of upper valve air storing cavity can be also reduced to a certain extent, there is product to improving the intensity of upper valve body, saving resource Pole meaning.

The effect of lower Valve seal is to keep lower valve spring axially compressed, avoids spring sideslip.

Further, in described upper connector insertion upper valve cavity seal, upper connector outer wall is provided with sealing ring, close Seal is brought into close contact with valve chamber seal internal face.The effect of upper connector is the axial direction for keeping coupled piston to move up and down Property.

Further, described lower Valve seal side wall is provided with sealing ring, and the internal face of sealing ring and lower valve air storing cavity It is brought into close contact.Set the meaning of sealing ring to be to prevent gas leakage, keep air-tightness inside pneumatic operated valve, so as to ensure that pneumatic operated valve works Validity and accuracy.

Further, described lower valve plug insertion lower valve air storing cavity, lower valve plug side is provided with sealing ring, and lower valve air storing cavity Lower valve plug is fixed provided with lower valve plug block piece for inside；Lower valve is provided with the lower connection in insertion lower valve cavity seal beyond the Great Wall Part, lower connector outer wall is provided with sealing ring, and sealing ring is in close contact with lower valve cavity seal internal face.The work of lower valve plug With being, lower valve cavity seal is set to keep stable axial direction property in axial action.

Further, described lower valve plug block piece is snap ring.

Compared with prior art, the beneficial effects of the utility model are：

1. the utility model is detachably connected by upper valve body and lower valve body, it is easy to repair or safeguards.

2. the utility model sets valve element, the headroom of depositing of upper chamber is can adjust, is easy to carry during skidding The compensation of pressure is supplied, the effect of skidding is more obvious；When skidding is terminated, the headroom of depositing of upper chamber can be by Tapered small, air pressure inside reduces according to linear, will not occur to terminate to trample disappearing at once for brake force after brake pedal action Phenomenon, this technology can be applied to ramp assistant starting, using the teaching of the invention it is possible to provide certain reaction time reacts for driver, brings more preferable Driving experience.

3. the utility model sets upper valve chamber seal and lower valve chamber seal, air gap is carried out using air gap washer Closed, the two chambers of connection realize the conversion of connection and isolation, so as to control the circulation of gas, so set control effect It is good.

4. the utility model sets upper Valve seal control upper valve chamber seal, and is controlled using lower Valve seal and lower valve plug Lower valve chamber seal, compared with prior art, control effect are good, the motion of upper valve chamber seal and lower valve chamber seal Axial direction property is good.

5. upper valve spring of the present utility model and lower valve spring use taper spring, the compression degree of spring is bigger, band The restoring force come is stronger so that before skidding between the upper cavity of pneumatic operated valve and upper valve air storing cavity, lower valve pneumatic cavity with Air-tightness between lower valve air storing cavity is good；When terminating skidding, time of upper valve cavity seal and lower valve cavity seal It is multiple very competent, air-flow is cut off in time, improves the accuracy of brake.

Brief description of the drawings

, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment Accompanying drawing be briefly described, it will be appreciated that the following drawings show but section Example of the present utility model, therefore should Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also To obtain other related accompanying drawings according to these accompanying drawings.

Fig. 1 is sectional view of the present utility model.

Fig. 2 is stereogram of the present utility model.

Fig. 3 is the partial enlarged drawing at A in Fig. 1.

Fig. 4 is the partial enlarged drawing at B in Fig. 1.

Fig. 5 is the first structure sectional view that valve element is used in embodiment two.

Fig. 6 is second of structure sectional view that valve element is used in embodiment two.

Fig. 7 is the first structure sectional view that valve element is used in embodiment three.

Fig. 8 is second of structure sectional view that valve element is used in embodiment three.

It is entitled corresponding to reference in above-mentioned accompanying drawing：1- upper shells, 101- upper chamber, 102- upper valve air storing cavities, 103- upper valve pneumatic cavities, the upper valve air gates of 104-, 105- upper valve air inlets, 106- passages, 107- spring mountings, 108- Drive piston block piece, 109- upper valve block pieces, 2- piston bush, 201- compensation adjustment parts, 3- driving pistons, 301- reset bullets Spring, 4- upper valve chamber seals, the upper valve gaskets of 401-, the upper valve springs of 5-, the upper Valve seals of 6-, 7- lower houses, 700- lower valve outlets Mouthful, 701- lower valve air inlets, 702- lower valve pneumatic cavities, 703- lower valve air storing cavities, 704- lower valve block pieces, 8- coupled pistons, 801- upper connectors, 802- piston heads, 9- lower valve chamber seals, valve spring under 10-, Valve seal under 11-, valve plug under 12-.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings.Embodiment of the present utility model includes but is not limited to The following example.

Embodiment one

As shown in Figure 1, Figure 2, Figure 3 shows, the upper valve body adjusted is can compensate for present embodiment discloses a kind of cavity space, including it is upper Housing 1, the upper chamber 101 and upper valve air storing cavity 102 that upper shell 1 is communicated with, is additionally provided with upper valve pneumatic cavity 103；Upper chamber 101 Interior to be provided with valve element, upper valve air storing cavity 102 is provided with upper valve chamber seal 4, the upper valve pad positioned at the top of upper valve chamber seal 4 Piece 401, the upper Valve seal 6 being enclosed on chamber seal, the upper valve spring 5 being placed between chamber seal and upper Valve seal 6, put Upper valve block piece 109 in the upper bottom of Valve seal 6, upper valve pneumatic cavity 103 are located at the bottom of upper shell 1.

Preferably, upper chamber 101 and upper valve air storing cavity 102 are cylindrical chamber, and valve element profile is cylinder.

Valve element is made up of piston bush 2 and driving piston 3；Piston bush 2 is connected with upper shell 1 and piston bush 2 and upper shell 1 Between to form the first cavity；It is stepped piston and including three sections of upper, middle and lower to drive piston 3, the epimere of driving piston 3 with it is upper The internal face of housing 1 contacts or piston bush 2 contacts, and stage casing is located in piston bush 2, and hypomere is located at upper chamber 101 and upper valve gas storage At connected entrance between chamber 102.

Preferably, it be cylindrical step piston to drive piston 3, the driving epimere of piston 3, stage casing, hypomere diameter successively Reduce.

Piston bush 2 is provided with back-moving spring 301 and counterbalance spring 302, and back-moving spring 301 is connected to the upper of driving piston 3 Section, counterbalance spring 302 are connected to spring mountings 107 or compensation adjustment part 201.

Preferably, back-moving spring 301 is connected to the epimere of driving piston 3 among the present embodiment.

Upper shell 1 is provided with upper valve air inlet 105, and upper valve air inlet 105 connects upper valve air storing cavity 102, upper chamber 101 with it is upper Passage 106 is provided between valve pneumatic cavity 103.

Preferably, upper valve air inlet 105 is circular port, and internal thread is provided with the outside port of upper valve air inlet 105.

Piston bush 2 is cylindrical sleeve tubular or inverted T-shaped sleeve-shaped, and piston bush 2 is slidably connected with upper chamber 101 internal face； The quantity of back-moving spring 301 is at least one, when the quantity of back-moving spring 301 is for the moment, back-moving spring 301 is connected to driving piston 3 Epimere；When the quantity of back-moving spring 301 is more than for the moment, back-moving spring 301 is sequentially coaxially located on piston bush 2.

The outside of back-moving spring 301 is provided with counterbalance spring 302, and counterbalance spring 302 is connected to spring mountings 107；It is described Spring mountings 107 be to be located at ring catch inside upper chamber 101.

Preferably, piston bush 2 is inverted T-shaped sleeve-shaped, and the quantity of back-moving spring 301 is one.

The epimere side wall and stage casing side wall for driving piston 3 are provided with sealing ring, the sealing ring of epimere side wall with The internal face of upper chamber 101 is in close contact or is in close contact with the internal face of piston bush 2, the sealing ring and piston bush of stage casing side wall 2 internal faces are in close contact.

The outside of piston bush 2 of valve element is provided with sealing ring, sealing ring and the internal face close contact of upper chamber 101.

Preferably, drive piston 3 epimere side wall and stage casing side wall and piston bush 2 outside be provided with annular it is recessed Groove, sealing ring are arranged in annular groove；Sealing ring is flexible seal ring made of rubber.

The inside of upper chamber 101 is provided with driving piston block piece 108, or driving piston block piece is provided with piston bush 2 108。

Preferably, the inwall of upper chamber 101 is provided with annular groove in the present embodiment, and the inside of groove is provided with driving piston and stopped Part 108.

Upper valve chamber seal 4 is the sleeve with air gap washer, the air gap washer covering driving lower end of piston 3 and connected entrance Between air gap.

Preferably, upper valve chamber seal 4 is T-socket, and air gap washer is arranged on one end of its major part.

Upper valve spring 5 is volute spring, and one end of the upper slot of valve spring 5 is contacted with upper valve chamber seal 4 and wide-mouth One end contacts with upper Valve seal 6.

Upper valve block piece 109, spring mountings 107, driving piston block piece 108 are snap ring.

The present embodiment also discloses a kind of pneumatic operated valve：

As Figure 1 and Figure 4, with the pneumatic operated valve of previously described upper valve body, including connection is matched with the upper valve body Lower valve body；Described lower valve body includes lower house 7, the lower valve pneumatic cavity 702 and lower valve air storing cavity 703 that lower house 7 is communicated with； Coupled piston 8 is provided with lower valve pneumatic cavity 702, the upper end of coupled piston 8 is provided with the upper connector of connection upper valve chamber seal 4 801, the lower end of coupled piston 8 is provided with piston head 802, and piston head 802 is located at lower valve pneumatic cavity 702 and lower valve air storing cavity 703 At connected entrance, coupled piston 8, upper connector 801 and piston head 802 are sequentially communicated.

Preferably, lower valve body is attached with upper valve body by bolt, and lower valve pneumatic cavity 702 and upper valve pneumatic cavity 103 are matched somebody with somebody Closed pneumatic cavity is formed after conjunction.

Preferably, coupled piston 8 is cylinder, and upper connector 801 and piston head 802 are cylinder, and coupled piston 8th, upper connector 801 and piston head 802 are coaxially disposed.

Lower valve air storing cavity 703 is provided with lower valve chamber seal 9, and seal closing lower valve pneumatic cavity 702 is stored up with lower valve The connected entrance of air cavity 703, lower valve air storing cavity 703 are additionally provided with the lower valve gasket 901 positioned at the top of lower valve chamber seal 9, are enclosed on Lower Valve seal 11 on lower valve chamber seal 9, the lower valve spring being placed between lower valve chamber seal 9 and lower Valve seal 11 10th, the lower valve plug 12 of the lower bottom of Valve seal 11, the lower valve block piece 704 being connected with lower valve plug 12 are placed in.

Lower house 7 is provided with lower valve air gate 700 and lower valve air inlet 701, and lower valve air gate 700 connects lower valve pneumatic cavity 702, lower valve air inlet 701 connects lower valve air storing cavity 703.

Preferably, lower valve air gate 700 and lower valve air inlet 701 are circular port, in lower valve air gate 700 and lower valve Internal thread is provided with the outside port of air inlet 701.

Lower valve chamber seal 9 is the sleeve with air gap washer, between air gap washer covering piston head 802 and connected entrance Air gap.

Preferably, lower valve chamber seal 9 is T-socket, and air gap washer is arranged on one end of its major part.

Lower valve spring 10 is volute spring, and one end of the slot of lower valve spring 10 contacts and extensively with lower valve chamber seal 9 One end of mouth contacts with lower Valve seal 11.

Upper connector 801 is inserted in upper valve cavity seal, and the outer wall of upper connector 801 is provided with sealing ring, sealing ring and valve Cavity seal internal face is brought into close contact.

Preferably, upper connector 801 is integrally formed with coupled piston 8.

The lower side wall of Valve seal 11 is provided with sealing ring, and the internal face of sealing ring and lower valve air storing cavity 703 is brought into close contact.

Preferably, the side wall of lower Valve seal 11 is provided with annular groove, and sealing ring is arranged in annular groove；Sealing ring It is the flexible gaskets made of elastomeric material.

Lower valve plug 12 is embedded in lower valve air storing cavity 703, and the lower side of valve plug 12 is provided with sealing ring, and inside lower valve air storing cavity 703 Lower valve plug 12 is fixed provided with the lower block piece of valve plug 12；Lower valve plug 12 is provided with the lower company in insertion lower valve cavity seal Fitting, lower connector outer wall is provided with sealing ring, and sealing ring is in close contact with lower valve cavity seal internal face.

Preferably, lower connector is cylinder, and lower connector is integrally formed with lower valve plug 12.

Preferably, lower connector outer wall, the side of lower valve plug 12 are provided with annular groove, and sealing ring is set in groove； Sealing ring is the flexible gaskets made of elastomeric material.

The lower block piece of valve plug 12 is snap ring.

It is full content of the present utility model above, its operation principle is：

Mode as described above assembles pneumatic operated valve, while upper valve air inlet 105 is connected to brake air pump；Lower valve goes out Gas port 700 is connected to gas receiver, and lower valve air inlet 701 is connected to brake chamber.

During normal driving automobile, the gas that upper valve air inlet 105 enters is concentrated on inside upper valve air storing cavity 102；Lower valve is entered The gas that gas port 701 enters enters lower valve air storing cavity 703.

When stepping on automobile brake pedal, pedal force is passed to by driving piston 3 by the drive link of automotive interior, driven Piston 3 is down moved, and is contacted and is promoted upper valve chamber seal 4 to move downward, driving piston 3 and upper valve chamber seal 4 Contact surface seals, and now upper chamber 101 connects with upper valve air storing cavity 102, and the gases at high pressure to brake in air pump pass sequentially through air inlet Mouth, upper valve air storing cavity 102, connected entrance, upper chamber 101, pneumatic cavity；

When reaching certain air pressure in pneumatic cavity, coupled piston 8 is down moved, and piston head 802 is contacted and promoted downwards Lower valve chamber seal 9, the contact surface of piston head 13 and lower valve chamber seal 9 seal；Now lower valve pneumatic cavity 702 and lower valve Air storing cavity 703 connects；Gases at high pressure in gas receiver pass through lower valve air inlet 701, lower valve air storing cavity 703, connected entrance, lower valve Pneumatic cavity 702, lower valve air gate 700 realize skidding into brake chamber；Gas is gone out by upper valve in upper chamber 101 simultaneously Gas port 104 is discharged to up to another brake chamber and realizes skidding.

When unclamping automobile brake pedal, driving piston 3 playbacks in the presence of upper valve spring 5, upper chamber 101 and upper valve Air storing cavity 102 recovers state of isolation, and air gap occur in driving piston 3 and the contact surface of upper valve chamber seal 4, upper chamber 101 and upper Gas in valve pneumatic cavity 103 enters the hollow inside of upper valve chamber seal 4 by air gap and is down discharged into coupled piston 8 Portion, and discharged by lower valve plug 12；Now coupled piston 8 is up moved until returning back to normality in the presence of lower valve spring 10 There is air gap in position, the contact surface of piston head 13 and lower valve chamber seal 9, lower valve pneumatic cavity 702 with lower valve air storing cavity 703 Gas lower valve body down into the inside of lower valve plug 12 and is discharged by the air gap.

In above process, movable piston bush 2 is act as：Step on driving piston 3 and move downward promotion upper valve chamber Seal 4 connects upper chamber 101 and upper valve air storing cavity 102, and piston bush 2 moves on the net after air-flow enters upper chamber 101, increases Upper chamber 101 deposits headroom, avoids air pressure instantaneous value in upper chamber 101 excessive；In the process that coupled piston 8 moves upwards In, as upper valve pneumatic cavity 103 deposits the reduction of headroom, piston bush 2 continues up, and increase upper chamber 101 deposits gas sky Between, depositing the entirety of upper chamber 101 and upper valve pneumatic cavity 103, headroom is constant, then air pressure size keeps fixing, and will not increase connection The air pressure resistance that piston 8 is moved upwards, coupled piston 8 are easier to playback, also can be smoothly vented.

Embodiment two

Present embodiment discloses a kind of pneumatic operated valve, the building block and connected mode and embodiment of pneumatic operated valve in the present embodiment Identical in one, its difference is：

In the present embodiment, upper valve body employs the different valve element of structure.

As shown in Figure 5, Figure 6, the valve element in the present embodiment, piston bush 2 be longitudinal cross-section be " mountain " font sleeve, piston Set 2 is fixedly connected with upper chamber 101；The inside of piston bush 2 forms the second cavity with driving piston 3, is provided with and resets in the second cavity Spring 301, the upper end of back-moving spring 301 is connected to the driving epimere of piston 3 and lower end is connected to piston bush 2；The outer wall of piston bush 2 with it is upper The internal face of housing 1 forms upper end closed, the 3rd cavity of lower ending opening, and compensation adjustment part 201, the 3rd chamber are provided with the 3rd cavity The counterbalance spring 302 of connection compensation adjustment part 201 and the 3rd cavity top end is additionally provided with vivo；Described compensation adjustment part 201 is The internal face of back-up ring, back-up ring and the 3rd cavity is in close contact.

Preferably, the side wall of compensation adjustment part 201 is provided with annular groove, and sealing ring is provided with groove.Sealing ring makes The flexible gaskets made of elastomeric material.

The operation principle of this pneumatic operated valve is identical with embodiment one, just repeats no more herein.

Embodiment three

Present embodiment discloses a kind of pneumatic operated valve, the building block and connected mode and embodiment of pneumatic operated valve in the present embodiment Identical in one, its difference is：

In the present embodiment, upper valve body employs the different valve element of structure.

As shown in Figure 7, Figure 8, the valve element in the present embodiment, piston bush 2 be longitudinal cross-section be " mountain " font sleeve, piston Set 2 is slidably connected with upper chamber 101, and the inside of piston bush 2 forms the second cavity with driving piston 3, is provided with and resets in the second cavity Spring 301, the upper end of back-moving spring 301 is connected to the driving epimere of piston 3 and lower end is connected to piston bush 2；2 outer pars intramuralis of piston bush The 4th cavity provided with upper end closed, lower ending opening, the 4th cavity is interior to be provided with compensation adjustment part 201, is additionally provided with the 4th cavity Connect the counterbalance spring 302 of compensation adjustment part 201 and the 4th cavity top end；Described compensation adjustment part 201 is back-up ring, back-up ring with The internal face of 4th cavity is in close contact.

Preferably, the side wall of compensation adjustment part 201 is provided with annular groove, and sealing ring is provided with groove.Sealing ring makes The flexible gaskets made of elastomeric material.

The operation principle of this pneumatic operated valve is identical with embodiment one, just repeats no more herein.

According to above-described embodiment, the utility model can be realized well.It is what deserves to be explained is former based on above-mentioned design Reason, to solve same technical problem, some made on architecture basics disclosed in the utility model are without substance Change or polishing, used technical scheme essence is still as the utility model, therefore it should also be as of the present utility model In protection domain.

Claims (12)

1. cavity space can compensate for the upper valve body of regulation, including upper shell (1), the upper chamber (101) that upper shell (1) is communicated with With upper valve air storing cavity (102), upper valve pneumatic cavity (103) is additionally provided with；Valve element, upper valve air storing cavity (102) are provided with upper chamber (101) Upper valve gasket (401) provided with upper valve chamber seal (4), positioned at upper valve chamber seal (4) top, to be enclosed on upper valve chamber close Upper Valve seal (6) on sealing (4), the upper valve spring (5) being placed between upper valve chamber seal (4) and upper Valve seal (6), put Upper valve block piece (109) in upper Valve seal (6) bottom, upper valve pneumatic cavity (103) are located at the bottom of upper shell (1)；Its feature It is：

Valve element is made up of piston bush (2) and driving piston (3)；Piston bush (2) be connected with upper shell (1) and piston bush (2) with it is upper Housing forms the first cavity between (1)；Drive piston (3) for stepped piston and including three sections of upper, middle and lower, drive piston (3) Epimere contacts with upper shell (1) internal face or piston bush (2) contact, stage casing are located in piston bush (2), and hypomere is located at upper chamber (101) at the connected entrance between upper valve air storing cavity (102)；

Piston bush (2) is provided with back-moving spring (301) and counterbalance spring (302), and back-moving spring (301) one end is connected to piston bush (2), the other end is connected to the epimere of driving piston (3)；Counterbalance spring (302) one end is connected to piston bush (2), other end connection To spring mountings (107) or compensation adjustment part (201)；

Upper shell (1) is provided with upper valve air inlet (105) and upper valve air gate (104), upper valve air inlet (105) connection upper valve gas storage Chamber (102), upper valve air gate (104) connection upper chamber (101) and outside, between upper chamber (101) and upper valve pneumatic cavity (103) Provided with passage (106).

2. cavity space according to claim 1 can compensate for the upper valve body of regulation, it is characterised in that described piston bush (2) it is cylindrical sleeve tubular or inverted T-shaped sleeve-shaped, piston bush (2) is slidably connected with upper chamber (101) internal face；Back-moving spring (301) quantity is at least one.

3. cavity space according to claim 1 can compensate for the upper valve body of regulation, it is characterised in that described piston bush (2) it is double layer sleeve barrel, the internal layer bottom of piston bush (2) is connected with outer bottom, and groove, piston bush are formed between internal layer and outer layer (2) it is fixedly connected with upper chamber (101)；Piston bush (2) is internal to form the second cavity with driving piston (3)；Piston bush (2) outer wall The 3rd cavity of upper end closed, lower ending opening is formed with upper chamber (101) internal face, compensation adjustment part is provided with the 3rd cavity (201)；Described compensation adjustment part (201) is back-up ring, and the internal face of back-up ring and the 3rd cavity is in close contact.

4. cavity space according to claim 1 can compensate for the upper valve body of regulation, it is characterised in that described piston bush (2) it is double layer sleeve barrel, the internal layer bottom of piston bush (2) is connected with outer bottom, and groove is formed between internal layer and outer layer；Piston bush (2) it is fixedly connected with upper chamber (101), piston bush (2) is internal to form the second cavity with driving piston (3)；Piston bush (2) outer wall Inside is provided with upper end closed, the 4th cavity of lower ending opening, and compensation adjustment part (201) is provided with the 4th cavity；Described compensation Regulating part (201) is back-up ring, and the internal face of back-up ring and the 4th cavity is in close contact.

5. cavity space according to claim 1 can compensate for the upper valve body of regulation, it is characterised in that described upper chamber (101) internal be provided with driving piston block piece (108), or piston bush (2) is provided with driving piston block piece (108).

6. cavity space according to claim 1 can compensate for the upper valve body of regulation, it is characterised in that described upper valve chamber Seal (4) is the sleeve with air gap washer, and air gap washer covering drives air gap of the piston (3) between lower end and connected entrance.

7. cavity space according to claim 1 can compensate for the upper valve body of regulation, it is characterised in that described upper valve spring (5) it is volute spring, one end of upper valve spring (5) slot is contacted with upper valve chamber seal (4) and one end of wide-mouth and upper valve Packing ring (6) contacts.

8. a kind of pneumatic operated valve for the upper valve body that regulation is can compensate for using cavity space any one of claim 1-7, it is special Sign is, including the lower valve body of connection is matched with the upper valve body, and upper valve body and lower valve body are formed described in complete pneumatic operated valve Lower valve body includes lower house (7), the lower valve pneumatic cavity (702) and lower valve air storing cavity (703) that lower house (7) is communicated with；Lower valve Coupled piston (8) is provided with pneumatic cavity (702), the upper end of coupled piston (8) is provided with the upper company of connection upper valve chamber seal (4) Fitting (801), the lower end of coupled piston (8) are provided with piston head (802), and piston head (802) is located at lower valve pneumatic cavity (702) with At the connected entrance of valve air storing cavity (703)；Coupled piston (8), upper connector (801), piston head (802) insertion；

Lower valve air storing cavity (703) is provided with lower valve chamber seal (9), and the seal is located at lower valve pneumatic cavity (702) and lower valve The connected entrance of air storing cavity (703), lower valve air storing cavity (703) are additionally provided with the lower valve gasket positioned at lower valve chamber seal (9) top (901) the lower Valve seal (11), being enclosed on lower valve chamber seal (9), is placed in lower valve chamber seal (9) and lower Valve seal (11) lower valve spring (10) between, the lower valve plug (12) for being placed in lower Valve seal (11) bottom, are connected down with lower valve plug (12) Valve block piece (704)；

Lower house (7) is provided with lower valve air gate (700) and lower valve air inlet (701), and lower valve air gate (700) connection lower valve is pneumatic Chamber (702), lower valve air inlet (701) connection lower valve air storing cavity (703).

9. pneumatic operated valve according to claim 8, it is characterised in that described lower valve chamber seal (9) is with air gap The sleeve of packing ring, air gap of the air gap washer covering piston head (802) between connected entrance.

10. pneumatic operated valve according to claim 8, it is characterised in that described lower valve spring (10) is volute spring, lower valve One end of the slot of spring (10) contacts with lower valve chamber seal (9) and one end of wide-mouth contacts with lower Valve seal (11).

11. pneumatic operated valve according to claim 8, it is characterised in that described upper connector (801) insertion upper valve cavity is close In sealing, upper connector (801) outer wall is provided with sealing ring, and sealing ring is brought into close contact with valve chamber seal internal face.

12. pneumatic operated valve according to claim 8, it is characterised in that the embedded lower valve air storing cavity of described lower valve plug (12) (703), lower valve plug (12) side is provided with sealing ring, and lower valve plug (12) block piece is provided with inside lower valve air storing cavity (703) under Valve plug (12) is fixed；Lower valve plug (12) is provided with the lower connector in insertion lower valve cavity seal, lower connector outer wall Sealing ring is provided with, and sealing ring is in close contact with lower valve cavity seal internal face；Lower connector is interior with lower valve plug (12) Portion penetrates.