Damping suspension system and vehicle suspension device

Abstract

The embodiment of the utility model relates to the technical field of vehicle suspensions, in particular to a damping suspension system and a vehicle suspension device, which comprise a front suspension hydraulic cylinder provided with a first piston, and the first piston forms a first piston upper chamber and a first piston lower chamber in the front suspension hydraulic cylinder; the rear suspension hydraulic cylinder is provided with a second piston, and the second piston forms a second piston upper chamber and a second piston lower chamber in the rear suspension hydraulic cylinder; the first pipeline is communicated with the first electric control valve; the second pipeline is communicated with the first damping adjusting valve, the second electric control valve, the third electric control valve and the second damping adjusting valve, the second pipeline is provided with a first oil return pressure tank, and the first oil return pressure tank is respectively communicated with the first damping adjusting valve and the second electric control valve. The buffering and damping effects of the suspension can be adjusted, the requirements of different road conditions are met, the driving experience of a user is improved, and the texture of the whole vehicle is improved.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of vehicle suspension, and in particular to a shock absorbing suspension system and a vehicle suspension device. Background Art

[0002] In various technical fields, automobile suspension systems usually use springs or hydraulic components to provide shock absorption and buffering functions. However, this method is relatively simple, the adjustment method is also quite fixed, and lacks sufficient flexibility. This may lead to low passenger comfort when the vehicle is driving, especially on bumpy roads, where passengers will feel more uncomfortable. Therefore, improving the design and operation of the automobile suspension system can further improve the driving quality and ride comfort of the entire vehicle. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a shock absorbing suspension system and a vehicle suspension device to solve the problems of the prior art suspension system having a relatively simple shock absorbing and buffering method, a relatively rigid regulating method and poor flexibility.

[0004] One solution of the utility model provides a vehicle suspension device, comprising:

[0005] A front suspension hydraulic cylinder is provided with a first piston, wherein the first piston forms a first piston upper chamber and a first piston lower chamber in the front suspension hydraulic cylinder;

[0006] A rear suspension hydraulic cylinder is provided with a second piston, wherein the second piston forms a second piston upper chamber and a second piston lower chamber in the rear suspension hydraulic cylinder;

[0007] A first pipeline connected to a first electrically controlled valve;

[0008] A second pipeline is connected to the first damping adjustment valve, the second electrically controlled valve, the third electrically controlled valve and the second damping adjustment valve, the second pipeline is provided with a first return oil pressure tank, the first return oil pressure tank is respectively connected to the first damping adjustment valve and the second electrically controlled valve, the second pipeline is provided with a second return oil pressure tank, the second return oil pressure tank is respectively connected to the third electrically controlled valve and the second damping adjustment valve, and the second return oil pressure tank is respectively connected to the first piston lower chamber and the second piston lower chamber;

[0009] A third pipeline is connected to the fourth electrically controlled valve and the fifth electrically controlled valve, and the third pipeline is provided with a fourth pipeline connected thereto;

[0010] a high-pressure air pump, the high-pressure air pump being connected to the third pipeline and the fourth pipeline respectively;

[0011] A high-pressure oil pump is connected to the third pipeline and the second pipeline respectively.

[0012] In one of the schemes of the utility model, the high-pressure air pump is provided with a sixth electric-controlled valve and a seventh electric-controlled valve on the pipelines connected with the first oil return pressure tank and the second oil return pressure tank respectively;

[0013] Wherein, the second electrically controlled valve, the third electrically controlled valve and the fifth electrically controlled valve are kept in a normally closed state, so that when the sixth electrically controlled valve and the seventh electrically controlled valve are opened, the high-pressure air pump operates and provides high-pressure gas to the first return oil pressure tank or the second return oil pressure tank.

[0014] In one solution of the utility model, a second electrically controlled valve and a third electrically controlled valve are provided at the end of the second pipeline that connects the first oil return pressure tank with the second oil return pressure tank, and the second electrically controlled valve and the third electrically controlled valve are used to control the connection and disconnection between the first piston lower chamber and the second piston lower chamber;

[0015] Wherein, the second electrically controlled valve and the third electrically controlled valve are kept in a normally open state.

[0016] In one solution of the utility model, the third pipeline is connected between the high-pressure oil pump and the second pipeline, and a fourth electric-controlled valve is provided on the third pipeline;

[0017] Wherein, the fourth electrically controlled valve is kept in a normally closed state.

[0018] In one scheme of the utility model, a first damping adjustment valve and a second damping adjustment valve are arranged in the pipeline connecting the first piston lower chamber and the second piston; the first damping adjustment valve is connected to the first piston lower chamber, and the second damping adjustment valve is connected to the second piston lower chamber.

[0019] In one solution of the utility model, a first electrically controlled valve is arranged in the pipeline connecting the first piston upper chamber and the second piston upper chamber, and the first pipeline is connected between the fourth electrically controlled valve and the fifth electrically controlled valve on the third pipeline.

[0020] In one solution of the utility model, the input end of the high-pressure oil pump is connected to the output end of the hydraulic oil storage tank.

[0021] In one solution of the present invention, the third pipeline is connected to the first pipeline, the second pipeline and the fourth pipeline.

[0022] In one of the schemes of the utility model, the tops of the first oil return pressure tank and the second oil return pressure tank are both provided with inlet and exhaust valves, and the high-pressure air pump delivers high-pressure gas from the top of the first oil return pressure tank or the second oil return pressure tank through the inlet and exhaust valves.

[0023] In one of the schemes of the utility model, a vehicle suspension device is also pointed out, comprising: a vehicle frame and a shock-absorbing suspension system, wherein the shock-absorbing suspension system is mounted on the vehicle frame, and a piston push rod in the shock-absorbing suspension system is respectively connected to the front and rear wheels;

[0024] Wherein, the shock absorbing suspension system may adopt a shock absorbing suspension system as described in any one of the above-mentioned schemes.

[0025] The beneficial effects of the utility model are:

[0026] In the embodiment of the utility model, the third pipeline and the fourth pipeline on the left side together with the first return oil pressure tank and the second return oil pressure tank can be controlled by the sixth electrically controlled valve and the seventh electrically controlled valve. The high-pressure air pump introduces high-pressure gas into the first return oil pressure tank and the second return oil pressure tank through the third pipeline and the fourth pipeline on the left side, and the sixth electrically controlled valve and the seventh electrically controlled valve can be closed after the high-pressure gas required by the setting is introduced. The high-pressure air pump fills the first piston upper chamber and the second piston upper chamber with high-pressure gas through the third pipeline and the first pipeline connected thereto. In this process, the fifth electrically controlled valve and the first electrically controlled valve are opened, and the fourth electrically controlled valve is closed. Thereby, the first piston can support the wheel downward relative to the front suspension hydraulic cylinder, and the second piston can support the wheel downward relative to the rear suspension hydraulic cylinder, while the second pipeline, the second electrically controlled valve and the third electrically controlled valve can ensure the balance of the air pressure of the first return oil pressure tank and the second return oil pressure tank, thereby improving the balance of the buffering and shock absorbing effects. It can be seen that through the above-mentioned scheme, the sixth electrically controlled valve, the seventh electrically controlled valve and the high-pressure air pump cooperate with each other to flexibly adjust the air pressure value of the high-pressure gas in the upper chamber of the first piston and the upper chamber of the second piston, thereby adjusting the buffering and shock absorbing effects of the suspension to meet the needs of different road conditions, which is beneficial to improving the user's driving experience and improving the texture of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a shock absorbing suspension system in an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the second bridge suspension scheme of Example 2 of the utility model;

[0030] Figure 3 This is a schematic diagram of a three-bridge suspension scheme of Embodiment 3 of the present utility model;

[0031] Figure 4 This is a schematic diagram of a four-bridge suspension scheme according to Embodiment 4 of the present utility model.

[0032] The following are the descriptions of the figures:

[0033] 10. Front suspension hydraulic cylinder; 101. First piston; 102. First piston upper chamber; 103. First piston lower chamber;

[0034] 20. rear suspension hydraulic cylinder; 201. second piston; 202. second piston upper chamber; 203. second piston lower chamber;

[0035] 30. first pipeline; 301. first electric control valve;

[0036] 40, second pipeline; 401, first damping adjustment valve; 402, first return oil pressure tank; 403, second electric control valve; 404, third electric control valve; 405, second return oil pressure tank; 406, second damping adjustment valve;

[0037] 50, third pipeline; 501, fourth electric control valve; 502, fifth electric control valve; 503, sixth electric control valve

[0038] 60, fourth pipeline; 601, seventh electric control valve;

[0039] 70. High pressure air pump;

[0040] 80. High-pressure oil pump;

[0041] A, connecting control valve; A1, left suspension pipeline; A2, right suspension pipeline; 1001, first high-pressure gas storage tank; 1002, second high-pressure gas storage tank; 1003, middle suspension cylinder. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0045] Example 1

[0046] Please refer to Figure 1 In one embodiment of the utility model, a shock absorbing suspension system is also provided, comprising:

[0047] The front suspension hydraulic cylinder 10 is provided with a first piston 101, wherein the first piston 101 forms a first piston upper chamber 102 and a first piston lower chamber 103 in the front suspension hydraulic cylinder 10;

[0048] The rear suspension hydraulic cylinder 20 is provided with a second piston 201, wherein the second piston 201 forms a second piston upper chamber 202 and a second piston lower chamber 203 in the rear suspension hydraulic cylinder 20;

[0049] The first pipeline 30 is connected to the first electric control valve 301;

[0050] The second pipeline 40 is connected to the first damping adjustment valve 401, the second electric control valve 403, the third electric control valve 404 and the second damping adjustment valve 406. The second pipeline 40 is provided with a first return oil pressure tank 402, and the first return oil pressure tank 402 is respectively connected to the first damping adjustment valve 401 and the second electric control valve 403. The second pipeline 40 is provided with a second return oil pressure tank 405, and the second return oil pressure tank 405 is respectively connected to the third electric control valve 404 and the second damping adjustment valve 406. The second return oil pressure tank 405 is respectively connected to the first piston lower chamber 103 and the second piston lower chamber 203;

[0051] A third pipeline 50 is connected to the fourth electrically controlled valve 501 and the fifth electrically controlled valve 502, and the third pipeline 50 is provided with a fourth pipeline 60 connected thereto;

[0052] A high-pressure air pump 70, wherein the high-pressure air pump 70 is connected to the third pipeline 50 and the fourth pipeline 60 respectively;

[0053] The high-pressure oil pump 80 is connected to the third pipeline 50 and the second pipeline 40 respectively.

[0054] When the front wheel encounters an obstacle and moves upward violently, the existing technology will cause the front of the car to bounce higher and the rear suspension to remain unchanged. When the rear wheel encounters an obstacle or protrusion, the rear of the car body will rise very high while the front of the car body will remain relatively unchanged, which will produce angular vibration, that is, a reciprocating motion of rising and falling at the front.

[0055] Compared with the prior art, in the embodiment of the utility model, the third pipeline 50 and the fourth pipeline 60 on the left together with the first return oil pressure tank 402 and the second return oil pressure tank 405 can be controlled by the sixth electrically controlled valve 503 and the seventh electrically controlled valve 601. The high-pressure air pump 70 introduces high-pressure gas into the first return oil pressure tank 402 and the second return oil pressure tank 405 through the third pipeline 50 and the fourth pipeline 60 on the left, and the sixth electrically controlled valve 503 and the seventh electrically controlled valve 601 can be closed after the high-pressure gas required by the setting is introduced. The high-pressure air pump 70 fills the first piston upper chamber 102 and the second piston upper chamber 202 with high-pressure gas through the third pipeline 50 and the first pipeline 30 connected thereto. In this process, the fifth electrically controlled valve 502 and the first electrically controlled valve 301 are opened, and the fourth electrically controlled valve 501 is closed. Thereby, the first piston 101 can support the wheel downward relative to the front suspension hydraulic cylinder 10, and the second piston 201 can support the wheel downward relative to the rear suspension hydraulic cylinder 20, while the second pipeline 40 and the second electric control valve 403 and the third electric control valve 404 can ensure the balance of the air pressure of the first return oil pressure tank 402 and the second return oil pressure tank 405, thereby improving the balance of the buffering and shock absorbing effect. It can be seen that through the above-mentioned scheme, the sixth electric control valve 503, the seventh electric control valve 601 and the high-pressure air pump 70 cooperate with each other to flexibly adjust the air pressure value of the high-pressure gas in the first piston upper chamber 102 and the second piston upper chamber 202, thereby adjusting the buffering and shock absorbing effect of the suspension to meet the needs of different road conditions, which is beneficial to improving the user's driving experience and improving the texture of the entire vehicle.

[0056] Secondly, the front suspension hydraulic cylinder 10 and the rear suspension hydraulic cylinder 20 are connected through part of the first pipeline 30, which can reduce the angular vibration of the vehicle body when the vehicle encounters severe road conditions. When the front wheel encounters an obstacle and moves upward violently, the first piston 101 can move upward through the first pipeline 30 to transmit part of the pressure to the second piston 201 of the rear suspension hydraulic cylinder 20 to move downward, so that the rear part of the vehicle body rises at the same time.

[0057] In another application scenario of this embodiment, the high-pressure air pump 70 is provided with a sixth electrically controlled valve 503 and a seventh electrically controlled valve 601 on the pipelines communicating with the first oil return pressure tank 402 and the second oil return pressure tank 405, respectively;

[0058] Among them, the second electrically controlled valve 403, the third electrically controlled valve 404 and the fifth electrically controlled valve 502 are maintained in a normally closed state, so that when the sixth electrically controlled valve 503 and the seventh electrically controlled valve 601 are opened, the high-pressure air pump 70 runs and provides high-pressure gas to the first return oil pressure tank 402 or the second return oil pressure tank 405.

[0059] In another application scenario of the present embodiment, a second electrically controlled valve 403 and a third electrically controlled valve 404 are provided on the end of the second pipeline 40 that connects the first return oil pressure tank 402 with the second return oil pressure tank 405. The second electrically controlled valve 403 and the third electrically controlled valve 404 are used to control the connection and disconnection between the first piston lower chamber 103 and the second piston lower chamber 203.

[0060] The second electrically controlled valve 403 and the third electrically controlled valve 404 are kept in a normally open state.

[0061] The second electrically controlled valve 403 can be used to regulate the closing or connection between the first oil return pressure tank 402 and the high-pressure oil pump 80 , and the third electrically controlled valve 404 can be used to regulate the closing or connection between the high-pressure oil pump 80 and the second oil return pressure tank.

[0062] In another application scenario of this embodiment, the third pipeline 50 is connected between the high-pressure oil pump 80 and the second pipeline 40, and a fourth electronically controlled valve 501 is provided on the third pipeline 50;

[0063] Wherein, the fourth electrically controlled valve 501 is kept in a normally closed state.

[0064] The second pipeline 40 is connected to the third pipeline 50 , and the high-pressure oil pump 80 can be connected to both the second pipeline 40 and the third pipeline 50 , and the fourth electrically controlled valve 501 is used to regulate the connection or closing between the third pipeline 50 and the first pipeline 30 .

[0065] In another application scenario of the present embodiment, a first damping adjustment valve 401 and a second damping adjustment valve 406 are arranged in a pipeline connecting the first piston lower chamber 103 and the second piston 201 ; the first damping adjustment valve 401 is connected to the first piston lower chamber 103 , and the second damping adjustment valve 406 is connected to the second piston lower chamber 203 .

[0066] The hydraulic oil in the first piston lower chamber 103 and the second piston lower chamber 203 can be transported to the first oil return pressure tank 402 and the second oil return pressure tank 405 through the second pipeline 40, and then the second electric control valve 403 and the third electric control valve 404 are closed, and the hydraulic oil is transported to the first piston upper chamber 102 and the second piston upper chamber 202 through the third pipeline 50 and the first pipeline 30, thereby increasing the pressure to make the first piston 101 and the second piston 201 move downward to increase the chassis height; conversely, reducing the pressure to make the first piston 101 and the second piston 201 move upward to reduce the chassis height

[0067] In another application scenario of this embodiment, a first electrically controlled valve 301 is provided in the pipeline connecting the first piston upper chamber 102 and the second piston upper chamber 202 , and the first pipeline 30 is connected between the fourth electrically controlled valve 501 and the fifth electrically controlled valve 502 on the third pipeline 50 .

[0068] The first electrically controlled valve 301 can be used to regulate the connection or closure of the first piston upper chamber 102, and can also control the flow of hydraulic oil into and out of the first piston upper chamber 102. The fourth electrically controlled valve 501 and the fifth electrically controlled valve 502 are used to regulate the connection or closure of the third pipeline 50.

[0069] In another application scenario of the present embodiment, the first electrically controlled valve 301 may also function to cut off the oil circuit through the brake signal switch of the brake pedal when the vehicle is in emergency braking while driving at high speed, thereby preventing the pressure in the front suspension hydraulic cylinder 10 from being transmitted to the rear suspension hydraulic cylinder 20 through the first pipeline 30 during braking, thereby preventing excessive nodding.

[0070] After closing the fourth electrically controlled valve 501 and the second electrically controlled valve 403, the hydraulic oil in the hydraulic oil storage tank can be transported to the second oil return pressure tank 405 through the high-pressure oil pump 80 to increase the pressure of the rear suspension hydraulic cylinder 20 alone, thereby increasing the cargo capacity.

[0071] In another application scenario of this embodiment, the input end of the high-pressure oil pump 80 is connected to the output end of the hydraulic oil storage tank. The third pipeline 50 is connected to the first pipeline 30 , the second pipeline 40 and the fourth pipeline 60 .

[0072] In another application scenario of the present embodiment, the tops of the first return oil pressure tank 402 and the second return oil pressure tank 405 are both provided with inlet and exhaust valves, and the high-pressure air pump 70 delivers high-pressure gas from the tops of the first return oil pressure tank 402 or the second return oil pressure tank 405 through the inlet and exhaust valves.

[0073] In another application scenario, when the vehicle encounters a bumpy road, the elastic potential energy of the first piston upper chamber 102, the second piston lower chamber 202, the first return oil pressure tank 402, and the second return oil pressure tank 405 increases and pushes the first piston 101 and the second piston 201 downward violently. At this time, the oil in the first piston lower chamber 103 and the second piston lower chamber 203 converts the elastic potential energy into heat energy through the first damping adjustment valve 401 or the second damping adjustment valve 402, causing the first piston 101 and the second piston 201 to slowly move downward, thereby eliminating the bumps in the vehicle.

[0074] In one embodiment of the utility model, a vehicle suspension device is also provided, comprising: a vehicle frame and a shock-absorbing suspension system, wherein the shock-absorbing suspension system is mounted on the vehicle frame, and a piston push rod in the shock-absorbing suspension system is connected to the front and rear wheels respectively;

[0075] The shock absorbing suspension system may adopt a shock absorbing suspension system as described in any one of the above-mentioned embodiments.

[0076] Example 2

[0077] like Figure 2 As shown, the utility model provides a shock-absorbing suspension system, including a left suspension pipeline A1 and a right suspension pipeline A2; the left suspension pipeline A1 includes a front suspension hydraulic cylinder 10 and a rear suspension hydraulic cylinder 20; the right suspension pipeline A2 includes a front suspension hydraulic cylinder 10 and a rear suspension hydraulic cylinder 20; the left suspension pipeline A1 and the right suspension pipeline A2 are connected by a common oil and gas circuit, and the common oil and gas circuit is provided with a connection control valve A, and the connection control valve A is used to control the connection or closing of the common oil and gas circuit, thereby cutting off or connecting the left suspension pipeline A1 and the right suspension pipeline A2. A high-pressure air pump 70 and a high-pressure oil pump 80 are provided on the common oil and gas circuit, and are used to supply high-pressure oil or high-pressure gas to the left suspension pipeline A1 and / or the right suspension pipeline A2.

[0078] In this embodiment, the connecting control valve A is closed when the vehicle is traveling at high speed to prevent the vehicle from tilting when turning at high speed, and the connecting control valve A is opened when the vehicle is traveling at low speed in bad road conditions to prevent the vehicle body from swaying left and right due to bumps.

[0079] In an application scenario of the present embodiment, in any one of the two front suspension hydraulic cylinders 10, the first piston upper chamber 102 is connected to the first high-pressure gas storage tank 1001, a sixth control valve 503 is provided between the first high-pressure gas storage tank 1001 and the high-pressure air pump 70, the first piston lower chamber 103 is connected to the first return oil pressure tank 402, a first damping adjustment valve 401 is provided between the first piston lower chamber 103 and the first return oil pressure tank 402, and a second electric control valve 403 is provided between the first return oil pressure tank 402 and the high-pressure oil pump 80;

[0080] In any one of the two rear suspension hydraulic cylinders 20 mentioned above, the second piston upper chamber 202 is connected to a second high-pressure air tank 1002, a seventh electrically controlled valve 601 is provided between the second high-pressure air tank 1002 and the high-pressure air pump 70, the second piston lower chamber 203 is connected to a second return oil pressure tank 405, a second damping adjustment valve 406 is provided between the second piston lower chamber 203 and the second return oil pressure tank 405, and a third electrically controlled valve 404 is provided between the second return oil pressure tank 405 and the high-pressure oil pump 80.

[0081] In this application scenario, the double-bridge suspension effect of the four wheels on the left and right sides can be achieved by combining the high-pressure oil pump and the high-pressure air pump with various pipelines and valves. In special road conditions, such as the left body roll, the switch connecting the control valve A and the left suspension pipeline A1 can also be used to add high-pressure gas to the left suspension pipeline A1, so that the piston in the left suspension pipeline A1 moves downward, and the body is raised to adjust the body roll caused by uneven roads. The adjustment method for the right body roll is similar.

[0082] Example 3

[0083] like Figure 3 As shown, the utility model provides a shock-absorbing suspension system, including a left suspension pipeline A1 and a right suspension pipeline A2; the left suspension pipeline A1 includes a front suspension hydraulic cylinder 10, a middle suspension cylinder 1003 and a rear suspension hydraulic cylinder 20; the right suspension pipeline A2 includes a front suspension hydraulic cylinder 10, a middle suspension cylinder 1003 and a rear suspension hydraulic cylinder 20; the left suspension pipeline A1 and the right suspension pipeline A2 are connected by a common oil and gas circuit, and the common oil and gas circuit is provided with a connection control valve A, and the connection control valve A is used to control the connection or closing of the common oil and gas circuit, thereby cutting off or connecting the left suspension pipeline A1 and the right suspension pipeline A2. A high-pressure air pump 70 and a high-pressure oil pump 80 are provided on the common oil and gas circuit, and are used to supply high-pressure oil or high-pressure gas to the left suspension pipeline A1 and / or the right suspension pipeline A2.

[0084] In this embodiment, the connecting control valve A is closed when the vehicle is traveling at high speed to prevent the vehicle from tilting when turning at high speed, and the connecting control valve A is opened when the vehicle is traveling at low speed in bad road conditions to prevent the vehicle body from swaying left and right due to bumps.

[0085] In an application scenario of the present embodiment, in any one of the two front suspension hydraulic cylinders 10, the first piston upper chamber 102 is connected to the first high-pressure gas tank 1001, a sixth control valve 503 is provided between the first high-pressure gas tank 1001 and the high-pressure air pump 70, the first high-pressure gas tank 1001 is connected to the piston upper chamber of the middle suspension cylinder 1003, the first piston lower chamber 103 is connected to the first return oil pressure tank 402, a first damping adjustment valve 401 is provided between the first piston lower chamber 103 and the first return oil pressure tank 402, a second electric control valve 403 is provided between the first return oil pressure tank 402 and the high-pressure oil pump 80, the piston lower chamber of the middle suspension cylinder 1003 is connected to the oil storage tank of the high-pressure oil pump 80, and a damping valve is provided between the piston lower chamber of the middle suspension cylinder 1003 and the oil storage tank of the high-pressure oil pump 80;

[0086] In any one of the two rear suspension hydraulic cylinders 20 mentioned above, the second piston upper chamber 202 is connected to a second high-pressure air tank 1002, a seventh electrically controlled valve 601 is provided between the second high-pressure air tank 1002 and the high-pressure air pump 70, the second piston lower chamber 203 is connected to a second return oil pressure tank 405, a second damping adjustment valve 406 is provided between the second piston lower chamber 203 and the second return oil pressure tank 405, and a third electrically controlled valve 404 is provided between the second return oil pressure tank 405 and the high-pressure oil pump 80.

[0087] In this application scenario, the three-axle suspension effect of six wheels on the left and right sides can be achieved by combining the high-pressure oil pump and high-pressure air pump with various pipelines and valves. In special road conditions, such as the left body roll, the switch connecting the control valve A and the left suspension pipeline A1 can also be used to add high-pressure gas to the left suspension pipeline A1, so that the piston in the left suspension pipeline A1 moves downward, and the body is raised to adjust the body roll caused by uneven roads. The adjustment method for the right body roll is similar.

[0088] Example 4

[0089] like Figure 4 As shown, the utility model provides a shock-absorbing suspension system, including a left suspension pipeline A1 and a right suspension pipeline A2; the left suspension pipeline A1 includes a front suspension hydraulic cylinder 10 and a rear suspension hydraulic cylinder 20 arranged in pairs, and two pairs are provided; the right suspension pipeline A2 includes a front suspension hydraulic cylinder 10 and a rear suspension hydraulic cylinder 20 arranged in pairs, and two pairs are provided; the left suspension pipeline A1 and the right suspension pipeline A2 are connected by a common oil and gas circuit, and the common oil and gas circuit is provided with a connection control valve A, and the connection control valve A is used to control the connection or closing of the common oil and gas circuit, thereby cutting off or connecting the left suspension pipeline A1 and the right suspension pipeline A2. A high-pressure air pump 70 and a high-pressure oil pump 80 are provided on the common oil and gas circuit, and are used to supply high-pressure oil or high-pressure gas to the left suspension pipeline A1 and / or the right suspension pipeline A2.

[0090] In this embodiment, the connecting control valve A is closed when the vehicle is traveling at high speed to prevent the vehicle from tilting when turning at high speed, and the connecting control valve A is opened when the vehicle is traveling at low speed in bad road conditions to prevent the vehicle body from swaying left and right due to bumps.

[0091] In an application scenario of the present embodiment, in one of the front suspension hydraulic cylinders 10 and the rear suspension hydraulic cylinders 20 arranged in pairs in the left suspension pipeline A1, the first piston upper chamber 102 is connected to the first high-pressure gas tank 1001, the second piston upper chamber 202 is connected to the first high-pressure gas tank 1001, the first piston upper chamber 102 and the second piston upper chamber 202 are connected in parallel to the first high-pressure gas tank 1001, and a sixth control valve 503 is provided between the first high-pressure gas tank 1001 and the high-pressure air pump 70; The first piston lower chamber 103 is connected to a first oil return pressure tank 402, the second piston lower chamber 203 is connected to a first oil return pressure tank 402, the first piston lower chamber 103 and the second piston lower chamber 203 are connected in parallel to the first oil return pressure tank 402, a damping adjustment valve is provided between the first piston lower chamber 103 and the first oil return pressure tank 402, and between the second piston lower chamber 203 and the first oil return pressure tank 402, and a second electric control valve 403 is provided between the first oil return pressure tank 402 and the high-pressure oil pump 80;

[0092] In the other front suspension hydraulic cylinder 10 and the rear suspension hydraulic cylinder 20 arranged in pairs in the left suspension pipeline A1, the first piston upper chamber 102 is connected to the second high-pressure gas storage tank 1002, the second piston upper chamber 202 is connected to the second high-pressure gas storage tank 1002, the first piston upper chamber 102 and the second piston upper chamber 202 are connected in parallel to the second high-pressure gas storage tank 1002, and the seventh electric control valve 601 is arranged between the second high-pressure gas storage tank 1002 and the high-pressure air pump 70; the first piston lower chamber 1 03 is connected with a second return oil pressure tank 405, the second piston lower chamber 203 is connected with a second return oil pressure tank 405, the first piston lower chamber 103 and the second piston lower chamber 203 are connected in parallel to the second return oil pressure tank 405, a damping adjustment valve is provided between the first piston lower chamber 103 and the second return oil pressure tank 405, between the second piston lower chamber 203 and the second return oil pressure tank 405, and between the second piston lower chamber 203 and the second return oil pressure tank 405, and a third electric control valve 404 is provided between the second return oil pressure tank 405 and the high-pressure oil pump 80;

[0093] The structure of the right suspension pipe A2 is the same as that of the left suspension pipe A1.

[0094] In this application scenario, the four-axle suspension effect of eight wheels on the left and right sides can be achieved by combining the high-pressure oil pump and the high-pressure air pump with various pipelines and valves. In special road conditions, such as the left body roll, the switch connecting the control valve A and the left suspension pipeline A1 can also be used to add high-pressure gas to the left suspension pipeline A1, so that the piston in the left suspension pipeline A1 moves downward, and the body is raised to adjust the body roll caused by uneven roads. The adjustment method for the right body roll is similar.

[0095] Preferably, in the left suspension pipeline A1 and the right suspension pipeline A2 of Example 2-4, by designing the sixth control valve 503 and the seventh electric control valve 601 in the connecting pipelines of the front and rear high-pressure gas tanks of the left suspension pipeline A1 and the right suspension pipeline A2, the sixth control valve 503 and the seventh electric control valve 601 are closed during emergency braking to reduce the excessive nodding phenomenon of the vehicle; they are kept in a normally open state during normal driving; for special circumstances, such as slopes with an up and down slope of more than 10°, the sixth control valve 503 and the seventh electric control valve 601 can also be manually closed.

[0096] Example 5

[0097] Based on the shock absorbing suspension system of the aforementioned embodiments 1-4, a method for using the shock absorbing suspension system is also provided, including:

[0098] Step S10, open the first electrically controlled valve 301 and close the fourth electrically controlled valve, start the high-pressure air pump 70 to supply air to the front suspension hydraulic cylinder 10 and the rear suspension hydraulic cylinder 20 respectively, so that the first piston 101 and the second piston 201 move downward; wherein the first piston 101 discharges the hydraulic oil and high-pressure air in the first piston lower chamber 103 to the first return oil pressure tank 402, and the second piston 201 discharges the hydraulic oil and high-pressure air in the second piston lower chamber 203 to the second return oil pressure tank 405;

[0099] Step S20, closing the first electrically controlled valve 301;

[0100] Step S3, open the second electrically controlled valve 403 and the third electrically controlled valve 404, start the high-pressure oil pump 80 to pressurize the first oil return pressure tank 402 and the second oil return pressure tank 405 respectively, so that the first piston 101 and the second piston 201 move upward; wherein, the hydraulic oil in the first oil return pressure tank 402 and the second oil return pressure tank 405 flows to the first piston lower chamber 103 and the second piston lower chamber 203 respectively, ensuring that the first piston lower chamber 103 and the second piston lower chamber 203 are filled with hydraulic oil;

[0101] Step S40 , closing the second electrically controlled valve 403 and the third electrically controlled valve 404 .

[0102] By using the method of this embodiment before loading goods or driving the vehicle, the high-pressure gas in the first piston lower chamber 103 and the second piston lower chamber 203 can be discharged to ensure that the first piston lower chamber 103 and the second piston lower chamber 203 are filled with hydraulic oil, so that the front suspension hydraulic cylinder 10 and the rear suspension hydraulic cylinder 20 have better load-bearing capacity, thereby solving the problem of unbalanced load-bearing capacity between the front suspension hydraulic cylinder 10 and the rear suspension hydraulic cylinder 20 caused by high-pressure gas.

[0103] In one application scenario of the present embodiment, the first oil return pressure tank 402 and the second oil return pressure tank 405 are both provided with a pressure relief valve. When the internal pressure is too high, part of the high-pressure gas can be discharged through the pressure relief valve to ensure the normal function of the first oil return pressure tank 402 and the second oil return pressure tank 405. The multiple electric control valves in the shock-absorbing suspension system remain in a normally closed state, and the electric control valves in the corresponding positions are opened only when the vehicle is running at a low speed and the shock absorption effect of the vehicle needs to be improved or the vehicle load capacity needs to be adjusted; when the vehicle is running at a high speed (such as a driving speed of 40km / h or above), the sixth electric control valve 503 and the seventh electric control valve 601 are closed to prevent the vehicle from tilting forward (nodding) due to sudden braking when the vehicle is running at high speed, thereby avoiding damage to the front of the vehicle.

[0104] In one embodiment, the method further includes detecting the pressure and hydraulic oil level in the front suspension hydraulic cylinder 10 and the rear suspension hydraulic cylinder 20 through the first sensor group, detecting the load balance of the vehicle through the second sensor group, and adjusting the vehicle posture or vehicle height to which the current shock absorbing suspension system is applied based on the detection data of the first sensor group and the second sensor group. For example, before the vehicle is started, the hydraulic oil level in the front suspension hydraulic cylinder 10 and the rear suspension hydraulic cylinder 20 is detected through the first sensor group. When the hydraulic oil level in the first piston lower chamber 103 and the second piston lower chamber 203 is low, the corresponding electric control valve and the high-pressure air pump 70 and the high-pressure oil pump 80 are started to ensure that the hydraulic oil in the first piston lower chamber 103 and the second piston lower chamber 203 is in a full state; and after confirming that the hydraulic oil is in a full state, the load of the vehicle is detected through the second sensor group, and the vehicle height or vehicle posture is adaptively adjusted by the application method of the shock absorbing suspension system of the aforementioned embodiments 1-4.

[0105] In this embodiment, the first sensor group includes at least a plurality of pressure sensors and a plurality of liquid level height sensors, and the plurality of pressure sensors and the plurality of liquid level height sensors are respectively arranged in the chambers of the front suspension hydraulic cylinder 10, the rear suspension hydraulic cylinder 20, the first return oil pressure tank 402 and the second return oil pressure tank 405; the second sensor group includes at least an acceleration sensor, a speed sensor and a height sensor, and the acceleration sensor, the speed sensor and the height sensor are symmetrically arranged in the front and rear or left and right directions of the vehicle.

[0106] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A shock absorbing suspension system, characterized in that: include: A front suspension hydraulic cylinder (10) is provided with a first piston (101), wherein the first piston (101) forms a first piston upper chamber (102) and a first piston lower chamber (103) in the front suspension hydraulic cylinder (10); A rear suspension hydraulic cylinder (20) is provided with a second piston (201), wherein the second piston (201) forms a second piston upper chamber (202) and a second piston lower chamber (203) in the rear suspension hydraulic cylinder (20); A first pipeline (30) connected to a first electrically controlled valve (301); The second pipeline (40) is connected to the first damping adjustment valve (401), the second electric control valve (403), the third electric control valve (404) and the second damping adjustment valve (406); the second pipeline (40) is provided with a first return oil pressure tank (402); the first return oil pressure tank (402) is respectively connected to the first damping adjustment valve (401) and the second electric control valve (403); the second pipeline (40) is provided with a second return oil pressure tank (405); the second return oil pressure tank (405) is respectively connected to the third electric control valve (404) and the second damping adjustment valve (406); the second return oil pressure tank (405) is connected to the second piston lower chamber (203); A third pipeline (50) is connected to the fourth electrically controlled valve (501) and the fifth electrically controlled valve (502), and the third pipeline (50) is provided with a fourth pipeline (60) connected thereto; a high-pressure air pump (70), the high-pressure air pump (70) being connected to the third pipeline (50) and the fourth pipeline (60) respectively; A high-pressure oil pump (80), wherein the high-pressure oil pump (80) is connected to the third pipeline (50) and the second pipeline (40) respectively.

2. A shock absorbing suspension system according to claim 1, characterized in that: The high-pressure air pump (70) is provided with a sixth electrically controlled valve (503) and a seventh electrically controlled valve (601) on pipelines communicating with the first oil return pressure tank (402) and the second oil return pressure tank (405), respectively; The second electrically controlled valve (403), the third electrically controlled valve (404) and the fifth electrically controlled valve (502) are maintained in a normally closed state, so that when the sixth electrically controlled valve (503) and the seventh electrically controlled valve (601) are opened, the high-pressure air pump (70) operates and provides high-pressure gas to the first return oil pressure tank (402) or the second return oil pressure tank (405).

3. A shock absorbing suspension system as claimed in claim 2, characterized in that: A second electrically controlled valve (403) and a third electrically controlled valve (404) are provided at the end of the second pipeline (40) that connects the first oil return pressure tank (402) and the second oil return pressure tank (405), and the second electrically controlled valve (403) and the third electrically controlled valve (404) are used to control the connection and disconnection between the first piston lower chamber (103) and the second piston lower chamber (203); The second electrically controlled valve (403) and the third electrically controlled valve (404) are kept in a normally open state.

4. A shock absorbing suspension system as claimed in claim 3, characterized in that: The third pipeline (50) is connected between the high-pressure oil pump (80) and the second pipeline (40), and a fourth electric-controlled valve (501) is provided on the third pipeline (50); The fourth electrically controlled valve (501) is kept in a normally closed state.

5. A shock absorbing suspension system as claimed in claim 4, characterized in that: A first damping adjustment valve (401) and a second damping adjustment valve (406) are provided in a pipeline connecting the first piston lower chamber (103) and the second piston (201); the first damping adjustment valve (401) is connected to the first piston lower chamber (103), and the second damping adjustment valve (406) is connected to the second piston lower chamber (203).

6. A shock absorbing suspension system as claimed in claim 1, characterized in that: A first electrically controlled valve (301) is arranged in the pipeline connecting the first piston upper chamber (102) and the second piston upper chamber (202), and the first pipeline (30) is connected between the fourth electrically controlled valve (501) and the fifth electrically controlled valve (502) on the third pipeline (50).

7. A shock absorbing suspension system as claimed in claim 1, characterized in that: The input end of the high-pressure oil pump (80) is connected to the output end of the hydraulic oil storage tank.

8. A shock absorbing suspension system as claimed in claim 1, characterized in that: The third pipeline (50) is connected to the first pipeline (30), the second pipeline (40) and the fourth pipeline (60).

9. A shock absorbing suspension system as claimed in claim 1, characterized in that: The tops of the first oil return pressure tank (402) and the second oil return pressure tank (405) are both provided with inlet and outlet valves, and the high-pressure air pump (70) delivers high-pressure gas from the tops of the first oil return pressure tank (402) or the second oil return pressure tank (405) through the inlet and outlet valves.

10. A vehicle suspension device, characterized in that: include: A vehicle frame and a shock-absorbing suspension system, wherein the shock-absorbing suspension system is mounted on the vehicle frame, and a piston push rod in the shock-absorbing suspension system is connected to the front and rear wheels respectively; Wherein, the shock absorbing suspension system can adopt the shock absorbing suspension system as described in any one of claims 1-9.

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