Crane load detection device

Abstract

The invention relates to the technical field of cranes, discloses a crane load detection device, and solves the problem that an existing crane load detection device is poor in maximum overload material protection. Through the driving rod, a rotating disc, a channel, a sliding block, a sliding rod, a connecting plate, a sliding groove, a fixing column, an extension plate, a connecting column, a protective net and a side block, the rotating disc on the surface of the driving rod is driven by a motor to rotate, the rotating disc drives the channel formed in the surface to rotate, and the sliding block slides outwards from the end, close to the driving rod, of the channel to the end, away from the driving rod, of the channel; the sliding blocks drive the sliding rods to slide outwards in the sliding grooves, the sliding rods drive the side edge blocks to slide towards the outer ends in the sliding grooves, the sliding rods drive the protective net connected through the connecting columns to be unfolded, the size of the unfolded protective net is larger than that of the bearing plate, the protective net has the effect of bearing materials on the bearing plate, and when the materials fall, the protective net catches the falling materials, so that the materials are prevented from falling off. Materials are prevented from colliding with the ground, damage to the materials is reduced, and danger is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, and in particular to a crane load detection device. Background Art

[0002] A crane refers to a multi-action lifting machinery that lifts heavy objects vertically and moves them horizontally within a certain range. Its working characteristics are intermittent movement, frequent starts, and uncertain lifting capacity. When the crane is overloaded, it will cause damage to the components of the crane, affecting the normal operation of the crane. In serious cases, it may even cause safety accidents. Cranes can be divided into tire cranes and bridge cranes according to their structure. Bridge cranes are lifting equipment that are horizontally mounted above workshops, warehouses, and material yards to lift materials. The bridge of the bridge crane runs longitudinally along the tracks laid on the elevated structures on both sides. The space under the bridge can be fully utilized to lift materials without being hindered by ground equipment. However, when lifting goods, the load of the bridge crane needs to be tested first to prevent the goods from exceeding the load range of the bridge crane and causing damage to the components of the bridge crane.

[0003] After searching, the existing Chinese patent CN116675114A discloses a crane load detection mechanism, which specifically relates to the field of crane detection technology, including a frame, a through hole is opened at the top of the frame, a main beam is installed in the through hole, a lifting mechanism is arranged at the bottom of the main beam, a hook is connected to the bottom of the lifting mechanism, a load detection component is arranged below the hook, which is used to detect the load capacity of the lifting mechanism, and the load detection component includes an electronic crane scale, and the hook at the top of the electronic crane scale is connected to the hook. The present invention is connected with the hook on the electronic crane scale through the hook, and then the wire rope is wound by the winch, and the tension of the wire rope is detected in real time by the electronic crane scale, so as to judge the load capacity of the lifting mechanism, and at the same time, the mechanical arm is used to drive the camera to shoot the wire rope, and the shot picture is transmitted to the control panel, so that the staff can stand next to the frame to check the deformation of the wire rope, and the frame is used to cover the lifting mechanism and the detection component, which greatly improves the safety during the detection.

[0004] The above patent covers the lifting mechanism and detection components by setting a frame, which greatly improves the safety during detection. However, there are still some problems during operation: during operation, the above crane load detection device first places the smallest material on the load-bearing plate, and then drives the material off the ground by winding the knot. The load capacity of the load-bearing plate is recorded by an electronic scale, and the tension of the winding rope is detected by a sensor, so that the volume weight of the materials piled on the surface of the load-bearing plate increases from small to large, so that the maximum load of the crane can be detected and obtained. When the maximum load is detected, the winding rope may break, and then the load-bearing plate may fall down. This situation may cause the material to scatter and collide with the ground, causing damage to the equipment and materials, and may cause danger to nearby workers. The existing device is not equipped with a protective device, and it is difficult to gather the material when it falls, so it is inconvenient to effectively avoid the problems caused by the scattering of materials. This may cause the material to be scattered in the surrounding area, increasing the workload of cleaning and maintenance. The lack of protective measures makes the existing device unable to meet the relevant safety standards and specifications.

[0005] In view of the above problems, an innovative design is carried out based on the original crane load detection device. Summary of the invention

[0006] The object of the present invention is to provide a crane load detection device, by which the device is employed to work, thereby solving the problem of poor maximum overload material protection of existing crane load detection devices.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a crane load detection device, comprising a bridge, a controller arranged on one side of the bridge, a moving structure arranged between the bridges, a winding structure arranged at one end of the moving structure, an electronic scale arranged at one end of the winding structure, a sensor arranged on the top surface of the electronic scale, a fixed shell arranged at the bottom end of the electronic scale, a pull rope connected to the four corners of the fixed shell, and a bearing plate connected to one end of the pull rope, wherein an extension protection structure is arranged inside the bearing plate; The moving structure includes a servo motor arranged at one end of the bridge, a lead screw arranged at the output end of the servo motor, a moving block threadedly connected to the surface of the lead screw, and a fixed frame arranged at one end of the moving block; The winding structure includes a driving motor arranged on the surface of the fixed frame, a winding rope arranged on the driving motor and wound on the surface of the reel, a hook connected to one end of the winding rope, a barb hooked on one end of the hook, and the barb hook is connected to the electronic scale.

[0008] Furthermore, the extension protection structure includes a storage slot opened inside the bearing plate, a motor is arranged inside the storage slot, a driving rod is arranged at the output end of the motor, a turntable is arranged on the surface of the driving rod, a groove is opened on the surface of the turntable, a slider slides inside the groove, a sliding rod is arranged at one end of the sliding rod, a protective net is arranged at one end of the sliding rod, a fixed column is movably arranged at one end of the driving rod, an extension plate is arranged at one end of the fixed column, and one end of the extension plate is connected to the inner wall of the storage slot.

[0009] Furthermore, the grooves are opened in four groups at equal intervals, the four groups of grooves are arc-shaped, and the sliders are arranged in four groups at equal intervals. The slider slides from one end of the groove close to the driving rod to the other end, and the slider drives the sliding rod to move outward. The slider slides from one end of the groove away from the driving rod to the other end, and the slider drives the sliding rod to move inward.

[0010] Furthermore, a connecting plate is provided at the outer end of the fixing column, and a sliding groove is provided on the surface of the connecting plate.

[0011] Furthermore, a conductive driving structure is provided at both ends of the sliding rod, and the conductive driving structure includes a conductive block 1 and a conductive block 3 arranged at both ends of the side blocks, and a conductive block 2 and a conductive block 4 are respectively provided at both ends of the sliding groove, and the conductive block 1 is in contact with the conductive block 2 and is energized, and the conductive block 3 is in contact with the conductive block 4 and is energized.

[0012] Furthermore, a buffer structure is arranged inside the carrying plate, and the buffer structure comprises grooves opened on the bottom surface of the carrying plate, and four groups of grooves are opened at equal intervals.

[0013] Furthermore, a gas cylinder is arranged inside the groove, and an air pipe is arranged at the output end of the gas cylinder. A solenoid valve is threadedly connected to the middle part of the air pipe, and the solenoid valve is electrically connected to the second conductive block. An exhaust valve is threadedly connected to one end of the air pipe, and an air bag is threadedly connected to one end of the exhaust valve. The air bag is accommodated inside the groove, and the exhaust valve is electrically connected to the fourth conductive block.

[0014] Furthermore, a limiting structure is arranged inside the fixed shell, and the limiting structure includes a vertical plate arranged inside the fixed shell, the vertical plate is connected to the inner wall of the fixed shell, a motor is arranged at one end of the vertical plate, a gear is arranged at the output end of the motor, rack 1 and rack 2 are meshed at both ends of the gear, short plates are respectively connected to one end of rack 1 and rack 2, and a limiting plate is respectively arranged at one end of the short plates, and the limiting plates are symmetrically distributed about the longitudinal center axis of the fixed shell.

[0015] Furthermore, the inner wall of the fixed shell is provided with a long groove, and two groups of long grooves are symmetrically provided about the transverse center axis of the fixed shell. A protrusion is sliding inside each of the two groups of long grooves, and the two groups of protrusions are respectively connected to rack one and rack two. An opening is provided on the surface of the fixed shell, and rack one and rack two move in the opening.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a crane load detection device. The existing crane load detection devices have poor protection against maximum overload materials. The present invention uses a driving rod, a turntable, a groove, a slider, a slide bar, a connecting plate, a slide groove, a fixed column, an extension plate, a connecting column, a protective net and a side block. The driving rod at the output end is driven by a motor to rotate, so that the driving rod drives the turntable on the surface to rotate, and the turntable drives the four groups of arc-shaped grooves on the surface to rotate, so that the protective net can be unfolded and cover the range where the material falls, and the slider slides from one end of the groove close to the driving rod to the outside to the end away from the driving rod, so that the slider drives the slide bar to slide outward in the slide groove opened on the surface of the extension plate, and the extension plate and the fixed plate are connected. The columns are connected and fixed, so that the sliding rod drives the side blocks to slide to the outer end inside the slide slot, driving the subsequent motion components to work, and the sliding rod drives the protective net connected by the connecting column to unfold, and then the protective net is larger than the size of the load-bearing plate after unfolding. The protective net has the effect of receiving the materials on the load-bearing plate, and the protective net is used as a tool for carrying materials, thereby avoiding the danger caused by falling materials. When the materials fall, the protective net will catch the fallen materials to avoid the collision of the materials with the ground, reduce the damage of the materials, and reduce the danger. The design realizes the automatic material protection function, does not require human intervention, and can quickly respond and unfold the protective net, which can save human resources and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the mobile structure, winding structure, sensor and electronic scale of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the bearing plate, the stretching protection structure, the buffer structure and the conduction driving structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the stretchable protection structure of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the stretchable protection structure and the conductive drive structure of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the buffer structure of the present invention; Figure 7 It is a three-dimensional enlarged structural schematic diagram of the buffer structure of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting structure of the present invention.

[0018] In the figure: 1, bridge; 2, controller; 3, moving structure; 31, servo motor; 32, lead screw; 33, moving block; 34, fixed frame; 4, winding structure; 41, driving motor; 42, reel; 43, winding rope; 44, hook; 45, barb; 5, sensor; 6, electronic scale; 7, extension protection structure; 71, motor; 72, driving rod; 73, turntable; 74, groove; 75, slider; 76, slide rod; 77, connecting plate; 78, slide groove; 79, fixed column; 710, extension plate; 711, connecting column; 712, Protective net; 713, side block; 8, buffer structure; 81, groove; 82, gas cylinder; 83, air pipe; 84, solenoid valve; 85, exhaust valve; 86, airbag; 9, limiting structure; 91, vertical plate; 92, motor; 93, gear; 94, rack one; 95, rack two; 96, short plate; 97, limiting plate; 98, bump; 99, long groove; 10, fixed shell; 11, pull rope; 12, bearing plate; 13, conduction drive structure; 131, conductive block one; 132, conductive block two; 133, conductive block three; 134, conductive block four. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0021] Combination Figure 1-Figure 3 A crane load detection device includes a bridge 1, a controller 2 arranged on one side of the bridge 1, a moving structure 3 arranged between the bridges 1, a winding structure 4 arranged at one end of the moving structure 3, an electronic scale 6 arranged at one end of the winding structure 4, a sensor 5 arranged on the top surface of the electronic scale 6, a fixed shell 10 arranged at the bottom end of the electronic scale 6, a pull rope 11 connected to the four corners of the fixed shell 10, and a bearing plate 12 connected to one end of the pull rope 11, and an extension protection structure 7 is arranged inside the bearing plate 12.

[0022] The present invention will be further described below in conjunction with the embodiments.

[0023] See also Figure 1-8 The moving structure 3 includes a servo motor 31 disposed at one end of the bridge 1, a screw rod 32 disposed at the output end of the servo motor 31, a moving block 33 threadedly connected to the surface of the screw rod 32, and a fixed frame 34 disposed at one end of the moving block 33, so as to facilitate the left and right movement of the carrying plate 12; The winding structure 4 includes a driving motor 41 arranged on the surface of the fixed frame 34, a reel 42 arranged at the output end of the driving motor 41, a winding rope 43 wound on the surface of the reel 42, a hook 44 connected to one end of the winding rope 43, and a barb 45 hooked to one end of the hook 44. The barb 45 is connected to the electronic scale 6 to facilitate lifting the material placed on the surface of the carrier plate 12. The extension protection structure 7 includes a storage slot provided inside the carrier plate 12, a motor 71 is provided inside the storage slot, a driving rod 72 is provided at the output end of the motor 71, a turntable 73 is provided on the surface of the driving rod 72, a groove 74 is provided on the surface of the turntable 73, a slider 75 is slidably provided inside the groove 74, a slide bar 76 is provided at one end of the slider 75, a protection net 712 is provided at one end of the slide bar 76, a fixed column 79 is movably provided at one end of the driving rod 72, an extension plate 710 is provided at one end of the fixed column 79, and one end of the extension plate 710 is connected to the inner wall of the storage slot, four groups of grooves 74 are provided at equal intervals, the four groups of grooves 74 are arc-shaped, and the sliders 75 are evenly spaced. There are four groups of spacings, the slider 75 slides from one end of the groove 74 close to the driving rod 72 to the other end, the slider 75 drives the sliding rod 76 to move outward, the slider 75 slides from one end of the groove 74 away from the driving rod 72 to the other end, the slider 75 drives the sliding rod 76 to move inward, the outer end of the fixed column 79 is provided with a connecting plate 77, the surface of the connecting plate 77 is provided with a slide groove 78, the surface of the sliding rod 76 is provided with a side block 713, the side block 713 slides inside the slide groove 78, one end of the sliding rod 76 is provided with a connecting column 711, the connecting column 711 is connected to the protective net 712, the protective net 712 catches the fallen materials to prevent the materials from colliding with the ground.

[0024] A conductive driving structure 13 is provided at both ends of the slide rod 76, and the conductive driving structure 13 includes a conductive block 131 and a conductive block 133 arranged at both ends of the side block 713. A conductive block 132 and a conductive block 134 are respectively provided at both ends of the slide groove 78. The conductive block 131 is in contact with the conductive block 2 132 and is energized, and the conductive block 3 133 and the conductive block 4 134 are in contact with each other and are energized, so that the protective net 712 and the airbag 86 can be opened and closed at the same time.

[0025] A buffer structure 8 is provided inside the supporting plate 12, and the buffer structure 8 includes a groove 81 opened on the bottom surface of the supporting plate 12, and four groups of grooves 81 are opened at equal intervals. A gas cylinder 82 is provided inside the groove 81, and an air pipe 83 is provided at the output end of the gas cylinder 82. A solenoid valve 84 is threadedly connected to the middle part of the air pipe 83, and the solenoid valve 84 is electrically connected to the conductive block 132. An exhaust valve 85 is threadedly connected to one end of the air pipe 83, and an air bag 86 is threadedly connected to one end of the exhaust valve 85. The air bag 86 is accommodated in the groove 81, and the exhaust valve 85 is electrically connected to the conductive block 134 to reduce the impact force between the supporting plate 12 and the ground.

[0026] The fixed shell 10 is provided with a limiting structure 9 inside, and the limiting structure 9 includes a vertical plate 91 arranged inside the fixed shell 10, and the vertical plate 91 is connected to the inner wall of the fixed shell 10, and a motor 92 is arranged at one end of the vertical plate 91, and a gear 93 is arranged at the output end of the motor 92, and a rack 1 94 and a rack 2 95 are meshed at both ends of the gear 93, and a short plate 96 is connected to one end of the rack 1 94 and the rack 2 95, and a limiting plate 97 is arranged at one end of the short plate 96, and the limiting plate 97 is about the fixed shell 10. The fixed shell 10 is symmetrically distributed about the longitudinal center axis, and a long groove 99 is provided on the inner wall of the fixed shell 10. Two groups of long grooves 99 are symmetrically provided about the transverse center axis of the fixed shell 10. A protrusion 98 is slidably provided inside the two groups of long grooves 99. The two groups of protrusions 98 are respectively connected to rack 1 94 and rack 2 95. An opening is provided on the surface of the fixed shell 10, and rack 1 94 and rack 2 95 move in the opening to avoid the problem of material falling caused by the shaking of the winding rope 43 during the lifting process.

[0027] Specifically, first, the staff places the materials on the carrier plate 12, starting with the small materials, and then sequentially stacking the materials and placing them on the carrier plate 12, so that the material carrying value and the load value of the carrier plate 12 can be detected in turn, and the driving motor 41 is started by the external controller 2, and the driving motor 41 drives the reel 42 at the output end to rotate, and the reel 42 drives the winding rope 43 connected to the surface to wind, so that the winding rope 43 drives the barb 45 hung by the hook 44 at one end to move upward, and the barb 45 drives the electronic scale 6 connected at one end to move upward, and two sets of sensors 5 are arranged on the top of the electronic scale 6 to drive the winding rope 43 to move upward. 43 pulling force is detected, the electronic scale 6 drives the fixed shell 10 to move upward, and the fixed shell 10 drives the load-bearing plate 12 connected at the four corners by the pull rope 11 to move upward. At this time, the heaviest material is placed on the load-bearing plate 12, and the maximum load value is detected. The servo motor 31 is started through the external controller 2, and the servo motor 31 drives the screw rod 32 at the output end to rotate. One end of the screw rod 32 is movably connected to the bridge frame 1, and the screw rod 32 is threadedly connected to the moving block 33. The moving block 33 drives the driving motor 41 fixed by the fixed frame 34 at one end to move left and right, thereby driving the material on the surface of the load-bearing plate 12 to move left and right; The material load on the carrier plate 12 exceeds the carrying capacity of the winding rope 43. The winding rope 43 is prone to breakage when the load exceeds its rated carrying capacity. The sensor 5 transmits the data to the controller 2 in time. After analysis, the controller 2 drives the motor 71 set inside the storage slot opened on the carrier plate 12. The motor 71 drives the driving rod 72 at the output end to rotate. One end of the driving rod 72 is fixed to the extension plate 710 through a movable connecting column 711, so that the driving rod 72 drives the turntable 73 on the surface to rotate, and the turntable 73 drives the four groups of arc-shaped grooves 74 opened on the surface to rotate. The slider 75 slides from the end of the groove 74 close to the driving rod 72 to the outside to the end away from the driving rod 72, so that the slider 75 drives the sliding rod 76 to the outside in the sliding groove 78 opened on the surface of the extension plate 710. The sliding extension plate 710 is connected and fixed with the fixed column 79, so that the sliding rod 76 drives the side block 713 to slide to the outer end inside the sliding groove 78, and the sliding rod 76 drives the protective net 712 connected by the connecting column 711 to unfold, and then the protective net 712 is larger than the size of the load-bearing plate 12 after unfolding, and the protective net 712 has the effect of receiving the material on the load-bearing plate 12, so that protection can be quickly formed at the moment of material falling, and the impact of the material with the ground can be reduced. When the material falls, the protective net 712 will capture and protect the fallen material in time to avoid the impact of the material with the ground, reduce the damage of the material, and reduce the danger. This design realizes the automatic material protection function, without manual intervention, and can quickly respond and unfold the protective net 712, which can save human resources and improve work efficiency; The controller 2 starts the motor 92 fixed on the vertical plate 91 inside the fixed shell 10, and the motor 92 drives the gear 93 at the output end to rotate, and the gear 93 meshes with the rack 1 94 and the rack 2 95, and the rack 1 94 and the rack 2 95 move in opposite directions, and the rack 1 94 and the rack 2 95 respectively drive the protrusion 98 on the surface to slide in the opposite direction in the long groove 99, and the rack 1 94 and the rack 2 95 move in the opening opened on the surface of the fixed shell 10, and the rack 1 94 and the rack 2 95 respectively drive the short plates 96 at each end to move in the opposite direction to approach the material, and the two groups of short plates 96 drive the two groups of limit plates 97 to clamp and fix the material on the carrying plate 12, so as to avoid the problem of material falling caused by the shaking of the winding rope 43 during the lifting process, thereby ensuring the stability and reliability of the work; When the side block 713 drives the conductive block 131 at one end to move outward to the outermost end of the slide slot 78, the conductive block 131 contacts the conductive block 2 132 set in the outermost end of the slide slot 78 and is energized, so that the solenoid valve 84 electrically connected to the conductive block 131 and the conductive block 2 132 is started, and the solenoid valve 84 opens the gas cylinder 82 fixed inside the groove 81, so that the gas inside the gas cylinder 82 is transported to the inside of the airbag 86 through the air pipe 83 to swell. The airbag 86 is cylindrical. After the four groups of airbags 86 are deployed, the support plate 12 is lifted to a certain height, thereby effectively reducing the impact force and achieving a buffering effect. At the same time, the material is caught by the protective net 712 to catch the fallen material and the lifting buffer of the airbag 86, reducing the impact force between the support plate 12 and the ground. When the slider 7 When the slide bar 76 is driven to move in the reverse direction and reset, the slide bar 76 drives the side blocks 713 on both sides to move closer to the fixed column 79 in the slide slot 78, and the side blocks 713 drive the conductive block 3 133 at the other end to contact the conductive block 4 134 provided in the slide slot 78 close to one end of the fixed column 79 to be energized, and the conductive block 3 133 and the conductive block 4 134 are electrically connected to the exhaust valve 85, so that the exhaust valve 85 can transport the gas in the air bag 86 back to the inside of the gas cylinder 82, and the pressure of the air bag 86 can be adjusted as needed to improve its bearing capacity. At the same time, the four groups of air bags 86 act in different directions, which can realize buffering and support in various directions, and the bearing capacity is stronger. The air bag buffer system has a simple structure and is easy to install and maintain.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane load detection device, comprising a bridge (1), a controller (2) arranged at one side of the bridge (1), a moving structure (3) arranged between the bridges (1), a winding structure (4) arranged at one end of the moving structure (3), an electronic scale (6) arranged at one end of the winding structure (4), a sensor (5) arranged on the top surface of the electronic scale (6), a fixed shell (10) arranged at the bottom end of the electronic scale (6), a pull rope (11) connected to four corners of the fixed shell (10), and a bearing plate (12) connected to one end of the pull rope (11), characterized in that: An extension protection structure (7) is provided inside the carrying plate (12); The moving structure (3) comprises a servo motor (31) arranged at one end of the bridge (1), a screw rod (32) arranged at the output end of the servo motor (31), a moving block (33) threadedly connected to the surface of the screw rod (32), and a fixed frame (34) arranged at one end of the moving block (33); The winding structure (4) comprises a driving motor (41) arranged on the surface of the fixing frame (34), a reel (42) arranged at the output end of the driving motor (41), a winding rope (43) wound on the surface of the reel (42), a hook (44) connected to one end of the winding rope (43), and a barb (45) hooked to one end of the hook (44); the barb (45) is connected to the electronic scale (6).

2. A crane load detection device according to claim 1, characterized in that: The extension protection structure (7) comprises a storage slot provided inside the bearing plate (12), a motor (71) being provided inside the storage slot, a driving rod (72) being provided at the output end of the motor (71), a rotating disk (73) being provided on the surface of the driving rod (72), a groove (74) being provided on the surface of the rotating disk (73), a slider (75) sliding inside the groove (74), a sliding rod (76) being provided at one end of the slider (75), a protection net (712) being provided at one end of the sliding rod (76), a fixing column (79) being movably provided at one end of the driving rod (72), an extension plate (710) being provided at one end of the fixing column (79), and one end of the extension plate (710) being connected to the inner wall of the storage slot.

3. A crane load detection device according to claim 2, characterized in that: The grooves (74) are provided in four groups at equal intervals, and the four groups of grooves (74) are arc-shaped. The sliders (75) are provided in four groups at equal intervals. The sliders (75) slide from one end of the groove (74) close to the driving rod (72) to the other end, and the sliders (75) drive the sliding rod (76) to move outward. The sliders (75) slide from one end of the groove (74) away from the driving rod (72) to the other end, and the sliders (75) drive the sliding rod (76) to move inward.

4. A crane load detection device according to claim 3, characterized in that: The outer end of the fixed column (79) is provided with a connecting plate (77), the surface of the connecting plate (77) is provided with a sliding groove (78), and the surface of the sliding rod (76) is provided with a side block (713), and the side block (713) slides inside the sliding groove (78).

5. A crane load detection device according to claim 4, characterized in that: A connecting column (711) is provided at one end of the sliding rod (76), and the connecting column (711) is connected to the protective net (712).

6. A crane load detection device according to claim 5, characterized in that: The two ends of the slide bar (76) are provided with a conductive drive structure (13), the conductive drive structure (13) comprising a conductive block 1 (131) and a conductive block 3 (133) arranged at the two ends of the side block (713), and the two ends of the slide groove (78) are respectively provided with a conductive block 2 (132) and a conductive block 4 (134), the conductive block 1 (131) and the conductive block 2 (132) are in contact and energized, and the conductive block 3 (133) and the conductive block 4 (134) are in contact and energized.

7. A crane load detection device according to claim 6, characterized in that: A buffer structure (8) is provided inside the carrying plate (12), and the buffer structure (8) comprises grooves (81) provided on the bottom surface of the carrying plate (12), and four groups of grooves (81) are provided at equal intervals.

8. A crane load detection device according to claim 7, characterized in that: A gas cylinder (82) is arranged inside the groove (81); an air pipe (83) is arranged at the output end of the gas cylinder (82); a solenoid valve (84) is threadedly connected to the middle of the air pipe (83); the solenoid valve (84) is electrically connected to the second conductive block (132); one end of the air pipe (83) is threadedly connected to an exhaust valve (85); one end of the exhaust valve (85) is threadedly connected to an air bag (86); the air bag (86) is received inside the groove (81); and the exhaust valve (85) is electrically connected to the fourth conductive block (134).

9. A crane load detection device according to claim 1, characterized in that: A limiting structure (9) is arranged inside the fixed shell (10), the limiting structure (9) comprising a vertical plate (91) arranged inside the fixed shell (10), the vertical plate (91) being connected to the inner wall of the fixed shell (10), a motor (92) being arranged at one end of the vertical plate (91), a gear (93) being arranged at the output end of the motor (92), a rack 1 (94) and a rack 2 (95) being meshed at both ends of the gear (93), a short plate (96) being connected at one end of the rack 1 (94) and the rack 2 (95), a limiting plate (97) being arranged at one end of each of the short plates (96), and the limiting plates (97) being symmetrically distributed about the longitudinal center axis of the fixed shell (10).

10. A crane load detection device according to claim 9, characterized in that: The inner wall of the fixed shell (10) is provided with a long groove (99), and two groups of the long grooves (99) are symmetrically provided about the transverse central axis of the fixed shell (10). A protrusion (98) is slidably provided inside each of the two groups of the long grooves (99), and the two groups of the protrusions (98) are respectively connected to the first rack (94) and the second rack (95). The surface of the fixed shell (10) is provided with an opening, and the first rack (94) and the second rack (95) move in the opening.

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