Supporting leg oil cylinder and hydraulic auxiliary supporting system

Abstract

The utility model provides a landing leg oil cylinder and a hydraulic auxiliary supporting system, and belongs to the technical field of heavy machinery, the landing leg oil cylinder comprises a telescopic oil cylinder and a landing leg base located at the bottom of the telescopic oil cylinder, and the landing leg base is used for supporting the telescopic oil cylinder; the travel switch is provided with a switch contact, and the switch contact protrudes towards the ground, so that the travel switch is in contact with the ground before the landing leg base is in contact with the ground, and the landing leg base has a complete ground contact state and a non-complete ground contact state; the manual adjusting mechanism is arranged on the supporting leg base; in a state of completely contacting with the ground, the telescopic oil cylinder normally stretches out and draws back; in the state that the supporting leg base is not in complete contact with the ground, the supporting leg base is adjusted to be in complete contact with the ground through the manual adjusting mechanism. The hydraulic supporting leg oil cylinder can effectively solve the problem that the supporting stability of the hydraulic supporting leg oil cylinder is insufficient in a complex environment, and ensures that the supporting leg oil cylinder can be reliably withdrawn when a hydraulic system breaks down, so that the safety and the emergency evacuation capacity of an engineering vehicle are improved.

Description

Technical Field

[0001] This utility model relates to the field of heavy machinery technology, and in particular to a support leg cylinder and a hydraulic auxiliary support system. Background Technology

[0002] Construction vehicles (such as aerial work platforms and cranes) typically require auxiliary support devices to improve stability in complex and variable working environments. Hydraulic outrigger cylinders are a common type of auxiliary support device. Driven by a hydraulic system, they can adjust the extension length of the outriggers according to road conditions to ensure vehicle stability during construction. However, due to the complexity of the working environment, the contact surfaces between the outrigger cylinders and the ground are often not on the same plane. This means that in some cases, some outriggers may not reach the ground even when fully extended, reducing the actual support surface. This situation is particularly dangerous for construction vehicles operating at height, potentially leading to serious accidents such as vehicle rollover.

[0003] Furthermore, domestic engineering vehicle customers have very strict requirements for emergency evacuation in case of vehicle malfunction. Typically, engineering vehicles are equipped with manual and electric emergency pumps as auxiliary power sources for emergency evacuation in case of hydraulic system failure. However, in actual use, there are still situations where engineering vehicles cannot retract the hydraulic outrigger cylinders using either the electric or manual emergency pump, resulting in the vehicle being unable to evacuate. Analysis shows that such malfunctions are usually caused by the following reasons:

[0004] Hydraulic pump failure: The hydraulic pump fails to work properly, causing the hydraulic system to lose power and preventing the outrigger cylinders from retracting.

[0005] Hydraulic lock cannot be opened: The hydraulic lock of the outrigger cylinder cannot be unlocked in a faulty state, causing the cylinder to be unable to retract.

[0006] The aforementioned problems not only affect the working efficiency of engineering vehicles but also pose serious challenges to their safety and reliability. Therefore, there is an urgent need for a technical solution that can effectively address the insufficient support stability of hydraulic outrigger cylinders in complex environments and ensure reliable retraction of the outrigger cylinders in the event of hydraulic system failure, thereby improving the safety and emergency evacuation capabilities of engineering vehicles. Utility Model Content

[0007] The purpose of this utility model is to overcome at least one of the shortcomings of the prior art and provide an outrigger cylinder and hydraulic auxiliary support system that effectively solves the problem of insufficient support stability of hydraulic outrigger cylinders in complex environments, ensures reliable retraction of outrigger cylinders in the event of hydraulic system failure, and improves the safety and emergency evacuation capability of engineering vehicles.

[0008] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0009] According to one aspect of the present invention, a support leg cylinder is provided, comprising a telescopic cylinder and a support leg base located at the bottom of the telescopic cylinder, the support leg base being used to support the telescopic cylinder; the support leg base is provided with:

[0010] A limit switch has a switch contact that protrudes toward the ground so that the limit switch contacts the ground before the support leg base contacts the ground, and the support leg base has a state of complete contact with the ground and a state of incomplete contact with the ground.

[0011] A manual adjustment mechanism is provided on the support leg base;

[0012] When fully in contact with the ground, the telescopic cylinder extends and retracts normally; when not fully in contact with the ground, the manual adjustment mechanism is used to adjust the outrigger base to the state of full contact with the ground.

[0013] In some exemplary embodiments of this utility model, based on the aforementioned scheme, there are multiple manual adjustment mechanisms, and the multiple manual adjustment mechanisms are evenly spaced on the support leg base.

[0014] In some exemplary embodiments of this utility model, based on the foregoing solution, the telescopic cylinder is further provided with a cartridge valve block, and the cartridge valve block is provided with:

[0015] A hydraulic lock is connected to the telescopic cylinder via a hydraulic circuit for adjusting the hydraulic circuit of the telescopic cylinder.

[0016] In some exemplary embodiments of this utility model, based on the foregoing scheme, a pressure control valve is also provided inside the cartridge valve block.

[0017] In some exemplary embodiments of this utility model, based on the foregoing solution, the hydraulic lock has a manual adjustment port.

[0018] According to another aspect of the present invention, a hydraulic auxiliary support system is provided, comprising:

[0019] Hydraulic oil tank, used to store hydraulic oil;

[0020] Such as the outrigger cylinders mentioned above;

[0021] A hydraulic pump unit is connected to the hydraulic oil tank and the outrigger cylinder;

[0022] The outrigger cylinder has a working state and an idle state. In the working state, the hydraulic pump pumps hydraulic oil into the outrigger cylinder, and the outrigger cylinder extends and contacts the ground. In the idle state, the outrigger cylinder retracts and moves away from the ground.

[0023] In some exemplary embodiments of this utility model, based on the foregoing solution, the hydraulic pump device includes:

[0024] Main hydraulic pump;

[0025] Manual hydraulic pump;

[0026] Electric hydraulic pump;

[0027] The main hydraulic pump input is connected to one output of the hydraulic oil tank; the input of the manual hydraulic pump and the input of the electric hydraulic pump are simultaneously connected to the other output of the hydraulic oil tank; and the outputs of the main hydraulic pump, the manual hydraulic pump, and the electric hydraulic pump are connected in parallel to the outrigger cylinder.

[0028] In some exemplary embodiments of this utility model, based on the foregoing solution, the hydraulic auxiliary support system further includes a valve body device located between the outrigger cylinder and the hydraulic pump device.

[0029] In some exemplary embodiments of this utility model, based on the foregoing solution, the valve body device includes:

[0030] Pressure reducing valve;

[0031] Overflow valve;

[0032] First electromagnetic reversing valve;

[0033] Second electromagnetic reversing valve;

[0034] The pressure reducing valve has its input end connected to both the output end of the manual hydraulic pump and the output end of the electric hydraulic pump. One output end is connected to the P port of the first solenoid directional valve, and the other output end is connected to the return port of the hydraulic oil tank. The T port of the first solenoid directional valve is connected to the return port of the hydraulic oil, and its A port and B port are respectively connected to the outrigger cylinder. The P port of the second solenoid directional valve is connected to both one end of the relief valve and the output end of the main hydraulic pump. Its A port is connected to the return port of the hydraulic oil tank, and the other end of the relief valve is connected to the return port of the hydraulic oil tank.

[0035] In some exemplary embodiments of this utility model, based on the foregoing scheme, a high-pressure filter is also provided at the output end of the main hydraulic pump.

[0036] As can be seen from the above technical solution, this utility model has the following advantages and positive effects:

[0037] The outrigger cylinder provided by this utility model, by setting a limit switch on the outrigger base, can detect the contact status in advance before the outrigger base fully contacts the ground. When the outrigger base is not fully in contact with the ground, the limit switch will trigger a signal to prompt the operator to make adjustments, thereby avoiding safety hazards such as equipment tilting, shaking, or instability caused by the outrigger base not fully contacting the ground, and thus significantly improving the stability and operational safety of the equipment. In addition, when the outrigger base is not fully in contact with the ground, the manual adjustment mechanism can be used to quickly adjust the outrigger base to achieve a state of full contact with the ground, thereby ensuring the normal operation of the cylinder and avoiding the impact on equipment performance due to poor contact of the outrigger base. Therefore, the setting of the manual adjustment mechanism not only simplifies the operation process, but also improves the adaptability of the equipment under different ground conditions (such as uneven, soft, or sloping ground). The advance detection of the limit switch and the auxiliary adjustment of the manual adjustment mechanism can prevent the outrigger base from bearing uneven loads or impacts due to incomplete contact with the ground, thereby reducing the wear of the cylinder and the outrigger base and extending the service life of the equipment. Attached Figure Description

[0038] The above and other features and advantages of this invention will become more apparent from a detailed description of exemplary embodiments with reference to the accompanying drawings.

[0039] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the miniature outrigger cylinder of this utility model;

[0040] Figure 2 yes Figure 1 Side view;

[0041] Figure 3 yes Figure 1 The main view;

[0042] Figure 4 yes Figure 1 Top view;

[0043] Figure 5 yes Figure 4 A magnified view of the area along line A in the middle;

[0044] Figure 6 This is a structural schematic diagram of one embodiment of the present invention, showing the support base facing the telescopic hydraulic cylinder.

[0045] Figure 7 This is a schematic diagram of one embodiment of the support base of this utility model facing the ground;

[0046] Figure 8 This is a structural schematic diagram of one embodiment of the micro hydraulic auxiliary support system of this utility model.

[0047] Explanation of reference numerals in the attached figures

[0048] 1. Telescopic cylinder; 2. Outrigger base; 21. Limit switch; 211. Switch contact; 22. Manual adjustment mechanism; 221. Adjusting bolt; 222. Locking nut; 223. Support base; 3. Cartridge valve block; 31. Hydraulic lock; 311. Manual adjustment port; 32. Pressure control valve; 4. Hydraulic oil tank; 5. Hydraulic pump unit; 51. Main hydraulic pump; 52. Manual hydraulic pump; 53. Electric hydraulic pump; 61. Pressure reducing valve; 62. Relief valve; 63. First solenoid directional valve; 64. Second solenoid directional valve; 7. High-pressure filter; 8. Power take-off; 9. Shut-off valve; 91. One-way throttle valve; 92. Pressure switch. Detailed Implementation

[0049] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0050] The features, structures, or characteristics described above can be combined in any suitable manner in one or more embodiments, and the features discussed in the various embodiments are interchangeable where possible. In the above description, numerous specific details are provided to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0051] Although relative terms such as "up" and "down" are used in this invention to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the icon's arrangement is flipped so that it is upside down, the component described as "up" will become the component described as "down". Other relative terms such as "high", "low", "top", "bottom", "front", "back", "left", and "right" also have similar meanings. When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0052] In this utility model, the terms "a", "an", "the", "the", and "at least one" are used to indicate the existence of one or more elements / components / etc.; the terms "comprising", "including", and "having" are used to indicate an open-ended meaning of inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.

[0053] According to one aspect of the present invention, a support leg cylinder is provided, with reference to... Figures 1 to 5 As shown, it includes a telescopic hydraulic cylinder 1 and a support leg base 2 located at the bottom of the telescopic hydraulic cylinder 1. The support leg base 2 is used to support the telescopic hydraulic cylinder 1; the support leg base 2 is provided with:

[0054] Limit switch 21 has a switch contact 211 that protrudes toward the ground so that the limit switch 21 contacts the ground before the support leg base 2 contacts the ground, and the support leg base 2 has a state of complete contact with the ground and a state of incomplete contact with the ground.

[0055] The manual adjustment mechanism 22 is provided on the support leg base 2;

[0056] When fully in contact with the ground, the telescopic cylinder 1 extends and retracts normally; when not fully in contact with the ground, the manual adjustment mechanism 22 is used to adjust the outrigger base 2 to the state of full contact with the ground.

[0057] As can be seen from the above technical solution, this utility model has the following advantages and positive effects:

[0058] The outrigger cylinder provided by this utility model, by setting a limit switch 21 on the outrigger base 2, can detect the contact status in advance before the outrigger base 2 fully contacts the ground. When the outrigger base 2 is not fully in contact with the ground, the limit switch 21 will trigger a signal to prompt the operator to make adjustments, thereby avoiding safety hazards such as equipment tilting, shaking, or instability caused by the outrigger base 2 not fully contacting the ground, and thus significantly improving the stability and operational safety of the equipment. In addition, when the outrigger base 2 is not fully in contact with the ground, the manual adjustment mechanism 22 can be used to quickly adjust the outrigger base 2 to achieve a state of full contact with the ground, thereby ensuring the normal operation of the cylinder and avoiding the impact on equipment performance due to poor contact of the outrigger base 2. Therefore, the setting of the manual adjustment mechanism 22 can not only simplify the operation process, but also improve the adaptability of the equipment under different ground conditions (such as uneven, soft, or sloping ground). The advance detection of the limit switch 21 and the auxiliary adjustment of the manual adjustment mechanism 22 can prevent the outrigger base 2 from bearing uneven loads or impacts due to incomplete contact with the ground, thereby reducing the wear of the cylinder and the outrigger base 2 and extending the service life of the equipment.

[0059] This utility model does not impose specific restrictions on the type of telescopic cylinder 1. For example, in some embodiments, the telescopic cylinder 1 can be a single-stage telescopic cylinder 1, a multi-stage telescopic cylinder 1, a double-acting telescopic cylinder 1, etc. Those skilled in the art can select and design according to the needs of specific application scenarios.

[0060] The outrigger base 2 supports the telescopic cylinder 1 to ensure that the telescopic cylinder 1 can stably contact the ground during operation. In some embodiments, the cross-section of the outrigger base 2 can be designed to be slightly larger than the cross-section of the telescopic cylinder 1, or it can be designed to be much larger than the cross-section of the telescopic cylinder 1. Designing the cross-section of the outrigger base 2 to be much larger than the cross-section of the telescopic cylinder 1 not only increases the contact area with the ground, further improving the supporting force and reducing local pressure concentration, thereby improving the safety and reliability of the entire hydraulic outrigger system, but also disperses the load transmitted by the cylinder, providing better stability and load-bearing capacity. This ensures that the outrigger can maintain good support under heavy loads or complex terrain (such as uneven, soft, or sloping ground), further enhancing the stability and safety of the equipment.

[0061] refer to Figures 3 to 5 As shown, the switch contact 211 of the limit switch 21 protrudes towards the ground, ensuring that the contact makes contact with the ground before the support leg base 2 contacts the ground. The switch contact 211 can be made of wear-resistant and impact-resistant materials (such as high-strength alloys or engineering plastics) to withstand direct contact and friction with the ground. The shape of the switch contact 211 can be designed as spherical, conical, or flat to adapt to different ground conditions (such as uneven or soft ground).

[0062] In some embodiments, the switch contact 211 can be designed to connect to a spring or lever mechanism inside the limit switch 21. In this way, when the switch contact 211 contacts the ground, mechanical force triggers the spring or lever mechanism, thereby changing the state of the switch. In other embodiments, the switch contact 211 can also be designed to connect to an electrical control system inside the limit switch 21. In this way, when the switch contact 211 contacts the ground, the switch outputs an electrical signal, which is transmitted to the electrical control system to generate an indication of the contact status of the support leg base 2.

[0063] With its protruding contacts, reliable triggering mechanism, status detection function, and linkage with the manual adjustment mechanism 22, the limit switch 21 can not only detect the contact status of the outrigger base 2 in real time, but also ensure the safety and stability of the equipment under various operating conditions. Its protective design and adjustment function further enhance the durability and adaptability of the limit switch 21, making it an indispensable key component in the design of the outrigger cylinder.

[0064] The manual adjustment mechanism 22 can be configured as a screw structure, allowing the height of the outrigger base 2 to be adjusted by rotating the screw. Generally, an adjustment handle can be installed at the other end of the screw. The adjustment handle and screw are detachable, allowing the adjustment handle and screw to be assembled when the outrigger base 2 is not fully in contact with the ground, so that the screw can be rotated using the adjustment handle. In other states, the adjustment handle and screw can be disassembled to save space and prevent accidental collisions.

[0065] refer to Figure 6 and Figure 7 As shown, the manual adjustment mechanism 22 includes an adjusting bolt 221, a locking nut 222, and a support base 223. The adjusting bolt 221 is fixedly connected to the support base 223. During adjustment, loosen the locking nut 222, rotate the adjusting bolt 221, and the support base 223 will extend out of the outrigger base 2 and eventually contact the uneven ground. After it is fully in contact with the ground, tighten the locking nut 222.

[0066] In some implementations, reference Figure 1 and Figure 4 As shown, multiple manual adjustment mechanisms 22 can also be designed, with multiple manual adjustment mechanisms 22 evenly spaced on the outrigger base 2, to further improve the stability, adjustment accuracy and adaptability of the outrigger cylinder.

[0067] The specific number of manual adjustment mechanisms 22 can be set according to the size of the outrigger base 2 and the load requirements, generally 3-6, evenly distributed on the edge or key support points of the outrigger base 2 to ensure even load distribution. For a circular outrigger base 2, the manual adjustment mechanisms 22 can be evenly distributed along the circumference (e.g., one every 120°). For a rectangular outrigger base 2, the manual adjustment mechanisms 22 can be set at the four corners.

[0068] In addition, in some implementations, references Figures 1 to 3 As shown, a cartridge valve block 3 can also be designed on the telescopic cylinder 1, and the cartridge valve block 3 is provided with:

[0069] The hydraulic lock 31 is connected to the telescopic cylinder 1 via a hydraulic oil circuit for adjusting the hydraulic circuit of the telescopic cylinder 1.

[0070] Designing a cartridge valve block 3 on the telescopic cylinder 1 can further enhance the control capability and safety of the hydraulic system. The hydraulic lock 31 on the cartridge valve block 3 can lock the hydraulic circuit of the telescopic cylinder 1. When the telescopic cylinder 1 reaches the target position, the hydraulic lock 31 automatically locks the hydraulic circuit to prevent the cylinder from accidentally retracting or extending under load. The hydraulic lock 31 can be a two-way hydraulic lock 31 to ensure that the telescopic cylinder 1 can be locked in both the extended and retracted states.

[0071] In addition, the hydraulic lock 31 can be designed with a manual adjustment port 311 so that the operator can release the locking state of the hydraulic lock 31 through the manual adjustment port 311 when the hydraulic system malfunctions or cannot work properly. In some embodiments, the manual adjustment port 311 can be connected to the unlocking mechanism inside the hydraulic lock 31 via a thread, allowing the operator to use a hand tool (such as an Allen wrench, screwdriver, or knob) to rotate the adjustment port. The rotation action rotates the locking element of the hydraulic lock 31 through the thread. In other embodiments, the manual adjustment port 311 is directly connected to the locking element of the hydraulic lock 31 via a push rod or piston, so that the operator can rotate or pull the manual adjustment port 311 to push the push rod or piston to move axially, unlocking the valve core or locking spring inside the hydraulic lock 31, thereby releasing the lock and allowing the hydraulic cylinder to retract.

[0072] Of course, one or a combination of pressure control valve 32, flow control valve, and solenoid directional valve can also be installed in the cartridge valve block 3. The pressure control valve 32 can be a relief valve 62 or a pressure reducing valve 61 to ensure the hydraulic circuit operates within a safe pressure range; the flow control valve can be a throttle valve or a speed control valve to control the extension and retraction of the telescopic cylinder 1; and the solenoid directional valve can be a two-position four-way directional valve or a three-position four-way solenoid directional valve to ensure the flexibility and reliability of the cylinder's movement. Integrating the hydraulic lock 31, pressure control valve 32, flow control valve, and solenoid directional valve into the cartridge valve block 3 simplifies the layout of the hydraulic system.

[0073] The cartridge valve block 3 can be installed on the telescopic cylinder 1 by means of flange connection, threaded connection, etc., or it can be installed on the top or side of the telescopic cylinder 1 by means of suspension bracket. This utility model does not impose any specific limitations.

[0074] According to another aspect of this utility model, a hydraulic auxiliary support system is provided, with reference to... Figure 8 As shown, it includes:

[0075] Hydraulic oil tank 4 is used to store hydraulic oil;

[0076] The aforementioned outrigger cylinders;

[0077] The hydraulic pump unit is connected to the hydraulic oil tank 4 and the outrigger cylinder;

[0078] The outrigger cylinder has a working state and an idle state. In the working state, the hydraulic pump pumps hydraulic oil into the outrigger cylinder, and the outrigger cylinder extends and contacts the ground. In the idle state, the outrigger cylinder retracts and moves away from the ground.

[0079] The hydraulic auxiliary support system, through the coordinated operation of the hydraulic oil tank 4, outrigger cylinders and hydraulic pump device, can achieve stable support and convenient adjustment of equipment (cranes, excavators, bulldozers, etc.).

[0080] Since the structure of the outrigger cylinder has already been described above, this utility model will not be repeated here.

[0081] The hydraulic pump unit pumps hydraulic oil from the tank into the outrigger cylinder, driving the cylinder to extend and retract. In some embodiments, the hydraulic pump unit may be designed to include a main hydraulic pump 51, a manual hydraulic pump 52, and an electric hydraulic pump 53. The input end of the main hydraulic pump 51 is connected to one output end of the hydraulic tank 4; the input ends of the manual hydraulic pump 52 and the electric hydraulic pump 53 are simultaneously connected to the other output end of the hydraulic tank 4; and the output ends of the main hydraulic pump 51, the manual hydraulic pump 52, and the electric hydraulic pump 53 are connected in parallel to the outrigger cylinder.

[0082] The main hydraulic pump 51, as the primary power source of the system, provides high-pressure hydraulic oil to the outrigger cylinders. The main hydraulic pump 51 is typically driven by an electric motor and is suitable for normal operating conditions. It can be a gear pump, vane pump, or piston pump, selected according to the system's pressure and flow requirements. Its input end is connected to one output end of the hydraulic oil tank 4, pumping hydraulic oil into the outrigger cylinders through pipelines. The main hydraulic pump 51 can be powered by an electric motor or by a power take-off (PTO) 8. The PTO 8 is suitable for locations where there is no power grid connection, such as in the field or during equipment movement. The PTO 8 directly drives the hydraulic system with mechanical power, providing greater flexibility and enhancing the system's adaptability.

[0083] In the event of a failure of the main hydraulic pump 51 or a power outage, the manual hydraulic pump 52 can serve as a backup power source, providing hydraulic power through manual operation. The input end of the manual hydraulic pump 52 is connected to the other output end of the hydraulic oil tank 4 to ensure oil supply. It is a manually operated bidirectional pump that generates hydraulic oil flow through the reciprocating motion of the handle, and the output end is connected to the outrigger cylinder.

[0084] When the main hydraulic pump 51 cannot provide additional hydraulic power to meet demand, an electric hydraulic pump 53 assembly can be used to provide an auxiliary power source. The electric hydraulic pump 53 can be a small hydraulic pump driven by an electric motor to save space and cost. Furthermore, the electric hydraulic pump 53 can be equipped with a switch to control its operation. Alternatively, a control logic can be set to automatically activate the electric hydraulic pump 53 when the output pressure of the main hydraulic pump 51 is less than a preset value.

[0085] Because the input ends of the main hydraulic pump 51, manual hydraulic pump 52, and electric hydraulic pump 53 are respectively connected to different output ends of the hydraulic oil tank 4, and the output ends are connected in parallel to the outrigger cylinders, each pump can work independently without interfering with the others. Furthermore, the multiple designs of the main hydraulic pump 51, manual hydraulic pump 52, and electric hydraulic pump 53 ensure that the system can operate normally under various conditions, improving the system's flexibility and reliability.

[0086] In some embodiments, a valve body device may also be provided between the outrigger cylinder and the hydraulic pump assembly to further enhance the controllability, safety, and flexibility of the hydraulic system. In the hydraulic auxiliary support system provided by this utility model, reference... Figure 8 As shown, the valve body assembly includes a pressure reducing valve 61, a relief valve 62, a first solenoid directional valve 63, and a second solenoid directional valve 64. The input end of the pressure reducing valve 61 is connected to both the output end of the manual hydraulic pump 52 and the output end of the electric hydraulic pump 53. One output end is connected to the P port of the first solenoid directional valve 63, and the other output end is connected to the return port of the hydraulic oil tank 4. The T port of the first solenoid directional valve 63 is connected to the return port of the hydraulic oil, and its A and B ports are respectively connected to the outrigger cylinders. The P port of the second solenoid directional valve 64 is connected to both one end of the relief valve 62 and the output end of the main hydraulic pump 51. Its A port is connected to the hydraulic oil tank 4, and the other end of the relief valve 62 is connected to the return port of the hydraulic oil tank 4.

[0087] Here, the input end of the pressure reducing valve 61 is connected to the output ends of both the manual hydraulic pump 52 and the electric hydraulic pump 53, ensuring that the hydraulic oil from the backup power source can enter the system through the pressure reducing valve 61 to reduce the working pressure of the hydraulic circuit and ensure that the system operates within a safe pressure range; one end of the relief valve 62 is connected to the P port of the second solenoid directional valve 64 and the output end of the main hydraulic pump 51, limiting the output pressure of the main hydraulic pump 51 to prevent system overload, and the other end is connected to the return port of the hydraulic oil tank 4, allowing overpressurized hydraulic oil to return to the tank; the P port of the first solenoid directional valve 63 is connected to the input end of the pressure reducing valve 61. The first output end can receive low-pressure hydraulic oil. Its T port is connected to the return port of the hydraulic oil tank 4, which can return the oil to the tank. In addition, its A port and B port are connected to the rodless chamber and rod chamber of the outrigger cylinder, respectively, to control the extension and retraction of the cylinder and realize the flow direction control of the hydraulic oil. The P port of the second solenoid directional valve 64 is connected to one end of the relief valve 62 and the output end of the main hydraulic pump 51 to receive the high-pressure hydraulic oil of the main hydraulic pump 51. Its A port is connected to the return port of the hydraulic oil tank 4 to return the excess hydraulic oil to the tank. Therefore, it can control the flow direction of the output oil of the main hydraulic pump 51 and realize the pressure regulation and oil return of the system.

[0088] Based on this, a shut-off valve 9 can be installed between the return port of the hydraulic oil tank 4 and the A port of the second solenoid directional valve 64 to effectively prevent hydraulic oil from flowing back when the system is shut down, ensuring that hydraulic oil only flows through the valve when needed, avoiding hydraulic oil from flowing back into the oil tank in the hydraulic circuit, thereby maintaining system pressure and stability, and preventing the negative pressure caused by backflow from affecting the normal operation of other components.

[0089] In addition, in some embodiments, a high-pressure filter 7 can be installed at the output end of the main hydraulic pump 51. The high-pressure filter 7 can effectively filter impurities, particles, and contaminants in the hydraulic oil, preventing them from entering the hydraulic system. This helps protect critical components such as hydraulic pumps, valves, and cylinders from wear, blockage, or damage, extending the service life of the equipment.

[0090] In some embodiments of this utility model, reference is made to Figure 8 As shown, a one-way throttle valve 91 can be installed between the two outrigger cylinders, and a pressure switch 92 can be equipped for each outrigger cylinder. The one-way throttle valve 91 can control the flow of hydraulic oil between the two outrigger cylinders, enabling the two outrigger cylinders to maintain better synchronization during extension and retraction. By setting the one-way throttle valve 91, the uneven extension and retraction of the two outrigger cylinders due to uneven hydraulic oil flow can be avoided, thereby improving the stability and balance of the outriggers and ensuring the smooth operation of the hydraulic system. The pressure switch 92 equipped for each outrigger cylinder can monitor the working pressure in the cylinder in real time. The pressure switch 92 can detect whether there is an abnormal pressure and trigger an alarm in time to prevent hydraulic system failure or equipment damage due to excessively low or high pressure. The pressure switch 92 can effectively protect the outrigger cylinders and the hydraulic system, ensuring that they operate within a safe pressure range and avoiding equipment damage caused by hydraulic system pressure problems.

[0091] It should be understood that this invention is not limited to the detailed structure and arrangement of the components proposed in this invention. This invention can have other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this invention. It should be understood that the invention disclosed and defined herein extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of this invention. The embodiments described herein illustrate the best known mode for implementing this invention and will enable those skilled in the art to utilize this invention.

Claims

1. A support leg hydraulic cylinder, characterized in that, The system includes a telescopic hydraulic cylinder and a support leg base located at the bottom of the telescopic hydraulic cylinder, the support leg base being used to support the telescopic hydraulic cylinder; the support leg base is provided with: A limit switch has a switch contact that protrudes toward the ground so that the limit switch contacts the ground before the support leg base contacts the ground, and the support leg base has a state of complete contact with the ground and a state of incomplete contact with the ground. A manual adjustment mechanism is provided on the support leg base; When fully in contact with the ground, the telescopic cylinder extends and retracts normally; when not fully in contact with the ground, the manual adjustment mechanism is used to adjust the outrigger base to the state of full contact with the ground.

2. The outrigger cylinder according to claim 1, characterized in that, There are multiple manual adjustment mechanisms, which are evenly spaced on the support leg base.

3. The outrigger cylinder according to claim 1, characterized in that, The telescopic cylinder is also equipped with a cartridge valve block, which has the following features: A hydraulic lock is connected to the telescopic cylinder via a hydraulic circuit for adjusting the hydraulic circuit of the telescopic cylinder.

4. The outrigger cylinder according to claim 3, characterized in that, The cartridge valve block is also equipped with a pressure control valve.

5. The outrigger cylinder according to claim 3, characterized in that, The hydraulic lock has a manual adjustment port.

6. A hydraulic auxiliary support system, characterized in that, include: Hydraulic oil tank, used to store hydraulic oil; The outrigger cylinder as described in any one of claims 1-5; A hydraulic pump unit is connected to the hydraulic oil tank and the outrigger cylinder; The outrigger cylinder has a working state and an idle state. In the working state, the hydraulic pump pumps hydraulic oil into the outrigger cylinder, and the outrigger cylinder extends and contacts the ground. In the idle state, the outrigger cylinder retracts and moves away from the ground.

7. The hydraulic auxiliary support system according to claim 6, characterized in that, The hydraulic pump unit includes: Main hydraulic pump; Manual hydraulic pump; Electric hydraulic pump; The main hydraulic pump input is connected to one output of the hydraulic oil tank; the input of the manual hydraulic pump and the input of the electric hydraulic pump are simultaneously connected to the other output of the hydraulic oil tank; and the outputs of the main hydraulic pump, the manual hydraulic pump, and the electric hydraulic pump are connected in parallel to the outrigger cylinder.

8. The hydraulic auxiliary support system according to claim 7, characterized in that, The hydraulic auxiliary support system also includes a valve body device located between the outrigger cylinder and the hydraulic pump device.

9. The hydraulic auxiliary support system according to claim 8, characterized in that, The valve body assembly includes: Pressure reducing valve; Overflow valve; First electromagnetic directional valve; Second electromagnetic reversing valve; The pressure reducing valve has its input end connected to both the output end of the manual hydraulic pump and the output end of the electric hydraulic pump. One output end is connected to the P port of the first solenoid directional valve, and the other output end is connected to the return port of the hydraulic oil tank. The T port of the first solenoid directional valve is connected to the return port of the hydraulic oil, and its A port and B port are respectively connected to the outrigger cylinder. The P port of the second solenoid directional valve is connected to both one end of the relief valve and the output end of the main hydraulic pump. Its A port is connected to the return port of the hydraulic oil tank, and the other end of the relief valve is connected to the return port of the hydraulic oil tank.

10. The hydraulic auxiliary support system according to any one of claims 7-9, characterized in that, The output end of the main hydraulic pump is also equipped with a high-pressure filter.

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