A new type of double cylinder full active hydraulic suspension actuator

Abstract

The utility model discloses a novel double-barrel type full active hydraulic suspension actuator, and the shock absorber comprises an oil storage cylinder, a working cylinder concentrically located in the oil storage cylinder and a piston rod; a hydraulic valve block is installed at the lower end of the oil storage cylinder, the hydraulic valve block is in sealing connection with the lower end of the working cylinder through interference or sealing ring axial sealing cooperation, the oil passage of the hydraulic valve block is connected with the upper cavity and the lower cavity to form an integrated whole, and the hydraulic valve block is provided with an accumulator, a recovery electromagnetic valve, a compression electromagnetic valve and an oil injection valve block. The utility model has the advantages of scientific and reasonable design, low production cost, reduced intermediate cylinder chamber compared with the three-cylinder structure, simpler structure, simpler assembly, lower cost, better sealing effect of the upper and lower parts of the working cylinder through interference cooperation or sealing ring cooperation with the guider and the valve block, longer service life of the actuator, simpler and more efficient oil movement, simpler and faster assembly, greatly optimized production line production time and good social and economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of active suspension technology. Specifically, it is a novel twin-tube fully active hydraulic suspension actuator. Background Technology

[0002] Fully active actuators are a novel automotive shock absorber technology. They utilize a hydraulic pump to adjust the pressure in the upper and lower chambers, achieving a wider adjustment bandwidth and enabling vehicles to adapt to a wider range of road conditions, thus improving ride comfort and handling stability. However, existing fully active actuators occupy significant chassis space, hindering overall vehicle layout and resulting in high energy consumption. While the applicant's prior patent 202411492059.7 – A Novel Dual-Solenoid Valve Fully Active Suspension Actuator – optimizes space and reduces chassis space occupation by centrally configuring components such as solenoid valves, its shock absorber structure is relatively complex, with a tortuous oil flow path. This not only affects the response speed and control accuracy of damping force adjustment but may also increase energy consumption due to oil turbulence and localized pressure loss. Therefore, further improvements and innovations in its structure and design are needed. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a novel dual-cylinder fully active hydraulic suspension actuator, which can effectively solve the problems of complex structure and difficult assembly of shock absorbers.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A novel twin-cylinder fully active hydraulic suspension actuator includes a shock absorber and a hydraulic valve block. The shock absorber includes an oil reservoir, a working cylinder concentrically located within the oil reservoir, and a piston rod. The piston on the piston rod divides the working cylinder into an upper chamber and a lower chamber. The upper chamber of the working cylinder is connected to the oil reservoir chamber through a flow hole. The hydraulic valve block is mounted at the lower end of the oil reservoir chamber and is sealed to the lower end of the working cylinder through an interference fit or a sealing ring. The oil passage of the hydraulic valve block is integrated with the upper and lower chambers of the working cylinder. The hydraulic valve block is equipped with an accumulator, a reset solenoid valve, a compression solenoid valve, and an oil injection valve block.

[0006] Preferably, the hydraulic valve block has an oil flow channel. The upper chamber of the working cylinder is connected to the reset solenoid valve and the oil injection valve block through the oil flow channel. The lower chamber of the working cylinder is connected to the compression solenoid valve and the oil injection valve block through the oil flow channel. The oil injection valve block has an oil passage hole. An oil pump pumps oil to the upper and lower chambers. The reset solenoid valve and the compression solenoid valve are connected to the oil end of the accumulator through the oil passage of the valve block.

[0007] Preferably, the upper end of the working cylinder is sealed to the guide via interference fit or sealing ring, and the piston rod extends out of the damper through the guide and the oil reservoir.

[0008] Preferably, the piston rod is located inside the working cylinder, with one end extending out of the shock absorber through the working cylinder and the oil reservoir in sequence.

[0009] The technical solution of this utility model has achieved the following beneficial technical effects:

[0010] This utility model features a scientifically sound and reasonable design with low production costs. Compared to the three-cylinder structure, the double-cylinder actuator reduces the intermediate cylinder chamber, making it simpler than most structures on the market. It is also easier to assemble and has lower costs. The upper and lower parts of the working cylinder can be fitted with the guide and valve block through interference fit or sealing rings, resulting in better sealing, less damage, and a longer actuator life. The hydraulic movement is simpler and more efficient, and assembly is also simpler and faster, greatly optimizing production line time and providing good social and economic benefits. Attached Figure Description

[0011] Figure 1 Cross-sectional view of the structure of this utility model Figure 1 ;

[0012] Figure 2 Cross-sectional view of the structure of this utility model Figure 2 ;

[0013] Figure 3 This is a schematic diagram of the hydraulic structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the oil passage of this utility model;

[0015] Figure 5 This is a schematic diagram of the active lifting function of this utility model;

[0016] Figure 6 This is a schematic diagram of the active descent function of this utility model;

[0017] Figure 7 This is a schematic diagram of the fully active lifting hydraulic principle of this utility model;

[0018] Figure 8 This is a schematic diagram of the fully automatic lowering hydraulic principle of this utility model;

[0019] Figure 9 This is a schematic diagram of the hydraulic principle of the ADS mode restored in this utility model;

[0020] Figure 10 This is a hydraulic schematic diagram of the compression ADS mode of this utility model;

[0021] Figure 11 This is a schematic diagram of the principle of restoring the active ADS mode of this utility model;

[0022] Figure 12 This is a schematic diagram of the active ADS compression mode of this utility model;

[0023] Figure 13 This is a schematic diagram of the energy recovery mode of this utility model;

[0024] Figure 14 This is a schematic diagram of the hydraulic principle for energy recovery in this utility model.

[0025] The reference numerals in the figure are as follows: 1-Hydraulic valve block; 2-Reset solenoid valve; 3-Compression solenoid valve; 4-Accumulator; 5-Piston rod; 6-Working cylinder; 61-Upper chamber of working cylinder; 62-Lower chamber of working cylinder; 7-Oil reservoir; 8-Oil seal; 9-Guide; 10-Oil injection valve block; 11-Oil; 12-Piston; 13-Power pump; 14-First check valve; 15-Second check valve. Detailed Implementation

[0026] The present invention is illustrated by the following embodiments.

[0027] like Figure 1 , 2 As shown, a novel twin-cylinder fully active hydraulic suspension actuator includes a shock absorber comprising an oil reservoir 7, a working cylinder 6 concentrically located within the oil reservoir 7, and a piston rod 5. The piston rod 5 is located within the working cylinder 6, with one end extending out of the shock absorber through the working cylinder 6 and the oil reservoir 7 in sequence. The piston 12 on the piston rod 5 divides the working cylinder 6 into an upper chamber 61 and a lower chamber 62. The upper chamber 61 is connected to the oil reservoir 7 through a flow hole. A hydraulic valve block 1 is mounted at the lower end of the chamber of the oil reservoir 7. The hydraulic valve block 1 is sealed to the lower end of the working cylinder 6 through an interference fit or a sealing ring, connecting the oil passage of the hydraulic valve block 1 to the upper chamber 61 and the lower chamber 62 of the working cylinder as a single unit. The hydraulic valve block 1 is equipped with an accumulator 4, a reset solenoid valve 2, a compression solenoid valve 3, and an oil injection valve block 10.

[0028] like Figure 4 As shown, the hydraulic valve block 1 has an oil flow channel. The upper chamber 61 of the working cylinder is connected to the reset solenoid valve 2 and the oil injection valve block 10 through the oil flow channel. The lower chamber 62 of the working cylinder is connected to the compression solenoid valve 3 and the oil injection valve block 10 through the oil flow channel. The oil injection valve block 10 has an oil passage hole. The oil pump pumps oil to the upper chamber 61 and the lower chamber 62 of the working cylinder. The reset solenoid valve 2 and the compression solenoid valve 3 are connected to the oil end of the accumulator 4 through the valve block oil passage.

[0029] It should be noted that this utility model adopts a brand-new double-cylinder structure, which is simple to assemble and has a better sealing effect. The chamber is divided into an oil storage cylinder chamber and a working cylinder chamber by the working cylinder 6. The upper chamber 61 of the working cylinder is connected to the oil storage cylinder 7 through a flow hole. Therefore, the upper chamber 61 of the working cylinder and the oil storage cylinder 7 can be simplified as one unit and referred to as the upper chamber 61 of the working cylinder.

[0030] In this embodiment, the upper end of the working cylinder 6 is sealed to the guide 9 by interference fit or sealing ring, the piston rod 5 passes through the guide 9 and the oil reservoir 7 and extends out of the damper, and the oil reservoir 7 is equipped with an oil seal 8 to prevent oil from flowing out of the damper.

[0031] like Figure 4 As shown, the accumulator 4 has high-pressure gas on one side and oil on the other. The oil end is connected to the recovery solenoid valve and the compression solenoid valve respectively. When the piston rod 5 moves up and down, the oil is supplied to the upper and lower chambers of the working cylinder through the oil passage hole via the recovery solenoid valve 2 and the compression solenoid valve 3.

[0032] In practical operation, the oil injection valve block 10 is provided with a compression oil pipe joint and a recovery oil pipe joint, and the two oil pipe joints are respectively connected to the two ends of the power pump 13.

[0033] In fully active mode, oil is input and output from an external oil pump through the oil injection connector to control the oil volume, causing the piston rod 5 to move up and down to achieve lifting and compression movements, thereby controlling the pressure in the upper and lower chambers of the working cylinder and generating the required damping forces at each stage. In ADS mode, the piston rod 5 moves up and down to generate restoring and compression damping forces.

[0034] When piston rod 5 moves upward, in fully active mode, the external oil pump pressurizes the lower chamber of working cylinder 6 through oil injection valve block 10, increasing the amount of oil in the lower chamber, thereby lifting piston rod 5 and achieving fully active lifting adjustment. In ADS mode, the reset solenoid valve 2 controls the opening of the reset valve passage to achieve damping adjustment.

[0035] When piston rod 5 moves downward, in fully active mode, the external oil pump delivers oil to the oil reservoir 7 through the oil injection valve block 10. The oil flows into the working cylinder 6 through the flow hole, increasing the oil level in the upper chamber 61 of the working cylinder, which in turn pushes piston rod 5 downward, thus achieving fully active compression regulation. In ADS mode, the compression solenoid valve 3 controls the opening of the compression valve to achieve damping regulation.

[0036] The accumulator 4 is divided into two chambers: a gas chamber and an oil chamber. The gas chamber is filled with high-pressure gas, and there is an oil passage between the oil chamber and the hydraulic valve block 1, which can compensate the actuator with oil as needed.

[0037] The main functions of this utility model include fully active mode, active ADS mode, ADS mode, and energy recovery mode. The specific operating conditions are as follows:

[0038] ① Fully Active Mode: such as Figure 5 , 7As shown, the pressurized oil from the power pump 13 enters the upper and lower chambers of the working cylinder 6 through the oil passage of the oil injection valve block 10, realizing the lifting and lowering function of the piston rod 5. During fully active lifting, when oil is injected into the lower chamber 62 of the working cylinder, the piston rod 5 is lifted, and a small portion of the pumped oil enters the accumulator 4 through the return channel of the compression solenoid valve 3. The accumulator 4 replenishes oil to the upper chamber 61 of the working cylinder through the first one-way valve 14 of the reset solenoid valve 2, and then flows back to the oil pump through the flow hole of the upper chamber 61 of the working cylinder. Figure 6 , 8 As shown, during fully active descent, oil is injected into the upper chamber 61 of the working cylinder, and a small portion of the pumped oil flows into the accumulator 4 through the return channel of the reset solenoid valve 2. The oil in the lower chamber 62 of the working cylinder flows back to the oil pump through the oil passage.

[0039] ②ADS mode: such as Figure 9 As shown, when the oil pump is shut off, the actuator performs the ADS function, restoring the stroke. Oil flows from the upper chamber 61 of the working cylinder through the reset solenoid valve 2, and from the accumulator 4 through the second check valve 15 of the compression solenoid valve 3 into the lower chamber 62 of the working cylinder; as... Figure 9 As shown, during the compression stroke, the oil flows from the lower chamber 62 of the working cylinder through the compression solenoid valve 3, and from the accumulator 4 through the first check valve 14 of the reset solenoid valve 2 into the upper chamber 61 of the working cylinder.

[0040] ③ Active ADS mode: such as Figure 11 , 12 As shown, based on the ADS mode, the oil pump increases the pressure in the upper and lower chambers of the working cylinder by pressurizing the upper and lower chambers, thereby increasing the adjustment bandwidth. Figure 11 As shown, when the recovery mode requires high damping, oil is pumped into the upper chamber 61 of the working cylinder to increase the pressure difference between the upper and lower chambers of the working cylinder 6; when low damping is required, oil is pumped into the lower chamber 62 of the working cylinder to decrease the pressure difference between the upper and lower chambers of the working cylinder 6. Figure 12 As shown, when the compression mode requires large damping, oil is pumped into the lower chamber 62 of the working cylinder to increase the pressure difference between the upper and lower chambers of the working cylinder 6; when small damping is required, oil is pumped into the upper chamber 61 of the working cylinder to decrease the pressure difference between the upper and lower chambers of the working cylinder 6.

[0041] ④ Energy recovery mode: such as Figure 13 , 14 As shown, when the piston rod 5 moves up and down, the oil flows through the oil passage of the oil injection valve block 10 and drives the engine.

[0042] In specific implementations of this utility model, in addition to the above-mentioned components, the actuator can also be configured with a hydraulic buffer device according to performance requirements, and the positions, arrangements and angles of the recovery solenoid valve assembly, compression solenoid valve assembly, oil injection valve block assembly and accumulator assembly can be flexibly arranged according to the layout.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A novel twin-cylinder fully active hydraulic suspension actuator, comprising a shock absorber and a hydraulic valve block, characterized in that, The shock absorber includes an oil reservoir (7), a working cylinder (6) concentrically located inside the oil reservoir (7), and a piston rod (5). The piston (12) on the piston rod (5) divides the working cylinder (6) into an upper chamber (61) and a lower chamber (62). The upper chamber (61) of the working cylinder is connected to the chamber of the oil reservoir (7) through a flow hole. The hydraulic valve block (1) is installed at the lower end of the chamber of the oil reservoir (7). The hydraulic valve block (1) is sealed to the lower end of the working cylinder (6) through interference fit or sealing ring. The oil passage of the hydraulic valve block (1) is connected to the upper chamber (61) and the lower chamber (62) of the working cylinder as one unit. The hydraulic valve block (1) is equipped with an accumulator (4), a recovery solenoid valve (2), a compression solenoid valve (3), and an oil injection valve block (10).

2. The novel twin-cylinder fully active hydraulic suspension actuator according to claim 1, characterized in that, The hydraulic valve block (1) has an oil flow channel. The upper chamber (61) of the working cylinder is connected to the restoration solenoid valve (2) and the oil injection valve block (10) through the oil flow channel. The lower chamber (62) of the working cylinder is connected to the compression solenoid valve (3) and the oil injection valve block (10) through the oil flow channel. The oil injection valve block (10) has an oil passage hole. The oil pump pumps oil to the upper chamber (61) and the lower chamber (62). The restoration solenoid valve (2) and the compression solenoid valve (3) are connected to the oil end of the accumulator (4) through the valve block oil passage.

3. The novel twin-cylinder fully active hydraulic suspension actuator according to claim 1, characterized in that, The upper end of the working cylinder (6) is sealed to the guide (9) by interference fit or sealing ring, and the piston rod (5) passes through the guide (9) and the oil reservoir (7) and extends out of the damper.

4. The novel twin-cylinder fully active hydraulic suspension actuator according to claim 1, characterized in that, The piston rod (5) is located inside the working cylinder (6), and one end passes through the working cylinder (6) and the oil reservoir (7) in sequence to extend out of the shock absorber.

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