Movable layered three-dimensional greening planting module

Abstract

The embodiment of the utility model provides a movable layered three-dimensional greening planting module, and relates to the technical field of urban greening. The movable layered three-dimensional greening planting module comprises at least two frames which can be connected with each other, at least two layers of planting assemblies and an adjusting assembly, the planting assembly comprises a supporting frame and a planting groove body; the supporting frame is rotationally connected with the frame, and the adjusting assembly is connected with the frame and the planting assembly and used for adjusting the inclination angle of the planting assembly. The multiple modules can be flexibly spliced through the frame, and the greening requirements of different areas and scenes are met. The modular design not only simplifies the construction process, but also can adapt to complex spatial layout, and avoids the tedious operation of disassembling and changing the ground on a large scale in the traditional ground greening construction.

Description

Technical Field

[0001] The utility model relates to the technical field of urban greening, in particular to a movable layered three-dimensional greening planting module. Background Art

[0002] Urban greening is a crucial component of modern urban development. It not only improves the urban ecological environment, regulates the climate, and absorbs harmful gases, but also enhances the city's aesthetics and residents' quality of life. With the acceleration of urbanization, the construction of large-scale hardened surfaces and high-rise buildings has led to a decrease in available land for greening. To address this challenge, various greening technologies, such as rooftop greening and three-dimensional greening, have emerged. However, these methods still face many limitations in their application.

[0003] Currently, most greening projects still rely on direct planting on the ground. This traditional method requires large tracts of land and is more suitable for new construction. However, re-greening existing urban areas presents numerous challenges, such as the need to demolish existing ground structures and renovate buildings. This leads to long construction periods, high costs, and the significant investment of manpower and resources. Furthermore, the complexity of construction can cause inconvenience to the surrounding environment and residents. Utility Model Content

[0004] According to an embodiment of the present invention, a movable layered three-dimensional greening planting module is provided to solve the problems raised by the above-mentioned existing background technology.

[0005] In the first aspect of the present invention, a movable layered three-dimensional greening planting module is provided, comprising: at least two interconnected frames, at least two layers of planting components and an adjustment component; the planting component comprises a support frame and a planting trough; the support frame is rotatably connected to the frame, and the adjustment component is connected to the frame and the planting component for adjusting the inclination angle of the planting component.

[0006] Preferably, the frame includes a rectangular frame, two first support rods, two second support rods, a top frame and four universal wheels; the bottom surface of the rectangular frame is connected to the four universal wheels, the two first support rods and the two second support rods are fixedly connected to the rectangular frame respectively, and the top frame is fixedly installed on the upper ends of the two first support rods and the two second support rods; the planting component is rotatably installed between the two first support rods, and the adjustment component is installed on the second support rod.

[0007] Preferably, the adjustment assembly includes two sliding parts, a crossbeam, a driving rod, two mounting cavities, two clamping blocks, two springs, two connecting rods and two shifting blocks; the two mounting cavities are respectively fixedly mounted on the two ends of the crossbeam, the two sliding parts are respectively fixedly connected to the two mounting cavities, the two second support rods are respectively provided with slideways, the two sliding parts are respectively slidably mounted in the two slideways, the number of the driving rods is multiple, and the driving rods are connected to the sliding parts, the side of the support frame is provided with a driving groove for the driving rod to extend into, the driving rod is slidably connected to the driving groove, the clamping block The block is slidably installed in the installation cavity, and the block can extend out of the installation cavity, and the connecting rod is fixedly connected to the block, and a spring seat is provided inside the installation cavity, and the spring is sleeved on the connecting rod, one end of the spring is connected to the block, and the other end of the spring is connected to the spring seat, and a plurality of slots for the block to extend into are provided in the slideway of the second support rod, and the spring provides elastic force for the block to extend into the slot, and a strip notch is provided on the upper wall of the installation cavity, and the shift block is fixedly connected to the connecting rod, and the shift block passes through the strip notch and is slidably connected to the strip notch.

[0008] Preferably, a mounting shaft is rotatably connected to the support frame, and the mounting shaft is rotatably installed between the two first support rods.

[0009] Preferably, a bearing net is provided on the support frame.

[0010] Preferably, a limiting flange is provided on the support frame for limiting the planting trough body.

[0011] Preferably, a roller is provided at the bottom of the planting trough body.

[0012] Preferably, the frame also includes a connecting assembly, a connecting beam is connected between the first support rod and the second support rod, the connecting assembly includes a first screw, a connecting piece and a second screw, the first screw and the second screw are respectively threadedly connected to the connecting piece, a circular ring portion is provided at one end of the first screw away from the connecting piece, the connecting beam passes through the circular ring portion, and a hook is provided at one end of the second screw away from the connecting piece.

[0013] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0014] The frame of this utility model features modular connectivity, allowing multiple modules to be flexibly connected to meet the greening needs of different areas and scenarios. This modular design not only simplifies the construction process but also adapts to complex spatial layouts, avoiding the tedious large-scale demolition and modification required in traditional ground-based greening construction. This utility model achieves three-dimensional greening through at least two layers of planting components. The support frame provides stable support, while the planting troughs house the plants, fully utilizing vertical space. This three-dimensional planting method achieves higher green coverage within a limited space, addressing the large flat space requirements of traditional ground-based greening. An adjustment component connects the frame and planting components, allowing for flexible adjustment of the support frame's tilt angle, which in turn changes the planting angle of the planting troughs. This angle adjustment feature allows for optimized placement based on the growth requirements of different plants (such as height and light exposure), improving plant growth efficiency. Furthermore, the tilted design enhances the three-dimensionality and aesthetics of the green landscape, adapting to diverse design requirements. It can be easily moved, disassembled, or reassembled according to construction needs. This feature significantly reduces the interference of traditional greening construction on existing buildings and ground facilities. It is particularly suitable for greening renovation in built-up areas, overcoming the problems of large manpower and high costs required in traditional construction.

[0015] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features, advantages and aspects of the various embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown;

[0018] Figure 2 An exploded view of a movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown;

[0019] Figure 3 A schematic diagram of the three-dimensional structure of the adjustment assembly of the movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown;

[0020] Figure 4 A schematic cross-sectional view of the mounting cavity of a movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown;

[0021] Figure 5 A partial cross-sectional structural diagram of a second support rod and an adjustment assembly of a movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown;

[0022] Figure 6 An exploded view of a planting assembly of a movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown;

[0023] Figure 7 A schematic diagram of the three-dimensional structure of the connection assembly and the connection beam of the movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown;

[0024] Figure 8 for Figure 3 A in the middle is an enlarged schematic diagram;

[0025] Figure 9 A structural schematic diagram showing the splicing state of a movable layered three-dimensional greening planting module according to an embodiment of the present utility model is shown.

[0026] Description of Reference Numerals

[0027] 1-frame, 11-rectangular frame, 12-first support rod, 13-second support rod, 131-slide, 132-card slot, 14-top frame, 15-universal wheel, 16-connecting assembly, 161-first screw, 1611-circular ring, 162-connecting piece, 163-second screw, 1631-hook, 17-connecting beam, 2-implantation assembly, 21-support frame, 211-drive groove, 212-bearing net, 213-installation shaft, 214-limiting flange, 22-implantation trough body, 221-roller, 3-adjustment assembly, 31-sliding part, 32-crossbeam, 33-drive rod, 34-installation cavity, 341-spring seat, 342-strip notch, 35-block, 36-spring, 37-connecting rod, 38-dial block. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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 making creative efforts are within the scope of protection of the present invention.

[0029] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0030] like Figures 1 to 9 As shown, the present invention provides a movable, layered, three-dimensional greening planting module, comprising at least two interconnected frames 1, at least two layers of planting assemblies 2, and an adjustment assembly 3. The planting assembly 2 comprises a support frame 21 and a planting trough 22; the support frame 21 is rotatably connected to the frame 1; the adjustment assembly 3 is connected to the frame 1 and the planting assembly 2, and is used to adjust the inclination angle of the planting assembly 2 to meet different greening needs.

[0031] During use, the number of planting modules can be determined according to actual construction needs, and multiple planting modules can be connected to each other through the frame 1, such as Figure 9 As shown, Figure 9 This is a schematic diagram of the structure after two planting modules are spliced ​​together. The planting modules can be combined through the existing connection structure to ensure overall stability while also having flexible scalability to adapt to the greening needs of different scenarios.

[0032] Plants are planted in the planting trough 22, whose dimensions and structural design accommodate a wide variety of plant types. The tilt angle of the support frame 21 can be adjusted using the adjustment assembly 3 to meet the specific needs of the construction site. The support frame 21 pivots to support the planting trough 22. The adjustment assembly 3 tilts the support frame 21, thereby simultaneously tilting the planting trough 22 and the plants within it.

[0033] The tilted design not only enhances the overall aesthetics of the green landscape, but also allows for optimization of planting angles based on plant species. For example, different plants may have different growth heights or light requirements, and the angle of the planting trough 22 can be adjusted to provide a suitable growth environment for each plant, thereby achieving both functionality and decorativeness.

[0034] The layered design and angle adjustment capabilities of these planting modules enable flexible layout of greening modules. The assembled modules can be used for both large-scale greening and smaller spaces. The modular and angle-adjustable structure simplifies and streamlines construction, minimizing the impact of traditional greening on the existing building environment while enhancing the effectiveness and applicability of three-dimensional greening.

[0035] The frame 1 of the present invention has a modular connection function, and multiple modules can be flexibly spliced ​​through the frame 1 (such as Figure 9As shown in the figure, it meets the greening requirements of different areas and scenarios. This modular design not only simplifies the construction process but also can adapt to complex spatial layouts, avoiding the cumbersome operations of large-scale demolition and reconstruction of the ground in traditional ground greening construction. The utility model realizes three-dimensional greening through at least two layers of planting components 2, where the support frame 21 provides a stable support function, and the planting trough 22 is used to accommodate greening plants, making full use of the vertical space. This three-dimensional planting method can achieve a higher greening coverage rate in a limited space, solving the problem of large demand for planar space in traditional ground greening. The adjustment component 3 connects the frame 1 and the planting component 2, and can flexibly adjust the inclination angle of the support frame 21, thereby changing the planting angle of the planting trough 22. This angle adjustment function can be optimized according to the growth requirements of different plants (such as height, light direction, etc.), improving the growth efficiency of plants. At the same time, the inclined design can also enhance the three-dimensional sense and beauty of the greening landscape, adapting to different design requirements. It can be easily moved, disassembled or reassembled according to construction needs. This feature significantly reduces the interference of traditional greening construction to existing buildings and ground facilities, especially suitable for greening renovation of built-up areas, overcoming the problems of requiring a large amount of manpower and high costs in traditional construction.

[0036] In this embodiment, the frame 1 includes the following parts: a rectangular frame 11, two first support rods 12, two second support rods 13, a top frame 14, and four universal wheels 15. The rectangular frame 11 serves as the basic structure of the frame 1, and its bottom surface is connected to the four universal wheels 15 by a fixed connection. The universal wheels 15 provide the moving ability of the frame 1, facilitating the flexible layout and adjustment of the module at the construction site. Among them, the universal wheels 15 are locking universal wheels.

[0037] The two first support rods 12 and the two second support rods 13 are both vertically and fixedly installed at the four corners of the rectangular frame 11. Among them, the upper ends of the first support rod 12 and the second support rod 13 are respectively connected to the top frame 14. The top frame 14 is in a C shape, and the notch is used to operate the adjustment component 3. The planting trough 22 is fixedly installed in the support frame 21 and is used to accommodate greening plants. Its inclination angle can be adjusted as the support frame 21 rotates to meet the growth requirements of different plants or the requirements of greening design.

[0038] The adjustment component 3 is installed on the two second support rods 13. The adjustment component 3 is used to control the rotation angle of the support frame 21, thereby adjusting the inclination state of the planting trough 22.

[0039] The support frame 21 is rotatably installed between the two first support rods 12, facilitating angle adjustment.

[0040] In this embodiment, the adjustment component 3 includes two sliding parts 31, a crossbeam 32, a driving rod 33, two mounting cavities 34, two blocking blocks 35, two springs 36, two connecting rods 37 and two shifting blocks 38; the two mounting cavities 34 are respectively fixedly mounted at both ends of the crossbeam 32, the two sliding parts 31 are respectively fixedly connected to the two mounting cavities 34, the two second support rods 13 are respectively provided with slideways 131, the two sliding parts 31 are respectively slidably mounted in the two slideways 131, the number of the driving rods 33 is multiple, and the driving rods 33 are connected to the sliding parts 31, the side of the support frame 21 is provided with a driving groove 211 for the driving rod 33 to extend into, and the driving rod 33 slides in the driving groove 211 The locking block 35 is slidably installed in the mounting cavity 34, and the locking block 35 can extend out of the mounting cavity 34. The connecting rod 37 is fixedly connected to the locking block 35. A spring seat 341 is provided inside the mounting cavity 34, and the spring 36 is sleeved on the connecting rod 37. One end of the spring 36 is connected to the locking block 35, and the other end of the spring 36 is connected to the spring seat 341. A plurality of slots 132 for the locking block 35 to extend into are provided in the slideway 131 of the second support rod 13. The spring 36 provides the elastic force for the locking block 35 to extend into the slot 132. A strip notch 342 is provided on the upper wall of the mounting cavity 34. The shift block 38 is fixedly connected to the connecting rod 37. The shift block 38 passes through the strip notch 342 and is slidably connected to the strip notch 342.

[0041] Furthermore, in this embodiment, there are four planting assemblies 2. During use, the user grasps the mounting cavity 34 with both hands and uses their thumbs to push the two shifting blocks 38. The shifting blocks 38 slide within the strip-shaped notches 342, simultaneously pulling the retaining blocks 35 connected to the connecting rod 37 toward the interior of the mounting cavity 34. At this point, the spring 36 is compressed, disengaging the retaining blocks 35 from the retaining slots 132 within the slideway 131 of the second support rod 13, allowing the mounting cavity 34 and its connected components to slide freely up and down.

[0042] When the user pulls up or pushes down the installation cavity 34 , the installation cavity 34 drives the sliding portion 31 to move up and down along the slideway 131 .

[0043] The movement of the sliding portion 31 directly affects the position of the crossbeam 32 , and the sliding of the driving rod 33 in the driving slot 211 changes the tilt angle of the support frame 21 .

[0044] Downward adjustment: When the sliding portion 31 moves downward, the driving rod 33 pushes the support frame 21 to rotate around its rotation connection point, so that the side of the support frame 21 away from the first support rod 12 tilts downward.

[0045] Upward adjustment: When the sliding portion 31 moves upward, the driving rod 33 pulls the supporting frame 21 toward a horizontal state to meet the needs of plant planting or landscape design.

[0046] After the sliding portion 31 has moved to the desired position, the user removes the external force applied to the shift block 38. At this point, the restoring force of the spring 36 pushes the clamping block 35 back out of the mounting cavity 34 and into the retaining groove 132 within the slideway 131, securing the mounting cavity 34. Once the clamping block 35 is secured, the mounting cavity 34 and its connected sliding portion 31 cannot slide further, ensuring the stable position of the crossbeam 32 and drive rod 33. The drive rod 33 maintains support for the support frame 21, preventing it from rotating, thereby fixing the tilt angle of the planting trough 22.

[0047] After adjustment is complete, the support frame 21 is stably maintained at the preset angle through the structure between the drive rod 33 and the first support rod 12, ensuring that the plants and loads in the planting trough 22 are not affected by tilting or loosening. At the same time, the overall structure can adapt to external vibrations or wind forces and maintain stability.

[0048] In this embodiment, the support frame 21 is flexibly adjusted by a rotatably connected mounting shaft 213. Specifically, the mounting shaft 213 is fixed to the support frame 21 and rotatably mounted between the two first support rods 12, allowing the support frame 21 to be angularly adjusted around the mounting shaft 213 to adapt to different greening needs.

[0049] In this embodiment, to reduce the weight of the overall structure, a load-bearing net 212 is provided on the support frame 21. The load-bearing net 212 effectively improves the stability of the support frame 21 itself. The load-bearing net 212 adopts a lightweight design and has a high load-bearing capacity. It can support the planting trough 22 and the plants therein, while reducing the overall weight of the module and facilitating installation and maintenance operations.

[0050] In this embodiment, to ensure the stability of the planting trough body 22 when the support frame 21 is tilted, a limiting flange 214 is provided on the support frame 21. The limiting flange 214 limits the edge of the planting trough body 22 to prevent it from accidentally sliding out or falling off when the support frame 21 is tilted, thereby improving the safety and reliability of the overall structure.

[0051] In this embodiment, rollers 221 are provided at the bottom of the planting trough 22. With the aid of rollers 221, the user can easily pull the planting trough 22 out of the support frame 21. This design significantly simplifies the installation, maintenance, and replacement of the planting trough 22, improving its convenience and efficiency.

[0052] In this embodiment, by providing a connecting assembly 16, flexible splicing and distance adjustment between the frames 1 are achieved. The connecting assembly 16 is composed of a first screw 161, a connecting piece 162 and a second screw 163. The first screw 161 and the second screw 163 are respectively connected to the connecting piece 162 through a threaded structure, which is convenient for telescopic adjustment. Among them, the distal end of the first screw 161 is provided with a circular ring portion 1611, which is used to be fixedly connected to the connecting beam 17. The connecting beam 17 is fixed between the first support rod 12 and the second support rod 13, which plays a role in strengthening the structural stability of the frame 1. The distal end of the second screw 163 is provided with a hook 1631, which is used to be mounted on the connecting beam 17 of the adjacent frame 1 to achieve splicing between the two frames 1.

[0053] When splicing two frames 1, place the two frames 1 next to each other and manually adjust the initial position to ensure that the connecting beams 17 of the adjacent frames 1 are relatively parallel. Hang the hook 1631 of the connecting component 16 on the connecting beam 17 of the other frame 1 to preliminarily complete the connection between the frames 1.

[0054] Since there may be slight distance errors or deviations in the placement of frame 1, precise adjustment can be made in the following ways:

[0055] Adjusting the length of the second screw rod 163 : By rotating the second screw rod 163 , the length of the second screw rod extending beyond the connecting member 162 is changed, thereby adjusting the relative position of the hook 1631 .

[0056] Adjusting the length of the first screw rod 161 : By rotating the connecting member 162 , the extension length of the first screw rod 161 relative to the connecting member 162 is changed, thereby further optimizing the total length of the connecting assembly 16 .

[0057] Through the above two methods, the total length of the connecting assembly 16 can be precisely adjusted to adapt to different distances between adjacent frames 1.

[0058] When the length of the connecting assembly 16 is adjusted to a suitable position, ensure that the hook 1631 is firmly hooked to the connecting beam 17 of the adjacent frame 1, and the annular portion 1611 of the first screw 161 is firmly connected to the connecting beam 17 of the current frame 1, and the splicing of the two frames 1 is completed.

[0059] The design of the connecting assembly 16 in this embodiment enables fast and efficient splicing between frames 1. The threaded adjustment function of the first and second screws 161, 163 allows for adapting to the actual distance between different frames 1, eliminating the precise placement requirements of traditional splicing methods. Furthermore, the design of the hook 1631 and the ring portion 1611 makes the splicing process simple and stable, greatly enhancing the ease of installation and adaptability of the modular splicing landscaping system.

[0060] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. The movable layered three-dimensional greening planting module is characterized by: include: At least two interconnected frames (1), at least two layers of planting components (2), and an adjustment component (3); the planting component (2) comprises a support frame (21) and a planting trough (22); the support frame (21) is rotatably connected to the frame (1), and the adjustment component (3) is connected to the frame (1) and the planting component (2) for adjusting the inclination angle of the planting component (2).

2. The movable layered three-dimensional greening planting module according to claim 1 is characterized in that: The frame (1) comprises a rectangular frame (11), two first support rods (12), two second support rods (13), a top frame (14) and four universal wheels (15); the bottom surface of the rectangular frame (11) is connected to the four universal wheels (15), the two first support rods (12) and the two second support rods (13) are fixedly connected to the rectangular frame (11), respectively, and the top frame (14) is fixedly mounted on the upper ends of the two first support rods (12) and the two second support rods (13); the planting assembly (2) is rotatably mounted between the two first support rods (12), and the adjusting assembly (3) is mounted on the second support rods (13).

3. The movable layered three-dimensional greening planting module according to claim 2 is characterized in that: The adjustment assembly (3) includes two sliding parts (31), a crossbeam (32), a driving rod (33), two installation cavities (34), two clamping blocks (35), two springs (36), two connecting rods (37) and two shifting blocks (38); the two installation cavities (34) are respectively fixedly installed at the two ends of the crossbeam (32); the two sliding parts (31) are respectively fixedly connected to the two installation cavities (34); the two second support rods (13) are respectively provided with a slideway (131); the two sliding parts (31) are respectively slidably installed in the two slideways (131); the number of the driving rods (33) is multiple, and the driving rods (33) are connected to the sliding parts (31); the side of the support frame (21) is provided with a driving groove (211) for the driving rod (33) to extend into; the driving rod (33) is slidably connected to the driving groove (211); the clamping block (35) is slidably installed in the two slideways (131); In the installation cavity (34), the block (35) can extend out of the installation cavity (34), the connecting rod (37) is fixedly connected to the block (35), a spring seat (341) is provided inside the installation cavity (34), the spring (36) is sleeved on the connecting rod (37), one end of the spring (36) is connected to the block (35), and the other end of the spring (36) is connected to the spring seat (341), and the second support rod ( 13) is provided with a plurality of slots (132) for the block (35) to extend into, the spring (36) provides elastic force for the block (35) to extend into the slot (132), the upper wall of the mounting cavity (34) is provided with a strip-shaped notch (342), the shift block (38) is fixedly connected to the connecting rod (37), and the shift block (38) passes through the strip-shaped notch (342) and is slidably connected to the strip-shaped notch (342).

4. The movable layered three-dimensional greening planting module according to claim 2 is characterized in that: A mounting shaft (213) is rotatably connected to the support frame (21), and the mounting shaft (213) is rotatably mounted between the two first support rods (12).

5. The movable layered three-dimensional greening planting module according to claim 1 is characterized in that: A bearing net (212) is provided on the supporting frame (21).

6. The movable layered three-dimensional greening planting module according to claim 1 is characterized in that: A limiting flange (214) is provided on the support frame (21) for limiting the position of the planting trough body (22).

7. The movable layered three-dimensional greening planting module according to claim 1 is characterized in that: A roller (221) is provided at the bottom of the planting trough body (22).

8. The movable layered three-dimensional greening planting module according to claim 2 is characterized in that: The frame (1) further comprises a connecting assembly (16), wherein a connecting beam (17) is connected between the first support rod (12) and the second support rod (13), and the connecting assembly (16) comprises a first screw rod (161), a connecting member (162) and a second screw rod (163), wherein the first screw rod (161) and the second screw rod (163) are respectively threadedly connected to the connecting member (162), an annular portion (1611) is provided at one end of the first screw rod (161) away from the connecting member (162), and the connecting beam (17) passes through the annular portion (1611), and a hook (1631) is provided at one end of the second screw rod (163) away from the connecting member (162).

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