A support for reforestation
The support assembly, consisting of staggered sprockets and chains, enables the simultaneous straightening and movement of multiple saplings, solving the problem of low efficiency in traditional tree planting support technology, improving installation efficiency and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YUNNAN ACAD OF FORESTRY
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-19
Smart Images

Figure CN120501026B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of support technology, and in particular to a support for afforestation. Background Technology
[0002] In afforestation, landscaping, and ecological restoration projects, newly planted saplings, due to their unstable root systems, are highly susceptible to tilting or even falling over from wind, human impact, or their own weight, severely affecting survival rates and growth quality. To address this issue, tree supports are widely used. Their core function is to stabilize the tree, prevent falling over, promote root recovery and establishment in a stable environment, and protect the trunk from mechanical damage. Currently, commonly used support techniques mainly include: using triangular or quadrangular support frames made of wooden sticks, bamboo poles, or metal rods, fixing the upper end of the support pole to a suitable height on the trunk with ropes, wires, or special straps, and inserting the lower end obliquely into the soil for fixation, or using a single sturdy pillar vertically and tightly buried against the trunk for fixation, and then binding it to the trunk. However, these existing support methods have a significant efficiency bottleneck: they are essentially one-to-one independent support operations for individual saplings. Whether it's measuring and cutting the support pole length, digging fixing holes, assembling the support structure, or the final binding and fixing, the entire set of operations needs to be repeated next to each tree. This method of installing each plant individually is time-consuming, labor-intensive, and has high labor costs. Especially in scenarios requiring large-scale planting, such as afforestation of barren mountains, construction of windbreaks, and greening of large parks, the installation efficiency is extremely low, which seriously restricts the progress and cost control of the overall afforestation and greening. There is an urgent need to develop new support solutions that can improve the efficiency of batch and standardized installation. Summary of the Invention
[0003] To address the aforementioned technical problems, this invention discloses a support component for afforestation, comprising a frame, on which are mounted a first sprocket group and a second sprocket group, with the sprockets at both ends of the first and second sprocket groups being concentrically arranged. A third sprocket group is mounted on the frame, offset from the second sprocket group. A first chain, a second chain, and a third chain are mounted on the first, second, and third sprocket groups. A support component is installed between the first and second sprocket groups, with a connecting long block fixedly mounted on one side of the support component. A third connecting block is mounted on the third chain, and the third connecting block is rotatably connected to the connecting long block. Through this technical solution, the offset third sprocket group ensures that the support component remains vertical, allowing the sapling to remain vertical during movement. Furthermore, multiple support components can simultaneously support multiple saplings.
[0004] Furthermore, the vehicle frame is equipped with four body suspensions, and the lower ends of the body suspensions are fitted with wheels.
[0005] Furthermore, the frame is broken in the middle and connected and fixed by multiple connecting brackets.
[0006] Furthermore, the support assembly includes a first movable block and a second movable block, with a detachable intermediate connecting piece mounted on both blocks, forming a C-shape with an opening on one side. The opening directions of the upper and lower support assemblies of the first, second, and third chains are opposite. Through the above technical solution, the cooperation of the upper and lower support assemblies can fully support the sapling, straighten it, and ensure the quality of planting.
[0007] Furthermore, the first and second movable blocks are provided with grooves, and the intermediate connecting piece is inserted into the groove. A fixing cover is fixed to the second movable block with bolts to fix the intermediate connecting piece. With the above technical solution, after the sapling is straightened from the intermediate connecting pieces on the front and rear sides, the sapling can be removed from the support component by disassembly, ensuring that the tree will not interfere with the internal parts of the support component after planting.
[0008] Furthermore, the first and second movable blocks are provided with threaded holes, and an adjusting screw is fitted inside the threaded holes. One end of the adjusting screw is fixedly equipped with a pressing plate, which straightens the sapling. Adjusting nuts are rotatably mounted on the first and second movable blocks and cooperate with the adjusting screw.
[0009] Furthermore, the extrusion plate is provided with a slide rail, on which a sliding long plate is slidably mounted, and a clamping plate is fixedly mounted on the top of the sliding long plate.
[0010] Furthermore, a connecting vertical rod is fixedly mounted on the first and second movable blocks, a rotating sleeve is rotatably mounted on the connecting vertical rod, and an insert long rod is slidably mounted inside the rotating sleeve, with the end of the insert long rod hinged to the sliding long plate.
[0011] Furthermore, rotating lugs are fixedly mounted on the first and second moving blocks, with a connecting rod rotatably mounted on the rotating lugs. A rotating short rod is fixedly mounted on the connecting rod, and a torsion spring is fixedly mounted between the connecting rod and the rotating lugs. Through the above technical solution, the position of the supported sapling can be changed by the sliding extension and retraction between the extrusion plate and the sliding long plate. The two support components, upper and lower, can greatly improve the quality of straightening and can adjust their positions according to different trees. The clamping plates in the upper and lower support components can be moved closer to each other or further apart, adjusting the support position.
[0012] The beneficial effects of the present invention compared with the prior art are: (1) Through the technical solution of the present invention, the third sprocket group with staggered arrangement can keep the support component in a vertical state, can keep the seedling in a vertical state when moving, and set multiple support components to support multiple seedlings at the same time.
[0013] (2) Through the technical solution of the present invention, the cooperation of the upper and lower support components can fully support the seedlings, straighten the seedlings, and ensure the quality of planting.
[0014] (3) Through the technical solution of the present invention, after the seedling is straightened from the middle connecting piece on the front and rear sides, the seedling can be removed from the support component by disassembly, ensuring that the tree will not interfere with the internal parts of the support component after the planting is completed.
[0015] (4) Through the technical solution of the present invention, the position of the supporting seedling can be changed by the sliding extension and retraction between the extrusion plate and the sliding long plate, and the upper and lower support components can greatly improve the quality of straightening, and the position can be adjusted according to different trees, so that the clamping plates in the upper and lower support components can be close to each other or far away from each other, thus adjusting the position of the support. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention.
[0017] Figure 2 This is a partial structural diagram of an embodiment of the present invention.
[0018] Figure 3 This is a schematic diagram of the support components in an embodiment of the present invention.
[0019] Figure 4 This is another schematic diagram of the support component in an embodiment of the present invention.
[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle.
[0021] Figure 6 This is a side view of the support component in an embodiment of the present invention.
[0022] Figure 7 for Figure 6 Cross-sectional view at point BB.
[0023] Reference numerals: 1-Frame; 2-Body suspension; 3-Walking wheel; 4-Connecting frame; 5-First sprocket assembly; 6-Second sprocket assembly; 7-Third sprocket assembly; 8-First chain; 9-Second chain; 10-Third chain; 11-Third connecting block; 12-Connecting long block; 13-First moving block; 14-Second moving block; 15-Intermediate connecting piece; 16-Fixing cover; 17-Rotating short rod; 18-Rotating lifting lug; 19-Torsion spring; 20-Plug-in rod; 21-Connecting vertical rod; 22-Limiting piece; 23-Rotating sleeve; 24-Plug-in long rod; 25-Side connecting lug; 26-Sliding long plate; 27-Clamping plate; 28-Adjusting screw; 29-Adjusting nut; 30-Second connecting block; 31-First connecting block; 32-Plug-in shaft; 33-Extrusion plate. Detailed Implementation
[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.
[0025] like Figures 1-7 The support component shown includes a frame 1, on which a first sprocket set 5 and a second sprocket set 6 are mounted. The sprockets at both ends of the first sprocket set 5 and the second sprocket set 6 are concentrically arranged. A third sprocket set 7 is mounted on the frame 1 and is offset from the second sprocket set 6. A first chain 8, a second chain 9, and a third chain 10 are mounted on the first sprocket set 5, the second sprocket set 6, and the third sprocket set 7. A support component is installed between the first sprocket set 5 and the second sprocket set 6. The sprockets and chains can be replaced with belts and pulleys, as long as they can transmit power. A connecting block 12 is fixedly mounted on one side of the support component. A third connecting block 11 is mounted on the third chain 10 and is rotatably connected to the connecting block 12. This transmission method allows the support components to always maintain a single direction. Three support components are set on the upper side of the first chain 8, the second chain 9, and the third chain 10, and three support components are set on the lower side. They are positioned opposite each other, forming three groups. When moving, they will move in opposite directions. Furthermore, the support components are completely located outside the first chain 8, the second chain 9, and the third chain 10. They can also be moved to exchange positions, with the support components moving to the inside of the first chain 8, the second chain 9, and the third chain 10.
[0026] The staggered third sprocket group 7 and the second sprocket group 6, together with the rotational connection of the third connecting block 11 and the connecting long block 12, ingeniously constitute a spatial parallel linkage mechanism. The core function of this mechanism is to forcibly constrain the spatial posture (especially the verticality relative to the ground) of the support component throughout its movement along the chain path. This characteristic is crucial, ensuring that regardless of the position of the support component in the chain loop (upper side, lower side, or transition section), its main structure for supporting the sapling remains vertical, providing a fundamental guarantee for subsequent precise sapling straightening. Simultaneously, the design of three support components on each of the upper and lower sides with opposite directions of movement, and the feature that the support components can move to the inside of the chain, allows the device to continuously and efficiently process multiple saplings, significantly different from traditional single-support methods. After one set of support components (such as the upper side) completes the sapling straightening and releases, with the chain drive, another set of support components (such as the lower side) moves into position to receive the next batch of saplings, forming a cyclical operation and greatly improving the efficiency of tree planting support.
[0027] In this embodiment, the frame 1 is equipped with four body suspensions 2, and the lower ends of the body suspensions 2 are fitted with wheels 3. The frame 1 is broken in the middle and connected and fixed by multiple connecting frames 4. Specifically, three connecting frames 4 are set, and the connecting frames 4 are arched, with a height higher than the height of the sapling, so as not to interfere when supporting the sapling. The body suspensions 2 are also set at a certain height so that when the wheels 3 are in contact with the ground, the support components do not directly touch the ground. This frame design has multiple advantages. First, the four body suspensions 2 and wheels 3 form a stable chassis, which facilitates flexible movement in the planting area by manual or mechanical towing and adapts to different terrains. The "broken" design of the frame 1 is not a simple division, but a rigid connection through three towering arched connecting frames 4. This design cleverly creates a continuous central passage space that spans the entire length of the frame. The core function of the arched connecting frame 4 is to provide ample clearance for operation, ensuring that the trunk and branches of the sapling will not collide or interfere with the frame structure during placement, straightening, and final release, thus guaranteeing the safety of the sapling and smooth operation. Simultaneously, the design height of the vehicle suspension 2 is precisely calculated to ensure that when the traveling wheels 3 are on the ground, the lowest-positioned support component (as shown below when the support component is not in operation) maintains ground clearance, preventing the support component from scraping the ground and causing wear or affecting mobility during movement, and also preventing accidental ground contact that could disturb the sapling or soil.
[0028] In this embodiment, the support assembly includes a first movable block 13 and a second movable block 14, which are respectively mounted on a first chain 8 and a second chain 9. A first connecting block 31 and a second connecting block 30 are fixedly mounted on the first chain 8 and the second chain 9. A plug-in shaft 32 is fixedly mounted on both the first movable block 13 and the second movable block 14. The plug-in shaft 32 is hinged to the second connecting block 30 and the first connecting block 31. The first chain 8 and the second chain 9 drive the entire support assembly to move, and then the third connecting block 11 and the connecting long block 12 ensure that it is fixed and always vertical. A middle connecting piece 15 is detachably mounted on the first movable block 13 and the second movable block 14, forming a C-shape with an opening on one side. The opening directions of the upper and lower sides of the support assembly of the first chain 8, the second chain 9, and the third chain 10 are opposite. The opposite openings are designed to straighten the saplings. The first chain 8, the second chain 9, and the third chain 10 move in opposite directions, working in conjunction with the C-shape to straighten the saplings. Through this technical solution, the cooperation of the two support components fully supports the saplings, ensuring their upright position and guaranteeing the quality of planting. The support component is the core unit that directly performs the task of supporting the saplings. The first moving block 13 and the second moving block 14 serve as the basic carriers, hinged to the first connecting block 31 and the second connecting block 30 on the chain via the plug-in shaft 32, achieving a reliable connection between the support component and the chain and allowing for smooth transitions at chain turning points. Crucially, the third connecting block 11 on the third chain 10 drives the connecting long block 12 on the support component through rotational connection, as mentioned earlier, together ensuring that the entire support component remains vertical during movement and operation. The detachable intermediate connecting piece 15, together with the first moving block 13 and the second moving block 14, constitutes the crucial C-shaped clamp structure. The design of the C-shaped structure's opening direction is ingenious: the C-shaped openings of the corresponding support components (one on the upper chain and one on the lower chain) are opposite each other. When the chain drives the upper and lower support components to move synchronously but in opposite directions (e.g., the upper support component moves to the left and the lower support component moves to the right), the clamps formed by the two C-shaped structures simultaneously apply lateral forces to the sapling. Because the upper and lower force application points are staggered and coordinated, a powerful torque is actually generated on the sapling's trunk. This torque can efficiently and accurately correct the sapling's tilt, forcibly straightening it to an upright position. This upward and downward linkage, opposite force application straightening mechanism, compared to a single support point, provides a more stable and reliable straightening effect, effectively resisting the risk of secondary tilting caused by wind or loose soil.
[0029] In this embodiment, the first moving block 13 and the second moving block 14 are provided with grooves, and the intermediate connecting piece 15 is inserted into the grooves. The second moving block 14 is fixed with a fixing cover 16 using bolts to fix the intermediate connecting piece 15. This connection method is ingeniously designed, taking into account both the convenience of operation and the stability of the structure. The grooves provide precise positioning, ensuring that the intermediate connecting piece 15 is accurately positioned after installation, forming a complete C-shaped profile. The fixing cover 16 is fastened with bolts, providing strong clamping force, so that the intermediate connecting piece 15 will not loosen or fall off when subjected to lateral thrust during the straightening of the sapling, ensuring the overall rigidity and straightening force of the support component. Through the above technical solution, after the sapling is straightened from the intermediate connecting pieces 15 on the front and rear sides, it can be removed from the support component by disassembly, ensuring that the tree will not interfere with the internal parts of the support component after planting. The bolt connection of the fixing cover 16 makes the disassembly of the intermediate connecting piece 15 quick and simple. Once the sapling is straightened and secured (e.g., by covering it with soil and tamping it down or using auxiliary anchors), the intermediate connecting piece 15 can be easily pulled out of the groove simply by loosening the bolts on the fixing cover 16. At this point, the C-shaped structure is fully open in the direction of the sapling's trunk, providing an unobstructed passage for the sapling's release. When the support assembly is removed with the frame, the sapling can remain in place without any obstruction, completely avoiding the risk of pulling damage to the sapling or root system that may be caused when removing traditional support structures. It also ensures that the complex transmission and adjustment mechanisms inside the support component are not disturbed by the planted trees during subsequent movement and operation.
[0030] In this embodiment, threaded holes are provided on the first moving block 13 and the second moving block 14, and an adjusting screw 28 is fitted into the threaded holes. A pressing plate 33 is fixedly installed at one end of the adjusting screw 28. The pressing plate 33 straightens the sapling. An adjusting nut 29 is rotatably installed on the first moving block 13 and the second moving block 14, which cooperates with the adjusting screw 28. This adjustment mechanism provides active and precise control of the clamping force on the sapling. Its working principle is intuitive and effective: rotate the adjusting nut 29 installed on the first moving block 13 or the second moving block 14. Since the adjusting nut 29 and the adjusting screw 28 form a threaded transmission pair, rotating the nut 29 will drive the adjusting screw 28 to move linearly along its axis. The pressing plate 33 fixed to the end of the screw will move synchronously. When the adjusting nut 29 is rotated clockwise (or counterclockwise, depending on the thread direction), the pressing plate 33 moves towards the sapling, applying uniform lateral pressure to the trunk, and assisting the C-shaped structure to clamp the sapling more tightly in the predetermined position; rotating in the opposite direction will release the pressure. This mechanical adjustment has a self-locking feature; once set, the clamping force is stable and reliable, and will not loosen due to vibration or external force. It is particularly suitable for trees with irregular trunk sections or those requiring greater support. The mechanism allows operators to make fine adjustments based on the thickness of the sapling and the required support strength, ensuring stable uprighting without damaging the bark.
[0031] In this embodiment, a slide rail is provided on the extrusion plate 33, and a sliding long plate 26 is slidably mounted on the slide rail. A clamping plate 27 is fixedly mounted on the top of the sliding long plate 26. A connecting vertical rod 21 is fixedly mounted on the first moving block 13 and the second moving block 14. A rotating sleeve 23 is rotatably mounted on the connecting vertical rod 21, and an insertion long rod 24 is slidably mounted inside the rotating sleeve 23. The end of the insertion long rod 24 is hinged to the sliding long plate 26. A limiting piece 22 is fixedly mounted on one side of the connecting vertical rod 21. The limiting piece 22 cooperates with the extrusion plate 33 to assist the extrusion plate 33 in sliding. This part of the mechanism further enhances the adaptability and functionality of the support assembly. The design of the slide rail and the sliding long plate 26 allows the height of the clamping plate 27 to be adjusted up and down relative to the extrusion plate 33. The adjustment process is divided into two steps: first, by sliding the insertion long rod 24 along the rotating sleeve 23, the extension length of the insertion long rod 24 can be roughly changed; second, by rotating the rotating sleeve 23, the angle of the insertion long rod 24 can be finely adjusted. Since the end of the insertion rod 24 is hinged to the sliding plate 26, the aforementioned changes in length and angle are converted into a pushing and pulling action on the sliding plate 26, driving it to move precisely up and down along the slide on the pressing plate 33, thereby causing the clamping plate 27 to rise and fall. In this way, the height of the clamping point (clamping plate 27) can be flexibly set according to the actual height of the sapling, the position of its center of gravity, or specific parts that require additional support (such as below the branching point), providing the best straightening effect. The limiting piece 22 serves to guide and limit the movement of the pressing plate 33, ensuring that it slides smoothly along the preset path without deviating.
[0032] In this embodiment, a rotating lug 18 is fixedly mounted on the first moving block 13 and the second moving block 14. A connecting rod 20 is rotatably mounted on the rotating lug 18, and a rotating short rod 17 is fixedly mounted on the connecting rod 20. A torsion spring 19 is fixedly mounted between the connecting rod 20 and the rotating lug 18. Through the above technical solution, the position of the supported sapling can be changed by the sliding extension and retraction between the compression plate 33 and the sliding long plate 26. Furthermore, the upper and lower support components can greatly improve the quality of straightening, and their positions can be adjusted according to different trees. The clamping plates 27 in the upper and lower support components can be moved closer to each other or further apart, adjusting the support position. The rotating short rod 17 and its mounting mechanism (rotating lug 18, connecting rod 20, torsion spring 19) constitute a flexible auxiliary limiting or releasing mechanism. Under normal conditions, the preload of the torsion spring 19 keeps the rotating short rod 17 in a specific initial position (such as horizontal or slightly upward), which may be used to slightly obstruct the sapling or guide it into the C-shaped opening. When the support component needs to be removed from the sapling but the sapling's position may block the normal release path (e.g., due to a large branch), the sapling can push the rotating short rod 17. The rotating short rod 17 causes the plug rod 20 to rotate around the rotating lug 18, overcoming the torque of the torsion spring 19, thereby clearing a path for the sapling, achieving flexible release, and reducing hard scraping of the sapling.
[0033] Working principle: Push the frame 1 to the location where the tree is to be planted, then drive the first sprocket group 5, the second sprocket group 6, and the third sprocket group 7 to align all the support components vertically with a certain degree of misalignment. Remove the middle connecting piece 15, then place the sapling between the first moving block 13 and the second moving block 14. Replace the middle connecting piece 15 in its original position, ensuring that the upper side of each sapling overlaps with the middle connecting piece 15, and the lower side also overlaps with the lower middle connecting piece 15. After all the saplings are in place, continue to drive the first sprocket group 5, the second sprocket group 6, and the third sprocket group 7 to align the support components vertically. At this point, push the sapling with the middle connecting piece 15 to straighten it. After straightening, fix the sapling. After completion, remove the middle connecting piece 15, move the frame 1, and let the support components leave the sapling. Some saplings will leave through the position of the middle connecting piece 15, while others will leave the support components by rotating the short rod 17.
[0034] During use, adjustments can be made according to the size and shape of the tree. When supporting larger trees, the support components are positioned on the upper and lower sides of the first chain 8, the second chain 9, and the third chain 10. This results in a larger support spacing, which provides greater stability. By rotating the adjusting nut 29, the adjusting screw 28 is moved, which in turn moves the pressing plate 33. The pressing plate 33 clamps the sapling. By manually moving the plug-in long rod 24 and rotating the rotating sleeve 23, the sliding long plate 26 can be moved upward, increasing the support height. The sapling is then clamped by the clamping plate 27.
[0035] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A support for reforestation, characterized in that, The vehicle includes a frame (1), on which a first sprocket set (5) and a second sprocket set (6) are mounted. The sprockets at both ends of the first sprocket set (5) and the second sprocket set (6) are concentrically arranged. A third sprocket set (7) is mounted on the frame (1). The third sprocket set (7) is offset from the second sprocket set (6). A first chain (8), a second chain (9), and a third chain (10) are mounted on the first sprocket set (5), the second sprocket set (6), and the third sprocket set (7). A support assembly is installed between the first sprocket set (5) and the second sprocket set (6). A connecting block (12) is fixedly mounted on one side of the support assembly. A third connecting block (11) is mounted on the third chain (10). The third connecting block (11) and the connecting block (12) are rotatably connected. The support assembly includes a first moving block (13) and a second moving block (14). A first connecting block (31) and a second connecting block (30) are fixedly mounted on the first sprocket group (5) and the second sprocket group (6). A plug shaft (32) is fixedly mounted on both the first connecting block (31) and the second connecting block (30). The plug shaft (32) is hinged to the second connecting block (30) and the first connecting block (31). The entire support assembly is driven to move by the first chain (8) and the second chain (9). Then, the fixed state is ensured by the third connecting block (11) and the connecting long block (12). An intermediate connecting piece (15) is detachably mounted on the first moving block (13) and the second moving block (14), forming a C-shape with an opening on one side. The opening directions of the upper and lower sides of the support assembly of the first chain (8), the second chain (9), and the third chain (10) are opposite. The first movable block (13) and the second movable block (14) are provided with grooves, and the intermediate connecting piece (15) is inserted into the groove. The second movable block (14) is fixed with a fixing cover (16) by bolts to fix the intermediate connecting piece (15). The first moving block (13) and the second moving block (14) are provided with threaded holes, and an adjusting screw (28) is fitted inside the threaded holes. One end of the adjusting screw (28) is fixedly fitted with a pressing plate (33). The sapling is straightened by the pressing plate (33). The first moving block (13) and the second moving block (14) are rotatably fitted with adjusting nuts (29) that cooperate with the adjusting screw (28).
2. A support for reforestation according to claim 1, characterised in that, The frame (1) is equipped with four body suspensions (2), and the lower end of the body suspensions (2) is equipped with a running wheel (3).
3. A support component for afforestation according to claim 2, characterized in that, The frame (1) is broken in the middle and is connected and fixed by multiple connecting brackets (4).
4. A support for reforestation according to claim 3, characterised in that, The extrusion plate (33) is provided with a slide rail, and a sliding long plate (26) is slidably mounted on the slide rail. A clamping plate (27) is fixedly mounted on the top of the sliding long plate (26).
5. A support for reforestation according to claim 4, characterised in that, A connecting vertical rod (21) is fixedly mounted on the first moving block (13) and the second moving block (14). A rotating sleeve (23) is rotatably mounted on the connecting vertical rod (21). A plug-in long rod (24) is slidably mounted inside the rotating sleeve (23). The end of the plug-in long rod (24) is hinged to the sliding long plate (26).
6. A support for reforestation according to claim 5, characterised in that, The first moving block (13) and the second moving block (14) are fixedly equipped with rotating lugs (18), and a plug rod (20) is rotatably mounted on the rotating lugs (18). A rotating short rod (17) is fixedly mounted on the plug rod (20), and a torsion spring (19) is fixedly mounted between the plug rod (20) and the rotating lugs (18).