Container spreader for gantry crane

Abstract

The invention relates to the technical field of port machinery, and provides a container spreader for a gantry crane, which comprises a main frame, a hoisting frame, a connecting assembly, a position adjusting assembly, a cross beam, a hoisting assembly and a connecting assembly, the hoisting frame is fixedly mounted at the bottom of the main frame, the connecting assembly is mounted on the main frame, and the position adjusting assembly is mounted on the connecting assembly. The two cross beams are symmetrically and fixedly installed at the bottom of the hoisting frame, the hoisting assemblies are arranged on the two sides of the hoisting frame, the two hoisting assemblies are symmetrically arranged, the hoisting assemblies are installed at the ends of the cross beams, and the connecting assemblies are installed on the two hoisting assemblies. The problems that the lifting appliance and the container are damaged and the safety and the efficiency of lifting are influenced due to the fact that the container is likely to shake, shake and the like in the lifting process are solved.

Description

Technical Field

[0001] The invention relates to the technical field of port machinery, and in particular to a container spreader for a portal crane. Background Art

[0002] A gantry crane is a mechanical equipment used for loading and unloading large cargoes. It is usually used in places such as docks, ports or factories. They can move along the ground to lift cargoes from the ground or docks and place them on ships or other places. Gantry cranes are usually equipped with various types of spreaders, such as cranes, container cranes, etc. These spreaders can be used to load and unload different types of cargoes. Among them, container spreaders are spreaders specifically used for loading and unloading containers.

[0003] A container is a standardized cargo container, usually composed of six sides, which can carry a large amount of cargo. Container spreaders usually have long arms and multi-jointed designs so that they can easily lift the container and place it on the ground or on a ship.

[0004] When using a container spreader to lift a container, first determine the location of the container so that you can choose the right spreader for lifting. During the positioning process, pay special attention to the relationship with the surrounding environment to ensure the safety of the lifting process. At this time, start the portal crane and gradually raise it to an appropriate height. Then, align the spreader with the goods to be lifted, and ensure that the center of gravity of the spreader is parallel to the ground. When the spreader contacts the goods, adjust the angle and position of the spreader in time to ensure that the goods remain balanced. After lifting the goods off the ground and moving them to the designated location, adjust the direction and position of the spreader in time until the goods are accurately placed on the ground or at the designated location, then close the spreader and lower the portal crane to restore the spreader to its original position.

[0005] If the center position of the spreader and the container do not coincide, the support structure of the spreader will find it difficult to effectively resist the uneven force generated by the weight of the cargo, causing shaking and trembling during the lifting process. This will cause unnecessary wear between the two, such as damage to the spreader and breakage of the container. At the same time, the cargo is prone to swinging and shaking due to uneven center of gravity during the lifting process, which may cause damage to the cargo and even cause safety accidents, thus affecting the safety and efficiency of the entire lifting process. Summary of the invention

[0006] The present invention proposes a container hoist for a gantry crane, which solves the problem in the related art that deviation in the position of the hoist may cause shaking, trembling, etc. when lifting the container, resulting in damage to the hoist and the container, affecting the safety and efficiency of the lifting.

[0007] The technical solution of the present invention is as follows: A container spreader for a portal crane, comprising: Main frame; A lifting frame, wherein the lifting frame is fixedly mounted on the bottom of the main frame; A connecting assembly, the connecting assembly is mounted on the main frame and is used for docking with the lifting equipment; A position adjustment component, which is mounted on the connecting component and is used to adjust the position of the connecting component on the main frame; A crossbeam, two crossbeams are symmetrically and fixedly installed at the bottom of the lifting frame; A lifting assembly, wherein the lifting assembly is disposed on both sides of the lifting frame, the two lifting assemblies are symmetrically arranged, and the lifting assembly is installed at the end of the crossbeam for lifting the container; A connecting assembly is installed on both of the two lifting assemblies and is used to connect containers.

[0008] Based on the above solution, the connection component includes: A sliding frame, the sliding frame is slidably mounted on the main frame; A connecting seat, the connecting seat is fixedly mounted on the upper part of the sliding frame; A connecting device is rotatably mounted on the connecting seat and is used to drive the connecting seat to rotate.

[0009] On the basis of the above scheme, the positioning component includes: Driving rods, two driving rods are symmetrically and rotatably mounted on the bottom of the sliding frame; Rollers, both ends of the two driving rods are fixedly mounted with the rollers, and the rollers are in contact with the bottom side of the main frame; A driving part is installed on the sliding frame and is used to drive the driving rod to rotate.

[0010] On the basis of the above scheme, the driving unit comprises: A first motor, wherein the first motor is fixedly mounted on the sliding frame; A driven gear, the driven gear being fixedly mounted on one of the driving rods; A driving gear, the driving gear is fixedly mounted on the first motor, and the driving gear is meshed with the driven gear; A sprocket, on which the two driving rods are fixedly mounted; A chain is meshed and installed between the two sprockets.

[0011] On the basis of the above scheme, the lifting assembly comprises: Mounting frames, the mounting frames are symmetrically arranged on both sides of the lifting frame, both ends of the two mounting frames are fixedly connected to the crossbeam, and the two mounting frames are symmetrically arranged; Wherein, both the upper and lower sides of the mounting frame are arch structures; A main beam, the main beam being fixedly mounted between the two mounting frames; Wherein, the interior of the main beam is a hollow structure.

[0012] In addition to the above solutions, it also includes: Mounting plates, a plurality of said mounting plates are fixedly mounted at equal distances inside the main beam, and each of said mounting plates is arranged vertically; A swing frame is rotatably mounted on both ends of the main beam.

[0013] Based on the above solution, the connection component includes: Guide frames, both ends of the two swing frames are fixedly mounted with the guide frames, and the four guide frames are symmetrically arranged; A connecting part, the bottom of each of the two swing frames is provided with the connecting part, which is used for connecting a container; A driving part is installed inside the swing frame and is used to drive the connecting part to move to a working position.

[0014] On the basis of the above solution, the connecting part comprises: Sleeves, both ends of the two swing frames are fixedly mounted with the sleeves, and the four sleeves are symmetrically arranged; A locking pin is rotatably mounted on each sleeve, and a working end position of the locking pin is higher than a bottom end position of the guide frame.

[0015] In addition to the above solutions, it also includes: A transmission shaft, wherein the transmission shaft is rotatably mounted inside the two swing frames; A first bevel gear, the top end of each of the locking pins being fixedly mounted with the first bevel gear; The second helical gear is fixedly mounted on both ends of the two transmission shafts, and the second helical gear is meshed with the first helical gear.

[0016] On the basis of the above scheme, the driving unit comprises: A worm gear, wherein the worm gear is fixedly mounted on the two transmission shafts; A worm, the two swing frames are rotatably mounted with the worm, the worm meshing with the worm wheel; The second motor is fixedly mounted on the two swing frames, and the output end of the second motor is fixedly connected to the worm.

[0017] The working principle and beneficial effects of the present invention are: 1. In the present invention, the first motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear drives one of the driving rods to rotate, and through the arrangement of the sprocket and the chain, the two driving rods can be driven to rotate at the same time, and the driving rod drives the roller to rotate. With the rotation of the roller, the sliding frame can be driven to slide on the main frame, and the center of gravity of the main frame can be adjusted, thereby adjusting the position between the hook part of the crane and the center of gravity of the container, so that the lifting process is more stable and the tilting of the container during the lifting process is reduced.

[0018] 2. In the present invention, by setting the mounting plate, the mounting plate will bear most of the pressure when the swing frame is subjected to force, thereby reducing the possibility of deformation of the main beam. At the same time, when the mounting frame is subjected to force, these forces will be dispersed by the arch structure of the mounting frame. While improving the bearing capacity, it will not increase the gravity of the sling itself too much, thereby greatly improving the bearing capacity of the sling.

[0019] 3. In the present invention, as the crane slowly lowers the lifting frame, the guide frame first contacts the container to correct the position of the swing frame. When one end of the swing frame contacts the higher part of the deformed position of the container, the swing frame swings around the axis position of the main shaft to a certain extent, so that the four locking pins correspond to the corresponding corner piece hole positions respectively. At this time, the second motor drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the second gear to rotate through the transmission shaft, the second bevel gear drives the first bevel gear to rotate, and the first bevel gear drives the corresponding locking pin to rotate, so that the locking pin is inserted into the corner piece hole position to fix the position of the container, making the fixing effect more firm and not easy to fall off, avoiding the possibility of vibration of the container due to the sudden rotation of a lock pin in the process of moving the container.

[0020] 4. In the present invention, the hook position of the crane and the center of gravity of the container can be adjusted by setting the positioning assembly, thereby improving the stability of the container during the lifting process. The four locking pins can be made to correspond to the corresponding corner hole positions by the rotation setting of the swing frame, thereby improving the firmness of the connection with the container and improving the efficiency of the connection. In addition, the arched structure of the mounting frame and the setting of the mounting plate can greatly improve the bearing capacity of the sling, making the lifting project more stable and greatly improving the safety and efficiency of the lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure from another angle in the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the position adjustment component in the present invention; Figure 4 It is a structural schematic diagram of the position adjustment component in the present invention; Figure 5 It is a schematic diagram of the structure of the cooperation between the lifting assembly and the connecting assembly in the present invention; Figure 6 It is a cross-sectional structural schematic diagram of the lifting assembly in the present invention; Figure 7 It is a schematic cross-sectional structural diagram of the connection assembly in the present invention; Figure 8 For the present invention Figure 4 A schematic diagram of the local enlarged structure at point A in the middle; Fig. 9 For the present invention Figure 7 A schematic diagram of the local enlarged structure at B in the middle; Fig.10 For the present invention Figure 7 Schematic diagram of the local enlarged structure at point C in the middle.

[0023] The numbers in the figure represent: 1. main frame; 2. lifting frame; 3. crossbeam; 4. sliding frame; 5. connecting seat; 6. connecting device; 7. driving rod; 8. roller; 9. first motor; 10. driven gear; 11. driving gear; 12. sprocket; 13. chain; 14. mounting frame; 15. main beam; 16. mounting plate; 17. swing frame; 18. guide frame; 19. sleeve; 20. locking pin; 21. transmission shaft; 22. first bevel gear; 23. second bevel gear; 24. worm gear; 25. worm; 26. second motor. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 10As shown, this embodiment proposes a container hoist for a gantry crane, including a main frame 1, a lifting frame 2, a connecting assembly, a positioning assembly, a crossbeam 3, a lifting assembly and a connecting assembly. The lifting frame 2 is fixedly mounted on the bottom of the main frame 1, and a connecting assembly is installed on the main frame 1 for docking with the lifting equipment. The connecting assembly includes a sliding frame 4, a connecting seat 5 and a connecting device 6. The sliding frame 4 is slidably mounted on the main frame 1, and the connecting seat 5 is fixedly mounted on the upper part of the sliding frame 4. The connecting device 6 is rotatably mounted on the connecting seat 5 for driving the connecting seat 5 to rotate.

[0026] Specifically, when lifting the container, first firmly connect the hook part of the gantry crane to the connecting device 6, and then lift the connecting device 6 through the crane, so as to lift the sliding frame 4 through the connecting seat 5. As the crane lifts the connecting device 6, the main frame 1 is driven to move through the sliding frame 4, and the main frame 1 drives the lifting frame 2 to move. At this time, in order to adjust the position of the lifting frame 2, the connecting device 6 is started, and the connecting device 6 drives the connecting seat 5 to rotate, thereby driving the sliding frame 4 to rotate through the connecting seat 5, thereby driving the lifting frame 2 to rotate through the main frame 1, so as to adjust the position of the lifting frame 2, and then move the lifting frame 2 to the upper part of the container that needs to be lifted away, start the connecting assembly to fix the container, and then lift the container through the lifting assembly. Through the setting of the adjustment assembly, the position between the hook part of the crane and the center of gravity of the container can be adjusted, so as to make the lifting process smoother.

[0027] like Figure 3 , Figure 4 As shown, the positioning assembly is installed on the connecting assembly, and is used to adjust the position of the connecting assembly on the main frame 1. The positioning assembly includes a driving rod 7, a roller 8 and a driving part. Two driving rods 7 are symmetrically and rotatably installed at the bottom of the sliding frame 4. Rollers 8 are fixedly installed at both ends of the two driving rods 7. The rollers 8 abut against the bottom side of the main frame 1. The driving part is installed on the sliding frame 4, and is used to drive the driving rod 7 to rotate.

[0028] Specifically, when adjusting the position between the sliding frame 4 and the main frame 1, the driving part is started, and the driving part drives the driving rod 7 to rotate, and the driving rod 7 drives the roller 8 to rotate, and the roller 8 abuts against the main frame 1. As the roller 8 rotates, the sliding frame 4 can be driven to slide on the main frame 1, and the center of gravity of the main frame 1 can be adjusted.

[0029] The above, such as Figure 4As shown, the driving part includes a first motor 9, a driven gear 10, a driving gear 11, a sprocket 12 and a chain 13. The first motor 9 is fixedly mounted on the sliding frame 4, the driven gear 10 is fixedly mounted on one of the driving rods 7, the driving gear 11 is fixedly mounted on the first motor 9, the driving gear 11 is meshed with the driven gear 10, the sprockets 12 are fixedly mounted on the two driving rods 7, and the chain 13 is meshed and mounted between the two sprockets 12.

[0030] Specifically, when driving the sliding frame 4 to move on the main frame 1, the first motor 9 is started, the first motor 9 drives the driving gear 11 to rotate, the driving gear 11 drives the driven gear 10 to rotate, and the driven gear 10 drives one of the driving rods 7 to rotate. Through the setting of the sprocket 12 and the chain 13, the two driving rods 7 can be driven to rotate at the same time.

[0031] like Figures 5 to 7 As shown, two cross beams 3 are symmetrically and fixedly installed at the bottom of the lifting frame 2, and lifting components are provided on both sides of the lifting frame 2. The two lifting components are symmetrically arranged, and the lifting components are installed at the ends of the cross beams 3 for lifting containers. The lifting components include mounting frames 14 and main beams 15. The mounting frames 14 are symmetrically arranged on both sides of the lifting frame 2, and both ends of the two mounting frames 14 are fixedly connected to the cross beams 3. The two mounting frames 14 are symmetrically arranged, wherein the upper and lower sides of the mounting frames 14 are arch structures, and the main beam 15 is fixedly installed between the two mounting frames 14, wherein the interior of the main beam 15 is a hollow structure, and also includes mounting plates 16 and swing frames 17, and multiple mounting plates 16 are fixedly installed at equal distances inside the main beam 15, and each mounting plate 16 is vertically arranged, and swing frames 17 are rotatably installed at both ends of the main beam 15.

[0032] Specifically, when lifting the container, the main beam 15 and the mounting frame 14 are driven to move through the lifting frame 2, thereby driving the swing frame 17 to move. If the container is deformed during transportation, or due to its own quality problems, the four corner holes of the container are not in the same plane, when one end of the swing frame 17 contacts the higher part of the deformed position of the container, the swing frame 17 at this time swings around the axial position of the main shaft to a certain extent, so that both ends of the swing frame 17 correspond to the corner hole positions of the container, so that the connecting components correspond to the corresponding corner hole positions, which greatly improves the lifting efficiency. Through the setting of the mounting plate 16, the mounting plate 16 will bear most of the pressure when the swing frame 17 is under force, thereby reducing the possibility of deformation of the main beam 15. At the same time, when the mounting frame 14 is under force, these forces will be dispersed by the arched structure of the mounting frame 14, which will increase the bearing capacity without increasing the gravity of the sling itself too much.

[0033] like Figure 7As shown, the two lifting assemblies are both equipped with connecting assemblies for connecting containers, and the connecting assemblies include a guide frame 18, a connecting part and a driving part. The two ends of the two swing frames 17 are both fixedly equipped with guide frames 18, and the four guide frames 18 are symmetrically arranged. The bottoms of the two swing frames 17 are both equipped with connecting parts for connecting containers, and the driving part is installed inside the swing frame 17 to drive the connecting part to move to the working position. Specifically, when the lifting frame 2 moves to above the container, as the crane slowly lowers the lifting frame 2, the guide frame 18 at this time first contacts the container, thereby correcting the position of the swing frame 17, making its connecting part more easily correspond to the corner piece hole, thereby improving the lifting efficiency.

[0034] The above, such as Fig. 9 As shown, the connecting portion includes a sleeve 19 and a locking pin 20. The sleeves 19 are fixedly installed at both ends of the two swing frames 17. The four sleeves 19 are symmetrically arranged. A locking pin 20 is rotatably installed on each sleeve 19. The working end position of the locking pin 20 is higher than the bottom end position of the guide frame 18. It also includes a transmission shaft 21, a first bevel gear 22 and a second bevel gear 23. The transmission shaft 21 is rotatably installed inside the two swing frames 17. The top of each locking pin 20 is fixedly installed with a first bevel gear 22. The two ends of the two transmission shafts 21 are fixedly installed with a second bevel gear 23, and the second bevel gear 23 is meshed with the first bevel gear 22.

[0035] Specifically, when the container is hoisted, after the swing frame 17 moves to the hoisting position, the four locking pins 20 correspond to the corresponding corner piece hole positions respectively, and the driving transmission shaft 21 is driven to rotate, and the transmission shaft 21 drives the second bevel gear 23 to rotate, and the second bevel gear 23 drives the first bevel gear 22 to rotate, and the first bevel gear 22 drives the corresponding locking pin 20 to rotate, thereby inserting the locking pin 20 into the corner piece hole position, thereby fixing the position of the container.

[0036] The above, such as Fig.10 As shown, the driving part includes a worm wheel 24, a worm 25 and a second motor 26. The worm wheels 24 are fixedly mounted on the two transmission shafts 21, the worm 25 is rotatably mounted on the two swing frames 17, the worm 25 is meshed with the worm wheel 24, the second motor 26 is fixedly mounted on the two swing frames 17, and the output end of the second motor 26 is fixedly connected to the worm 25.

[0037] Specifically, when the drive shaft 21 is driven to rotate, the second motor 26 is started, the second motor 26 drives the worm 25 to rotate, the worm 25 drives the worm wheel 24 to rotate, and the worm wheel 24 can drive the drive shaft 21 to rotate. When the position of the locking pin 20 needs to be fixed, the second motor 26 is turned off and locked. At this time, the worm wheel 24 and the worm 25 are in a self-locking state, thereby avoiding the possibility of vibration or even falling of the container due to the sudden rotation of a locking pin 20 during the moving of the container.

[0038] To sum up, when lifting a container, first connect the hook part of the gantry crane firmly to the connecting device 6, and then lift the connecting device 6 through the crane, so as to lift the sliding frame 4 through the connecting seat 5. As the crane lifts the connecting device 6, the main frame 1 is driven to move through the sliding frame 4, and the main frame 1 drives the lifting frame 2 to move. When the lifting frame 2 moves to above the container, the lifting frame 2 is slowly lowered by the crane.

[0039] The lifting frame 2 drives the main beam 15 and the mounting frame 14 to move, thereby driving the swing frame 17 to move. If the container is deformed during transportation, or due to its own quality problems, the four corner holes of the container are not in the same plane, before one end of the swing frame 17 contacts the higher part of the deformed position of the container, the guide frame 18 at this time first contacts the container, thereby correcting the position of the swing frame 17, making it easier for its connecting part to correspond to the corner hole, thereby improving the lifting efficiency. At this time, the swing frame 17 swings around the axial position of the main shaft to a certain extent, so that both ends of the swing frame 17 correspond to the corner hole positions of the container until both swing frames 17 move to the lifting position.

[0040] When the swing frame 17 moves to the lifting position, the four locking pins 20 correspond to the corresponding corner piece hole positions respectively. At this time, the second motor 26 is started, and the second motor 26 drives the worm 25 to rotate, and the worm 25 drives the worm wheel 24 to rotate, and the worm wheel 24 can drive the transmission shaft 21 to rotate, and the transmission shaft 21 drives the second bevel gear 23 to rotate, and the second bevel gear 23 drives the first bevel gear 22 to rotate, and the first bevel gear 22 drives the corresponding locking pin 20 to rotate, so that the locking pin 20 is inserted into the corner piece hole position. When the position of the locking pin 20 needs to be fixed, the second motor 26 can be turned off and locked. At this time, the worm wheel 24 and the worm 25 are in a self-locking state, thereby avoiding the possibility of vibration or even falling of the container due to the sudden rotation of a locking pin 20 during the moving of the container, thereby greatly improving the lifting efficiency.

[0041] By setting the mounting plate 16, the mounting plate 16 will bear most of the pressure when the swing frame 17 is under stress, thereby reducing the possibility of deformation of the main beam 15. At the same time, when the mounting frame 14 is under stress, these forces will be dispersed by the arch structure of the mounting frame 14, which will improve the bearing capacity without increasing the gravity of the sling itself too much, thereby making the lifting process smoother.

[0042] In order to further improve the stability when lifting the container, the position between the hook part of the crane and the center of gravity of the container can also be adjusted, and the first motor 9 is started. The first motor 9 drives the driving gear 11 to rotate, and the driving gear 11 drives the driven gear 10 to rotate. The driven gear 10 drives one of the driving rods 7 to rotate. Through the setting of the sprocket 12 and the chain 13, the two driving rods 7 can be driven to rotate at the same time. The driving rod 7 drives the roller 8 to rotate, and the roller 8 is in contact with the main frame 1. With the rotation of the roller 8, the sliding frame 4 can be driven to slide on the main frame 1, and the center of gravity of the main frame 1 can be adjusted.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A container spreader for a portal crane, characterized in that: include: Main frame (1); A lifting frame (2), the lifting frame (2) being fixedly mounted on the bottom of the main frame (1); A connecting assembly, the main frame (1) being mounted with the connecting assembly for docking with a lifting device; a position adjustment component, the position adjustment component being mounted on the connecting component and being used to adjust the position of the connecting component on the main frame (1); A crossbeam (3), two crossbeams (3) being symmetrically and fixedly mounted on the bottom of the lifting frame (2); A lifting assembly, wherein the lifting assembly is provided on both sides of the lifting frame (2), the two lifting assemblies are symmetrically arranged, and the lifting assembly is installed at the end of the crossbeam (3) and is used to lift the container; A connecting assembly is installed on both of the two lifting assemblies and is used to connect containers.

2. A container spreader for a portal crane according to claim 1, characterized in that: The connection component comprises: A sliding frame (4), the sliding frame (4) being slidably mounted on the main frame (1); A connecting seat (5), the connecting seat (5) being fixedly mounted on the upper part of the sliding frame (4); A connecting device (6), wherein the connecting device (6) is rotatably mounted on the connecting seat (5).

3. A container spreader for a portal crane according to claim 2, characterized in that: The positioning component comprises: A driving rod (7), wherein two driving rods (7) are symmetrically and rotatably mounted on the bottom of the sliding frame (4); Rollers (8), the two ends of the two driving rods (7) are fixedly mounted with the rollers (8), the rollers (8) abutting against the bottom side of the main frame (1); A driving unit, the driving unit is mounted on the sliding frame (4) and is used to drive the driving rod (7) to rotate.

4. A container spreader for a portal crane according to claim 3, characterized in that: The driving unit comprises: A first motor (9), the first motor (9) being fixedly mounted on the sliding frame (4); A driven gear (10), the driven gear (10) being fixedly mounted on one of the driving rods (7); A driving gear (11), the driving gear (11) being fixedly mounted on the first motor (9), the driving gear (11) being meshed with the driven gear (10); A sprocket (12), the sprocket (12) being fixedly mounted on each of the two driving rods (7); A chain (13) is meshedly installed between the two sprocket wheels (12).

5. The container spreader for a portal crane according to claim 4, characterized in that: The lifting assembly comprises: Mounting frames (14), the mounting frames (14) being symmetrically arranged on both sides of the lifting frame (2), both ends of the two mounting frames (14) being fixedly connected to the crossbeam (3), and the two mounting frames (14) being symmetrically arranged; Wherein, both the upper and lower sides of the mounting frame (14) are arch structures; A main beam (15), the main beam (15) being fixedly mounted between the two mounting frames (14); Wherein, the interior of the main beam (15) is a hollow structure.

6. The container spreader for a portal crane according to claim 5, characterized in that: Also includes: A mounting plate (16), wherein a plurality of the mounting plates (16) are fixedly mounted at equal intervals inside the main beam (15), and each mounting plate (16) is arranged vertically; A swing frame (17) is rotatably mounted on both ends of the main beam (15).

7. The container spreader for a portal crane according to claim 6, characterized in that: The connection component comprises: A guide frame (18), wherein the two ends of the two swing frames (17) are fixedly mounted with the guide frames (18), and the four guide frames (18) are symmetrically arranged; A connecting part, the bottom of each of the two swing frames (17) is provided with the connecting part, which is used for connecting a container; A driving part, the driving part is installed inside the swing frame (17) and is used to drive the connecting part to move to a working position.

8. The container spreader for a portal crane according to claim 7, characterized in that: The connecting portion comprises: A sleeve (19), wherein the sleeves (19) are fixedly mounted on both ends of the two swing frames (17), and the four sleeves (19) are symmetrically arranged; A locking pin (20) is rotatably mounted on each sleeve (19), and a working end position of the locking pin (20) is higher than a bottom end position of the guide frame (18).

9. The container spreader for a portal crane according to claim 8, characterized in that: Also includes: A transmission shaft (21), wherein the transmission shaft (21) is rotatably mounted inside the two swing frames (17); A first bevel gear (22), the top end of each of the locking pins (20) being fixedly mounted with the first bevel gear (22); A second bevel gear (23), wherein the second bevel gear (23) is fixedly mounted on both ends of the two transmission shafts (21), and the second bevel gear (23) is meshed with the first bevel gear (22).

10. The container spreader for a portal crane according to claim 9, characterized in that: The driving unit comprises: A worm gear (24), the worm gear (24) being fixedly mounted on both of the transmission shafts (21); A worm (25), the worm (25) being rotatably mounted on both of the two swing frames (17), the worm (25) being meshed with the worm wheel (24); A second motor (26), the second motor (26) being fixedly mounted on each of the two swing frames (17), and an output end of the second motor (26) being fixedly connected to the worm (25).

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