Crane with single-beam structure

Abstract

The utility model discloses a crane with a single beam structure, which comprises a cross beam, a chain body adjusting mechanism, a beam body mounting mechanism and a clamping auxiliary mechanism, the chain body adjusting mechanism comprises a connecting frame, an adjusting frame, a bolt hole, an adjusting plate and a hanging chain, and the beam body mounting mechanism comprises a longitudinal beam, a fixing sleeve, a clamping pipe, a clamping rod, a rotating sleeve, a gradient groove, an extending frame and a clamping groove. The length and the tension of the hanging chain can be rapidly and accurately adjusted through the multiple sets of bolt holes and the adjusting plates on the adjusting frame, the stability and the safety of a hoisted object in the hoisting operation are guaranteed, external bolts can rapidly penetrate through the bolt holes to fix the adjusting plates through the design of the adjusting frame, and therefore the hanging chain adjusting process is simplified, and the hoisting efficiency is improved. The design of the clamping mechanism and the rotating sleeve can adapt to different working environments and requirements, flexible adjustment and fixation of the position of the beam body are achieved, connection between the clamping pipe and the fixing sleeve is enhanced through fixed installation of the connecting plate and the clamping pipe, and the stability of the whole structure is ensured.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and more specifically, to a crane with a single beam structure. Background Technology

[0002] In existing technologies, although single-beam cranes can meet some basic lifting requirements, they have some operational inconveniences in practical applications, especially the installation and disassembly process between the crossbeams and longitudinal beams, as well as the adjustment of the chain assembly.

[0003] In existing designs, the connection between crossbeams and longitudinal beams typically relies on traditional bolted connections or welded structures. While this connection method offers high stability and strength, it is complex and time-consuming to install and disassemble, especially during equipment maintenance, repair, or reconfiguration. Workers need to expend a significant amount of time and effort on disassembly and reassembly. Due to the high tightness of the connectors, additional tools are often required for disassembly, and problems such as bolt jamming, corrosion, or wear may occur during disassembly, leading to low work efficiency.

[0004] The chain hoisting assembly is an important component of a crane, and its function is to provide traction force for the load during hoisting operations. However, most existing chain hoisting adjustment systems are designed to be cumbersome and cannot be adjusted quickly and accurately. In actual work, operators often need to use complicated tools to adjust the position of the chain, which is not only time-consuming but also increases the safety hazards during operation. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a crane with a single beam structure to solve the technical problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: A crane with a single beam structure, comprising a crossbeam, a chain adjustment mechanism, a beam installation mechanism, and a locking auxiliary mechanism. The chain adjustment mechanism includes a connecting frame, an adjustment frame, bolt holes, an adjustment plate, and a hanging chain. The connecting frame is installed at the bottom end of the adjustment frame. Multiple bolt holes are provided on the side wall of the adjustment frame. Two sets of adjustment plates are slidably installed on the adjustment frame. The hanging chain is installed at the bottom end of the adjustment plate. External bolts can pass through the bolt holes and the adjustment plate to fix the adjustment plate in the desired position. The beam installation mechanism includes a longitudinal beam, a fixed sleeve, a locking pipe, a locking rod, a rotating sleeve, a slope groove, an extension frame, and a locking slot. The fixed sleeve is installed at the top end of the longitudinal beam. The locking pipe is fixedly installed on the fixed sleeve. The locking slot is provided on the side wall of the locking rod. The rotating sleeve is rotatably installed on the outer wall of the locking pipe. The slope groove is provided on the inner wall of the rotating sleeve. The extension frame is slidably installed on the outer wall of the locking pipe. The rotating sleeve uses the slope groove to push or pull the extension frame into or away from the locking slot.

[0009] The present invention is further configured such that the snap-fit ​​auxiliary mechanism includes an annular groove, an elastic plate, an extension block, a threaded ring, a rotary push plate, and a directional slope plate. The annular groove is located at the top end of the rotating sleeve. Multiple sets of elastic plates are installed on the outer wall of the snap-fit ​​tube. The extension block is installed at one end of the elastic plate and extends into the annular groove, allowing the rotating sleeve to rotate stably. The threaded ring is threadedly connected to the outer wall of the snap-fit ​​tube. The rotary push plate is installed at the top end of the threaded ring. The directional slope plate is directionally slidably installed on the outer wall of the snap-fit ​​tube. The rotation of the rotary push plate pushes the directional slope plate to slide directionally, causing the directional slope plate to press against the bottom end of the rotating sleeve, thus fixing the rotating sleeve in the rotation direction.

[0010] The present invention is further configured such that a base frame is installed at the bottom end of the longitudinal beam, and bottom wheels are symmetrically installed at the bottom end of the base frame. The base frame and the symmetrically installed bottom wheels enable the crane to move smoothly and facilitate position adjustment in different working environments.

[0011] The present invention is further configured such that a mobile hoist is installed on the crossbeam, and a hook assembly is installed at the bottom end of the mobile hoist. The hook assembly is connected to the connecting frame. With the mobile hoist and the hook assembly, more flexible lifting operations can be achieved, especially in confined spaces or complex environments, providing greater adaptability.

[0012] The present invention is further configured such that a horizontal bolt is installed at the top end of the adjusting plate, and the bottom end of the horizontal bolt is in contact with the top end of the adjusting frame for support. The horizontal bolt at the top of the adjusting plate is in contact with the adjusting frame for support, ensuring the stability and reliability of the adjusting plate and preventing it from shifting or loosening during operation.

[0013] The present invention is further configured such that a connecting plate is installed at the bottom end of the side wall of the clamping tube, and the connecting plate is fixedly installed on the side of the fixing sleeve. The connection plate is fixedly installed on the clamping tube, which enhances the connection stability between the clamping tube and the fixing sleeve and avoids structural loosening.

[0014] The present invention is further configured such that the snap-fit ​​rod can extend into the fixing sleeve and the crossbeam, and extend into the snap-fit ​​tube to cooperate with the quick snap-fit ​​setting. The snap-fit ​​tube and the snap-fit ​​rod achieve stable connection and positioning through rotation and sliding, ensuring the firmness and reliability of the beam structure.

[0015] The present invention is further configured such that a slope plate is installed at one end of the extension frame, and the slope plate is slidably guided within the slope groove. The slope plate slides and guides within the slope groove to ensure the precise movement of the extension frame, making the adjustment process more stable and easier to control.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a crane with a single beam structure, which has the following features:

[0018] Beneficial effects:

[0019] This utility model is equipped with a chain adjustment mechanism. Through multiple sets of bolt holes and adjustment plates on the adjustment frame, the length and tension of the hanging chain can be quickly and accurately adjusted to ensure the stability and safety of the suspended load during lifting operations. The design of the adjustment frame allows external bolts to quickly pass through the bolt holes to fix the adjustment plate, thereby simplifying the chain adjustment process and reducing operation time and complexity. The adjustment plate is fixed in the required position by external bolts to prevent displacement or loosening of the adjustment plate during the adjustment process, thus ensuring the stability and safety of the adjustment process.

[0020] This utility model features a beam installation mechanism. The design between the longitudinal beam and the fixing sleeve, clamping pipe, and clamping rod allows for convenient installation and disassembly of the beam. The rotating sleeve pushes the extension frame through a slope groove, simplifying the connection and positioning of the beam and improving operational efficiency. The quick-connect design between the clamping rod and the clamping pipe ensures a more secure and stable beam installation, avoiding potential safety hazards caused by insecure connections. The design of the clamping mechanism and the rotating sleeve can adapt to different working environments and needs, enabling flexible adjustment and fixation of the beam position.

[0021] This utility model incorporates a snap-fit ​​auxiliary mechanism. The design of components such as the annular groove, elastic plate, and extension block makes the rotating sleeve more stable during operation, preventing unnecessary displacement of the rotating sleeve due to vibration or external force, and ensuring the accuracy of the adjustment process. The combined use of the directional slope plate and the rotary push plate allows the directional slope plate to slide by rotation, fixing the rotating sleeve in the rotation direction, thus improving the stability and firmness of the snap-fit ​​system. The fixed installation of the connecting plate and the snap-fit ​​tube strengthens the connection between the snap-fit ​​tube and the fixed sleeve, ensuring the stability of the entire structure and preventing loosening due to vibration or external force. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0023] Figure 2 This is a schematic diagram of the installation of the crossbeam and longitudinal beam in this utility model;

[0024] Figure 3 This is a schematic diagram of the chain adjustment mechanism in this utility model;

[0025] Figure 4 This is a structural schematic diagram of the beam installation mechanism and the snap-fit ​​auxiliary mechanism in this utility model;

[0026] Figure 5 This is a schematic diagram of the internal structure of the beam installation mechanism and the snap-fit ​​auxiliary mechanism in this utility model.

[0027] In the diagram: 1. Crossbeam; 2. Connecting frame; 3. Adjusting frame; 4. Bolt hole; 5. Adjusting plate; 6. Hanging chain; 7. Longitudinal beam; 8. Fixing sleeve; 9. Clip-on pipe; 10. Clip-on rod; 11. Rotating sleeve; 12. Slope groove; 13. Extension frame; 14. Slot; 15. Annular groove; 16. Elastic plate; 17. Extension block; 18. Threaded ring; 19. Rotary push plate; 20. Orientation slope plate; 21. Base frame; 22. Bottom wheel; 23. Mobile hoist; 24. Hook assembly; 25. Horizontal bolt; 26. Connecting plate; 27. Slope plate. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Please see Figures 1-5 A single-beam crane includes a crossbeam 1, a chain adjustment mechanism, a beam mounting mechanism, and a locking auxiliary mechanism. The chain adjustment mechanism includes a connecting frame 2, an adjusting frame 3, bolt holes 4, adjusting plates 5, and a hanging chain 6. The connecting frame 2 is installed at the bottom end of the adjusting frame 3. Multiple sets of bolt holes 4 are provided on the side wall of the adjusting frame 3. Two sets of adjusting plates 5 are slidably installed on the adjusting frame 3. The hanging chain 6 is installed at the bottom end of the adjusting plate 5. External bolts can pass through the bolt holes 4 and the adjusting plate 5 to fix the adjusting plate 5 in the desired position. The beam mounting mechanism includes a longitudinal beam 7 and a fixing mechanism. The frame consists of a sleeve 8, a retaining tube 9, a retaining rod 10, a rotating sleeve 11, a slope groove 12, an extension frame 13, and a retaining slot 14. The fixed sleeve 8 is installed on the top end of the longitudinal beam 7. The retaining tube 9 is fixedly installed on the fixed sleeve 8. The retaining slot 14 is located on the side wall of the retaining rod 10. The rotating sleeve 11 is installed on the outer wall of the retaining tube 9 for limiting rotation. The slope groove 12 is located on the inner wall of the rotating sleeve 11. The extension frame 13 is installed on the outer wall of the retaining tube 9 for lateral sliding. The rotating sleeve 11 uses the slope groove 12 to push or pull the extension frame 13 into or away from the retaining slot 14.

[0032] In this embodiment, the adjusting frame 3 serves as a support structure, with a connecting frame 2 installed at the bottom for connection to the hook assembly 24. Multiple sets of bolt holes 4 provide adjustment for different positions. Two sets of adjusting plates 5 can slide relative to each other on the adjusting frame 3. A hanging chain 6 is installed at the bottom of the adjusting plate 5. When the position of the hanging chain 6 needs to be adjusted, firstly, the external bolt in the bolt hole 4 is removed, then the adjusting plate 5 is slid to the desired position, and then the external bolt passes through the bolt hole 4 and the adjusting plate 5 to fix the adjusting plate 5 in the new position. This design allows the hanging chain 6 to be adjusted according to different lifting objects, improving the flexibility and adaptability of lifting. The design of multiple sets of bolt holes 4 on the adjusting frame 3 also allows for high... The degree adjustment is more precise. The locking rod 10 can extend into the fixing sleeve 8 and the crossbeam 1, and into the locking tube 9 to achieve quick locking. The side wall of the locking rod 10 is provided with a locking groove 14. When the rotating sleeve 11 is rotated, the interaction between the slope groove 12 and the slope plate 27 pushes or pulls the extension frame 13, so that the extension frame 13 extends into or away from the locking groove 14 on the locking rod 10. When the extension frame 13 extends into the locking groove 14, the locking rod 10 is firmly locked in the locking tube 9, realizing a stable connection between the crossbeam 1 and the longitudinal beam 7. When the extension frame 13 exits the locking groove 14, the locking rod 10 can be pulled out from the locking tube 9, which is convenient for the crossbeam 1 to be disassembled or replaced.

[0033] The snap-fit ​​auxiliary mechanism includes an annular groove 15, an elastic plate 16, an extension block 17, a threaded ring 18, a rotary push plate 19, and a directional slope plate 20. The annular groove 15 is located at the top end of the rotating sleeve 11. Multiple sets of elastic plates 16 are installed on the outer wall of the snap-fit ​​tube 9. The extension block 17 is installed at one end of the elastic plate 16 and extends into the annular groove 15, allowing the rotating sleeve 11 to rotate stably. The threaded ring 18 is threadedly connected to the outer wall of the snap-fit ​​tube 9. The rotary push plate 19 is installed at the top end of the threaded ring 18. The directional slope plate 20 is directionally slidably installed on the outer wall of the snap-fit ​​tube 9. The rotation of the rotary push plate 19 pushes the directional slope plate 20 to slide directionally, causing the directional slope plate 20 to press against the bottom end of the rotating sleeve 11, thus fixing the rotating sleeve 11 in the rotation direction.

[0034] In this embodiment, the top of the rotating sleeve 11 is provided with an annular groove 15, and multiple sets of elastic plates 16 are installed on the outer wall of the clamping tube 9. One end of the elastic plate 16 is provided with an insertion block 17, which extends into the annular groove 15 to keep the rotating sleeve 11 stable during rotation. When the threaded ring 18 is rotated, the rotary push plate 19 pushes the directional slope plate 20 to slide in a direction, so that the directional slope plate 20 presses against the bottom of the rotating sleeve 11. The friction force keeps the rotating sleeve 11 fixed in the rotation direction, preventing the rotating sleeve 11 from loosening due to vibration or vibration generated during the lifting of heavy objects, and ensuring that the insertion frame 13 is stably inserted into the clamping groove 14.

[0035] Please see Figures 1-5 As a supplementary embodiment of a single-beam crane with a chain adjustment mechanism, beam installation mechanism, and snap-fit ​​auxiliary mechanism: A base frame 21 is installed at the bottom end of the longitudinal beam 7, and bottom wheels 22 are symmetrically installed at the bottom end of the base frame 21. A movable hoist 23 is installed on the cross beam 1, and a hook assembly 24 is installed at the bottom end of the movable hoist 23. The hook assembly 24 is connected to the connecting frame 2. A horizontal bolt 25 is installed at the top end of the adjusting plate 5, and the bottom end of the horizontal bolt 25 is in contact with the top end of the adjusting frame 3. A connecting plate 26 is installed at the bottom end of the side wall of the snap-fit ​​pipe 9, and the connecting plate 26 is fixedly installed on the side of the fixed sleeve 8. The snap-fit ​​rod 10 can extend into the fixed sleeve 8 and the cross beam 1, and extend into the snap-fit ​​pipe 9 for quick snap-fit. A slope plate 27 is installed at one end of the extending frame 13, and the slope plate 27 is slidably guided in the slope groove 12.

[0036] More specifically, by adjusting the position of the adjusting plate 5 in the chain adjustment mechanism, the position of the hanging chain 6 is determined, ensuring that the chain can adapt to different load and position requirements during lifting operations. Through the beam installation mechanism, the longitudinal beam 7 is connected to the fixed sleeve 8, and the clamping pipe 9, clamping rod 10, and other parts cooperate to complete the installation of the beam. The rotating sleeve 11 controls the extension and retraction of the extension frame 13 through the slope groove 12, realizing the accurate docking and fixation of the cross beam 1 and the longitudinal beam 7. With the cooperation of the rotating sleeve 11, the extension block 17, the threaded ring 18, and the rotary push plate 19, the clamping auxiliary mechanism further stabilizes the rotation process of the rotating sleeve 11, ensuring that all moving parts do not become loose or unstable during operation. When it is necessary to adjust the position of the chain, the position of the hanging chain 6 can be further adjusted through the adjusting plate 5 in the chain adjustment mechanism to ensure the flexibility of the lifting operation.

[0037] In summary, when the overall equipment is in use or operation: when the chain adjustment mechanism is required, it is responsible for adjusting the position of the hanging chain 6 to adapt to different lifting requirements. The adjustment frame 3 serves as a support structure, with a connecting frame 2 installed at the bottom for connection with the hook assembly 24. Multiple sets of bolt holes 4 provide adjustment for different positions. Two sets of adjustment plates 5 can slide relative to each other on the adjustment frame 3. The hanging chain 6 is installed at the bottom of the adjustment plate 5. When it is necessary to adjust the position of the hanging chain 6, first remove the external bolt in the bolt hole 4, then slide the adjustment plate 5 to the desired position, and then fix the adjustment plate 5 in the new position by passing the external bolt through the bolt hole 4 and the adjustment plate 5. This design allows the hanging chain 6 to be adjusted according to different lifting objects, improving the flexibility and adaptability of lifting. The design of multiple sets of bolt holes 4 on the adjustment frame 3 also makes the height adjustment more precise, which can meet the needs of various precision lifting operations.

[0038] When the beam installation mechanism is in operation, it connects and fixes the crossbeam 1 and the longitudinal beam 7. The locking rod 10 can extend into the fixing sleeve 8 and the crossbeam 1, and into the locking tube 9 to achieve quick locking. The side wall of the locking rod 10 is provided with a locking groove 14. When the rotating sleeve 11 is rotated, the interaction between the slope groove 12 and the slope plate 27 pushes or pulls the extension frame 13, so that the extension frame 13 extends into or away from the locking groove 14 on the locking rod 10. When the extension frame 13 extends into the locking groove 14, the locking rod 10 is firmly locked in the locking tube 9, realizing a stable connection between the crossbeam 1 and the longitudinal beam 7. When the extension frame 13 exits the locking groove 14, the locking rod 10 can be pulled out from the locking tube 9, which facilitates the disassembly or replacement of the crossbeam 1.

[0039] When the locking auxiliary mechanism is required to operate, to ensure the stability of the locking state, the top of the rotating sleeve 11 is provided with an annular groove 15, and multiple sets of elastic plates 16 are installed on the outer wall of the locking tube 9. One end of the elastic plate 16 is equipped with an insertion block 17, which extends into the annular groove 15 to keep the rotating sleeve 11 stable during rotation. When the threaded ring 18 is rotated, the rotary push plate 19 pushes the directional slope plate 20 to slide in a direction, so that the directional slope plate 20 presses against the bottom of the rotating sleeve 11. Through friction, the rotating sleeve 11 is kept fixed in the rotation direction, preventing the rotating sleeve 11 from loosening due to vibration or vibration generated during the lifting of heavy objects. This ensures that the insertion frame 13 is stably inserted into the locking groove 14, maintaining the locking state and enhancing the safety and reliability of the crane during operation.

[0040] By adjusting the position of the adjusting plate 5 in the chain adjustment mechanism, the position of the hanging chain 6 is determined, ensuring that the chain can adapt to different load and position requirements during lifting operations. Through the beam installation mechanism, the longitudinal beam 7 is connected to the fixed sleeve 8, and the clamping pipe 9, clamping rod 10, and other parts cooperate to complete the installation of the beam. The rotating sleeve 11 controls the extension and retraction of the extension frame 13 through the slope groove 12, realizing the accurate docking and fixation of the cross beam 1 and the longitudinal beam 7. With the cooperation of the rotating sleeve 11, the extension block 17, the threaded ring 18, and the rotary push plate 19, the clamping auxiliary mechanism further stabilizes the rotation process of the rotating sleeve 11, ensuring that all moving parts do not become loose or unstable during operation. When it is necessary to adjust the position of the chain, the position of the hanging chain 6 can be further adjusted through the adjusting plate 5 in the chain adjustment mechanism to ensure the flexibility of the hoisting operation.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A crane with a single beam structure, comprising a crossbeam (1), a chain adjustment mechanism, a beam installation mechanism, and a clamping auxiliary mechanism, characterized in that: The chain adjustment mechanism includes a connecting frame (2), an adjusting frame (3), bolt holes (4), an adjusting plate (5), and a hanging chain (6). The connecting frame (2) is installed at the bottom end of the adjusting frame (3). Multiple bolt holes (4) are set on the side wall of the adjusting frame (3). Two sets of adjusting plates (5) are slidably installed on the adjusting frame (3). The hanging chain (6) is installed at the bottom end of the adjusting plate (5). An external bolt can pass through the bolt holes (4) and the adjusting plate (5) to fix the adjusting plate (5) in the required position. The beam installation mechanism includes a longitudinal beam (7), a fixing sleeve ( 8) The clamping tube (9), clamping rod (10), rotating sleeve (11), slope groove (12), extension frame (13) and clamping slot (14) are installed on the top end of the longitudinal beam (7). The clamping tube (9) is fixedly installed on the fixed sleeve (8). The clamping slot (14) is set on the side wall of the clamping rod (10). The rotating sleeve (11) is limited to rotate and installed on the outer wall of the clamping tube (9). The slope groove (12) is set on the inner wall of the rotating sleeve (11). The extension frame (13) is laterally slidably installed on the outer wall of the clamping tube (9).

2. A crane with a single-beam structure according to claim 1, characterized in that: The snap-fit ​​auxiliary mechanism includes an annular groove (15), an elastic plate (16), an extension block (17), a threaded ring (18), a rotary push plate (19), and a directional slope plate (20). The annular groove (15) is located at the top end of the rotating sleeve (11). Multiple sets of elastic plates (16) are installed on the outer wall of the snap-fit ​​tube (9). The extension block (17) is installed at one end of the elastic plate (16) and extends into the annular groove (15) to make the rotating sleeve (11) rotate stably. The threaded ring (18) is threadedly connected to the outer wall of the snap-fit ​​tube (9). The rotary push plate (19) is installed at the top end of the threaded ring (18). The directional slope plate (20) is directionally slidably installed on the outer wall of the snap-fit ​​tube (9). The rotation of the rotary push plate (19) pushes the directional slope plate (20) to slide directionally.

3. A crane with a single-beam structure according to claim 1, characterized in that: The bottom end of the longitudinal beam (7) is provided with a base frame (21), and the bottom end of the base frame (21) is symmetrically provided with bottom wheels (22).

4. A crane with a single-beam structure according to claim 1, characterized in that: A movable hoist (23) is installed on the crossbeam (1), and a hook assembly (24) is installed at the bottom end of the movable hoist (23), and the hook assembly (24) is connected to the connecting frame (2).

5. A crane with a single-beam structure according to claim 1, characterized in that: The top end of the adjusting plate (5) is provided with a horizontal bolt (25), and the bottom end of the adjusting bracket (3) of the horizontal bolt (25) is in contact with the support.

6. A crane with a single-beam structure according to claim 1, characterized in that: A connecting plate (26) is installed at the bottom of the side wall of the card tube (9), and the connecting plate (26) is fixedly installed on the side of the fixing sleeve (8).

7. A crane with a single-beam structure according to claim 1, characterized in that: The snap-fit ​​rod (10) can extend into the fixing sleeve (8) and the crossbeam (1), and extend into the snap-fit ​​tube (9) to cooperate with the quick snap-fit ​​setting.

8. A crane with a single-beam structure according to claim 1, characterized in that: One end of the extension frame (13) is equipped with a slope plate (27), and the slope plate (27) is set in the slope groove (12) in conjunction with the sliding guide.

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