Coastal windproof sapling associated stabilizing device

Abstract

The utility model discloses a coastal windproof sapling accompanying stabilizing device in the field of forestry planting auxiliary equipment, which comprises a support ring arranged on the outer side of the trunk of a sapling and a plurality of support legs distributed along the circumferential direction, the lower end of each support leg is hinged to a ground inserting fixing piece, the upper end of each support leg is hinged to the support ring, and the support ring is of an elastic reducing structure. The supporting legs are used for being matched with the increase of the trunk diameter of the sapling in a self-adaptive mode, each supporting leg is of a telescopic rod structure, and a one-way retaining mechanism is arranged in each supporting leg and is configured to allow the telescopic rod structure to extend and prevent the telescopic rod structure from being shortened when pressed. According to the device, the supporting ring is driven to expand and synchronously move upwards to support the position by using the growth power of radial thickening and longitudinal height of the nursery stock, the geometric displacement and the inclination angle are spontaneously compensated through the upper and lower double-hinged structures, the constraint of the supporting structure on the growth of the nursery stock is eliminated, and the pressure moment is physically cut off by using the one-way retaining mechanism; dynamic accompanying and instantaneous rigid wind-resistant stability of the device in the initial stage of seedling field planting are achieved.

Description

Technical Field

[0001] This utility model relates to the field of forestry planting auxiliary equipment, specifically to a device for stabilizing coastal windbreak seedlings. Background Technology

[0002] Afforestation in coastal areas is an important means of building ecological barriers, defending against typhoons, and mitigating coastal erosion. Because coastal environments are typically characterized by frequent strong winds, severe salt spray corrosion, and loose sandy soil, newly planted seedlings are highly susceptible to tilting, lodging, or even uprooting due to wind during their initial growth period before their roots have fully developed.

[0003] Currently, the reinforcement of saplings mostly uses rigid wooden or metal supports, which are tied to the trunk with ropes or fixing rings. However, this traditional reinforcement method is generally a static support and cannot meet the needs of the long-term development of saplings.

[0004] On the one hand, the inner diameter of traditional support rings is usually fixed. As the tree's radial diameter continues to increase, the fixing ring will gradually cut into the bark, which not only damages the vascular tissue and restricts nutrient transport, but may also cause girdling and lead to tree death. If a support ring with a larger diameter is chosen in order to leave a gap, it will not be able to play a precise stabilizing role in the early stage of seedling growth.

[0005] On the other hand, as the seedlings grow taller and their center of gravity shifts upward, the geometry of the support system needs to be dynamically adjusted. However, the existing support legs have fixed lengths and cannot spontaneously compensate for tilt angles or lengths as the trees grow and shift.

[0006] Therefore, it is necessary to improve one or more of the problems existing in the above-mentioned related technical solutions.

[0007] It should be noted that this section is intended to provide background or context for the technical solutions of this utility model as set forth in the claims. The description herein does not constitute an admission that it is prior art simply because it is included in this section. Utility Model Content

[0008] The purpose of this invention is to provide a stabilizing device for coastal windbreak seedlings to solve the problem that traditional seedling support structures cannot adapt to the growth and development of seedlings.

[0009] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0010] A coastal windbreak seedling stabilization device includes a support ring (1) located on the outside of the seedling trunk and several support legs (4) distributed circumferentially on the outside of the support ring (1). The lower end of each support leg (4) is hinged to a ground-inserting fixing member (5), and the upper end is hinged to the support ring (1).

[0011] The support ring (1) is an elastic variable diameter structure; the support ring (1) is configured to hug the trunk of the seedling by contracting the elastic variable diameter structure;

[0012] The support leg (4) is a telescopic rod structure, and at least one of the support legs (4) has a one-way anti-retraction mechanism in the telescopic rod structure. The one-way anti-retraction mechanism is configured to allow the telescopic rod structure to extend and prevent the telescopic rod structure from shortening when compressed.

[0013] Furthermore, the support leg (4) is classified into a first support leg group (2) and a second support leg group (3), with the first support leg group (2) and the second support leg group (3) located on opposite sides of the support ring (1);

[0014] Among them, the telescopic rod structure of the second support leg group (3) is provided with the one-way anti-reverse mechanism compared to the first support leg group (2);

[0015] In contrast to the second support leg group (3), the telescopic rod structure of the first support leg group (2) is provided with a compression spring (4e), which always applies an outward extension thrust to the first support leg group (2).

[0016] Furthermore, the support ring (1) includes:

[0017] Multiple arc-shaped support plates (1a), one of which has several first hinge positions (1a1) spaced apart along its arc length direction on its outer side, the first hinge positions (1a1) being used for hinged connection of the first support leg assembly (2), and another arc-shaped support plate (1a) has several second hinge positions (1a2) spaced apart along its arc length direction on its outer side, the second hinge positions (1a2) being used for hinged connection of the second support leg assembly (3);

[0018] Multiple elastic tightening members, each of which is correspondingly disposed between the adjacent ends of two adjacent arc-shaped clamping plates (1a);

[0019] Each of the elastic tightening members is used to apply a radial tightening force to two adjacent arc-shaped retaining plates (1a) so that the inner sides of all the arc-shaped retaining plates (1a) are pressed against the trunk of the sapling;

[0020] The arc-shaped retaining plate (1a) is an elastic metal sheet and its inner wall is provided with a first rubber anti-slip layer (1b).

[0021] Furthermore, each of the elastic tightening members is provided with at least two tension springs (1c), which are used to connect and tighten the same end of the two arc-shaped clamping plates (1a), and the at least two tension springs (1c) are spaced vertically along the width direction of the arc-shaped clamping plate (1a);

[0022] Each of the arc-shaped retaining plates (1a) has a pin (1e) on its outer end wall for connecting one end of the tension spring (1c).

[0023] Furthermore, all the elastic tightening members together form an elastic clamp, which is sleeved on the outside of the two arc-shaped clamps (1a). All the first hinge positions (1a1) and all the second hinge positions (1a2) have a limiting groove formed at the contact point of the arc-shaped clamps (1a) for the elastic clamp to pass through.

[0024] Furthermore, the telescopic rod structure with the one-way anti-reverse mechanism includes two rigid shafts and a bushing connecting the two rigid shafts. The bushing is fixedly connected to one of the rigid shafts, and the other rigid shaft is configured to pass through the bushing. The two rigid shafts are parallel to each other and are radially offset by a predetermined distance.

[0025] An elliptical cylindrical roller pin is provided in the preset spacing. The elliptical cylindrical roller pin is fixedly axially connected to the inner middle of the bushing. The axial direction of the elliptical cylindrical roller pin and the bushing is perpendicular. A torsion spring is provided at the axial connection between the elliptical cylindrical roller pin and the bushing.

[0026] Among them, the cross-section of the elliptical cylindrical roller pin is set at an acute angle with the axial direction of the bushing, and the prestress of the torsion spring ensures that the two opposite sides of the elliptical cylindrical roller pin are always tightly attached to the two rigid shafts respectively.

[0027] When the telescopic rod structure is compressed, the elliptical cylindrical roller pin, under the action of friction between the two rigid shafts, tends to turn its long axis direction to a direction perpendicular to the shaft sleeve axis, so as to generate radial extrusion force and achieve self-locking of the two rigid shafts.

[0028] When the telescopic rod structure is stretched, the elliptical cylindrical roller pin, under the action of friction between two rigid shafts, tends to deflect in the opposite direction of its minor axis to release the self-locking.

[0029] Furthermore, spline-shaped anti-slip patterns are formed on the outer wall of the elliptical cylindrical roller pin.

[0030] Furthermore, a planar portion extending along its axial direction is formed on the outer wall of the rigid shaft, and the cross-section of the rigid shaft at the location of the planar portion is at least partially "D" shaped, and a number of anti-slip ribs are formed on the planar portion at equal intervals along its length extension direction.

[0031] Furthermore, the outer wall of the elliptical cylindrical roller pin is provided with a second rubber anti-slip layer.

[0032] Furthermore, a plug is formed at the lower end of the ground plug fastener, and several barbs are formed on the outer wall of the plug, which are distributed circumferentially and extend upwards at an angle.

[0033] The beneficial effects of this utility model are:

[0034] This device utilizes the elastic variable diameter structure of the support ring and the unidirectional telescopic rod structure of the support leg to passively expand the diameter of the device and simultaneously move the support position upward by leveraging the growth dynamics of the seedling's radial thickening and longitudinal height increase. Combined with the double hinged connection at both ends of the support leg, the support system can dynamically compensate for geometric displacement and tilt angle according to the seedling's growth trajectory. While eliminating the constraint of the support structure on seedling growth, the unidirectional anti-reverse mechanism physically cuts off the pressure torque, achieving a mechanical balance between the accompanying protection of the seedling in the early stage of planting and the instantaneous rigid wind resistance stability. Attached Figure Description

[0035] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0036] Figure 1 This is a plan view of the coastal windbreak seedling stabilization device according to an embodiment of the present invention;

[0037] Figure 2 This is a top view schematic diagram of the coastal windbreak seedling stabilization device according to an embodiment of the present utility model;

[0038] Figure 3 This is a schematic diagram of the planar structure of the support ring according to an embodiment of the present utility model;

[0039] Figure 4 This is a partial three-dimensional structural diagram of the telescopic rod structure corresponding to the second support leg assembly in an embodiment of this utility model.

[0040] Figure 5 for Figure 4 Enlarged partial sectional view diagram;

[0041] Figure 6 This is a planar sectional view of the telescopic rod structure corresponding to the first support leg assembly of this utility model;

[0042] Figure 7 This is a schematic diagram of the planar structure of the floor plug fixing component according to an embodiment of the present utility model;

[0043] The labels in the diagram represent the following: 1-Support ring; 1a-Arc-shaped retaining plate; 1a1-First hinge position; 1a2-Second hinge position; 1b-First rubber anti-slip layer; 1c-Tension spring; 1e-Pin shaft; 2-First support leg assembly; 3-Second support leg assembly; 4-Support leg; 4a-Rigid shaft; 4a1-Flat surface part; 4a2-Anti-slip rib; 4b-Busset; 4c-Elliptical cylindrical roller pin; 4e-Compression spring; 5-Ground insert fixing part; 5a-Insertion rod; 5a1-Barbed part. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] This embodiment provides a coastal windbreak seedling stabilization device, which aims to solve the problems that traditional seedling support structures cannot adapt to the growth and development of seedlings and have low wind resistance efficiency under variable wind conditions.

[0046] Specifically, refer to Figures 1 to 7 This coastal windbreak sapling stabilization device includes a support ring 1 located on the outside of the sapling trunk and several support legs 4 distributed circumferentially on the outside of the support ring 1. Each support leg 4 has a ground-insertion fixing member 5 hinged to its lower end and is hinged to the support ring 1 at its upper end. The support ring 1 is an elastically variable diameter structure, configured to hold the sapling trunk tightly by contracting the elastically variable diameter structure. The support legs 4 are telescopic rod structures, and at least one support leg 4 has a one-way anti-retraction mechanism within its telescopic rod structure. The one-way anti-retraction mechanism is configured to allow the telescopic rod structure to extend while preventing it from shortening under pressure.

[0047] In the actual installation process, Figure 3 In the middle, all the support legs 4 are classified into the first support leg group 2 and the second support leg group 3, which are located on opposite sides of the support ring 1.

[0048] The first support leg group 2 is arranged on the side closer to the coastline, i.e. the windward side, while the second support leg group 3 is arranged on the side farther from the coastline, i.e. the leeward side. Compared with the first support leg group 2, the telescopic rod structure of the second support leg group 3 is equipped with a one-way anti-reverse mechanism.

[0049] During the growth of the seedling, the expansion force generated by the radial thickening of the trunk drives the expansion of the support ring 1 of the elastic variable diameter structure. Since the upper and lower ends of the support leg 4 are hinged, the support leg 4 can adjust the tilt angle accordingly to release geometric stress.

[0050] At the same time, as the seedling grows taller, its center of gravity moves upward. If the position of the support ring 1 remains unchanged, when subjected to strong winds, the lever arm formed between the existing low support point and the center of gravity is too long, which can easily produce a significant leverage effect and cause the base of the seedling to be overloaded. Since the one-way anti-reverse mechanism allows the telescopic rod to extend, the power generated by the longitudinal growth of the seedling can drive the support ring 1 to move upward synchronously, so that the support point automatically rises as the height of the seedling increases.

[0051] However, if only the one-way anti-reverse mechanism is used, when the seedling is blown by a breeze from the sea and sways slightly towards the sea, the second support leg group 3 on the leeward side may be passively stretched, resulting in unnecessary false elongation.

[0052] refer to Figure 6 As shown, in order to overcome this defect, compared with the second support leg group 3, the telescopic rod structure of the first support leg group 2 is provided with a compression spring 4e. The compression spring 4e always applies an outward extension thrust to the first support leg group 2. The thrust of the compression spring 4e is configured to apply a constant pressure to the first support leg group 2 when the support ring 1 is not subjected to external force, so as to limit the first support leg group 2 from elongating due to the swaying of the seedlings in a light wind.

[0053] With this prestressed configuration, the first support leg group 2 actively pushes the support ring 1 towards the second support leg group 3, ensuring that the one-way anti-reverse mechanism remains in a tight state under non-disaster weather conditions.

[0054] refer to Figure 3 As shown, in order to achieve precise envelopment of the sapling trunk and ensure reliable force transmission, the support ring 1 includes:

[0055] Multiple arc-shaped support plates 1a, one of which has several first hinge positions 1a1 spaced apart along its arc length on its outer side, the first hinge positions 1a1 being used for hinged connection of the first support leg group 2, and the other arc-shaped support plate 1a has several second hinge positions 1a2 spaced apart along its arc length on its outer side, the second hinge positions 1a2 being used for hinged connection of the second support leg group 3.

[0056] Multiple elastic tightening components are provided, each elastic tightening component being disposed between the adjacent ends of two adjacent arc-shaped clamping plates 1a.

[0057] Each elastic tightening member is used to apply a radial tightening force to two adjacent arc-shaped retaining plates 1a, so that the inner sides of all the arc-shaped retaining plates 1a are tightly attached to the trunk of the sapling.

[0058] The arc-shaped retaining plate 1a is an elastic metal sheet with a first rubber anti-slip layer 1b on its inner wall. It is configured to produce elastic deformation under the action of radial clamping force to envelop the trunk of the sapling, and has the tendency to return to its initial shape after the radial clamping force is removed.

[0059] It should be noted that the number of curved retaining plates 1a and elastic tightening components is consistent, both consisting of two, three, or more. (Reference) Figure 3 As shown, taking two arc-shaped retaining plates 1a and two elastic tightening components as an example. The corresponding number of arc-shaped retaining plates 1a and three elastic tightening components can also be three, in which the three arc-shaped retaining plates 1a together form a ring, and the three elastic tightening components are respectively arranged at the intervals between the three arc-shaped retaining plates 1a.

[0060] The first rubber anti-slip layer 1b serves two purposes: firstly, it tightly grips the bark through high friction, ensuring that the support ring 1 can obtain sufficient traction as the seedling grows taller, thereby driving the entire support structure to rise accordingly.

[0061] Secondly, when the saplings are subjected to strong winds and tend to fall, the relative sliding between the support ring 1 and the trunk is reduced. If this anti-slip layer is missing, the metal spring sheet alone will easily slip when in contact with the trunk, causing the falling load to be unable to effectively drive the second support leg group 3 to lock. However, the frictional resistance provided by the anti-slip layer can ensure that the load is accurately transmitted to the support leg 4, which has a backstop effect.

[0062] Regarding the specific form of the elastic tightening component, to prevent the clamping plates from axially deflecting under force, each elastic tightening component is equipped with two tension springs 1c. Both tension springs 1c are used to connect and tighten the same end of the two arc-shaped clamping plates 1a, and the two tension springs 1c are spaced vertically along the width direction of the arc-shaped clamping plates 1a. (Reference) Figure 1 and Figure 3 As shown, taking two arc-shaped retaining plates 1a and two elastic tightening components as an example, the elastic tightening components are two sets of tension springs 1c, with two tension springs in each set. Each set of tension springs 1c is used to connect and tighten the same end of the two arc-shaped retaining plates 1a, and the two tension springs 1c are spaced apart along the width direction of the arc-shaped retaining plates 1a.

[0063] Each arc-shaped retaining plate 1a has a pin 1e on its outer end wall for connecting one end of the tension spring 1c. Alternatively, to simplify installation and improve force uniformity, the elastic tightening element can also be an elastic clamp. The elastic clamp is sleeved on the outside of the two arc-shaped retaining plates 1a. All first hinge positions 1a1 and all second hinge positions 1a2 have a limiting groove formed at the contact point of the arc-shaped retaining plates 1a for the elastic clamp to pass through. The design of the limiting groove ensures that the clamp provides circumferential tightening force without causing structural interference with the hinge part of the support leg 4.

[0064] In the microscopic implementation of the one-way anti-reverse mechanism, if a one-way tooth surface structure is adopted, there will be gaps in its physical locking and it is prone to failure due to wear.

[0065] refer to Figure 4 and Figure 5 As shown, to achieve high-precision self-locking, the telescopic rod structure with a one-way anti-locking mechanism includes two rigid shafts 4a and a bushing 4b connecting the two rigid shafts 4a. The bushing 4b is fixedly connected to one of the rigid shafts 4a, and the other rigid shaft 4a is configured to pass through the bushing 4b. The two rigid shafts 4a are parallel to each other and are radially offset by a preset distance. An elliptical cylindrical roller pin 4c is provided in the preset distance. The elliptical cylindrical roller pin 4c is fixedly axially connected to the inner middle of the bushing 4b. The axial directions of the elliptical cylindrical roller pin 4c and the bushing 4b are perpendicular, and a torsion spring is provided at the axial connection between the elliptical cylindrical roller pin 4c and the bushing 4b.

[0066] The cross-section of the elliptical cylindrical roller pin 4c is set at an acute angle with the axial direction of the bushing 4b. The prestress of the torsion spring ensures that the two opposite sides of the elliptical cylindrical roller pin 4c are always tightly attached to the two rigid shafts 4a.

[0067] When the telescopic rod structure is compressed, the elliptical cylindrical roller pin 4c, under the action of friction between the two rigid shafts 4a, tends to turn its long axis direction to a direction perpendicular to the axial direction of the bushing 4b, so as to generate radial extrusion force and achieve self-locking of the two rigid shafts 4a.

[0068] When the telescopic rod structure is stretched, the elliptical cylindrical roller pin 4c, under the action of friction between the two rigid shafts 4a, tends to deflect in the opposite direction of its minor axis to release the self-locking.

[0069] For all the support legs 4 in the first support leg group 2, the compression spring 4e is set inside the bushing 4b, and its two ends are respectively pressed against the opposing ends of the two rigid shafts 4a. The ends of the two rigid shafts 4a that extend into the bushing 4b are provided with limiting steps to prevent them from disengaging from the bushing 4b.

[0070] To further enhance the locking friction in extreme environments, spline-shaped anti-slip patterns are formed on the outer wall of the elliptical cylindrical roller pin 4c. Correspondingly, a planar portion 4a1 extending along its axial direction is formed on the outer wall of the rigid shaft 4a. The cross-section of the rigid shaft 4a at the location of the planar portion 4a1 is at least partially "D" shaped. Several anti-slip ribs 4a2 are formed on the planar portion 4a1, which are evenly distributed along its length.

[0071] The combination of this irregular cross-section and the ribs increases the contact area, ensuring that the rigid connection can still be maintained under strong vibration loads. In addition, the outer wall of the elliptical cylindrical roller pin 4c can also be provided with a second rubber anti-slip layer as a means of friction enhancement.

[0072] refer to Figure 7 As shown, considering the weak adhesion of coastal sandy soil, a rod 5a is formed at the lower end of the ground anchor 5. Several barbs 5a1 are formed on the outer wall of the rod 5a, which are distributed along its circumference and extend upward. When a strong wind generates an upward pulling force, the barbs 5a1 penetrate into the soil and form an effective anchoring resistance to prevent the support leg 4 from coming off the ground as a whole.

[0073] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of this utility model.

Claims

1. A device for stabilizing a coastal windbreak sapling, characterized by, It includes a support ring (1) located on the outside of the trunk of the sapling and several support legs (4) distributed circumferentially on the outside of the support ring (1). The lower end of each support leg (4) is hinged to a ground-inserting fixing piece (5), and the upper end is hinged to the support ring (1). The support ring (1) is an elastic variable diameter structure, and the support ring (1) is configured to hug the trunk of the seedling by contracting the elastic variable diameter structure; The support leg (4) is a telescopic rod structure, and at least one of the support legs (4) has a one-way anti-retraction mechanism in the telescopic rod structure. The one-way anti-retraction mechanism is configured to allow the telescopic rod structure to extend and prevent the telescopic rod structure from shortening when compressed.

2. The device according to claim 1, wherein The support leg (4) is classified into a first support leg group (2) and a second support leg group (3), with the first support leg group (2) and the second support leg group (3) located on opposite sides of the support ring (1); Among them, the telescopic rod structure of the second support leg group (3) is provided with the one-way anti-reverse mechanism compared to the first support leg group (2); In contrast to the second support leg group (3), the telescopic rod structure of the first support leg group (2) is provided with a compression spring (4e), which always applies an outward extension thrust to the first support leg group (2).

3. The coastal windbreak seedling stabilization device according to claim 2, characterized in that, The support ring (1) includes: Multiple arc-shaped support plates (1a), one of which has several first hinge positions (1a1) spaced apart along its arc length direction on its outer side, the first hinge positions (1a1) being used for hinged connection of the first support leg assembly (2), and another arc-shaped support plate (1a) has several second hinge positions (1a2) spaced apart along its arc length direction on its outer side, the second hinge positions (1a2) being used for hinged connection of the second support leg assembly (3); Multiple elastic tightening members, each of which is correspondingly disposed between the adjacent ends of two adjacent arc-shaped clamping plates (1a); Each of the elastic tightening members is used to apply a radial tightening force to two adjacent arc-shaped retaining plates (1a) so that the inner sides of all the arc-shaped retaining plates (1a) are pressed against the trunk of the sapling; The arc-shaped retaining plate (1a) is an elastic metal sheet and its inner wall is provided with a first rubber anti-slip layer (1b).

4. The coastal windbreak seedling stabilization device according to claim 3, characterized in that, Each of the elastic tightening members is provided with at least two tension springs (1c), which are used to connect and tighten the same end of the two arc-shaped clamps (1a), and the at least two tension springs (1c) are spaced vertically along the width direction of the arc-shaped clamps (1a); Each of the arc-shaped retaining plates (1a) has a pin (1e) on its outer end wall for connecting one end of the tension spring (1c).

5. The coastal windbreak seedling stabilization device according to claim 3, characterized in that, All the elastic tightening components together form an elastic clamp, which is sleeved on the outside of the two arc-shaped clamps (1a). All the first hinge positions (1a1) and all the second hinge positions (1a2) have a limiting groove formed at the contact point of the arc-shaped clamps (1a) for the elastic clamp to pass through.

6. The coastal windbreak seedling stabilization device according to claim 2, characterized in that, The telescopic rod structure with the one-way anti-reverse mechanism includes two rigid shafts (4a) and a bushing (4b) connecting the two rigid shafts (4a). The bushing (4b) is fixedly connected to one of the rigid shafts (4a), and the other rigid shaft (4a) is configured to pass through the bushing (4b). The two rigid shafts (4a) are parallel to each other and are radially offset by a predetermined distance. An elliptical cylindrical roller pin (4c) is provided in the preset spacing. The elliptical cylindrical roller pin (4c) is axially connected to the inner middle of the bushing (4b) at a fixed point. The axial directions of the elliptical cylindrical roller pin (4c) and the bushing (4b) are perpendicular. A torsion spring is provided at the axial connection between the elliptical cylindrical roller pin (4c) and the bushing (4b). The cross-sectional major axis of the elliptical cylindrical roller pin (4c) is set at an acute angle with the axial direction of the bushing (4b), and the prestress of the torsion spring ensures that the two opposite sides of the elliptical cylindrical roller pin (4c) are always tightly attached to the two rigid shafts (4a). When the telescopic rod structure is compressed, the elliptical cylindrical roller pin (4c) tends to turn its long axis direction to be perpendicular to the axial direction of the bushing (4b) under the action of friction between the two rigid shafts (4a), so as to generate radial extrusion force and achieve self-locking of the two rigid shafts (4a); When the telescopic rod structure is stretched, the elliptical cylindrical roller pin (4c) tends to deflect in the opposite direction of its minor axis under the action of friction between the two rigid shafts (4a) to release the self-locking.

7. The coastal windbreak seedling stabilization device according to claim 6, characterized in that, The outer wall of the elliptical cylindrical roller pin (4c) has a spline-shaped anti-slip pattern.

8. The coastal windbreak seedling stabilization device according to claim 7, characterized in that, A planar portion (4a1) extending along its axial direction is formed on the outer wall of the rigid shaft (4a). The cross-section of the rigid shaft (4a) at the location of the planar portion (4a1) is at least partially "D" shaped. A plurality of anti-slip ribs (4a2) are formed on the planar portion (4a1) and are evenly distributed along its length direction.

9. A coastal windbreak seedling stabilization device according to claim 6, characterized in that, The outer wall of the elliptical cylindrical roller pin (4c) is provided with a second rubber anti-slip layer.

10. A coastal windbreak seedling stabilization device according to any one of claims 1-9, characterized in that, The lower end of the ground anchor (5) is formed with an insert rod (5a), and the outer wall of the insert rod (5a) is formed with a plurality of barbs (5a1) that are distributed circumferentially and extend obliquely upward.

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