A crane device for automatically adjusting the level of a container

Abstract

This invention relates to the field of crane technology, specifically to a lifting device for automatically adjusting the level of a container. It includes a weighing platform with two sets of bases fixedly installed on both sides. A lifting support is fixedly installed on the upper end of each base. A counterweight for stabilizing the structure is provided at the upper end of the lifting support. A slide block is slidably connected to the lifting support, and a container is placed below the slide block for fixing spreaders of different sizes. The lifting device also includes a sway-reducing protection mechanism, a sway-limiting guide mechanism, and an off-center load detection system. If the lifting rope breaks, causing the container to fall along with the spreader, the container's weight is transmitted through the guide column and top plate to the first telescopic airbag. Because the gas inside the airbag can only flow into the second telescopic airbag through a small-flow air duct, the container can be lowered slowly, preventing damage to items inside the container or injury to facilities and personnel. The swing hole of the slide block can prevent rigid damage to the guide column caused by container swing, extending the life of the guide column.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and more particularly to a lifting device that automatically adjusts the level of a container. Background Technology

[0002] As a standardized cargo carrier in sea and rail transport, containers are widely used in the global logistics system. With the development of industries such as new energy and cross-border e-commerce, mixed transport scenarios of containers of various sizes, such as 20-foot small containers and 40-foot large containers, are increasing.

[0003] In railway transportation, the deviation of the container's center of gravity is strictly limited. Insufficient accuracy in detecting off-center loading can easily lead to train swerving when cornering, resulting in cargo damage and disruption of the transport line. Current mainstream lifting devices mostly use single-point weighing, which is insufficient to cover the critical stress points of 20-foot and 40-foot containers, leading to significant errors in center of gravity detection. Furthermore, lifting ropes are prone to breakage due to wear after prolonged use: a break in a single rope can cause the spreader to become horizontally unbalanced, significantly increasing the stress on the remaining ropes and potentially causing a chain reaction of breakages, ultimately resulting in the container falling. A sudden container fall not only damages the contents but can also injure surrounding facilities and personnel, posing a significant safety hazard.

[0004] Therefore, a lifting device that automatically adjusts the level of a container is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a lifting device that automatically adjusts the level of a container, so as to solve the problems of safety hazards and large errors in container weighing mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic container leveling lifting device, comprising a weighing platform, two sets of bases fixedly installed on both sides of the weighing platform, a lifting bracket fixedly installed on the upper end of the two sets of bases, a counterweight block for stabilizing the structure provided on the upper end of the lifting bracket, a slide block slidably connected to the lifting bracket, and a spreader provided below the slide block for fixing containers of different sizes. The lifting device also includes a swing reduction protection mechanism, a swing limiting guidance mechanism, and an off-center load detection system. The swing reduction protection mechanism is located at the upper and lower ends of the slide block to slow down the falling speed of the container below the spreader. The swing limiting guidance mechanism is located above the weighing platform to limit the position of the container and guide the falling position of the container. The off-center load detection system is located at the upper end and left side of the weighing platform to detect the center of gravity of the container.

[0007] The sway reduction and protection mechanism includes a guide column fixedly installed on the upper end of the lifting device. The upper end of the guide column passes through the swing hole and is fixedly connected to the top plate. A first telescopic airbag and a second telescopic airbag are sleeved on the outside of the guide column. One end of the first telescopic airbag is connected to an air duct, and the other end of the air duct passes through the guide column and is connected to the second telescopic airbag.

[0008] The swing-limiting guide mechanism includes a frame fixedly installed on the lifting support. Several sets of symmetrical first guide rods are fixedly connected to the side of the frame. Several sets of first guide rods are fixedly connected to baffles. A first guard plate is sleeved on both sets of first guide rods. A second damping spring is provided between the frame and the first guard plate. The second damping spring is sleeved on the first guide rod.

[0009] The off-center load detection system includes an operating platform set on the upper part of the base, a large screen display set on the upper part of the operating platform, and a weight sensor electrically connected to the large screen display. The weight sensor is set on the upper part of the weighing platform.

[0010] Preferably, a servo motor is fixedly installed on the upper end of the slide, and the output shaft of the servo motor is fixedly connected to a chuck. The chuck is locked onto the guide rail, and the guide rail is fixedly installed on the lifting bracket.

[0011] Preferably, the upper end of the lifting device is fixedly connected to one end of four sets of lifting ropes, the other end of the lifting ropes passes through the slide and is connected inside the jack, and the jack is fixedly installed on the upper end of the slide.

[0012] Preferably, the first telescopic airbag and the second telescopic airbag are respectively disposed at the upper and lower ends of the slide block. The ends of the first telescopic airbag and the second telescopic airbag near the slide block are fixedly connected to a limiting plate. Several sets of balls are rotatably connected to the limiting plate, and the balls are in point contact with the slide block.

[0013] Preferably, the slide has a swing hole, the inner diameter of which is larger than the diameter of the guide post.

[0014] Preferably, the slide has several sets of mounting cavities. A first damping spring and a movable plate are movably connected inside the mounting cavities. A contact block is fixedly connected to the side of the movable plate. The outer end of the contact block is inserted into the swing hole, and the end face of the outer end of the contact block contacts the outer arc surface of the guide post.

[0015] Preferably, the first guard plate has a strip-shaped hole, and a second guard plate is slidably connected to the strip-shaped hole. A retaining plate is fixedly connected to the bottom end of the second guard plate, and a retaining plate groove is provided at the top end of the second guard plate. The retaining plate at the bottom end of the second guard plate can be slidably connected to the retaining plate groove at the top end of another set of second guard plates.

[0016] Preferably, the rear end of the second guard plate has a through-hole and a slider is fixedly connected thereto. The slider is sleeved on the second guide rod. Both ends of the second guide rod are fixedly connected to vertical plates. The vertical plates are fixedly installed on the first guard plate. A third damping spring is provided between the slider and the vertical plates. The second guide rod is sleeved on the third damping spring.

[0017] Preferably, the large screen display is electrically connected to a deviation measuring processor, which is fixedly installed on the operating table. Six sets of weight sensors are set to correspond to the four right-angle bends of the two sizes of containers.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention, through the design of a sway-reducing and protective mechanism, ensures that when the lifting rope breaks and the container and spreader fall, the container's weight is transmitted through the guide column and top plate to the first telescopic airbag. Because the gas inside the airbag can only flow into the second telescopic airbag through a small-flow air duct, the container can be lowered slowly, preventing damage to items inside the container or injury to facilities and personnel. The swing hole of the slide block can avoid rigid damage to the guide column caused by the container's swing, extending the life of the guide column. The limiting plate can solve the problem of uneven force on the first and second telescopic airbags caused by the swing hole, helping the airbags to work stably. Moreover, the ball on the limiting plate converts the sliding friction between the container and the slide block into rolling friction, greatly reducing wear and improving the stability of the device. When the container is lifted and swings, the guide column drives the movable plate to compress the first damping spring in the mounting cavity. The spring's reaction force forms a central restriction on the guide column through the contact block, helping the container quickly return to horizontal balance and further ensuring lifting safety.

[0020] 2. This invention, through the design of a swing-limiting guide mechanism, utilizes the function of several sets of first guard plates and several sets of second guard plates that are linked from above to below to provide a large reaction force for the container in the initial stage, quickly absorb the lateral kinetic energy of the container, establish a stable falling trajectory, and utilize the function of several sets of first guard plates and several sets of second guard plates that are not linked from above to below to gradually reduce the rebound force when the container separates from the first and second guard plates, so that the container can fall in equilibrium by inertia, which facilitates accurate weighing of the container.

[0021] 3. This invention designs an off-center load detection system to detect off-center loads of two types of containers, 40-foot large containers and 20-foot small containers, in real time, obtain the center of gravity data of the containers, and integrate various data through a large screen display to achieve scientific loading and avoid the occurrence of off-center loading accidents. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional schematic diagram of an automatic container leveling lifting device according to an embodiment of the present invention;

[0024] Figure 2 This is a three-dimensional schematic diagram of an off-center load detection system for an automatic container leveling lifting device according to an embodiment of the present invention;

[0025] Figure 3 This is a three-dimensional schematic diagram of the anti-sway protection mechanism of a lifting device for automatically adjusting the level of a container according to an embodiment of the present invention;

[0026] Figure 4 This is a top view schematic diagram of the swing-limiting guide mechanism of a lifting device for automatically adjusting the level of a container according to an embodiment of the present invention;

[0027] Figure 5 This invention relates to an automatic container leveling lifting device. Figure 4 Schematic diagram of cross-section at point AA;

[0028] Figure 6 This invention relates to an automatic container leveling lifting device. Figure 5 Enlarged view of point B in the middle;

[0029] Figure 7 This is a three-dimensional schematic diagram of the swing-limiting guide mechanism of a lifting device for automatically adjusting the level of a container according to an embodiment of the present invention;

[0030] Figure 8 This is a partial three-dimensional schematic diagram of the swing-limiting guide mechanism of a lifting device for automatically adjusting the level of a container according to an embodiment of the present invention;

[0031] Figure 9 This invention relates to an automatic container leveling lifting device. Figure 8 Enlarged diagram of point C in the middle.

[0032] The following are labeled in the diagram: 1. Weighing platform; 11. Base; 12. Lifting bracket; 13. Counterweight; 14. Slide; 141. Servo motor; 142. Roller wheel; 143. Guide rail; 15. Lifting device; 151. Lifting rope; 152. Lifting device; 16. Container;

[0033] 2. Anti-sway protection mechanism; 21. Guide column; 211. Top plate; 22. Swing hole; 23. First telescopic airbag; 24. Air duct; 25. Second telescopic airbag; 26. Limiting plate; 261. Sphere; 27. Housing cavity; 28. First damping spring; 29. ​​Movable plate; 291. Contact block;

[0034] 3. Limiting swing guide mechanism; 31. Upright frame; 311. First guide rod; 312. Baffle; 32. Second damping spring; 33. First guard plate; 331. Strip hole; 34. Second guard plate; 341. Clamping plate; 342. Clamping plate groove; 343. Sliding block; 35. Upright plate; 36. Second guide rod; 37. Third damping spring;

[0035] 4. Off-center load detection system; 41. Control panel; 42. Large screen display; 43. Weight sensor; 44. Off-center load processor. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0037] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] Please see Figures 1 to 9The present invention provides a technical solution: an automatic container leveling lifting device, including a weighing platform 1, two sets of bases 11 fixedly installed on both sides of the weighing platform 1, a lifting bracket 12 fixedly installed on the upper end of the two sets of bases 11, a counterweight block 13 for stabilizing the structure provided on the upper end of the lifting bracket 12, a slide block 14 slidably connected on the lifting bracket 12, and a spreader 15 provided below the slide block 14 for fixing containers 16 of different sizes. The lifting device also includes a swing reduction protection mechanism 2, a swing limiting guide mechanism 3, and an off-center load detection system 4. The swing reduction protection mechanism 2 is provided at the upper and lower ends of the slide block 14 to slow down the falling speed of the container 16 below the spreader 15. The swing limiting guide mechanism 3 is provided above the weighing platform 1 to limit the position of the container 16 and guide the falling position of the container 16. The off-center load detection system 4 is provided at the upper end and left side of the weighing platform 1 to detect the center of gravity of the container 16.

[0039] A servo motor 141 is fixedly installed on the upper end of the slide block 14. The output shaft of the servo motor 141 is fixedly connected to a cam 142. The cam 142 is locked on the guide rail 143. The guide rail 143 is fixedly installed on the lifting bracket 12.

[0040] The upper end of the lifting device 15 is fixedly connected to one end of four sets of lifting ropes 151. The other end of the lifting ropes 151 passes through the slide 14 and is connected inside the lifting device 152. The lifting device 152 is fixedly installed on the upper end of the slide 14.

[0041] By adopting the above technical solution, firstly, the spreader 15 grabs the container 16, which has two sizes: a 40-foot large container and a 20-foot small container. Then, the crane 152 is started, and the crane 152 lifts the container 16 from the bottom of the spreader 15 using four sets of lifting ropes 151. Finally, the servo motor 141 is started, and the servo motor 141 drives the roller 142 to roll on the guide rail 143, so that the slide 14 moves horizontally on the lifting bracket 12, thereby moving the container 16 above the weighing platform 1. Then, the crane 152 is started again, and the crane 152 releases the container 16 onto the weighing platform 1 using the lifting ropes 151 for off-center load detection.

[0042] As one embodiment of the present invention, such as Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the anti-sway protection mechanism 2 includes a guide post 21 fixedly installed on the upper end of the lifting device 15. The upper end of the guide post 21 passes through the swing hole 22 and is fixedly connected to a top plate 211. A first telescopic airbag 23 and a second telescopic airbag 25 are sleeved on the outer side of the guide post 21. One end of the first telescopic airbag 23 is connected to an air duct 24, and the other end of the air duct 24 passes through the guide post 21 and connects to the second telescopic airbag 25. The first telescopic airbag 23 and the second telescopic airbag 25 are respectively located at the upper and lower ends of the slide block 14. The first telescopic airbag 23 and the second telescopic airbag 25 are close to the slide block 14. A limiting plate 26 is fixedly connected to the end, and several sets of balls 261 are rotatably connected to the limiting plate 26. The balls 261 are in point contact with the slide block 14. The slide block 14 is provided with a swing hole 22. The inner diameter of the swing hole 22 is larger than the diameter of the guide post 21. Several sets of mounting cavities 27 are provided inside the slide block 14. A first damping spring 28 and a movable plate 29 are movably connected inside the mounting cavity 27. A contact block 291 is fixedly connected to the side of the movable plate 29. The outer end of the contact block 291 is inserted into the swing hole 22, and the end face of the outer end of the contact block 291 is in contact with the outer arc surface of the guide post 21.

[0043] By adopting the above technical solution, the lifting rope 151 is prone to breakage due to long-term wear, causing the spreader 15 to be in a horizontally unbalanced state. The unbalanced spreader 15 greatly increases the force on other lifting ropes 151, which is prone to continuous breakage, causing the container 16 to fall. The sudden fall of the container 16 can not only easily damage the contents inside, but also easily hit nearby facilities and personnel, posing a significant hazard. When the lifting rope 151 loses its function, the container 16 pulls the spreader 15 down. At this time, the weight of the container 16 drives the top plate 211 through the guide column 21 to compress the first telescopic airbag 23. Because the gas in the first telescopic airbag 23 can only flow into the second telescopic airbag 25 through the small-volume air duct 24, the container 16 can only descend slowly, thus achieving a soft landing. Then, because the lifted container 16 will swing, it is easy to cause rigid damage to the guide column 21. Therefore, in the slide 1 A swing hole 22 is provided on the guide post 21 to avoid rigid damage and improve its service life. The swing hole 22 can easily cause uneven force on one end of the first telescopic airbag 23 and the second telescopic airbag 25. Therefore, a limit plate 26 is provided to facilitate the first telescopic airbag 23 and the second telescopic airbag 25 to use force. The limit plate 26 is prone to wear after sliding on the slide block 14 for a long time. The ball 261 can effectively reduce the wear of the limit plate 26 and improve the stability of the device. Finally, because the container 16 is prone to swinging when it is lifted by the lifting rope 151, when the container 16 swings the guide post 21 through the spreader 15, the first damping spring 28 in the mounting cavity 27 will be subjected to the swing force. The first damping spring 28 provides a reaction force to the abutment block 291 through the movable plate 29, so that several sets of abutment blocks 291 can center and limit the guide post 21, so that the container 16 can quickly reach horizontal balance.

[0044] As one embodiment of the present invention, such as Figure 7 , Figure 8 and Figure 9As shown, the swing-limiting guide mechanism 3 includes a frame 31 fixedly mounted on the lifting support 12. Several sets of symmetrical first guide rods 311 are fixedly connected to the side of the frame 31. Each set of first guide rods 311 is fixedly connected to a baffle 312. A first protective plate 33 is sleeved on both sets of first guide rods 311. A second damping spring 32 is provided between the frame 31 and the first protective plate 33, and the second damping spring 32 is sleeved on the first guide rods 311. A strip-shaped hole 331 is opened on the first protective plate 33, and a second protective plate 34 is slidably connected to the strip-shaped hole 331. The bottom end of the second protective plate 34 is fixedly connected to... The upper end of the second guard plate 34 has a card slot 342. The card 341 at the bottom of the second guard plate 34 can be slidably connected to the card slot 342 at the upper end of another set of second guard plates 34. The rear end of the second guard plate 34 has a through-hole 331 and a slider 343 is fixedly connected to it. The slider 343 is sleeved on the second guide rod 36. Both ends of the second guide rod 36 are fixedly connected to the upright plate 35. The upright plate 35 is fixedly installed on the first guard plate 33. A third damping spring 37 is provided between the slider 343 and the upright plate 35. The third damping spring 37 is sleeved on the second guide rod 36.

[0045] By adopting the above technical solution, when the container 16 moves above the weighing platform 1, the first guard plate 33 on the upper part of the upright 31 first contacts the container 16. Because the upper first guard plate 33 can cause the lower first guard plate 33 to retract through the clamping plate 341, several sets of second damping springs 32 simultaneously provide lateral reaction forces to multiple sets of first guard plates 33, so that the inertia of the container 16 can be reduced quickly. Similarly, the upper second guard plate 34 can cause the lower second guard plate 34 to retract through the clamping plate 341, and several sets of third damping springs 37 simultaneously provide front and rear reaction forces to multiple sets of second guard plates 34, thereby quickly reducing the swing amplitude of the container 16. As the container 16 falls, the container 16 will detach from the upper first guard plate 33 and the second guard plate 34. And because the lower first guard plate 33 Since the second guard plate 34 cannot cause the upper first guard plate 33 and second guard plate 34 to retract, the reaction force applied by multiple sets of first guard plates 33 and second guard plates 34 will gradually decrease, thereby releasing the inertia of container 16 and enabling the first guard plate 33 and second guard plate 34 to separate smoothly from container 16. This is beneficial to utilize the function of several sets of first guard plates 33 and several sets of second guard plates 34 to link the upper and lower parts, providing a larger reaction force for container 16 in the initial stage, quickly absorbing the lateral kinetic energy of container 16, establishing a stable falling trajectory, and utilizing the function of several sets of first guard plates 33 and several sets of second guard plates 34 not linking the upper and lower parts, gradually reducing the rebound force when container 16 separates from the first guard plate 33 and second guard plate 34, so that container 16 can fall in balance by inertia, which is convenient for accurate weighing of container 16.

[0046] As one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the off-center load detection system 4 includes an operating platform 41 set on the upper end of the base 11. A large screen display 42 is set on the upper end of the operating platform 41. The large screen display 42 is electrically connected to a weight sensor 43. The weight sensor 43 is set on the upper end of the weighing platform 1. The large screen display 42 is electrically connected to an off-center measurement processor 44. The off-center measurement processor 44 is fixedly installed on the operating platform 41. There are six sets of weight sensors 43, which are used to correspond to the four right-angle bends of the two sizes of containers 16.

[0047] By adopting the above technical solution, the container 16 loaded onto the train needs to undergo off-center loading detection to meet the railway's loading safety regulations. This prevents the container 16 from exceeding the off-center loading limit after loading. If the train is overloaded, it is easy for the cargo to cause a train to swerve when crossing the railway track. During use, the weight sensor 43 obtains the data of the container 16 and transmits the signal to the off-center detection processor 44. After specific program analysis, the center of gravity of the container 16 is accurately marked, and the data is simultaneously transmitted to the large screen display 42 on the control panel 41 for customers to view intuitively. At the same time, the data is also backed up to the production system of the background computer. Customers can view the detection results at any time on their mobile phones or computers through our client. This is conducive to real-time off-center loading detection of both 40-foot and 20-foot containers 16, obtaining the center of gravity data of the container 16, and integrating various data through the large screen display 42 to achieve scientific loading and avoid train swerving accidents.

[0048] Working principle: When the lifting rope 151 loses its function, the container 16, along with the spreader 15, falls. At this time, the weight of the container 16, through the guide column 21, causes the top plate 211 to compress the first telescopic airbag 23. Because the gas in the first telescopic airbag 23 can only flow into the second telescopic airbag 25 through the relatively small flow rate air pipe 24, the container 16 can only descend slowly, thus achieving a soft landing. However, because the lifted container 16 will swing, which could easily cause rigid damage to the guide column 21, a swing hole 22 is provided on the slide block 14 to avoid rigid damage to the guide column 21, improve its service life, and prevent the first telescopic airbag 23 and the second telescopic airbag 25 from swaying. Because the force is uneven at the ends, a limiting plate 26 is provided to facilitate the first telescopic airbag 23 and the second telescopic airbag 25 to take advantage of each other. The limiting plate 26 is prone to wear after sliding on the slide block 14 for a long time. The ball 261 can effectively reduce the wear of the limiting plate 26 and improve the stability of the device. Finally, because the container 16 is prone to swinging when it is lifted by the lifting rope 151, when the container 16 swings the guide column 21 driven by the spreader 15, the first damping spring 28 in the mounting cavity 27 will be subjected to the swinging force, so that the first damping spring 28 provides a reaction force to the abutment block 291 through the movable plate 29, so that several sets of abutment blocks 291 can center and limit the guide column 21, so that the container 16 can quickly reach horizontal balance.

[0049] When container 16 moves above weighing platform 1, the first guard plate 33 on the upper part of the upright 31 first contacts container 16. Because the upper first guard plate 33 can retract the lower first guard plate 33 through the clamping plate 341, several sets of second damping springs 32 simultaneously provide lateral reaction force to multiple sets of first guard plates 33, allowing the inertia of container 16 to decrease rapidly. Similarly, the upper second guard plate 34 can retract the lower second guard plate 34 through the clamping plate 341, and several sets of third damping springs 37 simultaneously provide lateral reaction force to multiple sets of second guard plates 33. 34 provides reaction force in the front and rear directions, thereby quickly reducing the swing amplitude of container 16. As container 16 falls, container 16 will detach from the upper first guard plate 33 and second guard plate 34. Since the lower first guard plate 33 and second guard plate 34 cannot drive the upper first guard plate 33 and second guard plate 34 to retract, the reaction force applied by multiple sets of first guard plate 33 and second guard plate 34 will gradually decrease, thereby releasing the inertia of container 16 and enabling the first guard plate 33 and second guard plate 34 to separate smoothly from container 16.

[0050] Container 16 loaded onto a train needs to undergo off-center loading detection to meet railway loading safety regulations and prevent excessive off-center loading after loading. If the train is overloaded, it is prone to swerving accidents due to the cargo when crossing the railway tracks. During operation, the weight sensor 43 obtains data from container 16 and transmits the signal to the off-center detection processor 44. After specific program analysis, the center of gravity of container 16 is accurately marked, and the data is simultaneously transmitted to the large screen display 42 on the control panel 41 for customers to view intuitively. At the same time, the data is also backed up to the production system on the back-end computer. Customers can view the detection results at any time on their mobile phones or computers through our client.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting device for automatically adjusting the level of a container, comprising a weighing platform (1), two sets of bases (11) fixedly installed on both sides of the weighing platform (1), a lifting bracket (12) fixedly installed on the upper end of the two sets of bases (11), a counterweight (13) for stabilizing the structure provided on the upper end of the lifting bracket (12), a slide (14) slidably connected on the lifting bracket (12), and a lifting device (15) provided below the slide (14) for fixing containers (16) of different sizes, characterized in that: The lifting device also includes a swing reduction protection mechanism (2), a swing limiting guide mechanism (3), and an off-center load detection system (4). The swing reduction protection mechanism (2) is located at the upper and lower ends of the slide (14) to slow down the falling speed of the container (16) below the spreader (15). The swing limiting guide mechanism (3) is located above the weighing platform (1) to limit the position of the container (16) and guide the falling position of the container (16). The off-center load detection system (4) is located at the upper end and left side of the weighing platform (1) to detect the center of gravity of the container (16). The swing protection mechanism (2) includes a guide post (21) fixedly installed on the upper end of the lifting device (15). The upper end of the guide post (21) passes through the swing hole (22) and is fixedly connected to the top plate (211). A first telescopic airbag (23) and a second telescopic airbag (25) are sleeved on the outside of the guide post (21). The first telescopic airbag (23) is connected to one end of the air guide tube (24), and the other end of the air guide tube (24) passes through the guide post (21) and is connected to the second telescopic airbag (25). The swing-limiting guide mechanism (3) includes a frame (31) fixedly installed on the lifting support (12). Several sets of symmetrical first guide rods (311) are fixedly connected to the side of the frame (31). Several sets of first guide rods (311) are fixedly connected to baffles (312). A first guard plate (33) is sleeved on both sets of first guide rods (311). A second damping spring (32) is provided between the frame (31) and the first guard plate (33). The second damping spring (32) is sleeved on the first guide rod (311). The off-center load detection system (4) includes an operating table (41) set on the upper end of the base (11), a large screen display (42) is set on the upper end of the operating table (41), the large screen display (42) is electrically connected to a weight sensor (43), and the weight sensor (43) is set on the upper end of the weighing platform (1).

2. The lifting device for automatically adjusting the level of a container according to claim 1, characterized in that, A servo motor (141) is fixedly installed on the upper end of the slide (14). The output shaft of the servo motor (141) is fixedly connected to a chuck (142). The chuck (142) is mounted on a guide rail (143). The guide rail (143) is fixedly installed on the lifting bracket (12).

3. The lifting device for automatically adjusting the level of a container according to claim 1, characterized in that, The upper end of the lifting device (15) is fixedly connected to one end of four sets of lifting ropes (151), and the other end of the lifting ropes (151) passes through the slide (14) and is connected inside the lifting device (152). The lifting device (152) is fixedly installed on the upper end of the slide (14).

4. The lifting device for automatically adjusting the level of a container according to claim 1, characterized in that, The first telescopic airbag (23) and the second telescopic airbag (25) are respectively disposed at the upper and lower ends of the slide (14). The ends of the first telescopic airbag (23) and the second telescopic airbag (25) near the slide (14) are fixedly connected to a limiting plate (26). Several sets of balls (261) are rotatably connected on the limiting plate (26). The balls (261) are in point contact with the slide (14).

5. The lifting device for automatically adjusting the level of a container according to claim 1, characterized in that, The slide (14) is provided with a swing hole (22), the inner diameter of which is larger than the diameter of the guide post (21).

6. The lifting device for automatically adjusting the level of a container according to claim 1, characterized in that, The slide (14) has several sets of mounting cavities (27). The mounting cavity (27) is movably connected to a first damping spring (28) and a movable plate (29). The side of the movable plate (29) is fixedly connected to an abutment block (291). The outer end of the abutment block (291) is inserted into the swing hole (22), and the end face of the outer end of the abutment block (291) contacts the outer arc surface of the guide post (21).

7. The lifting device for automatically adjusting the level of a container according to claim 1, characterized in that, The first guard plate (33) has a strip hole (331) and a second guard plate (34) is slidably connected to the strip hole (331). A clamping plate (341) is fixedly connected to the bottom end of the second guard plate (34). A clamping plate groove (342) is provided at the upper end of the second guard plate (34). The clamping plate (341) at the bottom end of the second guard plate (34) can be slidably connected to the clamping plate groove (342) at the upper end of another set of second guard plates (34).

8. The lifting device for automatically adjusting the level of a container according to claim 7, characterized in that, The rear end of the second guard plate (34) passes through the strip hole (331) and is fixedly connected to a slider (343). The slider (343) is sleeved on the second guide rod (36). Both ends of the second guide rod (36) are fixedly connected to a vertical plate (35). The vertical plate (35) is fixedly installed on the first guard plate (33). A third damping spring (37) is provided between the slider (343) and the vertical plate (35). The third damping spring (37) is sleeved on the second guide rod (36).

9. The lifting device for automatically adjusting the level of a container according to claim 1, characterized in that, The large screen display (42) is electrically connected to a deviation measuring processor (44), which is fixedly installed on the operating table (41). The weight sensor (43) is provided in six sets to correspond to the four right-angle corners of the two sizes of containers (16).

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