Intelligent vertical lifting tail plate device and control method thereof

Abstract

The invention provides an intelligent vertical lifting tail plate device and a control method thereof.The intelligent vertical lifting tail plate device comprises a movable support, a mounting frame and a guide rail fixedly connected with the mounting frame, a sliding block is arranged in the guide rail, a lifting oil cylinder used for driving the sliding block to slide is further arranged on the mounting frame, and a panel assembly is hinged to one side of the sliding block; an overturning oil cylinder used for driving the panel assembly to overturn is arranged between the sliding block and the panel assembly, the overturning oil cylinder is used for driving the panel assembly to rotate by 0-120 degrees from the side, close to the rear end of the compartment, of the panel assembly to the side, facing the ground, of the panel assembly, and an anti-falling device is arranged between the sliding block and the lifting oil cylinder. An angle sensor, a safety sensing module and a controller are further arranged on the intelligent vertical lifting tail plate device. According to the intelligent vertical lifting tail plate device, large-angle rotation of the panel assembly can be achieved by arranging the overturning oil cylinder, so that the panel can be overturned and inclined to slide out and unload light goods, and the unloading efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of logistics transportation, in particular to an intelligent vertical lifting tailgate device and a control method thereof. BACKGROUND

[0002] In recent years, with the rapid development of the logistics industry, the number of trucks continues to rise, and the truck tailgate, as a new type of truck-mounted hydraulic lifting loading and unloading equipment, can greatly improve the loading and unloading efficiency, save human resources, improve the safety of operators, and reduce the damage rate of goods during loading and unloading, and is favored by people. However, the existing tailgate has the problems of single function and use safety. The turning angle of the turning hydraulic cylinder of the traditional tailgate is limited to 0-90°, and the tailgate needs to be completely vertically lowered each time to load and unload goods, which greatly reduces the loading and unloading efficiency.

[0003] The present application improves the structure of the traditional tailgate, and the turning angle of the turning hydraulic cylinder in the present application is 0-120°. The traditional tailgate loads and unloads goods only by vertically lifting the tailgate. The present application has different loading and unloading modes for different goods. If it is heavy goods, the tailgate is vertically lifted for loading and unloading. If it is light goods, the tailgate is expanded into an inclined plane, and the goods can slide down along the inclined plane, greatly improving the loading and unloading efficiency. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide an intelligent vertical lifting tailgate device, which aims to solve the technical problem of low loading and unloading efficiency in the prior art that the loading and unloading of goods by vehicles is carried out by completely vertically lifting the tailgate.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme: an intelligent vertical lifting tailgate device for unloading the truck compartment, comprising a moving support and a mounting frame vertically arranged on the moving support, the intelligent vertical lifting tailgate device further comprising:

[0006] a guide rail, which is fixedly connected with the mounting frame;

[0007] a sliding block, which is arranged in the guide rail and can slide up and down along the guide rail;

[0008] a lifting oil cylinder for pulling the sliding block to slide up and down in the guide rail;

[0009] a panel assembly, which comprises a tailgate hingedly connected to one end of the sliding block, and an expansion plate slidably connected to one side of the tailgate;

[0010] A turnover oil cylinder is rotatably connected to one end of the sliding block and rotatably connected to one side of the tail plate, and is used to drive the panel assembly to rotate between 0-120 degrees from the side of the rear end of the carriage close to the panel assembly to the side facing the ground.

[0011] A safety induction module and a controller;

[0012] The safety induction module comprises a first laser sensor arranged close to the tail plate of the sliding block, and the first laser sensor is used to measure the distance between the panel assembly and the floor of the carriage.

[0013] The lifting oil cylinder, the turnover oil cylinder and the safety induction module are electrically connected to the controller.

[0014] Compared with the prior art, the beneficial effects of the present application are that the panel assembly is hinged on the sliding block sliding along the guide rail, and the turnover oil cylinder connected between the panel assembly and the sliding block controls the rotation of the panel assembly around one side of the sliding block between 0-120 degrees, so that the tail plate assembly can be lifted and rotated at a large angle at the same time. For some lighter goods, the angle of the panel assembly can be controlled to be greater than 90 degrees, forming an inclined surface with the ground, and the goods can be directly slid out of the cargo box for unloading, without the need to unload the goods by lifting the panel assembly, thereby improving the unloading efficiency.

[0015] According to one aspect of the above technical solution, the intelligent vertical lifting tail plate device further comprises an anti-falling device arranged between the lifting oil cylinder and the sliding block, and used to lock the relative sliding between the sliding block and the guide rail.

[0016] The anti-falling device comprises a connecting buckle, one end of the connecting buckle is provided with a spring, both sides of the spring are provided with two first connecting rods, one end of the two first connecting rods is rotatably connected to the connecting buckle, the other end of the first connecting rod is rotatably connected with a brake block, a brake base is arranged between the two brake blocks, one end of the brake base is fixedly connected with the sliding block, the other end is connected with the spring, two second connecting rods are arranged on both sides of the spring, one end of the two second connecting rods is fixedly connected with the brake base, and the other end close to the middle part of the first connecting rod is rotatably connected with the first connecting rod.

[0017] According to one aspect of the above technical solution, a chain is arranged between the lifting oil cylinder and the anti-falling device, a sprocket adapted to the chain is arranged on the guide rail, one end of the chain is connected to the telescopic end of the lifting oil cylinder, and the other end passes through the sprocket and is connected to the connecting buckle.

[0018] According to an aspect of the above technical solution, the expansion plate is provided with a buckle for locking the sliding of the expansion plate, and a cavity is arranged at the lower end of the buckle on the tail plate, and an anti-overweight module is detachably arranged in the cavity.

[0019] The anti-overweight module comprises a fixed plate, a plurality of pressure sensors arranged on one side of the fixed plate, a baffle rotatably connected to one side of the fixed plate, and an angle sensor arranged on the tail plate for measuring the included angle between the tail plate and the horizontal plane.

[0020] According to an aspect of the above technical solution, the upper side of the tail plate is provided with a safety guardrail at both ends, the mounting guardrail comprises a lower cross beam fixedly connected with the tail plate, an upper cross beam arranged at the upper end of the lower cross beam, and a plurality of adjusting rods arranged between the upper cross beam and the lower cross beam and parallel to each other, the two ends of the adjusting rod are hingedly connected with the upper cross beam and the lower cross beam respectively, the adjusting rod comprises a first supporting rod connected with one end of the upper cross beam and a second supporting rod connected with one end of the lower cross beam, the first supporting rod is sleeved with the second supporting rod, and a self-locking mechanism is arranged between any adjusting rod and the upper cross beam.

[0021] According to an aspect of the above technical solution, the safety sensing module further comprises a second laser sensor arranged on one side of the bottom of the tail plate, and an infrared sensor arranged on one side of the guide rail.

[0022] According to an aspect of the above technical solution, the brake base is in an inverted isosceles trapezoidal shape, and the brake block is arranged in parallel with one side of the brake base.

[0023] The application also provides a control method of the intelligent vertical lifting tail plate device, the method comprising the following steps:

[0024] S11, moving the sliding block and the panel assembly relative to the guide rail by the lifting oil cylinder, and then determining whether the panel assembly is flush with the carriage floor according to the height value between the panel assembly and the carriage floor measured by the first laser sensor on the upper side of the panel assembly;

[0025] S12, the controller controls the operation of the turnover oil cylinder to swing the angle of the panel assembly to a preset angle;

[0026] S13, pulling out the expansion plate to make one end of the expansion plate abut against the ground.

[0027] According to an aspect of the above technical solution, the control method further comprises:

[0028] S21, before unloading, measuring the included angle a between the panel assembly and the horizontal plane by the angle sensor, determining whether the included angle a meets the safety angle requirement, and if not, controlling the buzzer and warning light to work.

[0029] S22, if the safety angle requirement is met, the controller calculates the final weight borne by the panel assembly according to the weight value measured by the anti-overweight module, and compares the final weight with the preset weight to determine whether the final weight is greater than the preset weight;

[0030] The calculation expression of the final weight is: F is the pressure value measured by the pressure sensor;

[0031] S23, if the final weight is greater than the preset weight, the controller controls the buzzer and warning light to work.

[0032] According to one aspect of the above technical solution, the control method further comprises:

[0033] S31, the controller determines whether the turnover oil cylinder is in the first working state of contraction, or whether the lifting oil cylinder and the turnover oil cylinder are both in the second working state of elongation;

[0034] S32, if it is the first working state, the controller controls the infrared sensor to work, determines whether there is personnel approach according to the signal of the infrared sensor, and if there is personnel approach, the controller controls to stop the first working state and controls the buzzer and warning light to work;

[0035] S33, if it is the second working state, the controller intermittently receives the distance signal y1 between the first laser sensor and the carriage floor and the distance signal y2 between the second laser sensor and the ground, outputs the first voltage signal and the second voltage signal through the signal conditioning circuit according to y1 and y2 respectively, and determines whether the difference between the first voltage signal and the second voltage signal exceeds the preset value;

[0036] S34, if the difference exceeds the preset value, the controller controls the lifting oil cylinder or the turnover oil cylinder to stop working, and controls the buzzer and warning light to work. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a side view of an intelligent vertical lifting tail plate device in an embodiment of the present application;

[0038] Figure 2 It is a structural schematic view of an anti-falling device in an embodiment of the present application;

[0039] Figure 3 It is a structural schematic view of a panel assembly in an embodiment of the present application;

[0040] Figure 4 It is a structural schematic view of a buckle in an embodiment of the present application;

[0041] Figure 5 It is a structural schematic view of an anti-overweight module in an embodiment of the present application;

[0042] Figure 6 Structure diagram of the safety fence in an embodiment of the present application;

[0043] Figure 7 Structure diagram of the safety fence in an embodiment of the present application;

[0044] Main component symbol explanation: 1-rail, 11-sprocket, 12-chain, 2-sliding block, 3-lifting oil cylinder, 4-panel assembly, 41-tail plate, 42-expansion plate, 43-cavity, 44-anti-overload module, 441-fixing plate, 442-pressure sensor, 443-baffle, 45-buckle, 451-compression spring, 452-pull handle, 453-lock, 454-latch, 5-turnover oil cylinder, 6-falling protection device, 61-connection buckle, 62-spring, 63-first connecting rod, 64-second connecting rod, 65-brake block, 66-brake base, 7-angle sensor, 8-safety induction module, 81-first laser sensor, 82-second laser sensor, 83-infrared sensor, 9-safety fence, 91-lower crossbeam, 92-upper crossbeam, 93-adjusting rod, 931-first supporting rod, 932-second supporting rod, 933-positioning hole, 94-self-locking mechanism, 941-locking seat, 942-locking device, 943-locking button;

[0045] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0046] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. Several embodiments of the present application are given in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided for the purpose of making the disclosure of the present application more thorough and comprehensive.

[0047] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0049] Referring to Figure 1 The intelligent vertical lifting tail plate device is used for unloading the carriage of a truck, comprising a moving support, and a mounting frame vertically arranged on the moving support. In use, the device is moved to one side of the carriage, and the mounting frame is detachably connected and fixed with one side of the carriage. Guide rails 1 are fixedly connected to both sides of the mounting frame. Slides 2 are arranged in the guide rails 1 and can slide in the guide rails 1. Lifting oil cylinders 3 are arranged on the mounting frame and drive the slides 2 to slide in the guide rails 1 through the extension and retraction movement. Panel assemblies 4 are arranged on the slides 2 and close to the bottom end outer sides of the slides 2. The panel assemblies 4 are hingedly connected with the two slides 2. Turnover oil cylinders 5 are arranged between the panel assemblies 4 and the slides 2. One end of the turnover oil cylinders 5 is hingedly connected with the upper end of the panel assembly 4 and the slide 2, and the other end is hingedly connected with the upper side of the panel assembly 4 close to the two side edges. Of course, the other end can be hingedly connected with the side of the panel assembly 4. The panel assemblies 4 are driven to rotate around one side of the slide 2 through the extension and retraction of the turnover oil cylinders 5, so as to realize the turnover of the panel assemblies 4. It is worth mentioning that the hinging point of the panel assembly 4 protrudes from the side of the slide 2 away from the carriage, and the hinging point of the turnover oil cylinder 5 and the slide 2 is arranged on the side of the slide 2 close to the carriage, that is, the hinging point of the turnover oil cylinder 5 and the slide 2 and the hinging point of the panel assembly 4 and the slide 2 are not on the same vertical line. In this way, the turnover oil cylinder 5 can control the panel to rotate at any angle between 0-120°, so as to realize the sliding and unloading of light and heavy goods.

[0050] Referring to Figure 1 and Figure 2In some embodiments, a fall-preventing device 6 is arranged between the lifting oil cylinder 3 and the sliding block 2, specifically, the fall-preventing device 6 comprises a connecting buckle 61 connected with the lifting oil cylinder 3 at one end, a spring 62 arranged at the other end of the connecting buckle 61, two first connecting rods 63 arranged at both sides of the spring 62, one end of the two first connecting rods 63 rotatably connected with the connecting buckle 61, a brake block 65 rotatably connected with the other end of each of the first connecting rods 63, a brake base 66 arranged between the two brake blocks 65, one end of the brake base 66 fixedly connected with the sliding block 2, the other end of the brake base 66 connected with the spring 62, two second connecting rods 64 arranged at both sides of the spring 62, one end of the two second connecting rods 64 fixedly connected with the brake base 66, the other end of the two second connecting rods 64 rotatably connected with the first connecting rods 63 near the middle portions of the first connecting rods 63; in a normal state, the spring 62 is in a stretched state under the action of the gravity of the sliding block 2 and the panel assembly 4, the two first connecting rods 63 are contracted towards the middle under the lever force of the second connecting rods 64, so that the distance between the two brake blocks 65 is smaller than the distance inside the guide rail 1, the fall-preventing device 6 and the sliding block 2 can slide up and down inside the guide rail 1 under the traction of the lifting oil cylinder 3, when the connecting buckle 61 is suddenly disconnected with the lifting oil cylinder 3, the spring 62 rapidly contracts after losing the pulling force of the lifting oil cylinder 3, so as to increase the included angle between the two first connecting rods 63, and further increase the distance between the two brake blocks 65, so that the brake blocks 65 are pressed against the inner wall of the guide rail 1 to generate a friction force, preventing the sliding block 2 from continuously sliding downwards, thereby achieving the fall-preventing function.

[0051] Referring to Figure 3 , the brake base 66 is in an inverted isosceles trapezoidal structure, and the brake blocks 65 arranged at both sides of the brake base 66 are arranged in parallel with the isosceles side of the brake base 66 near one side of the brake base 66, and it can be understood that the side of the brake block 65 near the brake base 66 is inclined outward; through such design, the brake base 66 and the brake blocks 65 at both sides form a wedge interlocking structure, which can prevent the spring 62 and the two second connecting rods 64 from being broken and form a wedge interlocking structure, preventing the further falling of the sliding block 2.

[0052] In some embodiments, a chain 12 is further arranged between the lifting oil cylinder 3 and the fall-preventing device 6, a sprocket 11 adapted to the chain 12 is arranged at the upper end of the guide rail 1, and the chain 12 is connected with the lifting oil cylinder 3 and the fall-preventing device 6 at both ends thereof after passing through the sprocket 11, and it can be understood that the hard connection between the lifting oil cylinder 3 and the fall-preventing device 6 is replaced by the soft connection through the arrangement of the chain 12 and the sprocket 11, and the extension direction of the lifting oil cylinder 3 is changed, which is suitable for some vehicle bodies with small space at the upper end of the carriage, and makes the installation position of the lifting oil cylinder 3 more flexible, for example, as shown in FIG. 1, the lifting oil cylinder 3 can be arranged on the side close to the lower end of the guide rail 1 away from the panel assembly 4.

[0053] Furthermore, in this embodiment, the panel assembly 4 includes a tail plate 41 and an extension plate 42 disposed on one side of the upper surface of the tail plate 41. The front end of the tail plate 41 is hinged to the slider 2. A slide rail is provided on the tail plate, and the extension plate 42 can slide back and forth along the slide rail of the tail plate 41. Buckles 45 are provided on both the left and right sides of the extension plate 42, and the buckles 45 are used to lock the relative sliding of the extension plate 42 and the tail plate 41. Figure 4 As shown, the buckle 45 includes a latch 453 and a compression spring 451 disposed within the latch 453. One end of the compression spring 451 is connected to the latch 453, and the other end is connected to the extension plate 42. A pull handle 452 protrudes from the outside of the latch 453, and a pin 454 is provided on the inside of the pull handle 452. A socket for the pin 454 is provided on the tail plate. In use, the pull handle 452 is pulled outward, and then rotated 90° to insert the pin 454 into the socket, locking the extension plate 42 and the tail plate 41 to prevent the extension plate 42 from sliding along the tail plate 41. To unlock, Under pressure, the compression spring 451 is compressed, and the pull handle 452 is pressed into the slide, thereby unlocking the tail plate 41 and the extension plate 42. The extension plate 42 can slide up and down along the slide of the tail plate 41. A cavity 43 with one open end is provided on one side of the tail plate 41 at the lower end of the buckle. An anti-overweight module 44 is provided inside the cavity 43 to measure the weight of goods on the panel assembly 4. More specifically, the anti-overweight module 44 includes a fixing plate 441, on which multiple pressure sensors 442 are provided. In this embodiment, five pressure sensors 442 are provided, such as... Figure 5 As can be seen, the five pressure sensors 442 are arranged in a rectangular shape. Using multiple sensors improves the detection range and accuracy of cargo weight. A baffle 443 is provided on one side of the fixed plate 441, and the baffle 443 is rotatably connected to the fixed plate 441. During installation, the fixed plate 441 is pushed into the cavity 43 from the opening end, with the side containing the pressure sensors 442 facing upwards. When the fixed plate 441 is fully inserted into the bottom of the cavity 43, the baffle 443 is located outside the cavity 43 and flush with the bottom side of the cavity 43. Then, the baffle is rotated... Plate 443 is used to make the baffle 443 flush with the opening end of the cavity 43. Then, the baffle 443 is fixedly connected to the tail plate 41 by bolts to complete the installation of the overload protection module 44. It should be noted that a sealing ring is provided on one edge of the baffle 443. After the baffle 443 is fixed to the tail plate 41 by bolts, the sealing ring forms a sealed space inside the cavity 43, thereby preventing rainwater and dust from entering and affecting the service life of the internal pressure sensor 442. In addition, it is understandable that the baffle 443 is provided to facilitate the disassembly, replacement and maintenance of the overload protection module 44.

[0054] See Figure 6 and Figure 7A safety guard 9 is arranged on the upper surface of the tail plate 41 on both sides, which is used to prevent people or goods from falling from both sides during loading and unloading. The safety guard 9 includes a lower cross beam 91 fixedly connected to the tail plate 41 by bolts, an upper cross beam 92 arranged at the upper end of the lower cross beam 91, and a plurality of adjusting rods 93 arranged in the middle and connecting the upper cross beam 92 and the lower cross beam 91. In this embodiment, the adjusting rods 93 are arranged in three groups. Each adjusting rod 93 is composed of a first support rod 931 and a second support rod 932. The first support rod 931 is sleeved at one end in the second support rod 932 and can slide up and down in the second support rod 932. The other end of the first support rod 931 is hingedly connected to the upper cross beam 92. The end of the second support rod 932 away from the first support rod 931 is hingedly connected to the lower cross beam 91. A self-locking mechanism 94 is arranged between the upper cross beam 92 and the first support rod 931 of each group. The self-locking mechanism 94 includes a locking seat 941, a locking device 942, and a locking button 943. The self-locking mechanism 94 can lock the hinge connection between the first support rod 931 and the upper cross beam 92, so that the safety guard 9 will not fall after being opened. When the safety guard 9 needs to be folded, the locking button 943 is pressed to unlock the locking device 942 and the locking seat 941, so that the safety guard 9 can be folded. Figure 7 The self-locking mechanism 94 includes a locking seat 941, a locking device 942, and a locking button 943. The self-locking mechanism 94 can lock the hinge connection between the first support rod 931 and the upper cross beam 92, so that the safety guard 9 will not fall after being opened. When the safety guard 9 needs to be folded, the locking button 943 is pressed to unlock the locking device 942 and the locking seat 941, so that the safety guard 9 can be folded.

[0055] To ensure the safety of the entire device during operation, the device is also provided with an angle sensor 7, a safety sensing module 8, and a controller. The angle sensor 7 is arranged at the hinge connection between the tail plate 41 and the sliding block 2, which is used to measure the angle between the tail plate 41 and the horizontal plane, and cooperates with the anti-overweight module 44 to measure the actual weight of the goods on the panel assembly 4, thereby improving the safety of the overweight detection. The safety sensing module 8 includes a first laser sensor 81 arranged at the hinge connection between the tail plate 41 and the sliding block 2 to measure the height of the tail plate 41 relative to the bottom of the carriage, a second laser sensor 82 arranged on one side of the lower end of the tail plate 41 to measure the height of the tail plate 41 relative to the ground, and an infrared sensor 83 arranged above the tail plate 41 on the guide rail 1. The controller is connected to the angle sensor 7 and the safety sensing module 8 through wires, which is used to receive and process measurement data and control the working state of the lifting cylinder 3 and the turnover cylinder 5.

[0056] The application also provides a control method of the intelligent vertical lifting tailgate device, wherein the control method comprises an angle control method of the panel assembly 4, an overload control method of the panel assembly 4 and a control method of the safety module.

[0057] The angle control method of the panel assembly 4 comprises the following steps:

[0058] S11, the slider 2 and the panel assembly 4 are moved relative to the guide rail 1 by the lifting oil cylinder 3, and then the height value y1 between the panel assembly 4 and the carriage floor is measured by the first laser sensor 81 on the upper side of the panel assembly 4 to determine whether the panel assembly 4 is flush with the carriage floor;

[0059] S12, if yes, the controller controls the work of the turnover oil cylinder 5 to swing the panel assembly 4 to a preset angle;

[0060] S13, the extension plate 42 is pulled out to abut one end of the extension plate 42 against the ground;

[0061] Specifically, if yes, that is, the value y1 is zero, the panel assembly 4 is flush with the carriage floor, the controller can continue to control the work of the turnover oil cylinder 5 until the panel assembly 4 forms a suitable inclined angle with the ground, that is, reaches the preset angle, and the work of the turnover oil cylinder 5 is stopped. It is worth mentioning that when the value y1 is zero and the angle of the tailgate 41 is lower than the horizontal plane, the lifting oil cylinder 3 does not work. Then, the extension plate 42 on the panel assembly 4 is pulled out, and the sliding of the light and heavy goods out of the vehicle can continue. In addition, if no, that is, the value y1 is not equal to zero, it indicates that the lifting oil cylinder 3 is in the working state at this stage, that is, in the heavy lifting and unloading mode, and the turnover oil cylinder 5 does not work.

[0062] Of course, in some embodiments, after the panel assembly 4 is rotated at a random suitable angle, the relative position of the turnover oil cylinder 5 at this time can be recorded as the extension preset value of the turnover oil cylinder 5 by the control module, so as to be used quickly subsequently.

[0063] The overload control method of the panel assembly 4 comprises the following steps:

[0064] S21, before unloading, the included angle α between the panel assembly 4 and the horizontal plane is measured by the angle sensor 7 to determine whether the included angle α meets the safety angle requirement, and usually α≦10°; if the safety angle requirement is not met, the controller controls the work of the buzzer and the warning light;

[0065] Specifically, in order to prevent the overload of the panel assembly 4 caused by the excessive weight of the goods during the lifting and unloading process, before the panel assembly 4 is loaded, the controller determines whether the included angle α between the panel assembly 4 and the horizontal plane is less than or equal to 10° according to the value of the angle sensor 7, and if the angle requirement is exceeded, the controller sends a signal to control the buzzer and the warning light to issue a warning;

[0066] S22. If the safety angle requirement is met, the controller calculates the final weight borne by the panel assembly 4 according to the weight value measured by the anti-overweight module 44, and compares the final weight with the preset weight to determine whether the final weight is greater than the preset weight;

[0067] More specifically, the pressure value F measured by the pressure sensor 442 is corrected to the true weight G in combination with the angle a between the panel assembly 4 and the horizontal plane at the time, and the actual weight G is calculated by and multiple sampling, wherein the signal output by each pressure sensor 442 is independently filtered by 5-point median filtering: the real-time sampling value and the historical 4 data form a window, and the middle value is taken after sorting; the filtered data of the 5 pressure sensors 442 are taken as the respective reference data; the median values output by the 5 pressure sensors 442 are calculated in real time as the reference value, and a consistency threshold is set; if the deviation < threshold, the weight = A1 (full trust); if the deviation > threshold: weight = A2 (automatically reduce the weight of the abnormal sensor); wherein A1 > A2; the final weight is calculated by weighted fusion output: final weight = Σ (sensor value x weight) / Σ weight. For example, one of the pressure sensors 442 obtains 5 sampling values {p11, p12, p13, p14, p15}, and if the median value = p13 at this time, p13 is taken as the reference data p1 of the pressure sensor 442; the reference data {p1, p2, p3, p4, p5} of the five sensors are obtained respectively according to the same method, and the median value is selected as the reference value p0; if the reference value p0 = p3 at this time, the deviation |pi-p0| is calculated; if |pi-p0| < threshold, let its weight q = A1, if |pi-p0| > threshold, let its weight q = A2; the final weight is calculated by weighted fusion output: final weight = Σ (pi x qi) / Σ qi, and whether the goods are overweight is determined according to the final weight and the preset weight;

[0068] S23. If the final weight is greater than the preset weight, the controller controls the buzzer and warning light to work;

[0069] It can be understood that when the final weight exceeds the preset weight, i.e. overweight, the controller can control the buzzer and warning light to work, so as to avoid accidents caused by overweight.

[0070] The control method of the safety induction module 8 comprises the following steps:

[0071] S31. The controller determines whether the turnover oil cylinder 5 is in the first working state of contraction, or whether the lifting oil cylinder 3 and the turnover oil cylinder 5 are both in the second working state of elongation;

[0072] S32. If the first working state, the controller controls the infrared sensor to work, and judges whether there is a person approaching according to the signal of the infrared sensor 83, if there is a person approaching, the controller controls to stop the first working state and controls the buzzer and warning light to work;

[0073] S33. If the second working state, the controller intermittently receives the signal y1 of the distance between the first laser sensor 81 and the floor of the carriage and the signal y2 of the distance between the second laser sensor 82 and the ground, and outputs the first voltage signal and the second voltage signal through the signal conditioning circuit according to y1 and y2, and judges whether the difference between the first voltage signal and the second voltage signal exceeds the preset value;

[0074] Specifically, in the second working state, the first laser sensor 81, the second laser sensor 82 and the infrared sensor 83 work at the same time. If the panel assembly 4 is in the descending state, the first laser sensor 81 measures the distance y1 between the bottom of the carriage and the panel, and outputs an analog first voltage signal x1 through the signal conditioning circuit to represent the theoretical distance y1, and the second laser sensor 82 measures the distance y2 of the lower area, and outputs an analog second voltage signal x2 to represent the actual distance y1, and compares the signals x1 and x2; if x1>x2, and the difference exceeds the preset value, which is 10%, indicating that there is an obstacle below the tail plate, at this time the controller sends a high-frequency signal to make the lifting hydraulic cylinder stop moving and keep static state, and at the same time the high-frequency signal is transmitted to the buzzer and warning light to issue a warning; if x1<x2, and the difference exceeds 10%, indicating that there is a depression or uneven road below, at this time a high-frequency signal is sent to make the lifting hydraulic cylinder keep static state, and at the same time the high-frequency signal is transmitted to the buzzer and warning light to issue a warning; At the same time, the infrared sensor 83 detects whether there is a person in the range, if there is a person in the range, the infrared sensor 83 sends a high-frequency signal to interrupt the power of the lifting cylinder 3, and controls the buzzer and warning light to issue a warning. If the panel assembly 4 is in the unfolded state, before the turnover oil cylinder 5 works, the first laser sensor 81 and the second laser sensor 82 measure the area below the tail plate once to ensure that there is no obstacle below the tail plate before the turnover oil cylinder 5 can work.

[0075] S34, if yes, the controller controls the lifting oil cylinder 3 or the turnover oil cylinder 5 to stop working, and controls the buzzer and warning light to work.

[0076] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] The above-described embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A smart vertical lift tailgate device for use in unloading a cargo bed of a truck, comprising a mobile support, and a mounting frame vertically disposed on the mobile support, characterized in that, The intelligent vertical lifting tail plate device further comprises: a guide rail fixedly connected with the mounting frame; a sliding block arranged in the guide rail and capable of sliding up and down along the guide rail; a lifting oil cylinder for pulling the sliding block to slide up and down in the guide rail; a panel assembly comprising a tail plate hingedly connected with the sliding block and an extension plate slidably connected to one side of the tail plate; a turnover oil cylinder having one end rotatably connected with the sliding block and the other end rotatably connected with one side of the tail plate, for driving the panel assembly to rotate between 0-120° from the rear end of the mounting frame to the side facing the ground; a safety induction module and a controller; wherein the safety induction module comprises a first laser sensor arranged near the tail plate, and the first laser sensor is used to measure the distance between the panel assembly and the vehicle body floor; wherein the lifting oil cylinder, the turnover oil cylinder and the safety induction module are electrically connected with the controller.

2. The intelligent vertical lift tailgate apparatus of claim 1, wherein, The intelligent vertical lifting tail plate device further comprises an anti-falling device arranged between the lifting oil cylinder and the sliding block, for locking the relative sliding between the sliding block and the guide rail; wherein the anti-falling device comprises a connecting buckle, one end of the connecting buckle is provided with a spring, two first connecting rods are arranged on both sides of the spring, one end of the two first connecting rods is rotatably connected with the connecting buckle, the other end of the first connecting rod is rotatably connected with a brake block, a brake base is arranged between the two brake blocks, one end of the brake base is fixedly connected with the sliding block, and the other end is connected with the spring, two second connecting rods are arranged on both sides of the spring, one end of the two second connecting rods is fixedly connected with the brake base, and the other end is rotatably connected with the first connecting rod near the middle part of the first connecting rod.

3. The intelligent vertical lift tailgate apparatus of claim 2, wherein, A chain is arranged between the lifting oil cylinder and the anti-falling device, a sprocket adapted to the chain is arranged on the guide rail, one end of the chain is connected with the telescopic end of the lifting oil cylinder, and the other end of the chain is connected with the connecting buckle by passing through the sprocket.

4. The intelligent vertical lift tailgate apparatus of claim 1, wherein, One side of the extension plate is provided with a buckle for locking the sliding of the extension plate, a cavity is arranged at the lower end of the buckle on the tail plate, and an anti-overweight module is detachably arranged in the cavity; wherein the anti-overweight module comprises a fixed plate, a plurality of pressure sensors arranged on one side of the fixed plate, a baffle rotatably connected on one side of the fixed plate, and an angle sensor arranged on the tail plate for measuring the included angle between the tail plate and the horizontal plane.

5. The intelligent vertical lift tailgate apparatus of claim 1, wherein, Both ends of the upper side of the tail plate are provided with safety guardrails, the mounting guardrail comprises a lower cross beam fixedly connected with the tail plate, an upper cross beam arranged at the upper end of the lower cross beam, and a plurality of adjusting rods arranged between the upper cross beam and the lower cross beam and parallel to each other, both ends of the adjusting rod are hingedly connected with the upper cross beam and the lower cross beam, the adjusting rod comprises a first support rod connected with one end of the upper cross beam and a second support rod connected with one end of the lower cross beam, the first support rod is sleeved with the second support rod, and a self-locking mechanism is arranged between any adjusting rod and the upper cross beam.

6. The intelligent vertical lift tailgate apparatus of claim 1, wherein, The safety induction module further comprises a second laser sensor arranged at one side of the bottom of the tail plate and an infrared sensor arranged at one side of the guide rail.

7. The intelligent vertical lift tailgate apparatus of claim 2, wherein, The brake base is in an inverted isosceles trapezoidal shape, and the brake block is arranged in parallel with one side of the brake base.

8. A control method for the smart vertical lift tailgate arrangement according to any one of claims 1-7, characterized in that, The method comprises the following steps: S11, moving the slider and the panel assembly relative to the guide rail by the lifting cylinder, and then determining whether the panel assembly is flush with the carriage floor according to the height value between the panel assembly and the carriage floor measured by the first laser sensor on the upper side of the panel assembly; S12, the controller controls the operation of the turnover cylinder to swing the panel assembly to a preset angle; S13, pulling out the expansion plate to make one end of the expansion plate abut against the ground.

9. The control method according to claim 8, characterized by, The control method further comprises: S21, before unloading, measuring the included angle α between the panel assembly and the horizontal plane by the angle sensor to determine whether the included angle α meets the safety angle requirement, and if not, controlling the buzzer and warning light to work. S22, if the safety angle requirement is met, the controller calculates the final weight borne by the panel assembly according to the weight value measured by the anti-overweight module, and compares the final weight with the preset weight to determine whether the final weight is greater than the preset weight; The final weight is calculated by the following expression: F is the pressure value measured by the pressure sensor. S23, if the final weight is greater than the preset weight, the controller controls the buzzer and warning light to work.

10. The control method according to claim 8, characterized by, The control method further comprises: S31, the controller determines whether the turnover cylinder is in the first working state of contraction or whether the lifting cylinder and the turnover cylinder are both in the second working state of elongation; S32, if it is the first working state, the controller controls the infrared sensor to work, and determines whether there is personnel approaching according to the signal of the infrared sensor, and if there is personnel approaching, the controller controls to stop the first working state and controls the buzzer and warning light to work; S33, if it is the second working state, the controller intermittently receives the distance signal y1 between the carriage floor measured by the first laser sensor and the distance signal y2 between the ground measured by the second laser sensor, and outputs the first voltage signal and the second voltage signal through the signal conditioning circuit according to y1 and y2, respectively, and determines whether the difference between the first voltage signal and the second voltage signal exceeds the preset value; S34, if the difference exceeds the preset value, the controller controls the lifting cylinder or the turnover cylinder to stop working, and controls the buzzer and warning light to work.

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