A crane load detection device

Abstract

The present application relates to the technical field of crane, disclose a kind of crane load detection device, the present application solves the problem that the maximum overload material protection of existing crane load detection device is poor.The present application is driven by the rotation of the rotating disc on the surface of the driving rod by motor, the rotation of the groove opened on the surface of the rotating disc, the sliding block slides from the groove to the end far from the driving rod, the sliding block drives the sliding rod to slide outward in the sliding groove, the sliding rod drives the side block to slide outward in the sliding groove, the sliding rod drives the protection net connected by the connecting column to expand, the size of the protection net is greater than the size of the bearing plate after expansion, the protection net has the effect of receiving the material on the bearing plate, when the material falls, the protection net catches the falling material, avoids the impact of material and ground, reduces the damage of material and reduces the risk.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to a crane load detection device. BACKGROUND

[0002] The crane refers to a multi-motion hoisting machinery for vertically lifting and horizontally transporting heavy objects within a certain range. Its working characteristics are intermittent motion, frequent start, and uncertain lifting capacity. When the crane is overloaded, it will cause damage to the parts of the crane, affect the normal operation of the crane, and even cause safety accidents in serious cases. Cranes can be divided into tire cranes and bridge cranes according to their structures. The bridge crane is a hoisting device that is horizontally arranged above a workshop, warehouse or material yard to hoist and transport materials. The bridge of the bridge crane runs longitudinally along the tracks laid on the high racks on both sides. It can fully utilize the space below the bridge to hoist and transport materials without being hindered by ground equipment. However, when hoisting 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, which may cause damage to the parts of the bridge crane.

[0003] After searching, the existing Chinese patent CN116675114A discloses a crane load detection mechanism, specifically relates to the technical field of crane detection, which comprises a frame, a through hole is formed in the top of the frame, a main beam is installed in the through hole, a hoisting mechanism is arranged at the bottom of the main beam, a hook is connected to the bottom of the hoisting mechanism, a load detection assembly is arranged below the hook for detecting the load capacity of the hoisting mechanism, the load detection assembly comprises an electronic hoist scale, and the hook at the top of the electronic hoist scale is connected with the hook. The hook is connected with the hook on the electronic hoist scale, then the winch is used to wind the steel wire rope, the electronic hoist scale is used to detect the tension of the steel wire rope in real time, thereby judging the load capacity of the hoisting mechanism, at the same time, the mechanical arm drives the camera to shoot the steel wire rope, and the shot picture is transmitted to the control panel, so that the staff can stand beside the frame to check the deformation of the steel wire rope, and the frame covers the hoisting mechanism and the detection assembly, greatly improving the safety during 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 plate, and then the load plate drives the material off the ground through the winding knot. The load capacity of the load plate is recorded by the electronic scale, and the tension of the winding rope is detected by the sensor, so that the volume weight of the materials stacked on the surface of the load 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 plate may fall. This situation may cause the material to scatter and collide with the ground, causing damage to the equipment and materials, and may pose a 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, which makes it 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 response to the above problems, an innovative design was 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, which solves the problem of poor maximum overload material protection of existing crane load detection devices by adopting the device.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a crane load detection device, comprising a bridge, a controller disposed on one side of the bridge, a movable structure disposed between the bridges, a winding structure disposed at one end of the movable structure, an electronic scale disposed at one end of the winding structure, a sensor disposed on the top surface of the electronic scale, a fixed housing disposed at the bottom end of the electronic scale, pull ropes connected to the four corners of the fixed housing, and a bearing plate connected to one end of the pull rope, wherein an extension protection structure is disposed inside the bearing plate;

[0008] The moving structure includes a servo motor arranged at one end of the bridge, a screw arranged at the output end of the servo motor, a moving block threadedly connected to the surface of the screw, and a fixed frame arranged at one end of the moving block;

[0009] 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 hook hooked to one end of the hook, and the barb is connected to the electronic scale.

[0010] Further, the stretching protection structure comprises a storage groove formed in the bearing plate, a motor is arranged in the storage groove, a driving rod is arranged at the output end of the motor, a rotating disc is arranged on the surface of the driving rod, a groove is formed in the surface of the rotating disc, a sliding block is slidably arranged in the groove, a sliding rod is arranged at one end of the sliding block, a protection net is arranged at one end of the sliding rod, a fixing column is movably arranged at one end of the driving rod, an extension plate is arranged at one end of the fixing column, and the extension plate is connected with the inner wall of the storage groove.

[0011] Further, the grooves are equally spaced and arranged in four groups, the grooves are arranged in an arc shape, the sliding blocks are equally spaced and arranged in four groups, the sliding blocks slide from one end of the groove close to the driving rod to the other end, the sliding blocks drive the sliding rods to move outward, the sliding blocks slide from one end of the groove away from the driving rod to the other end, and the sliding blocks drive the sliding rods to move inward.

[0012] Further, the outer end of the fixing column is provided with a connecting plate, and a sliding groove is formed in the surface of the connecting plate.

[0013] Further, the two ends of the sliding rod are provided with a conduction driving structure, the conduction driving structure comprises a conductive block one and a conductive block three arranged at the two ends of the side block, a conductive block two and a conductive block four are arranged at the two ends of the sliding groove, the conductive block one and the conductive block two are in contact and electrified, and the conductive block three and the conductive block four are in contact and electrified.

[0014] Further, the inside of the bearing plate is provided with a buffer structure, the buffer structure comprises a groove formed in the bottom surface of the bearing plate, and four groups of grooves are equally spaced.

[0015] Further, the inside of the groove is provided with a gas cylinder, the output end of the gas cylinder is provided with a gas pipe, the middle part of the gas pipe is threadedly connected with an electromagnetic valve, the electromagnetic valve is electrically connected with the conductive block two, one end of the gas pipe is threadedly connected with an exhaust valve, one end of the exhaust valve is threadedly connected with an air bag, the air bag is accommodated in the inside of the groove, and the exhaust valve is electrically connected with the conductive block four.

[0016] Further, the inside of the fixed shell is provided with a limiting structure, the limiting structure comprises a vertical plate arranged in the inside of the fixed shell, the vertical plate is connected with the inner wall of the fixed shell, one end of the vertical plate is provided with a motor, the output end of the motor is provided with a gear, the two ends of the gear are engaged with a rack one and a rack two, one end of the rack one and the rack two is respectively connected with a short plate, one end of the short plate is respectively provided with a limiting plate, and the limiting plates are symmetrically distributed about the longitudinal center axis of the fixed shell.

[0017] Further, the inner wall of the fixed shell is provided with a long groove, the long groove is symmetrically arranged in two groups about the transverse center axis of the fixed shell, the inside of the two groups of long grooves is respectively slidably arranged with a protrusion, the two groups of protrusions are respectively connected with the rack one and the rack two, the surface of the fixed shell is provided with an opening, and the rack one and the rack two move in the opening.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] The crane load detection device provided by the present application has the following advantages: the maximum overload material protection of the existing crane load detection device is poor; the drive rod is driven to rotate by the motor, thereby driving the surface of the drive rod to rotate; the four groups of arc-shaped grooves on the surface of the rotating disc are driven to rotate, so that the protective net can be unfolded and cover the range of the falling material; the sliding block slides from the end of the groove close to the drive rod to the end far from the drive rod, so that the sliding block drives the sliding rod to slide outward in the sliding groove on the surface of the extension plate; the extension plate is connected with the fixed column, so that the sliding rod drives the side block to slide outward in the sliding groove, thereby driving the subsequent movement assembly to work; the sliding rod drives the protective net connected through the connecting column to unfold; the unfolded protective net is larger than the size of the bearing plate; the protective net has the effect of supporting the material on the bearing plate; the protective net is used as a tool for supporting the material, thereby avoiding the danger caused by the falling material; when the material falls, the protective net catches the falling material, avoids the impact of the material on the ground, reduces the damage of the material, and reduces the risk; the design realizes the automatic material protection function, does not need manual intervention, can quickly respond and unfold the protective net, thereby saving human resources and improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The present application is a whole three-dimensional structure schematic diagram;

[0021] Figure 2 The present application is a three-dimensional structure schematic diagram of the moving structure, winding structure, sensor, and electronic scale;

[0022] Figure 3 The present application is a three-dimensional structure schematic diagram of the bearing plate, extension protection structure, buffer structure, and conduction driving structure;

[0023] Figure 4 The present application is a three-dimensional structure schematic diagram of the extension protection structure;

[0024] Figure 5 The present application is a three-dimensional structure schematic diagram of the extension protection structure and the conduction driving structure;

[0025] Figure 6 The present application is a three-dimensional structure schematic diagram of the buffer structure;

[0026] Figure 7 The present application is a three-dimensional structure schematic diagram of the buffer structure;

[0027] Figure 8A three-dimensional structure diagram of the limiting structure of the present application.

[0028] In the figure: 1, bridge; 2, controller; 3, moving structure; 31, servo motor; 32, screw rod; 33, moving block; 34, fixed frame; 4, winding structure; 41, driving motor; 42, winding reel; 43, winding rope; 44, hook; 45, barb; 5, sensor; 6, electronic scale; 7, extension protection structure; 71, motor; 72, driving rod; 73, rotating disc; 74, channel; 75, sliding block; 76, sliding rod; 77, connecting plate; 78, sliding 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, gas pipe; 84, electromagnetic valve; 85, exhaust valve; 86, air bag; 9, limiting structure; 91, vertical plate; 92, motor; 93, gear; 94, rack one; 95, rack two; 96, short plate; 97, limiting plate; 98, protrusion; 99, long slot; 10, fixed shell; 11, pull rope; 12, bearing plate; 13, conductive driving structure; 131, conductive block one; 132, conductive block two; 133, conductive block three; 134, conductive block four. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] In order to further understand the content of the present application, the present application will be described in detail with reference to the drawings.

[0031] In combination Figures 1-3 A crane load detection device, comprising a bridge 1, a controller 2 arranged on one side of the bridge 1, a moving structure 3 arranged between the bridge 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, wherein the inside of the bearing plate 12 is provided with an extension protection structure 7.

[0032] The present application will be further described below in combination with the embodiments.

[0033] Please refer to Figures 1-8The moving structure 3 comprises a servo motor 31 arranged at one end of the bridge 1, a lead screw 32 arranged at an output end of the servo motor 31, a moving block 33 threadedly connected to a surface of the lead screw 32, and a fixed frame 34 arranged at one end of the moving block 33, facilitating the left and right movement of the bearing plate 12.

[0034] The winding structure 4 comprises a driving motor 41 arranged on a surface of the fixed frame 34, a winding reel 42 arranged at an output end of the driving motor 41, a winding rope 43 wound on a surface of the winding reel 42, a hook 44 connected to one end of the winding rope 43, and a barb 45 hooked at one end of the hook 44, the barb 45 being connected to the electronic scale 6, facilitating the lifting of the material placed on the surface of the bearing plate 12.

[0035] The stretching protection structure 7 comprises a storage groove 71 arranged in the bearing plate 12, the storage groove 71 being internally provided with a motor 71, the motor 71 being provided with a driving rod 72 at an output end, the driving rod 72 being provided with a rotating disc 73 on a surface, the rotating disc 73 being provided with a groove 74 on a surface, the groove 74 being internally slidably provided with a sliding block 75, one end of the sliding block 75 being provided with a sliding rod 76, one end of the sliding rod 76 being provided with a protection net 712, one end of the driving rod 72 being movably provided with a fixed column 79, one end of the fixed column 79 being provided with an extension plate 710, one end of the extension plate 710 being connected to an inner wall of the storage groove 71, the groove 74 being equidistantly provided with four groups, the four groups of grooves 74 being arc-shaped, the sliding block 75 being equidistantly provided with four groups, the sliding block 75 being slid from one end of the groove 74 close to the driving rod 72 to the other end, the sliding block 75 driving the sliding rod 76 to move outward, the sliding block 75 being slid from one end of the groove 74 away from the driving rod 72 to the other end, the sliding block 75 driving the sliding rod 76 to move inward, the outer end of the fixed column 79 being provided with a connecting plate 77, the surface of the connecting plate 77 being provided with a sliding groove 78, the surface of the sliding rod 76 being provided with a side block 713, the side block 713 being slid in the sliding groove 78, one end of the sliding rod 76 being provided with a connecting column 711, the connecting column 711 being connected to the protection net 712, the protection net 712 catching the falling material, avoiding the impact of the material with the ground.

[0036] Both ends of the sliding rod 76 are provided with a conduction driving structure 13, the conduction driving structure 13 comprising conductive blocks one 131 and three 133 arranged at both ends of the side block 713, the sliding groove 78 being provided with conductive blocks two 132 and four 134 at both ends, the conductive blocks one 131 and two 132 being in contact and electrified, the conductive blocks three 133 and four 134 being in contact and electrified, facilitating the simultaneous opening and closing of the protection net 712 and the air bag 86.

[0037] The inside of the bearing plate 12 is provided with a buffer structure 8, the buffer structure 8 includes the recess 81 opened in the bottom surface of the bearing plate 12, the recess 81 is equidistantly provided with four groups, the inside of the recess 81 is provided with the gas cylinder 82, the output end of the gas cylinder 82 is provided with the air pipe 83, the middle part of the air pipe 83 is screw connected with the electromagnetic valve 84, the electromagnetic valve 84 is electrically connected with the conductive block two 132, one end of the air pipe 83 is screw connected with the exhaust valve 85, one end of the exhaust valve 85 is screw connected with the air bag 86, the air bag 86 is accommodated in the inside of the recess 81, the exhaust valve 85 is electrically connected with the conductive block four 134, the impact force of the bearing plate 12 and the ground is reduced.

[0038] The inside of the fixed shell 10 is provided with a limiting structure 9, the limiting structure 9 includes the vertical plate 91 arranged in the inside of the fixed shell 10, the vertical plate 91 is connected with the inner wall of the fixed shell 10, one end of the vertical plate 91 is provided with the motor 92, the output end of the motor 92 is provided with the gear 93, the both ends of the gear 93 are engaged with the rack one 94 and the rack two 95, one end of the rack one 94 and the rack two 95 is respectively connected with the short plate 96, one end of the short plate 96 is respectively provided with the limiting plate 97, the limiting plate 97 is symmetrically distributed about the longitudinal center axis of the fixed shell 10, the inner wall of the fixed shell 10 is provided with the long slot 99, the long slot 99 is symmetrically provided with two groups about the transverse center axis of the fixed shell 10, the inside of the two groups of long slots 99 is respectively slidably provided with the protruding block 98, the two groups of protruding blocks 98 are respectively connected with the rack one 94 and the rack two 95, the surface of the fixed shell 10 is provided with the opening, the rack one 94 and the rack two 95 move in the opening, the problem of material falling caused by the shaking of the winding rope 43 in the lifting process is avoided.

[0039] Specifically, first, the staff places the material on the bearing plate 12, starts from small material, and then successively stacks the material on the bearing plate 12, so the material bearing value and the load value of the bearing plate 12 can be detected in turn, the external controller 2 starts the drive motor 41, the drive motor 41 drives the reel 42 at the output end to rotate, the reel 42 drives the winding rope 43 connected on the surface to wind, so that the winding rope 43 drives the barb 45 hung by one end of the hook 44 to move upwards, the barb 45 drives the electronic scale 6 connected by one end to move upwards, the two groups of sensors 5 arranged at the top end of the electronic scale 6 detect the tension of the winding rope 43, the electronic scale 6 drives the fixed shell 10 to move upwards, the fixed shell 10 drives the bearing plate 12 connected by the pull rope 11 at four corners to move upwards, at this time, the bearing plate 12 places the material with the largest volume, the maximum load value is detected, the external controller 2 starts the servo motor 31, the servo motor 31 drives the screw 32 at the output end to rotate, one end of the screw 32 is movably connected with the bridge 1, the screw 32 is threadedly connected with the moving block 33, the moving block 33 drives the drive motor 41 fixed by one end of the fixed frame 34 to move left and right, so as to drive the material on the surface of the bearing plate 12 to move left and right;

[0040] When the material load on the bearing plate 12 exceeds the load capacity of the winding rope 43, the winding rope 43 is prone to breakage when the load exceeds the rated load capacity, the sensor 5 timely transmits data to the controller 2, the controller 2 analyzes and drives the motor 71 arranged in the storage slot of the bearing 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 with the extension plate 710 through the connecting column 711 connected in an active manner, so that the driving rod 72 drives the turntable 73 on the surface to rotate, the turntable 73 drives the four groups of arc-shaped grooves 74 on the surface to rotate, the sliding block 75 slides from one end of the driving rod 72 to the other end of the driving rod 72, so that the sliding block 75 drives the sliding rod 76 to slide outward in the sliding groove 78 arranged on the surface of the extension plate 710, the 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 outward in the sliding groove 78, the sliding rod 76 drives the protective net 712 connected through the connecting column 711 to unfold, and then the unfolded protective net 712 is larger than the size of the bearing plate 12, the protective net 712 has the effect of receiving the material on the bearing plate 12, so that the protection can be quickly formed in the moment of material falling, the impact of the material on the ground is reduced, when the material falls, the protective net 712 timely captures and protects the falling material, avoids the impact of the material on the ground, reduces the damage of the material, and reduces the danger, the design realizes the automatic material protection function, does not need manual intervention, can quickly respond and unfold the protective net 712, so that the human resources can be saved, and the work efficiency is improved;

[0041] The controller 2 starts the motor 92 fixed with the vertical plate 91 in the fixed shell 10, the motor 92 drives the gear 93 at the output end to rotate, the gear 93 is engaged with the rack one 94 and the rack two 95, the rack one 94 and the rack two 95 move in opposite directions, the rack one 94 and the rack two 95 respectively drive the protrusions 98 on the surfaces to slide in the long grooves 99 in opposite directions, the rack one 94 and the rack two 95 move in the openings arranged on the surface of the fixed shell 10, the rack one 94 and the rack two 95 respectively drive the short plates 96 at one end to move in opposite directions and close to the material, the two groups of short plates 96 drive the two groups of limiting plates 97 to clamp and fix the material on the bearing plate 12, so that the problem of material falling caused by the shaking of the winding rope 43 in the lifting process is avoided, and the stability and reliability of the work are ensured;

[0042] When the side blocks 713 drive the conductive block one 131 at one end to move to the outermost end of the sliding groove 78, the conductive block one 131 is in contact with the conductive block two 132 arranged in the outermost end of the sliding groove 78 to be electrified, so that the conductive block one 131 and the conductive block two 132 are connected in electricity and start the electromagnetic valve 84, the electromagnetic valve 84 opens the gas cylinder 82 fixed inside the groove 81, so that the gas in the gas cylinder 82 is transported to the inside of the air bag 86 through the air pipe 83 to inflate, the air bag 86 is in a cylindrical shape, and four groups of air bags 86 are expanded to lift the bearing plate 12 to a certain height, thereby effectively reducing the impact force and achieving the buffering effect, at the same time, the materials are caught by the protective net 712 and the lifting and buffering of the air bag 86 to reduce the impact force between the bearing plate 12 and the ground, when the sliding block 75 drives the sliding rod 76 to move reversely to reset, the sliding rod 76 drives the side blocks 713 on both sides to move to the fixed column 79 inside the sliding groove 78 to be close, the side blocks 713 drive the conductive block three 133 at the other end to be in contact with the conductive block four 134 arranged in the sliding groove 78 close to one end of the fixed column 79 to be electrified, the conductive block three 133 and the conductive block four 134 start the exhaust valve 85 connected in electricity, so that the exhaust valve 85 can transport the gas in the air bag 86 back to the inside of the gas cylinder 82, the pressure of the air bag 86 can be adjusted according to the needs, so that the bearing capacity is improved, at the same time, the four groups of air bags 86 act on different directions to realize the buffering and support in each direction, the bearing capacity is more powerful, and the air bag buffering system has the advantages of simple structure, easy installation and maintenance.

[0043] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A crane load detection device, comprising a bridge (1), a controller (2) arranged on one side of the bridge (1), a moving structure (3) arranged between the bridges (1), the moving structure (3) comprising a servo motor (31) arranged at one end of the bridge (1), a lead screw (32) arranged at the output end of the servo motor (31), a moving block (33) threadedly connected to the surface of the lead screw (32), a fixed frame (34) arranged at one end of the moving block (33), a winding structure (4) arranged at one end of the moving structure (3), the winding structure (4) comprising a drive motor (41) arranged on the surface of the fixed frame (34), a winding reel (42) arranged at the output end of the drive motor (41), a winding rope (43) wound on the surface of the winding reel (42), a hook (44) connected at one end of the winding rope (43), and a barb (45) hooked at one end of the hook (44), the barb (45) being connected with an electronic scale (6). The utility model relates to a winding structure (4) and electronic scale (6) are provided at one end of winding structure (4), sensor (5) is provided at the top surface of electronic scale (6), and the top end of electronic scale (6) is provided with two groups of sensors (5) and carries out detection to the tension of winding rope (43), fixed shell (10) is provided at the bottom end of electronic scale (6), pull rope (11) is connected at the four corners of fixed shell (10), and the load bearing plate (12) is connected at one end of pull rope (11), characterized in that: The inside of the bearing plate (12) is provided with an extension protection structure (7). The extension protection structure (7) comprises a storage groove opened in the inside of the bearing plate (12), the inside of the storage groove is provided with a motor (71), the output end of the motor (71) is provided with a driving rod (72), the surface of the driving rod (72) is provided with a rotating disc (73), the surface of the rotating disc (73) is provided with a groove (74), the inside of the groove (74) is slidably provided with a sliding block (75), one end of the sliding block (75) is provided with a sliding rod (76), one end of the sliding rod (76) is provided with a protective net (712), one end of the driving rod (72) is movably provided with a fixed column (79), one end of the fixed column (79) is provided with an extension plate (710), and one end of the extension plate (710) is connected with the inner wall of the storage groove. The groove (74) is equally spaced to have four groups, the four groups of groove (74) are arc-shaped, the sliding block (75) is equally spaced to have four groups, the sliding block (75) slides from one end of the groove (74) close to the driving rod (72) to the other end, the sliding block (75) drives the sliding rod (76) to move outward, the sliding block (75) slides from one end of the groove (74) away from the driving rod (72) to the other end, and the sliding block (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 sliding groove (78), and the surface of the sliding rod (76) is provided with a side block (713) which slides in the sliding groove (78). One end of the sliding rod (76) is provided with a connecting column (711), and the connecting column (711) is connected with the protective net (712).

2. A load detection device for a crane as claimed in claim 1, characterized in that The two ends of the sliding rod (76) are provided with a conduction driving structure (13), the conduction driving structure (13) comprises conductive block one (131) and conductive block three (133) arranged at the two ends of the side block (713), and the two ends of the sliding groove (78) are respectively provided with conductive block two (132) and conductive block four (134), the conductive block one (131) and the conductive block two (132) are in contact and electrified, and the conductive block three (133) and the conductive block four (134) are in contact and electrified.

3. A load detection device for a crane as claimed in claim 2, characterised in that: The inside of the bearing plate (12) is provided with a buffer structure (8), the buffer structure (8) includes the recess (81) opened in the bottom surface of the bearing plate (12), the recess (81) is equidistantly provided with four groups.

4. A load detection device for a crane as claimed in claim 3, characterised in that: The inside of the recess (81) is provided with a gas cylinder (82), the output end of the gas cylinder (82) is provided with a gas pipe (83), the middle part of the gas pipe (83) is threadedly connected with a solenoid valve (84), the solenoid valve (84) is electrically connected with the second conductive block (132), one end of the gas pipe (83) is threadedly connected with an exhaust valve (85), one end of the exhaust valve (85) is threadedly connected with an air bag (86), the air bag (86) is accommodated in the inside of the recess (81), the exhaust valve (85) is electrically connected with the fourth conductive block (134).

5. A load detection device for a crane as claimed in claim 1, characterized in that: The inside of the fixed shell (10) is provided with a limiting structure (9), the limiting structure (9) includes the vertical plate (91) arranged in the inside of the fixed shell (10), the vertical plate (91) is connected with the inner wall of the fixed shell (10), one end of the vertical plate (91) is provided with a motor (92), the output end of the motor (92) is provided with a gear (93), the two ends of the gear (93) are engaged with the rack one (94) and the rack two (95), the one end of the rack one (94) and the rack two (95) is respectively connected with a short plate (96), one end of the short plate (96) is respectively provided with a limiting plate (97), the limiting plate (97) is symmetrically distributed about the longitudinal center axis of the fixed shell (10).

6. A load detection device for a crane as claimed in claim 5, characterised in that: The inner wall of the fixed shell (10) is provided with a long groove (99), the long groove (99) is symmetrically provided with two groups about the transverse center axis of the fixed shell (10), the inside of the two groups of long grooves (99) is respectively slidably provided with a protruding block (98), the two groups of protruding blocks (98) are respectively connected with the rack one (94) and the rack two (95), the surface of the fixed shell (10) is provided with an opening, the rack one (94) and the rack two (95) move in the opening.

Images