Suspension hydraulic lift damper mechanism

Abstract

The suspension hydraulic lifting damping mechanism of the present application is provided with an energy storage damping module, an oil pump, an accumulator and an oil tank outside the damper and matched with the damper, which can be used for adjusting the height of the vehicle body; meanwhile, two electromagnetic valves are designed in the energy storage damping module, which can be used for adjusting the damping force in the recovery and compression stroke of the damper. The present application separates the damping adjustment and the hydraulic lifting design, so that the lifting action area is no longer limited to the cross-sectional area of the piston rod, a larger diameter lifting piston or an independent lifting chamber can be used, the hydraulic lifting force is improved, the vehicle body lifting demand under full load and severe working conditions is met; moreover, the hydraulic lifting circuit is independently designed, the lifting chamber and the oil supply interface can adopt a larger flow area, which can effectively deal with the sudden road bumps or obstacles, and reduce the risk of chassis bottoming; in addition, the damping adjustment and the hydraulic lifting are independently controlled and do not interfere with each other, which is beneficial to fully exert the performance advantages of each other and improve the vehicle comfort and control stability.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, specifically relating to a suspension hydraulic lifting and damping mechanism. Background Technology

[0002] To accelerate the attenuation of vibrations in the chassis and body, and improve the smoothness and ride comfort of a vehicle, automotive chassis are typically equipped with a suspension system. Among these, semi-active suspension can adjust damping in real time, balancing ride comfort and handling stability. This overcomes the limitations of traditional passive suspension, which has fixed parameters and struggles to balance multiple performance requirements, and is gradually becoming the mainstream technology in passenger and commercial vehicle chassis. Building on this, if active vehicle height adjustment can be further implemented, the chassis can be lowered at high speeds to improve driving stability, optimize the overall drag coefficient, and reduce energy consumption. When encountering obstacles or complex road surfaces, the vehicle body can be actively raised to prevent chassis components from scraping or bottoming out, thus improving the vehicle's adaptability to various road conditions.

[0003] In existing technologies, some manufacturers have attempted to integrate damping adjustment and vehicle lifting functions into a single shock absorber, developing integrated hydraulic lifting shock absorbers. These shock absorbers have a compact structure, simplifying the overall suspension system architecture and effectively reducing the space occupied by the vehicle chassis. However, the effective bearing area of ​​such integrated shock absorbers during lifting is limited to the cross-sectional area of ​​the piston rod, which is constrained by the piston rod diameter and oil seal conditions, preventing its effective increase. This results in insufficient hydraulic lifting force when the vehicle needs to be lifted to cope with larger sprung loads or road impacts, failing to meet the effective lifting requirements under full-load or harsh conditions. Summary of the Invention

[0004] To overcome the aforementioned problems in the prior art, this invention provides a suspension hydraulic lifting damping mechanism that separates damping adjustment from hydraulic lifting. This design eliminates the limitation of the lifting action area on the piston rod cross-sectional area, allowing for the use of a larger diameter lifting piston or an independent lifting chamber. This increases the hydraulic lifting force, meeting the vehicle lifting requirements under full load and harsh conditions. Furthermore, the independently designed hydraulic lifting circuit allows for a larger flow area in the lifting chamber and oil supply interface, enabling vehicle lifting to be completed within milliseconds. This effectively addresses sudden road bumps or obstacles, reducing the risk of chassis bottoming out. In addition, the independent control and non-interference of damping adjustment and hydraulic lifting allow for full utilization of their respective performance advantages, improving overall vehicle comfort and handling stability. Moreover, the decoupling of the damping and lifting systems allows for independent selection and flexible arrangement based on performance requirements, facilitating modular design of the shock absorbers, reducing compatibility difficulties between different vehicle models, and simplifying subsequent maintenance, replacement, and technical upgrades.

[0005] The technical solution of this application is as follows:

[0006] A hydraulic suspension lifting and damping mechanism includes an energy storage damping module, a shock absorber, an A-type accumulator, an oil pump, and an oil tank. The energy storage damping module includes a valve seat. The valve seat has an A-type oil port, a B-type oil port, an A-type cavity, and a B-type cavity. A compression valve is located in the A-type cavity, and a reset valve is located in the B-type cavity. The A-type cavity is connected to the A-type oil port via an A-type solenoid valve, and the B-type cavity is connected to the A-type oil port via a B-type solenoid valve. An A-type accumulator is located at the A-type oil port. The B-type oil port is connected to both the A-type cavity and the B-type cavity. The components are connected, and a B-pipe connector is provided at the B-port. The shock absorber includes an oil reservoir and a piston rod. The lower end of the piston rod is provided with a piston that slides with the oil reservoir, dividing the inner cavity of the oil reservoir into two non-communicating chambers, A and B. Chamber A is connected to the B-port. The A accumulator is connected to chamber B and the oil pump outlet respectively through a three-way pipe connector. The oil pump inlet is connected to the oil tank. The oil pump, A solenoid valve, and B solenoid valve are respectively connected to the ECU signal.

[0007] Compared with existing technologies, the suspension hydraulic lifting damping mechanism of this invention, by setting an energy storage damping module, oil pump, accumulator, and oil tank outside the damper for use with the damper, can be used to adjust the vehicle height; at the same time, two solenoid valves are designed in the energy storage damping module to adjust the damping force during the recovery and compression strokes of the damper; this invention separates the damping adjustment from the hydraulic lifting design, so that the lifting area is no longer limited by the cross-sectional area of ​​the piston rod, and a larger diameter lifting piston or independent lifting chamber can be used, thereby increasing the hydraulic lifting force (several times the lifting force of existing solutions can be obtained under the same hydraulic pressure), meeting the vehicle lifting requirements under full load and harsh working conditions; and the hydraulic lifting... The lift circuit is independently designed, allowing for a larger flow area in the lifting chamber and oil supply interface. This enables the vehicle body to be lifted within milliseconds, effectively addressing sudden road bumps or obstacles and reducing the risk of chassis bottoming out. Furthermore, damping adjustment and hydraulic lifting are independently controlled, ensuring that damping adjustment is no longer affected by the lifting action and that the damping force remains stable during lifting. Simultaneously, damping adjustment does not interfere with the vehicle height maintenance accuracy, thus facilitating the full performance of the semi-active suspension. Moreover, the decoupling of the damping and lifting systems allows for independent selection and flexible arrangement based on performance requirements, promoting modular design of the shock absorbers, reducing compatibility difficulties between different vehicle models, and facilitating subsequent maintenance, replacement, and technical upgrades.

[0008] As an optimization, in the aforementioned hydraulic lifting and damping mechanism for the suspension, the piston rod is hollow and has an opening on its side, allowing chamber A to communicate with the inner cavity of the piston rod; an A connector is provided at the top opening of the piston rod; the A connector and the B connector are connected via an oil pipe. Furthermore, a C connector is provided at the bottom of chamber B; the C connector is connected to a tee pipe connector via an oil pipe. This design facilitates assembly and implementation.

[0009] As an optimization, in the aforementioned suspension hydraulic lifting and damping mechanism, cavity A and cavity B are distributed in parallel and connected by flow channel C; the oil port B is located on the side of cavity A or cavity B; cavity A has an A receiving groove above it for installing solenoid valve A; cavity B has a B receiving groove above it for installing solenoid valve B. Furthermore, cavity A is connected to the outlet of solenoid valve A through flow channel A, and cavity B is connected to the inlet of solenoid valve B through flow channel B; the oil port A is connected to the inlet of solenoid valve A and the outlet of solenoid valve B through T-shaped flow channels. In this configuration, the components are arranged compactly and the space allocation is reasonable, which helps simplify the overall structure of the energy storage damping module, thereby reducing the chassis space occupied during assembly.

[0010] Furthermore, cavity A is sealed with an A fixing bolt, and cavity B is sealed with a B fixing bolt. The compression valve is fitted over the A mounting post at the end of the A fixing bolt and secured with a nut. The recovery valve is fitted over the B mounting post at the end of the B fixing bolt and secured with a nut. This design simplifies the installation structure and reduces implementation difficulty.

[0011] As an optimization, in the aforementioned hydraulic lifting and damping mechanism for suspension, the upper end of the piston rod is provided with an upper support for connecting to the vehicle body; the lower end of the oil reservoir is provided with a lower bracket for connecting to the vehicle's lower control arm. Thus, the shock absorber can be fixed between the vehicle body and the wheel via the upper support and the lower bracket.

[0012] As an optimization, in the aforementioned suspension hydraulic lifting and damping mechanism, a spring seat is provided at the upper end of the oil reservoir; a spring is provided between the spring seat and the upper support. In this invention, the spring and the damper are integrated, resulting in a compact overall structure. This eliminates the need for a separate upper spring support, connecting mechanism, and some additional support structures, which helps save installation space and reduce assembly costs.

[0013] As an optimization, in the aforementioned hydraulic lifting and damping mechanism for the suspension, accumulators A and B are diaphragm-type accumulators. Internally, they are divided into a gas chamber and a liquid chamber by a diaphragm. The gas chamber is filled with high-pressure gas, and the liquid chamber is filled with oil. Diaphragm-type accumulators, by separating the high-pressure gas and oil through a diaphragm, exhibit low deformation resistance and fast response speed. Furthermore, they are small in size and lightweight, support installation at any angle, and have strong layout adaptability, meeting the arrangement requirements within the confined space of the vehicle's suspension.

[0014] As an optimization, when the aforementioned hydraulic suspension lifting and damping mechanism is working, the ECU controls the oil pump to open according to the actual working conditions. The oil pump draws oil from the oil tank into chamber B to push the piston rod outward to lift the vehicle body, or draws oil from chamber B to retract the piston rod inward to lower the vehicle body, thus achieving active adjustment of the vehicle height. The ECU controls the energizing current of solenoid valve A or solenoid valve B to adjust the opening of solenoid valve A or solenoid valve B, thereby achieving active adjustment of the damping force in the compression stroke or recovery stroke of the shock absorber. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the suspension hydraulic lifting and damping mechanism in the embodiments of this application;

[0016] Figure 2 This is a schematic diagram of the energy storage damping module in the embodiments of this application;

[0017] Figure 3 This is a schematic diagram of the vibration damper in the embodiments of this application;

[0018] Figure 4 This is an assembly diagram of the accumulator and the tee pipe joint in an embodiment of this application;

[0019] Figure 5 This is a diagram showing the flow of oil inside the energy storage damping module during the compression stroke of the shock absorber.

[0020] Figure 6 This is a diagram showing the flow of oil inside the energy storage damping module during the shock absorber's recovery stroke.

[0021] The labels in the attached diagram are as follows: 1-energy storage damping module, 11-valve seat, 111-cavity A, 112-cavity B, 113-accommodating tank A, 114-accommodating tank B, 115-flow channel A, 116-flow channel B, 117-T-type flow channel, 118-flow channel C, 12-compression valve, 13-recovery valve, 14-solenoid valve A, 15-solenoid valve B, 16-accumulator A, 17-pipeline connector B, 18- A-Fixing bolt, 19-B-Fixing bolt; 2-Shock absorber, 21-Oil reservoir, 22-Piston rod, 221-Through hole, 23-Piston, 24-A-pipe connector, 25-C-pipe connector, 26-Upper support, 27-Lower support, 28-Spring seat, 29-Spring, 201-A-chamber, 202-B-chamber; 3-B-Accumulator; 4-Oil pump; 5-Oil tank; 6-T-connector; 7-Oil pipe. Detailed Implementation

[0022] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. Contents not described in detail in the following embodiments are all common knowledge in the art.

[0023] Example:

[0024] See Figures 1 to 4 In this embodiment, the suspension hydraulic lifting and damping mechanism includes an energy storage damping module 1, a shock absorber 2, an accumulator B 3, an oil pump 4, and an oil tank 5. The energy storage damping module 1 includes a valve seat 11. The valve seat 11 is provided with an A oil port, a B oil port, an A cavity 111, and a B cavity 112. A compression valve 12 is provided in the A cavity 111, and a reset valve 13 is provided in the B cavity 112 (both the compression valve 12 and the reset valve 13 are one-way valves and are interference-fitted with the valve seat 11). The A cavity 111 is connected to the A oil port through an A solenoid valve 14. Cavity B 112 is connected to port A via solenoid valve B 15; accumulator A 16 is sealed at port A; port B is connected to both cavity A 111 and cavity B 112, and pipe connector B 17 is sealed at port B; the damper 2 includes an oil reservoir 21 and a piston rod 22; the lower end of the piston rod 22 is provided with a piston 23 that slides with the oil reservoir 21, dividing the inner cavity of the oil reservoir 21 into two non-communicating chambers, A chamber 201 and B chamber 202; the piston rod 22 is hollow, and an opening is provided on the side of the piston rod 22 ( Figure 3 The piston rod 22 has a through hole 221, which connects chamber A 201 to the inner cavity of piston rod 22. A pipe connector 24 is provided at the top opening of piston rod 22. Pipe connector 24 and pipe connector 17 are connected via oil pipe 7 (thus connecting chamber A 201 to oil port 112). A three-way pipe connector 6 is sealed at the bottom oil inlet of accumulator B 3. A pipe connector 25 is provided at the bottom of chamber B 202 (an oil outlet is provided at the bottom of oil reservoir 21, and pipe connector 25 is sealed at the outlet). One end of the three-way pipe connector 6 is connected to pipe connector 25 via oil pipe 7, and the other end is connected to the outlet of oil pump 4 via oil pipe 7. The inlet of oil pump 4 is connected to oil tank 5. Oil pump 4, solenoid valve A 14, and solenoid valve B 15 are respectively connected to the ECU signal.

[0025] See Figure 2In this embodiment, cavity A 111 and cavity B 112 are arranged in parallel and connected by flow channel C 118; the oil port B is located on the side of cavity B 112; cavity A accommodating groove A 113 is provided above cavity A 111 for installing solenoid valve A 14; cavity B accommodating groove B 114 is provided above cavity B 112 for installing solenoid valve B 15; cavity A 111 is connected to the outlet of solenoid valve A 14 through flow channel A 115, and cavity B 112 is connected to the inlet of solenoid valve B 15 through flow channel B 116; the oil port A is connected to the inlet of solenoid valve A 14 and the outlet of solenoid valve B 15 through T-shaped flow channel 117. In this configuration, the components of the energy storage damping module are arranged compactly and the space allocation is reasonable, which helps to reduce the chassis space occupied during assembly.

[0026] In this embodiment, an A fixing bolt 18 is sealed and connected inside cavity A 113, and a B fixing bolt 19 is sealed and connected inside cavity B 112. The compression valve 13 is sleeved on the A mounting post at the end of the A fixing bolt 18 and locked in place with a nut. The recovery valve 15 is sleeved on the B mounting post at the end of the B fixing bolt 19 and locked in place with a nut. This design results in a simple installation structure and low implementation difficulty. Mounting holes are provided on the outer end faces of the A fixing bolt 18 and the B fixing bolt 19, which can be used to fix the valve seat 11 to the vehicle.

[0027] See Figure 3 In this embodiment, the upper end of the piston rod 22 is provided with an upper support member 26 for connecting to the vehicle body; the lower end of the oil reservoir 21 is provided with a lower bracket 27 for connecting to the vehicle's lower control arm. Thus, the shock absorber 2 can be fixed between the vehicle body and the wheel via the upper support member 26 and the lower bracket 27, making assembly convenient.

[0028] In this embodiment, a spring seat 28 is provided at the upper end of the oil reservoir 21; a spring 29 is provided between the spring seat 28 and the upper support member 26. Integrating the spring 29 with the shock absorber 2 results in a compact overall structure, which helps save installation space and reduce assembly costs.

[0029] In this embodiment, both accumulator A 12 and accumulator B 3 are diaphragm accumulators. The interior is divided into a gas chamber and a liquid chamber by a diaphragm (which can be made of fluororubber and has a sealing rating of IP6K9K). The volume can be designed to be 1-2L depending on the vehicle load. The gas chamber is filled with high-pressure gas (such as high-pressure nitrogen), and the liquid chamber is filled with oil.

[0030] In this embodiment, the suspension hydraulic lifting and damping mechanism uses an energy storage damping module 1, an energy storage accumulator 3, an oil pump 4, and an oil tank 5 installed outside the shock absorber 2 to adjust the vehicle height. At the same time, two solenoid valves are installed in the energy storage damping module 1 to adjust the damping force in the recovery and compression strokes of the shock absorber, so that the damping adjustment and hydraulic lifting are designed separately and do not interfere with each other, resulting in good overall vehicle comfort and handling stability.

[0031] In practical implementation, the hydraulic suspension lifting and damping mechanism can be used in conjunction with a height sensor to adjust the vehicle height; the height sensor is used to monitor the vehicle height; the energy storage damping module 1, the shock absorber 2, and the B accumulator 3 are all filled with oil. During vehicle operation, the ECU controls the oil pump 4 to open according to the actual working conditions, drawing oil from the oil tank 5 into the B chamber 202 to push the piston rod 22 outward to lift the vehicle body, or drawing oil from the B chamber 202 to retract the piston rod 22 inward to lower the vehicle body, thus achieving active adjustment of the vehicle height; its core principle lies in changing the volume of oil in the B chamber 202.

[0032] ① The ECU issues a height increase command, controlling the oil pump 4 to open, thus connecting the shock absorber 2 to the oil tank 5. The oil pump 4 rotates forward, drawing oil from the oil tank 5 and pumping it into the B chamber 202 of the shock absorber 2 through the oil pipe 7, the tee connector 6, and the C-pipe connector 25. At this time, the volume of oil in the B chamber 202 increases, pushing the piston rod 22 out of the oil reservoir 21 (correspondingly, the volume of oil in the A chamber 201 decreases and is stored in the A accumulator). The lifting force applied to the vehicle body by the piston rod 22 increases, raising the vehicle height. When the height sensor detects that the vehicle height has reached the set height, it sends a signal to the ECU. The ECU then issues a command to shut down the oil pump 4, disconnecting the shock absorber 2 from the oil tank 5, and maintaining the vehicle height.

[0033] ② The ECU issues a height reduction command, controlling the oil pump 4 to open, thus connecting the shock absorber 2 to the oil tank 5. The oil pump 4 reverses direction, drawing oil from the B chamber 202 of the shock absorber 2 through the oil pipe 7, the tee connector 6, and the C-pipe connector 25, and pumping it back to the oil tank 5. At this time, the volume of oil in the B chamber 202 decreases, and the piston rod 22 is pushed back into the oil reservoir 21 under the weight of the vehicle body, causing the vehicle height to decrease. When the height sensor detects that the vehicle height has reached the set height, it sends a signal to the ECU. The ECU then issues a command to shut down the oil pump 4, disconnecting the shock absorber 2 from the oil tank 5, and maintaining the vehicle height.

[0034] During vehicle operation, the ECU controls the current flowing through solenoid valve A 14 to adjust its opening, thereby regulating the damping force during the shock absorber's compression stroke; alternatively, the ECU controls the current flowing through solenoid valve B 15 to adjust its opening, thus regulating the damping force during the shock absorber's recovery stroke. Details are as follows.

[0035] ① During the compression stroke of the shock absorber (piston rod 22 moves inward relative to the reservoir 21), the volume of chamber B 202 is compressed. The oil in chamber B 202 flows out from pipe joint 25, passes through oil pipe 7 and tee pipe joint 6, and flows into accumulator B 3. At this time, the high-pressure gas in accumulator B 3 is compressed, increasing the volume of its liquid chamber for storing oil. Simultaneously, the volume of chamber A 201 increases, and the oil in accumulator A 12, under the pressure of the high-pressure gas, flows from port A into T-channel 117 and into the inlet at the bottom of solenoid valve A 14, flowing out from its side outlet (dampening force is adjusted by changing the current of solenoid valve A 14 during this process). It then flows through channel A 115 into chamber A 111, then through compression valve 12, and through channel C 118 into chamber B 112, before flowing out from pipe joint 17 (see...). Figure 5 The oil flows through the oil pipe 7 and the A pipe joint 24 in sequence, enters the inner cavity of the shock absorber piston rod 22, and finally flows into the A chamber 201 from the through hole 221 on the side of the piston rod 22 to replenish the oil.

[0036] ② During the shock absorber's recovery stroke (piston rod 22 moves outward relative to reservoir 21), the volume of chamber A 201 is compressed. The oil in chamber A 201 enters the inner cavity of piston rod 22 through the through hole 221 on the side of piston rod 22, then flows out from pipe A connector 24, passes through oil pipe 7 and pipe B connector 17, enters chamber B 112 of valve seat 11, then flows through recovery valve 13, through flow channel B 116, flows in from the inlet at the bottom of solenoid valve B 15, and flows out from the outlet on its side (dampening force is adjusted by changing the energizing current of solenoid valve B 15 during this process), and finally flows into accumulator A 16 through T-shaped flow channel 117 (see...). Figure 6 At this time, the high-pressure gas in accumulator A 16 is compressed, increasing the volume of its liquid chamber for storing oil; at the same time, the volume of chamber B 202 increases, and the oil in accumulator B 3 is subjected to the pressure of the high-pressure gas, flowing out from the three-way pipe joint 6, and passing through oil pipe 7 and C pipe joint 25 in sequence, entering chamber B 202 for oil replenishment.

[0037] The foregoing general description of the invention and its specific embodiments should not be construed as a limitation on the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A suspension hydraulic lifting and damping mechanism, characterized in that: It includes an energy storage damping module (1), a shock absorber (2), a B-type energy storage device (3), an oil pump (4), and an oil tank (5); The energy storage damping module (1) includes a valve seat (11); the valve seat (11) is provided with an A port, a B port, an A cavity (111), and a B cavity (112); the A cavity (111) is provided with a compression valve (12), and the B cavity (112) is provided with a recovery valve (13); the A cavity (111) is connected to the A port through an A solenoid valve (14), and the B cavity (112) is connected to the A port through a B solenoid valve (15); an A accumulator (16) is provided at the A port; the B port is connected to the A cavity (111) and the B cavity (112), and a B pipe connector (17) is provided at the B port. The damper (2) includes an oil reservoir (21) and a piston rod (22); the lower end of the piston rod (22) is provided with a piston (23) that slides with the oil reservoir (21), dividing the inner cavity of the oil reservoir (21) into a non-communicating chamber A (201) and a chamber B (202). The A chamber (201) is connected to the B pipe connector (17); the B accumulator (3) is connected to the B chamber (202) and the oil pump (4) outlet respectively through the tee pipe connector (6); the oil pump (4) inlet is connected to the oil tank (5); the oil pump (4), A solenoid valve (14) and B solenoid valve (15) are respectively connected to the ECU signal.

2. The suspension hydraulic lifting and damping mechanism according to claim 1, characterized in that: The piston rod (22) is hollow and has a hole on its side, so that the A chamber (201) is connected to the inner cavity of the piston rod (22); the top opening of the piston rod (22) is provided with an A pipe connector (24); the A pipe connector (24) and the B pipe connector (17) are connected by an oil pipe (7).

3. The suspension hydraulic lifting and damping mechanism according to claim 2, characterized in that: The bottom of chamber B (202) is provided with a C pipe joint (25); the C pipe joint (25) is connected to the tee pipe joint (6) through an oil pipe (7).

4. The suspension hydraulic lifting and damping mechanism according to claim 1, characterized in that: The A cavity (111) and B cavity (112) are distributed in parallel and are connected by the C flow channel (118); the B oil port is located on the side of the A cavity (111) or the B cavity (112); the A cavity (111) is provided with an A receiving groove (113) above it for installing the A solenoid valve (14); the B cavity (112) is provided with a B receiving groove (114) above it for installing the B solenoid valve (15).

5. The suspension hydraulic lifting and damping mechanism according to claim 4, characterized in that: The A cavity (111) is connected to the outlet of the A solenoid valve (14) through the A flow channel (115), and the B cavity (112) is connected to the inlet of the B solenoid valve (15) through the B flow channel (116); the A oil port is connected to the inlet of the A solenoid valve (14) and the outlet of the B solenoid valve (15) through the T-shaped flow channel (117).

6. The suspension hydraulic lifting and damping mechanism according to claim 5, characterized in that: The A cavity (111) is sealed with an A fixing bolt (18), and the B cavity (112) is sealed with a B fixing bolt (19). The compression valve (12) is sleeved on the A mounting post at the end of the A fixing bolt (18) and locked with a nut. The recovery valve (13) is sleeved on the B mounting post at the end of the B fixing bolt (19) and locked with a nut.

7. The suspension hydraulic lifting and damping mechanism according to claim 1, characterized in that: The piston rod (22) is provided with an upper support (26) at its upper end for connecting to the vehicle body; the oil reservoir (21) is provided with a lower bracket (27) at its lower end for connecting to the vehicle lower control arm.

8. The suspension hydraulic lifting and damping mechanism according to claim 7, characterized in that: The upper end of the oil reservoir (21) is provided with a spring seat (28); a spring (29) is provided between the spring seat (28) and the upper support member (26).

9. The suspension hydraulic lifting and damping mechanism according to claim 1, characterized in that: Both accumulator A (16) and accumulator B (3) are diaphragm accumulators, which are divided into a gas chamber and a liquid chamber by a diaphragm. The gas chamber is filled with high-pressure gas and the liquid chamber is filled with oil.

10. The suspension hydraulic lifting and damping mechanism according to claim 1, characterized in that: During operation, the ECU controls the oil pump (4) to open according to the actual working conditions. The oil pump (4) draws oil from the oil tank (5) into the B chamber (202) to push the piston rod (22) to move outward and lift the vehicle body, or draws oil from the B chamber (202) to retract the piston rod (22) inward and lower the vehicle body, thus realizing the active adjustment of the vehicle body height. The ECU controls the energizing current of the A solenoid valve (14) or the B solenoid valve (15) to adjust the opening of the A solenoid valve (14) or the B solenoid valve (15), thus realizing the active adjustment of the damping force in the compression stroke or the damping force in the recovery stroke of the shock absorber.

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