A loader stability module, hydraulic system, and loader

Abstract

This invention discloses a loader stabilization module, a hydraulic system, and a loader. The loader stabilization module includes: port SP for connecting to an accumulator; port B for connecting to the large chamber of the loader boom cylinder; port S for connecting to the small chamber of the loader boom cylinder; and a solenoid directional valve and a logic valve for balancing the pressure between the accumulator and the large chamber of the boom cylinder before the loader stabilization module is activated. Port SP is connected to port 1 of solenoid directional valve 1, port 1 of the logic valve, and port 1 of solenoid directional valve 2, respectively. Port 3 of solenoid directional valve 1 is connected to the control end of the logic valve, and the spring chamber of the logic valve is connected to port B. Port 2 of solenoid directional valve 2 is connected to port B. Port 2 of solenoid directional valve 3 is connected to port S. This invention does not affect the boom settlement and avoids the problem of sudden boom lifting and shaking caused by the pressure inconsistency between the large chamber of the boom and the accumulator at the moment of activation.

Description

Technical Field

[0001] This invention belongs to the field of loader technology, specifically relating to a loader stabilization module, a hydraulic system, and a loader. Background Technology

[0002] Loading machinery, as engineering equipment used for loading and transferring materials, often experiences bumpy rides and material spillage during site transfers due to uneven road surfaces, leading to a poor driver experience. Therefore, to improve driver comfort and reduce spillage, drivers often reduce vehicle speed, which in turn lowers the overall machine efficiency.

[0003] Small loaders typically employ stabilization modules to address the bumpy conditions during transit. The basic principle is to utilize the hydraulic springs of an accumulator to absorb vibrations from the working device during the loader's journey, thus enabling the small loader to travel quickly and smoothly.

[0004] Small loaders typically have low operating flow rates, small cylinders and accumulators, and relatively compact overall space. Existing stabilization module systems are generally simple in principle, using electromagnetic reversing valves, adjustable flow valves, and accumulators. However, the following problems exist: 1. When the adjustable flow valve opening is reduced, the pressure will momentarily exceed the boom chamber pressure due to the continuous filling of the accumulator when the stabilization module is activated, causing the boom to suddenly lift, affecting safety and comfort; 2. When the adjustable flow valve opening is reduced, the boom chamber is connected to the accumulator for depressurization, resulting in increased boom settlement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a loader stabilization module, a hydraulic system, and a loader that does not affect the boom settlement and avoids the problem of sudden boom lifting and shaking caused by the inconsistency between the pressure in the boom's large chamber and the pressure in the accumulator at the moment of opening.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, a loader stabilization module is provided, comprising: an oil port SP for connecting to an accumulator; an oil port B for connecting to the large chamber of the loader boom cylinder; an oil port S for connecting to the small chamber of the loader boom cylinder; a solenoid directional valve and a logic valve for balancing the pressure between the accumulator and the large chamber of the boom cylinder before the loader stabilization module is activated; the oil port SP is connected to the first oil port of the solenoid directional valve, the first oil port of the logic valve, and the first oil port of the solenoid directional valve II, respectively; the second oil port of the solenoid directional valve, the second oil port of the logic valve, and the first oil port of the solenoid directional valve III are respectively connected to a return oil port T; the third oil port of the solenoid directional valve I is connected to the control end of the logic valve, and the spring chamber of the logic valve is connected to the oil port B; the second oil port of the solenoid directional valve II is connected to the oil port B; and the second oil port of the solenoid directional valve III is connected to the oil port S.

[0008] Furthermore, when the electromagnets A1, A2, and A3 of the electromagnetic directional valves are all de-energized, the hydraulic oil in the large chamber of the loader boom cylinder fills the accumulator, while the hydraulic oil in the accumulator is cut off; the hydraulic oil in the small chamber of the loader boom cylinder is cut off by the electromagnetic directional valve; and the loader stabilization module is in a rigid state.

[0009] Furthermore, when the electromagnet A1 of the first solenoid directional valve is energized, while the electromagnets A2 of the second solenoid directional valve and A3 of the third solenoid directional valve are not energized, and the accumulator's charging pressure is greater than the sum of the pressure in the large chamber of the loading boom cylinder and the spring force in the logic valve's spring chamber, the logic valve switches to the connected position. The accumulator connects to the return port T through the logic valve, and the accumulator depressurizes until the accumulator's charging pressure is less than the sum of the pressure in the large chamber of the loading boom cylinder and the spring force in the logic valve's spring chamber. Then, the logic valve switches to the cut-off position, and the accumulator stops depressurizing.

[0010] Furthermore, when the accumulator stops depressurizing, the electromagnets A2 and A3 of the electromagnetic directional valve 2 and electromagnetic directional valve 3 are simultaneously energized. The large chamber of the loader boom cylinder is connected to the accumulator, and the small chamber of the loader boom cylinder is connected to the return oil port T. The loader stabilization module is in a flexible state, and the accumulator acts as a hydraulic spring.

[0011] Furthermore, it also includes an overflow valve, the inlet of which is connected to the oil port SP, and the outlet of which is connected to the return oil port T.

[0012] In a second aspect, a loader hydraulic system is provided, wherein the loader hydraulic system is equipped with the loader stabilization module described in the first aspect.

[0013] Furthermore, the loader hydraulic system includes an accumulator, which is connected to port SP of the loader stabilization module 20; the outlet of the working pump is connected to the inlet of the boom directional valve, and the working ports of the boom directional valve are respectively connected to ports B and S of the loader stabilization module and the large and small chambers of the boom cylinder.

[0014] Furthermore, it also includes a main relief valve, the inlet of which is connected to the outlet of the working pump, and the outlet of which is connected to the hydraulic oil tank.

[0015] Thirdly, a loader is provided, the loader being equipped with the loader hydraulic system described in the second aspect.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0017] (1) In this invention, under the pressure change of the large chamber of the boom cylinder, the pressure between the large chamber of the boom cylinder and the accumulator is balanced by the electromagnetic reversing valve and the logic valve at the moment the stabilization module is opened; to avoid the pressure between the large chamber of the boom cylinder and the accumulator being inconsistent at the moment of opening, which would cause the actuator to suddenly shake and affect safety and comfort.

[0018] (2) The present invention can avoid the problem of increased boom settlement caused by pressure leakage from the accumulator connected to the large chamber of the boom through the electromagnetic reversing valve and the logic valve;

[0019] (3) The present invention does not change the control method of the original stabilization module. It adopts electronic control and can select the rigid or flexible state of the stabilization module according to different working conditions, so that the whole system can operate stably under multiple working conditions and there is no jitter.

[0020] (4) Considering the limited assembly space of small loading machinery, the loader stabilization module disclosed in this invention uses plug-in components, which can meet the working flow requirements of the whole machine while greatly reducing the component volume, with a high degree of integration, small space occupation, and more flexible layout;

[0021] (5) Compared with existing technologies, the accumulator will not be frequently filled and drained as the boom cylinder extends and retracts, which can greatly improve the service life of the accumulator. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the principle of a loader stabilization module provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a loader hydraulic system provided in an embodiment of the present invention;

[0024] In the diagram: 20. Loader stabilization module; 1. Solenoid directional valve one; 2. Solenoid directional valve two; 3. Solenoid directional valve three; 4. Logic valve; 5. Relief valve; 6. Accumulator; 7. Boom cylinder; 8. Boom directional valve; 9. Working pump; 10. Main relief valve; 11. Hydraulic oil tank. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1As shown, a loader stabilization module includes: an oil port SP for connecting to an accumulator; an oil port B for connecting to the large chamber of the loader boom cylinder; an oil port S for connecting to the small chamber of the loader boom cylinder; an electromagnetic directional valve 1 and a logic valve 4 for balancing the pressure between the accumulator and the large chamber of the boom cylinder before the loader stabilization module is activated; oil port SP is connected to oil port 1 of electromagnetic directional valve 1, oil port 1 of logic valve 4, and oil port 1 of electromagnetic directional valve 2, respectively; oil port 2 of electromagnetic directional valve 1, oil port 2 of logic valve 4, and oil port 1 of electromagnetic directional valve 3 are connected to a return oil port T, respectively; oil port 3 of electromagnetic directional valve 1 is connected to the control end of logic valve 4, and the spring chamber of logic valve 4 is connected to oil port B; oil port 2 of electromagnetic directional valve 2 is connected to oil port B; and oil port 2 of electromagnetic directional valve 3 is connected to oil port S.

[0028] In this invention, electromagnetic directional valve 1 is a two-position three-way valve, electromagnetic directional valve 2 and electromagnetic directional valve 3 are two-position two-way electromagnetic directional valves, and logic valve 4 is a two-position two-way hydraulic control logic valve.

[0029] The left end of the solenoid directional valve 1 is equipped with a spring, which is connected to the return port T. The right end of the solenoid directional valve 1 is equipped with an electromagnet A1. The solenoid directional valve 1 has a left working position and a right working position. When the electromagnet A1 of the solenoid directional valve 1 is not energized, the solenoid directional valve 1 works in the left working position. At this time, the accumulator oil is cut off at one of the oil ports of the solenoid directional valve 1. The right end of the logic valve 4 is connected to the second oil port of the solenoid directional valve 1 through the third oil port of the solenoid directional valve 1, and then connected to the return port T. When the electromagnet A1 of the solenoid directional valve 1 is energized, the solenoid directional valve 1 works in the right working position. At this time, the return port T is cut off at the second oil port of the solenoid directional valve 1. The accumulator oil is connected to the third oil port of the solenoid directional valve 1 through the first oil port of the solenoid directional valve 1, and then connected to the right end (control end) of the logic valve 4.

[0030] The left end of the electromagnetic directional valve 2 is equipped with an electromagnet A2, and the right end of the electromagnetic directional valve 2 is equipped with a spring, which is connected to the return oil port T. The electromagnetic directional valve 2 has a left working position and a right working position. When the electromagnet A2 of the electromagnetic directional valve 2 is not energized, the electromagnetic directional valve 2 works in the right position. At this time, the large chamber of the boom cylinder is connected to the accumulator through the oil port B, the oil port 2 of the electromagnetic directional valve 2, the one-way valve connection (right working position) of the electromagnetic directional valve 2, the oil port 1 of the electromagnetic directional valve 2, and the oil port SP. Furthermore, when the electromagnetic directional valve 2 is in the right position, the large chamber of the boom cylinder can be charged to the accumulator through the one-way valve of the electromagnetic directional valve 2, while the oil in the accumulator is cut off at the one-way valve of the electromagnetic directional valve 2; when the electromagnet A2 of the electromagnetic directional valve 2 is energized, the electromagnetic directional valve 2 is in the left position, at which time the large chamber of the boom cylinder is directly connected to the accumulator through port B, port 2 of the electromagnetic directional valve 2, port 1 of the electromagnetic directional valve 2, and port SP, and the oil in the accumulator can be directly connected to the large chamber of the boom cylinder.

[0031] The left end of the electromagnetic directional valve 3 is equipped with an electromagnet A3, and the right end of the electromagnetic directional valve 3 is equipped with a spring, which is connected to the return oil port T. The electromagnetic directional valve 3 has a left working position and a right working position. When the electromagnet A3 of the electromagnetic directional valve 3 is not energized, the electromagnetic directional valve 3 operates in the right position. At this time, the small chamber of the boom cylinder is connected to the return oil port T through oil port S, oil port II of the electromagnetic directional valve 3, the one-way valve connection (right working position) of the electromagnetic directional valve 3, and oil port I of the electromagnetic directional valve 3. Furthermore, when the electromagnetic directional valve 3 operates in the right position, the oil in the small chamber of the boom cylinder is cut off through the one-way valve connection of the electromagnetic directional valve 3. When the electromagnet A3 of the electromagnetic directional valve 3 is energized, the electromagnetic directional valve 3 operates in the left working position. At this time, the oil port of the small chamber of the boom cylinder is directly connected to the return oil port T through oil port II and oil port I of the electromagnetic directional valve 3.

[0032] The logic valve 4 has a left position and a right position. When the control oil pressure at the right end of the logic valve 4 is less than the sum of the control oil pressure at the left end (the pressure in the large chamber of the boom cylinder) and the spring force at the left end, the logic valve 4 works in the left position, and the accumulator oil is cut off at the logic valve 4. When the control oil pressure at the right end of the logic valve 4 is greater than the sum of the control oil pressure at the left end and the spring force at the left end, the logic valve 4 works in the right position, and the accumulator oil is connected through the logic valve 4 and then connected to the return oil port T.

[0033] When the electromagnets A1, A2, and A3 of the electromagnetic directional valves are all de-energized, the hydraulic oil in the large chamber of the loader boom cylinder fills the accumulator, while the hydraulic oil in the accumulator is cut off; the hydraulic oil in the small chamber of the loader boom cylinder is cut off by the electromagnetic directional valve 3; the loader stabilization module is in a rigid state and will not play a role in damping the working boom during the machine's operation. At the same time, since the accumulator oil is cut off, the settlement of the boom will not be affected.

[0034] When the electromagnet A1 of solenoid directional valve one is energized, while the electromagnets A2 of solenoid directional valve two and A3 of solenoid directional valve three are de-energized, and the accumulator's charging pressure is greater than the sum of the pressure in the large chamber of the loader boom cylinder and the spring force in the logic valve spring chamber, logic valve 4 switches to the connected position. The accumulator connects to the return port T through logic valve 4, and the accumulator depressurizes until the accumulator's charging pressure is less than the sum of the pressure in the large chamber of the loader boom cylinder and the spring force in the logic valve spring chamber. Then, logic valve 4 switches to the cut-off position, the accumulator oil is cut off, and the accumulator stops depressurizing. This achieves a balance between the accumulator pressure and the large chamber pressure of the boom, avoiding the problem of momentary boom jumps when the stabilization module function is activated due to the large difference between the accumulator pressure and the large chamber pressure.

[0035] When the accumulator stops depressurizing, the electromagnets A2 and A3 of the electromagnetic reversing valve 2 and electromagnetic reversing valve 3 are simultaneously energized. The large chamber of the loader boom cylinder is connected to the accumulator, and the small chamber of the loader boom cylinder is connected to the return oil port T. The loader's stabilization module is in a flexible state, and the accumulator acts as a hydraulic spring, playing a role in vibration damping and buffering when the machine is in motion, thus improving the comfort of transport and driving.

[0036] This invention achieves a balance between the pressure in the boom's large chamber and the accumulator when the stabilization module is activated by controlling the energization sequence of the three electromagnetic reversing valves. This ensures that the stabilization module is in a flexible state, preventing the accumulator from being charged and discharged in real time and increasing its lifespan.

[0037] This invention achieves pressure balance through a two-position three-way solenoid directional valve and a two-position two-way logic valve. When the stabilization module is to be activated, the oil circuit is first switched to balance the pressure of the accumulator and the large chamber of the boom. Then, the two two-position two-way solenoid directional valves are controlled to switch, connecting the large chamber of the boom and the accumulator, and returning oil to the small chamber of the boom for travel vibration damping. This will not affect the boom settlement and will also avoid the inconsistency between the pressure in the rodless chamber and the accumulator at the moment of activation, which would cause the boom to suddenly lift and shake, affecting comfort.

[0038] Example 2

[0039] The only difference between this embodiment and Embodiment 1 is that this embodiment also includes an overflow valve 5. The inlet of the overflow valve 5 is connected to the oil port SP, and the outlet of the overflow valve 5 is connected to the return oil port T. Embodiment 1 is applicable to loader hydraulic systems with an overload valve installed in the large chamber oil circuit of the boom cylinder, while this embodiment is applicable to loader hydraulic systems without an overload valve installed in the large chamber oil circuit of the boom cylinder.

[0040] The accumulator is connected to the return port T via the overflow valve 5. The inlet of the overflow valve 5 is connected to the accumulator, and the outlet of the overflow valve 5 is connected to the return port T. This allows the accumulator to release excessive pressure when the pressure in the accumulator 6 is too high, thus preventing the equipment from being subjected to high pressure and extending the equipment's lifespan.

[0041] Example 3

[0042] Based on the loader stabilization module described in Embodiment 1 and Embodiment 2, this embodiment provides a loader hydraulic system, which is configured with the loader stabilization module described in Embodiment 1 or Embodiment 2.

[0043] like Figure 2 As shown, in addition to the loader stabilization module 20 described in Embodiment 1, it also includes an accumulator 6, a boom cylinder 7, a boom reversing valve 8, a working pump 9, a main relief valve 10, and a hydraulic oil tank 11.

[0044] The working pump 9 is a gear pump. The outlet of the working pump 9 is connected to the inlet of the main relief valve 10 and to the inlet P of the boom directional valve 8. The working port b of the boom directional valve 8 is connected to the large chamber of the boom cylinder 7 and to the port B of the loader stabilization module 20. The working port a of the boom directional valve 8 is connected to the small chamber of the boom cylinder 7 and to the port S of the loader stabilization module 20. The port SP of the loader stabilization module 20 is connected to the accumulator 6. The return port T of the loader stabilization module 20, the return port T1 of the boom directional valve 8, the return port of the main relief valve 10, and the suction port of the working pump 9 are all connected to the hydraulic oil tank 11.

[0045] When loading machinery performs shoveling, stacking and other working operations, the boom reversing valve 8 is operated to switch left and right directions, which controls the extension and retraction of the piston rod of the boom cylinder 7, thereby controlling the lifting and lowering of the working device of the loading machinery.

[0046] When the stabilization module function is not required, the solenoids A1, A2, and A3 of solenoid directional valve 1, solenoid directional valve 2, and solenoid directional valve 3 are all de-energized. At this time, solenoid directional valve 1 operates in the left position, solenoid directional valve 2 operates in the right position, and solenoid directional valve 3 operates in the right position. Meanwhile, the right end of logic valve 4 is connected to oil port 3 through oil port 2 of solenoid directional valve 1, and further connected to the return oil port T. Logic valve 4 operates in the left position. Furthermore, the boom cylinder... The accumulator 6 is filled with oil from the seven large chambers, while the oil in the accumulator 6 is cut off at one of the oil ports of the solenoid directional valve 1, the one-way valve connection in the solenoid directional valve 2, and the oil port of the logic valve 4. The oil in the small chamber of the boom cylinder 7 is cut off at the one-way valve connection in the solenoid directional valve 3. Therefore, the loader stabilization module 20 is in a rigid state and will not play the role of damping the working boom during the operation of the whole machine. At the same time, since the oil in the accumulator is cut off, the settlement of the boom can be guaranteed not to be affected.

[0047] When the stabilization module function needs to be activated, the electromagnet A1 of the first solenoid directional valve needs to be energized first. After a period of time (i.e., after the oil pressure of the accumulator 6 and the large chamber of the boom cylinder 7 is balanced), the electromagnets A2 of the second solenoid directional valve and A3 of the third solenoid directional valve need to be energized simultaneously.

[0048] When solenoid A1 of solenoid directional valve one is energized, while solenoid A2 of solenoid directional valve two and solenoid A3 of solenoid directional valve three are not energized, solenoid directional valve 1, solenoid directional valve 2, and solenoid directional valve 3 are all in the right position. The right end of logic valve 4 is connected to port 1 of solenoid directional valve 1 through port 3, and then to accumulator 6 through port SP. When the filling pressure of accumulator 6 is greater than the sum of the pressure in the large chamber of boom cylinder 7 and the spring force at the left end of logic valve 4, When logic valve 4 is in the right position, the oil in accumulator 6 is connected to the return port T through logic valve 4, and accumulator 6 is depressurized until the filling pressure of accumulator 6 is less than the sum of the pressure in the large chamber of the boom cylinder and the spring force at the left end of logic valve 4. Then logic valve 4 is in the left position, and the oil in accumulator 6 is cut off. This achieves the balance between the accumulator pressure and the large chamber pressure of the boom, avoiding the problem of the boom jumping momentarily when the stabilization module function is activated due to the large difference between the accumulator pressure and the large chamber pressure of the boom.

[0049] When solenoid A1 of solenoid directional valve one remains energized, after a period of time (i.e., after the oil pressure in the accumulator 6 and the large chamber of the boom cylinder 7 is balanced), when solenoid A2 of solenoid directional valve two and solenoid A3 of solenoid directional valve three are simultaneously energized, solenoid directional valve 1 operates in the right position, solenoid directional valve 2 operates in the left position, and solenoid directional valve 3 operates in the left position. At this time, the right end of logic valve 4, through port three and port one of solenoid directional valve 1, and port one and port two of solenoid directional valve 2, connects with... The large chamber of the boom cylinder is connected, and the logic valve 4 operates in the left position under the action of the spring force. The oil in the large chamber of the boom cylinder 7 is connected to the accumulator 6 through the solenoid directional valve 2, while the oil in the accumulator 6 is cut off at the oil port of the logic valve 4. The oil in the small chamber of the boom cylinder 7 is connected to the return oil port T through the solenoid directional valve 3. Therefore, the loader stabilization module 20 is in a flexible state. The accumulator 6 acts as a hydraulic spring, which plays a role in vibration damping and buffering when the whole machine is running, thereby improving the comfort of transportation and driving.

[0050] In summary, this invention balances the pressure between the large chamber of the boom cylinder and the accumulator at the moment the stabilization module opens under pressure changes in the large chamber of the boom cylinder. This avoids the pressure inconsistency between the large chamber of the boom cylinder and the accumulator at the moment of opening, which could cause sudden vibration of the actuator, affecting safety and comfort. Furthermore, the electromagnetic reversing valve and the logic valve prevent the large chamber of the boom cylinder from connecting to the accumulator and releasing pressure, thus avoiding an increase in boom settlement.

[0051] Meanwhile, this invention does not change the original control method of the stabilization module. It adopts electronic control and can select the rigid or flexible state of the stabilization module to be triggered according to different working conditions, so that the whole machine system operates stably under multiple working conditions without shaking. Considering the limited assembly space of small loading machinery, the loader stabilization module of this invention uses plug-in components, which meets the working flow requirements of the whole machine while significantly reducing the component volume, with a high degree of integration, small space occupation, and more flexible layout. Compared with the prior art, the accumulator will not frequently charge and discharge with the extension and retraction of the boom cylinder, which can significantly improve the service life of the accumulator.

[0052] Example 4

[0053] Based on Embodiments 1 to 3, this embodiment provides a loader, which is equipped with the loader stabilization module described in any one of Embodiments 1 to 2 or the loader hydraulic system described in Embodiment 3.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A loader stabilization module, characterized in that, include: SP is used to connect the accumulator. Oil port B is used to connect to the large chamber of the loading boom cylinder; Oil port S is used to connect to the small chamber of the hydraulic cylinder of the loading boom; Electromagnetic directional valve (1) and logic valve (4) are used to balance the pressure between the accumulator and the large chamber of the boom cylinder before the loader stabilization module is opened. The oil port SP is connected to the oil port 1 of the solenoid directional valve 1 (1), the oil port 1 of the logic valve (4), and the oil port 1 of the solenoid directional valve 2 (2), respectively. The oil port 2 of the electromagnetic reversing valve 1 (1), the oil port 2 of the logic valve (4), and the oil port 1 of the electromagnetic reversing valve 3 (3) are respectively connected to the return oil port T. The oil port 3 of the electromagnetic reversing valve (1) is connected to the control end of the logic valve (4), and the spring chamber of the logic valve (4) is connected to the oil port B. The second oil port of the electromagnetic reversing valve (2) is connected to the oil port B; the second oil port of the electromagnetic reversing valve (3) is connected to the oil port S. When the electromagnets A1, A2, and A3 of the electromagnetic directional valves are all de-energized, the hydraulic oil in the large chamber of the loader boom cylinder fills the accumulator, while the hydraulic oil in the accumulator is cut off; the hydraulic oil in the small chamber of the loader boom cylinder is cut off by the electromagnetic directional valve (3); the loader stabilization module is in a rigid state. When the electromagnet A1 of the first solenoid directional valve is energized, the electromagnets A2 and A3 of the second and third solenoid directional valves are not energized, and the accumulator's charging pressure is greater than the sum of the pressure of the large chamber of the loading boom cylinder and the spring force of the logic valve spring chamber, the logic valve (4) switches to the connected position, the accumulator connects to the return port T through the logic valve (4), the accumulator depressurizes, until the accumulator's charging pressure is less than the sum of the pressure of the large chamber of the loading boom cylinder and the spring force of the logic valve spring chamber, the logic valve (4) switches to the cut-off position, and the accumulator stops depressurizing; When the accumulator stops depressurizing, the electromagnets A2 and A3 of the electromagnetic reversing valve 2 and electromagnetic reversing valve 3 are simultaneously energized. The large chamber of the loader boom cylinder is connected to the accumulator, and the small chamber of the loader boom cylinder is connected to the return oil port T. The loader stabilization module is in a flexible state, and the accumulator acts as a hydraulic spring.

2. The loader stabilization module according to claim 1, characterized in that, It also includes an overflow valve (5), the inlet of which is connected to the oil port SP, and the outlet of which is connected to the return oil port T.

3. A hydraulic system for a loader, characterized in that, The loader hydraulic system is equipped with the loader stabilization module as described in any one of claims 1 to 2.

4. The loader hydraulic system according to claim 3, characterized in that, The loader hydraulic system includes an accumulator (6), which is connected to the oil port SP of the loader stabilization module 20; the outlet of the working pump (9) is connected to the inlet of the boom reversing valve (8), and the working oil port of the boom reversing valve (8) is connected to the oil port B and oil port S of the loader stabilization module (20) and the large and small chambers of the boom cylinder (7).

5. The loader hydraulic system according to claim 4, characterized in that, It also includes a main relief valve (10), the inlet of which is connected to the outlet of the working pump (9), and the outlet of which is connected to the hydraulic oil tank (11).

6. A loader, characterized in that, The loader is equipped with the loader hydraulic system as described in any one of claims 3 to 5.

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