A hoisting device for containers with self-balancing function

Abstract

This invention relates to the field of container lifting technology, specifically to a container lifting device with a self-balancing function. The device includes a frame, crossbeams fixedly installed at both ends of the frame, and a connecting seat at the top of the frame. Each of the two crossbeams has a drive mechanism inside, and each end of the two crossbeams has a locking mechanism and two monitoring mechanisms. Each monitoring mechanism has a wedge block on one side, and each wedge block has a first displacement mechanism and a second displacement mechanism. The beneficial effect of this invention is that it replaces the existing technology that only uses a single locking pin to contact the corner piece, avoiding the situation where the locking head continues to work without entering the locking hole when the corner piece is damaged by impact, thus preventing false locking and falling accidents during subsequent lifting. The invention also allows direct connection between the port container crane remote control system and the lifting device, enabling remote command control of the lifting device to complete container lifting, transfer, and lowering operations.

Description

Technical Field

[0001] This invention relates to the field of container lifting technology, specifically to a container lifting device with a self-balancing function. Background Technology

[0002] Container lifting is primarily carried out using spreader equipment. The spreader is placed on the container, and the four locking lugs at the bottom of the spreader are aligned with the corner fittings at the four corners of the container. The four lugs are then inserted into the corner fittings. Steel cables are connected via lifting rings at the four corners of the spreader, and finally, shackles and a crane are connected to perform the lifting operation. Alternatively, a remote control system for the port container crane can be directly integrated with the lifting device, allowing remote command control to complete the lifting, transfer, and lowering of containers.

[0003] Chinese invention patent application CN201610986973.6 discloses a container spreader with a novel twistlock mechanism. It employs twistlock status detection to monitor the twistlock's operating status, which, in conjunction with the container pin detection, avoids safety issues caused by twistlock status disorder and improves overall machine safety. It also uses a rotary mechanical locking device to achieve mechanical positioning of the twistlock mechanism, avoiding safety issues caused by electrical system failure and improving overall machine safety.

[0004] However, in this patent application, only one container pin is set on one side of each twistlock shaft. When the spreader descends, each container pin can only touch one end of the corresponding container corner fitting. A single container pin can only determine whether it is in contact with the corner fitting, but cannot determine whether the top surface of the corner fitting is horizontal. When the corner fitting is damaged by impact, its top surface is not horizontal. The system is still allowed to work after the container pin touches the corner fitting. The twistlock shaft may not enter the locking hole in the corner fitting. When the spreader lifts, it is very easy to cause false locking and falling accidents. Summary of the Invention

[0005] The purpose of this invention is to provide a container lifting device with a self-balancing function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a container lifting device with self-balancing function, comprising a frame, crossbeams fixedly installed at both ends of the frame, and a connecting seat set at the top of the frame. A driving mechanism is provided inside each of the two crossbeams. A locking mechanism and two monitoring mechanisms are provided at both ends of each of the two crossbeams. Each locking mechanism is located between two adjacent monitoring mechanisms. A wedge block is provided on one side of each monitoring mechanism. A first displacement mechanism and a second displacement mechanism are provided in each wedge block. A lower pressure frame is provided above every two adjacent wedge blocks. Guide rods are slidably provided at both ends of multiple lower pressure frames. Multiple guide rods are respectively fixedly installed inside their respective corresponding crossbeams. A placement groove is provided at one end of each of the multiple lower pressure frames.

[0007] Preferably, both ends of the frame are fixedly installed with sliding rods, the two ends of the bottom of the connecting seat are slidably sleeved on the outside of the two sliding rods, and a cylinder is fixedly installed on the top of the frame, with the telescopic shaft end of the cylinder fixedly connected to the connecting seat.

[0008] Preferably, the driving mechanism includes a drive motor, which is fixedly installed on the top of the crossbeam. A support plate is fixedly installed on the output shaft end of the drive motor. Connecting shafts are fixedly installed at both ends of the bottom of the support plate. Transmission arms are slidably sleeved on the outside of the two connecting shafts. A connecting hole is opened at the end of each transmission arm away from the drive motor. A telescopic rod is rotatably installed on the top of the end of each transmission arm away from the drive motor. A rotating plate is rotatably installed on the top of each of the two telescopic rods. The tops of the two rotating plates are rotatably connected to the inside of the crossbeam. The two transmission arms are respectively set inside their respective placement slots.

[0009] Preferably, the locking mechanism includes a fixed sleeve, which is fixedly installed at the bottom end of the crossbeam. A lock head is rotatably installed inside the fixed sleeve. A connecting plate is fixedly installed on the outside of the top of the lock head. A connecting shaft II is fixedly installed at one end of the top of the connecting plate. The connecting shaft II cooperates with a corresponding connecting hole I. A connecting hole II is opened at one end of the connecting plate. A connecting shaft III is sleeved inside the connecting hole II. The connecting shaft III is fixedly connected to a corresponding lower pressure frame.

[0010] Preferably, the monitoring mechanism includes a retaining pin and a sensor. The retaining pin is slidably connected to the crossbeam. A spring is sleeved on the outside of the retaining pin. The sensor is fixedly installed inside the crossbeam. The top of the retaining pin cooperates with the sensor and a corresponding wedge block.

[0011] Preferably, the first displacement mechanism includes two guide rods and a U-shaped bracket. The two guide rods are fixedly installed inside the crossbeam and slidably installed at both ends of the corresponding wedge blocks. Springs are sleeved on the outside of the two guide rods. The U-shaped bracket is sleeved on the end of the corresponding lower pressure frame. Two guide rods are slidably sleeved on one end of the U-shaped bracket. The two guide rods are fixedly connected to the crossbeam. A flipping rod is rotatably installed at the bottom of the U-shaped bracket. The bottom end of the flipping rod is rotatably connected to the corresponding wedge block.

[0012] Preferably, the second displacement mechanism includes a sliding seat and a fixed shaft. The sliding seat is slidably mounted on the top of the corresponding wedge block. A spring three is fixedly mounted between one side of the sliding seat and the inner wall of the wedge block. A flipping rod two is rotatably mounted on the top of the sliding seat. The top end of the flipping rod two is rotatably connected to a corresponding flipping rod one. A top rod is rotatably mounted on the end of the sliding seat away from the spring three. A strip groove is opened inside the top rod. The fixed shaft is fixedly mounted inside the crossbeam and is located inside the strip groove.

[0013] Preferably, each of the wedge-shaped blocks has a T-shaped limiting groove on its top, and the multiple sliding seats are slidably installed inside their respective T-shaped limiting grooves.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By setting two monitoring mechanisms on both sides of each lock head, the two ends of the top of the same corner piece are monitored by two adjacent container pins to determine whether the top surface of the corner piece is horizontal. This replaces the existing technology that only uses a single container pin to contact the corner piece. It avoids the situation where the lock head is still working and does not enter the lock hole when the corner piece is damaged by impact, which would cause false locking and falling accidents during subsequent lifting. After the four lock heads are connected to the four corner pieces respectively, the remote control system of the port container crane is directly connected to the lifting device. The lifting device is controlled by remote commands to complete the lifting, transfer and lowering of containers.

[0016] When the travel distances of the two locking pins corresponding to the same corner piece are inconsistent, it indicates that the top of the corner piece is not horizontal. In this case, to avoid false locking or direct hard contact between the lock head and the corner piece, it is not necessary to activate the drive mechanism. Instead, the staff should inspect the corner piece and take appropriate measures, such as repairing the corner piece, to ensure that the lock head and the key hole are accurately aligned. With the cooperation of the corresponding first and second displacement mechanisms, even if the drive mechanism is accidentally activated, the transmission arm will not connect with the lock head, thus preventing the lock head from being damaged due to direct hard contact with the corner piece. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of one end of the crossbeam of the present invention;

[0019] Figure 3 This is a partial three-dimensional structural diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the bottom structure of the transmission arm of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of one end of the transmission arm of the present invention;

[0022] Figure 6 This is a schematic diagram of the monitoring mechanism structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the combination of the lower pressure frame, the first limiting mechanism, and the second limiting mechanism of the present invention;

[0024] Figure 8 This is a schematic diagram of the lower pressure frame and locking mechanism of the present invention;

[0025] Figure 9 This is a schematic diagram of the combination of the first limiting mechanism and the second limiting mechanism of the present invention;

[0026] Figure 10 This is a schematic diagram of the first limiting structure of the present invention;

[0027] Figure 11 This is a schematic diagram of the second limiting structure of the present invention.

[0028] The components represented by each number in the attached diagram are listed below: 1. Frame; 2. Crossbeam; 3. Connecting seat; 4. Slide rod; 5. Cylinder; 6. Drive motor; 7. Support plate; 8. Connecting shaft one; 9. Transmission arm; 10. Connecting hole one; 11. Telescopic rod; 12. Rotating plate; 13. Fixing sleeve; 14. Lock head; 15. Connecting plate; 16. Connecting shaft two; 17. Connecting hole two; 18. Connecting shaft three; 19. Engagement pin; 20. Spring one; 21. Sensor; 22. Wedge block; 23. Guide rod two; 24. Spring two; 25. U-shaped bracket; 26. Guide rod three; 27. Flipping rod one; 28. Sliding seat; 29. ​​Spring three; 30. Flipping rod two; 31. Top rod; 32. Strip groove; 33. Fixing shaft; 34. T-shaped limiting slide groove; 35. Lower pressure frame; 36. Guide rod one; 37. Placement groove. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention provides a technical solution: such as Figure 1 - Figure 11 The container lifting device with self-balancing function shown includes a frame 1, crossbeams 2 fixedly installed at both ends of the frame 1, and a connecting seat 3 set at the top of the frame 1. The two crossbeams 2 are equipped with a drive mechanism inside each other. The two ends of the two crossbeams 2 are equipped with a locking mechanism and two monitoring mechanisms. Each locking mechanism is set between two adjacent monitoring mechanisms. Each monitoring mechanism is equipped with a wedge block 22 on one side. Each wedge block 22 is equipped with a first displacement mechanism and a second displacement mechanism. A pressure frame 35 is set above every two adjacent wedge blocks 22. Guide rods 36 are slidably installed at both ends of multiple pressure frames 35. Multiple guide rods 36 are fixedly installed inside their respective crossbeams 2. A placement groove 37 is opened at one end of each of the multiple pressure frames 35.

[0031] Both ends of the frame 1 are fixedly installed with slide rods 4. The two ends of the bottom of the connecting seat 3 are slidably sleeved on the outside of the two slide rods 4. The top of the frame 1 is fixedly installed with a cylinder 5. The telescopic shaft end of the cylinder 5 is fixedly connected to the connecting seat 3.

[0032] The drive mechanism includes a drive motor 6, which is fixedly mounted on the top of the crossbeam 2. A support plate 7 is fixedly mounted on the output shaft end of the drive motor 6. Connecting shafts 8 are fixedly mounted on both ends of the bottom of the support plate 7. Transmission arms 9 are slidably sleeved on the outside of the two connecting shafts 8. A connecting hole 10 is opened at the end of the two transmission arms 9 away from the drive motor 6. A telescopic rod 11 is rotatably mounted on the top of the end of the two transmission arms 9 away from the drive motor 6. A rotating plate 12 is rotatably mounted on the top of the two telescopic rods 11. The tops of the two rotating plates 12 are rotatably connected to the inside of the crossbeam 2. The two transmission arms 9 are respectively set inside their respective placement slots 37.

[0033] The locking mechanism includes a fixed sleeve 13, which is fixedly installed at the bottom end of the crossbeam 2. A lock head 14 is rotatably installed inside the fixed sleeve 13. A connecting plate 15 is fixedly installed on the outside of the top of the lock head 14. A connecting shaft 16 is fixedly installed at one end of the top of the connecting plate 15. The connecting shaft 16 cooperates with the corresponding connecting hole 10. A connecting hole 17 is opened at one end of the connecting plate 15. A connecting shaft 18 is sleeved inside the connecting hole 17. The connecting shaft 18 is fixedly connected to the corresponding lower pressure frame 35.

[0034] The monitoring mechanism includes a retaining pin 19 and a sensor 21. The retaining pin 19 is slidably connected to the crossbeam 2. A spring 20 is sleeved on the outside of the retaining pin 19. The sensor 21 is fixedly installed inside the crossbeam 2. The top of the retaining pin 19 cooperates with the sensor 21 and the corresponding wedge block 22.

[0035] The first displacement mechanism includes two guide rods 23 and a U-shaped bracket 25. The two guide rods 23 are fixedly installed inside the crossbeam 2 and slidably installed at both ends of the corresponding wedge blocks 22. Springs 24 are sleeved on the outside of the two guide rods 23. The U-shaped bracket 25 is sleeved on the end of the corresponding lower pressure frame 35. Two guide rods 26 are slidably sleeved on one end of the U-shaped bracket 25. The two guide rods 26 are fixedly connected to the crossbeam 2. A flipping rod 27 is rotatably installed at the bottom of the U-shaped bracket 25. The bottom end of the flipping rod 27 is rotatably connected to the corresponding wedge block 22.

[0036] The second displacement mechanism includes a sliding seat 28 and a fixed shaft 33. The sliding seat 28 is slidably mounted on the top of the corresponding wedge block 22. A spring 39 is fixedly mounted between one side of the sliding seat 28 and the inner wall of the wedge block 22. A flipping rod 20 is rotatably mounted on the top of the sliding seat 28. The top end of the flipping rod 20 is rotatably connected to the corresponding flipping rod 1 27. A top rod 31 is rotatably mounted on the end of the sliding seat 28 away from the spring 39. A strip groove 32 is opened inside the top rod 31. The fixed shaft 33 is fixedly mounted inside the crossbeam 2 and is located inside the strip groove 32.

[0037] Each of the multiple wedge blocks 22 has a T-shaped limiting groove 34 on its top, and multiple sliding seats 28 are slidably installed inside their respective T-shaped limiting grooves 34.

[0038] Working principle: Before use, four steel wire ropes need to be connected to the top of the connecting seat 3. Then, the steel wire ropes are connected to the hook in the crane to complete the connection preparation before hoisting. When hoisting the container, the frame 1 is moved to the top of the container by the crane, and the position of the frame 1 on the top of the container is adjusted so that the four lock heads 14 correspond to the lock holes in the four corner pieces of the container. In one of the monitoring mechanisms, the movement process of the holding pin 19 contacting the corresponding corner piece is as follows: When the bottom of the holding pin 19 touches the top of the corresponding corner piece, the holding pin 19 is forced to move into the crossbeam 2 to the maximum stroke position and squeezes the spring 20. The top of the holding pin 19 touches the sensor 21, and the sensor 21 transmits the signal to the port container crane remote control system. The holding pins 19 in the other multiple monitoring mechanisms have the same movement process when they contact their respective corresponding corner pieces.

[0039] When one of the mounting pins 19 moves upward, the corresponding wedge block 22, the first displacement mechanism, and the second displacement mechanism all move accordingly. The movement process of one set of wedge blocks 22, the first displacement mechanism, and the second displacement mechanism is as follows: As the mounting pin 19 moves upward, the top of the mounting pin 19 acts on the corresponding wedge block 22. The wedge block 22 slides along the two guide rods 23 under force and compresses the two springs 24. As the wedge block 22 moves, the flipping rod 27 at its top moves synchronously. The flipping rod 27 pulls the U-shaped bracket 25 at its top to move downward. At the same time, as the wedge block 22 moves, the sliding seat 28 at its top moves synchronously. The sliding seat 28 first moves along the two guide rods 23. As rod 23 moves, with the cooperation of fixed shaft 33 and slot 32, top rod 31 gradually rotates from an inclined state to a horizontal state. At this time, the corresponding lower pressure frame 35 descends a certain distance, thereby driving the transmission arm 9 inside the lower pressure frame 35 to move downward. One end of the transmission arm 9 moves downward along the corresponding connecting shaft 1 8 and drives the corresponding telescopic rod 11 to extend. At this time, the lower pressure frame 35 descends, the connecting shaft 3 18 does not disengage from the connecting hole 2 17, and the connecting shaft 2 16 does not enter the interior of the connecting hole 1 10. The corresponding transmission arm 9 is not connected to the corresponding lock head 14. When the other multiple locking pins 19 move, the corresponding wedge block 22, the first displacement mechanism, and the second displacement mechanism are in the same motion process as described above.

[0040] When both adjacent locking pins 19 move upward to their limit positions, it indicates that the top surface of the corresponding corner piece is horizontal. At this time, both corresponding push rods 31 move, and the ends of the two push rods 31 that are close to each other press against each other. The sliding seats 28 at one end of the two push rods 31 press against their respective corresponding springs 29. The two sliding seats 28 slide away from each other along their respective T-shaped limiting grooves 34. The corresponding two flip rods 20 pull the top of their respective flip rods 1 27 downward, and the corresponding two U-shaped brackets 25 move forward. Pull the corresponding lower pressure frame 35 downwards. At this time, the lower pressure frame 35 moves to the bottom, and the corresponding transmission arm 9 moves to the bottom. The second connecting shaft 16 enters the interior of the first connecting hole 10, and the third connecting shaft 18 also disengages from the second connecting hole 17. At this time, the transmission arm 9 is connected to the corresponding lock head 14. At this time, the corresponding drive motor 6 is started, and its bottom support plate 7 rotates. The two first connecting shafts 8 rotate synchronously. Under the action of the two transmission arms 9, the two corresponding lock heads 14 rotate and are locked into their respective lock holes to achieve the connection with the corner piece.

[0041] By installing two monitoring mechanisms on both sides of each lock head 14, the two ends of the top of the same corner piece are monitored by two adjacent holding pins 19 to determine whether the top surface of the corner piece is horizontal. This replaces the existing technology that only uses a single holding pin 19 to contact the corner piece, preventing the lock head 14 from still working and not entering the locking hole when the corner piece is damaged by impact, thus avoiding false locking and falling accidents during subsequent lifting. After the four lock heads 14 are connected to the four corner pieces, the remote control system of the port container crane is directly connected to the lifting device, and the lifting device is controlled remotely to complete the lifting and transfer of containers. With the lowering action; when the travel of the two locking pins 19 corresponding to the same corner piece is inconsistent, it indicates that the top of the corner piece is not in a horizontal state. At this time, in order to avoid the lock head 14 from false locking or the lock head 14 directly making hard contact with the corner piece, it is not necessary to start the drive mechanism. The staff needs to check the corner piece and take appropriate measures, such as repairing the corner piece, to ensure that the lock head 14 and the lock hole are accurately aligned. With the cooperation of the corresponding first displacement mechanism and second displacement mechanism, even if the drive mechanism is accidentally touched, the transmission arm 9 will not connect with the lock head 14, so that the lock head 14 will not directly make hard contact with the corner piece and cause damage to the lock head 14.

[0042] When the weights at both ends of the container are different, the cylinder 5 can be activated to pull the connecting seat 3 to slide along the two sliding rods 4, thereby adjusting the center of gravity of the frame 1 and ultimately achieving the overall balance of the frame 1.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A container lifting device with self-balancing function, comprising a frame (1), crossbeams (2) fixedly installed at both ends of the frame (1), and a connecting seat (3) disposed on the top of the frame (1), characterized in that: Both of the two crossbeams (2) are equipped with a drive mechanism inside. Both ends of the two crossbeams (2) are equipped with a locking mechanism and two monitoring mechanisms. Each locking mechanism is located between two adjacent monitoring mechanisms. Each monitoring mechanism is equipped with a wedge block (22) on one side. Each wedge block (22) is equipped with a first displacement mechanism and a second displacement mechanism. A pressure frame (35) is provided above each pair of adjacent wedge blocks (22). Both ends of the multiple pressure frames (35) are slidably equipped with guide rods (36). The multiple guide rods (36) are fixedly installed inside their respective crossbeams (2). One end of the multiple pressure frames (35) is provided with a placement groove (37). The driving mechanism includes a drive motor (6), and each of the two transmission arms (9) has a connection hole (10) at the end away from the drive motor (6). The top of each of the two transmission arms (9) away from the drive motor (6) is rotatably mounted with a telescopic rod (11). The top of each of the two telescopic rods (11) is rotatably mounted with a rotating plate (12). The top of each of the two rotating plates (12) is rotatably connected to the inside of the crossbeam (2). The two transmission arms (9) are respectively set inside their respective placement slots (37). The locking mechanism includes a lock head (14), a connecting plate (15) is fixedly installed on the outside of the top of the lock head (14), a connecting shaft two (16) is fixedly installed on one end of the top of the connecting plate (15), the connecting shaft two (16) cooperates with the corresponding connecting hole one (10), a connecting hole two (17) is opened on one end of the connecting plate (15), a connecting shaft three (18) is sleeved inside the connecting hole two (17), and the connecting shaft three (18) is fixedly connected to the corresponding pressure bracket (35); The monitoring mechanism includes a mounting pin (19) and a sensor (21). The mounting pin (19) is slidably connected to the crossbeam (2). A spring (20) is sleeved on the outside of the mounting pin (19). The sensor (21) is fixedly installed inside the crossbeam (2). The top of the mounting pin (19) cooperates with the sensor (21) and the corresponding wedge block (22). The first displacement mechanism includes two guide rods (23) and a U-shaped bracket (25). The two guide rods (23) are fixedly installed inside the crossbeam (2) and slidably installed at both ends of the corresponding wedge block (22). The two guide rods (23) are each fitted with a spring (24). The U-shaped bracket (25) is fitted at the end of the corresponding lower pressure frame (35). Two guide rods (26) are slidably fitted at one end of the U-shaped bracket (25). The two guide rods (26) are fixedly connected to the crossbeam (2). A flipping rod (27) is rotatably installed at the bottom of the U-shaped bracket (25). The bottom end of the flipping rod (27) is rotatably connected to the corresponding wedge block (22). The second displacement mechanism includes a sliding seat (28) and a fixed shaft (33). The sliding seat (28) is slidably installed on the top of the corresponding wedge block (22). A spring three (29) is fixedly installed between one side of the sliding seat (28) and the inner wall of the wedge block (22). A flipping rod two (30) is rotatably installed on the top of the sliding seat (28). The top end of the flipping rod two (30) is rotatably connected to the corresponding flipping rod one (27). A top rod (31) is rotatably installed on the end of the sliding seat (28) away from the spring three (29). A strip groove (32) is opened inside the top rod (31). The fixed shaft (33) is fixedly installed inside the crossbeam (2). The fixed shaft (33) is set inside the strip groove (32).

2. A container lifting device with self-balancing function according to claim 1, characterized in that: Both ends of the frame (1) are fixedly installed with slide rods (4), and the two ends of the bottom of the connecting seat (3) are respectively slidably sleeved on the outside of the two slide rods (4). A cylinder (5) is fixedly installed on the top of the frame (1), and the telescopic shaft end of the cylinder (5) is fixedly connected to the connecting seat (3).

3. A container lifting device with self-balancing function according to claim 1, characterized in that: The drive motor (6) is fixedly installed on the top of the crossbeam (2). A support plate (7) is fixedly installed on the output shaft end of the drive motor (6). A connecting shaft (8) is fixedly installed on both ends of the bottom of the support plate (7). A transmission arm (9) is slidably sleeved on the outside of the two connecting shafts (8).

4. A container lifting device with self-balancing function according to claim 1, characterized in that: The locking mechanism also includes a fixing sleeve (13), which is fixedly installed at the bottom end of the crossbeam (2), and a lock head (14) is rotatably installed inside the fixing sleeve (13).

5. A container lifting device with self-balancing function according to claim 1, characterized in that: The top of each of the wedge blocks (22) is provided with a T-shaped limiting groove (34), and the multiple sliding seats (28) are respectively slidably installed inside their respective T-shaped limiting grooves (34).

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