Overload protection-based crane for multiple scenes and control system thereof

Abstract

The invention relates to the field of cranes, and provides an overload protection-based crane for multiple scenes and a control system thereof.The overload protection-based crane comprises a shell, a shell cavity is formed in the shell, a driving system is connected in the shell cavity, a chain wheel assembly is connected to the driving system, a telescopic block is slidably connected to the inner wall of a groove, and the telescopic block is connected with the inner wall of the groove through a first elastic piece; a wear-resistant bag is fixedly connected to the connecting seat, a powder storage box is slidably connected to the inner wall of the shell cavity, an L-shaped blocking piece is slidably connected to the bottom wall of the powder storage box, a through hole is formed in the L-shaped blocking piece, a powder storage cavity is formed in the powder storage box, and the powder storage cavity is filled with powder. The top wall of the powder storage box is connected with the top wall of the shell cavity through a second elastic piece, a rack is fixedly connected to the powder storage box, a gear is rotatably connected to the inner wall of the shell cavity, a blocking toothed plate is slidably connected to the inner wall of the shell cavity, and a brake block is connected to the bottom wall of the blocking toothed plate through a buffer block. Flexible buffering speed reduction can be achieved before the chain wheel assembly is stopped from rotating.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a multi-scenario crane based on overload protection and a control system thereof. Background Art

[0002] The authorized utility model patent with publication number CN221343639U discloses a large-load lightweight electric hoist double-beam crane, including a crane double-beam structure, outriggers, a crane electric hoist, a power-off anti-fall machine and a lifting hook. The two ends of the crane double-beam structure are respectively fixedly installed with outriggers, the crane electric hoist is slidably installed on the crane double-beam structure, the power-off anti-fall machine is fixedly installed on the frame of the crane electric hoist, and the power-off anti-fall machine is connected to the lifting hook through a steel cable; when the heavy cargo of the utility model falls rapidly from top to bottom, the steel cable drives the retracting and releasing core roller of the power-off anti-fall machine to rotate at high speed, and the locking core shafts at both ends of the retracting and releasing core rollers also rotate at high speed, and the centrifugal force generated by the locking core shaft acts on the engaging body inside it. Under the action of the centrifugal force, the engaging body moves outward and is fixed with its engaging teeth, causing the retracting and releasing core roller to stop rotating, thereby stopping the falling of the heavy cargo.

[0003] However, in the above-mentioned patent, when the engaging body moves outward under the action of centrifugal force, the rotation speed of the core-releasing roller is already very fast. When the cargo is heavy, the impact force when the engaging body and the engaging teeth contact is relatively large. Without the advance deceleration of the buffer component, the engaging body and the engaging teeth are easily broken, which not only damages the components but also may fail to prevent the cargo from falling. Summary of the Invention

[0004] In response to the above technical problems, the present invention aims to provide a multi-scenario crane based on overload protection and its control system. To solve the above technical problems, the present invention adopts the following technical solutions: The sprocket wheel of the embodiment of the present invention is a gear wheel that is fixed on the gear train of the present invention, and the gear train that is fixed on the gear train of the present invention is fixed on the gear train of the present invention.

[0005] Preferably, a first permanent magnet is fixedly connected to the bottom wall of the vertical section of the L-shaped baffle, a limiting plate is slidably connected to the connecting seat, and a second permanent magnet is fixedly connected to the top wall of the limiting plate.

[0006] Preferably, a powder guide frame is fixedly connected to the top wall of the wear-resistant bag, and the top wall of the powder guide frame is an inclined surface.

[0007] Preferably, a slide rail is fixedly connected to the powder storage box, and the L-shaped baffle is slidably connected to the slide rail.

[0008] Preferably, a damping mechanism is provided on the slide rail, and the damping mechanism and the L-shaped baffle are in abutment against each other.

[0009] Preferably, the damping mechanism is a sponge strip.

[0010] Preferably, the limiting piece is slidably connected to the two extensions on the connecting seat.

[0011] Preferably, a hook is fixed to the lower end of the chain.

[0012] Preferably, the drive system includes a motor and a reducer fixed to the inner wall of the shell cavity, the output shaft on the motor is fixed to the input shaft of the reducer, the sprocket assembly is fixed to the output shaft of the reducer, and the sprocket assembly is rotatably connected to the inner wall of the shell cavity.

[0013] A control system for a multi-scenario crane based on overload protection, based on the multi-scenario crane based on overload protection, includes a controller, the controller is connected to the shell, and the controller is provided with a button module, a processing module and a wireless module.

[0014] The present invention has the following beneficial effects: When the chain falls rapidly, the telescopic block automatically transmits the power using centrifugal force, automatically filling the wear-resistant bag with powder to expand it. Flexible buffering and deceleration are achieved through the flexible buffering of the limit bar, the wear-resistant bag and the powder, effectively avoiding the breakage of the limit bar, the blocking tooth plate and other components and the impact damage of the cargo. After the powder is released, the powder storage box uses the interaction between gravity and elastic force to create a linkage between itself, the rack, gear, and blocking tooth plate, automatically triggering the brake block to contact the sprocket assembly, achieving further mechanical deceleration, significantly improving safety, and cooperating with the rigid blocking of the blocking tooth plate to achieve multi-level deceleration protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0016] Figure 1This is a schematic structural diagram of a multi-scenario crane based on overload protection according to the present invention; Figure 2 This is a structural schematic diagram of one angle of a multi-scenario crane based on overload protection according to the present invention; Figure 3 This is a structural schematic diagram of one angle of a multi-scenario crane based on overload protection according to the present invention; Figure 4 This invention Figure 2 Schematic diagram of the shell cavity structure in the middle shell; Figure 5 This invention Figure 4 Left side view of the middle connector, powder storage box, and sprocket assembly; Figure 6 This invention Figure 5 A top view of the middle sprocket assembly, blocking tooth plate, and connecting seat; Figure 7 This invention Figure 5 Schematic diagram of the structure of the powder guide frame; Figure 8 This invention Figure 5 Schematic diagram of the structure of the middle connecting seat; Figure 9 This invention Figure 5 Schematic diagram of the structure of the intermediate powder storage box; Figure 10 This invention Figure 4 Schematic diagram of the motor structure; Figure 11 This invention Figure 4 Schematic diagram of the internal structure of the medium reducer.

[0017] Figure numerals: 1. outer shell; 2. chain; 3. hook body; 4. controller; 5. sprocket assembly; 6. shell cavity; 7. motor; 8. reducer; 9. blocking tooth plate; 10. groove; 11. elastic part 1; 12. telescopic block; 13. limit strip; 14. connecting seat; 15. wear-resistant bag; 16. powder guide frame; 17. powder storage box; 18. L-shaped baffle; 19. perforation; 20. rack; 21. powder storage cavity; 22. powder; 23. gear; 24. buffer block; 25. brake block; 26. permanent magnet 1; 27. limit plate; 28. permanent magnet 2; 29. ​​elastic part 2. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] like Figures 1-11As shown, a multi-scenario crane based on overload protection includes a shell 1, a shell cavity 6 is provided on the shell 1, a drive system is connected in the shell cavity 6, a sprocket assembly 5 is connected to the drive system, the drive system provides power for the movement of the sprocket assembly 5, a groove 10 is provided on the sprocket assembly 5, a telescopic block 12 is slidably connected to the inner wall of the groove 10, the telescopic block 12 is connected to the inner wall of the groove 10 through an elastic member 11, a limiting strip 13 is fixed on the sprocket assembly 5, the sprocket assembly 5 is wrapped with a chain 2, the chain 2 can adopt a Hoistalloy load chain to provide long-term and reliable use, a connecting seat 14 is fixed to the inner wall of the shell cavity 6, a wear-resistant bag 15 is fixed to the connecting seat 14, the wear-resistant bag 15 can adopt high-strength wear-resistant fiber material, such as one of aramid fiber, nylon canvas, and polyester fiber composite materials, a powder storage box 17 is slidably connected to the inner wall of the shell cavity 6, and the powder storage box 17 The bottom wall is slidably connected with an L-shaped baffle 18, and a perforation 19 is provided on the L-shaped baffle 18. A powder storage cavity 21 is provided on the powder storage box 17, and the powder storage cavity 21 is connected to the bottom wall of the powder storage box 17. The powder storage cavity 21 is filled with powder 22. The powder 22 can be selected from one or more of talcum powder, silica sand, quartz sand, rubber particles, and wood powder. These materials have certain fluidity and buffering properties. The top wall of the powder storage box 17 is connected to the top wall of the shell cavity 6 through an elastic member 29. A rack 20 is fixed to the powder storage box 17, and a gear 23 is rotatably connected to the inner wall of the shell cavity 6. The inner wall of the shell cavity 6 is slidably connected to a blocking gear plate 9. The rack 20 and the blocking gear plate 9 are respectively meshed with the gear 23. The bottom wall of the blocking gear plate 9 is connected to a brake block 25 through a buffer block 24. The brake block 25 can use a material with a high friction coefficient, such as polyurethane rubber, nitrile rubber, phenolic resin-based friction material or a metal-ceramic composite friction plate.

[0022] In addition, some parts inside the crane are lubricated with non-oxidizing grease, which has strong lubrication performance and long service life. The drive system enables chain 2 to lift cargo with a maximum weight of 3 tons.

[0023] The top wall of the housing 1 may be provided with a hook or an electric trolley mechanism to achieve fixed lifting and mobile lifting.

[0024] The crane of the present invention can be used in a variety of scenarios, such as ports, factories, commercial sites, etc., to realize port container lifting, factory cargo lifting, and various object lifting at commercial sites.

[0025] According to an optional embodiment of the present invention, the bottom wall of the vertical section of the L-shaped baffle 18 is fixedly connected to a permanent magnet 1 26, and a limiting plate 27 is slidably connected to the connecting seat 14. The top wall of the limiting plate 27 is fixedly connected to a permanent magnet 2 28. The limiting plate 27 is a hollow structure, and the material of the limiting plate 27 includes plastic, so that the limiting plate 27 is light in weight and can be easily adsorbed by magnetic force.

[0026] According to an optional embodiment of the present invention, the top wall of the wear-resistant bag 15 is fixedly connected to a powder guide frame 16, and the top wall of the powder guide frame 16 is a slope, which is used to guide the powder 22 to flow smoothly into the wear-resistant bag 15, thereby improving the filling accuracy of the buffer medium and ensuring that effective buffering is quickly formed at the moment the goods fall.

[0027] According to an optional embodiment of the present invention, a slide rail is fixedly connected to the powder storage box 17, and the L-shaped baffle 18 is slidably connected to the slide rail.

[0028] According to an optional embodiment of the present invention, a damping mechanism is provided on the slide rail, and the damping mechanism and the L-shaped baffle 18 are in abutment against each other. The damping mechanism is used to prevent the L-shaped baffle 18 from being displaced when the housing 1 moves.

[0029] According to an optional embodiment of the present invention, the damping mechanism is a sponge strip.

[0030] According to an optional embodiment of the present invention, the limiting piece 27 is slidably connected to the two extensions on the connecting seat 14 .

[0031] According to an optional embodiment of the present invention, a hook body 3 is fixedly connected to the lower end of the chain 2. The material of the hook body 3 includes hardened forged steel. The hardened forged steel is a high-performance steel optimized through the dual processes of forging and hardening heat treatment. It has high hardness (HRC50-65) and strength (>1500MPa) and is suitable for lifting heavy cargo. The structure of the hook body 3 adopts a latch-type hook, which can prevent the cargo from unhooking.

[0032] According to an optional embodiment of the present invention, the drive system includes a motor 7 and a reducer 8 fixed to the inner wall of the shell cavity 6, the output shaft on the motor 7 and the input shaft of the reducer 8 are fixed, the sprocket assembly 5 is fixed to the output shaft of the reducer 8, and the sprocket assembly 5 is rotatably connected to the inner wall of the shell cavity 6.

[0033] A multi-scenario crane control system based on overload protection, based on the aforementioned multi-scenario crane, includes a controller 4 connected to the housing 1 and equipped with a button module, a processing module, and a wireless module. The button module is used to control the crane, including inputting commands such as start, stop, and mode switching. The processing module is used to receive commands and sensor data from the button module and wireless module, perform logical operations and judgments, and control the operation of the actuator. The wireless module enables wireless communication with external terminal devices for remote monitoring, data transmission, and receiving control commands.

[0034] Implementation process: Operation and control are performed through the button module on the controller 4, and the processing module controls the motor 7 to work. After the output shaft of the motor 7 is decelerated by the reducer 8, the reducer 8 output shaft rotates slowly and outputs a large torque, thereby driving the sprocket assembly 5 to rotate. The output shaft of the motor 7 rotates in different directions, so that the sprocket assembly 5 can store and release the chain 2, so that the chain 2 can lift and put down the goods. When the sprocket assembly 5 is working normally, the speed is slow. The telescopic block 12 in the sprocket assembly 5 is kept in the groove 10 under the elastic force of the elastic member 11. The L-shaped baffle 18 blocks the powder storage chamber 21. The limit plate 27 blocks the wear-resistant bag 15 to prevent the wear-resistant bag 15 from extending to the left of the connecting seat 14 and rubbing against the limit bar 13. The brake block 25 does not abut against the sprocket assembly 5.

[0035] When the goods are at a high place, if the chain 2 falls due to component failure due to various reasons (such as overload, power failure, damaged parts, etc.), the sprocket assembly 5 will accelerate its rotation, and the telescopic block 12 will overcome the elastic force of the elastic member 11 under the action of centrifugal force and extend to the outside of the groove 10. When the telescopic block 12 rotates clockwise, it will push the L-shaped baffle 18 to the right, so that the permanent magnet 1 26 moves to above the permanent magnet 2 28. The magnetic attraction of the permanent magnet 1 26 attracts the permanent magnet 2 28, so that the limit plate 27 moves along As the extension on the connecting seat 14 moves upward, the limiting piece 27 releases the limit on the wear-resistant bag 15, and the L-shaped baffle 18 moves right to the through-hole 19 and communicates with the powder storage chamber 21. The powder 22 in the powder storage chamber 21 passes through the through-hole 19 under the action of its own gravity and falls onto the powder guide frame 16. It enters the wear-resistant bag 15 under the guidance of the powder guide frame 16, causing the wear-resistant bag 15 to expand. The wear-resistant bag 15 extends to the left of the connecting seat 14. When the limiting bar 13 rotates, it will counteract the wear-resistant bag 15, and the powder 22 in the wear-resistant bag 15 will be limited. The strip 13 is squeezed and moved, and the limit strip 13 realizes flexible buffering and deceleration through the cooperation of the wear-resistant bag 15 and the powder 22. After the powder storage box 17 gradually loses the powder 22, the mass of the powder storage box 17 gradually becomes smaller, and the powder storage box 17 moves up along the inner wall of the shell cavity 6 under the elastic force of the elastic member 29. The rack 20 moves up to drive the gear 23 to rotate, and the gear 23 drives the blocking tooth plate 9 to move down. The brake block 25 on the blocking tooth plate 9 and the sprocket assembly 5 are offset, and the sprocket assembly 5 is further decelerated, and the blocking tooth plate 9 continues When the load is lowered, the buffer block 24 is compressed. When the limit bar 13 rotates to contact the blocking tooth plate 9, the blocking tooth plate 9 blocks the limit bar 13 to achieve rigid deceleration, thereby preventing the sprocket assembly 5 from continuing to rotate and causing the goods to fall. Since the sprocket assembly 5 has passed the dual flexible buffer deceleration of the wear-resistant bag 15 and the brake block 25, the impact force of the limit bar 13 on the blocking tooth plate 9 will be greatly reduced when the rigid deceleration of the blocking tooth plate 9 is performed, thereby avoiding the limit bar 13 or the blocking tooth plate 9 from breaking when the goods are heavy.

[0036] The present invention has the following beneficial effects: When the chain 2 falls rapidly, the telescopic block 12 automatically transmits the power 22 to fill the wear-resistant bag 15 with the powder 22 to expand it. The flexible buffering and deceleration are achieved through the flexible buffering of the limit bar 13, the wear-resistant bag 15 and the powder 22, effectively avoiding the breakage of the limit bar 13, the blocking tooth plate 9 and other components and the impact damage of the cargo. Through the attraction structure of the permanent magnet 1 26, the permanent magnet 28 and the limit plate 27, in conjunction with the movement of the L-shaped baffle 18, the limit of the wear-resistant bag 15 is automatically released in the event of component failure, allowing the wear-resistant bag 15 to extend to the left of the connecting seat 14 to form a buffer. No additional electronic control response is required, and the operation is fast and reliable. After the powder 22 is released, the powder storage box 17 uses the interaction of gravity and elastic force to link itself with the rack 20, gear 23, and blocking tooth plate 9, automatically triggering the brake block 25 to contact the sprocket assembly 5, achieving further mechanical deceleration, significantly improving safety, and cooperating with the rigid blocking of the blocking tooth plate 9 to achieve multi-level deceleration protection; The inclined surface structure of the powder guide frame 16 allows the powder 22 to flow smoothly into the wear-resistant bag 15, thereby improving the filling accuracy of the buffer medium; The overall structure realizes a combined braking mode of flexible buffering of the wear-resistant bag 15 and the powder 22, secondary buffering of the brake block 25, and rigid blocking of the blocking tooth plate 9 when the cargo falls. While ensuring safety, it reduces the damage of the impact force to the limit bar 13, blocking tooth plate 9 and other components, thereby extending the service life of the whole machine and protecting the safety of cargo and personnel.

[0037] The components, modules, mechanisms and devices not described in detail in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A multi-scenario crane based on overload protection, comprising a housing (1), wherein a housing cavity (6) is provided on the housing (1), and characterized in that: The shell cavity (6) is connected to a driving system, and the driving system is connected to a sprocket assembly (5). A groove (10) is provided on the sprocket assembly (5), and the inner wall of the groove (10) is slidably connected to a telescopic block (12), and the telescopic block (12) is connected to the inner wall of the groove (10) through an elastic member (11). A limiting strip (13) is fixed to the sprocket assembly (5), and the sprocket assembly (5) is wound and connected to a chain (2). The inner wall of the shell cavity (6) is fixed to a connecting seat (14), and a wear-resistant bag (15) is fixed to the connecting seat (14). The inner wall of the shell cavity (6) is slidably connected to a powder storage box (17), and the bottom wall of the powder storage box (17) is slidably connected to an L-shaped baffle (18). A through hole (19) is provided on the letter baffle (18), a powder storage cavity (21) is provided on the powder storage box (17), the powder storage cavity (21) is communicated with the bottom wall of the powder storage box (17), the powder storage cavity (21) is filled with powder (22), the top wall of the powder storage box (17) is connected to the top wall of the shell cavity (6) through the elastic member 2 (29), a rack (20) is fixed on the powder storage box (17), the inner wall of the shell cavity (6) is rotatably connected to the gear (23), the inner wall of the shell cavity (6) is slidably connected to the blocking tooth plate (9), the rack (20) and the blocking tooth plate (9) are respectively engaged with the gear (23), and the bottom wall of the blocking tooth plate (9) is connected to the brake block (25) through the buffer block (24).

2. The multi-scenario crane based on overload protection according to claim 1 is characterized in that: A permanent magnet 1 (26) is fixedly connected to the bottom wall of the vertical section of the L-shaped baffle (18), a limiting plate (27) is slidably connected to the connecting seat (14), and a permanent magnet 2 (28) is fixedly connected to the top wall of the limiting plate (27).

3. The multi-scenario crane based on overload protection according to claim 2 is characterized in that: The top wall of the wear-resistant bag (15) is fixedly connected to a powder guide frame (16), and the top wall of the powder guide frame (16) is an inclined surface.

4. The multi-scenario crane based on overload protection according to claim 3 is characterized in that: A slide rail is fixedly connected to the powder storage box (17), and the L-shaped baffle (18) is slidably connected to the slide rail.

5. The multi-scenario crane based on overload protection according to claim 4 is characterized in that: A damping mechanism is provided on the slide rail, and the damping mechanism and the L-shaped baffle (18) are in abutment with each other.

6. The multi-scenario crane based on overload protection according to claim 5 is characterized in that: The damping mechanism is a sponge strip.

7. The multi-scenario crane based on overload protection according to claim 6 is characterized in that: The limiting piece (27) is slidably connected to the two extensions on the connecting seat (14).

8. The multi-scenario crane based on overload protection according to claim 7 is characterized in that: A hook body (3) is fixedly connected to the lower end of the chain (2).

9. The multi-scenario crane based on overload protection according to claim 8 is characterized in that: The drive system comprises a motor (7) and a reducer (8) fixedly connected to the inner wall of the housing cavity (6); an output shaft on the motor (7) is fixedly connected to an input shaft of the reducer (8); the sprocket assembly (5) is fixedly connected to the output shaft of the reducer (8); and the sprocket assembly (5) is rotatably connected to the inner wall of the housing cavity (6).

10. A multi-scenario crane control system based on overload protection, characterized in that: A multi-scenario crane based on overload protection according to any one of claims 1 to 9 comprises a controller (4), wherein the controller (4) is connected to the housing (1), and the controller (4) is provided with a button module, a processing module and a wireless module.

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