Hydraulic unloading lifting platform

Abstract

The invention belongs to the technical field of unloading platforms, and particularly relates to a hydraulic unloading lifting platform which comprises a bottom plate, one end of the bottom plate is fixedly connected with a fixing seat, the other end of the bottom plate is rotationally connected with a carriage, the top of the fixing seat is rotationally connected with a first hydraulic rod, and an output shaft of the first hydraulic rod is rotationally connected with the carriage. Protective frames are fixedly connected to the positions, close to the outlet, of the inner walls of the two sides of the compartment correspondingly, push plates are rotationally connected into the protective frames through rotating shafts, gears fixedly sleeve the rotating shafts, the gears are in meshed connection with racks, the racks are fixedly connected to output shafts of second hydraulic rods, and the second hydraulic rods are installed on the compartment. According to the automatic unloading device, the carriage is lifted and unloaded through the first hydraulic rod, if a small amount of goods are stacked at the tail of the carriage, the second hydraulic rod is matched to drive the rack and the gear to drive the protective frame and the push plate to rotate, the goods stacked at the tail of the carriage can be quickly and effectively pushed to an outlet, manual intervention is avoided, and the unloading efficiency is remarkably improved; the labor intensity is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of truck unloading platforms, and in particular to a hydraulic truck unloading lifting platform. Background Art

[0002] Hydraulic unloading platform is an auxiliary equipment for vehicles without dump function. In order to achieve fast unloading and transshipment and reduce labor waste, hydraulic unloading platform is widely used.

[0003] Traditional hydraulic unloading platforms rely on hydraulic rods to lift the carriage, tilting it for unloading. This basic structure only allows for simple lifting of the carriage. When a small amount of cargo accumulates at the rear of the carriage, there's a lack of effective unloading assistance. Operators often need to manually clear the pile, increasing labor intensity and reducing unloading efficiency. Therefore, improvements have been developed to address this issue. Summary of the Invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a hydraulic unloading lifting platform.

[0005] The lifting mechanism that this invention relates to a kind of hydraulic unloading lifting platform proposed by the present invention comprises a base plate, one end of the base plate is fixedly connected to a fixed seat, and the other end is rotatably connected to a carriage. The top of the fixed seat is rotatably connected to a hydraulic rod 1, and the output shaft of the hydraulic rod 1 is rotatably connected to the carriage. The inner walls of both sides of the carriage near the exit are respectively fixedly connected to a protective frame, and the protective frame is rotatably connected to a push plate through a rotating shaft. A gear is fixedly sleeved on the rotating shaft, and the gear is meshed with a rack, and the rack is fixedly connected to the output shaft of the hydraulic rod 2, and the hydraulic rod 2 is installed on the carriage; the hydraulic rod 1 is driven to extend by the hydraulic system, and the output shaft of the hydraulic rod 1 will gradually push the carriage upward, and the carriage can slowly tilt to unload. If a small amount of cargo is accumulated at the rear of the carriage, the hydraulic rod 2 can be driven to extend by the hydraulic system, and then the output shaft of the hydraulic rod 2 will drive the rack to move, and then the rack meshes with the gear to drive the protective frame to rotate around the rotating shaft, and the rotating shaft will push the accumulated cargo toward the exit, thereby assisting unloading.

[0006] Preferably, a guide column is provided on the rack, and the end of the guide column is fixedly connected to a fixed block, which is installed on the carriage; through the sliding fit between the guide column and the rack, the rack can be limited in movement, making its movement process more stable.

[0007] Preferably, a hydraulic unloading lifting platform also includes: a stacking height acquisition module, installed in a shell outside the push plate, for monitoring the stacking height and outline of the cargo at the rear of the car in real time, and generating a stacking height coefficient through the control module; a pressure acquisition module, installed in the oil circuit of hydraulic rod two, for monitoring the hydraulic pressure fluctuations during the pushing process in real time, and generating a pressure fluctuation coefficient through the control module; the control module conducts a comprehensive analysis of the generated stacking height coefficient and pressure fluctuation coefficient to generate an evaluation coefficient to determine whether the pushing force needs to be increased, compares the evaluation coefficient with a pre-set reference threshold, and controls the working state of hydraulic rod two according to the comparison result.

[0008] Preferably, the push plate is provided with a through opening connected to the shell, and a sealing plate is provided in the through opening, which is elastically connected to the push plate and can block the bottom of the shell, and the inner wall of the push plate is fixedly connected with a baffle that can contact the end of the sealing plate; when the push plate pushes the material, the sealing plate will move away from the stacking height collection module under the action of elastic force, and the bottom of the shell will be exposed, and the stacking height collection module can work normally. When the push plate is reset to its initial position, the sealing plate will move towards the stacking height collection module due to the obstruction of the baffle, and seal the bottom of the shell, thereby protecting the stacking height collection module and preventing goods from entering the shell.

[0009] Preferably, the end of the sealing plate is provided with a guide column fixedly connected to the inner side of the push plate, and a spring is sleeved on the guide column, and the two ends of the spring are respectively fixedly connected to the push plate and the sealing plate; the elastic force of the spring can make the sealing plate move away from the stacking height collection module, exposing the bottom of the shell.

[0010] Preferably, the output and input ends of the stacking height acquisition module and the output and input ends of the pressure acquisition module are electrically connected to the input and output ends of the control module respectively, and the output end of the control module is electrically connected to the input end of the second hydraulic rod.

[0011] Preferably, the control module controls the working state of the second hydraulic rod according to the comparison result in the following steps:

[0012] The stacking height acquisition module collects the stacking height and outline of the cargo at the rear of the carriage, and the pressure acquisition module collects the hydraulic pressure fluctuations during the pushing process; the control module calculates the stacking height coefficient, pressure fluctuation coefficient and evaluation coefficient; if the evaluation coefficient is less than the reference threshold: maintain the current parameters; if the evaluation coefficient is greater than or equal to the reference threshold: start a graded response to the hydraulic rod 2.

[0013] Preferably, the generation logic of the stacking height coefficient is:

[0014] Based on the actual stacking height data continuously collected during the pushing process, the degree of dispersion of the actual stacking height relative to the average stacking height is calculated, and a stacking height coefficient that reflects the uniformity of the tail cargo sliding is generated.

[0015] Preferably, the logic for generating the pressure fluctuation coefficient is:

[0016] Based on the actual hydraulic pressure data continuously collected during the pushing process, the fluctuation amplitude of the actual pressure relative to the average pressure is calculated to generate a pressure fluctuation coefficient that reflects the adhesion strength of the cargo.

[0017] Preferably, the generation logic of the evaluation coefficient is:

[0018] By coupling the stacking height coefficient and the pressure fluctuation coefficient and combining them with the preset weight coefficient for dynamic weighted calculation, an assessment coefficient for the comprehensive risk of quantitative material pushing is generated.

[0019] Compared with the prior art, the present invention provides a hydraulic unloading lifting platform with the following beneficial effects:

[0020] 1. A hydraulic unloading lifting platform, which lifts and unloads the car body through hydraulic rod 1, and cooperates with hydraulic rod 2 to drive the rack and gear transmission, driving the protective frame and push plate to rotate, which can quickly and effectively push the accumulated goods at the rear of the car body to the exit, avoiding manual intervention, significantly improving unloading efficiency and reducing labor intensity.

[0021] 2. A hydraulic unloading lifting platform. The sealing plate set on the push plate cooperates with the spring, guide column and baffle. It automatically opens when the push plate pushes the material, allowing the stacking height collection module to work normally; it automatically closes when the push plate resets to prevent the goods from entering the shell, effectively protecting the monitoring equipment and reducing equipment maintenance costs and failure probability.

[0022] 3. A hydraulic unloading lift platform. The stacking height acquisition module monitors the height and contour of cargo stacked at the rear of the vehicle in real time. The pressure acquisition module monitors hydraulic pressure fluctuations during the pusher operation. The control module generates an evaluation coefficient based on a comprehensive analysis of the stacking height coefficient and the pressure fluctuation coefficient, enabling intelligent judgment and regulation of the pusher force. Based on the comparison of the evaluation coefficient with a reference threshold, the operating state of the hydraulic lever is automatically adjusted. This not only saves energy when cargo is well stacked, but also ensures thorough unloading under complex conditions, significantly improving the automation and adaptability of the unloading platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a hydraulic unloading lifting platform proposed by the present invention;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of a carriage of a hydraulic unloading lifting platform proposed by the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of a protective frame of a hydraulic unloading lifting platform proposed by the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the shell of a hydraulic unloading lifting platform proposed by the present invention;

[0027] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at point A;

[0028] Figure 6 This is a schematic diagram of the sealing plate installation structure of a hydraulic unloading lifting platform proposed by the present invention;

[0029] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure at point B;

[0030] Figure 8 This is a system block diagram of a hydraulic unloading lifting platform proposed by the present invention.

[0031] In the figure: 1. Base plate; 2. Fixed seat; 3. Hydraulic rod 1; 4. Carriage; 5. Protective frame; 6. Push plate; 7. Rotating shaft; 8. Hydraulic rod 2; 9. Rack; 10. Gear; 11. Fixed block; 12. Guide column; 13. Stacking height acquisition module; 14. Pressure acquisition module; 15. Control module; 16. Housing; 17. Through port; 18. Closing plate; 19. Guide column; 20. Spring; 21. Baffle. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] Reference Figures 1-8A hydraulic unloading lifting platform includes a base plate 1, one end of the base plate 1 is fixedly connected to a fixing seat 2, and the other end is rotatably connected to a carriage 4. The top of the fixing seat 2 is rotatably connected to a hydraulic rod 3, and the output shaft of the hydraulic rod 3 is rotatably connected to the carriage 4. The inner walls of both sides of the carriage 4 near the exit are respectively fixedly connected to protective frames 5, and the protective frames 5 are rotatably connected to a push plate 6 through a rotating shaft 7. A gear 10 is fixedly sleeved on the rotating shaft 7, and the gear 10 is meshed with a rack 9. The rack 9 is fixedly connected to the output shaft of a hydraulic rod 8, and the hydraulic rod 8 is installed on the carriage 4;

[0035] During use, the hydraulic system drives the hydraulic rod 13 to extend, and the output shaft of the hydraulic rod 13 will gradually push the carriage 4 upward, and the carriage 4 can slowly tilt to unload. If a small amount of cargo is piled up at the tail of the carriage 4, the hydraulic system can drive the hydraulic rod 28 to extend, and then the output shaft of the hydraulic rod 28 will drive the rack 9 to move, and then the rack 9 engages the gear 10 to drive the protective frame 5 to rotate around the rotating shaft 7, and the rotating shaft 7 will push the accumulated cargo toward the exit, thereby assisting unloading.

[0036] Among them, the rack 9 is penetrated by a guide column 12, the end of the guide column 12 is fixedly connected to a fixing block 11, and the fixing block 11 is installed on the carriage 4;

[0037] During use, the sliding fit between the guide post 12 and the rack 9 can limit the movement of the rack 9, making its movement process more stable.

[0038] In another embodiment, a hydraulic unloading lifting platform further includes:

[0039] The stacking height acquisition module 13 is installed in the housing 16 outside the push plate 6 and is used to monitor the stacking height and contour of the cargo at the rear of the carriage 4 in real time and generate a stacking height coefficient through the control module 15;

[0040] The pressure acquisition module 14 is installed in the oil circuit of the hydraulic rod 2 8 and is used to monitor the hydraulic pressure fluctuations during the pushing process in real time and generate the pressure fluctuation coefficient through the control module 15;

[0041] Among them, the output end and input end of the stacking height acquisition module 13 and the output end and input end of the pressure acquisition module 14 are electrically connected to the input end and output end of the control module 15 respectively, and the output end of the control module 15 is electrically connected to the input end of the hydraulic rod 2 8.

[0042] It should be noted that the stacking height acquisition module 13 can be a millimeter wave radar sensor or other equipment that can monitor the height and contour of the cargo stacking at the rear of the carriage 4 in real time, the pressure acquisition module 14 can be a hydraulic pressure sensor or other equipment that can monitor the hydraulic pressure fluctuations during the pushing process in real time, and the control module 15 is an embedded controller (such as the STM32 series) with an integrated data fusion algorithm. Therefore, the stacking height acquisition module 13, the pressure acquisition module 14 and the control module 15 are not specifically limited here and can be selected according to actual needs;

[0043] During use, the control module 15 performs a comprehensive analysis on the generated stacking height coefficient and pressure fluctuation coefficient to generate an evaluation coefficient, and determines whether to increase the pushing force. The evaluation coefficient is compared with a preset reference threshold, and the working state of the hydraulic rod 2 8 is controlled according to the comparison result.

[0044] Furthermore, the push plate 6 is provided with a through opening 17 communicating with the housing 16. A sealing plate 18 is provided in the through opening 17 and is elastically connected to the push plate 6 and capable of blocking the bottom of the housing 16. A baffle 21 is fixedly connected to the inner wall of the push plate 6 and is capable of contacting the end of the sealing plate 18.

[0045] During use, when the push plate 6 pushes the material, the sealing plate 18 will move away from the stacking height collection module 13 under the action of elastic force, the bottom of the shell 16 will be exposed, and the stacking height collection module 13 can work normally. When the push plate 6 is reset to the initial position, the sealing plate 18 will move towards the stacking height collection module 13 due to the obstruction of the baffle 21, sealing the bottom of the shell 16, thereby protecting the stacking height collection module 13 and preventing goods from entering the shell 16.

[0046] Among them, the end of the sealing plate 18 is penetrated by a guide post 19 fixedly connected to the inner side of the push plate 6, and a spring 20 is sleeved on the guide post 19. The two ends of the spring 20 are fixedly connected to the push plate 6 and the sealing plate 18 respectively;

[0047] When in use, the elastic force of the spring 20 can move the sealing plate 18 away from the stacking height collecting module 13 , exposing the bottom of the housing 16 .

[0048] In another embodiment, the control module 15 performs a comprehensive analysis on the generated stacking height coefficient and pressure fluctuation coefficient to generate an evaluation coefficient, determines whether to increase the pushing force, compares the evaluation coefficient with a preset reference threshold, and controls the working state of the hydraulic rod 2 8 according to the comparison result in the following steps:

[0049] Real-time detection: The stacking height acquisition module 13 collects the height and outline of the cargo stacking at the rear of the carriage 4; the pressure acquisition module 14 collects the hydraulic pressure fluctuations during the pushing process;

[0050] Coefficient calculation:

[0051] Stacking height coefficient: This characterizes the temporal and spatial heterogeneity of cargo retention, reflecting the degree of dispersion of cargo accumulation at the rear of carriage 4 and the risk of cargo sliding. A low Hδ value indicates uniform cargo sliding (no retention), while a high Hδ value indicates severe cargo accumulation at the rear (needing material pushing intervention).

[0052] The generation logic of the stacking height coefficient is:

[0053] S1, the stacking height acquisition module 13 obtains the actual stacking height of the goods at the rear of the carriage 4 at different times within T during the pushing process, and calibrates the actual stacking height obtained at the mth time within T as m is a positive integer;

[0054] S2. Calculate the stacking height coefficient. The calculation expression is:

[0055]

[0056] Where, is the average accumulation height within time T; s is the number of sampling times within time T.

[0057] Pressure Fluctuation Coefficient: Quantifies the mechanical pushing resistance, revealing the adhesion strength between the cargo and the carriage 4 and the load anomaly of the pushing structure. A low Pσ value indicates smooth pushing (no sticking), while a high Pσ value indicates that the cargo is sticking or stuck (increasing the pushing force is required).

[0058] Among them, the generation logic of the pressure fluctuation coefficient is:

[0059] S1. The actual hydraulic pressure at different times within T time during the pushing process is obtained through the pressure acquisition module 14, and the actual hydraulic pressure obtained at the nth time within T time is calibrated as n is a positive integer;

[0060] S2. Calculate the pressure fluctuation coefficient. The calculation expression is:

[0061]

[0062] Where, is the average pressure within time T; k is the number of sampling times within time T.

[0063] Evaluation coefficient: Integrating the comprehensive rating of pushing difficulty and risk, establishing a dynamic balance between detention severity and mechanical resistance, and coupling the stacking height coefficient and the pressure fluctuation coefficient, combined with the preset weight coefficient for dynamic weighted calculation, to generate an evaluation coefficient for the quantitative comprehensive risk of pushing; wherein, the pressure fluctuation coefficient has a higher influence on the evaluation coefficient than the stacking height coefficient. Formula analysis is performed through the control module 15, according to the formula:

[0064]

[0065] Where α and β are weight coefficients (determined dynamically based on experimental data and process requirements), and α and β>1.

[0066] Dynamic adjustment: If R pg <R 阈 :Maintain the current parameters; if R pg ≥R 阈 : Start the hierarchical response, the control module 15 activates the following actions in sequence (each level is 0.5 seconds apart):

[0067] Level 1: Extend the pushing time: Increase the hydraulic rod 28 stroke holding time by 20%; Level 2: Increase the thrust: Increase the hydraulic system pressure by 15%; Level 3: Expand the pushing range: Increase the push plate 6 rotation angle by 10°, R 阈 is the reference threshold.

[0068] Working principle:

[0069] Basic unloading principle: Start the hydraulic system to drive the hydraulic rod 3 to extend, and its output shaft pushes the carriage 4 upward. The carriage 4 gradually tilts, and the goods begin to slide down and unload by gravity.

[0070] Assisted unloading principle: When a small amount of cargo accumulates at the rear of carriage 4, the hydraulic system extends hydraulic rod 2 (8). The output shaft of hydraulic rod 2 (8) moves rack 9, which is fixed to it. Rack 9 meshes with gear 10, thereby rotating gear 10 fixed to shaft 7. This in turn causes push plate 6, which is connected to the protective frame 5 via shaft 7, to rotate around shaft 7. Push plate 6 pushes the cargo accumulated at the rear of carriage 4 toward the exit, completing the auxiliary unloading operation.

[0071] Intelligent control principle:

[0072] The stacking height acquisition module 13 monitors the stacking height and contour of the cargo at the rear of the carriage 4 in real time; the pressure acquisition module 14 collects the hydraulic pressure fluctuation data during the pushing process in real time and transmits the collected data to the control module 15; the control module 15 performs dynamic weighted calculation on the stacking height coefficient and the pressure fluctuation coefficient to generate an evaluation coefficient to quantify the comprehensive risk of pushing; the control module 15 compares the evaluation coefficient with the pre-set reference threshold. pg<R 阈 , maintain the current working parameters of hydraulic rod 28; if R pg ≥R 阈 , the control module 15 starts a graded response: the first level increases the stroke holding time of the hydraulic rod 2 8 by 20%; the second level increases the pressure of the hydraulic system by 15%; the third level increases the rotation angle of the push plate 6 by 10°, and the interval between each level of action is 0.5 seconds.

[0073] Equipment protection principle: When the push plate 6 pushes the material, the elastic force of the spring 20 causes the sealing plate 18 to move away from the stacking height collection module 13, exposing the bottom of the shell 16, so that the stacking height collection module 13 can work normally; when the push plate 6 returns to the initial position, the sealing plate 18 is blocked by the baffle 21 and moves towards the stacking height collection module 13, sealing the bottom of the shell 16, preventing goods from entering, and protecting the stacking height collection module 13.

[0074] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A hydraulic unloading lifting platform, comprising a base plate (1), characterized in that: One end of the bottom plate (1) is fixedly connected to a fixing seat (2), and the other end is rotatably connected to a carriage (4). The top of the fixing seat (2) is rotatably connected to a hydraulic rod (3). The output shaft of the hydraulic rod (3) is rotatably connected to the carriage (4). Protective frames (5) are fixedly connected to positions near the exit of the inner walls of both sides of the carriage (4). A push plate (6) is rotatably connected to the protective frame (5) via a rotating shaft (7). A gear (10) is fixedly sleeved on the rotating shaft (7). The gear (10) is meshed with a rack (9). The rack (9) is fixedly connected to the output shaft of the hydraulic rod (8). The hydraulic rod (8) is mounted on the carriage (4).

2. The hydraulic unloading lifting platform according to claim 1, characterized in that: A guide column (12) is provided on the rack (9), and the end of the guide column (12) is fixedly connected to a fixed block (11), and the fixed block (11) is installed on the carriage (4).

3. The hydraulic unloading lifting platform according to claim 1, characterized in that: Also includes: A stacking height acquisition module (13) is installed in a housing (16) outside the push plate (6) and is used to monitor the stacking height and profile of the cargo at the rear of the carriage (4) in real time and generate a stacking height coefficient through a control module (15); A pressure acquisition module (14) is installed on the oil circuit of the hydraulic rod 2 (8) to monitor the hydraulic pressure fluctuation in real time during the pushing process and generate a pressure fluctuation coefficient through a control module (15); The generated stacking height coefficient and pressure fluctuation coefficient are comprehensively analyzed by the control module (15) to generate an evaluation coefficient, which is compared with a preset reference threshold value, and the working state of the hydraulic rod 2 (8) is controlled according to the comparison result.

4. The hydraulic unloading lifting platform according to claim 3, characterized in that: The push plate (6) is provided with a through opening (17) communicating with the housing (16); a sealing plate (18) is provided in the through opening (17) and is elastically connected to the push plate (6) and capable of blocking the bottom of the housing (16); and a baffle (21) is fixedly connected to the inner wall of the push plate (6) and is capable of contacting the end of the sealing plate (18).

5. The hydraulic unloading lifting platform according to claim 4, characterized in that: A guide post (19) fixedly connected to the inner side of the push plate (6) is passed through the end of the sealing plate (18); a spring (20) is sleeved on the guide post (19); and two ends of the spring (20) are fixedly connected to the push plate (6) and the sealing plate (18), respectively.

6. The hydraulic unloading lifting platform according to claim 3, characterized in that: The output end and input end of the stacking height acquisition module (13) and the output end and input end of the pressure acquisition module (14) are electrically connected to the input end and output end of the control module (15) respectively, and the output end of the control module (15) is electrically connected to the input end of the second hydraulic rod (8).

7. The hydraulic unloading lifting platform according to claim 3, characterized in that: The control module (15) controls the working state of the hydraulic rod 2 (8) according to the comparison result in the following steps: The stacking height acquisition module (13) acquires the stacking height and contour of the cargo at the rear of the carriage (4), and the pressure acquisition module (14) acquires the hydraulic pressure fluctuation during the pushing process; the control module (15) calculates the stacking height coefficient, the pressure fluctuation coefficient and the evaluation coefficient; if the evaluation coefficient is less than the reference threshold: maintain the current parameter; if the evaluation coefficient is greater than or equal to the reference threshold: start a graded response to the hydraulic rod 2 (8).

8. The hydraulic unloading lifting platform according to claim 3, characterized in that: The generation logic of the stacking height coefficient is: Based on the actual stacking height data continuously collected during the pushing process, the degree of dispersion of the actual stacking height relative to the average stacking height is calculated, and a stacking height coefficient that reflects the uniformity of the tail cargo sliding is generated.

9. The hydraulic unloading lifting platform according to claim 3, characterized in that: The generation logic of the pressure fluctuation coefficient is: Based on the actual hydraulic pressure data continuously collected during the pushing process, the fluctuation amplitude of the actual pressure relative to the average pressure is calculated to generate a pressure fluctuation coefficient that reflects the adhesion strength of the cargo.

10. The hydraulic unloading lifting platform according to claim 3, characterized in that: The generation logic of the evaluation coefficient is: By coupling the stacking height coefficient and the pressure fluctuation coefficient and combining them with the preset weight coefficient for dynamic weighted calculation, an assessment coefficient for the comprehensive risk of quantitative material pushing is generated.

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