CN207360017U - The suspension system of quasi- zero stiffness based on hydro pneumatic suspension - Google Patents
The suspension system of quasi- zero stiffness based on hydro pneumatic suspension Download PDFInfo
- Publication number
- CN207360017U CN207360017U CN201721478393.2U CN201721478393U CN207360017U CN 207360017 U CN207360017 U CN 207360017U CN 201721478393 U CN201721478393 U CN 201721478393U CN 207360017 U CN207360017 U CN 207360017U
- Authority
- CN
- China
- Prior art keywords
- cylinders
- vertical
- suspension system
- solenoid valve
- accumulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Abstract
The utility model discloses a kind of suspension system of the quasi- zero stiffness based on hydro pneumatic suspension, which includes three oil cylinders and two accumulators.One end connection vehicle bridge other end connecting vehicle frame of three oil cylinders, one of them is Vertical Cylinders, and another two is that cross cylinder is arranged symmetrically relative to Vertical Cylinders.One accumulator is connected by solenoid valve and pipeline with the big chamber of Vertical Cylinders, and another accumulator is all connected again by solenoid valve and pipeline with the big chamber of two cross cylinders.Vertical Cylinders and cross cylinder have independent hydraulic control system respectively, the two hydraulic control systems share a hydraulic pump.The suspension system have it is oil-filled, drain the oil and rigidity and elastic conversion function, and the quasi- zero stiffness characteristic near equilbrium position can be realized by the parameter of two accumulator of Proper Match.The system is a kind of passive hydro-pneumatic suspension system, and cost is low, and safety coefficient is high.
Description
Technical field
A kind of suspension system is the utility model is related to, more particularly, to a kind of new hydro pneumatic suspension that quasi- zero stiffness can be achieved
System.
Background technology
As vehicle technology develops, hydro-pneumatic suspension system is widely used due to its nonlinear characteristic.Suspension it is firm
It is more obvious to spend its smaller effectiveness in vibration suppression, but suspension travel is larger.But current hydro pneumatic suspension is larger in vehicle balance position stiffness, shadow
Ring its damping property.
The content of the invention
The purpose of the utility model patent is to solve the problems, such as that vehicle is poor in complex working condition downward driving ride comfort, there is provided
A kind of relative inexpensiveness, Novel oil gas suspension system easy for installation.The utility model, which designs a kind of suspension, makes it flat
The rigidity of position of weighing is approximately zero, and other positions rigidity and displacement are into nonlinear hydro-pneumatic suspension system.
The utility model includes vehicle frame, vehicle bridge, mounting bracket, Vertical Cylinders, cross cylinder, fluid pressure line, the first damping
Hole, the second damping hole, the first accumulator, the second accumulator, the first solenoid valve, second solenoid valve, the 3rd solenoid valve, the 4th electromagnetism
Valve, the 5th solenoid valve, the 6th solenoid valve, the first overflow valve, the second overflow valve, the 3rd overflow valve, fuel tank, hydraulic pump, filter
And shut-off valve, each vehicle bridge include two systems, left and right sides respectively has set of system, the vertical placement of Vertical Cylinders, and Vertical Cylinders are held
By vehicle frame vertical load, Vertical Cylinders one end is hinged by mounting bracket and vehicle bridge, and the Vertical Cylinders other end passes through mounting bracket
It is hinged with vehicle frame；Two cross cylinders are arranged symmetrically relative to Vertical Cylinders, and each cross cylinder passes through two mounting brackets
It is hinged respectively with vehicle bridge and vehicle frame；When vehicle is in equilbrium position, two cross cylinders are horizontal positioned, are not subject to vertical load；
First accumulator is connected by fluid pressure line by the first solenoid valve with the big chamber of Vertical Cylinders；Second accumulator passes through hydraulic tube
Road is connected by big chamber of the 6th solenoid valve respectively with two cross cylinders.The effect of first solenoid valve and the 6th solenoid valve can make
Suspension is in elasticity and rigid state.For the first accumulator of protection and the second accumulator, pacify between the first accumulator and fuel tank
The first overflow valve is filled, the 3rd overflow valve is installed between the second accumulator and fuel tank.Fuel tank pass sequentially through filter, shut-off valve with
Hydraulic pump inlet communication, it is oil-filled to be carried out to suspension system.The outlet of hydraulic pump is provided with the second overflow valve with fuel tank, to protect
It is without damage to protect hydraulic pump.Suspension system is realized by the first damping hole, second solenoid valve, the second damping hole, the 5th solenoid valve
Drain the oil to suspension system, the speed of draining the oil of the first damping hole and the second damping hole control suspension system hydraulic oil.
Vertical Cylinders, two cross cylinders small chamber and atmosphere.The small chamber of Vertical Cylinders, two cross cylinders
It can be connected by oil pipe with the big chamber of respective oil cylinder.The cylinder rod of Vertical Cylinders can be hinged with vehicle bridge, and the cylinder barrels of Vertical Cylinders also can be with
Vehicle frame is hinged；The cylinder rod of cross cylinder can be hinged with vehicle bridge, and the cylinder barrel of cross cylinder can be also hinged with vehicle frame.
The suspension system refers to the suspension system of the quasi- zero stiffness based on hydro pneumatic suspension.
The advantages of the utility model patent is：
1st, the utility model can change the firm of suspension system by coordinating volume, the pre-charging pressure of two accumulation of energys of change
Degree.Rigidity of the suspension system in equilbrium position can be adjusted to positive rigidity, zero stiffness and negative stiffness.As long as the first accumulator and second
Accumulator parameter designing is reasonable, you can guarantee is suspended in zero stiffness subject to the rigidity of equilbrium position, so as to improve vehicle traveling
Ride comfort.
2nd, this hydro pneumatic suspension is still Nonlinear Suspension System, and the rigidity of suspension and the relation of displacement are still non-linear relation.It can fill
The damping property of hydro pneumatic suspension is waved in distribution.
3rd, two cross cylinders of this suspension system are arranged symmetrically, and two cross cylinder horizontal directions can phase to the active force of vehicle bridge
Mutually offset, improve the safety coefficient of vehicle bridge.
4th, this hydro-pneumatic suspension system is passive hydro-pneumatic suspension system, easy for installation, is designed and manufactured as this relative to actively
Suspension, semi-active suspension are low.
5th, suspension system can realize that rigidity is changed with elasticity, possess fill, function of draining the oil, and there is system pressure overload protection
Function.
6th, Vertical Cylinders and cross cylinder correspond to independent hydraulically controlled control system.This two sets of control systems share a hydraulic pressure
Pump, saves manufacture cost.
Brief description of the drawings
Fig. 1 is the structure diagram of the quasi- zero stiffness hydro-pneumatic suspension system of the utility model.
Fig. 2 is the knot for the quasi- zero stiffness hydro-pneumatic suspension system that each arrogant chamber of oil cylinder is connected with small chamber on the basis of Fig. 1
Structure schematic diagram.
Fig. 3 is in the cylinder barrel of Vertical Cylinders and cross cylinder quasi- zero stiffness hydro-pneumatic suspension system hinged with vehicle bridge at the same time
Structure diagram.
Fig. 4 is is hinged in Vertical Cylinders cylinder rod with vehicle bridge, two cross cylinder cylinder barrels and the hinged quasi- zero stiffness oil gas of vehicle bridge
The structure diagram of suspension system.
Fig. 5 is is hinged in Vertical Cylinders cylinder barrel with vehicle bridge, two cross cylinder cylinder rods and the hinged quasi- zero stiffness oil gas of vehicle bridge
The structure diagram of suspension system.
Wherein：1- vehicle frames；2- vehicle bridge；3- mounting brackets；4- Vertical Cylinders；5- cross cylinders；6- fluid pressure lines；7- first
Damping hole；The second damping holes of 71-；The first accumulators of 8-；The second accumulators of 81-；The first solenoid valves of 9-；91- second solenoid valves；
The 3rd solenoid valves of 92-；The 4th solenoid valves of 93-；The 5th solenoid valves of 94-；The 6th solenoid valves of 95-；The first overflow valves of 10-；101-
Two overflow valves；The 3rd overflow valves of 102-；11- fuel tanks；12- hydraulic pumps；13- filters；14- shut-off valves.
Embodiment
Please refer to Fig.1, shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the utility model include vehicle frame 1, vehicle bridge 2, mounting bracket 3, hang down
Straight oil cylinder 4, cross cylinder 5, fluid pressure line 6, the first damping hole 7, the second damping hole 71, the first accumulator 8, the second accumulator
81, the first solenoid valve 9, second solenoid valve 91, the 3rd solenoid valve 92, the 4th solenoid valve 93, the 5th solenoid valve 94, the 6th solenoid valve
95th, the first overflow valve 10, the second overflow valve 101, the 3rd overflow valve 102, fuel tank 11, hydraulic pump 12, filter 13 and shut-off valve
14, each vehicle bridge 2 includes two systems, and left and right sides respectively has set of system, 4 vertical placement of Vertical Cylinders, and Vertical Cylinders 4 bear car
Frame vertical load, 4 one end of Vertical Cylinders is hinged by mounting bracket 3 and vehicle bridge 2, and 4 other end of Vertical Cylinders passes through mounting bracket 3
It is hinged with vehicle frame 1；The cylinder rod of Vertical Cylinders 4 can be hinged with vehicle bridge 2, and the cylinder barrel of Vertical Cylinders 4 also can be hinged with vehicle frame 1；Two
Cross cylinder 5 is arranged symmetrically relative to Vertical Cylinders 4, each cross cylinder 5 by two mounting brackets 3 respectively with vehicle bridge 2
Hinged with vehicle frame 1, the cylinder rod of two cross cylinders 5 can be hinged with vehicle bridge 2, and the cylinder barrels of two cross cylinders 5 also can and car
Bridge 2 is hinged；When vehicle is in equilbrium position, two cross cylinders 5 are horizontal positioned, are not subject to vertical load；First accumulator 8 is logical
Fluid pressure line 6 is crossed to connect with the big chamber of Vertical Cylinders 4 by the first solenoid valve 9；Second accumulator 81 is passed through by fluid pressure line 6
Big chamber of 6th solenoid valve 95 respectively with two cross cylinders 5 connects.The effect of first solenoid valve 9 and the 6th solenoid valve 95 can
Suspension is set to be in elasticity and rigid state.To protect the first accumulator 8 and the second accumulator 81, in the first accumulator 8 and fuel tank
First overflow valve 10 is installed between 11, the 3rd overflow valve 102 is installed between the second accumulator 81 and fuel tank 11.Fuel tank 11 according to
It is secondary by filter 13, shut-off valve 14 and 12 inlet communication of hydraulic pump, it is oil-filled to be carried out to suspension system.Hydraulic pump 12 goes out
Mouth is provided with the second overflow valve 101 with fuel tank 11, to protect hydraulic pump 12 without damage.Suspension system by the first damping hole 7,
Second solenoid valve 91, the second damping hole 71, the 5th solenoid valve 94 realize and drain the oil to suspension system, the first damping hole 7 and second
Damping hole 71 controls the speed of draining the oil of suspension system hydraulic oil.
As shown in Figure 1,4, two cross cylinders 5 of Vertical Cylinders small chamber and atmosphere.As shown in Fig. 2, vertical oil
The small chamber of 4, two cross cylinders 5 of cylinder can also be connected by oil pipe with the big chamber of respective oil cylinder.As shown in figure 3, the cylinder of Vertical Cylinders 4
Cylinder also can be hinged with vehicle frame 1, and the cylinder barrel of two cross cylinders 5 also can be hinged with vehicle bridge 2.Vertical Cylinders 4 and cross cylinder 5
Cylinder barrel or cylinder rod are hinged with vehicle bridge 2 when can be different, and Fig. 4 is that the cylinder rod of Vertical Cylinders 4, the cylinder barrel of cross cylinder 5 and vehicle bridge 2 are cut with scissors
Connect, Fig. 5 is that the cylinder barrel of Vertical Cylinders 4, the cylinder rod of cross cylinder 5 and vehicle bridge 2 are hinged.
The suspension system refers to the suspension system of the quasi- zero stiffness based on hydro pneumatic suspension.
The course of work of the utility model：
1st, suspension normal operating conditions
Second solenoid valve 91, the 3rd solenoid valve 92, the 4th solenoid valve 93, the 5th solenoid valve 94 are closed.Control can be passed through at this time
Make the first solenoid valve 9 and the 6th solenoid valve 95 realizes that suspension is in rigidity and elastic stage.
When the first solenoid valve 9, the 6th solenoid valve 95 are closed, suspension is in rigid state, and suspension is without effectiveness in vibration suppression at this time,
Such a operating mode is mainly used for the workplace that suspension load is big and speed is relatively low；
When the first solenoid valve 9, the 6th solenoid valve 95 are opened, suspension is in elastic stage, and suspension can give full play to its vibration damping
Performance.During two 5 horizontality of cross cylinder, its length is most short, and Vertical Cylinders 4 are in equilibrium state.When being jumped in vehicle bridge 2,
Vertical Cylinders 4 compress, and the big chamber hydraulic oil of Vertical Cylinders 4 flows into the first accumulator 8 by 6 and first solenoid valve 9 of fluid pressure line, makes
First accumulator, 8 pressure rise；When being jumped in vehicle bridge 2, two 5 length of cross cylinder extend, its big cavity pressure reduces, and second
Hydraulic oil in accumulator 81 flows to the big chamber of cross cylinder 5 by the 6th solenoid valve 95 and hydraulic tube, at this time the second accumulator
81 pressure can reduce.When 2 times jumps of vehicle bridge, Vertical Cylinders 4 compress, and the big cavity pressure of Vertical Cylinders 4 reduces, the first accumulation of energy
Hydraulic oil in device 8 flows into 4 big chamber of Vertical Cylinders by the first solenoid valve 9 and fluid pressure line 6, at this time 8 pressure of the first accumulator
Reduce；When 2 times jumps of vehicle bridge, two 5 length of cross cylinder also extend, its big cavity pressure reduces, the liquid in the second accumulator 81
Pressure oil flows to the big chamber of cross cylinder 5 by the 6th magnet valve 95 and hydraulic tube, and the pressure of the second accumulator 81 can reduce at this time.
2nd, the oil-filled state of suspension system
91 and the 5th solenoid valve 94 of second solenoid valve is closed.First solenoid valve 9 and the 6th solenoid valve 95 are opened.
Shut-off valve 14 is opened, the 3rd solenoid valve 92 is opened, you can realize that the hydraulic system being connected to Vertical Cylinders 4 is oil-filled,
First accumulator, 8 pressure rise.
Shut-off valve 14 is opened, the 4th solenoid valve 93 is opened, you can realize that the hydraulic system being connected to two cross cylinders 5 is filled
Oil, 81 pressure rise of the second accumulator.
3rd, suspension system is drained the oil state
3rd solenoid valve 92 and the 4th solenoid valve 93 are closed.First solenoid valve 9 and the 6th solenoid valve 95 are opened.
Open second solenoid valve 91, you can realize that the hydraulic system being connected to Vertical Cylinders 4 is drained the oil, the first accumulator 8 is pressed
Power reduces.
Open the 5th solenoid valve 94, you can realize that the hydraulic system being connected to two cross cylinders 5 is drained the oil, the second accumulator 81
Pressure reduces.
By to the oil-filled of suspension system and draining the oil, the pressure of adjustable first whole 8 and second accumulator 81 of accumulator, and then
The rigidity of suspension system is adjusted, as long as the first whole 8 and second accumulator of accumulator, 81 relevant parameter Proper Match can be achieved to hang
The quasi- zero stiffness characteristic of frame system.
The main function of first overflow valve 10 protects the first accumulator 8 and its hydraulic system, when 8 pressure mistake of the first accumulator
High set more than the first overflow valve 10 limits, and the hydraulic oil in the first accumulator 8 can flow into fuel tank 11 by the first overflow valve 10.
Similarly, the main function of the 3rd overflow valve 102 protects the second accumulator 81 and its hydraulic system, when 81 pressure mistake of the second accumulator
High set more than the 3rd overflow valve 102 limits, and the hydraulic oil in the second accumulator 81 can flow into fuel tank by the 3rd overflow valve 102
11.The main function protection hydraulic pump 12 and its hydraulic system of second overflow valve 101, exceed when 12 outlet pressure of hydraulic pump is excessive
The setting limitation of second overflow valve 101, the hydraulic oil that hydraulic pump 12 exports can flow into fuel tank 11 by the second overflow valve 101.
For same vehicle bridge, to improve the anti-rolling capability of suspension, the size chamber of 2 left and right sides Vertical Cylinders 4 of vehicle bridge is not
Connection, the big chamber of left vertical oil cylinder 4 is connected with the small chamber of Right vertical oil cylinder 4, while 4 small chamber of left vertical oil cylinder and right side
4 big chamber of Vertical Cylinders connects.
The utility model can realize quasi- zero stiffness of the suspension system in equilbrium position, improve the ride performance of vehicle.
Claims (5)
- A kind of 1. suspension system of the quasi- zero stiffness based on hydro pneumatic suspension, it is characterised in that：Including vehicle frame (1), vehicle bridge (2), peace Fill stent (3), Vertical Cylinders (4), cross cylinder (5), fluid pressure line (6), the first damping hole (7), the second damping hole (71), the One accumulator (8), the second accumulator (81), the first solenoid valve (9), second solenoid valve (91), the 3rd solenoid valve (92), the 4th electricity Magnet valve (93), the 5th solenoid valve (94), the 6th solenoid valve (95), the first overflow valve (10), the second overflow valve (101), the 3rd are overflow Stream valve (102), fuel tank (11), hydraulic pump (12), filter (13) and shut-off valve (14), each vehicle bridge (2) include two systems, Left and right sides respectively has set of system, Vertical Cylinders (4) vertical placement, and Vertical Cylinders (4) bear vehicle frame vertical load, Vertical Cylinders (4) one end is hinged by mounting bracket (3) and vehicle bridge (2), and Vertical Cylinders (4) other end passes through mounting bracket (3) and vehicle frame (1) It is hinged；The cylinder rod of Vertical Cylinders (4) is hinged with vehicle bridge (2)；Two cross cylinders (5) are symmetrical relative to Vertical Cylinders (4) Arrangement, each cross cylinder (5) are hinged with vehicle bridge (2) and vehicle frame (1) respectively by two mounting brackets (3)；When vehicle exists During equilbrium position, two cross cylinders (5) are horizontal positioned, are not subject to vertical load；First accumulator (8) passes through fluid pressure line (6) connected by the first solenoid valve (9) with the big chamber of Vertical Cylinders (4)；Second accumulator (81) is passed through by fluid pressure line (6) Big chamber of 6th solenoid valve (95) respectively with two cross cylinders (5) connects；Pacify between the first accumulator (8) and fuel tank (11) The first overflow valve (10) is filled, the 3rd overflow valve (102) is installed between the second accumulator (81) and fuel tank (11)；Fuel tank (11) according to It is secondary by filter (13), shut-off valve (14) and hydraulic pump (12) inlet communication, it is oil-filled to be carried out to suspension system；Hydraulic pump (12) outlet is provided with the second overflow valve (101) with fuel tank (11)；Suspension system passes through the first damping hole (7), the second electromagnetism Suspension system is drained the oil in valve (91), the second damping hole (71), the realization of the 5th solenoid valve (94), the first damping hole (7) and second Damping hole (71) controls the speed of draining the oil of suspension system hydraulic oil.
- A kind of 2. suspension system of quasi- zero stiffness based on hydro pneumatic suspension according to claim 1, it is characterised in that：It is described Vertical Cylinders (4), two cross cylinders (5) small chamber and atmosphere.
- A kind of 3. suspension system of quasi- zero stiffness based on hydro pneumatic suspension according to claim 1, it is characterised in that：It is described Vertical Cylinders (4), the small chamber of two cross cylinders (5) connected by oil pipe with the big chamber of respective oil cylinder.
- A kind of 4. suspension system of quasi- zero stiffness based on hydro pneumatic suspension according to claim 1, it is characterised in that：Same In one vehicle bridge (2), the size chamber of vehicle bridge (2) left and right side Vertical Cylinders (4) does not connect, the big chamber of left vertical oil cylinder (4) and the right side The small chamber connection of side Vertical Cylinders (4), while left vertical oil cylinder (4) small chamber is connected with the big chamber of Right vertical oil cylinder (4).
- A kind of 5. suspension system of quasi- zero stiffness based on hydro pneumatic suspension according to claim 1, it is characterised in that：It is described Suspension system include a Vertical Cylinders (4) and two cross cylinders (5), two cross cylinders (5) Relative vertical oil cylinder (4) it is right Claim arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721478393.2U CN207360017U (en) | 2017-11-08 | 2017-11-08 | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721478393.2U CN207360017U (en) | 2017-11-08 | 2017-11-08 | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207360017U true CN207360017U (en) | 2018-05-15 |
Family
ID=62345792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721478393.2U Withdrawn - After Issue CN207360017U (en) | 2017-11-08 | 2017-11-08 | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207360017U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107672402A (en) * | 2017-11-08 | 2018-02-09 | 吉林大学 | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension |
-
2017
- 2017-11-08 CN CN201721478393.2U patent/CN207360017U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107672402A (en) * | 2017-11-08 | 2018-02-09 | 吉林大学 | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension |
| CN107672402B (en) * | 2017-11-08 | 2018-11-02 | 吉林大学 | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107672402B (en) | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension | |
| CN104903128B (en) | With passive and Active suspension of the energy using optimization | |
| CN104514834B (en) | Amortisseur | |
| CN107116985A (en) | A kind of big stroke suspension system for multi-axle heavy type vehicle | |
| CN207360017U (en) | The suspension system of quasi- zero stiffness based on hydro pneumatic suspension | |
| CN207360015U (en) | A kind of hydro-pneumatic suspension system of the quasi- zero stiffness in achievable equilbrium position | |
| CN107116986A (en) | A kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle | |
| CN112009193A (en) | Anti adjustable oil gas suspension hydraulic system that heels | |
| CN109515100A (en) | The control method of hydro-pneumatic suspension system, vehicle and hydro-pneumatic suspension system | |
| CN107696818A (en) | A kind of hydro-pneumatic suspension system of the quasi- zero stiffness in achievable equilbrium position | |
| CN109050192A (en) | Oleo-pneumatic suspension and Active Suspensions switching control circuit and hanging oil cylinder | |
| CN206344652U (en) | A kind of hydro-pneumatic suspension system of achievable active and half active switching control | |
| CN103879257B (en) | Suspension valve, hydro pneumatic suspension control system and engineering truck | |
| RU71298U1 (en) | HYDRO-PNEUMATIC SUSPENSION OF A VEHICLE | |
| CN207374053U (en) | The quasi- zero stiffness suspension system of integral axle | |
| CN207374052U (en) | A kind of quasi- zero stiffness hydro-pneumatic suspension system suitable for integral axle | |
| CN106394159A (en) | Vehicle suspension frame and vehicle | |
| CN107696819B (en) | The quasi- zero stiffness suspension system of integral axle | |
| CN103775554B (en) | The stepless adjustable hydro-pneumatic spring of double bolloon formula rigidity | |
| CN104691266A (en) | Hydro-pneumatic suspension control system for multi-axle vehicle chassis | |
| CN107672400B (en) | A kind of quasi- zero stiffness hydro-pneumatic suspension system suitable for integral axle | |
| CN203297179U (en) | Hydraulic interconnected suspension system | |
| CN206841113U (en) | Hydro pneumatic suspension bidirectional hydraulic blocking device | |
| CN211764774U (en) | Hydro-pneumatic suspension system and vehicle | |
| CN203655745U (en) | Hydro-pneumatic suspension hydraulic system and engineering vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180515 Effective date of abandoning: 20181102 |