CN215552401U - Oil gas suspension system - Google Patents
Oil gas suspension system Download PDFInfo
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- CN215552401U CN215552401U CN202121689654.1U CN202121689654U CN215552401U CN 215552401 U CN215552401 U CN 215552401U CN 202121689654 U CN202121689654 U CN 202121689654U CN 215552401 U CN215552401 U CN 215552401U
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- 239000000725 suspension Substances 0.000 title claims abstract description 33
- 238000013016 damping Methods 0.000 claims abstract description 66
- 238000007667 floating Methods 0.000 claims abstract description 25
- 230000006835 compression Effects 0.000 claims description 61
- 238000007906 compression Methods 0.000 claims description 61
- 238000004146 energy storage Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 40
- 239000007789 gas Substances 0.000 description 24
- 229910052757 nitrogen Inorganic materials 0.000 description 20
- 238000011084 recovery Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Abstract
The utility model discloses an oil-gas suspension system which comprises a first oil-gas spring, a second oil-gas spring and a first energy accumulator, wherein the first oil-gas spring and the second oil-gas spring are respectively arranged on a middle axle and a rear axle which are arranged on the same side of a vehicle, the interior of the first oil-gas spring is divided into a first rodless cavity and a first rod cavity by a first piston up and down, the interior of the second oil-gas spring is divided into a second rodless cavity and a second rod cavity by a second piston up and down, the first energy accumulator comprises a floating piston and an oil cavity and an air chamber which are formed by dividing the interior of the first oil-gas spring by the piston, the interior of the air chamber is filled with high-pressure gas, the first rodless cavity and the second rodless cavity are connected through a first communicating pipeline, and the second rodless cavity is connected with the oil cavity through a second communicating pipeline. The oil circuit of the oil-gas spring of the middle and rear axles on the same side can be communicated or closed, the oil circuit is communicated with the whole system to play a role in balancing and damping when the ball valve is opened, the middle and rear axles are balanced suspensions, the oil circuit is disconnected when the ball valve is closed, and the middle and rear axles become independent suspensions.
Description
Technical Field
The utility model relates to the technical field of chassis suspensions, in particular to an oil-gas suspension system of a commercial vehicle.
Background
In a commercial vehicle hydro-pneumatic suspension system, a hydro-pneumatic spring used by the existing vehicle is a single-energy-accumulator hydro-pneumatic suspension system which uses oil to transfer pressure and uses inert gas as an elastic medium, and is mostly used for a semitrailer and a trailer.
6 x 4 is the most common commercial vehicle model, and total 6 wheel positions are provided, the front axle is a steering axle, the two rear axles are driving axles, the rear 4 wheel positions are driven simultaneously, the driving force is large, and the driving mode is the mainstream driving mode of the tractor. Because the existing hydro-pneumatic suspension only adopts a single energy accumulator as an elastic element, when the load change is large, the shock absorption effect and the tire grounding property of the hydro-pneumatic suspension under a certain section of load are poor, and the hydro-pneumatic suspension cannot be used for a drive axle.
Therefore, it is necessary to develop a hydro-pneumatic suspension system which has a simple structure and is convenient to use, and is suitable for 6 × 4 type commercial vehicles to play a role in elastic vibration reduction under different loads.
Disclosure of Invention
The utility model aims to solve the defects of the background technology and provide the hydro-pneumatic suspension system which has a simple structure and is convenient to use and suitable for 6 x 4 type commercial vehicles to play a role in elastic vibration reduction under different loads.
The technical scheme of the utility model is as follows: an oil-gas suspension system is characterized by comprising a first oil-gas spring, a second oil-gas spring and a first energy accumulator, wherein the first oil-gas spring and the second oil-gas spring are respectively arranged on a middle axle and a rear axle on one side of a vehicle,
the first hydro-pneumatic spring comprises a first piston rod which enters the first hydro-pneumatic spring upwards and a first piston connected to the top end of the first piston rod, the inside of the first hydro-pneumatic spring is divided into a first rodless cavity and a first rod cavity by the first piston up and down,
the second hydro-pneumatic spring comprises a second piston rod which enters the second hydro-pneumatic spring upwards and a second piston connected to the top end of the second piston rod, the inside of the second hydro-pneumatic spring is divided into a second rodless cavity and a second rod cavity by the second piston up and down,
the first energy accumulator comprises a piston, an oil cavity and an air chamber, the oil cavity and the air chamber are formed by separating the piston, compressed air is filled in the air chamber, the first rodless cavity and the second rodless cavity are connected through a first communicating pipeline, a ball valve is arranged on the first communicating pipeline and used for controlling on-off, and the second rodless cavity is connected with the oil cavity through a second communicating pipeline.
Preferably, a first floating piston is arranged in the first piston rod, the first piston rod is internally divided into a first piston rod oil cavity and a first piston rod air chamber by the first floating piston from top to bottom, a first connecting hole is formed in the upper end of the first piston rod oil cavity and communicated with the first rod cavity, and compressed gas is filled in the first piston rod air chamber.
Furthermore, a first damping part communicated with the first rodless cavity and the first piston rod oil cavity is arranged in the first piston.
Furthermore, the first damping part comprises a first compression damping hole and a first compression check valve, the upper end of the first compression damping hole is communicated with the first rodless cavity, the lower end of the first compression damping hole is communicated with the inlet end of the first compression check valve, the outlet end of the first compression check valve is communicated with the first piston rod oil cavity, and the first compression check valve is used for limiting oil to flow from the first rodless cavity to the first piston rod oil cavity only.
Furthermore, the first damping part further comprises a first restoring damping hole and a first restoring one-way valve, the lower end of the first restoring damping hole is communicated with the first piston rod oil chamber, the upper end of the first restoring damping hole is communicated with the inlet end of the first restoring one-way valve, the outlet end of the first compression one-way valve is communicated with the first rodless chamber, and the first restoring one-way valve is used for limiting oil to only flow from the first piston rod oil chamber to the first rodless chamber.
Preferably, a second floating piston is arranged in the second piston rod, the second piston rod is internally divided into a second piston rod oil cavity and a second piston rod air chamber by the second floating piston up and down, a second communicating hole is formed in the upper end of the second piston rod oil cavity and communicated with the second rod cavity, and high-pressure gas is filled in the second piston rod air chamber.
Furthermore, a second damping part communicated with the second rodless cavity and the second piston rod oil cavity is arranged in the second piston.
Furthermore, the second damping part comprises a second compression damping hole and a second compression check valve, the upper end of the second compression damping hole is communicated with the second rodless cavity, the lower end of the second compression damping hole is communicated with the inlet end of the second compression check valve, the outlet end of the second compression check valve is communicated with the second piston rod oil cavity, and the second compression check valve is used for limiting oil to only flow from the second rodless cavity to the second piston rod oil cavity.
Furthermore, the second damping part further comprises a second restoring damping hole and a second restoring one-way valve, the lower end of the second restoring damping hole is communicated with the second piston rod oil chamber, the upper end of the second restoring damping hole is communicated with the inlet end of the second restoring one-way valve, the outlet end of the second compression one-way valve is communicated with the second rodless chamber, and the second restoring one-way valve is used for limiting oil to only flow from the second piston rod oil chamber to the second rodless chamber.
Furthermore, the first connecting holes are multiple and are arranged at intervals in the circumferential direction of the first piston rod oil cavity.
Preferably, still include third hydro-pneumatic spring, fourth hydro-pneumatic spring and second energy storage ware, third hydro-pneumatic spring, fourth hydro-pneumatic spring install respectively in the well axle and the rear axle of vehicle opposite side and third hydro-pneumatic spring, fourth hydro-pneumatic spring and second energy storage ware intercommunication.
The utility model has the beneficial effects that:
1. the high-low pressure double-accumulator oil-gas suspension system which can be used for 6 multiplied by 4 commercial vehicles and can play a role in elastic vibration reduction under different loads is composed of two oil-gas springs, an energy accumulator and a ball valve, a built-in energy accumulator (an energy accumulation structure in a piston rod) of each oil-gas spring is communicated with a rod cavity, a rodless cavity of each oil-gas spring is communicated with an external energy accumulator, the internal energy accumulator and the external energy accumulator can adopt different inflation pressures, the ball valve is communicated with the rodless cavities of the two oil-gas springs, and under different loads, the oil-gas springs have good vibration reduction function and tire grounding property, so that the vehicle is suitable for various road conditions, and the comfort and the off-road property of the vehicle are increased.
2. The oil circuit of the oil-gas spring of the middle and rear axles on the same side can be communicated or closed, the oil circuit is communicated with the whole system to play a role in balancing and damping when the ball valve is opened, the middle and rear axles are balanced suspensions, the oil circuit is disconnected when the ball valve is closed, and the middle and rear axles become independent suspensions.
3. The high-pressure air chamber and the low-pressure air chamber can be flexibly matched according to the actual load parameters of the vehicle, namely, the air chamber of the energy accumulator is filled with low-pressure nitrogen, the first piston rod air chamber and the second piston rod air chamber are filled with high-pressure nitrogen, or the air chamber of the energy accumulator is filled with high-pressure nitrogen, and the first piston rod air chamber and the second piston rod air chamber are filled with low-pressure nitrogen, so that different load requirements are met.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
Wherein: 1-first hydro-pneumatic spring 2-second hydro-pneumatic spring 3-first accumulator 4-first communicating pipe 5-second communicating pipe 6-ball valve 11-first piston 12-first piston rod (12.1-first piston rod oil chamber 12.2-first piston rod air chamber 12.3-first communicating hole)
13-first rodless cavity 14-first rod cavity 15-first floating piston 16-first compression damping hole 17-first compression check valve 18-first recovery damping hole 19-first recovery check valve 22-second piston rod (22.1-second piston rod oil cavity 22.2-second piston rod air chamber 22.3-second communication hole) 23-second rodless cavity 24-second rod cavity 25-second floating piston 26-second compression damping hole 27-second compression check valve 28-second recovery damping hole 29-second recovery check valve 31-piston 32-oil cavity 33-air chamber.
Detailed Description
The utility model is described in further detail below with reference to the figures and the specific embodiments.
As shown in figure 1, the utility model provides a commercial vehicle hydro-pneumatic suspension system which comprises a first hydro-pneumatic spring 1, a second hydro-pneumatic spring 2 and a first energy accumulator 3, wherein the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2 are respectively arranged on a middle axle and a rear axle which are arranged on the same side of a vehicle. In this embodiment, the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2 have the same structure.
The specific structure of first hydro-pneumatic spring 1 does: including getting into first hydro-pneumatic spring 1's first piston rod 12 and connecting in the first piston 11 on first piston rod 12 top up, first hydro-pneumatic spring 1 is inside to be separated into first no pole chamber 13 and first having pole chamber 14 from top to bottom by first piston 11, first piston rod 12 is inside to be equipped with first floating piston 15 and first piston rod 12 in to be separated into first piston rod oil pocket 12.1 from top to bottom by first floating piston 15, first piston rod air chamber 12.2, first piston rod oil pocket 12.1 upper end is equipped with first connecting hole 12.3 and first having pole chamber 14 intercommunication, first piston rod air chamber 12.2 is inside to be full of compressed gas. The first connecting holes 12.3 are multiple and are arranged at intervals in the circumferential direction of the first piston rod oil chamber 12.1.
A first damping part communicated with the first rodless cavity 13 and the first piston rod oil cavity 12.1 is arranged in the first piston 11, the first damping part comprises a first compression damping hole 16 and a first compression check valve 17, the upper end of the first compression damping hole 16 is communicated with the first rodless cavity 13, the lower end of the first compression damping hole is communicated with the inlet end of the first compression check valve 17, the outlet end of the first compression check valve 17 is communicated with the first piston rod oil cavity 12.1, and the first compression check valve 17 is used for limiting oil to only flow from the first rodless cavity 13 to the first piston rod oil cavity 12.1. The first damping part further comprises a first restoring damping hole 18 and a first restoring one-way valve 19, the lower end of the first restoring damping hole 18 is communicated with the first piston rod oil chamber 12.1, the upper end of the first restoring damping hole is communicated with the inlet end of the first restoring one-way valve 19, the outlet end of the first compression one-way valve 17 is communicated with the first rodless chamber 13, and the first restoring one-way valve 19 is used for limiting oil to only flow to the first rodless chamber 13 from the first piston rod oil chamber 12.1.
Similarly, the second hydro-pneumatic spring 2 has the specific structure that: including getting into second hydro-pneumatic spring 2's second piston rod 22 and connecting in the second piston 21 on second piston rod 22 top up, second hydro-pneumatic spring 2 is inside to be separated into second rodless chamber 23 and second by second piston 21 from top to bottom and has pole chamber 24, second piston rod 22 is inside to be equipped with second floating piston 25 and second piston rod 22 in separate into second piston rod oil chamber 22.1 from top to bottom by second floating piston 25, second piston rod air chamber 22.2, second piston rod oil chamber 22.1 upper end is equipped with second intercommunicating pore 22.3 and second has pole chamber 24 to communicate, second piston rod air chamber 22.2 is inside to be full of compressed gas. The second communication holes 22.3 are plural and are circumferentially spaced in the second-piston-rod oil chamber 22.1.
A second damping part communicated with the second rodless cavity 23 and the second piston rod oil cavity 22.1 is arranged in the second piston 21, the second damping part comprises a second compression damping hole 26 and a second compression check valve 27, the upper end of the second compression damping hole 26 is communicated with the second rodless cavity 23, the lower end of the second compression damping hole is communicated with the inlet end of the second compression check valve 27, the outlet of the second compression check valve 27 is communicated with the second piston rod oil cavity 22.1, the second compression check valve 27 is used for limiting oil to only flow from the second rodless cavity 23 to the second piston rod oil cavity 22.1, the second damping part further comprises a second restoration damping hole 28 and a second restoration check valve 29, the lower end of the second restoration damping hole 28 is communicated with the second piston rod oil cavity 22.1, the upper end of the second restoration check valve 29 is communicated with the inlet end of the second restoration check valve 27, the outlet of the second compression check valve 27 is communicated with the second rodless cavity 23, and the second restoration check valve 29 is used for limiting oil to only flow from the second piston rod oil cavity 22.1 to the second rodless cavity 23.
The first accumulator 3 has the following specific structure: including a piston 31, and an oil chamber 32 and a gas chamber 33 partitioned by the piston 31, the gas chamber 33 is filled with compressed gas.
The connection structure between the first hydro-pneumatic spring 1, the second hydro-pneumatic spring 2 and the first energy accumulator 3 is as follows: the first rodless cavity 13 and the second rodless cavity 23 are connected through a first communicating pipeline 4, a ball valve 6 is arranged on the first communicating pipeline 4 and used for controlling connection and disconnection, and the second rodless cavity 23 is connected with the oil cavity 32 through a second communicating pipeline 5.
In this embodiment, the first rodless chamber 13, the first rod chamber 14, the first piston rod oil chamber 12.1, the second rodless chamber 23, the second rod chamber 24, the second piston rod oil chamber 22.1, and the oil chamber 32 are filled with oil, and the oil can flow between the rodless chambers of the two hydro-pneumatic springs through the first communication pipe 4, and can also enter and exit the first accumulator 3 through the second communication pipe 5. The first piston rod air chamber 12.2, the second piston rod air chamber 22.2 and the air chamber 33 are filled with compressed nitrogen. The high-pressure air chamber and the low-pressure air chamber can be flexibly matched according to the actual load parameters of the vehicle, for example, the air chamber 33 of the first energy accumulator is charged with low-pressure nitrogen, the first piston rod air chamber 12.2 and the second piston rod air chamber 22.2 are charged with high-pressure nitrogen, or the air chamber 33 of the first energy accumulator is charged with high-pressure nitrogen, the first piston rod air chamber 12.2 and the second piston rod air chamber 22.2 are charged with low-pressure nitrogen (the scheme is adopted in the embodiment), so that different load requirements can be met.
The working principle of the hydro-pneumatic suspension system for balancing and damping in the embodiment is as follows:
when the oil-gas spring performs compression movement, the ball valve 6 is opened, the stress of the first piston rod 11 rises relative to the first oil-gas spring 1, the stress of the second piston rod 21 rises relative to the second oil-gas spring 2, oil in the first rodless cavity 13 and the second rodless cavity 23 is compressed, the first compression check valve 17 and the second compression check valve 27 are opened, the first recovery check valve 19 and the second recovery check valve 29 are closed, the oil in the first rodless cavity 13 enters the first piston rod oil cavity 12.1 and the first rod cavity 14 through the first compression damping hole 16 and the first compression check valve 17, and the oil in the second rodless cavity 23 enters the second piston rod oil cavity 22.1 and the second rod cavity 24 through the second compression damping hole 26 and the second compression check valve 27. The first compression damping hole 16 and the second compression damping hole 26 generate damping effect, and the compression damping function of the hydro-pneumatic spring is realized.
When the compression movement is carried out under low load, the internal pressure of the first piston rod oil chamber 12.1 and the internal pressure of the second piston rod oil chamber 22.1 are increased, the first floating piston 15 and the second floating piston 25 are descended, the load is continuously increased, and the first floating piston 15 and the second floating piston 25 are compressed to limit positions; when the load continues to increase to a large value, the oil in the first rodless chamber 13 and the second rodless chamber 23 enters the oil chamber 31 of the first accumulator 3 through the first communicating pipe 4 and the second communicating pipe 5, the pressure in the oil chamber 31 increases, and when the pressure reaches a certain value, the pressure in the oil chamber 32 of the first accumulator 3 pushes the piston 31 to move towards the air chamber 33 (towards the right in fig. 1), so that the high-pressure nitrogen in the air chamber 15 is compressed.
When the hydro-pneumatic spring performs restoring motion, the ball valve 6 is opened, the stress of the first piston rod 11 is reduced relative to the first hydro-pneumatic spring 1, the stress of the second piston rod 21 is reduced relative to the second hydro-pneumatic spring 2, the oil in the first rod cavity 14 and the second rod cavity 24 is compressed, the first restoring one-way valve 19 and the second restoring one-way valve 29 are opened, the first compressing one-way valve 17 and the second compressing one-way valve 27 are closed, the oil in the first piston rod oil cavity 12.1 and the first rod cavity 14 passes through the first restoring damping hole 18 and the first restoring one-way valve 19 and enters the first rodless cavity 13, and the oil in the second piston rod oil cavity 22.1 and the second rod cavity 24 passes through the second restoring damping hole 28 and the second restoring one-way valve 29 and enters the second rodless cavity 23. The first restoring damping hole 18 and the second restoring damping hole 28 generate damping effect, and the restoring vibration damping function of the hydro-pneumatic spring is realized.
In the restoring motion, when the load is high, the nitrogen pressure in the first piston rod air chamber 12.2 is not enough to push the nitrogen pressure in the first floating piston 15 and the second piston rod air chamber 22.2 to push the second floating piston 25, the first floating piston 15 and the second floating piston 25 are at the lowest position, the pressure in the oil chamber 32 of the first accumulator 3 is reduced, the high-pressure nitrogen in the air chamber 33 pushes the piston 31 to move towards the oil chamber 32 (towards the left in fig. 1), and the oil in the oil chamber 32 flows to the first rodless chamber 13 and the second rodless chamber 23; when the load is reduced, the pressure in the first rod chamber 14, the first piston rod oil chamber 12.1, the second rod chamber 24 and the second piston rod oil chamber 22.1 is reduced, the nitrogen in the first piston rod air chamber 12.2 pushes the first floating piston 15 to rise, and the nitrogen in the second piston rod air chamber 22.2 pushes the second floating piston 25 to rise.
During the running process of the vehicle, the vehicle is impacted by an uneven road surface:
when the load is low, the first piston rod 12 and the second piston rod 22 move up and down, the impact force is respectively transmitted to the first piston 11 and the second piston 21, nitrogen in the first piston rod air chamber 12.2 and the second piston rod air chamber 22.2 is continuously compressed or expanded, and the impact force caused by an uneven road surface is absorbed; when the load is high, the first piston rod 12 and the second piston rod 22 move up and down, nitrogen in the first piston rod air chamber 12.2 and the second piston rod air chamber 22.2 is in a compressed limit state due to low pressure, and the impact force is transmitted to the piston 31 in the first energy accumulator 3, so that the nitrogen in the air chamber 33 is compressed or expanded continuously, and the impact force caused by an uneven road surface is absorbed; the low pressure nitrogen in the first and second piston rod chambers 12.2, 2.2 and the high pressure nitrogen in chamber 33 act as springs at low and high loads, respectively.
In the embodiment, the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2 are respectively arranged on the same sides (left side or right side) of a second bridge and a third bridge of a 6 x 4 vehicle, if the ball valve 6 is opened, the first rodless cavity 13 of the first hydro-pneumatic spring 1 is communicated with the second rodless cavity 23 of the second hydro-pneumatic spring 2, and the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2 jointly form a balance suspension to play a balance function on the same sides of the second bridge and the third bridge; if the ball valve 13 is closed, the first rodless cavity 13 of the first hydro-pneumatic spring 1 and the second rodless cavity 23 of the second hydro-pneumatic spring 2 are disconnected, and the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2 are independent suspensions respectively.
The hydro-pneumatic suspension system of this embodiment still includes the third hydro-pneumatic spring, fourth hydro-pneumatic spring and second energy storage ware, the second bridge of 6 x 4 car, the third hydro-pneumatic spring is adorned with the fourth hydro-pneumatic spring, three bridge opposite sides, the third hydro-pneumatic spring, fourth hydro-pneumatic spring and second energy storage ware structure respectively with first hydro-pneumatic spring 1, the second hydro-pneumatic spring 2, first energy storage ware 3 structure is the same, connection structure is the same with first hydro-pneumatic spring 1 between third hydro-pneumatic spring, fourth hydro-pneumatic spring and the second energy storage ware, second hydro-pneumatic spring 2, connection structure is the same between first energy storage ware 3.
Claims (10)
1. An oil-gas suspension system is characterized by comprising a first oil-gas spring (1), a second oil-gas spring (2) and a first energy accumulator (3), wherein the first oil-gas spring (1) and the second oil-gas spring (2) are respectively arranged on a middle axle and a rear axle on one side of a vehicle,
the first hydro-pneumatic spring (1) comprises a first piston rod (12) which enters the first hydro-pneumatic spring (1) upwards and a first piston (11) connected to the top end of the first piston rod (12), the interior of the first hydro-pneumatic spring (1) is divided into a first rodless cavity (13) and a first rod cavity (14) by the first piston (11) from top to bottom,
the second hydro-pneumatic spring (2) comprises a second piston rod (22) which enters the second hydro-pneumatic spring (2) upwards and a second piston (21) connected to the top end of the second piston rod (22), the inside of the second hydro-pneumatic spring (2) is divided into a second rodless cavity (23) and a second rod cavity (24) by the second piston (21) up and down,
first energy storage ware (3) are including piston (31) and oil pocket (32) and air chamber (33) of separating the formation by piston (31), air chamber (33) are inside to be full of compressed gas, connect through first intercommunication pipeline (4) between first rodless chamber (13), second rodless chamber (23), be equipped with ball valve (6) on first intercommunication pipeline (4) and be used for controlling the break-make, be connected through second intercommunication pipeline (5) between second rodless chamber (23) and oil pocket (32).
2. The hydro-pneumatic suspension system as claimed in claim 1, wherein a first floating piston (15) is arranged inside the first piston rod (12), the first piston rod (12) is vertically divided into a first piston rod oil chamber (12.1) and a first piston rod air chamber (12.2) by the first floating piston (15), a first communication hole (12.3) is formed in the upper end of the first piston rod oil chamber (12.1) and communicated with the first rod chamber (14), and the first piston rod air chamber (12.2) is filled with compressed gas.
3. The hydro-pneumatic suspension system as claimed in claim 2, wherein a first damping member is provided in the first piston (11) communicating the first rod chamber (13) and the first piston rod oil chamber (12.1).
4. The hydro-pneumatic suspension system as defined in claim 3 wherein the first damping member includes a first compression damping orifice (16) and a first compression check valve (17), the first compression damping orifice (16) communicating at an upper end with the first rod chamber (13) and at a lower end with an inlet end of the first compression check valve (17), an outlet end of the first compression check valve (17) opening into the first piston rod oil chamber (12.1) and the first compression check valve (17) for restricting oil flow from the first rod chamber (13) to the first piston rod oil chamber (12.1) only.
5. The hydro-pneumatic suspension system as defined in claim 4 wherein the first damping member further includes a first rebound orifice (18) and a first rebound check valve (19), the first rebound orifice (18) communicating at a lower end with the first piston rod oil chamber (12.1) and at an upper end with an inlet end of the first rebound check valve (19), the first compression check valve (17) having an outlet end opening into the first rod chamber (13) and the first rebound check valve (19) for restricting oil flow from the first piston rod oil chamber (12.1) only to the first rod chamber (13).
6. The hydro-pneumatic suspension system as claimed in claim 1, wherein a second floating piston (25) is arranged in the second piston rod (22), the interior of the second piston rod (22) is vertically divided into a second piston rod oil chamber (22.1) and a second piston rod air chamber (22.2) by the second floating piston (25), a second communication hole (22.3) is formed in the upper end of the second piston rod oil chamber (22.1) and communicated with the second rod chamber (24), and the interior of the second piston rod air chamber (22.2) is filled with high-pressure gas.
7. The hydro-pneumatic suspension system as claimed in claim 6, wherein a second damping member is provided in the second piston (21) communicating the second rodless chamber (23) and the second piston rod oil chamber (22.1).
8. The hydro-pneumatic suspension system as defined in claim 7 wherein the second damping member includes a second compression damping orifice (26) and a second compression check valve (27), the second compression damping orifice (26) communicating at an upper end with the second rodless chamber (23) and at a lower end with an inlet end of the second compression check valve (27), an outlet end of the second compression check valve (27) opening into the second piston rod oil chamber (22.1) and the second compression check valve (27) for restricting oil flow only from the second rodless chamber (23) to the second piston rod oil chamber (22.1).
9. The hydro-pneumatic suspension system as defined in claim 8 wherein the second damping member further includes a second rebound damping orifice (28) and a second rebound check valve (29), the second rebound damping orifice (28) communicating at a lower end with the second piston rod oil chamber (22.1) and at an upper end with an inlet end of the second rebound check valve (29), the second compression check valve (27) outlet end opening into the second rodless chamber (23) and the second rebound check valve (29) for restricting oil flow from the second piston rod oil chamber (22.1) only to the second rodless chamber (23).
10. The hydro-pneumatic suspension system of claim 1, further comprising a third hydro-pneumatic spring, a fourth hydro-pneumatic spring, and a second accumulator, the third hydro-pneumatic spring and the fourth hydro-pneumatic spring being mounted to the middle axle and the rear axle on the other side of the vehicle, respectively, and the third hydro-pneumatic spring and the fourth hydro-pneumatic spring being in communication with the second accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121689654.1U CN215552401U (en) | 2021-07-23 | 2021-07-23 | Oil gas suspension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121689654.1U CN215552401U (en) | 2021-07-23 | 2021-07-23 | Oil gas suspension system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215552401U true CN215552401U (en) | 2022-01-18 |
Family
ID=79828023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121689654.1U Active CN215552401U (en) | 2021-07-23 | 2021-07-23 | Oil gas suspension system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215552401U (en) |
-
2021
- 2021-07-23 CN CN202121689654.1U patent/CN215552401U/en active Active
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| GR01 | Patent grant | ||
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Hydropneumatic Suspension System Granted publication date: 20220118 Pledgee: Agricultural Bank of China Limited Shiyan Yunyang Branch Pledgor: DONGFENG SPECIAL PARTS Co.,Ltd. Registration number: Y2024980005588 |