A loader stabilization module, a hydraulic system, and a loader

Abstract

This invention discloses a loader stabilization module, a hydraulic system, and a loader. The main valve core includes a first oil port for connecting to an oil source, a second oil port for connecting to the rodless chamber of the boom cylinder, a third oil port for connecting to the rod chamber of the boom cylinder, a fourth oil port for connecting to an accumulator, and a fifth oil port for connecting to a return oil port T. The pressure balancing valve core includes a second oil port for connecting to the accumulator and a first oil port for connecting to the return oil port T. The first control end of the pressure balancing valve core is connected to the second oil port of the main valve. The electromagnetic directional valve includes a first oil port for connecting to the accumulator, a second oil port for connecting to the return oil port T, and a third oil port for connecting the second control end of the main valve core and the second control end of the pressure balancing valve core. The electromagnetic directional valve is used to control the connection state between the accumulator and the return oil port T, thereby balancing the pressure between the rodless chamber of the boom cylinder and the accumulator. This invention balances the pressure between the rodless chamber oil circuit and the accumulator based on the pressure change of the rodless chamber in the hydraulic system, avoiding sudden vibration of the actuators caused by the inconsistency between the pressure in the rodless chamber and the accumulator when the stabilization module is opened, thus improving driving comfort and overall machine efficiency.

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] Loaders, as construction machinery used for loading and transporting materials, often experience bumpy rides and material spillage during site transport due to uneven road surfaces, leading to a poor driver experience. Therefore, to improve driver comfort and reduce spillage, drivers often reduce speed, which in turn lowers the overall machine's efficiency.

[0003] The existing stabilization system has the following problems: 1. When the stabilization module is activated, the pressure in the rodless chamber is inconsistent with the pressure in the accumulator, causing the boom to suddenly shake and affecting comfort; 2. The accumulator charging is connected to the boom cylinder, which means that the selected solenoid directional valve and other components must meet high-pressure conditions. Currently, high-pressure components are mainly imported, which is not economical; 3. The charging and releasing of the accumulator requires multiple solenoid directional valves, which is complex in structure and has large pressure loss, making it unsuitable for large-tonnage loaders. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a loader stabilization module, a hydraulic system, and a loader. The loader balances the pressure between the rodless chamber oil circuit and the accumulator based on the pressure changes in the rodless chamber of the hydraulic system, preventing sudden vibrations of the actuators caused by the inconsistency between the pressure in the rodless chamber and the accumulator when the stabilization module is activated. This improves driving comfort and overall machine efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, a loader stabilization module is provided, comprising a main valve core, a pressure balancing valve core, and a solenoid directional valve. The main valve core includes: a first main valve port for connecting to an oil source, a second main valve port for connecting to the rodless chamber of the boom cylinder, a third main valve port for connecting to the rod chamber of the boom cylinder, a fourth main valve port for connecting to an accumulator, and a fifth main valve port for connecting to a return port T. The pressure balancing valve core includes: a second balancing valve port for connecting to the accumulator and a first balancing valve port for connecting to the return port T. A first control terminal of the pressure balancing valve core is connected to the second main valve port. The solenoid directional valve includes: a first directional valve port for connecting to the accumulator, a second directional valve port for connecting to the return port T, and a third directional valve port for connecting the second control terminal of the main valve core and the second control terminal of the pressure balancing valve core. The solenoid directional valve is used to control the connection state between the accumulator and the return port T by adjusting the position of the pressure balancing valve core, thereby balancing the pressure between the rodless chamber of the boom cylinder and the accumulator.

[0007] Furthermore, a second spring is provided at the first control end of the pressure balancing valve core to control the opening degree of the pressure balancing valve core according to the pressure and flow rate. When the pressure at the second oil port of the main valve and the oil circuit of the rodless chamber of the boom cylinder is greater than the pressure of the accumulator, the second spring acts on the pressure balancing valve core to keep the first oil port and the second oil port of the balancing valve in the cut-off position, thereby preventing the pressure of the accumulator from being released to the return oil port T. When the pressure at the second oil port of the main valve and the oil circuit of the rodless chamber of the boom cylinder is less than the pressure of the accumulator, the second spring acts on the pressure balancing valve core to keep the first oil port and the second oil port of the balancing valve in the connected position, thereby allowing the accumulator to release pressure to the return oil port T through the pressure balancing valve core until the pressure of the rodless chamber of the boom cylinder is consistent with the pressure of the accumulator.

[0008] Furthermore, a first spring is provided at the first control end of the main valve core, and the main valve core also has a left working position and a right working position; the switching between the left and right working positions of the main valve core is controlled by a solenoid directional valve and the first spring; when the solenoid directional valve is not energized, the third oil port of the directional valve is connected to the return oil port T through the second oil port of the directional valve, and under the action of the first spring, the main valve core is in the right working position, the rodless chamber of the boom cylinder and the accumulator are in a cut-off state, and the rod chamber of the boom cylinder and the return oil port T are in a cut-off state, so that... The stabilizing module is in a rigid state. At the same time, hydraulic oil enters the accumulator through the first and fourth ports of the main valve to fill the accumulator. When the solenoid directional valve is energized, the third port of the directional valve is connected to the accumulator through the first port of the directional valve. The hydraulic oil in the accumulator acts on the second control end of the main valve core, causing the main valve core to switch to the left position. The rodless chamber of the boom cylinder is connected to the accumulator, and the rod chamber of the boom cylinder is connected to the return port T, so that the stabilizing module is in a flexible state.

[0009] Furthermore, the first control end of the pressure balancing valve core is connected to the second oil port of the main valve through the first damper, and the second control end of the pressure balancing valve core is connected to the second control end of the main valve core through the second damper. When the electromagnetic reversing valve is energized, the reversing sequence of the pressure balancing valve core and the main valve core is changed by utilizing the difference in magnitude between the first damper and the second damper. This allows the pressure between the rodless chamber of the boom cylinder and the accumulator to be balanced first when the stabilizing module is opened, and then the stabilizing module to be in a flexible state. This is used to avoid real-time charging and discharging of the accumulator and to increase the lifespan of the accumulator.

[0010] Furthermore, it also includes a one-way valve connected in parallel with the second damper, wherein the oil inlet of the one-way valve is connected to the second control end of the main valve core, and the oil outlet of the one-way valve is connected to the second control end of the pressure balance valve core.

[0011] Furthermore, it also includes a safety valve, the oil inlet of which is connected to the accumulator, and the oil outlet of which is connected to the return port T.

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

[0013] Furthermore, it also includes a gear pump, the inlet of which is connected to the hydraulic oil tank, and the outlet of which is connected to the first port of the main valve through the inlet P of the stabilization module; the accumulator is connected to the fourth port of the main valve through the X port of the stabilization module; the return port T of the stabilization module is connected to the hydraulic oil tank; the rodless chamber of the boom cylinder is connected to the second port of the main valve through the working port A of the stabilization module, and the rod chamber of the boom cylinder is connected to the third port of the main valve through the working port B of the stabilization module.

[0014] Furthermore, it also includes a filling valve connected between the oil outlet of the gear pump and the oil inlet P of the stabilization module.

[0015] Thirdly, a loader is provided, the loader being equipped with the loader stabilization module described in the first aspect.

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

[0017] (1) This invention sets up a main valve core, a pressure balance valve core and an electromagnetic directional valve. The electromagnetic directional valve controls the connection state between the accumulator and the return port T by adjusting the position of the pressure balance valve core. This balances the pressure between the rodless chamber oil circuit and the accumulator according to the pressure change of the rodless chamber of the hydraulic system, avoiding the sudden vibration of the actuator caused by the inconsistency between the pressure of the rodless chamber and the pressure of the accumulator when the stabilization module is opened. This improves driving comfort and overall machine efficiency.

[0018] (2) The opening sequence of the pressure-balanced valve core and the main valve core is achieved by utilizing the magnitude of damping, thereby reducing the number of solenoid valves and lowering costs.

[0019] (3) Select the rigid or flexible state of the trigger stabilization module according to different working conditions to make the whole system run stably under multiple working conditions without shaking;

[0020] (4) It adopts a slide valve structure, which can withstand high pressure and large flow, and meet the needs of large tonnage stable modules. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the principle of a loader stabilization module provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of a loader hydraulic system provided in an embodiment of the present invention;

[0023] In the diagram: 1. Hydraulic oil tank; 2. Accumulator; 3. Boom cylinder; 4. Gear pump; 5. Stabilizing module; 51. Main valve core; 52. Pressure balance valve core; 53. Solenoid directional valve; 54. First damper; 55. Second spring; 56. First spring; 57. Second damper; 80. Main valve first port; 81. Main valve second port; 82. Main valve third port; 83. Main valve fourth port; 84. Main valve fifth port; 85. Directional valve first port; 86. Directional valve second port; 87. Directional valve third port; 88. Balance valve first port; 89. Balance valve second port; 6. Filling valve. Detailed Implementation

[0024] 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.

[0025] Example 1:

[0026] like Figure 1 , Figure 2 As shown, a loader stabilization module includes: a main valve core 51, an accumulator 2, a solenoid directional valve 53, and a pressure balance valve core 52.

[0027] The main valve core 51 is a two-position five-way valve core, the five-way including: main valve first oil port 80, main valve second oil port 81, main valve third oil port 82, main valve fourth oil port 83, and main valve fifth oil port 84; the main valve core 51 is connected to the rodless chamber oil circuit of the boom cylinder 3 through the main valve second oil port 81, the main valve core 51 is connected to the rod chamber of the boom cylinder 3 through the main valve third oil port 82, the main valve core 51 is connected to the accumulator 2 through the main valve fourth oil port 83, and the main valve fifth oil port 84 is connected to the return oil port T; the main valve core 51 is connected to the gear pump 4 through the main valve first oil port 80; the right end (first control end) of the main valve core 51 is provided with a first spring 56, which is connected to the return oil port T. The main valve core 51 also has a left position and a right position. The switching between the left and right positions of the main valve core 51 is controlled by the solenoid directional valve 53 and the first spring 56. When the solenoid directional valve 53 is not energized, the second oil port 86 of the solenoid directional valve 53 is connected to the third oil port 87 of the solenoid directional valve 53. The second oil port 86 of the solenoid directional valve 53 is connected to the return oil port T. The third oil port 87 of the solenoid directional valve 53 is connected to the left end (second control end) of the main valve core 51 through the second damper 57. At this time, the left end of the main valve core 51 is also connected to the return oil port T. Under the action of the first spring 56, the main valve core 51 is in the right position. At this time, the gear pump 4 is connected to the first oil port 80 and the fourth oil port 83 of the main valve core 51, and is connected to the accumulator 2 to form a liquid filling state. The main valve second port 81 and the main valve third port 82 of the main valve core 51 are both in the cut-off state, thus making the stabilizing module 5 in a rigid state.

[0028] When the solenoid directional valve 53 is energized, its second port 86 is in the off state. The first port 85 of the directional valve is connected to the third port 87 of the solenoid directional valve 53. The first port 85 of the solenoid directional valve 53 is connected to the accumulator 2 via port X. The third port 87 of the solenoid directional valve 53 is connected to the left end (second control end) of the main valve core 51 via the second damper 57. This also connects the left end of the main valve core 51 to the accumulator 2 via port X. The pressure at port X connected to the accumulator 2 is greater than that of the first spring 56, causing the main valve core 51 to be in the left position. At this time, the gear pump 4 is in the off state with the first port 80 of the main valve core 51. The second port 81 of the main valve core 51 is connected to the accumulator 2 via port X, and the third port 82 of the main valve core 51 is connected to the return port T, making the stabilizing module 5 in a flexible state.

[0029] The electromagnetic directional valve 53 includes: a first port 85, a second port 86, and a third port 87. The electromagnetic directional valve 53 is connected to the left end of the main valve core 51 via the third port 87 and the second damper 57. The electromagnetic directional valve 53 is connected to the accumulator 2 via the first port 85 and the return port T via the second port 86.

[0030] The pressure balancing valve core 52 is a two-position, two-way valve. The first oil port 88 of the pressure balancing valve core 52 is connected to the return oil port T, and the second oil port 89 of the pressure balancing valve core 52 is connected to the accumulator 2. When the pressure balancing valve core 52 is in the upper position, the first oil port 88 and the second oil port 89 of the pressure balancing valve core 52 are in the closed state; when the pressure balancing valve core 52 is in the lower position, the first oil port 88 and the second oil port 89 of the pressure balancing valve core 52 are in the connected state, thereby balancing the pressure between the rodless chamber oil circuit of the boom cylinder 3 and the accumulator 2.

[0031] Preferably, the upper end (first control end) of the pressure balancing valve core 52 is provided with a second spring 55, the upper control oil circuit is connected to the main valve second oil port 81 of the main valve core 51, and a first damping 54 is provided between the upper control oil circuit of the pressure balancing valve core 52 and the main valve second oil port 81 of the main valve core 51 to eliminate pressure pulsation of the main valve second oil port 81 of the main valve core 51. When the solenoid directional valve 53 is energized, the pressure of the accumulator 2 acts on the lower end (second control end) of the pressure balancing valve core 52. If the pressure of the accumulator 2 is greater than the sum of the pressures of the main valve second oil port 81 and the second spring 55 of the main valve core 51, the pressure balancing valve core 52 is in the lower working position, connecting the accumulator 2 and the return oil port T through the first oil port 88 and the second oil port 89 of the balancing valve of the pressure balancing valve core 52, releasing the pressure of the accumulator 2 into the return oil port T. The accumulator 2 releases pressure to the return oil port T through the pressure balancing valve core 52 until the pressure in the rodless chamber of the boom cylinder 3 is consistent with the pressure of the accumulator 2, thereby achieving the purpose of balancing the pressure between the rodless chamber of the boom cylinder 3 and the accumulator 2.

[0032] When the pressure at the second oil port 81 of the main valve core 51 is greater than the pressure at the accumulator 2, the pressure balancing valve core 52 is switched to the upper position. The first oil port 88 and the second oil port 89 of the balancing valve core 52 are in the closed state, so that the pressure of the accumulator 2 cannot be released into the return oil port T.

[0033] Preferably, a one-way valve 58 is provided at the left end of the main valve core 51, which is connected in parallel with the second damper 57. By utilizing the magnitude of the first damper 54 and the second damper 57, the switching of the main valve core 51 is delayed compared to the switching of the pressure balancing valve core 52, thereby balancing the pressure between the rodless chamber of the boom cylinder 3 and the accumulator 2, reducing the number of releases of the accumulator 2, and extending the life of the accumulator 2.

[0034] Preferably, the accumulator 2 is connected to the return port T via a safety valve 59. The inlet of the safety valve 59 is connected to the accumulator 2, and the return port of the safety valve 59 is connected to the return port T. This allows the accumulator 2 to release excessive pressure when the pressure is too high, thus preventing the equipment from being subjected to high pressure and extending the equipment's lifespan.

[0035] Preferably, the pressure balancing valve is a proportional valve used for precise and continuous control of the pressure balancing valve core 52 based on the pressure and flow of the hydraulic system.

[0036] like Figure 2As shown, the inlet of gear pump 4 is connected to hydraulic oil tank 1, and the outlet of gear pump 4 is connected to the first oil port 80 of main valve through the inlet P of stabilization module 5; accumulator 2 is connected to the fourth oil port 83 of main valve through the X oil port of stabilization module 5; return oil port T of stabilization module 5 is connected to hydraulic oil tank 1; rodless chamber of boom cylinder 3 is connected to the second oil port 81 of main valve through the working oil port A of stabilization module 5, and rod chamber of boom cylinder 3 is connected to the third oil port 82 of main valve through the working oil port B of stabilization module 5.

[0037] The working principle of the constant-variable hydraulic system in this embodiment is as follows:

[0038] The stabilization module 5 is in a rigid state: The activation logic of the stabilization module 5 is not triggered, meaning the solenoid directional valve 53 is not energized. The second port 86 of the solenoid directional valve 53 is connected to the third port 87, and the second port 86 is connected to the return port T. The third port 87 is connected to the left end of the main valve core 51 via the second damper 57. This also connects the left end of the main valve core 51 to the return port T, and the main valve core 51 is in the right position under the action of the first spring 56. At this time, the gear pump 4 is connected to the fourth port 83 of the main valve via the first port 80, forming a filling state with the accumulator 2. The second port 81 and the third port 82 of the main valve are both in the off state, thus the stabilization module 5 is in a rigid state.

[0039] When the stabilization module 5 is in a flexible state: The activation logic of the stabilization module 5 is triggered, meaning the solenoid directional valve 53 is energized. The second port 86 of the solenoid directional valve 53 is in the off state, while the first port 85 and the third port 87 of the directional valve are connected. The first port 85 is connected to the accumulator 2, and the third port 87 is connected to the left end of the main valve core 51 via the second damper 57. This also connects the left end of the main valve core 51 to the accumulator 2. The pressure in the accumulator 2 is greater than the pressure of the first spring 56, causing the main valve core 51 to be in the left position. At this time, the gear pump 4 and the first port 80 of the main valve core 51 are in the off state. The second port 81 of the main valve core 51 is connected to the accumulator 2, and the third port 82 of the main valve core 51 is connected to the return port T, putting the stabilization module 5 in a flexible state. This allows the boom cylinder 3 to reciprocate, achieving a shock absorption effect and significantly improving driver comfort.

[0040] Under certain special working conditions, such as during material stacking, the pressure in accumulator 2 may momentarily exceed the pressure in the rodless chamber of boom cylinder 3. When stabilizing module 5 is activated, i.e., solenoid directional valve 53 is energized, and the pressure in accumulator 2 exceeds the sum of the pressures of the second oil port 81 of the main valve core 51 and the second spring 55, pressure balancing valve core 52 is in the lower position. This connects accumulator 2 to the return oil port T through the first oil port 88 and the second oil port 89 of the balancing valve core 52, releasing the pressure in accumulator 2 into the return oil port T. The pressure is released from accumulator 2 through pressure balancing valve core 52 until the pressure in the rodless chamber of boom cylinder 3 matches the pressure in accumulator 2, thus achieving the purpose of balancing the pressures in the rodless chamber of boom cylinder and accumulator 2. This ensures that the entire system will not jump or shake due to the pressure in accumulator 2 exceeding the pressure in the rodless chamber at the moment stabilizing module 5 is activated.

[0041] Preferably, in this embodiment, the number of accumulators 2 is not limited to one. Selecting an appropriate number of accumulators 2 based on the parameters of the boom cylinder 3 is still within the protection scope of this invention.

[0042] In summary, this invention balances the pressure between the rodless chamber of the boom cylinder 3 and the accumulator 2 through the pressure balancing valve core 52 when the stabilizing module 5 is activated under pressure changes in the rodless chamber. This avoids pressure inconsistencies between the rodless chamber of the boom cylinder 3 and the accumulator 2 after activation, which could lead to sudden vibration of the actuator and affect comfort. The invention also allows for the selection of rigid or flexible states for triggering the stabilizing module 5 according to different working conditions, ensuring stable operation of the entire system under multiple working conditions without vibration. Furthermore, the addition of a filling valve 6 (…) Figure 2 A liquid filling limit is set to avoid the plug-in being subjected to high pressure, thereby extending the service life of the equipment and reducing equipment maintenance costs; a slide valve structure is adopted, which can withstand high pressure and large flow, meeting the needs of large tonnage stable module 5.

[0043] Example 2:

[0044] Based on the loader stabilization module described in Embodiment 1, this embodiment provides a loader hydraulic system, wherein the hydraulic system is configured with the loader stabilization module described in Embodiment 1.

[0045] The loader hydraulic system also includes a gear pump 4, whose inlet is connected to the hydraulic oil tank 1, and whose outlet is connected to the first port 80 of the main valve via the inlet P of the stabilization module 5; an accumulator 2 is connected to the fourth port 83 of the main valve via the X port of the stabilization module 5; the return port T of the stabilization module 5 is connected to the hydraulic oil tank 1; the rodless chamber of the boom cylinder 3 is connected to the second port 81 of the main valve via the working port A of the stabilization module 5, and the rod chamber of the boom cylinder 3 is connected to the third port 82 of the main valve via the working port B of the stabilization module 5. A filling valve 6 is located between the outlet of the gear pump 4 and the inlet P of the stabilization module 5.

[0046] Example 3:

[0047] Based on the loader stabilization module described in Embodiment 1 and the loader hydraulic system described in Embodiment 2, this embodiment provides a loader equipped with either the loader stabilization module described in Embodiment 1 or the loader hydraulic system described in Embodiment 2.

[0048] 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, It includes a main valve core (51), a pressure balancing valve core (52), and a solenoid directional valve (53). The main valve core (51) includes: a first main valve port (80) for connecting to the oil source, a second main valve port (81) for connecting to the rodless chamber of the boom cylinder (3), a third main valve port (82) for connecting to the rod chamber of the boom cylinder (3), a fourth main valve port (83) for connecting to the accumulator (2), and a fifth main valve port (84) for connecting to the return oil port T. The pressure balancing valve core (52) includes: a second oil port (89) of the balancing valve for connecting to the accumulator (2) and a first oil port (88) of the balancing valve for connecting to the return oil port T; the first control end of the pressure balancing valve core (52) is connected to the second oil port (81) of the main valve. The electromagnetic directional valve (53) includes: a first port (85) for connecting the accumulator (2), a second port (86) for connecting the return port T, and a third port (87) for connecting the second control end of the main valve core (51) and the second control end of the pressure balancing valve core (52); the electromagnetic directional valve (53) is used to control the connection state between the accumulator (2) and the return port T by adjusting the position of the pressure balancing valve core (52), thereby balancing the pressure between the rodless chamber of the boom cylinder (3) and the accumulator (2); A first spring (56) is provided at the first control end of the main valve core (51), and the main valve core (51) is also provided with a left working position and a right working position; the switching of the left working position and the right working position of the main valve core (51) is controlled by the electromagnetic reversing valve (53) and the first spring (56); When the electromagnetic reversing valve (53) is not powered, the third oil port (87) of the reversing valve is connected to the return oil port T through the second oil port (86) of the reversing valve. Under the action of the first spring (56), the main valve core (51) is in the right working position. The rodless chamber of the boom cylinder (3) and the accumulator (2) are in the cut-off state, and the rod chamber of the boom cylinder (3) and the return oil port T are in the cut-off state, so that the stabilizing module is in a rigid state. At the same time, the hydraulic oil enters the accumulator (2) through the first oil port (80) and the fourth oil port (83) of the main valve to fill the accumulator (2). When the solenoid directional valve (53) is energized, the third oil port (87) of the directional valve is connected to the accumulator (2) through the first oil port (85) of the directional valve. The hydraulic oil in the accumulator (2) acts on the second control end of the main valve core (51), so that the main valve core (51) is switched to the left position. The rodless chamber of the boom cylinder (3) is connected to the accumulator (2), and the rod chamber of the boom cylinder (3) is connected to the return oil port T, so that the stabilizing module is in a flexible state. The first control end of the pressure balancing valve core (52) is connected to the second oil port (81) of the main valve through the first damper (54), and the second control end of the pressure balancing valve core (52) is connected to the second control end of the main valve core (51) through the second damper (57). When the electromagnetic reversing valve (53) is energized, the reversing sequence of the pressure balancing valve core (52) and the main valve core (51) is changed by utilizing the difference in magnitude of the first damper (54) and the second damper (57). This achieves the following: when the stabilizing module is opened, the pressure between the rodless chamber of the boom cylinder (3) and the accumulator (2) is first balanced, and then the stabilizing module is in a flexible state to avoid the accumulator (2) from being charged and discharged in real time, thereby increasing the lifespan of the accumulator (2).

2. The loader stabilization module according to claim 1, characterized in that, A second spring (55) is provided at the first control end of the pressure balancing valve core (52) to control the opening degree of the pressure balancing valve core (52) according to the pressure and flow rate; When the pressure at the second oil port (81) of the main valve and the oil circuit of the rodless chamber of the boom cylinder (3) is greater than the pressure of the accumulator (2), the second spring (55) acts on the pressure balance valve core (52) to make the first oil port (88) of the balance valve and the second oil port (89) of the balance valve in the cut-off position, so that the pressure of the accumulator (2) cannot be released into the return oil port T. When the pressure at the second oil port (81) of the main valve and the oil circuit of the rodless chamber of the boom cylinder (3) is less than the pressure of the accumulator (2), the second spring (55) acts on the pressure balance valve core (52) to make the first oil port (88) of the balance valve and the second oil port (89) of the balance valve in the connected position, so that the accumulator (2) releases pressure to the return oil port T through the pressure balance valve core (52) until the pressure of the rodless chamber of the boom cylinder (3) is consistent with the pressure of the accumulator (2).

3. The loader stabilization module according to claim 1, characterized in that, It also includes a one-way valve (58) connected in parallel with the second damper (57), the oil inlet of the one-way valve (58) being connected to the second control end of the main valve core (51), and the oil outlet of the one-way valve (58) being connected to the second control end of the pressure balance valve core (52).

4. The loader stabilization module according to claim 1, characterized in that, It also includes a safety valve (59), the oil inlet of which is connected to the accumulator (2), and the oil outlet of which is connected to the return port T.

5. A hydraulic system for a loader, characterized in that, The hydraulic system is equipped with the loader stabilization module as described in any one of claims 1 to 4.

6. The loader hydraulic system according to claim 5, characterized in that, It also includes a gear pump (4), the inlet of which is connected to the hydraulic oil tank (1), and the outlet of which is connected to the first oil port (80) of the main valve through the inlet P of the stabilizing module (5); the accumulator (2) is connected to the fourth oil port (83) of the main valve through the X oil port of the stabilizing module (5); the return oil port T of the stabilizing module (5) is connected to the hydraulic oil tank (1); the rodless chamber of the boom cylinder (3) is connected to the second oil port (81) of the main valve through the working oil port A of the stabilizing module (5), and the rod chamber of the boom cylinder (3) is connected to the third oil port (82) of the main valve through the working oil port B of the stabilizing module (5).

7. The loader hydraulic system according to claim 6, characterized in that, It also includes a filling valve (6) connected between the oil outlet of the gear pump (4) and the oil inlet P of the stabilizing module (5).

8. A loader, characterized in that, The loader is equipped with a loader stabilization module as described in any one of claims 1 to 4.

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