An electric lifting and unloading device for containers

Abstract

The present invention discloses an electric lifting and unloading device for containers, which relates to the technical field of container lifting. The unloading device comprises a vehicle carrier and a gantry lifting frame. The gantry lifting frame is installed on the vehicle carrier through a hydraulic system. A chassis is arranged above the gantry lifting frame, and a power assembly is arranged inside the chassis. Four upper slings and several lower slings are connected to the power assembly. A boom mounting platform is connected to the gantry lifting frame through several upper slings below. Telescopic arms are arranged on both sides of the boom mounting platform. A pair of guides are symmetrically arranged below each of the telescopic arms. Two lower slings are connected to each of the guides. The magnetic wheels use magnetic attraction to make the guides move in close contact with the edge of the container, effectively preventing the guides from shaking during the descent, so that the unloading device can be operated on a shaking platform.

Description

Technical Field

[0001] The invention relates to the technical field of container hoisting, in particular to an electric lifting and unloading device for a container. Background Art

[0002] A container unloading device generally refers to a container gantry mobile unloading device, which is used in railways, docks or container transshipment centers. According to different application scenarios, the size, movement method and lifting tonnage of the container gantry mobile unloading device are different. Generally, the way the gantry unloading device lifts the container depends on the tonnage of the container. Lighter containers are lifted from the top and heavier containers are lifted from the bottom. However, the lifting holes of the container often deform or rust after a long period of lifting work, making the connection of the lifting and fixing part unstable, which is easy to cause danger during the lifting process. For containers with larger tonnage, after the sling is lowered, due to the wind speed in the on-site environment, the shaking of the lifting platform and other reasons, the sling cannot be automatically fixed with the lifting holes at the bottom of the container, and manual assistance is required on site, which poses hidden risks to the personal safety of the operators and is very inconvenient to use. Summary of the invention

[0003] The object of the present invention is to provide an electric lifting and unloading device for a container to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric lifting and unloading device for containers, comprising a vehicle carrier and a gantry lifting frame, wherein the gantry lifting frame is installed on the vehicle carrier through a hydraulic system, a chassis is arranged above the gantry lifting frame, a power assembly is arranged inside the chassis, four upper slings and several lower slings are connected to the power assembly, the gantry lifting frame is connected to a boom mounting platform through several upper slings below, telescopic arms are arranged on both sides of the boom mounting platform, a pair of guides are symmetrically arranged below each of the telescopic arms, and each of the guides is connected to two lower slings.

[0005] Furthermore, the power assembly includes an upper worm gear and a lower worm gear, the upper worm gear is located above the lower worm gear, an upper capstan is coaxially arranged on one side of the upper worm gear close to the lower worm gear, and a lower capstan is coaxially arranged on one side of the lower worm gear close to the upper worm gear, and a diameter of the lower capstan is larger than that of the upper capstan, four upper slings are connected to the lower capstan, and several lower slings are connected to the upper capstan, and four movable pulleys are rotatably installed above the boom mounting platform, one end of each of the upper slings passes around the movable pulley and is connected to the gantry lifting frame, the operator assumes that the lifting device lifts and transports the container, and moves the unloading device above the container, the control system controls the auxiliary motor and the main motor to work simultaneously, the auxiliary motor drives the lower worm gear to rotate through the lower worm gear, the lower worm gear drives the lower capstan to rotate, the main motor drives the torque wheel to rotate through the flower-shaped transmission wheel, the torque wheel drives the upper worm gear to rotate through the upper worm gear, the upper worm gear drives the upper capstan to rotate, the upper slings and the lower slings are simultaneously lowered, so that the boom mounting platform and the support device are simultaneously lowered.

[0006] Furthermore, a hydraulic system is provided inside the boom mounting platform, and the two telescopic arms are slidably mounted on the boom mounting platform through the hydraulic system, and a pair of self-locking pins are symmetrically provided on each telescopic arm, and the self-locking pins are slidably connected to the telescopic arm, and a thrust spring is provided between the self-locking pins and the telescopic arm, and a first electromagnet is provided inside the telescopic arm, and the first electromagnet is connected to a control system through a circuit, and the first electromagnet attracts the self-locking pin, and a slope is provided at the bottom of one side of the self-locking pin extending out of the telescopic arm, so that the length of the container to be hoisted can be adjusted according to the needs. The control system controls the hydraulic system in the boom mounting platform to extend the two telescopic arms outward until the self-locking pin is aligned with the lifting position of the container, the boom mounting platform continues to descend, the self-locking pin contacts the lifting hole of the container, the self-locking pin first shrinks to the inside of the telescopic arm, and then bounces into the hole under the action of the thrust spring, so that the telescopic arm is buckled with the upper part of the container. After the boom mounting platform is buckled with the container, the auxiliary motor stops working, the upper sling stops lowering, and the main motor continues to drive the upper winch to rotate, and the lower sling continues to be lowered.

[0007] Furthermore, each of the telescopic arms is provided with a guide hole, the lower sling passes through the guide hole and is connected to the support, the support is provided with an inner right-angle groove, and several magnetic wheels are rotatably installed inside the support, the outer ring of the magnetic wheel is wrapped with elastic material, and the magnetic wheel extends out of the plane of the inner right-angle groove, and each of the supports is provided with a second electromagnet, and the second electromagnet is connected to the control system circuit. When the self-locking pin is buckled into the lifting hole of the container, the inner right-angle grooves of the four supports are also aligned with the four edges of the container. As the lower sling is lowered, the support descends along the edge of the container, and the magnetic wheels use magnetic attraction to make the support move in line with the edge of the container, effectively preventing the support from shaking during the descent, so that the unloading device can be operated on a shaking platform.

[0008] Furthermore, two sliding holes are provided on the supporter, and a through groove is provided at the position of the supporter corresponding to the sliding hole, a limiting wheel is rotatably installed in the through groove, a straight hook is slidably installed in the sliding hole, a spring is connected between the straight hook and the supporter, and a round hole is provided in the middle of each straight hook, and the lower sling passes through the round hole of the straight hook. When the supporter moves to the lifting card hole at the bottom of the container, the main motor stops working, the lower sling stops descending, and the control system controls the second electromagnet to be energized, and the supporter is adsorbed on the container by strong magnetic force, and the main motor starts to reverse. Since the friction between the supporter and the container is large after adsorption, the supporter cannot be pulled to move when the lower sling starts to be reeled.

[0009] Furthermore, the power assembly includes an upper worm and a lower worm, the upper worm is meshingly connected with the upper worm wheel, the lower worm is meshingly connected with the lower worm wheel, one end of the upper worm is coaxially connected with the torque wheel, one end of the lower worm wheel is coaxially connected with the driven gear, an idler gear is arranged on the connecting shaft between the upper worm and the torque wheel, the idler gear is meshingly transmitted with the driven gear, as the lower layer of slings is tightened and straightened, the lower layer of slings makes the straight hook overcome the tension of the spring and push outward, the straight hook extends into the lifting card hole at the bottom of the container, the straight hook supports the bottom of the container, at this time, the top of the container is buckled by the telescopic arm, and the bottom of the container is connected by the support device.

[0010] Furthermore, an auxiliary motor is connected to the side of the driven gear away from the lower worm gear, and the auxiliary motor is connected to the control system circuit. A flower-shaped groove is provided on the side of the torque wheel away from the upper worm gear, and a flower-shaped transmission wheel is arranged in the flower-shaped groove. The end of the flower-shaped transmission wheel away from the torque wheel is connected to the main motor. When lifting, the flower-shaped transmission wheel squeezes the inner slider, and the inner slider squeezes the torque wheel through a return spring, and the torque wheel drives the upper worm gear to rotate. As the lower layer of lifting rope is tightened, the bearing capacity of the upper capstan increases, and the transmission load of the upper worm gear increases until the inner slider is squeezed into the torque wheel by the flower-shaped transmission wheel, and the inner slider squeezes the connecting sliding column, and the connecting sliding column moves toward the direction of the idle gear until the engaging teeth are engaged with the radial slot, and the torque wheel drives the idle gear to rotate, and the idle gear drives the driven gear to rotate, and the driven gear drives the lower capstan to rotate through the lower worm gear, that is, the lower layer of lifting rope and the upper layer of lifting rope are wound up at the same time to lift the container.

[0011] Furthermore, a plurality of inner sliding blocks are slidingly arranged in the torque wheel, and the plurality of inner sliding blocks are evenly distributed in a ring shape, and a return spring is arranged between each inner sliding block and the torque wheel, and a connecting sliding column is arranged on one side of the torque wheel corresponding to each inner sliding block, and a return spring is also arranged between each connecting sliding column and the inside of the torque wheel, and a slope is arranged on the end of the connecting sliding column close to the inner sliding block. During the hoisting stage, through the setting of the torque wheel, the lower lifting cable is linked to the upper lifting cable and tightened at the same time after being tightened, and the container is hoisted upward through the upper hoisting card hole and the lower hoisting card hole at the same time, so that the hoisting force is more uniform, and even if some of the lifting card holes of the container are rusted and damaged, the hoisting can still be continued, and the hoisting process is smoother. The magnetic small wheel is used to automatically move and position the support, eliminating the need for manual connection and fixation of the hoisting card holes below the container, and it is more convenient and flexible in a narrow operating space.

[0012] Furthermore, a radial groove is provided on one side of the idler gear near the torque wheel, and an engaging tooth is provided on one side of the connecting slide column near the idler gear, and the engaging tooth cooperates with the radial groove. When the container is hoisted to the destination point, the second electromagnet is powered off, the main motor first drives the upper capstan to loosen the lower sling, and the straight hook is retracted under the tension of the spring, and then the upper capstan is used to loosen the lower sling and recover it. Since there is no hanging object on the support device at this time, the transmission load of the upper worm gear increases less, so the flower-shaped transmission wheel does not need to squeeze the inner slider into the torque wheel to drive the torque wheel to rotate, the engaging tooth and the radial groove cannot be engaged together, and the rotation of the lower worm gear and the rotation of the upper worm gear will not interfere with each other. After all the support devices are retracted, the control system energizes the first electromagnet to suck the self-locking pin into the telescopic arm, and the auxiliary motor drives the lower capstan to rotate through the lower worm gear to retract the upper sling. After the boom mounting platform is lifted, the first electromagnet is powered off, and the self-locking pin pops out and resets.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. During the hoisting stage, by setting the torque wheel, the lower lifting rope is tightened and then linked to the upper lifting rope and tightened at the same time, and the container is hoisted upward through the upper and lower lifting holes at the same time, so that the hoisting force is more uniform. Even if some of the container lifting holes are rusted and damaged, the hoisting can still be carried out, and the hoisting process is more stable.

[0015] 2. The magnetic wheel uses magnetic attraction to make the supporter move along the edge of the container, effectively preventing the supporter from shaking during the descent, so that the unloading device can be operated on a shaking platform. The magnetic wheel is used to automatically move and position the supporter, eliminating the need for manual connection and fixation of the lifting holes under the container, making it more convenient and flexible in a narrow operating space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall appearance structure of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 2 The overall appearance structure of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 3 It is a structural schematic diagram of the gantry lifting frame part of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the telescopic arm part of the present invention;

[0020] Figure 5 It is a schematic structural diagram of the guide device part of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure inside the chassis of the present invention.

[0022] Figure 7 The connection structure of the torque wheel of the present invention is shown in FIG. Figure 1 .

[0023] Figure 8 The connection structure of the torque wheel of the present invention is shown in FIG. Figure 2 .

[0024] Fig. 9 It is a schematic diagram of the internal structure of the torque wheel of the present invention.

[0025] In the figure: 1. vehicle carrier; 2. gantry lifting frame; 3. chassis; 4. boom mounting platform; 5. telescopic arm; 6. self-locking pin; 7. movable pulley; 8. upper sling; 9. guide; 10. straight hook; 11. lower sling; 12. limit wheel; 13. spring; 14. magnetic small wheel; 15. upper worm wheel; 16. upper worm; 17. lower worm wheel; 18. lower worm; 19. auxiliary motor; 20. main motor; 21. driven gear; 22. idler gear; 23. torque wheel; 24. flower-shaped transmission wheel; 25. inner slider; 26. connecting slide column; 27. upper capstan; 28. lower capstan. DETAILED DESCRIPTION

[0026] 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.

[0027] Example: Figure 1-Figure 9 As shown, the present invention provides a technical solution, an electric lifting and unloading device for containers, comprising a vehicle carrier 1 and a gantry lifting frame 2, the gantry lifting frame 2 is installed on the vehicle carrier 1 through a hydraulic system, a chassis 3 is arranged above the gantry lifting frame 2, a power assembly is arranged inside the chassis 3, four upper slings 8 and several lower slings 11 are connected to the power assembly, the gantry lifting frame 2 is connected to a boom mounting platform 4 through several upper slings 8 below, telescopic arms 5 are arranged on both sides of the boom mounting platform 4, a pair of guides 9 are symmetrically arranged below each telescopic arm 5, and each guide 9 is connected to two lower slings 11.

[0028] The power assembly includes an upper worm gear 15 and a lower worm gear 17. The upper worm gear 15 is located above the lower worm gear 17. An upper capstan 27 is coaxially arranged on one side of the upper worm gear 15 close to the lower worm gear 17. A lower capstan 28 is coaxially arranged on one side of the lower worm gear 17 close to the upper worm gear 15. The diameter of the lower capstan 28 is larger than the diameter of the upper capstan 27. Four upper slings 8 are connected to the lower capstan 28, and several lower slings 11 are connected to the upper capstan 27. Four movable pulleys 7 are rotatably installed above the boom mounting platform 4. One end of each upper sling 8 passes around the movable pulley 7 and is connected to the gantry lifting frame 2. The operator The technician assumes that the lifting device lifts and transports the container and moves the unloading device to the top of the container. The control system controls the auxiliary motor 19 and the main motor 20 to work simultaneously. The auxiliary motor 19 drives the lower worm wheel 17 to rotate through the lower worm 18, and the lower worm wheel 17 drives the lower winch 28 to rotate. The main motor 20 drives the torque wheel 23 to rotate through the flower-shaped transmission wheel 24. The torque wheel 23 drives the upper worm wheel 15 to rotate through the upper worm 16, and the upper worm wheel 15 drives the upper winch 27 to rotate. The upper sling 8 and the lower sling 11 are lowered simultaneously, so that the boom mounting platform 4 and the support device 9 are lowered simultaneously.

[0029] A hydraulic system is arranged inside the boom mounting platform 4, and two telescopic arms 5 are slidably installed in the boom mounting platform 4 through the hydraulic system. A pair of self-locking pins 6 are symmetrically arranged on each telescopic arm 5, and the self-locking pins 6 are slidably connected to the telescopic arm 5. A thrust spring is arranged between the self-locking pins 6 and the telescopic arm 5. A first electromagnet is arranged inside the telescopic arm 5, and the first electromagnet is connected to the control system through a circuit. The first electromagnet attracts the self-locking pin 6, and a slope is arranged on the bottom of one side where the self-locking pin 6 extends out of the telescopic arm 5. A guide hole is opened on each telescopic arm 5, and the lower sling 11 passes through the guide hole and is connected to the guide 9. The guide 9 is provided with an inner right-angle groove, and several magnetic wheels 14 are rotatably installed inside the guide 9, and the outer ring of the magnetic wheel 14 is wrapped with elastic material, and the magnetic wheel 14 extends out of the plane of the inner right-angle groove. A second electromagnet is arranged inside each guide 9, and the second electromagnet is connected to the control system circuit.

[0030] According to the length of the container to be hoisted, the control system controls the hydraulic system in the boom mounting platform 4 to extend the two telescopic arms 5 outward until the self-locking latch 6 is aligned with the hoisting position of the container, the boom mounting platform 4 continues to descend, the self-locking latch 6 contacts the hoisting latch hole of the container, the self-locking latch 6 first retracts into the inside of the telescopic arm 5, and then bounces into the latch hole under the action of the thrust spring, so that the telescopic arm 5 is buckled with the upper part of the container. After the boom mounting platform 4 is partially buckled with the container, the auxiliary motor 19 stops working, and the upper sling 8 Stop lowering, the main motor 20 continues to drive the upper winch 27 to rotate, and the lower sling 11 continues to be lowered downward. When the self-locking pin 6 is buckled into the lifting hole of the container, the inner right-angle grooves of the four supports 9 are also aligned with the four edges of the container. As the lower sling 11 is lowered, the supports 9 descend along the edge of the container, and the magnetic wheels 14 use magnetic attraction to make the supports 9 move along the edge of the container, effectively preventing the supports 9 from shaking during the descent, so that the unloading device can be operated on a shaking platform.

[0031] There are two sliding holes on the supporter 9, and a through groove is provided at the position of the supporter 9 corresponding to the sliding hole. A limiting wheel 12 is rotatably installed in the through groove, and a straight hook 10 is slidably installed in the sliding hole. A spring 13 is connected between the straight hook 10 and the supporter 9. A round hole is provided in the middle of each straight hook 10, and the lower sling 11 passes through the round hole of the straight hook 10. When the supporter 9 moves to the lifting hole at the bottom of the container, the main motor 20 stops working, and the lower sling 11 stops descending. The control system controls the second electromagnet to be energized, and the supporter 9 is adsorbed on the container by strong magnetic force. The main motor 20 starts to reverse. Since the friction between the supporter 9 and the container is large after adsorption, the supporter 9 cannot be pulled to move when the lower sling 11 starts to be wound.

[0032] The power assembly includes an upper worm 16 and a lower worm 18, the upper worm 16 is meshedly connected with the upper worm wheel 15, the lower worm 18 is meshedly connected with the lower worm wheel 17, one end of the upper worm 16 is coaxially connected with a torque wheel 23, one end of the lower worm wheel 17 is coaxially connected with a driven gear 21, an idler gear 22 is arranged on the connecting shaft between the upper worm 16 and the torque wheel 23, the idler gear 22 is meshedly transmitted with the driven gear 21, an auxiliary motor 19 is connected to the side of the driven gear 21 away from the lower worm wheel 17, the auxiliary motor 19 is connected to the control system circuit, a flower-shaped groove is provided on the side of the torque wheel 23 away from the upper worm 16, a flower-shaped transmission wheel 24 is arranged in the flower-shaped groove, and a main motor 20 is connected to the end of the flower-shaped transmission wheel 24 away from the torque wheel 23, as the lower sling 11 is tightened and straightened, the lower sling 11 enables the straight hook 10 to overcome the pulling force of the spring 13 and push outward, and the straight hook 10 extends into the lifting card hole at the bottom of the container , the straight hook 10 holds the bottom of the container. At this time, the top of the container is buckled by the telescopic arm 5, and the bottom of the container is connected by the guide 9. When lifting, the flower-shaped transmission wheel 24 squeezes the inner slider 25, and the inner slider 25 squeezes the torque wheel 23 through the return spring. The torque wheel 23 drives the upper worm 16 to rotate. As the lower sling 11 is tightened, the bearing capacity of the upper capstan 27 increases, and the transmission load of the upper worm 16 increases, until the inner slider 25 is squeezed into the torque wheel 23 by the flower-shaped transmission wheel 24, the inner slider 25 squeezes the connecting slide column 26, and the connecting slide column 26 moves toward the idler gear 22 until the engaging teeth are engaged with the radial grooves, and the torque wheel 23 drives the idler gear 22 to rotate, and the idler gear 22 drives the driven gear 21 to rotate, and the driven gear 21 drives the lower capstan 28 to rotate through the lower worm 18, that is, the lower sling 11 and the upper sling 8 are wound up at the same time to lift the container.

[0033] A plurality of inner sliders 25 are slidably arranged in the torque wheel 23, and the plurality of inner sliders 25 are evenly distributed in a ring shape. A return spring (not shown in the figure) is arranged between each inner slider 25 and the torque wheel 23. A connecting slide post 26 is arranged on one side of the torque wheel 23 corresponding to each inner slider 25. A return spring is also arranged between each connecting slide post 26 and the inside of the torque wheel 23. A slope is arranged on one end of the connecting slide post 26 close to the inner slider 25. A radial groove is arranged on one side of the idler gear 22 close to the torque wheel 23. An insert is arranged on one side of the connecting slide post 26 close to the idler gear 22. The engaging teeth cooperate with the radial slots. During the hoisting stage, the torque wheel 23 is set, and the lower sling 11 is tightened and then linked to the upper sling 8 and tightened at the same time. The container is lifted upward through the upper and lower lifting holes at the same time, so that the lifting force is more uniform. Even if some of the lifting holes of the container are rusted and damaged, the lifting can still be continued, and the lifting process is more stable. The magnetic wheel 14 is used to automatically move and position the support device 9, eliminating the need for manual connection and fixation of the lifting holes below the container, which is more convenient and flexible in a narrow operating space.

[0034] When the container is hoisted to the destination, the second electromagnet is powered off, and the main motor 20 first drives the upper capstan 27 to loosen the lower sling 11, and the straight hook 10 is retracted under the pulling force of the spring 13, and then the upper capstan 27 is used to loosen the lower sling 11 for recovery. Since there is no hanging object on the support device 9 at this time, the transmission load of the upper worm 16 increases less, so the flower-shaped transmission wheel 24 does not need to squeeze the inner slider 25 into the torque wheel 23 to drive the torque wheel 23 to rotate, the interlocking teeth and the radial grooves cannot be engaged together, and the rotation of the lower worm 18 and the rotation of the upper worm 16 will not interfere. After all the support devices 9 are retracted, the control system energizes the first electromagnet to suck the self-locking pin 6 into the telescopic arm 5, and the auxiliary motor 19 drives the lower capstan 28 to rotate through the lower worm 18 to retract the upper sling 8. After the boom mounting platform 4 is lifted, the first electromagnet is powered off, and the self-locking pin 6 pops out and resets.

[0035] The working principle of the present invention is as follows: the operator assumes that the lifting device is lifting and transporting the container, and moves the unloading device to the top of the container. The control system controls the auxiliary motor 19 and the main motor 20 to work simultaneously. The auxiliary motor 19 drives the lower worm wheel 17 to rotate through the lower worm 18, and the lower worm wheel 17 drives the lower winch 28 to rotate. The main motor 20 drives the torque wheel 23 to rotate through the flower-shaped transmission wheel 24. The torque wheel 23 drives the upper worm wheel 15 to rotate through the upper worm 16, and the upper worm wheel 15 drives the upper winch 27 to rotate. The upper sling 8 and the lower sling 11 are lowered simultaneously, so that the boom mounting platform 4 and the support device 9 are lowered simultaneously.

[0036] According to the length of the container to be hoisted, the control system controls the hydraulic system in the boom mounting platform 4 to extend the two telescopic arms 5 outward until the self-locking latch 6 is aligned with the hoisting position of the container, the boom mounting platform 4 continues to descend, the self-locking latch 6 contacts the hoisting latch hole of the container, the self-locking latch 6 first retracts into the inside of the telescopic arm 5, and then bounces into the latch hole under the action of the thrust spring, so that the telescopic arm 5 is buckled with the upper part of the container. After the boom mounting platform 4 is partially buckled with the container, the auxiliary motor 19 stops working, and the upper sling 8 Stop lowering, the main motor 20 continues to drive the upper winch 27 to rotate, and the lower sling 11 continues to be lowered downward. When the self-locking pin 6 is buckled into the lifting hole of the container, the inner right-angle grooves of the four supports 9 are also aligned with the four edges of the container. As the lower sling 11 is lowered, the supports 9 descend along the edge of the container, and the magnetic wheels 14 use magnetic attraction to make the supports 9 move along the edge of the container, effectively preventing the supports 9 from shaking during the descent, so that the unloading device can be operated on a shaking platform.

[0037] When the support 9 moves to the lifting hole at the bottom of the container, the main motor 20 stops working, the lower sling 11 stops descending, the control system controls the second electromagnet to be energized, and the support 9 is adsorbed on the container by strong magnetic force, and the main motor 20 starts to reverse. Since the friction between the support 9 and the container is large after being adsorbed, the lower sling 11 cannot pull the support 9 to move when it starts to reel. As the lower sling 11 is tightened and straightened, the lower sling 11 enables the straight hook 10 to overcome the pulling force of the spring 13 and push outward, and the straight hook 10 extends into the lifting hole at the bottom of the container. The straight hook 10 supports the bottom of the container. At this time, the top of the container is buckled by the telescopic arm 5, and the bottom of the container is connected by the support 9. When lifting, the flower-shaped transmission wheel 24 squeezes the inner slider 25, and the inner slider 25 squeezes the torque wheel 23 through the return spring, and the torque wheel 23 drives the upper worm 16 to rotate. As the lower sling 11 is tightened, the bearing capacity of the upper capstan 27 increases, and the transmission load of the upper worm 16 increases, until the inner slider 25 is squeezed into the torque wheel 23 by the flower-shaped transmission wheel 24, and the inner slider 25 squeezes the connecting slide column 26, and the connecting slide column 26 moves toward the idler gear 22 until the engaging teeth are engaged with the radial grooves, and the torque wheel 23 drives the idler gear 22 to rotate, and the idler gear 22 drives the driven gear 21 to rotate, and the driven gear 21 drives the lower capstan 28 to rotate through the lower worm 18, that is, the lower sling 11 and the upper sling 8 are wound up at the same time to lift the container.

[0038] During the hoisting stage, through the setting of the torque wheel 23, the lower sling 11 is tightened and then linked to the upper sling 8 and tightened at the same time, and the container is lifted upward through the upper and lower hoisting holes at the same time, so that the hoisting force is more uniform, and even if some of the container hoisting holes are rusted and damaged, the hoisting can still be carried out, and the hoisting process is smoother. The magnetic wheel 14 is used to automatically move and position the support device 9, eliminating the need for manual connection and fixation of the hoisting holes below the container, which is more convenient and flexible in a narrow operating space.

[0039] When the container is hoisted to the destination, the second electromagnet is powered off, and the main motor 20 first drives the upper capstan 27 to loosen the lower sling 11, and the straight hook 10 is retracted under the pulling force of the spring 13, and then the upper capstan 27 is used to loosen the lower sling 11 for recovery. Since there is no hanging object on the support device 9 at this time, the transmission load of the upper worm 16 increases less, so the flower-shaped transmission wheel 24 does not need to squeeze the inner slider 25 into the torque wheel 23 to drive the torque wheel 23 to rotate, the interlocking teeth and the radial grooves cannot be engaged together, and the rotation of the lower worm 18 and the rotation of the upper worm 16 will not interfere. After all the support devices 9 are retracted, the control system energizes the first electromagnet to suck the self-locking pin 6 into the telescopic arm 5, and the auxiliary motor 19 drives the lower capstan 28 to rotate through the lower worm 18 to retract the upper sling 8. After the boom mounting platform 4 is lifted, the first electromagnet is powered off, and the self-locking pin 6 pops out and resets.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An electric lifting and unloading device for a container, comprising a vehicle carrier (1) and a gantry lifting frame (2), wherein the gantry lifting frame (2) is mounted on the vehicle carrier (1) via a hydraulic system, and characterized in that: A chassis (3) is arranged above the gantry lifting frame (2), a power assembly is arranged inside the chassis (3), four upper slings (8) and a plurality of lower slings (11) are connected to the power assembly, a boom mounting platform (4) is connected below the gantry lifting frame (2) via a plurality of upper slings (8), telescopic arms (5) are arranged on both sides of the boom mounting platform (4), a pair of guides (9) are symmetrically arranged below each of the telescopic arms (5), and each of the guides (9) is connected to two lower slings (11); The power assembly comprises an upper worm gear (15) and a lower worm gear (17), wherein the upper worm gear (15) is located above the lower worm gear (17), an upper capstan (27) is coaxially arranged on one side of the upper worm gear (15) close to the lower worm gear (17), and a lower capstan (28) is coaxially arranged on one side of the lower worm gear (17) close to the upper worm gear (15), wherein the diameter of the lower capstan (28) is greater than the diameter of the upper capstan (27), four upper slings (8) are connected to the lower capstan (28), and several lower slings (11) are connected to the upper capstan (27), and four movable pulleys (7) are rotatably mounted above the boom mounting platform (4), and one end of each upper sling (8) passes over the movable pulley (7) and is connected to the gantry lifting frame (2).

2. The electric lifting and unloading device for containers according to claim 1, characterized in that: A hydraulic system is provided inside the boom mounting platform (4), and the two telescopic arms (5) are slidably mounted on the boom mounting platform (4) via the hydraulic system. A pair of self-locking latches (6) are symmetrically provided on each telescopic arm (5), and the self-locking latches (6) are slidably connected to the telescopic arm (5). A thrust spring is provided between the self-locking latches (6) and the telescopic arm (5). A first electromagnet is provided inside the telescopic arm (5), and the first electromagnet is connected to a control system via a circuit. The first electromagnet attracts the self-locking latches (6), and a slope is provided at the bottom of one side of the self-locking latches (6) extending out of the telescopic arm (5).

3. The electric lifting and unloading device for containers according to claim 1, characterized in that: Each of the telescopic arms (5) is provided with a guide hole, and the lower sling (11) passes through the guide hole to be connected to the support (9), and the support (9) is provided with an inner right-angle groove. A plurality of magnetic small wheels (14) are rotatably mounted inside the support (9), and the outer ring of the magnetic small wheel (14) is wrapped with elastic material. The magnetic small wheel (14) extends out of the plane of the inner right-angle groove. A second electromagnet is arranged inside each of the support (9), and the second electromagnet is connected to the control system circuit.

4. The electric lifting and unloading device for containers according to claim 3, characterized in that: The support device (9) is provided with two sliding holes, and a through groove is provided at a position of the support device (9) corresponding to the sliding hole, a limiting wheel (12) is rotatably installed in the through groove, a straight hook (10) is slidably installed in the sliding hole, a spring (13) is connected between the straight hook (10) and the support device (9), and a circular hole is provided in the middle of each straight hook (10), and the lower layer sling (11) passes through the circular hole of the straight hook (10).

5. The electric lifting and unloading device for containers according to claim 1, characterized in that: The power assembly comprises an upper worm (16) and a lower worm (18); the upper worm (16) is meshingly connected to an upper worm wheel (15); the lower worm (18) is meshingly connected to a lower worm wheel (17); one end of the upper worm (16) is coaxially connected to a torque wheel (23); one end of the lower worm wheel (17) is coaxially connected to a driven gear (21); an idler gear (22) is provided on a connecting shaft between the upper worm (16) and the torque wheel (23); the idler gear (22) is meshingly connected to the driven gear (21) for transmission.

6. The electric lifting and unloading device for containers according to claim 5, characterized in that: The side of the driven gear (21) away from the lower worm gear (17) is connected to an auxiliary motor (19), and the auxiliary motor (19) is connected to a control system circuit. The side of the torque wheel (23) away from the upper worm gear (16) is provided with a flower-shaped groove, and a flower-shaped transmission wheel (24) is arranged in the flower-shaped groove. The end of the flower-shaped transmission wheel (24) away from the torque wheel (23) is connected to a main motor (20).

7. The electric lifting and unloading device for containers according to claim 6, characterized in that: A plurality of inner sliding blocks (25) are slidably arranged in the torque wheel (23), the plurality of inner sliding blocks (25) are evenly distributed in a ring shape, a return spring is arranged between each inner sliding block (25) and the torque wheel (23), a connecting sliding column (26) is arranged on one side of the torque wheel (23) corresponding to each inner sliding block (25), a return spring is also arranged between each connecting sliding column (26) and the inside of the torque wheel (23), and a slope is arranged at one end of the connecting sliding column (26) close to the inner sliding block (25).

8. The electric lifting and unloading device for containers according to claim 7, characterized in that: A radial slot is provided on a side of the idler gear (22) close to the torque wheel (23), and an engaging tooth is provided on a side of the connecting slide column (26) close to the idler gear (22), wherein the engaging tooth matches the radial slot.

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