CN213007477U

CN213007477U - Multifunctional liquid-gas suspension device

Info

Publication number: CN213007477U
Application number: CN202022200599.7U
Authority: CN
Inventors: 刘正
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-04-20
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a multifunctional hydro-pneumatic suspension device, which comprises a hydro-pneumatic suspension control system assembly and two shock absorber assemblies which are used in a matched way. The two shock absorber assemblies are similar in overall structure, have an elastic supporting function, a progressive damping function, a limiting bottom-touching prevention function and a maximum stroke limiting function, and can be used independently or matched with a liquid-gas suspension control system assembly. The hydraulic-pneumatic suspension control system assembly can form a multifunctional hydraulic-pneumatic suspension device with any one of two shock absorber assemblies, and can realize multiple automatic adjustment functions while having the elastic support function, the progressive damping function, the limiting anti-bottoming function and the maximum stroke limiting function of the shock absorber assemblies.

Description

Multifunctional liquid-gas suspension device

Technical Field

The utility model belongs to the vehicle field, in particular to multi-functional liquid gas linkage

Background

At present, the modes of realizing the effects of elastic support and damping shock absorption between a vehicle suspension system and a vehicle body are mainly three, specifically as follows:

the first method comprises the following steps: the metal spring is used in conjunction with the shock absorber, and such combination provides the elastic supporting force by the spring, and the shock absorber provides the damping force, which is the most common at present. The disadvantage is that it does not have a height adjustment function.

And the second method comprises the following steps: air suspensions, which are resiliently supported by compressed gas within an air bag, are required for use with shock absorbers. The defects are that the adjusting function is single, the air bag is easy to age and the service life is short.

And the third is that: the liquid-gas suspension uses gas as elastic medium and liquid as force-transferring medium. The damping device has the advantages that the damping device has better damping effect, and can achieve good damping effect without additionally arranging a shock absorber outside a liquid-gas suspension system, and has better buffering effect; the disadvantage is the single adjustment function.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a multi-functional liquid gas linkage removes when having the advantage that traditional liquid gas hung, still possesses following advantage:

1) the regulation function is more comprehensive, and the regulation of the liquid amount in the upper pressure oil gas tank, the oil-gas proportion in the lower pressure oil gas tank and the inert gas pressure in the lower pressure oil gas tank are realized;

2) the damping effect is more excellent, and the damping force of the shock absorber can be gradually increased along with the increase of the compression stroke in the compression process, so that the shock absorber has a better dynamic stability effect;

3) shock absorber with upward stroke limiting function

When the shock absorber is compressed to the end of the upward stroke, the resistance will increase greatly, preventing the shock absorber from bottom-touching damage.

The technical scheme of the utility model is realized like this:

a multifunctional hydro-pneumatic suspension device comprises a hydro-pneumatic suspension control system assembly and a shock absorber assembly;

the hydraulic-pneumatic suspension control system assembly comprises a main controller, a low-pressure air tank, an air pump, a high-pressure air tank, an oil storage can, an oil pump, a high-pressure oil tank, a first electromagnetic air valve, a second electromagnetic air valve, a first electromagnetic oil valve, a second electromagnetic oil valve, an oil level sensor, a pressure sensor and a vehicle body height sensor;

the shock absorber assembly comprises a cylinder body, an upper cover, a lower cover, a piston connecting rod assembly, an upper pressure oil gas tank and a lower pressure oil gas tank; the piston of the piston connecting rod assembly divides the cylinder body into an upper oil chamber and a lower oil chamber; the upper oil chamber is communicated with the upper pressure oil gas tank through an upper oil pipe, and the lower oil chamber is communicated with the lower pressure oil gas tank through a lower oil pipe;

the air pump is respectively communicated with the low-pressure air tank and the high-pressure air tank, the high-pressure air tank is communicated with the top of the upper-pressure oil gas tank through a first high-pressure air pipe, and the low-pressure air tank is communicated with the top of the lower-pressure oil gas tank through a second high-pressure air pipe; the first high-pressure air pipe and the second high-pressure air pipe are both provided with a first electromagnetic air valve;

a first high-pressure air pipe between the first electromagnetic air valve and the upper pressure oil-air tank is communicated with the low-pressure air tank through a first return air pipe; a second high-pressure air pipe between the first electromagnetic air valve and the lower pressure oil-air tank is communicated with the low-pressure air tank through a second return air pipe; the first return air pipe and the second return air pipe are both provided with a second electromagnetic air valve;

the oil pump is respectively communicated with the high-pressure oil gas tank and the oil storage pot, the high-pressure oil gas tank is communicated with the upper oil chamber through a first high-pressure oil pipe, and is communicated with the lower oil chamber through a second high-pressure oil pipe; the first high-pressure oil pipe and the second high-pressure oil pipe are both provided with a first electromagnetic oil valve;

a first high-pressure oil pipe between the first electromagnetic oil valve and the upper pressure oil gas tank is communicated with the top of the oil storage pot through a first return oil pipe, and a second high-pressure oil pipe between the first electromagnetic oil valve and the lower pressure oil gas tank is communicated with the bottom of the oil storage pot through a second return oil pipe; the first return oil pipe and the second return oil pipe are both provided with a second electromagnetic oil valve;

the high-pressure gas tank is communicated with the top of the high-pressure oil gas tank through a third high-pressure gas pipe;

oil level sensors are arranged in the upper pressure oil-gas tank, the lower pressure oil-gas tank and the oil storage pot; pressure sensors are arranged in the low-pressure gas tank, the high-pressure gas tank, the upper pressure oil gas tank, the lower pressure oil gas tank and the high-pressure oil gas tank, and the main controller is connected with the pressure sensors through signal lines;

the main controller is in signal connection with the oil level sensor and is respectively connected with the first electromagnetic air valve, the second electromagnetic air valve, the first electromagnetic oil valve, the second electromagnetic oil valve, the air pump and the oil pump through control lines.

Furthermore, the upper cover comprises a first cover top and a first neck part arranged at the bottom of the first cover top, and the upper part of the cylinder body extends into the first neck part and is in threaded connection with the first neck part; a first upper oil duct communicated with the upper pressure oil-gas tank is arranged in the first cover top, an annular cone structure shallow groove is arranged at the bottom of the first upper oil duct, the upper part of the annular cone structure shallow groove is communicated with the first upper oil duct, and the lower part of the annular cone structure shallow groove is communicated with the upper oil chamber;

one end of the oil feeding pipe is communicated with the first oil feeding channel, and the other end of the oil feeding pipe is communicated with the upper pressure oil gas tank; the first cover top is provided with a first hole hinged with the vehicle body;

the lower cover comprises a first cover bottom and a second neck arranged at the top of the first cover bottom, and the lower part of the cylinder body extends into the second neck and is in threaded connection with the second neck; a circular hole is formed in the center of the bottom of the first cover bottom, a first sealing ring is arranged in the circular hole, a first lower oil duct is arranged in the first cover top, and the first lower oil duct is communicated with the lower oil chamber; one end of the first lower oil pipe is communicated with the first lower oil duct, and the other end of the first lower oil pipe is communicated with the lower pressure oil gas tank;

two first one-way oil valves in opposite directions are arranged in the first upper oil duct and the first lower oil duct;

the piston connecting rod assembly comprises a first piston and a first connecting rod arranged at the bottom of the first piston, a first deep groove penetrating through the first piston and extending into the first connecting rod is arranged in the piston connecting rod assembly, a second annular oil seal is arranged on the inner wall of the first deep groove, and a first annular oil seal is arranged on the outer side of the first piston; a spring and a sliding oil plug are arranged in the first deep groove, the spring is arranged at the bottom of the sliding oil plug, one end of the spring is abutted against the bottom of the first deep groove, and the other end of the spring is abutted against the bottom of the sliding oil plug; the other end of the sliding oil plug extends out of the first deep groove and extends to the position above the first piston; the top of the sliding oil plug is of an annular cone structure, and the center of the sliding oil plug is provided with a third through hole which is communicated up and down; the middle part of the sliding oil plug is provided with a plurality of first small holes, the outer diameter of the sliding oil plug is matched with the inner diameter of the first deep groove, and the sliding oil plug can slide up and down in the first deep groove; the bottom of the first connecting rod is provided with a first lower connecting piece, a first screw on the upper portion of the first lower connecting piece is in threaded connection with a screw hole in the bottom of the first connecting rod, and the bottom of the lower connecting piece is provided with a second through hole hinged to a vehicle suspension.

Further, the upper cover comprises a second cover top and a third neck arranged at the bottom of the second cover top, and the cylinder body is arranged in the inner wall of the third neck and is in threaded connection with the third neck; a second upper oil duct is arranged in the second cover top, a central metal pipe is arranged at the bottom of the second upper oil duct, and the central metal pipe is communicated with the second upper oil duct; the pipe wall of the central metal pipe is provided with a plurality of second small holes; one end of the oil feeding pipe is communicated with the second oil feeding channel, and the other end of the oil feeding pipe is communicated with the upper pressure oil gas tank; the second cover top is provided with a third hole hinged with the vehicle body;

the lower cover comprises a second cover bottom and a fourth neck arranged at the top of the second cover bottom, the inner side of the fourth neck is provided with internal threads, and the lower part of the cylinder body extends into the fourth neck and is in threaded connection with the fourth neck; a round hole is formed in the center of the bottom of the first cover bottom, a second sealing ring is arranged in the round hole, a second lower oil duct is arranged in the second cover bottom, and the second lower oil duct is communicated with the lower oil chamber; one end of the lower oil pipe is communicated with the second lower oil duct, and the other end of the lower oil pipe is communicated with the lower pressure oil gas tank;

two second one-way oil valves in opposite directions are arranged in the second upper oil duct and the second lower oil duct;

the piston connecting rod assembly comprises a second piston and a second connecting rod arranged at the bottom of the second piston, a second deep groove penetrating through the second piston and extending into the second connecting rod is arranged in the piston connecting rod assembly, a fourth annular oil seal is arranged on the inner wall of the second deep groove, and a third annular oil seal is arranged on the outer side of the second piston; a second lower connecting piece is arranged at the bottom of the second connecting rod, a second screw at the upper part of the second lower connecting piece is in threaded connection with a screw hole at the bottom of the second connecting rod, and a fourth hole hinged with the vehicle suspension is arranged at the bottom of the second lower connecting piece; the outer diameter of the central metal tube matches the inner diameter of the second deep groove in which the central metal tube can slide.

The utility model provides a multi-functional liquid gas linkage has following advantage:

1) high automation degree

Through gathering a plurality of pressure sensor, oil level sensor, automobile body height sensor's information, when gathering numerical value and main control unit settlement numerical value and not agreeing with, opening of automatic control solenoid valve is closed, makes gather data and settlement numerical value keep unanimous in-service use when needs change the suspension system parameter, only needs input new numerical value, and main control unit alright automatic adjustment of making.

2) The adjusting function is comprehensive, and the device has the functions of adjusting the liquid amount of the upper oil chamber, adjusting the liquid-gas ratio of the upper pressure oil-gas tank, adjusting the liquid-gas ratio of the lower pressure oil-gas tank and adjusting the inert gas pressure of the lower pressure oil-gas tank.

3) Long service life

The liquid-gas suspension control system assembly uses a closed-cycle gas path system, and inert gas is used as an elastic medium. Compared with an open type gas path system, the gas path system can effectively prevent moisture impurities from entering the gas path and polluting liquid. And the use of inert gas can effectively slow down the oxidation speed of liquid and internal parts, thereby prolonging the service life.

4) The damping effect is more excellent

The damping force of the shock absorber in the compression process can be gradually increased along with the increase of the compression stroke, so that the shock absorber has a better dynamic stability effect.

5) Shock absorber with upward stroke limiting function

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a multifunctional hydro-pneumatic suspension device of the present invention;

FIG. 2 is a schematic structural view of the shock absorber assembly 1;

FIG. 3 is an enlarged view of A-A in FIG. 2;

FIG. 4 is a schematic structural view of the shock absorber assembly 2;

fig. 5 is an enlarged view of B-B in fig. 4.

In the figure:

1. a shock absorber; 2. an upper pressure oil-gas tank; 3. a lower pressure tank; 4. a low pressure gas tank; 5. an air pump; 6. A high pressure gas tank; 7. a high pressure oil tank; 8. an oil pump; 9. an oil storage pot; 10. a barrel body; 11. a first link; 12. a first piston; 13. an upper oil chamber; 14. a lower oil chamber; 15. a first one-way oil valve; 16. an upper cover; 17. A lower cover; 18. a first upper oil gallery; 19. a first lower oil gallery; 20. a first lower connecting member; 21. a second lower connecting member; 22. a first return air pipe; 23. a second return gas pipe; 24. a first high-pressure air pipe; 25. A second high-pressure air pipe; 26. a third high-pressure air pipe; 27. a first electromagnetic air valve; 28. a second electromagnetic air valve; 29. feeding an oil pipe; 30. discharging an oil pipe; 31. a first high pressure fuel line; 32. a second high pressure fuel line; 33. a first return line; 34. a second return line; 35. a first electromagnetic oil valve; 36. a second electromagnetic oil valve; 37. An oil level sensor; 38. a pressure sensor; 39. a main controller; 40. a signal line; 41. a control line; 42. A first cover top; 43. a first neck portion; 44. a first cover bottom; 45. a second neck portion; 46. a first hole; 47. A spring; 48. a first seal ring; 49. a first deep trench; 50. a first annular oil seal; 51. a second annular oil seal; 52. an annular cone structure; 53. a ring cone structure shallow groove; 54. a third through hole; 55. a first aperture; 56. a second hole; 57. a second link; 58. a second piston; 59. a second one-way oil valve; 60. a second upper oil gallery; 61. a second lower oil gallery; 62. a second cover top; 63. a third neck portion; 64. a second cover bottom; 65. A fourth neck portion; 66. a third hole; 67. a central metal tube; 68. a second seal ring; 69. a second deep groove; 70. a third annular oil seal; 71. a fourth annular oil seal; 72. a fourth hole; 73. a second aperture; 74. A body height sensor; 75. sliding oil blocking; 76. a piston and connecting rod assembly.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.

With reference to fig. 1-5, the present invention provides a multi-functional hydro-pneumatic suspension device, which comprises a hydro-pneumatic suspension control system assembly and a shock absorber assembly;

the hydro-pneumatic suspension control system assembly comprises a main controller 39, a low-pressure air tank 4, an air pump 5, a high-pressure air tank 6, an oil storage pot 9, an oil pump 8, a high-pressure oil-gas tank 7, a first electromagnetic air valve 27, a second electromagnetic air valve 28, a first electromagnetic oil valve 35, a second electromagnetic oil valve 36, an oil level sensor 37, a pressure sensor 38 and a vehicle body height sensor 74;

the shock absorber assembly comprises a cylinder body 10, an upper cover 16, a lower cover 17, a piston connecting rod assembly 76, an upper pressure oil gas tank 2 and a lower pressure oil gas tank 3; the piston of the piston connecting rod assembly 76 divides the cylinder body 10 into an upper oil chamber 13 and a lower oil chamber 14; the upper oil chamber 13 is communicated with the upper pressure oil gas tank 2 through an upper oil pipe 29, and the lower oil chamber 14 is communicated with the lower pressure oil gas tank 3 through a lower oil pipe 30;

the air pump 5 is respectively communicated with the low-pressure air tank 4 and the high-pressure air tank 6, the high-pressure air tank 6 is communicated with the top of the upper-pressure oil air tank 2 through a first high-pressure air pipe 24, and the high-pressure air tank 6 is communicated with the top of the lower-pressure oil air tank 3 through a second high-pressure air pipe 25; the first high-pressure air pipe 24 and the second high-pressure air pipe 25 are both provided with a first electromagnetic air valve 27;

the first high-pressure air pipe 24 between the first electromagnetic air valve 27 and the upper pressure oil-gas tank 2 is communicated with the low-pressure gas tank 4 through the first return air pipe 22; the second high-pressure air pipe 25 between the first electromagnetic air valve 27 and the lower pressure oil-gas tank 3 is communicated with the low-pressure gas tank 4 through a second return air pipe 23; the first return air pipe 22 and the second return air pipe 23 are both provided with a second electromagnetic air valve 28;

the oil pump 8 is respectively communicated with the high-pressure oil gas tank 7 and the oil storage pot 9, the high-pressure oil gas tank 7 is communicated with the upper oil chamber 13 through a first high-pressure oil pipe 31, and the high-pressure oil gas tank 7 is communicated with the lower oil chamber 14 through a second high-pressure oil pipe 32; the first high-pressure oil pipe 31 and the second high-pressure oil pipe 32 are both provided with a first electromagnetic oil valve 35;

a first high-pressure oil pipe 31 between the first electromagnetic oil valve 35 and the upper pressure oil tank 2 is communicated with the top of the oil storage pot 9 through a first return oil pipe 33, and a second high-pressure oil pipe 32 between the first electromagnetic oil valve 35 and the lower pressure oil tank 3 is communicated with the bottom of the oil storage pot 9 through a second return oil pipe 34; the first return oil pipe 33 and the second return oil pipe 34 are both provided with a second electromagnetic oil valve 36;

the top of the high-pressure gas tank 6 is communicated with the top of the high-pressure oil gas tank 7 through a third high-pressure gas pipe 26;

oil level sensors 37 are arranged in the upper pressure oil-gas tank 2, the lower pressure oil-gas tank 3 and the oil storage pot 9; pressure sensors 38 are arranged in the low-pressure gas tank 4, the high-pressure gas tank 6, the upper-pressure gas tank 2, the lower-pressure gas tank 3 and the high-pressure gas tank 7;

the main controller 39 is connected to the oil level sensor 37, the vehicle height sensor 74, and the pressure sensor 38 via signal lines 40, and is connected to the first solenoid air valve 27, the second solenoid air valve 28, the first solenoid oil valve 35, the second solenoid oil valve 36, the air pump 5, and the oil pump 8 via control lines 41, respectively.

It should be noted that the media in the upper oil chamber 13 and the lower oil chamber 14 in the barrel 10 are liquid, the media in the upper oil pipe 29 and the lower oil pipe 30 are liquid, the media in the upper pressure oil gas tank 2 and the lower pressure oil gas tank 3 are inert gas and liquid (because of the influence of gravity, the liquid is below, the inert gas is above), and the media in the high pressure oil gas tank 7 are medium liquid in the first high pressure oil pipe 31 and the second high pressure oil pipe 32 which are communicated with the inert gas and liquid (because of the influence of gravity, the liquid is below, the inert gas is above).

The pressure sensor 38 is used to monitor the pressure of each of the above-described gas tanks. Wherein the high-pressure gas tank 6 is communicated with the high-pressure oil gas tank 7 through a third high-pressure gas pipe 26, and because an electromagnetic gas valve is not arranged, the pressure in the high-pressure gas tank 6 is consistent with that in the high-pressure oil gas tank 7.

Further, referring to fig. 2, the upper cap 16 includes a first cap top 42 and a first neck 43 disposed at the bottom of the first cap top 42, and the upper portion of the barrel 10 extends into the first neck 43 and is screwed; the first cover top 42 is internally provided with a first upper oil duct 18 communicated with the upper pressure oil gas tank 2, the bottom of the first upper oil duct 18 is provided with an annular cone structure shallow groove 53, the upper part of the annular cone structure shallow groove 53 is communicated with the first upper oil duct 18, and the lower part of the annular cone structure shallow groove 53 is communicated with the upper oil chamber 13; one end of the upper oil pipe 29 is communicated with the first upper oil passage 18, and the other end is communicated with the upper pressure oil gas tank 2; the first cover top 42 is provided with a first hole 46 hinged with the vehicle body; the lower cover 17 comprises a first cover bottom 44 and a second neck portion 45 arranged at the top of the first cover bottom 44, and the lower part of the cylinder body 10 extends into the second neck portion 45 and is in threaded connection; a first circular hole is formed in the center of the bottom of the first cover bottom 44, a first sealing ring 48 is arranged in the first circular hole, a first lower oil duct 19 is arranged in the first cover top 42, and the first lower oil duct 19 is communicated with the lower oil chamber 14; one end of the first lower oil pipe 30 is communicated with the first lower oil duct 19, and the other end is communicated with the lower pressure oil gas tank 3; two first one-way oil valves 15 in opposite directions are arranged in the first upper oil passage 18 and the first lower oil passage 19; the piston connecting rod assembly 76 comprises a first piston 12 and a first connecting rod 11 arranged at the bottom of the first piston 12, a first deep groove 49 penetrating through the first piston 12 and extending into the first connecting rod 11 is arranged in the piston connecting rod assembly 76, a second annular oil seal 51 is arranged on the inner wall of the first deep groove 49, and a first annular oil seal 50 is arranged on the outer side of the first piston 12; a spring 47 and a sliding oil plug 75 are arranged in the first deep groove 49, the spring 47 is arranged at the bottom of the sliding oil plug 75, one end of the spring 47 is abutted against the bottom of the first deep groove 49, and the other end of the spring 47 is abutted against the bottom of the sliding oil plug 75; the other end of the sliding oil plug 75 extends out of the first deep groove 49 and extends to the upper part of the first piston 12; the top of the sliding oil plug 75 is an annular cone structure 52, and the center of the sliding oil plug 75 is provided with a third through hole 54 which is communicated up and down; the middle part of the sliding oil plug 75 is provided with a plurality of first small holes 55, the outer diameter of the sliding oil plug 75 is matched with the inner diameter of the first deep groove 49, and the sliding oil plug can slide up and down in the first deep groove 49; the bottom of the first connecting rod 11 is provided with a first lower connecting piece 20, a first screw rod at the upper part of the first lower connecting piece 20 is in threaded connection with a screw hole at the bottom of the first connecting rod 11, and the bottom of the first lower connecting piece 20 is provided with a second hole 56 hinged with a vehicle suspension.

The shock absorber assembly 1 has the following functions and advantages:

the functions are as follows: the hydraulic suspension control system has the advantages of having an elastic supporting function, a damping function, a limiting bottom-touching prevention function and a maximum stroke limiting function, being capable of being used independently, being matched with a hydraulic suspension control system assembly, and having multiple adjusting functions when being matched with the hydraulic suspension control system assembly.

The advantages are that: the compression stroke and the rebound stroke have two-stage stroke damping effect, and the second-stage stroke has progressive damping effect.

The working principle of the shock absorber assembly 1 is as follows:

1) working principle of compression stroke

During compression, the upper oil chamber 13 operates simultaneously with the lower oil chamber 14.

Wherein, working principle of oil feeding chamber 13 in compression stroke

The shock absorber assembly 1 is elastically supported by the inert gas inside, force is transferred through the liquid and then transferred to the vehicle suspension hinged with the shock absorber assembly through the piston connecting rod assembly 76, the first lower connecting member 20, the second hole 56 and the like, and finally the vehicle is elastically supported. When a vehicle encounters a raised obstacle during travel, the tire is subjected to an upward impact force. The impact force moves simultaneously upward via the tire, vehicle suspension, piston link assembly 76. When the piston connecting rod assembly 76 moves upward, the pressure in the upper oil chamber 13 increases, and the liquid in the upper oil chamber 13 flows into the upper pressure oil tank 2 through the tapered ring structure shallow groove 53, the first upper oil passage 18, the first one-way oil valve 15 and the upper oil pipe 29. (since the first one-way oil valve 15 can limit the flow rate, and the resistance increases to generate damping force when the liquid passes through the first one-way oil valve 15), after the piston connecting rod assembly 76 moves upward for a certain distance, the conical surface of the annular cone structure 52 on the upper part of the sliding oil plug 75 is tightly attached to the annular cone structure shallow groove 53. The above is the first stage of the compression stroke of the upper oil chamber 13.

The piston and connecting rod assembly 76 continues to move upward and the sliding oil dam 75 is forced to slide into the first deep groove 49 and compress the spring 47. Because the conical surface of the annular cone structure 52 on the upper part of the sliding oil plug 75 is tightly attached to the annular cone structure shallow groove 53, liquid can only flow into the main oil gallery from the first small hole 55 on the sliding oil plug 75 through the internal longitudinal through hole (because the first small hole 55 limits the flow speed, the damping force is further increased). The piston connecting rod assembly 76 continues to move upwards, the sliding oil plug 75 continues to slide towards the inside of the first deep groove 49, the first small hole 55 on the sliding oil plug 75 is gradually blocked by the second annular oil seal 51 in the piston connecting rod assembly 76, and the damping force gradually increases until all the first small holes 55 are blocked. Since all the first small holes 55 are blocked, the liquid in the upper oil chamber 13 is difficult to be compressed, and the piston connecting rod assembly 76 stops moving upwards, so that the function of limiting and preventing bottom contact is achieved. This is the second stage of the compression stroke of the upper chamber 13.

Operating principle of oil chamber 14 in compression stroke

When the piston link assembly 76 moves upward, the capacity of the lower oil chamber 14 increases, and the liquid in the lower pressure oil tank 3 flows into the lower oil chamber 14 through the lower oil pipe 30, the first check oil valve 15, and the first lower oil gallery 19 under the pressure of the inert gas in the lower pressure oil tank 3 (because of the restriction of the flow rate of the first check oil valve 15, the resistance increases when the liquid passes through the first check oil valve 15, which generates a damping force). Until the piston and connecting rod assembly 76 ceases upward movement. The above is the compression stroke of the lower oil chamber 14.

2) Working principle of rebound stroke

During rebound, the upper oil chamber 13 and the lower oil chamber 14 operate simultaneously.

Working principle of oil feeding chamber 13 in rebound stroke

When the piston link assembly 76 stops moving upwards and the upward impact force of the tire disappears, the liquid in the upper pressure oil tank 2 flows into the upper oil chamber 13 through the upper oil pipe 29, the first one-way oil valve 15, the first upper oil passage 18, the annular cone structure shallow groove 53 and the first small hole 55 of the sliding oil plug 75 under the pressure of the inert gas (because of the flow rate limitation of the first one-way oil valve 15, the resistance increases to generate the damping force when the liquid passes through the first one-way oil valve 15) (because of the flow rate limitation of the first small hole 55, the damping force further increases) and at the same time the piston link assembly 76 moves downwards. The sliding oil plug 75 is popped up under the action of the lower spring 47, the conical surface of the annular cone structure 52 at the upper part of the sliding oil plug 75 is continuously and tightly attached to the conical surface of the annular cone structure shallow groove 53, and the plugged first small hole 55 gradually slides out of the first deep groove 49 in the piston connecting rod assembly 76. Since the first small holes 55 for allowing the liquid to flow into the upper oil chamber 13 are gradually increased, the damping force is gradually reduced until the first small holes 55 all slide out of the first deep grooves 49, and the compression stroke of the spring 47 at the lower part of the sliding oil plug 75 is all released.

The piston connecting rod assembly 76 continues to move downwards, the conical surface of the annular cone structure 52 at the upper part of the sliding oil plug 75 is separated from the conical surface of the annular cone structure shallow groove 53, at this time, liquid does not need to flow into an upper oil chamber through the first small hole 55 (only the first one-way oil valve 15 provides damping force at this time) until the resilience force is completely released, and the vehicle tends to be stable. This is the second part of the rebound stroke of the upper chamber 13.

Operating principle of oil chamber 14 under rebound stroke

As the piston and connecting rod assembly 76 moves downwardly, the lower oil chamber 14 in the barrel 10 is compressed. The liquid in the lower oil chamber 11 flows into the lower pressure tank 3 through the first lower oil gallery 19, the first check oil valve 15, and the lower oil pipe 30. (because of the restriction of the flow rate by the first one-way oil valve 15, the resistance increases as the liquid passes through the first one-way oil valve 15 to generate a damping force) until the rebound force is completely released, the vehicle tends to be smooth. The above is the rebound stroke of the lower oil chamber 14.

Further, referring to fig. 3, the upper cover 16 includes a second cover top 62 and a third neck 63 disposed at the bottom of the second cover top 62, and the barrel 10 is disposed in the inner wall of the third neck 63 and is screwed; a second upper oil duct 60 is arranged in the second cover top 62, a central metal pipe 67 is arranged at the bottom of the second upper oil duct 60, and the central metal pipe 67 is communicated with the second upper oil duct 60; the pipe wall of the central metal pipe 67 is provided with a plurality of second small holes 73; one end of the upper oil pipe 29 is communicated with the second upper oil passage 60, and the other end is communicated with the upper pressure oil gas tank 2; the second cover top 62 is provided with a third hole 66 hinged with the vehicle body; the lower cover 17 comprises a second cover bottom 64 and a fourth neck 65 arranged at the top of the second cover bottom 64, the inner side of the fourth neck 65 is provided with internal threads, and the lower part of the cylinder 10 extends into the fourth neck 65 and is in threaded connection with the fourth neck 65; a second round hole is formed in the center of the bottom of the second cover bottom 64, a second sealing ring 68 is arranged in the second round hole, a second lower oil duct 61 is arranged in the second cover bottom 64, and the second lower oil duct 61 is communicated with the lower oil chamber 14; one end of the lower oil pipe 30 is communicated with the second lower oil duct 61, and the other end is communicated with the lower pressure oil gas tank 3; two second one-way oil valves 59 in opposite directions are arranged in the second upper oil passage 60 and the second lower oil passage 61; the piston connecting rod assembly 76 comprises a second piston 58 and a second connecting rod 57 arranged at the bottom of the second piston 58, a second deep groove 69 penetrating through the second piston 58 and extending into the second connecting rod 57 is arranged in the piston connecting rod assembly 76, a fourth annular oil seal 70 is arranged on the inner wall of the second deep groove 69, and a third annular oil seal 71 is arranged on the outer side of the second piston 58; a second lower connecting piece 21 is arranged at the bottom of the second connecting rod 57, a second screw at the upper part of the second lower connecting piece 21 is in threaded connection with a screw hole at the bottom of the second connecting rod 57, and a fourth hole 72 hinged with a vehicle suspension is arranged at the bottom of the second lower connecting piece 21; the outer diameter of the central metal tube 67 matches the inner diameter of the second deep groove 69, and the central metal tube 67 is slidable in the second deep groove 69.

The functions and advantages of the shock absorber assembly 2 are as follows:

The functions are as follows: the hydraulic suspension control system has the functions of supporting, damping, limiting and preventing bottom contact and limiting the maximum stroke, and can be matched with a hydraulic suspension control system assembly for use;

the advantages are that: the compression stroke and the rebound stroke have progressive damping effect.

The working principle of the shock absorber assembly 2 is as follows:

1) working principle of compression stroke

Wherein, working principle of oil feeding chamber 13 in compression stroke

The shock absorber assembly 2 is elastically supported by inert gas inside, force is transferred through liquid, and then the force is transferred to a vehicle suspension hinged with the shock absorber assembly through the piston connecting rod assembly 76, the second lower connecting piece 21 and the fourth hole 72, and finally the vehicle is elastically supported. When a vehicle encounters a raised obstacle during travel, the tire is subjected to an upward impact force. The impact force moves simultaneously upward via the tire, vehicle suspension, piston link assembly 76. When the piston-link assembly 76 moves upward, the pressure in the upper oil chamber 13 increases, and the liquid in the upper oil chamber 13 flows into the upper pressure oil tank 2 through the small hole in the central metal pipe 67, the second upper oil passage 60, the second one-way oil valve 59, and the upper oil pipe 29. (because of the restriction of the flow rate by the second one-way oil valve 59, the resistance increases as the fluid passes through the second one-way oil valve 59, creating a damping force.) during the upward movement of the piston link assembly 76, fluid can only flow into the second upper gallery 60 from the second orifice 73 in the central metal tube 67 (because of the restriction of the flow rate by the second orifice 73, creating a damping force). As the piston and connecting rod assembly 76 continues to move upward, the central metal tube 67 slides into the second deep groove 69 in the piston and connecting rod assembly 76, the second small holes 73 are gradually blocked, and the damping force gradually increases until all of the second small holes 73 are blocked. Since all the second small holes 73 are blocked, the liquid in the upper oil chamber 13 is difficult to be compressed, and the piston connecting rod assembly 76 stops moving upwards, so that the function of limiting and preventing bottom contact is achieved. The above is the compression stroke of the upper oil chamber 14.

Operating principle of oil chamber under compression stroke

When the piston link assembly 76 moves upward, the capacity of the lower oil chamber 14 increases, and the liquid in the lower pressure oil tank 3 flows into the lower oil chamber 14 through the lower oil pipe 30, the second check oil valve 59, and the second lower oil passage 61 under the pressure of the inert gas in the lower pressure oil tank 3 (because of the restriction of the flow rate of the second check oil valve 59, the resistance increases when the liquid passes through the second check oil valve 59 to generate a damping force) until the piston link assembly 76 stops moving upward. The above is the compression stroke of the lower oil chamber 14.

2) Working principle of rebound stroke

During the rebound process, the upper oil chamber 13 operates simultaneously with the lower oil chamber 14.

Working principle of oil feeding chamber 13 in rebound stroke

When the piston link assembly 76 stops moving upward and the upward impact force of the tire disappears, the liquid in the upper pressure oil tank 2 flows into the upper oil chamber 13 through the upper oil pipe 29, the second one-way oil valve 59, the second upper oil passage 60, the central metal pipe 67 and the second small hole 73 under the pressure of the inert gas (because of the restriction of the flow rate of the second one-way oil valve 59, the damping force is generated by the increase of the resistance when the liquid passes through the second one-way oil valve 59) (because of the restriction of the flow rate of the second small hole 73, the damping force is further increased). At the same time, the piston and connecting rod assembly 76 moves downwardly. The second small hole 73 in the central metal tube 67 gradually slides out of the second deep groove 69 of the piston link assembly 76, and the damping force gradually weakens until the rebound force is completely released and the vehicle tends to be smooth. The above is the rebound stroke of the upper chamber 13.

Operating principle of oil chamber 14 under rebound stroke

As the piston and connecting rod assembly 76 moves downwardly, the lower oil chamber 14 in the barrel 10 is compressed. The liquid in the lower oil chamber 14 flows into the lower pressure tank 3 through the second lower oil gallery 61, the second check oil valve 59, and the lower oil pipe 30. (because of the restriction of the flow rate by the second one-way oil valve 59, the resistance increases as the liquid passes through the second one-way oil valve 59 creating a damping force) until the rebound force is completely released and the vehicle tends to be smooth. The above is the rebound stroke of the lower oil chamber 14.

This cover liquid gas suspension control system assembly structurally divide into triplex, control system, gas circuit and oil circuit:

1) control system

The device comprises a main controller 39, a pressure sensor 38, a fuel level sensor 37, a vehicle body height sensor 74, a first electromagnetic air valve 27, a second electromagnetic air valve 28, a first electromagnetic oil valve 35, a second electromagnetic oil valve 36, a signal line 40 and a control line 41.

2) Gas circuit

Comprises an air pump 5, a low-pressure air tank 4, a high-pressure air tank 6, a first high-pressure air pipe 24, a second high-pressure air pipe 25, a first return air pipe 22, a second return air pipe 23 and a third high-pressure air pipe 26.

3) Oil circuit

The oil pump comprises an oil pump 8, an oil storage pot 9, a high-pressure oil gas tank 7, a first electromagnetic oil valve 35, a second electromagnetic oil valve 36, a first high-pressure oil pipe 31, a second high-pressure oil pipe 32, a first return oil pipe 33 and a second return oil pipe 34.

The working principle of the liquid-gas suspension control system assembly is as follows:

in the normal running state of the vehicle, all the sensors (including the pressure sensor 38, the fuel level sensor 37, and the body height sensor 74) connected to the main controller 39 are always kept in operation.

When the main controller 39 does not issue an operation command, all the solenoid valves connected to the main controller 39 are always in a blocking state. (the air passage and the oil passage are closed) the air pump 5 and the oil pump 8 are kept in a stop state.

When the value collected by the sensor does not accord with the value set by the main controller 39, the electromagnetic valve is automatically controlled to be opened and closed, so that the collected data keeps consistent with the set value.

The medium in the high-pressure oil tank 7 is inert gas and liquid, and the inert gas is above and the liquid is below due to gravity. The high-pressure inert gas is communicated with the high-pressure oil tank 7 from the high-pressure gas tank 6 through a third high-pressure gas pipe 26.

The hydro-pneumatic suspension control system assembly has 10 basic working conditions.

Working condition 1: the upper pressure tank 2 is filled with oil (activated when the height value acquired by the body height sensor 74 is lower than the height value set by the main controller 39).

The main controller 39 opens the first electromagnetic oil valve 35 provided in the first high-pressure oil pipe 31, and the liquid in the high-pressure oil tank 7 flows into the upper-pressure oil tank 2 through the first high-pressure oil pipe 31.

Working condition 2: the upper pressure oil tank 2 is drained (which is started when the height value collected by the body height sensor 74 is higher than the height value set by the main controller 39), the main controller 39 opens the second electromagnetic oil valve 36 provided on the first return oil pipe 33, and the liquid in the upper pressure oil tank 2 flows into the oil reservoir 9 through the first return oil pipe 33.

Working condition 3: the lower pressure oil tank 3 is filled with oil (when the pressure value acquired by the pressure sensor 38 on the lower pressure oil tank 3 is lower than the pressure value set by the main controller 39), the main controller 39 opens the first electromagnetic oil valve 35 arranged on the second high pressure oil pipe 32, and the liquid in the high pressure oil tank 7 flows into the lower pressure oil tank 3 through the second high pressure oil pipe 32.

Working condition 4: the lower pressure oil tank 3 is drained (when the pressure value collected by the pressure sensor 38 of the lower pressure oil tank 3 is higher than the height value set by the main controller 39), the main controller 39 opens the second electromagnetic oil valve 36 disposed on the second return oil pipe 34, and the liquid in the lower pressure oil tank 35 flows into the oil storage pot 9 through the second return oil pipe 34.

Working condition 5: the upper pressure oil tank 2 is charged with air (when the oil level value detected by the oil level sensor 37 of the upper pressure oil tank 2 is higher than the oil level value set by the main controller 39, the main controller 39 opens the first solenoid valve 27 provided in the first high pressure gas pipe 24, and the inert gas in the high pressure gas tank 6 flows into the upper pressure oil tank 2 through the first high pressure gas pipe 24.

Working condition 6: the upper pressure oil tank 2 is vented (which is started when the oil level value detected by the oil level sensor 37 of the upper pressure oil tank 2 is lower than the oil level value set by the main controller 39), the main controller 39 opens the second solenoid valve 28 provided in the first return air pipe 22, and the compressed air in the upper pressure oil tank 2 flows into the low pressure tank 4 through the first return air pipe 22.

Working condition 7: the lower pressure gas tank 3 is charged (when the oil level value acquired by the oil level sensor 37 on the lower pressure gas tank 3 is higher than the oil level value set by the main controller 39), the main controller 39 opens the first electromagnetic gas valve 27 provided on the second high pressure gas pipe 25, and the inert gas in the high pressure gas tank 6 flows into the lower pressure gas tank 3 through the second high pressure gas pipe 25.

Working condition 8: the low pressure gas tank 3 is vented (when the oil level value acquired by the oil level sensor 37 of the low pressure gas tank 3 is lower than the oil level value set by the main controller 39), the main controller 39 opens the second electromagnetic gas valve 28 provided on the second return gas pipe 23, and the compressed air in the low pressure gas tank 3 flows into the low pressure gas tank 4 through the return gas pipe.

Working condition 9: the air pump 5 is operated (when the value collected by the pressure sensor 38 on the low pressure gas tank 4 is higher than the value set by the main controller 39), and the main controller 39 injects the inert gas in the low pressure gas tank 4 into the high pressure gas tank 6 by activating the air pump 5.

Working condition 10: the oil pump 8 is operated (when the value of the oil level collected by the oil level sensor 37 on the oil storage pot 9 is higher than the value set by the main controller 39), and the main controller 39 injects the liquid in the oil storage pot 9 into the high-pressure oil tank 7 by starting the oil pump 8.

Wherein, operating mode 1, operating mode 2 are used for hanging height control. And working conditions 5 and 6 are used for adjusting the liquid-gas proportion in the upper pressure oil-gas tank. And the working condition 7 and the working condition 8 are used for adjusting the pressure of the inert gas in the lower pressure oil gas tank 3. And working condition 3 and working condition 4 are used for adjusting the liquid-gas ratio in the down-pressure oil-gas tank.

Through 10 basic operating modes, can satisfy different service environment's demand (adjust the high support characteristic of hanging, resilience characteristic), illustrate the working method and the regulation method of several kinds of common road conditions modes, specifically as follows:

1) standard mode

The performance parameters of each aspect with moderate height in the standard mode are balanced, and the standard mode has better comfort and certain trafficability.

2) High speed comfort mode

When the vehicle enters a high-grade highway, it can be switched from the standard mode to the high-speed comfort mode. The method is to reduce the height of the vehicle body through the working condition 2. At the moment, the height of the vehicle body is reduced, the liquid level height in the upper pressure oil-gas tank 2 is not changed, the height of the vehicle body is reduced, and meanwhile, the compressibility of the suspension is not changed. The advantages are high comfort, poor suspension support, easy bottom support and poor high-speed stability.

3) High speed motion mode

The change from the high-speed comfort mode to the high-speed movement mode requires that the liquid level in the upper pressure oil-gas tank 2 is increased by starting the working condition 1 and the working condition 6, and the content of the compressible inert gas is reduced. At the moment, the height of the vehicle body is the same as that of the high-speed comfort mode, the suspension support performance is enhanced, the high-speed stability is good, and the comfort is poor. If the high-speed stability of hanging needs to be further improved, the pressure in the lower pressure oil gas tank 3 can be improved through the working condition 3, so that the rebound stroke of the hanging is limited, and stronger curve performance is obtained (when a vehicle turns, the stroke of the wheel hanging on the inner side of the curve is not easy to stretch).

4) Off-road mode

When the vehicle enters a road with poor road conditions, the proportion of the inert gas in the upper pressure oil gas tank 2 and the height of the vehicle body can be increased through the working condition 5. At the moment, the gap between the vehicle body and the ground is large, the suspension is soft, and the vehicle has better off-road performance.

5) High-throughput mode

When a vehicle needs to pass through a higher step or a deeper ravine (the road condition is close to the limit of the vehicle passing performance), if the vehicle speed is not controlled well, the vehicle is easy to support due to the fluctuation of the vehicle suspension system. This situation is more suitable for switching to the high-throughput mode. The oil level height in the upper pressure oil gas tank 2 is increased while the ground clearance of the vehicle body is kept through the working condition 1 and the working condition 6, the content of compressible inert gas is reduced, and the vehicle suspension is not easy to compress at a high position.

The utility model discloses a function of liquid gas suspension control system assembly, as follows: 1) the adjustment of the liquid amount in the upper oil chamber 13, 2) the adjustment of the liquid-gas ratio in the upper pressure oil-gas tank 2, 3) the adjustment of the liquid-gas ratio in the lower pressure oil-gas tank 3, and 4) the adjustment of the inert gas pressure in the lower pressure oil-gas tank 3.

The utility model discloses a liquid gas suspension control system assembly advantage, as follows:

1) high automation degree

By collecting the information of the plurality of pressure sensors 38, the fuel level sensor 37 and the vehicle height sensor 74, when the collected value does not accord with the set value of the main controller 39, the electromagnetic valve is automatically controlled to be opened and closed, so that the collected data keeps consistent with the set value. In actual use, when the parameters of the suspension system need to be changed, the main controller 39 can automatically make adjustments only by inputting new values.

2) The adjusting function is comprehensive, and the device has the functions of adjusting the liquid amount of the upper oil chamber 13, adjusting the liquid-gas proportion of the upper pressure oil-gas tank 2, adjusting the liquid-gas proportion of the lower pressure oil-gas tank 3 and adjusting the inert gas pressure of the lower pressure oil-gas tank 3.

3) Long service life

The liquid-gas suspension control system assembly uses a closed-cycle gas path system, and takes inert gas as an elastic medium. Compared with an open type gas path system, the gas path system can effectively prevent moisture impurities from entering the gas path and polluting liquid. And the use of the inert gas can effectively slow down the oxidation speed of the liquid and the internal parts, thereby prolonging the service life.

The utility model discloses multi-functional liquid gas linkage's advantage, as follows:

1) the hydro-pneumatic suspension control system assembly is applied to a vehicle and used in the vehicle, so that the vehicle has multiple adjusting functions;

2) the shock absorber assembly 1 can be used on a vehicle independently, can also be used in cooperation with a hydro-pneumatic suspension control system assembly, is applied to the vehicle, and plays a role in elastic support, damping, limiting and bottom-touching prevention and limiting the maximum stroke.

3) The shock absorber assembly 2 can be used on a vehicle independently, can also be used in cooperation with a hydro-pneumatic suspension control system assembly, is applied to the vehicle, and plays the roles of elastic support, damping, limiting and bottom-touching prevention and limiting the maximum stroke.

4) The implementation method of the shock absorber assembly 1 with two-stage stroke damping effect and the second stroke with progressive damping effect is used in other shock absorbers.

5) The progressive damping effect of the shock absorber assembly 2 is achieved in other shock absorbers.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. A multifunctional hydro-pneumatic suspension device is characterized by comprising a hydro-pneumatic suspension control system assembly and a shock absorber assembly;

2. The multifunctional liquid-gas suspension device as claimed in claim 1, wherein the upper cover comprises a first cover top and a first neck part arranged at the bottom of the first cover top, and the upper part of the cylinder body extends into the first neck part and is in threaded connection with the first neck part; a first upper oil duct communicated with the upper pressure oil-gas tank is arranged in the first cover top, an annular cone structure shallow groove is arranged at the bottom of the first upper oil duct, the upper part of the annular cone structure shallow groove is communicated with the first upper oil duct, and the lower part of the annular cone structure shallow groove is communicated with the upper oil chamber;

3. The multifunctional liquid-gas suspension device as claimed in claim 1, wherein the upper cover comprises a second cover top and a third neck part arranged at the bottom of the second cover top, and the cylinder body is arranged in the inner wall of the third neck part and is in threaded connection with the third neck part; a second upper oil duct is arranged in the second cover top, a central metal pipe is arranged at the bottom of the second upper oil duct, and the central metal pipe is communicated with the second upper oil duct; the pipe wall of the central metal pipe is provided with a plurality of second small holes; one end of the oil feeding pipe is communicated with the second oil feeding channel, and the other end of the oil feeding pipe is communicated with the upper pressure oil gas tank; the second cover top is provided with a third hole hinged with the vehicle body;