Suspension connecting structure and high-strength alloy vehicle body chassis of new energy vehicle

Abstract

The invention relates to the technical field of vehicle suspensions, in particular to a suspension connecting structure and a high-strength alloy vehicle body chassis of a new energy automobile. The suspension connecting structure comprises a suspension and a support, a main cylinder body filled with hydraulic oil is fixed to the suspension, a guide rod is fixed in the main cylinder body, and the guide rod is movably sleeved with a sliding sleeve; a piston is slidably arranged in the main cylinder body; a lower pressing plate is fixed to the sliding sleeve, an upper pressing plate is fixed to the piston, the guide rod is sleeved with a buffer spring, the two ends of the buffer spring are fixedly connected with the lower pressing plate and the upper pressing plate respectively, and a driving rod penetrating through a shell on the top of the main cylinder body is fixed to the piston. An oil storage tank used for storing hydraulic oil is fixed to the support, and an oil conveying pipe communicated with the interior of the main cylinder body is connected to the oil storage tank. The problems that when a traditional suspension deals with large impact, the buffering layer is thin, damping force is insufficient, and self-adaptive enhancement capacity is lacked are solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle suspension technology, specifically a suspension connection structure and a high-strength alloy chassis for new energy vehicles. Background Technology

[0002] The vehicle suspension system is a key component that ensures ride smoothness, handling stability, and ride comfort. One of its core functions is to buffer and absorb impact energy from the road surface. Traditional suspension systems typically use a combination of coil springs and shock absorbers. The springs mainly provide support and initial buffering, while the shock absorbers dissipate vibration energy and suppress rebound through the flow damping of the internal oil.

[0003] However, existing technologies often face the following challenges when dealing with extreme road impacts: (1) Most systems rely on the linear or nonlinear deformation of the spring and the damping of the shock absorber as the main buffering means. When the impact energy exceeds the instantaneous absorption capacity of the spring and the shock absorber, the suspension will quickly compress to the end of the stroke, resulting in a harsh mechanical collision, which seriously affects the body, chassis components and passenger comfort. (2) When the traditional hydraulic shock absorber is compressed violently, the internal oil flow channel and damping valve settings are fixed. Under extreme impact, the damping force generated may not be enough to quickly dissipate the huge energy, resulting in the direct transmission of the impact. (3) When dealing with a single huge impact, the existing suspension has a fixed buffering performance and cannot dynamically enhance the buffering capacity according to the compression state during the impact process. That is, it lacks an additional and powerful buffering means that can be activated in the middle and later stages of the impact.

[0004] To address the aforementioned issues, some studies have attempted to employ multi-stage stiffness springs, adjustable damping shock absorbers, or additional buffer blocks. However, these methods often suffer from structural complexity, delayed response, or limited rigidity buffering only at the end of the stroke. Consequently, they fail to achieve seamless, progressive, and adaptive energy absorption from the initial, middle, and final stages of the impact. Therefore, we propose a suspension connection structure and a high-strength alloy chassis for new energy vehicles to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a suspension connection structure and a high-strength alloy chassis for new energy vehicles, which can achieve a multi-stage, coordinated buffering process: the first stage uses the flexible buffer of elastic elements to absorb the initial impact; when the impact intensifies, it smoothly transitions to the second stage, using the compression damping of a closed hydraulic system to dissipate energy with greater force; when the impact reaches an extremely high level, the system can automatically trigger a third-stage mechanism, dynamically introducing additional hydraulic medium to drastically enhance the hydraulic damping effect, forming a final and powerful hydraulic safety wall, thereby fundamentally avoiding bottoming out and significantly improving the ability to mitigate extreme impacts, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A suspension connection structure includes a suspension and a bracket. A main cylinder filled with hydraulic oil is fixed on the suspension. A guide rod is fixed inside the main cylinder. A sliding sleeve is movably sleeved on the guide rod. A piston is slidably disposed inside the main cylinder. A lower pressure plate is fixed on the sliding sleeve, an upper pressure plate is fixed on the piston, a buffer spring is sleeved on the guide rod, and the two ends of the buffer spring are fixedly connected to the lower pressure plate and the upper pressure plate respectively. A drive rod that penetrates the top housing of the main cylinder is fixed on the piston. The bracket is fixed with an oil storage tank for storing hydraulic oil. The oil storage tank is connected to an oil supply pipe that communicates with the inside of the main cylinder. A one-way ball valve is installed on the oil supply pipe. A control valve rod that is rotatably installed on the one-way ball valve and connected to the internal valve core is also installed on it. A transmission rod is slidably mounted on the bracket. The transmission rod and the drive rod are connected by a first linkage mechanism, so that when the drive rod moves linearly, it will drive the transmission rod to move vertically. An oil pressure piston is movably engaged inside the oil storage tank. The transmission rod, control valve rod, and oil pressure piston are connected by a second linkage mechanism. When the drive rod moves, causing the transmission rod to move vertically, the second linkage mechanism drives the oil pressure piston and control valve rod to act sequentially. When the transmission rod moves to the first preset height, it will cause the control valve rod to swing momentarily, thereby opening the one-way ball valve; Subsequently, the transmission rod continues to move, which will push the hydraulic piston to compress the internal space of the oil tank, and force the hydraulic oil in it into the main cylinder through the opened oil delivery pipe and one-way ball valve.

[0007] As described above, a suspension connection structure is provided in which the inner wall of the main cylinder is provided with a guide groove whose inner diameter is adapted to the outer diameter of the piston, and the piston slides in conjunction with the guide groove.

[0008] As described above, a suspension connection structure includes an oil injection pipe installed on the oil storage tank for adding hydraulic oil to its interior, and a valve installed on the oil injection pipe.

[0009] As described above, a suspension connection structure includes a first linkage mechanism comprising a transverse groove plate fixed to a drive rod, a sliding groove being formed on the transverse groove plate, and a slider fixed on the drive rod, the slider being slidably engaged with the sliding groove.

[0010] As described above, a suspension connection structure is provided: a piston rod is coaxially and movably inserted into the oil storage tank, one end of the piston rod is fixedly connected to the top center of the oil pressure piston, and the other end extends out of the oil storage tank and is fixedly connected to the transmission rod.

[0011] As described above, a suspension connection structure includes a second linkage mechanism comprising a trigger rod fixed to a transmission rod and a support fixed to a bracket. A swing arm fixedly connected to a control valve rod is rotatably mounted on the support. A return spring is provided between the swing arm and the support. The two ends of the return spring are respectively connected to the swing arm and the support. When the swing arm swings to below the support, the one-way ball valve is in a closed state. When the swing arm swings to above the support, the one-way ball valve is in an open state.

[0012] As described above, a suspension connection structure is provided on the bracket, which is also provided with an electromagnetic drive mechanism to actively deflect and reset the swing arm. The electromagnetic drive mechanism includes an electromagnetic driver fixed on the bracket, and a pressure rod is installed at the output end of the electromagnetic driver. The electromagnetic driver is used to drive the pressure rod to move vertically.

[0013] As described above, a suspension connection structure is provided with a drain valve fixedly installed on the main cylinder for discharging hydraulic oil from inside the main cylinder to the outside.

[0014] As described above, a suspension connection structure is provided with a buffer block fixedly embedded at one end of the piston facing the top of the main cylinder. When the piston moves to near the end of its mechanical stroke under extreme impact, the buffer block will make flexible contact with the top inner wall of the guide groove, absorbing the last remaining impact energy through its own compression deformation, providing the ultimate physical safety protection for the entire system and avoiding rigid collisions between metal parts.

[0015] A high-strength alloy chassis for new energy vehicles includes the aforementioned suspension connection structure, wherein the suspension and the bracket are both fixedly mounted on the chassis.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention integrates elastic buffer, main hydraulic damping buffer and trigger-type enhanced hydraulic buffer through mechanical linkage design. When impacted, the buffer spring first provides a gentle first-level buffer. As the impact intensifies, the system smoothly transitions to the second-level strong hydraulic damping buffer formed by the compression of oil in the main cylinder. When the impact reaches an extremely high level, the linkage mechanism will automatically and instantaneously trigger the third-level mechanism to press the extra hydraulic oil in the oil tank into the main cylinder, which will drastically increase the hydraulic damping and form a hydraulic safety wall. Through the triple protection layer by layer, it ensures full-condition coverage from daily bumps to extreme impacts and completely eliminates the harsh collision at the end of the stroke of the traditional suspension. (2) The advantage of this invention lies in its passive triggering and active enhancement characteristics. Through the second linkage mechanism, the system only opens the one-way ball valve and starts the third stage of oil replenishment and pressurization when the piston displacement reaches the critical point, that is, when the first two stages of buffering are about to reach the limit. This process is triggered entirely by mechanical movement, and the response speed is extremely fast. No external control signal is required. When the third stage is working, the injection of additional oil causes the pressure inside the main cylinder to increase sharply, generating a huge damping force far exceeding that of traditional fixed damping shock absorbers. This can efficiently dissipate the energy of severe impact and greatly reduce the impact force transmitted to the vehicle body. (3) The electromagnetic drive mechanism in this invention allows for active control and reset when needed, which enhances the controllability of the system. The independent oil storage tank and oil filling pipe facilitate the inspection and replenishment of hydraulic oil. The oil drain valve set on the main cylinder body also facilitates system maintenance and oil replacement. In addition, the buffer block at the end of the piston provides the last physical protection, further ensuring that the mechanism will not be damaged due to overtravel. The whole system has a compact structure, clear logic, and high reliability. (4) This invention is particularly suitable for high-strength alloy chassis of new energy vehicles with high requirements for body rigidity, lightweight and driving quality. The suspension connection structure can effectively filter road impact and protect the brittle core components such as battery pack. At the same time, its excellent shock absorption capability also helps to improve the vehicle's handling stability and ride comfort, meeting the high standards of modern automobiles for safety, comfort and driving quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a suspension connection structure; Figure 2 A type of suspension connection structure Figure 1 A schematic diagram of the decomposed partial structure; Figure 3 A type of suspension connection structure Figure 2 A schematic diagram of the decomposed partial structure; Figure 4 A type of suspension connection structure Figure 3 Another structural diagram from a different perspective; Figure 5 A type of suspension connection structure Figure 3 A schematic diagram of the decomposed partial structure; Figure 6 A type of suspension connection structure Figure 5 A schematic diagram of the structure after partial cross-section of the main cylinder block; Figure 7 A type of suspension connection structure Figure 6 A partial structural diagram; Figure 8 A type of suspension connection structure Figure 6 A partial structural diagram of the oil storage tank, including a partial cross-sectional view. Figure 9 A type of suspension connection structure Figure 8 A schematic diagram of the decomposed partial structure; Figure 10 A type of suspension connection structure Figure 9 A schematic diagram of the decomposed part of the structure.

[0018] In the diagram: 1. Suspension; 2. Main cylinder block; 3. Guide rod; 4. Sliding sleeve; 5. Guide groove; 6. Piston; 7. Lower pressure plate; 8. Upper pressure plate; 9. Buffer spring; 10. Bracket; 11. Oil reservoir; 12. Oil supply pipe; 13. One-way ball valve; 14. Control valve stem; 15. Drive rod; 16. Transverse groove plate; 17. Transmission rod; 18. Slide groove; 19. Slider; 20. Piston rod; 21. Oil pressure piston; 22. Support; 23. Trigger rod; 24. Swing arm; 25. Return spring; 26. Electromagnetic actuator; 27. Pressure rod; 28. Oil injection pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Please see Figure 1-10 As an embodiment of the present invention, a suspension connection structure includes a suspension 1 and a bracket 10. A main cylinder 2 filled with hydraulic oil is fixed on the suspension 1. A guide rod 3 is fixed inside the main cylinder 2. A sliding sleeve 4 is movably sleeved on the guide rod 3. A piston 6 is slidably arranged inside the main cylinder 2. A lower pressure plate 7 is fixed on the sliding sleeve 4, an upper pressure plate 8 is fixed on the piston 6, a buffer spring 9 is sleeved on the guide rod 3, and the two ends of the buffer spring 9 are fixedly connected to the lower pressure plate 7 and the upper pressure plate 8 respectively. A drive rod 15 that penetrates the top housing of the main cylinder body 2 is fixed on the piston 6. A hydraulic oil storage tank 11 for storing hydraulic oil is fixed on the bracket 10. An oil supply pipe 12 that communicates with the inside of the main cylinder 2 is connected to the oil storage tank 11. A one-way ball valve 13 is installed on the oil supply pipe 12. A control valve stem 14 that is rotatably installed on the one-way ball valve 13 and connected to the internal valve core is mounted on the one-way ball valve 13. A transmission rod 17 is slidably mounted on the bracket 10. The transmission rod 17 and the drive rod 15 are connected by a first linkage mechanism, so that when the drive rod 15 moves linearly, it will drive the transmission rod 17 to move vertically. An oil pressure piston 21 is movably engaged inside the oil storage tank 11. The transmission rod 17, control valve rod 14, and oil pressure piston 21 are connected by a second linkage mechanism. When the drive rod 15 moves, causing the transmission rod 17 to move vertically, the second linkage mechanism will drive the oil pressure piston 21 and control valve rod 14 to act sequentially. When the transmission rod 17 moves to the first preset height, it will cause the control valve rod 14 to swing instantly, thereby opening the one-way ball valve 13; Subsequently, the transmission rod 17 continues to move, which will push the oil piston 21 to compress the internal space of the oil storage tank 11, and force the hydraulic oil in it into the main cylinder 2 through the opened oil delivery pipe 12 and the one-way ball valve 13.

[0021] In this embodiment, during use, when the wheel encounters an impact and moves upward, the sliding sleeve 4, which is hinged to the wheel ball, moves upward along the guide rod 3. The sliding sleeve 4 pushes the lower pressure plate 7 fixed thereon to squeeze the buffer spring 9. The buffer spring 9 is compressed and deformed, absorbing and buffering the initial impact energy. If the impact intensifies, the buffer spring 9 is further compressed to its deformation limit. The lower pressure plate 7 will then push the upper pressure plate 8 to move through the buffer spring 9. The upper pressure plate 8 will then drive the piston 6 to slide inside the main cylinder 2, compressing the hydraulic oil inside the main cylinder 2. This utilizes hydraulic damping to consume more energy and achieve further buffering. When the piston 6 moves upward, it drives the drive rod 15 fixed thereon to move synchronously. The movement of the drive rod 15 is converted into the vertical movement of the transmission rod 17 through the first linkage mechanism. When the transmission rod 17 moves vertically to the first preset height, it will be triggered by the second linkage mechanism, causing the control valve rod 14 to swing instantly, thereby quickly opening the one-way ball valve 13. Subsequently, the transmission rod 17 continues to move vertically, pushing the oil piston 21 to move in the oil tank 11 through the second linkage mechanism, compressing the oil storage space of the oil tank 11, and pressing the hydraulic oil inside it into the main cylinder 2 through the opened one-way ball valve 13 and the oil supply pipe 12, producing additional compression and pressurization effects on the hydraulic oil inside the main cylinder 2, forming a powerful hydraulic buffer in the final stage.

[0022] As a further embodiment of the present invention, the inner wall of the main cylinder 2 is provided with a guide groove 5 whose inner diameter is adapted to the outer diameter of the piston 6, and the piston 6 slides in conjunction with the guide groove 5.

[0023] In this embodiment, the guide groove 5 serves as a precision guide and sealing cavity for the piston 6 during movement. Its inner wall is machined with high precision and is adapted to the outer diameter of the piston 6 with micron-level tolerance, ensuring that the piston 6 slides stably and smoothly along the axis inside the main cylinder 2. This effectively prevents uneven wear, jamming, or abnormal wear of the seals caused by lateral forces. The presence of the guide groove 5 not only provides precise motion guidance, but the sliding pair formed by it and the piston 6 also forms the working cavity of the main hydraulic damping, which is the core structural basis for the effective and reliable realization of the second-stage buffering function.

[0024] As a further embodiment of the present invention, an oil injection pipe 28 for adding hydraulic oil to the oil storage tank 11 is installed thereon, and a valve is installed on the oil injection pipe 28.

[0025] In this embodiment, the oil filling pipe 28 is equipped with a screw-on dust cover or a screw plug with a sealing ring as a valve. Its function is to provide a standard interface for oil replenishment and maintenance of the entire hydraulic buffer system. Through this oil filling pipe 28, hydraulic oil that may be slightly lost due to long-term use can be conveniently replenished into the oil storage tank 11, or the oil can be completely replaced during major overhaul, thereby ensuring that the third-stage enhanced buffer mechanism always has sufficient and clean oil reserves, ensuring the efficiency and stability of the system in long-term operation.

[0026] As a further embodiment of the present invention, the first linkage mechanism includes a transverse groove plate 16 fixed to the drive rod 15, a sliding groove 18 is provided on the transverse groove plate 16, and a slider 19 is fixed on the transmission rod 17, with the slider 19 slidingly engaged with the sliding groove 18.

[0027] In this embodiment, the first linkage mechanism uses a slant and slider structure to achieve motion conversion. Specifically, a slant 18 is provided on the transverse slant plate 16 fixed to the drive rod 15, and the slider 19 fixed on the transmission rod 17 extends into the slant 18. When the drive rod 15 makes a slant linear motion, it drives the transverse slant plate 16 to move synchronously. The slant 18 and the slider 19 are perpendicularly distributed. The slant 18 will force the slider 19 to move in the vertical direction, thereby converting the slant linear motion of the drive rod 15 into the vertical motion of the transmission rod 17.

[0028] As a further embodiment of the present invention, a piston rod 20 is coaxially and movably inserted into the oil storage tank 11. One end of the piston rod 20 is fixedly connected to the top center of the oil pressure piston 21, and the other end extends out of the oil storage tank 11 and is fixedly connected to the transmission rod 17, so that the movement of the transmission rod 17 can directly and synchronously drive the oil pressure piston 21 to perform oil pumping action in the oil storage tank 11.

[0029] In this embodiment, the piston rod 20 serves as a rigid transmission element, with its two ends fixedly connected to the oil-pressing piston 21 and the transmission rod 17, respectively, forming a rigid motion transmission chain. When the transmission rod 17 begins to move vertically under the trigger of the second linkage mechanism, the force and displacement are directly transmitted to the oil-pressing piston 21 without delay through the piston rod 20, driving it to make synchronous and unidirectional linear motion within the cylinder of the oil storage tank 11. This rigid connection method ensures the immediacy and accuracy of the oil-pressing action, and can reliably perform the key actions of compressing the oil storage space and pumping hydraulic oil to the main cylinder 2, serving as the direct power source for achieving the third-stage pressurization and buffering.

[0030] As a further embodiment of the present invention, the second linkage mechanism includes a trigger rod 23 fixed on the transmission rod 17 and a support 22 fixed on the bracket 10. A swing arm 24 fixedly connected to the control valve rod 14 is rotatably mounted on the support 22. A return spring 25 is provided between the swing arm 24 and the support 22. The two ends of the return spring 25 are respectively connected to the swing arm 24 and the support 22. When the swing arm 24 swings to below the support 22, the one-way ball valve 13 is in the closed state. When the swing arm 24 swings to above the support 22, the one-way ball valve 13 is in the open state.

[0031] In this embodiment, the support 22 is a rigid support fixed to the bracket 10, and the swing arm 24 is a lever that can rotate around the hinge axis on the support 22. One end of the lever is fixedly connected to the control valve rod 14 to form a linked rocker arm structure. The trigger rod 23 fixed to the transmission rod 17 can be designed with a beveled side. When the transmission rod 17 rises to a preset critical height under impact, corresponding to the second-stage buffer approaching its limit, the trigger rod 23 contacts the force arm of the swing arm 24. As the transmission rod 17 continues to rise slightly, the trigger rod 23 pushes the swing arm 24 to overcome the initial preload of the return spring 25 and begin to rotate. When the swing arm 24 is pushed past the position parallel to the support 22 in its movement trajectory, the tension of the return spring 25 reaches its maximum value. Then the swing arm 24 continues to swing. Under the sudden change of the tension direction of the return spring 25, the system potential energy is released rapidly, causing the swing arm 24 and the control valve stem 14 to swing instantaneously, quickly switching from below the support 22 to above and stabilizing in the open position. This instantaneous action characteristic ensures the rapid and decisive opening of the one-way ball valve 13, providing a precise triggering time for the subsequent third-stage oil pressure boosting buffer, and avoiding the pressure build-up delay caused by the slow opening of the valve port.

[0032] As a further embodiment of the present invention, the bracket 10 is also provided with an electromagnetic drive mechanism for actively swinging and resetting the swing arm 24. The electromagnetic drive mechanism includes an electromagnetic driver 26 fixed on the bracket 10. A pressure rod 27 is installed at the output end of the electromagnetic driver 26. The electromagnetic driver 26 is used to drive the pressure rod 27 to move vertically.

[0033] In this embodiment, the pressure rod 27 at the output end of the electromagnetic actuator 26 can extend vertically when energized. When active reset is required, the electromagnetic actuator 26 is energized to extend the pressure rod 27 downward and directly push the swing arm 24, forcing it to swing back from the open position to the closed position, thereby closing the one-way ball valve 13. This enhances the controllability of the system and facilitates active intervention under specific working conditions or during system self-test.

[0034] As a further aspect of the present invention, a drain valve for discharging hydraulic oil from inside the main cylinder 2 is fixedly installed on the main cylinder 2.

[0035] In this embodiment, the drain valve is a standard hydraulic interface with a hexagonal or external hexagonal plug. When the system requires long-term maintenance, replacement of different types of hydraulic oil, troubleshooting, or drainage of oil that may be caused by minor leakage from the seal, this drain valve can be opened to safely and completely drain the hydraulic oil inside the main cylinder 2 into a designated container. This provides convenience for the long-term reliable operation and life-cycle maintenance of the system and ensures the working performance of the main cylinder 2.

[0036] As a further aspect of the present invention, a buffer block made of highly elastic rubber or polyurethane material is fixedly embedded at one end of the piston 6 facing the top of the main cylinder 2. When the piston 6 moves to near the end of its mechanical stroke under extreme impact, the buffer block will make flexible contact with the top inner wall of the guide groove 5, and absorb the last remaining impact energy through its own compression deformation, providing the ultimate physical safety protection for the entire system and avoiding rigid collisions between metal parts.

[0037] In this embodiment, the buffer block is made of highly elastic materials such as rubber. It is the last physical safety protection. In extreme cases, even if the three-stage hydraulic buffer mechanism is working, the piston 6 may still approach its mechanical stroke limit. At this time, the buffer block will make flexible contact with the inner top surface of the guide groove 5 and absorb the remaining impact energy through its own deformation, so as to avoid the piston 6 from rigidly colliding with the main cylinder 2 and protect the components from damage.

[0038] The working principle of this invention is as follows: When the wheel encounters a road impact, its movement is transmitted to the suspension connection structure through the ball joint sliding sleeve 4. The impact energy first drives the sliding sleeve 4 to move upward, pushing the lower pressure plate 7 to compress the buffer spring 9, which serves as the first-stage buffer. If the impact energy is large, after the buffer spring 9 is compressed to its limit, the pressure will be transmitted to the upper pressure plate 8 through the buffer spring 9, thereby driving the piston 6 to slide within the main cylinder 2, compressing the hydraulic oil inside, and achieving the second-stage buffer through hydraulic damping. The movement of the piston 6 synchronously drives the drive rod 15, which is converted into the vertical movement of the transmission rod 17 through the first linkage mechanism. When the transmission rod 17 moves to the preset position, it is connected to the first linkage mechanism. The two-linkage mechanism instantly moves the control valve rod 14, opening the one-way ball valve 13, thereby automatically triggering the third-stage buffering mechanism. Subsequently, the continued movement of the transmission rod 17 will push the oil piston 21, forcing the extra hydraulic oil in the oil tank 11 into the main cylinder 2 through the opened oil supply pipe 12 and the one-way ball valve 13, drastically increasing the cylinder pressure and forming an extremely strong ultimate hydraulic damping buffer. After the impact, under the restoring force of the buffer spring 9 and the action of the electromagnetic drive mechanism electromagnetic actuator 26 and the pressure rod 27, all components return to their initial state, and the one-way ball valve 13 closes, preparing for the next impact, thus achieving a seamless three-stage, progressively enhanced adaptive buffering effect.

[0039] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.

Claims

1. A suspension connecting structure comprising a suspension (1) and a bracket (10), characterized by, The suspension (1) is fixed with a main cylinder (2) filled with hydraulic oil, a guide rod (3) is fixed in the main cylinder (2), a sliding sleeve (4) is movably sleeved on the guide rod (3), and a piston (6) is slidably arranged in the main cylinder (2); A lower pressing plate (7) is fixed on the sliding sleeve (4), an upper pressing plate (8) is fixed on the piston (6), a buffer spring (9) is sleeved on the guide rod (3), and the two ends of the buffer spring (9) are fixedly connected with the lower pressing plate (7) and the upper pressing plate (8), respectively, and a driving rod (15) penetrating through the top shell of the main cylinder (2) is fixed on the piston (6); The bracket (10) is fixed with an oil storage tank (11) for storing hydraulic oil, the oil storage tank (11) is connected with an oil delivery pipe (12) communicating with the inside of the main cylinder (2), the oil delivery pipe (12) is provided with a one-way ball valve (13), and the one-way ball valve (13) is rotatably provided with a control valve rod (14) connected with an internal valve core; The transmission rod (17) is slidably arranged on the bracket (10), and the transmission rod (17) and the driving rod (15) are connected through a first linkage mechanism, so that when the driving rod (15) moves linearly, the transmission rod (17) moves vertically. The oil delivery piston (21) is movably connected in the oil storage tank (11), and the transmission rod (17), the control valve rod (14) and the oil delivery piston (21) are connected through a second linkage mechanism, so that when the driving rod (15) moves to drive the transmission rod (17) to move vertically, the oil delivery piston (21) and the control valve rod (14) are driven to act in sequence through the second linkage mechanism: When the transmission rod (17) moves to a first preset height, the control valve rod (14) is instantaneously swung to open the one-way ball valve (13); Subsequently, the transmission rod (17) continues to move to push the oil delivery piston (21) to compress the internal space of the oil storage tank (11), so that the hydraulic oil therein is finally pressed into the inside of the main cylinder (2) through the opened oil delivery pipe (12) and the one-way ball valve (13).

2. A suspension link structure according to claim 1, wherein The inner wall of the main cylinder (2) is provided with a guide groove (5) with an inner diameter size matched with the outer diameter size of the piston (6), and the piston (6) and the guide groove (5) are in sliding fit.

3. The suspension link structure of claim 1 wherein, The oil storage tank (11) is provided with an oil injection pipe (28) for adding hydraulic oil to the inside of the oil storage tank (11), and the oil injection pipe (28) is provided with a valve.

4. The suspension link structure of claim 1 wherein, The first linkage mechanism comprises a transverse groove plate (16) fixed with the driving rod (15), the transverse groove plate (16) is provided with a sliding groove (18), the transmission rod (17) is fixed with a sliding block (19), and the sliding block (19) and the sliding groove (18) are in sliding fit.

5. The suspension link structure of claim 1 wherein, The oil storage tank (11) is coaxially movably inserted with a piston rod (20), one end of the piston rod (20) is fixedly connected with the top center of the oil delivery piston (21), the other end extends out of the oil storage tank (11) and is fixedly connected with the transmission rod (17).

6. A suspension link structure according to claim 5, wherein The second linkage mechanism comprises a trigger top rod (23) fixed on a transmission rod (17) and a support (22) fixed on a bracket (10), the support (22) is rotatably provided with a swing arm (24) fixedly connected with a control valve rod (14), a reset spring (25) is arranged between the swing arm (24) and the support (22), the two ends of the reset spring (25) are respectively connected with the swing arm (24) and the support (22), when the swing arm (24) swings to below the support (22), the one-way ball valve (13) is in a closed state, when the swing arm (24) swings to above the support (22), the one-way ball valve (13) is in an open state.

7. The suspension link structure of claim 1 wherein, The bracket (10) is further provided with an electromagnetic drive mechanism for actively resetting the swing arm (24) to swing, the electromagnetic drive mechanism comprises an electromagnetic driver (26) fixed on the bracket (10), and a pressing rod (27) is arranged on the output end of the electromagnetic driver (26), and the electromagnetic driver (26) is used for driving the pressing rod (27) to move vertically.

8. The suspension link structure of claim 1 wherein, The main cylinder body (2) is fixedly provided with an oil discharge valve for discharging hydraulic oil in the main cylinder body (2) to the outside.

9. The suspension link structure of claim 2 wherein, One end of the piston (6) towards the top of the main cylinder body (2) is fixedly embedded with a buffer block, when the piston (6) moves to the end of the mechanical stroke under extreme impact, the buffer block will be in flexible contact with the top inner wall surface of the guide groove (5).

10. A new energy vehicle high-strength alloy vehicle body chassis, comprising the suspension connecting structure according to any one of claims 1-9, characterized in that, The suspension (1) and the bracket (10) are fixedly installed on the vehicle body chassis.

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