CN204196647U - Suspension valve, hydro pneumatic suspension control system and engineering truck - Google Patents
Suspension valve, hydro pneumatic suspension control system and engineering truck Download PDFInfo
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- CN204196647U CN204196647U CN201420192207.9U CN201420192207U CN204196647U CN 204196647 U CN204196647 U CN 204196647U CN 201420192207 U CN201420192207 U CN 201420192207U CN 204196647 U CN204196647 U CN 204196647U
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- energy storage
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Abstract
The utility model relates to a kind of suspension valve, hydro pneumatic suspension control system and engineering truck, hydro pneumatic suspension control system is used for controlling hydro pneumatic suspension, hydro pneumatic suspension is included in two suspension oil cylinders and two energy storages of vehicle bridge bilateral symmetry layout, hydro pneumatic suspension control system is included in two suspension valves that vehicle bridge bilateral symmetry is arranged, the fluid chamber of energy storage is connected with the rod chamber fluid of the rodless cavity of the suspension oil cylinder of this side with the suspension oil cylinder of offside respectively by the suspension valve of this side, fluid passage between the rod chamber being in the fluid chamber of the energy storage of this side of rigid state lower suspension valve closure and the suspension oil cylinder of offside at hydro pneumatic suspension.When hydro pneumatic suspension of the present utility model is in rigid state, by the fluid passage between the fluid chamber of suspension valve closure energy storage and the rod chamber of suspension oil cylinder, eliminate in existing hydro pneumatic suspension and cause vehicle bridge progressively downward trend because energy storage pressure is not enough or a certain vehicle bridge is overweight, stop vehicle bridge to decline, improve the safety of complete machine.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of suspension valve, hydro pneumatic suspension control system and engineering truck.
Background technology
Suspension is the general name of all force transmission connections between the vehicle frame (comprising self-supporting body) of automobile and vehicle bridge (also claiming axletree), road surface is passed to vehicle frame to after the processing effectively of vehicle tyre, buffering is passed to the impulsive force of vehicle frame or vehicle body by uneven road surface, and the vibration caused thus that decays, with the traveling ensureing that automobile can be smooth-going.
Hydro pneumatic suspension refers to that, using fluid transmission of pressure, with a kind of suspension of unreactable gas (being generally nitrogen) as elastic medium, elastic element adopts energy storage, and damping element is then the cutoff port, check valve etc. of suspension oil cylinder inside.Adopt the full Terrain Cranes of hydro pneumatic suspension can solve mobile crane in translation crossing ability lower, the problems such as inadaptable complicated territorial environment, enable vehicle adapt to more complicated severe ground; Hydro pneumatic suspension has variation rigidity characteristic, can improve vehicle riding comfort and safety.
As shown in Figure 1, be the structural representation of hydro pneumatic suspension in existing hydro pneumatic suspension control system.In FIG, hydro pneumatic suspension forms primarily of two suspension oil cylinder a2 and four guide push rod a1, suspension oil cylinder a2 symmetrical and and vertical guide have angle and be in tilted layout between wheel and vehicle frame, its upper and lower two ends adopt articulated manner to be connected on vehicle frame and axletree (steeraxle is axletree stub), can only axial force be born, mainly play and bear vertical load and roll stable effect.Four guide push rod a1 divide two-layer being up and down staggeredly arranged, there is a horizontal sextant angle in two, general upper strata propelling rod a1 and longitudinal direction of car center, lower floor two propelling rod a1 and longitudinal direction of car center parallel, four propelling rod a1 two ends also adopt articulated manner to connect, and mainly work to bear vehicle traction and braking force and wheel alignment.
In left and right, one end of two suspension oil cylinder a2 is also connected with two, left and right energy storage a3 and suspension valve a4 respectively, the hydraulic principle schematic diagram that concrete type of attachment is shown in Figure 2.In fig. 2, hydro pneumatic suspension realizes the rigid state of hydro pneumatic suspension and the switching of elastic stage by the operation of suspension valve a4, and the elevating function of hydro pneumatic suspension.
When gas source control system does not provide pressure signal, pneumatic valve Y1 and Y2 in suspension valve a4 is all in left working position, and corresponding oil circuit is off condition, and the large chamber of suspension oil cylinder a2 and the connection of energy storage a3 disconnect, and now suspension is in rigid state; When gas source control system provides pressure signal, pneumatic valve Y1 and Y2 is all in right working position, the large and small oil pocket of side suspension oil cylinder a2 is communicated with each other with little, the large oil pocket of opposite side suspension oil cylinder a2 respectively, and be connected with corresponding energy storage a3, suspension oil cylinder a2 retractable nitrogen in compress energy storage device a3, play the effect of buffering and absorbing vibrational energy, now whole suspension fork mechanism is in elastic stage.When Hydraulic Pump a5 is in running order, gas source control system provides pressure signal, and pneumatic valve Y1 and Y2 is all in right working position.When electromagnetic valve Y3, Y4 in suspension valve a4 obtain electric, then suspension oil cylinder a2 stretches out due to size cavity pressure difference, and now vehicle frame raises; When electromagnetic valve Y5, Y6 in suspension valve a4 obtain electric, then suspension oil cylinder a2 retracts under the effect of vehicle frame gravity, and now vehicle frame reduces.
There is several shortcoming in existing hydro pneumatic suspension device:
1, get on the bus operation time vehicle bridge easily fall down: during due to crane job, Vertical Cylinders is needed to support ground, now chassis promotes, vehicle bridge is liftoff, the liftoff of suspension oil cylinder realizes by energy storage pressurize, if energy storage pressure is not enough or certain vehicle bridge is heavier, this hanging oil cylinder can fall down, vehicle bridge also can and then have a declining tendency, and affects the safety of complete machine.
2, energy storage maintenance or replacing inconvenience: because energy storage directly connects suspension oil cylinder loculus, the easy remaining pressure of energy storage, it is just passable that maintenance or replacing energy storage need to release pressure, and the easy maloperation of layman, causes danger.
3, impact large to suspension valve when car load falls: when particularly band is got on the bus, complete machine is heavier, suspension step-down operation is impacted large to solenoid directional control valve, affect the suspension valve life-span.
4, more dangerous during trailer: engine in situ or electrically break down, when vehicle cannot rely on the power of self to travel, need special trailer to draw, now, suspension oil cylinder meta works, and chassis center of gravity has certain height, and trailer has certain risk.
Utility model content
The purpose of this utility model proposes a kind of suspension valve, hydro pneumatic suspension control system and engineering truck, can avoid the problem fallen under causing hanging oil cylinder because energy storage pressure is not enough or vehicle bridge weight is comparatively large, stop vehicle bridge to decline, promote the safety of complete machine.
For achieving the above object, the utility model provides a kind of hydro pneumatic suspension control system, for controlling hydro pneumatic suspension, described hydro pneumatic suspension is included in two suspension oil cylinders and two energy storages of vehicle bridge bilateral symmetry layout, described hydro pneumatic suspension control system is included in two suspension valves that vehicle bridge bilateral symmetry is arranged, wherein, the fluid chamber of described energy storage is connected with the rod chamber fluid of the rodless cavity of the suspension oil cylinder of this side with the suspension oil cylinder of offside respectively by the suspension valve of this side, fluid passage under described hydro pneumatic suspension is in rigid state between the fluid chamber of energy storage of described this side of suspension valve closure and the rod chamber of the suspension oil cylinder of offside.
Further, described suspension valve comprises the first electromagnetic valve and the second electromagnetic valve, described first electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rod chamber of the suspension oil cylinder of offside, and described second electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rodless cavity of the suspension oil cylinder of this side.
Further, described suspension valve also comprises the first by pass valve, realizes the overflow protection of the fluid chamber of the energy storage to described this side of suspension valve.
Further, described suspension valve also comprises the first ball valve, can the pressure of fluid chamber of energy storage of this side of suspension valve described in manual releasing.
Further, described hydro pneumatic suspension control system also comprises the lift controil valve be arranged in oil-feed oil circuit and oil return circuit, realizes the extension and contraction control to two suspension oil cylinders corresponding to each vehicle bridge.
Further, described lift controil valve comprises the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve and the 6th electromagnetic valve, described 3rd electromagnetic valve and the 5th electromagnetic valve realize open and close controlling to the fluid passage between the rod chamber of two suspension oil cylinders corresponding to oil-feed oil circuit and each vehicle bridge respectively, and described 4th electromagnetic valve and the 6th electromagnetic valve realize open and close controlling to the fluid passage between the rodless cavity of two suspension oil cylinders corresponding to oil return circuit and each vehicle bridge respectively.
Further, described lift controil valve also comprises the second by pass valve and the 3rd by pass valve, on the fluid passage of the rodless cavity that described second by pass valve and the 3rd by pass valve are separately positioned on two suspension oil cylinders corresponding to each vehicle bridge separately and between described 4th electromagnetic valve and the 6th electromagnetic valve.
Further, described lift controil valve also comprises the second ball valve and the 3rd ball valve, can the pressure of rodless cavity of two suspension oil cylinders corresponding to each vehicle bridge of manual releasing.
For achieving the above object, the utility model additionally provides a kind of engineering truck, comprises vehicle frame, at least two vehicle bridge and the hydro pneumatic suspension corresponding to each vehicle bridge, wherein, also comprises aforesaid hydro pneumatic suspension control system.
For achieving the above object, the utility model additionally provides suspension valve, comprising the first electromagnetic valve and the second electromagnetic valve, described first electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rod chamber of the suspension oil cylinder of offside, and described second electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rodless cavity of the suspension oil cylinder of this side.
Further, described suspension valve also comprises the first by pass valve, realizes the overflow protection of the fluid chamber of the energy storage to described this side of suspension valve.
Further, described suspension valve also comprises the first ball valve, can the pressure of fluid chamber of energy storage of this side of suspension valve described in manual releasing.
Based on technique scheme, energy storage in hydro pneumatic suspension of the present utility model needs to be communicated with by the oil pocket of suspension valve with suspension oil cylinder, under hydro pneumatic suspension is in rigid state, fluid passage between the fluid chamber of suspension valve closure energy storage and the rod chamber of suspension oil cylinder, make directly not to be connected between energy storage with suspension oil cylinder, and isolated by suspension valve, thus eliminate in existing hydro pneumatic suspension and cause vehicle bridge progressively downward trend because energy storage pressure is not enough or a certain vehicle bridge is overweight, stop vehicle bridge to decline, improve the safety of complete machine.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of hydro pneumatic suspension in existing hydro pneumatic suspension control system.
Fig. 2 is the hydraulic principle schematic diagram of existing hydro pneumatic suspension control system.
Fig. 3 is the hydraulic principle schematic diagram of an embodiment of the utility model hydro pneumatic suspension control system.
Fig. 4 is the hydraulic principle schematic diagram of another embodiment of the utility model hydro pneumatic suspension control system.
Detailed description of the invention
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 3, be the hydraulic principle schematic diagram of an embodiment of the utility model hydro pneumatic suspension control system.In the present embodiment, hydro pneumatic suspension control system is used for controlling hydro pneumatic suspension, and hydro pneumatic suspension is included in two suspension oil cylinders, 3,4 and two energy storages 4,5 that vehicle bridge bilateral symmetry is arranged, concrete form can with reference to the hydro pneumatic suspension shown in figure 1.Hydro pneumatic suspension control system is included in two suspension valves 6,7 that vehicle bridge bilateral symmetry is arranged.The fluid chamber of energy storage 4 is connected with the rod chamber fluid of the rodless cavity of the suspension oil cylinder 2 of this side with the suspension oil cylinder 3 of offside respectively by the suspension valve 6 of this side, and the fluid chamber of energy storage 5 is connected with the rod chamber fluid of the rodless cavity of the suspension oil cylinder 3 of this side with the suspension oil cylinder 2 of offside respectively by the suspension valve 7 of this side.When hydro pneumatic suspension is in rigid state, the fluid passage between the fluid chamber of energy storage 4,5 of this side and the rod chamber of the suspension oil cylinder 3,2 of offside closed respectively by suspension valve 6,7.
In the hydro pneumatic suspension control system of the present embodiment, can by Hydraulic Pump 1 for two suspension oil cylinders 2,3 provide power, utilize energy storage 4,5 for providing damping of vibrations in vehicle travel process, 6,7, suspension valve is used for coordinating the various mode of operations realizing hydro pneumatic suspension with other component part.When the fluid passage between the fluid chamber of energy storage 4,5 of this side and the rod chamber of the suspension oil cylinder 3,2 of offside opened by suspension valve 6,7, the rodless cavity of suspension oil cylinder 2 and the rod chamber of suspension oil cylinder 3 are communicated with each other, and communicate with the fluid chamber of the energy storage 4 of this side, and the rodless cavity of the rod chamber of suspension oil cylinder 2 and suspension oil cylinder 3 is communicated with each other, and communicate with the fluid chamber of the energy storage 5 of offside.Like this, suspension oil cylinder 2,3 retractable nitrogen in compress energy storage device 4,5, play the effect of buffering and absorbing vibrational energy, whole suspension fork mechanism was both in elastic stage.And when the fluid passage between the fluid chamber of energy storage 4,5 of this side and the rod chamber of the suspension oil cylinder 3,2 of offside closed by suspension valve 6,7, rod chamber and the rodless cavity of suspension oil cylinder 2,3 are all in the state of shutting, now hydro pneumatic suspension is in rigid state, and rigid state is non-driving state.
Different from the practical function of the suspension valve of existing hydro pneumatic suspension control system, suspension valve in the present embodiment can play the effect of the rod chamber of closed suspension oil cylinder under rigid state, but not realized by the rod chamber pressurize of energy storage to suspension oil cylinder, therefore fall under just avoiding the hanging oil cylinder caused because energy storage pressure is not enough or certain vehicle bridge is heavier, vehicle bridge also and then can have the problem of decline, therefore improves the safety of complete machine.
Suspension valve can be made up of multiple electromagnetic valve, suspension valve arrangement such as shown in Fig. 3, suspension valve 6 comprises the first electromagnetic valve Y1 and the second electromagnetic valve Y2, first electromagnetic valve Y1 realizes open and close controlling to the fluid passage between the fluid chamber of the energy storage 4 of this side of suspension valve 6 and the rod chamber of the suspension oil cylinder 3 of offside, and the second electromagnetic valve Y2 realizes open and close controlling to the fluid passage between the fluid chamber of the energy storage 4 of this side of suspension valve 6 and the rodless cavity of the suspension oil cylinder 2 of this side.And suspension valve 7 comprises the first electromagnetic valve Y5 and the second electromagnetic valve Y6, first electromagnetic valve Y5 realizes open and close controlling to the fluid passage between the fluid chamber of the energy storage 5 of this side of suspension valve 7 and the rod chamber of the suspension oil cylinder 2 of offside, and the second electromagnetic valve Y6 realizes open and close controlling to the fluid passage between the fluid chamber of the energy storage 5 of this side of suspension valve 7 and the rodless cavity of the suspension oil cylinder 3 of this side.
For suspension valve arrangement, suspension valve 6,7 can further include first by pass valve Y3, Y7, realizes the overflow protection of the fluid chamber of the energy storage 4,5 to this side of suspension valve 6,7, avoids the fluid chamber pressure of energy storage 4,5 excessive.In addition, in suspension valve 6,7, can also increase by first ball valve Y4, Y8 further, utilize first ball valve Y4, Y8 can make the pressure of the fluid chamber of the energy storage 4,5 of this side of operating personal manual releasing suspension valve 6,7.First ball valve closed condition during normal use, and when operating personal needs to safeguard energy storage or change, operating personal directly can turn on ball valve, makes the hydraulic oil of energy storage fluid chamber all flow back to fuel tank, fluid pressure in energy storage can be discharged fast, relievedly can take off energy storage.
Hydro pneumatic suspension control system of the present utility model, except carrying out the rigid state of hydro pneumatic suspension and the switching of elastic stage, can also realize the elevating function of hydro pneumatic suspension further.As shown in Figure 4, be the hydraulic principle schematic diagram of another embodiment of the utility model hydro pneumatic suspension control system.Compared with a upper embodiment, the present embodiment is provided with lift controil valve 9 further in the oil-feed oil circuit and oil return circuit of hydro pneumatic suspension control system, realizes the extension and contraction control to two suspension oil cylinders corresponding to each vehicle bridge.
Elevating control can be carried out by the hydro pneumatic suspension that a lift controil valve is corresponding to multiple vehicle bridge in engineering truck, lift controil valve 9 specifically can comprise the 3rd electromagnetic valve Y9, 4th electromagnetic valve Y12, 5th electromagnetic valve Y13 and the 6th electromagnetic valve Y16, 3rd electromagnetic valve Y9 and the 5th electromagnetic valve Y13 realizes open and close controlling to the fluid passage between the rod chamber of two suspension oil cylinders corresponding to oil-feed oil circuit and each vehicle bridge respectively, 4th electromagnetic valve Y12 and the 6th electromagnetic valve 16 realize open and close controlling to the fluid passage between the rodless cavity of two suspension oil cylinders corresponding to oil return circuit and each vehicle bridge respectively.
For the elevating control function of the suspension oil cylinder 2 in Fig. 4, when Hydraulic Pump 1 is in running order, electric control system provides electric signal, makes the first electromagnetic valve Y1 in suspension valve 6, the second electromagnetic valve Y2, the first by pass valve Y3 and the first ball valve Y4 all be in non-spring working position.When the 3rd electromagnetic valve Y9, the 5th electromagnetic valve Y13 obtain electric, then suspension oil cylinder 2 stretches out due to size cavity pressure difference, and now vehicle frame raises; And when the 4th electromagnetic valve Y12, the 6th electromagnetic valve Y16 obtain electric, then suspension oil cylinder 2 is retracted under the effect of vehicle frame gravity, now vehicle frame reduces.
Because engineering truck usual complete machine weight is very heavy; axle load is more than 12 tons in extreme circumstances; therefore also to consider that protection solenoid directional control valve group is from excessive impact; therefore can increase in lift controil valve 9 further and be provided with the second by pass valve Y10 and the 3rd by pass valve Y14 of certain pressure, on the fluid passage of the rodless cavity that the second by pass valve Y10 and the 3rd by pass valve Y14 is separately positioned on two the suspension oil cylinders 2,3 corresponding to each vehicle bridge separately and between the 4th electromagnetic valve Y12 and the 6th electromagnetic valve Y16.When electromagnetic valve Y1, Y2, Y3, Y4, Y12, Y16 obtain electric, fluid flows to the second by pass valve Y10 and the 3rd by pass valve Y14 from suspension oil cylinder 2,3 inside, the oil pressure relief of its setting is equivalent to increase a kind of towing force to vehicle, exceed overflow set pressure vehicle frame could decline, realize releasing the pressure impact effect.
Lift controil valve 9 can further include the second ball valve Y11 and the 3rd ball valve Y15, can the pressure of rodless cavity of two suspension oil cylinders 2,3 corresponding to each vehicle bridge of manual releasing.When engineering vehicle chassis is electric or engine in situ breaks down, when engineering truck will be dragged to maintenance point, the second ball valve Y11 and the 3rd ball valve Y15 can be utilized to be released by the pressure oil liquid in the rodless cavity of suspension oil cylinder 2,3 oil sump tank 8, thus realize the manual reduction of vehicle frame, be conducive to decentralization, increase safety during trailer.
Above-mentioned each hydro pneumatic suspension control system embodiment of the present utility model is applicable to all kinds of engineering truck, and engineering truck comprises vehicle frame, at least two vehicle bridge and the hydro pneumatic suspension corresponding to each vehicle bridge, also comprises foregoing hydro pneumatic suspension control system.By suspension valve of the present utility model under hydro pneumatic suspension is in rigid state, close the fluid passage between the fluid chamber of energy storage and the rod chamber of suspension oil cylinder, eliminate in existing hydro pneumatic suspension and cause vehicle bridge progressively downward trend because energy storage pressure is not enough or a certain vehicle bridge is overweight, stop vehicle bridge to decline, improve the safety of complete machine.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (12)
1. a hydro pneumatic suspension control system, for controlling hydro pneumatic suspension, described hydro pneumatic suspension is included in two suspension oil cylinders and two energy storages of vehicle bridge bilateral symmetry layout, described hydro pneumatic suspension control system is included in two suspension valves that vehicle bridge bilateral symmetry is arranged, it is characterized in that, the fluid chamber of described energy storage is connected with the rod chamber fluid of the rodless cavity of the suspension oil cylinder of this side with the suspension oil cylinder of offside respectively by the suspension valve of this side, fluid passage under described hydro pneumatic suspension is in rigid state between the fluid chamber of energy storage of described this side of suspension valve closure and the rod chamber of the suspension oil cylinder of offside.
2. hydro pneumatic suspension control system according to claim 1, it is characterized in that, described suspension valve comprises the first electromagnetic valve and the second electromagnetic valve, described first electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rod chamber of the suspension oil cylinder of offside, and described second electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rodless cavity of the suspension oil cylinder of this side.
3. hydro pneumatic suspension control system according to claim 2, is characterized in that, described suspension valve also comprises the first by pass valve, realizes the overflow protection of the fluid chamber of the energy storage to described this side of suspension valve.
4. hydro pneumatic suspension control system according to claim 3, is characterized in that, described suspension valve also comprises the first ball valve, can the pressure of fluid chamber of energy storage of this side of suspension valve described in manual releasing.
5. according to the arbitrary described hydro pneumatic suspension control system of Claims 1 to 4, it is characterized in that, described hydro pneumatic suspension control system also comprises the lift controil valve be arranged in oil-feed oil circuit and oil return circuit, realizes the extension and contraction control to two suspension oil cylinders corresponding to each vehicle bridge.
6. hydro pneumatic suspension control system according to claim 5, it is characterized in that, described lift controil valve comprises the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve and the 6th electromagnetic valve, described 3rd electromagnetic valve and the 5th electromagnetic valve realize open and close controlling to the fluid passage between the rod chamber of two suspension oil cylinders corresponding to oil-feed oil circuit and each vehicle bridge respectively, and described 4th electromagnetic valve and the 6th electromagnetic valve realize open and close controlling to the fluid passage between the rodless cavity of two suspension oil cylinders corresponding to oil return circuit and each vehicle bridge respectively.
7. hydro pneumatic suspension control system according to claim 6, it is characterized in that, described lift controil valve also comprises the second by pass valve and the 3rd by pass valve, on the fluid passage of the rodless cavity that described second by pass valve and the 3rd by pass valve are separately positioned on two suspension oil cylinders corresponding to each vehicle bridge separately and between described 4th electromagnetic valve and the 6th electromagnetic valve.
8. hydro pneumatic suspension control system according to claim 7, is characterized in that, described lift controil valve also comprises the second ball valve and the 3rd ball valve, can the pressure of rodless cavity of two suspension oil cylinders corresponding to each vehicle bridge of manual releasing.
9. an engineering truck, comprises vehicle frame, at least two vehicle bridge and the hydro pneumatic suspension corresponding to each vehicle bridge, it is characterized in that, also comprises the arbitrary described hydro pneumatic suspension control system of claim 1 ~ 8.
10. a suspension valve, it is characterized in that, comprise the first electromagnetic valve and the second electromagnetic valve, described first electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rod chamber of the suspension oil cylinder of offside, and described second electromagnetic valve realizes open and close controlling to the fluid passage between the fluid chamber of energy storage of described this side of suspension valve and the rodless cavity of the suspension oil cylinder of this side.
11. suspension valves according to claim 10, is characterized in that, described suspension valve also comprises the first by pass valve, realize the overflow protection of the fluid chamber of the energy storage to described this side of suspension valve.
12. suspension valves according to claim 11, is characterized in that, described suspension valve also comprises the first ball valve, can the pressure of fluid chamber of energy storage of this side of suspension valve described in manual releasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192207.9U CN204196647U (en) | 2014-04-15 | 2014-04-15 | Suspension valve, hydro pneumatic suspension control system and engineering truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192207.9U CN204196647U (en) | 2014-04-15 | 2014-04-15 | Suspension valve, hydro pneumatic suspension control system and engineering truck |
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| Publication Number | Publication Date |
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| CN204196647U true CN204196647U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420192207.9U Expired - Fee Related CN204196647U (en) | 2014-04-15 | 2014-04-15 | Suspension valve, hydro pneumatic suspension control system and engineering truck |
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| CN (1) | CN204196647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879257A (en) * | 2014-04-15 | 2014-06-25 | 徐州重型机械有限公司 | Suspension valves, oil gas suspension control system and engineering vehicle |
| CN109808435A (en) * | 2019-03-19 | 2019-05-28 | 徐工集团工程机械股份有限公司科技分公司 | Suspension system and vehicle |
-
2014
- 2014-04-15 CN CN201420192207.9U patent/CN204196647U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879257A (en) * | 2014-04-15 | 2014-06-25 | 徐州重型机械有限公司 | Suspension valves, oil gas suspension control system and engineering vehicle |
| CN103879257B (en) * | 2014-04-15 | 2017-03-01 | 徐州重型机械有限公司 | Suspension valve, hydro pneumatic suspension control system and engineering truck |
| CN109808435A (en) * | 2019-03-19 | 2019-05-28 | 徐工集团工程机械股份有限公司科技分公司 | Suspension system and vehicle |
| CN109808435B (en) * | 2019-03-19 | 2024-03-15 | 徐工集团工程机械股份有限公司科技分公司 | Suspension system and vehicle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20190415 |