Tree supporting device for forestry planting

Abstract

The utility model relates to the technical field of forestry engineering, in particular to a tree supporting device for forestry planting, which comprises a first arc-shaped plate and a second arc-shaped plate, a connecting component is mounted between the first arc-shaped plate and the second arc-shaped plate, and an extension component is mounted on the first arc-shaped plate and the second arc-shaped plate. The fixing assemblies are installed at the bottoms of the first arc-shaped plate and the second arc-shaped plate correspondingly, when the device needs to be fixed to the ground, fixing thorns are inserted into the ground firstly, then the fixing thorns are lightly lifted upwards, meanwhile, third threaded columns are rotated, the third threaded columns rotate to drive auxiliary blocks to rotate, the auxiliary blocks stretch out, the stress area of the fixing thorns and the ground is increased, and the fixing thorns are fixed to the ground. And finally, a second hexagon nut is rotated, so that the second hexagon nut is in contact with a fixing plate, movement of a third threaded column is limited, the special conditions such as heavy rain or fierce wind can be effectively resisted, and the fixing thorns can be fixed to the soft ground more firmly.

Description

Technical Field

[0001] The utility model relates to the technical field of forestry engineering, in particular to a tree supporting device for forestry planting. Background Art

[0002] As is well known, during forestry planting, it is necessary to straighten and support trees to prevent them from falling due to the influence of wind or growing obliquely, which affects their aesthetics. Especially newly planted trees have shallow roots. If not fixed, it is very easy for the trees to be blown down by the wind or grow crooked. In order to ensure the survival rate and vertical growth of transplanted trees, it is often necessary to install a tree straightening and fixing frame.

[0003] When the existing tree supporting device for forestry planting is in use, it is generally fixed to the ground using fixing spikes. However, using only fixing spikes for fixation may be affected in special situations, such as heavy rain, strong wind, or soft ground. Therefore, a tree supporting device for forestry planting is needed. Summary of the Utility Model

[0004] The utility model provides a tree supporting device for forestry planting in view of the technical problems existing in the prior art.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: A tree supporting device for forestry planting, including a first arc-shaped plate and a second arc-shaped plate, further including:

[0006] A connection component, which is installed between the first arc-shaped plate and the second arc-shaped plate;

[0007] An extension component, which is installed on the first arc-shaped plate and the second arc-shaped plate for increasing the contact area between the tree supporting device for forestry planting and the tree;

[0008] A fixing component, each fixing component is respectively installed at the bottom of the first arc-shaped plate and the second arc-shaped plate for fixing the tree supporting device for forestry planting to the ground. The fixing component includes:

[0009] Fixing rings, each fixing ring is respectively fixedly connected to the bottom of the first arc-shaped plate and the second arc-shaped plate;

[0010] Fixing spikes, each fixing spike is respectively threadedly connected to the inner wall of the corresponding fixing ring;

[0011] An auxiliary component, which is installed on the fixing spike for increasing the fixing strength of the fixing spike. The auxiliary component includes:

[0012] Placement grooves, each of the placement grooves is respectively opened on both sides of the corresponding fixed thorn;

[0013] Auxiliary blocks, each of the auxiliary blocks is respectively rotatably connected to the inner wall of the placement groove through a shaft;

[0014] Round holes, the round holes are opened on the fixed thorn, and the round holes communicate with the placement grooves;

[0015] Square grooves, each of the square grooves is respectively opened on the fixed thorn, and the square grooves communicate with the round holes and the placement grooves;

[0016] First connection blocks, each of the first connection blocks is respectively fixedly connected to the side surface of the corresponding auxiliary block;

[0017] First rotating rods, each of the first rotating rods is respectively rotatably connected to the corresponding first connection block through a shaft, and the first rotating rods are rotatably connected to each other through a shaft;

[0018] Moving plates, the moving plates are rotatably connected between the first rotating rods, and the moving plates are slidably connected to the inner wall of the round holes;

[0019] Limit components, the limit components are installed on the fixed thorns for limiting the movement of the moving plates.

[0020] Preferably, the connection components include:

[0021] Mounting plates, each of the mounting plates is respectively fixedly connected to both sides of the first arc-shaped plate and the second arc-shaped plate;

[0022] Mounting holes, each of the mounting holes is respectively opened on the corresponding mounting plate;

[0023] First threaded rods, each of the first threaded rods is respectively threadedly connected between the corresponding mounting holes;

[0024] Hexagonal baffles, each of the hexagonal baffles is respectively fixedly connected to one end of the corresponding first threaded rod;

[0025] First hexagonal nuts, each of the first hexagonal nuts is respectively threadedly connected to the other end of the corresponding first threaded rod.

[0026] Furthermore, the extension components include:

[0027] Push-pull plates, each of the push-pull plates is respectively slidably connected to the first arc-shaped plate and the second arc-shaped plate;

[0028] Chute grooves, each of the chute grooves is respectively opened on the corresponding first arc-shaped plate and the second arc-shaped plate;

[0029] Sliders, each of the sliders is slidably connected to the inner wall of the corresponding chute, and the tops of the sliders are fixedly connected to the bottoms of the corresponding push-pull plates;

[0030] A second threaded rod, the second threaded rod is rotatably connected to the push-pull plate, and one end of the second threaded rod passes through the first arc-shaped plate and the second arc-shaped plate;

[0031] A first handle, the first handle is fixedly connected to one end of the second threaded rod;

[0032] A lifting plate, the lifting plate is slidably connected to the first arc-shaped plate and the second arc-shaped plate;

[0033] Limit grooves, each of the limit grooves is opened on both sides of the first arc-shaped plate and the second arc-shaped plate;

[0034] Limit blocks, each of the limit blocks is slidably connected to the inner wall of the corresponding limit groove, and the limit blocks are fixedly connected to the lifting plate.

[0035] On the basis of the foregoing solution, the limiting component includes:

[0036] A fixing plate, the fixing plate is fixedly connected to one end of the fixing thorn;

[0037] A notch, the notch is opened on the fixing thorn;

[0038] A sliding column, the sliding column is fixedly connected to the moving plate, and the sliding column is slidably connected to the inner wall of the notch;

[0039] A third threaded column, the third threaded column is rotatably connected to the sliding column, and one end of the third threaded column passes through the fixing plate and is slidably connected to the fixing plate;

[0040] A second hexagon nut, the second hexagon nut is threadedly connected to the third threaded column, and the second hexagon nut is in contact with the fixing plate.

[0041] Beneficial effects:

[0042] When the tree support device for forestry planting needs to be fixed on the ground, first insert the fixing spikes into the ground, then gently lift the fixing spikes upward while rotating the third threaded column. The rotation of the third threaded column drives the sliding column to move, the movement of the sliding column drives the moving plate to move, the movement of the moving plate drives the first rotating rod to rotate, the rotation of the first rotating rod drives the first connecting block to rotate, and the rotation of the first connecting block drives the auxiliary block to rotate. Extend the auxiliary block to increase the force-bearing area between the fixing spikes and the ground, making the fixing spikes more firmly inserted into the ground. Finally, rotate the second hex nut so that the second hex nut contacts the fixing plate, restricting the movement of the third threaded column. This can not only effectively withstand special situations such as heavy rain or strong winds, but also make the fixing spikes more firmly fixed on soft ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic side view structure diagram of the present utility model;

[0044] Figure 2 is a schematic structure diagram of the lifting plate of the present utility model;

[0045] Figure 3 is a schematic structure diagram of the fixing spikes of the present utility model;

[0046] Figure 4 is a schematic structure diagram of the moving plate of the present utility model;

[0047] Figure 5 For the present utility model Figure 3 is a partially enlarged schematic structure diagram at A in;

[0048] Figure 6 For the present utility model Figure 4 is a partially enlarged schematic structure diagram at B in.

[0049] In the drawings, the list of components represented by each reference numeral is as follows:

[0050] 1, first arc-shaped plate; 2, second arc-shaped plate; 3, mounting plate; 4, first threaded rod; 5, hexagonal baffle; 6, first hex nut; 7, push-pull plate; 8, slider; 9, second threaded rod; 10, first handle; 11, lifting plate; 12, limit block; 13, fixing ring; 14, fixing spikes; 15, auxiliary block; 16, first connecting block; 17, first rotating rod; 18, moving plate; 19, fixing plate; 20, sliding column; 21, third threaded column; 22, second hex nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model.

[0052] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0053] In the description of the present utility model, the term "for example" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "for example" in the present utility model is not necessarily construed as being more preferred or having more advantages than other embodiments. The following description is provided to enable any person skilled in the art to make and use the present utility model. In the following description, details are set forth for the purpose of explanation. It should be understood that those skilled in the art can recognize that the present utility model can be practiced without these specific details. In other instances, well-known structures and processes are not described in detail to avoid unnecessary details from obscuring the description of the present utility model. Therefore, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0054] Refer to Figures 1 to 6, A tree-supporting device for forestry planting, comprising a first arc-shaped plate 1 and a second arc-shaped plate 2. A connecting component is installed between the first arc-shaped plate 1 and the second arc-shaped plate 2. Each mounting plate 3 in the connecting component is fixedly connected to both sides of the first arc-shaped plate 1 and the second arc-shaped plate 2 respectively. Each mounting hole is respectively opened on the corresponding mounting plate 3. Each first threaded rod 4 is respectively threadedly connected between the corresponding mounting holes. Each hexagonal baffle 5 is fixedly connected to one end of the corresponding first threaded rod 4. Each first hexagonal nut 6 is respectively threadedly connected to the other end of the corresponding first threaded rod 4. An extension component is installed on the first arc-shaped plate 1 and the second arc-shaped plate 2, and is used to increase the contact area between the tree-supporting device for forestry planting and the tree. By increasing the contact area between the tree-supporting device for forestry planting and the tree, the force exerted on the tree can be more effectively dispersed, thereby improving the supporting force of the tree-supporting device for forestry planting on the tree. This is particularly important for newly planted trees because their root systems are not fully developed in the initial growth stage and are prone to tilting or lodging under external forces such as wind. When the contact area between the tree-supporting device for forestry planting and the tree increases, the pressure exerted on the tree will decrease, which helps to reduce the compression and damage to the tree bark and avoid adverse effects on the growth of the tree. Each push-pull plate 7 in the extension component is respectively slidably connected to the first arc-shaped plate 1 and the second arc-shaped plate 2. Each chute is respectively opened on the corresponding first arc-shaped plate 1 and the second arc-shaped plate 2. Each slider 8 is respectively slidably connected to the inner wall of the corresponding chute, and the top of each slider 8 is fixedly connected to the bottom of the corresponding push-pull plate 7. A second threaded rod 9 is rotatably connected to the push-pull plate 7, and one end of the second threaded rod 9 passes through the first arc-shaped plate 1 and the second arc-shaped plate 2. A first handle 10 is fixedly connected to one end of the second threaded rod 9. A lifting plate 11 is slidably connected to the first arc-shaped plate 1 and the second arc-shaped plate 2. Each limiting groove is respectively opened on both sides of the first arc-shaped plate 1 and the second arc-shaped plate 2. Each limiting block 12 is respectively slidably connected to the inner wall of the corresponding limiting groove, and each limiting block 12 is fixedly connected to the lifting plate 11. Each fixing component is respectively installed at the bottom of the first arc-shaped plate 1 and the second arc-shaped plate 2, and is used to fix the tree-supporting device for forestry planting to the ground. Each fixing ring 13 in the fixing component is fixedly connected to the bottom of the first arc-shaped plate 1 and the second arc-shaped plate 2 respectively. Each fixing thorn 14 is respectively threadedly connected to the inner wall of the corresponding fixing ring 13. An auxiliary component is installed on the fixing thorn 14 and is used to increase the fixing strength of the fixing thorn 14.

[0055] The first arc-shaped plate 1 and the second arc-shaped plate 2 serve as the main support structures of the tree-supporting device for forestry planting. Through their arc-shaped design, they can closely fit the tree trunks to provide stable support. The mounting plates 3 are respectively fixedly connected to both sides of the first arc-shaped plate 1 and the second arc-shaped plate 2 to provide support for the mounting holes. The mounting holes are opened on the mounting plates 3 for mounting the first threaded rods 4. The first threaded rods 4 are threadedly connected between the corresponding mounting holes to achieve the firm connection of the first arc-shaped plate 1 and the second arc-shaped plate 2. The hexagonal baffles 5 and the first hexagonal nuts 6 are respectively fixedly connected to both ends of the first threaded rods 4 to prevent the first threaded rods 4 from loosening and increase the stability of the connection. The push-pull plate 7 is slidably connected to the first arc-shaped plate 1 and the second arc-shaped plate 2. The sliding of the push-pull plate 7 is realized through the cooperation of the sliding grooves and the sliders 8. The sliding grooves are opened on the first arc-shaped plate 1 and the second arc-shaped plate 2 to provide a sliding track for the sliders 8. The sliders 8 are slidably connected to the inner walls of the sliding grooves. The tops of the sliders 8 are fixedly connected to the bottom of the push-pull plate 7 to realize the movement of the push-pull plate 7. The second threaded rod 9 is rotatably connected to the push-pull plate 7, and one end of it passes through the first arc-shaped plate 1 and the second arc-shaped plate 2. By rotating, the position of the push-pull plate 7 can be adjusted, thereby increasing the contact area with the tree. The first handle 10 is fixedly connected to one end of the second threaded rod 9 to facilitate the user to rotate the threaded rod. The lifting plate 11 is slidably connected to the first arc-shaped plate 1 and the second arc-shaped plate 2, and the height of the lifting plate 11 can be adjusted as needed. The limiting grooves are opened on both sides of the first arc-shaped plate 1 and the second arc-shaped plate 2 to provide a sliding track for the limiting blocks 12. The limiting blocks 12 are slidably connected to the inner walls of the corresponding limiting grooves and are fixedly connected to the lifting plate 11 to limit the movement range of the lifting plate 11. The fixing rings 13 are fixedly connected to the bottoms of the first arc-shaped plate 1 and the second arc-shaped plate 2 as the installation bases of the fixing spikes 14. The fixing spikes 14 are threadedly connected to the inner walls of the corresponding fixing rings 13 for piercing into the soil to firmly fix the tree-supporting device for forestry planting on the ground.

[0056] First, refer to Figure 4 , in this embodiment, the respective placement grooves in the auxiliary component are respectively opened on both sides of the corresponding fixing spikes 14. The respective auxiliary blocks 15 are respectively rotatably connected to the inner walls of the placement grooves through shafts. Round holes are opened on the fixing spikes 14, and the round holes communicate with the placement grooves. Square grooves are respectively opened on the fixing spikes 14, and the square grooves communicate with the round holes and the placement grooves. The respective first connecting blocks 16 are respectively fixedly connected to the sides of the corresponding auxiliary blocks 15. The respective first rotating rods 17 are respectively rotatably connected to the corresponding first connecting blocks 16 through shafts, and the respective first rotating rods 17 are rotatably connected to each other through shafts. The moving plate 18 is rotatably connected between the first rotating rods 17, and the moving plate 18 is slidably connected to the inner wall of the round hole. The limiting component is installed on the fixing spike 14 for limiting the movement of the moving plate 18.

[0057] On both sides of each fixing thorn 14, a pair of placing grooves are provided for installing the auxiliary block 15. The auxiliary block 15 is rotationally connected in the placing groove through a shaft, allowing it to rotate within a certain angle range to adapt to the fixing requirements of different soil qualities. A round hole is opened at the center position of the fixing thorn 14. This round hole not only communicates with the placing groove but also serves as the track for the sliding of the moving plate 18. The design of the square groove leaves space for the first rotating rod 17 and the moving plate 18 to rotate. The first connecting block 16 is fixed to the side of the auxiliary block 15. The first connecting block 16 provides a stable support point for the first rotating rod 17. The first rotating rod 17 is rotationally connected to the first connecting block 16 through a shaft, forming a rotatable frame. The moving plate 18 is rotationally connected between this frame, and its edge remains in sliding contact with the inner wall of the round hole to ensure stability during movement.

[0058] Finally, refer to Figure 5 In this embodiment, the fixing plate 19 in the limiting assembly is fixedly connected to one end of the fixing thorn 14. A notch is opened on the fixing thorn 14. The sliding column 20 is fixedly connected to the moving plate 18, and the sliding column 20 is slidably connected to the inner wall of the notch. The third threaded column 21 is rotationally connected to the sliding column 20, and one end of the third threaded column 21 passes through the fixing plate 19 and is slidably connected to the fixing plate 19. The second hexagonal nut 22 is threadedly connected to the third threaded column 21, and the second hexagonal nut 22 is in contact with the fixing plate 19.

[0059] The fixing plate 19 is firmly fixedly connected to one end of the fixing thorn 14, serving as the support foundation for the entire limiting assembly. The notch is opened on the fixing thorn 14, and its shape and size match those of the sliding column 20 to ensure that the sliding column 20 can slide smoothly within the notch. The sliding column 20 is fixedly connected to the moving plate 18, serving as the connection bridge between the moving plate 18 and the fixing thorn 14. The third threaded column 21 is rotationally connected to the sliding column 20, allowing the user to adjust the position of the sliding column 20 by rotating the third threaded column 21. When the second hexagonal nut 22 is in contact with the fixing plate 19, the second hexagonal nut 22 will lock the third threaded column 21, as well as the connected sliding column 20 and the moving plate 18, in a fixed position through friction, thereby restricting the further movement of the moving plate 18.

[0060] Working principle:

[0061] For this tree support device for forestry planting, when it is necessary to fixedly clamp a tree, first, the worker places the first arc-shaped plate 1 and the second arc-shaped plate 2 on both sides of the tree, and then passes the first threaded rod 4 through the fixing hole and rotates the first hexagonal nut 6 to make the first arc-shaped plate 1 and the second arc-shaped plate 2 fit the tree.

[0062] When it is necessary to increase the contact area between the first arc-shaped plate 1 and the second arc-shaped plate 2 and the tree, first, a worker pulls the lifting plate 11. The movement of the lifting plate 11 drives the sliding of the limit block 12. Then, the first handle 10 is rotated. The rotation of the first handle 10 drives the rotation of the second threaded rod 9. The rotation of the second threaded rod 9 drives the movement of the push-pull plate 7. The movement of the push-pull plate 7 drives the movement of the slider 8. The top of the push-pull plate 7 is brought into contact with the bottom of the lifting plate 11 to achieve the contact area between the first arc-shaped plate 1 and the second arc-shaped plate 2 and the tree.

[0063] When it is necessary to fix the tree-supporting device for forestry planting on the ground, first, the fixing spikes 14 are inserted into the ground. Then, the fixing spikes 14 are gently lifted upward while the third threaded column 21 is rotated. The rotation of the third threaded column 21 drives the movement of the sliding column 20. The movement of the sliding column 20 drives the movement of the moving plate 18. The movement of the moving plate 18 drives the rotation of the first rotating rod 17. The rotation of the first rotating rod 17 drives the rotation of the first connecting block 16. The rotation of the first connecting block 16 drives the rotation of the auxiliary block 15. The auxiliary block 15 is extended to increase the stress area between the fixing spikes 14 and the ground, making the fixing spikes 14 more firmly inserted into the ground. Finally, the second hexagonal nut 22 is rotated so that the second hexagonal nut 22 comes into contact with the fixing plate 19 to restrict the movement of the third threaded column 21, thereby achieving the fixation of the tree-supporting device for forestry planting.

[0064] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A tree-supporting device for forestry planting, comprising a first curved plate (1) and a second curved plate (2), characterized in that: Also includes: A connecting assembly, the connecting assembly being installed between the first curved plate (1) and the second curved plate (2); An extension component, the extension component is installed on the first curved plate (1) and the second curved plate (2), and is used to increase the contact area between the tree-supporting device for forestry planting and the tree; A fixing assembly, each of which is mounted on the bottom of the first curved plate (1) and the second curved plate (2) respectively, and is used to fix the tree-supporting device for forestry planting on the ground, and the fixing assembly comprises: Fixed rings (13), each of the fixed rings (13) being fixedly connected to the bottom of the first arc-shaped plate (1) and the second arc-shaped plate (2); Fixing spikes (14), each of the fixing spikes (14) being connected to the inner wall of the corresponding fixing ring (13) through a thread; An auxiliary component, which is mounted on the fixing thorn (14) and is used to increase the fixing strength of the fixing thorn (14), and the auxiliary component comprises: Placement grooves, each of the placement grooves is respectively arranged on both sides of the corresponding fixing thorn (14); Auxiliary blocks (15), each of the auxiliary blocks (15) is rotatably connected to the inner wall of the placement groove via an axis; A circular hole, the circular hole being formed on the fixing thorn (14) and communicating with the placement groove; square grooves, each of which is respectively arranged on the fixing thorn (14), and the square grooves are communicated with the circular holes and the placement grooves; First connecting blocks (16), each of the first connecting blocks (16) being fixedly connected to a side surface of a corresponding auxiliary block (15); First rotating rods (17), each of the first rotating rods (17) is rotatably connected to the corresponding first connecting block (16) via an axis, and each of the first rotating rods (17) is rotatably connected to each other via an axis; A movable plate (18), the movable plate (18) being rotatably connected between the first rotating rods (17), and the movable plate (18) being slidably connected to the inner wall of the circular hole; A limiting component is installed on the fixed thorn (14) and is used to limit the movement of the movable plate (18).

2. A tree-supporting device for forestry planting according to claim 1, characterized in that: The connection component comprises: Mounting plates (3), each of the mounting plates (3) being fixedly connected to two sides of the first arc-shaped plate (1) and the second arc-shaped plate (2); Mounting holes, each of the mounting holes being respectively opened on the corresponding mounting plate (3); First threaded rods (4), each of the first threaded rods (4) being respectively connected between the corresponding mounting holes via threads; Hexagonal baffles (5), each of the hexagonal baffles (5) being fixedly connected to one end of the corresponding first threaded rod (4); First hexagonal nuts (6), each of the first hexagonal nuts (6) is respectively connected to the other end of the corresponding first threaded rod (4) through a thread.

3. A tree-supporting device for forestry planting according to claim 2, characterized in that: The extension assembly comprises: Push-pull plates (7), each of the push-pull plates (7) being slidably connected to the first arc-shaped plate (1) and the second arc-shaped plate (2); Slide grooves, each of the slide grooves is respectively arranged on the corresponding first arc-shaped plate (1) and the second arc-shaped plate (2); Slide blocks (8), each of the slide blocks (8) is slidably connected to the inner wall of the corresponding slide groove, and the top of each of the slide blocks (8) is fixedly connected to the bottom of the corresponding push-pull plate (7); A second threaded rod (9), the second threaded rod (9) being rotatably connected to the push-pull plate (7), and one end of the second threaded rod (9) passing through the first arc-shaped plate (1) and the second arc-shaped plate (2); A first handle (10), the first handle (10) being fixedly connected to one end of the second threaded rod (9); A lifting plate (11), wherein the lifting plate (11) is slidably connected to the first curved plate (1) and the second curved plate (2); Limiting grooves, each of the limiting grooves is respectively arranged on two sides of the first arc-shaped plate (1) and the second arc-shaped plate (2); Limit blocks (12), each of the limit blocks (12) is slidably connected to the inner wall of the corresponding limit groove, and each of the limit blocks (12) is fixedly connected to the lifting plate (11).

4. The tree-supporting device for forestry planting according to claim 1, characterized in that: The limiting component comprises: A fixing plate (19), wherein the fixing plate (19) is fixedly connected to one end of the fixing thorn (14); a notch, the notch being formed on the fixing thorn (14); A sliding column (20), wherein the sliding column (20) is fixedly connected to the movable plate (18), and the sliding column (20) is slidably connected to the inner wall of the slot; A third threaded column (21), wherein the third threaded column (21) is rotatably connected to the sliding column (20), and one end of the third threaded column (21) passes through the fixing plate (19) and is slidably connected to the fixing plate (19); A second hexagonal nut (22), wherein the second hexagonal nut (22) is connected to the third threaded column (21) by threading, and the second hexagonal nut (22) is in contact with the fixing plate (19).

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