A self-stabilizing electric lifting unloading device for containers

Abstract

The application discloses a self-stabilized electric lifting unloading device for containers and relates to the technical field of electric lifting, and provides a self-stabilized electric lifting unloading device for containers, which comprises a main beam and a support arm, the support arm is located at the two ends of the main beam, a spin lock is arranged on the support arm, the spin lock can be automatically locked on the container, support seats are arranged at the two ends of the main beam, pulley pieces are arranged on the support seats, steel wires are arranged around the pulley pieces, the steel wires are connected to electric lifters, detection assemblies are arranged at the middle positions of the main beam, and the detection assemblies are used for detecting whether the main beam is inclined; when lifting operation is performed, the electric lifters provide power, the containers fixed by the spin locks are lifted through cooperation between the steel wires and the pulley pieces, and in order to prevent the containers from being inclined during lifting, the angles of the main beams are detected through the detection assemblies, and the positions of the main beams are adjusted through corresponding mechanisms.

Description

Technical Field

[0001] This invention relates to the field of electric lifting technology, specifically a self-stabilizing electric lifting and unloading device for containers. Background Technology

[0002] In port container handling operations, electric lifting and unloading devices are one of the core pieces of equipment, and their performance directly affects operational efficiency and safety.

[0003] Traditional hoisting methods primarily rely on mechanical clamping to prevent wire rope slippage. However, under sudden load changes or high ambient humidity, static friction can easily reach its limit, leading to a significant increase in the risk of slippage. This can cause equipment wear or, in severe cases, cargo falling from the rope. Existing anti-slip technologies cannot adapt to dynamic load changes in real time, and their anti-slip effectiveness is prone to decline after long-term use due to component wear.

[0004] During hoisting, containers often tilt due to uneven ground, fluctuating sea conditions, or uneven load distribution. Traditional methods often rely on manual adjustment of the twistlock position after observing the tilt, which is not only inefficient but also poses safety hazards due to operational delays. Summary of the Invention

[0005] The purpose of this invention is to provide a self-stabilizing electric lifting and unloading device for containers to solve the problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a self-stabilizing electric lifting and unloading device for containers. The electric lifting and unloading device includes a main beam and support arms. The support arms are located at both ends of the main beam and are equipped with rotary locks that can automatically lock onto the container. Support seats are provided at both ends of the main beam, and pulley components are provided on the support seats. Steel wire ropes are wound on the pulley components and connected to the electric lifter. A detection component is provided at the middle position of the main beam to detect whether the main beam is tilted.

[0007] This invention is used for container lifting in ports. The main beam serves as the primary support for the electric lifting device, with outriggers installed at both ends of the main beam. The size of the outriggers matches the size of the container. The twistlocks automatically lock into slots on the container, ensuring stability during lifting. The support base provides installation positions for the pulleys, which in turn provide winding positions for the wire rope. The specific configuration of the electric lifting device is existing technology and will not be elaborated here. During lifting operations, the electric lifting device provides power, and through the cooperation between the wire rope and the pulleys, the container secured by the twistlock is lifted. To prevent the container from tilting during lifting, the angle of the main beam is detected by a detection component, and its position is adjusted by a corresponding mechanism.

[0008] Furthermore, the pulley assembly includes a wheel body, a rotating shaft, and a liquid distribution plate. The wheel body is fitted onto the rotating shaft, which is rotatably connected to the support base. One end of the liquid distribution plate is fastened to the support base, and the other end of the liquid distribution plate is slidably connected to the wheel body. The inlet of the liquid distribution plate is connected to an external hydraulic station.

[0009] During lifting operations, the wire rope wound around the pulley may slip due to changes in load or other reasons. To prevent slippage, a liquid distribution plate is arranged on one side of the pulley. The liquid distribution plate can introduce a certain pressure, which is used as a driving force to prevent slippage. The shaft is installed on the support base to provide a rotation basis for the pulley components.

[0010] Furthermore, the wheel body is provided with an arc-shaped groove and a liquid guide channel, and an arc-shaped slider is provided on the rotating shaft. The arc-shaped slider is slidably connected to the arc-shaped groove. Support springs and arc-shaped magnetic rods are respectively provided on both sides of the arc-shaped slider. The support springs are tightly connected to the inner wall of the arc-shaped groove. A coil is wound around the outer side of the arc-shaped groove near the arc-shaped magnetic rod. The coil is connected to a detection system, which is used to detect the induced current generated on the coil.

[0011] When slipping: the curved magnetic rod moves relative to the coil.

[0012] When not slipping, the friction between the wheel and the wire rope is static friction. As the load increases or the tension difference increases, the static friction gradually approaches its maximum value. Therefore, when slipping is imminent, the friction between the wire rope and the wheel increases. Initially, with the cooperation of the support spring and the arc-shaped slider, the wheel rotates synchronously with the shaft. When slipping is imminent, the friction on the wheel increases, and the wheel and shaft move relative to each other. The wheel overcomes the elastic force of the support spring and shifts to one side, causing the arc-shaped magnetic rod to deflect at a certain angle along the arc-shaped groove. This causes the arc-shaped magnetic rod to move relative to the coil, generating an induced current. By detecting this induced current through a detection system, it can be determined whether slipping will occur between the wheel and the wire rope. The larger the induced current, the greater the probability of slipping.

[0013] Furthermore, the inlet of the liquid guide channel is connected to the inner cavity of the liquid distribution plate, and a movable component is provided at the outlet of the liquid guide channel. The movable component prevents slippage by increasing friction.

[0014] The power from the hydraulic station introduced by the liquid distribution plate is transmitted to the moving component through the liquid guide channel. The moving component is used to increase the friction between the wire rope and the wheel to prevent slippage.

[0015] Furthermore, the movable component includes a piston rod and an abutment block. The piston rod is slidably connected to the fluid channel, and the abutment block is fastened to the piston rod. The abutment block is used to abut against the surface of the wire rope.

[0016] Hydraulic pressure is transmitted to the piston rod through the fluid guide channel, causing the piston rod to move a certain distance along the fluid guide channel, thereby causing the abutment block to abut against the surface of the wire rope, increasing the contact area between the inner wall of the wheel and the wire rope, and increasing the pressure on the wire rope, thereby increasing the friction.

[0017] Furthermore, the detection assembly includes a mounting box, a float plate, a central conductive rod, and side conductive rods. The mounting box is securely connected to the main beam, and conductive liquid is added inside the mounting box. The float plate is slidably connected to the mounting box. The central conductive rod and the side conductive rods pass through the float plate and are fixed to the inner wall of the mounting box. The side conductive rods are arranged on both sides of the central conductive rod. The side conductive rods and the central conductive rod are connected to an external detection system. The detection system is used to detect the resistance between the central conductive rod and the side conductive rods and the conductive liquid.

[0018] If the main beam tilts during container lifting, the detection component installed in the middle of the main beam will also tilt synchronously at a certain angle. The mounting box in the detection component is filled with conductive fluid. Under the influence of the fluid's own weight, if the mounting box tilts, the surface of the conductive fluid will also tilt. The float floating on the conductive fluid will deflect at a certain angle with the mounting box, causing the side conductive rod on the tilted end to be immersed in the conductive fluid to a greater depth. When the detection system applies a certain voltage to the middle conductive rod and the side conductive rods, let the resistances of the conductive fluid between the middle conductive rod and the two side conductive rods be R1 and R2, respectively. Since there is more conductive fluid on the tilted side than on the other side, more current can pass through, meaning the resistance on the tilted side is smaller. In other words, the smaller the resistance value detected by the detection system on one side, the larger the tilt angle on that side.

[0019] Furthermore, the inner wall of the mounting box is provided with arc grooves on both sides, and the two ends of the floating plate are provided with arc surfaces, which are slidably connected to the arc grooves.

[0020] To ensure smooth movement between the float and the mounting box, an arc groove is used to match the arc surface, facilitating relative rotation between the float and the mounting box.

[0021] Furthermore, the middle conductive rod is provided with ball bearings, the side conductive rod is provided with arc-shaped segments, and the float plate is provided with arc-shaped holes. The ball bearings are rotatably connected to the float plate, and the arc-shaped segments are slidably connected to the arc-shaped holes.

[0022] The float plate rotates around the ball bearing on the central conductive rod. The arc-shaped hole and arc-shaped segment provide guidance for the rotation of the float plate and ensure the stability of the deflection process.

[0023] Furthermore, the outrigger is equipped with an installation chamber, which contains a hydraulic cylinder. The output end of the hydraulic cylinder is connected to the rotary lock transmission, and the hydraulic cylinder can automatically adjust the position of the rotary lock according to the tilt angle detected by the detection component.

[0024] When the detection component detects a tilt, it activates the hydraulic cylinder at the corresponding position, causing the rotary lock to move up or down a certain distance along the installation chamber, thereby adjusting the lifted container to a horizontal position and ensuring the safety of the lifting process.

[0025] Furthermore, the top of the abutment block is provided with several protrusions.

[0026] Several protrusions can increase the roughness of the contact block surface, thereby further increasing the friction and preventing slippage.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The pulley component introduces hydraulic pressure through the liquid distribution plate, which drives the piston rod and the abutment block to press against the surface of the wire rope. Combined with the protrusion design at the top of the abutment block, the friction is greatly increased, effectively preventing the wire rope from slipping due to load changes. The linkage mechanism between the arc-shaped magnetic rod and the coil inside the pulley monitors the risk of slippage in real time through the induced current, triggering the hydraulic system to pressurize immediately and achieve a rapid anti-slip response.

[0029] 2. The detection component accurately captures the tilt angle of the main beam by detecting changes in the level of the conductive liquid and the deflection of the float. It reflects the degree of tilt by measuring the resistance difference, ensuring detection sensitivity. The detection signal triggers the hydraulic cylinder in the outrigger to move up and down, dynamically adjusting the container's posture to a horizontal state, avoiding safety hazards caused by tilting. It is especially suitable for operations in complex situations. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the pulley component of the present invention;

[0032] Figure 3 This is a partial cross-sectional view of the pulley component of the present invention;

[0033] Figure 4 for Figure 3 A magnified view of part A;

[0034] Figure 5 This is a partial sectional view of the wheel body;

[0035] Figure 6 for Figure 5 A magnified view of section B;

[0036] Figure 7 for Figure 5 A magnified view of a portion at point C;

[0037] Figure 8 This is a partial sectional view of the outrigger;

[0038] Figure 9 This is a schematic diagram of the detection component structure of the present invention;

[0039] Figure 10 This is a schematic diagram of the detection component.

[0040] In the diagram: 1. Main beam; 2. Support arm; 3. Rotary lock; 4. Support base; 5. Pulley assembly; 51. Wheel body; 511. Arc groove; 512. Liquid guide channel; 52. Rotating shaft; 521. Arc slider; 53. Liquid distribution plate; 54. Support spring; 55. Arc magnetic rod; 56. Coil; 57. Movable assembly; 571. Piston rod; 572. Abutment block; 5721. Protrusion; 6. Detection assembly; 61. Mounting box; 611. Arc groove; 62. Float plate; 621. Arc surface; 622. Arc hole; 63. Middle conductive rod; 631. Ball bearing; 64. Side conductive rod; 641. Arc segment; 7. Hydraulic cylinder. Detailed Implementation

[0041] 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.

[0042] Example: Figures 1-10 As shown, the present invention provides a self-stabilizing electric lifting and unloading device for containers. The electric lifting and unloading device includes a main beam 1 and a support arm 2. The support arm 2 is located at both ends of the main beam 1. A rotary lock 3 is provided on the support arm 2, which can automatically lock onto the container. Support seats 4 are provided at both ends of the main beam 1. Pulley components 5 are provided on the support seats 4. A steel wire rope is wound on the pulley component 5 and connected to the electric lifter. A detection component 6 is provided at the middle position of the main beam 1. The detection component 6 is used to detect whether the main beam 1 is tilted.

[0043] This invention is used for lifting containers in ports. The main beam 1 is the main support of the electric lifting device. The support arms 2 are installed at both ends of the main beam 1. The size of the support arms 2 matches the size of the container. The rotary lock 3 can automatically lock into the slot on the container, thereby ensuring the stability of the container during lifting. The support base 4 is used to provide an installation position for the pulley component 5. The pulley component 5 is used to provide a winding position for the wire rope. The specific setting of the electric lifting device is existing technology and will not be described in detail here. During the lifting operation, the electric lifting device provides power, and the container fixed by the rotary lock 3 is lifted through the cooperation between the wire rope and the pulley component 5. In order to prevent the container from tilting during the lifting process, the angle of the main beam 1 is detected by the detection component 6, and its position is adjusted by the corresponding mechanism.

[0044] The pulley component 5 includes a wheel body 51, a rotating shaft 52, and a liquid distribution plate 53. The wheel body 51 is sleeved on the rotating shaft 52, and the rotating shaft 52 is rotatably connected to the support base 4. One end of the liquid distribution plate 53 is fastened to the support base 4, and the other end of the liquid distribution plate 53 is slidably connected to the wheel body 51. The inlet of the liquid distribution plate 53 is connected to an external hydraulic station.

[0045] During lifting operations, the wire rope wound on the wheel body 51 may slip due to changes in load or other reasons. To prevent slippage, a liquid distribution plate 53 is arranged on one side of the wheel body 51. The liquid distribution plate 53 can introduce a certain pressure, which is used as a driving force to prevent slippage. The rotating shaft 52 is mounted on the support base 4 to provide a rotation base for the pulley component 5.

[0046] The wheel body 51 is provided with an arc-shaped groove 511 and a liquid guide channel 512. The rotating shaft 52 is provided with an arc-shaped slider 521, which is slidably connected to the arc-shaped groove 511. The two sides of the arc-shaped slider 521 are respectively provided with a support spring 54 and an arc-shaped magnetic rod 55. The support spring 54 is fastened to the inner wall of the arc-shaped groove 511. A coil 56 is wound around the outer side of the arc-shaped groove 511 near the arc-shaped magnetic rod 55. The coil 56 is connected to a detection system, which is used to detect the induced current generated on the coil 56.

[0047] When slipping: the curved magnetic rod 55 and the coil 56 move relative to each other.

[0048] When not slipping, the friction between the wheel 51 and the wire rope is static friction. As the load increases or the tension difference increases, the static friction gradually approaches its maximum value. Therefore, when slipping is imminent, the friction between the wire rope and the wheel 51 increases. Initially, with the cooperation of the support spring 54 and the arc-shaped slider 521, the wheel 51 rotates synchronously with the shaft 52. When slipping is imminent, the friction on the wheel 51 increases, and the wheel 51 will move relative to the shaft 52. The wheel 51 overcomes the elastic force of the support spring 54 and shifts to one side, causing the arc-shaped magnetic rod 55 to deflect at a certain angle along the arc-shaped groove 511. This causes the arc-shaped magnetic rod 55 to move relative to the coil 56, generating an induced current. By detecting this induced current through the detection system, it can be determined whether slipping will occur between the wheel 51 and the wire rope. The larger the induced current, the greater the probability of slipping.

[0049] The inlet of the liquid guide channel 512 is connected to the inner cavity of the liquid distribution plate 53, and the outlet of the liquid guide channel 512 is provided with a movable component 57, which prevents slippage by increasing friction.

[0050] The power from the hydraulic station introduced by the liquid distribution plate 53 is transmitted to the movable component 57 through the liquid guide channel 512. The movable component 57 is used to increase the friction between the wire rope and the wheel 51 to prevent slippage.

[0051] The movable component 57 includes a piston rod 571 and an abutment block 572. The piston rod 571 is slidably connected to the liquid guide channel 512, and the abutment block 572 is fastened to the piston rod 571. The abutment block 572 is used to abut against the surface of the wire rope.

[0052] Hydraulic pressure is transmitted to piston rod 571 through fluid guide channel 512, causing piston rod 571 to move a certain distance along fluid guide channel 512, thereby causing abutment block 572 to abut against the surface of wire rope, increasing the contact area between inner wall of wheel body 51 and wire rope, and increasing pressure on wire rope, thereby increasing friction.

[0053] The detection component 6 includes a mounting box 61, a float plate 62, a central conductive rod 63, and side conductive rods 64. The mounting box 61 is fastened to the main beam 1. Conductive liquid is added inside the mounting box 61. The float plate 62 is slidably connected to the mounting box 61. The central conductive rod 63 and the side conductive rods 64 pass through the float plate 62 and are fixed to the inner wall of the mounting box 61. The side conductive rods 64 are arranged on both sides of the central conductive rod 63. The side conductive rods 64 and the central conductive rod 63 are connected to an external detection system. The detection system is used to detect the resistance between the central conductive rods 63 and the side conductive rods 64 and the conductive liquid.

[0054] If the main beam 1 tilts during container lifting, the detection component 6 installed in the middle of the main beam 1 will also tilt synchronously with the main beam 1 at a certain angle. The mounting box 61 in the detection component 6 is filled with conductive liquid. Under the influence of the liquid's own weight, if the mounting box 61 tilts, the liquid surface of the conductive liquid will also tilt. The float 62 floating on the conductive liquid will deflect at a certain angle with the mounting box 61, causing the side conductive rod 64 on the tilted end to be immersed in the conductive liquid to a greater depth. When the detection system applies a certain voltage to the middle conductive rod 63 and the side conductive rod 64, let the resistances of the conductive liquid between the middle conductive rod 63 and the two side conductive rods 64 be R1 and R2, respectively. Since there is more conductive liquid on the tilted side than on the other side, more current can pass through, that is, the resistance on the tilted side is smaller. In other words, the smaller the resistance value detected by the detection system on one side, the larger the tilt angle on that side.

[0055] The inner wall of the mounting box 61 is provided with arc grooves 611 on both sides, and the two ends of the floating plate 62 are provided with arc surfaces 621, which are slidably connected to the arc grooves 611.

[0056] To ensure smooth movement between the float plate 62 and the mounting box 61, the arc groove 611 and the arc surface 621 are matched to facilitate relative rotation between the float plate 62 and the mounting box 61.

[0057] The middle conductive rod 63 is provided with a ball bearing 631, the side conductive rod 64 is provided with an arc-shaped section 641, and the float plate 62 is provided with an arc-shaped hole 622. The ball bearing 631 is rotatably connected to the float plate 62, and the arc-shaped section 641 is slidably connected to the arc-shaped hole 622.

[0058] The float 62 rotates around the ball 631 on the intermediate conductive rod 63. The arc-shaped hole 622 and the arc-shaped segment 641 cooperate to provide guidance for the rotation of the float 62 and ensure the stability of the deflection process.

[0059] The support arm 2 is equipped with an installation chamber, and a hydraulic cylinder 7 is installed inside the installation chamber. The output end of the hydraulic cylinder 7 is connected to the rotary lock 3. The hydraulic cylinder 7 can automatically adjust the position of the rotary lock 3 according to the tilt angle detected by the detection component 6.

[0060] When the detection component 6 detects a tilt, it activates the hydraulic cylinder 7 at the corresponding position, causing the rotary lock 3 to move up or down a certain distance along the installation chamber, thereby adjusting the lifted container to a horizontal state and ensuring the safety of the lifting process.

[0061] The top of the abutment block 572 is provided with several protrusions 5721.

[0062] Several protrusions 5721 can increase the roughness of the surface of the abutment block 572, thereby further increasing the friction and preventing slippage.

[0063] The working principle of this invention is as follows: During lifting operations, the main beam 1 serves as the core support, and the support arm 2 automatically locks into the container slot via the rotary lock 3 to secure the container. The electric lifter provides power through the wire rope wound around the pulley component 5, driving the container to lift vertically. A liquid distribution plate 53 is installed on one side of the pulley component 5, and an external hydraulic station is connected to introduce pressure. When the load on the wire rope changes and may cause slippage, the hydraulic pressure is transmitted to the moving component 57 through the liquid guide channel 512, thereby driving the piston rod 571 and the abutment block 572 to move. The abutment block 572 presses against the surface of the wire rope, increasing friction and preventing slippage. The wheel body 51 is designed with an arc-shaped groove 511 and a liquid guide channel 512. The arc-shaped slider 521 on the rotating shaft 52 is linked with the support spring 54 and the arc-shaped magnetic rod 55. When the wire rope is about to slip, the wheel body 51 and the rotating shaft 52 generate relative displacement, and the arc-shaped magnetic rod 55 and the coil 56 move relative to each other, generating an induced current. The detection system determines the risk of slippage by the magnitude of the current and triggers the active component 57 to apply pressure for anti-slip. For self-stabilizing adjustment, the detection component 6 in the middle of the main beam 1 monitors tilt by changing the conductive liquid level. If the main beam tilts, the conductive liquid level shifts, causing the float 62 to deflect. The difference in contact resistance between the side conductive rods 64 on both sides of the central conductive rod 63 and the conductive liquid is captured by the detection system; the side with the smaller resistance value has a larger tilt angle. The detection signal triggers the hydraulic cylinder 7 inside the outrigger 2 to move. The hydraulic cylinder 7 drives the rotary lock 3 to move up and down, adjusting the container's attitude to a horizontal state to ensure stability during the lifting process.

[0064] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-stabilizing electric lifting and unloading device for containers, characterized in that: The electric lifting and unloading device includes a main beam (1) and a support arm (2). The support arm (2) is located at both ends of the main beam (1). The support arm (2) is provided with a rotary lock (3). The rotary lock (3) can be automatically locked onto the container. The two ends of the main beam (1) are provided with support seats (4). The support seats (4) are provided with pulley components (5). The pulley components (5) are wound with steel wire ropes. The steel wire ropes are connected to the electric lifting device. The middle position of the main beam (1) is provided with a detection component (6). The detection component (6) is used to detect whether the main beam (1) is tilted. The pulley component (5) includes a wheel body (51), a rotating shaft (52), and a liquid distribution plate (53). The wheel body (51) is sleeved on the rotating shaft (52). The rotating shaft (52) is rotatably connected to the support base (4). One end of the liquid distribution plate (53) is fastened to the support base (4), and the other end of the liquid distribution plate (53) is slidably connected to the wheel body (51). The inlet of the liquid distribution plate (53) is connected to an external hydraulic station. The wheel body (51) is provided with an arc-shaped groove (511) and a liquid guide channel (512). The rotating shaft (52) is provided with an arc-shaped slider (521). The arc-shaped slider (521) is slidably connected to the arc-shaped groove (511). Support springs (54) and arc-shaped magnetic rods (55) are provided on both sides of the arc-shaped slider (521). The support springs (54) are fastened to the inner wall of the arc-shaped groove (511). A coil (56) is wound around the outer side of the arc-shaped groove (511) near the arc-shaped magnetic rod (55). The coil (56) is connected to an external detection system. The detection system is used to detect the induced current generated on the coil (56). When slipping: the arc-shaped magnetic rod (55) and the coil (56) move relative to each other.

2. The self-stabilizing electric lifting and unloading device for containers according to claim 1, characterized in that: The inlet of the liquid guide channel (512) is connected to the inner cavity of the liquid distribution plate (53), and a movable component (57) is provided at the outlet of the liquid guide channel (512). The movable component (57) prevents slippage by increasing friction.

3. The self-stabilizing electric lifting and unloading device for containers according to claim 2, characterized in that: The movable component (57) includes a piston rod (571) and an abutment block (572). The piston rod (571) is slidably connected to the liquid guide channel (512), and the abutment block (572) is fastened to the piston rod (571). The abutment block (572) is used to abut against the surface of the wire rope.

4. The self-stabilizing electric lifting and unloading device for containers according to claim 1, characterized in that: The detection component (6) includes a mounting box (61), a float plate (62), a middle conductive rod (63), and a side conductive rod (64). The mounting box (61) is fastened to the main beam (1). Conductive liquid is added to the mounting box (61). The float plate (62) is slidably connected to the mounting box (61). The middle conductive rod (63) and the side conductive rod (64) pass through the float plate (62) and are fixed to the inner wall of the mounting box (61). The side conductive rod (64) is arranged on both sides of the middle conductive rod (63). The side conductive rod (64) and the middle conductive rod (63) are connected to an external detection system. The detection system is used to detect the resistance between the middle conductive rod (63) and the side conductive rod (64) and the conductive liquid.

5. A self-stabilizing electric lifting and unloading device for containers according to claim 4, characterized in that: The inner wall of the mounting box (61) is provided with arc grooves (611) on both sides, and the two ends of the floating plate (62) are provided with arc surfaces (621), and the arc surfaces (621) are slidably connected to the arc grooves (611).

6. A self-stabilizing electric lifting and unloading device for containers according to claim 4, characterized in that: The middle conductive rod (63) is provided with a ball bearing (631), the side conductive rod (64) is provided with an arc segment (641), the float plate (62) is provided with an arc hole (622), the ball bearing (631) is rotatably connected to the float plate (62), and the arc segment (641) is slidably connected to the arc hole (622).

7. A self-stabilizing electric lifting and unloading device for containers according to claim 4, characterized in that: The support arm (2) is provided with an installation chamber, and a hydraulic cylinder (7) is provided in the installation chamber. The output end of the hydraulic cylinder (7) is connected to the rotary lock (3) for transmission. The hydraulic cylinder (7) can automatically adjust the position of the rotary lock (3) according to the tilt angle detected by the detection component (6).

8. A self-stabilizing electric lifting and unloading device for containers according to claim 3, characterized in that: The top of the abutment block (572) is provided with several protrusions (5721).

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