Hydraulic cushioning type multi-oil-cylinder leveling system

Abstract

The utility model provides a kind of hydraulic buffering formula multi-oil cylinder leveling system, belong to vehicle control technical field, including hydraulic system and electrical control system;Hydraulic system includes hydraulic pump, hand pump, three-position four-way electromagnetic reversing valve, one-way hydraulic lock, electromagnetic ball valve and outrigger cylinder;Hydraulic pump is communicated with three-position four-way electromagnetic reversing valve, hand pump is connected between hydraulic pump and three-position four-way electromagnetic reversing valve, and safety valve is connected between hydraulic pump and oil tank;Three-position four-way electromagnetic reversing valve is communicated with electromagnetic ball valve, and overload valve is connected between electromagnetic ball valve and oil return port, and the oil outlet of electromagnetic ball valve is communicated with outrigger cylinder.The utility model can remove impact load by overload valve, and can ensure emergency reliability by hand pump, valve and controller, significantly improve operation efficiency and leveling accuracy, can make up protection, emergency and operation short board, and is suitable for promotion.

Description

Technical Field

[0001] This utility model relates to the field of vehicle control technology, and in particular to a hydraulic buffer multi-cylinder leveling system. Background Technology

[0002] The vehicle-mounted automatic leveling system is a core auxiliary system in vehicle control technology, and its performance directly affects the equipment's combat response efficiency and operational safety. Existing technologies, such as the Chinese patent with authorization announcement number CN210290330U, disclose a vehicle-mounted automatic leveling system. This system has achieved integrated design: the hydraulic circuit is simplified through integrated blocks one and two; a single-phase horizontal motor drives an oil suction pump to output hydraulic oil; and in conjunction with an electromagnetic directional valve, a proportional pressure valve, a pressure sensor, and a PLC program, it achieves uniform extension and retraction of the leveling outriggers and horizontal adjustment, with a leveling accuracy of 0.05 degrees. It also includes an oil suction filter and a mesh filter to ensure the cleanliness of the hydraulic oil, meeting the basic leveling requirements under normal operating conditions.

[0003] While the existing systems described above can meet the needs of normal operating conditions, they still have the following shortcomings in actual use: The existing systems lack a mechanism to buffer against unexpected impacts, making them difficult to adapt to the requirements of vehicles equipped with precision equipment as designed in the current technology. Precision equipment such as online dust and air quality monitors are susceptible to instantaneous impacts from collisions, sudden load changes, or ground vibrations during operation. The system only controls the normal operating pressure through a system pressure regulating valve, which cannot quickly relieve the high pressure of the impact. Instantaneous pressure can easily lead to the failure of hydraulic component seals, and may even cause calibration deviations and structural deformation of the vehicle-mounted precision equipment, seriously affecting the equipment's functionality.

[0004] In addition, the existing system relies entirely on electric drive and has no manual emergency device. When the power is cut off or the motor fails, the outriggers cannot be operated, which poses a risk of equipment being stranded. The system only relies on a single electromagnetic ball valve to lock the oil circuit, which is prone to leakage and instability under long-term load or vibration. Furthermore, it lacks a "one-button retraction" function, and the outrigger retraction operation is cumbersome. These technical defects make it difficult to cope with complex working conditions. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as lack of accidental impact buffering mechanism, cumbersome operation, and poor adaptability, and to provide a hydraulic buffer multi-cylinder leveling system.

[0006] This utility model is achieved through the following technical solution: a hydraulic buffer multi-cylinder leveling system, comprising a hydraulic system and an electrical control system; the hydraulic system includes a hydraulic pump, a manual pump, a three-position four-way solenoid directional valve, a one-way hydraulic lock, a solenoid ball valve, and outrigger cylinders; the oil outlet of the hydraulic pump is connected to the oil inlet of the three-position four-way solenoid directional valve, the manual pump is connected in parallel to the pipeline between the hydraulic pump and the three-position four-way solenoid directional valve, and a safety valve is connected in parallel between the oil outlet of the hydraulic pump and the oil tank; the oil outlet of the three-position four-way solenoid directional valve is connected to the oil inlet of the solenoid ball valve through the one-way hydraulic lock. An overload valve is connected in parallel between the oil inlet and return port of the electromagnetic ball valve, and the oil outlet of the electromagnetic ball valve is connected to the oil chamber of the outrigger cylinder. Multiple outrigger cylinders are provided, distributed at the bottom of the vehicle body. The electrical control system includes a controller, pressure sensors, and tilt sensors. The number of pressure sensors corresponds to the number of outrigger cylinders, and multiple pressure sensors are respectively installed on the oil lines of the corresponding outrigger cylinders. The tilt sensor is installed at the center of the vehicle body. The pressure sensors, tilt sensors, three-position four-way electromagnetic directional valve, and electromagnetic ball valve are all electrically connected to the controller.

[0007] Compared to existing technologies that lack a buffer structure and rely solely on electric drive, this system utilizes a cone-valve overload valve to rapidly remove impact loads, effectively protecting vehicle-mounted precision equipment from collision or vibration damage. The four outrigger cylinders, combined with precise signal feedback from pressure and tilt sensors, enable the controller to achieve high-precision leveling, avoiding the outrigger suspension or overload issues inherent in existing technologies that only raise and never lower. The emergency design of the manual pump compensates for the lack of a manual emergency mechanism in existing technologies, ensuring the system remains operational even in the event of a hydraulic pump failure, thus enhancing the equipment's applicability and safety under complex working conditions.

[0008] A further improvement of this utility model is that the overload valve is a cone valve.

[0009] The cone valve structure has a faster response speed and can unload impact loads in milliseconds. Compared with ordinary ball valve overload valves, it effectively reduces the impact of impact on outrigger cylinders and vehicle-mounted equipment, and improves the system's impact resistance.

[0010] A further improvement of this utility model is that the one-way hydraulic lock is a double-valve core one-way valve.

[0011] The dual-valve-core design enables independent locking of the extension and retraction oil circuits. Compared with the single-valve-core structure, it avoids the risk of outrigger subsidence caused by the failure of a single valve core, improves the reliability of outrigger locking, and is especially suitable for long-term stationary operation scenarios.

[0012] A further improvement of this utility model is that the two valve cores of the one-way hydraulic lock correspond to the extension oil circuit and retraction oil circuit of the outrigger cylinder, respectively.

[0013] Precisely corresponding extension and retraction oil circuits prevent oil crossflow from causing delays or malfunctions in outrigger movement, ensuring more precise control of outrigger extension and retraction, while further enhancing the locking effect to prevent slow settling caused by oil circuit interconnection.

[0014] A further improvement of this invention is that a one-way valve is provided at the oil outlet of the manual pump.

[0015] To prevent hydraulic oil from back-flowing and impacting the internal structure of the manual pump during operation, thus protecting the manual pump from damage and extending its service life, while also ensuring unidirectional oil flow during emergency oil supply, thereby improving the stability of emergency operations.

[0016] A further improvement of this utility model is that the conduction direction of the one-way valve is the direction from the manual pump to the three-position four-way solenoid directional valve.

[0017] The clear unidirectional flow direction ensures that the hydraulic pump and the manual pump do not interfere with each other. There is no need to worry about oil diversion when the hydraulic pump is working normally, and there is no oil backflow loss when the manual pump is in an emergency, thus improving the reliability of switching between the two pumps.

[0018] A further improvement of this utility model is that the valve core end of the three-position four-way electromagnetic reversing valve is provided with a manual lever.

[0019] It provides a mechanical emergency control method in case of electrical failure. Compared with systems that rely solely on electric control, it avoids oil circuit lock-up caused by solenoid valve failure, ensures redundant backup of outrigger direction control, and improves system fault tolerance.

[0020] A further improvement of this utility model is that a manual knob is provided on the outside of the valve cover of the electromagnetic ball valve.

[0021] The hydraulic circuit of each outrigger can be controlled independently. With the manual lever of the three-position four-way solenoid directional valve, precise adjustment of each outrigger can be achieved, which solves the limitation of overall control in the event of electrical failure and improves the flexibility of emergency leveling.

[0022] A further improvement of this utility model is that both the manual lever and the manual knob can be manually operated in the event of a power outage or electrical fault.

[0023] The dual manual operation mechanism ensures that the outrigger movement can still be fully controlled under extreme electrical faults. Compared with the single manual control method, the operation is more comprehensive and reliable, avoiding equipment stagnation due to the inability to adjust the outriggers and improving adaptability to complex working conditions.

[0024] A further improvement of this utility model is that four outrigger cylinders are provided, and the four outrigger cylinders are respectively arranged at four positions on the bottom of the vehicle body.

[0025] Compared to a layout with fewer than four outriggers, the four-way outriggers provide more stable support for the vehicle body. They can also be adjusted diagonally or unilaterally to achieve multi-angle leveling with higher precision, adapting to various terrains such as slopes and potholes, thus improving vehicle stability.

[0026] As can be seen from the above technical solutions, the beneficial effects of this utility model are: 1. Compared to existing technologies, the core advantage of this system lies in its reliable hydraulic buffer protection capability, effectively safeguarding the safety of vehicle-mounted precision equipment. Existing technologies lack any impact protection structure, relying solely on system pressure regulating valves to control conventional pressure. This is insufficient to handle unexpected impacts such as collisions and sudden load changes during operation, easily leading to damage to hydraulic components or deformation of vehicle-mounted precision equipment. In contrast, this system connects a cone-type overload valve in parallel between the inlet and outlet ports of the electromagnetic ball valve. This allows for rapid removal of impact loads when the work platform is subjected to impact, directly addressing the shortcomings of existing technologies and providing targeted protection for vehicle-mounted precision equipment, preventing functional failure or irreversible damage caused by impacts.

[0027] 2. This system, through its multiple emergency control designs, significantly improves reliability and applicability under complex working conditions, addressing the shortcomings of existing technologies in emergency response. Current technologies rely entirely on electric drive, lacking manual emergency mechanisms. In the event of power failure or hydraulic pump malfunction, the outriggers become inoperable, easily leading to equipment stagnation. This system not only adds a manual pump but also incorporates manual levers and knobs on the three-position four-way solenoid directional valve and solenoid ball valve. Combined with the controller's abnormal switching logic, this ensures that the outriggers can still be manually adjusted in the event of electrical or hydraulic failures, preventing equipment from "locking up" due to malfunctions. It is suitable for scenarios requiring emergency operation, such as vehicle relocation and disaster relief.

[0028] 3. This system's leveling control logic is more precise and its operation more efficient, solving the problems of insufficient leveling stability and cumbersome operation in existing technologies. Existing technologies only use a "raise only, don't lower" logic, and the four outriggers are prone to suspension or overload due to uneven ground when simultaneously contacting the ground. Furthermore, there is no one-button retraction function; each outrigger must be controlled individually for retraction. This system, through a "forward and backward step-by-step" ground contact logic, ensures stable ground contact for the outriggers on complex terrain. The "one-button retraction" function enables simultaneous retraction of all four outriggers, automatically stopping once the pressure sensor detects the retraction is complete. The dual-valve one-way hydraulic lock can also independently lock the extension / retraction oil circuit to prevent outrigger subsidence. Attached Figure Description

[0029] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1This is a structural schematic diagram of a specific embodiment of the present utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the outrigger cylinder, tilt sensor, and vehicle body in a specific embodiment of this utility model.

[0032] Figure 3 This is a schematic diagram of a specific embodiment of the present utility model.

[0033] In the diagram: 1. Hydraulic pump; 2. Manual pump; 201. Check valve; 3. Safety valve; 4. Solenoid directional valve; 5. One-way hydraulic lock; 6. Pressure sensor; 7. Overload valve; 8. Solenoid ball valve; 9. Outrigger cylinder; 10. Tilt sensor; 11. Vehicle body. Detailed Implementation

[0034] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0035] Now refer to Figure 1-3The following is a description of a specific embodiment: The hydraulic buffer multi-cylinder leveling system of this utility model includes a hydraulic system and an electrical control system. The hydraulic system includes a hydraulic pump 1, a manual pump 2, a three-position four-way solenoid directional valve 4, a one-way hydraulic lock 5, a solenoid ball valve 8, and outrigger cylinders 9. The oil outlet of the hydraulic pump 1 is connected to the oil inlet of the three-position four-way solenoid directional valve 4. The manual pump 2 is connected in parallel to the pipeline between the hydraulic pump 1 and the three-position four-way solenoid directional valve 4. A safety valve 3 is connected in parallel between the oil outlet of the hydraulic pump 1 and the oil tank. The oil outlet of the three-position four-way solenoid directional valve 4 is connected to the oil inlet of the solenoid ball valve 8 through the one-way hydraulic lock 5. An overload valve 7 is connected in parallel between the oil inlet and return port of the solenoid ball valve 8. The oil outlet of the solenoid ball valve 8 is connected to the oil chamber of the outrigger cylinder 9. Four outrigger cylinders 9 are provided, distributed on the vehicle body 11. Bottom; The electrical control system includes a controller, pressure sensors 6 and tilt sensors 10. The number of pressure sensors 6 corresponds to the number of outrigger cylinders 9. Four pressure sensors 6 are respectively installed on the oil lines of the corresponding outrigger cylinders 9. The tilt sensors 10 are installed at the center of the vehicle body 11. The pressure sensors 6, tilt sensors 10, three-position four-way solenoid valve 4 and solenoid ball valve 8 are all electrically connected to the controller. Combining existing controller software technology, the controller has a built-in control program. The controller can determine the outrigger contact state based on the outrigger pressure signal fed back by the pressure sensors 6, and the controller can control the three-position four-way solenoid valve 4 and solenoid ball valve 8 to adjust the extension and retraction of the outrigger cylinders 9 based on the levelness signal fed back by the tilt sensors 10. The overload valve 7 is a cone valve. The overload valve 7 can relieve the impact load when the working platform is subjected to an accidental impact.

[0036] This system achieves leveling and buffering functions through the coordinated operation of the hydraulic and electrical control systems: In the hydraulic system, hydraulic pump 1 outputs hydraulic oil, which enters the outrigger cylinders 9 via the three-position four-way solenoid directional valve 4, the one-way hydraulic lock 5, and the solenoid ball valve 8, driving the extension and retraction of the four outrigger cylinders 9; manual pump 2 is connected in parallel between hydraulic pump 1 and the three-position four-way solenoid directional valve 4, providing emergency hydraulic power in case of hydraulic pump 1 failure; safety valve 3 is connected in parallel between the oil outlet of hydraulic pump 1 and the oil tank to prevent damage to components due to excessive hydraulic system pressure; and the cone valve-type overload valve 7 connected in parallel between the inlet and outlet of the solenoid ball valve 8 can quickly open to relieve the impact load when the working platform is subjected to an accidental impact. In the electrical control system, four pressure sensors 6 detect the oil circuit pressure of the corresponding outrigger cylinders 9, and the tilt sensor 10 detects the levelness of the vehicle body 11 center. Both transmit signals to the controller with built-in control program. The controller determines whether the outrigger is in contact with the ground based on the pressure signal from the pressure sensor 6, and controls the three-position four-way solenoid directional valve 4 and solenoid ball valve 8 to adjust the extension and retraction of the outrigger cylinders 9, ultimately achieving a level vehicle body.

[0037] Compared to existing technologies that lack a buffer structure and rely solely on electric drive, this system utilizes a cone-type overload valve 7 to quickly remove impact loads, effectively protecting vehicle-mounted precision equipment from collision or vibration damage. The four outrigger cylinders 9, combined with the precise signal feedback from the pressure sensor 6 and tilt sensor 10, enable the controller to achieve high-precision leveling, avoiding the outrigger suspension or overload issues inherent in existing technologies that operate on a "only raise, never lower" logic. The emergency design of the manual pump 2 compensates for the lack of a manual emergency mechanism in existing technologies, ensuring that the system remains operational even if the hydraulic pump 1 fails, thus enhancing the applicability and safety of the equipment under complex working conditions.

[0038] Specifically, refer to Figure 1 and 3 Combining existing controller software technology, the controller's control program includes a "front and rear step-by-step" ground contact logic: the controller first controls the two front outrigger cylinders 9 to extend, and when the pressure detected by the pressure sensor 6 corresponding to the front outrigger reaches the preset ground contact threshold, it then controls the two rear outrigger cylinders 9 to extend until the pressure detected by the pressure sensor 6 corresponding to the rear outrigger reaches the preset ground contact threshold; the controller's control program also includes an abnormal switching logic: when the pressure value detected by the pressure sensor 6 exceeds the preset safety range for more than 5 seconds, or when the tilt sensor 10 has no signal feedback for more than 3 seconds, the controller automatically deactivates the automatic leveling mode and switches to manual mode.

[0039] When the controller's built-in "front and rear outriggers moving separately" ground contact logic is activated, the controller first outputs signals to control the three-position four-way solenoid directional valve 4 and solenoid ball valve 8 corresponding to the two front outrigger cylinders 9 to extend the front outrigger cylinders 9. When the pressure sensor 6 corresponding to the front outrigger detects that the pressure has reached the preset ground contact threshold—indicating that the front outrigger is stably in contact with the ground—the controller then controls the two rear outrigger cylinders 9 to extend until the pressure sensor 6 of the rear outrigger detects that the pressure has reached the preset ground contact threshold, completing the ground contact of all outriggers. At the same time, the controller's abnormal switching logic monitors in real time: if the pressure value detected by the pressure sensor 6 exceeds the preset safety range for more than 5 seconds, or if the tilt sensor 10 has no signal feedback for more than 3 seconds, the controller automatically deactivates the automatic leveling mode and switches to manual mode, awaiting manual operation.

[0040] This "separate front and rear walking" ground contact logic avoids the problems of some outriggers being suspended in the air and others being overloaded due to uneven ground when all four outriggers touch the ground simultaneously in existing technologies. It enables the outriggers to maintain stable ground contact even on complex surfaces such as potholes and slopes, laying the foundation for subsequent precise leveling. The abnormal switching logic can promptly identify hydraulic system faults or sensor failures by setting time thresholds for pressure exceeding the range and sensor no signal, avoiding malfunctions of the outriggers caused by continuous faults, such as unexpected extension or retraction. Compared with the design of existing technologies without a fault switching mechanism, it greatly improves the reliability of system operation and protects the safety of the vehicle body and on-board equipment.

[0041] Specifically, refer to Figure 1 and 3 In conjunction with existing controller application technology, the controller is also connected to a "one-click retraction" button. When the "one-click retraction" button is pressed, the controller controls the four outrigger cylinders 9 to retract synchronously. When the pressure is detected by the pressure sensors 6 corresponding to the four outriggers and reaches the preset retraction threshold, the controller controls the outrigger cylinders 9 to stop retracting.

[0042] When the button is pressed, the controller outputs a synchronous control signal, causing the three-position four-way solenoid directional valve 4 and solenoid ball valve 8 corresponding to the four outrigger cylinders 9 to switch to the retraction oil circuit, driving the four outrigger cylinders 9 to retract synchronously. During the retraction process, the pressure sensors 6 corresponding to the four outriggers monitor the pressure of their respective oil circuits in real time. When the pressure sensor 6 of a certain outrigger detects that the pressure reaches the preset retraction threshold, it indicates that the outrigger has been retracted to the correct position. The controller continues to monitor all sensor signals until the pressure sensors 6 of all four outriggers reach the preset retraction threshold. At this point, the controller outputs a stop signal to control the outrigger cylinders 9 to stop retracting.

[0043] The "one-click retraction" function eliminates the need to retract the outriggers one by one as required by existing technologies, simplifying the operation process and significantly reducing the outrigger retraction time. It is especially suitable for scenarios requiring rapid outrigger retraction, such as combat relocation and emergency evacuation, thereby improving equipment mobility. The simultaneous retraction of all four outriggers, with pressure thresholds used to determine when they are in place, avoids tilting of the vehicle body due to asynchronous outrigger retraction during the retraction process, preventing damage to onboard precision equipment caused by tilting. At the same time, it ensures that all outriggers are retracted to their proper positions, avoiding driving safety hazards caused by individual outriggers not being retracted.

[0044] Specifically, refer to Figure 1 and 3 The one-way hydraulic lock 5 is a double-valve-core one-way valve, and the two valve cores of the one-way hydraulic lock 5 correspond to the extension oil circuit and retraction oil circuit of the outrigger cylinder 9, respectively.

[0045] When the outrigger cylinder 9 extends, hydraulic oil pushes the valve core corresponding to the extension oil circuit to open, and hydraulic oil enters the rodless chamber of the outrigger cylinder 9, driving the outrigger to extend. After the outrigger is fully extended, the valve core of the extension oil circuit automatically closes, locking the extension oil circuit and preventing hydraulic oil backflow. When the outrigger cylinder 9 retracts, hydraulic oil pushes the valve core corresponding to the retraction oil circuit to open, and hydraulic oil enters the rod chamber of the outrigger cylinder 9, driving the outrigger to retract. After the outrigger is fully retracted, the valve core of the retraction oil circuit automatically closes, locking the retraction oil circuit and preventing hydraulic oil backflow.

[0046] This system, through the design of a dual-valve core type one-way hydraulic lock 5, can achieve independent locking of the extension and retraction oil circuits. Compared with the existing technology that only relies on the single locking of the electromagnetic ball valve 12, the dual locking structure can effectively prevent the outriggers from slowly sinking due to the failure of the electromagnetic ball valve 8 seal. Especially in the long-term static operation of vehicle-mounted equipment—such as continuous radar monitoring or vibration environment, the outrigger locking stability is stronger, avoiding vehicle tilting caused by outrigger sinking, ensuring the working accuracy of vehicle-mounted equipment, and reducing the frequency of equipment calibration and maintenance costs.

[0047] Specifically, refer to Figure 1 and 3 The manual pump 2 is equipped with a one-way valve 201 at its oil outlet end. The one-way valve 201 is in the direction that the manual pump 2 points to the three-position four-way solenoid directional valve 4.

[0048] The manual pump 2 is equipped with a check valve 201 at its outlet. The flow direction of the check valve 201 only allows hydraulic oil to flow from the manual pump 2 to the three-position four-way solenoid directional valve 4. When the hydraulic pump 1 is working normally, the hydraulic oil flows from the hydraulic pump 1 to the three-position four-way solenoid directional valve 4. The check valve 201 is automatically closed due to reverse pressure to prevent the hydraulic oil from flowing back into the manual pump 2. When the hydraulic pump 1 fails or is powered off, the operator can manually operate the manual pump 2. The hydraulic oil output by the manual pump 2 opens the check valve 201 and enters the outrigger cylinder 9 through the three-position four-way solenoid directional valve 4, the one-way hydraulic lock 5, and the solenoid ball valve 8, thereby realizing the emergency lifting and lowering of the outrigger cylinder 9.

[0049] This system, through the design of the check valve 201, effectively prevents hydraulic oil from flowing back into the manual pump 2 during normal operation of the hydraulic pump 1, preventing damage to the internal components of the manual pump 2 due to reverse pressure and extending the service life of the manual pump 2. At the same time, the cooperation between the manual pump 2 and the check valve 201 provides the system with reliable emergency hydraulic power, making up for the deficiency of no manual emergency drive in the existing technology, ensuring that the outriggers can still be operated when the hydraulic pump 1 fails, avoiding the equipment being stranded at the work site due to the outriggers being unable to move, and improving the fault tolerance and emergency response capability of the system.

[0050] Specifically, refer to Figure 1 and 3 The valve core end of the three-position four-way solenoid directional valve 4 is provided with a manual lever, and the valve cover of the solenoid ball valve 8 is provided with a manual knob. Both the manual lever and the manual knob can be manually operated in the event of power failure or electrical fault.

[0051] In this system, the valve core of the three-position four-way solenoid directional valve 4 is equipped with a manual lever, and the valve cover of the solenoid ball valve 8 is equipped with a manual knob. When the system is powered off or there is an electrical fault—such as the controller or solenoid valve coil failure causing the electric control to fail—the operator can switch the valve core position by moving the manual lever of the three-position four-way solenoid directional valve 4 to control the flow of hydraulic oil—that is, the extension or retraction of the corresponding outrigger cylinder. At the same time, the oil circuit of the solenoid ball valve 8 can be opened or closed by rotating the manual knob of the solenoid ball valve 8, and the oil flow of the corresponding outrigger cylinder 9 can be controlled independently, so as to realize the manual lifting and lowering adjustment of each outrigger cylinder 9.

[0052] The manual lever of the three-position four-way solenoid directional valve 4 and the manual knob of the solenoid ball valve 8 form a "dual manual control". Compared with the existing technology design without any manual valve control, it can still adjust the outriggers when the electrical system fails completely, avoiding the outriggers from "locking up" due to electrical faults. Moreover, the two can be operated independently. The overall oil circuit direction can be controlled by the manual lever, and the individual outriggers can be precisely adjusted by the manual knob. It is suitable for emergency leveling or retraction scenarios after electrical faults, further improving the emergency reliability of the system and ensuring the operability of the equipment under extreme conditions.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic buffer-type multi-cylinder leveling system, comprising a hydraulic system and an electrical control system, characterized in that, The hydraulic system includes a hydraulic pump (1), a manual pump (2), a three-position four-way solenoid directional valve (4), a one-way hydraulic lock (5), a solenoid ball valve (8), and a support cylinder (9). The outlet of the hydraulic pump (1) is connected to the inlet of the three-position four-way solenoid directional valve (4). The manual pump (2) is connected in parallel to the pipeline between the hydraulic pump (1) and the three-position four-way solenoid directional valve (4). A safety valve (3) is connected in parallel between the outlet of the hydraulic pump (1) and the oil tank. The outlet of the three-position four-way solenoid directional valve (4) is connected to the inlet of the solenoid ball valve (8) through the one-way hydraulic lock (5). An overload valve (7) is connected in parallel between the inlet and return ports of the solenoid ball valve (8). The oil outlet of the solenoid ball valve (8) is connected to the oil chamber of the outrigger cylinder (9); multiple outrigger cylinders (9) are provided, and the multiple outrigger cylinders (9) are distributed at the bottom of the vehicle body (11); the electrical control system includes a controller, a pressure sensor (6) and a tilt sensor (10). The number of pressure sensors (6) corresponds to the number of outrigger cylinders (9). Multiple pressure sensors (6) are respectively installed on the oil circuit of the corresponding outrigger cylinder (9). The tilt sensor (10) is installed at the center of the vehicle body (11). The pressure sensor (6), tilt sensor (10), three-position four-way solenoid directional valve (4) and solenoid ball valve (8) are all electrically connected to the controller.

2. The hydraulic buffer multi-cylinder leveling system according to claim 1, characterized in that, The overload valve (7) is a cone valve.

3. The hydraulic buffer multi-cylinder leveling system according to claim 1, characterized in that, The one-way hydraulic lock (5) is a double-core one-way valve.

4. A hydraulic buffer-type multi-cylinder leveling system according to claim 3, characterized in that, The two valve cores of the one-way hydraulic lock (5) correspond to the extension oil circuit and retraction oil circuit of the outrigger cylinder (9), respectively.

5. A hydraulic buffer-type multi-cylinder leveling system according to claim 1, characterized in that, The manual pump (2) is equipped with a check valve (201) at the oil outlet end.

6. A hydraulic buffer-type multi-cylinder leveling system according to claim 5, characterized in that, The one-way valve (201) is in the direction of the manual pump (2) pointing towards the three-position four-way solenoid directional valve (4).

7. A hydraulic buffer-type multi-cylinder leveling system according to claim 1, characterized in that, The valve core end of the three-position four-way solenoid directional valve (4) is provided with a manual lever.

8. A hydraulic buffer-type multi-cylinder leveling system according to claim 7, characterized in that, The electromagnetic ball valve (8) has a manual knob on the outside of its valve cover.

9. A hydraulic buffer-type multi-cylinder leveling system according to claim 8, characterized in that, Both the manual lever and the manual knob can be operated manually in the event of a power outage or electrical fault.

10. A hydraulic buffer-type multi-cylinder leveling system according to claim 1, characterized in that, The outrigger cylinders (9) are provided in four positions, which are respectively arranged at the four positions of the bottom of the vehicle body (11).

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