Artificial turf with elasticity in gradient distribution

Abstract

The utility model discloses an elastic gradient distribution artificial turf, which relates to the field of artificial turfs, and has the technical scheme that the elastic gradient distribution artificial turf comprises a high-elasticity layer, a buffer transition layer and a stable support layer which are sequentially arranged from top to bottom, and the elastic coefficients of the three-layer structure are gradually reduced in a gradient manner along the thickness direction; the upper surface of the high-elasticity layer is fixedly connected with the grass yarn layer, the lower surface of the high-elasticity layer is connected with the buffer transition layer, and the lower surface of the buffer transition layer is connected with the stable supporting layer. When the lawn bears load, gradient mechanical response of'surface layer flexible buffering-middle layer energy absorption-bottom layer rigid supporting 'is shown, and the functional requirements of systematically balancing comfortable foot feeling, buffering protection and stable supporting are met.

Description

An artificial turf with an elastic gradient distribution Technical Field

[0001] This utility model relates to the field of artificial turf, and more specifically, to an artificial turf with an elastic gradient distribution. Background Technology

[0002] Artificial turf is a simulated ground cover material made of high-molecular polymer materials. It typically uses synthetic fibers such as polypropylene (PP) and polyethylene (PE) as raw materials for grass fibers, which are fixed to a base through processes such as drawing, weaving, and tufting, and its stability is enhanced by a backing adhesive process. It features a natural appearance, bright colors, and a feel close to natural grass, while also possessing excellent properties such as wear resistance, weather resistance, and UV resistance, allowing for long-term use in various climatic conditions.

[0003] Traditional artificial turf typically employs a single-layer, uniform base structure, lacking a gradient in elasticity along its thickness. This results in an inability to effectively balance comfort, cushioning, and stable support. In practical applications, this single elastic distribution is particularly problematic: when the overall elastic modulus of the artificial turf is high (e.g., using a high-elasticity foam base), while it can provide a soft feel through a large initial deformation (typically >1.0mm), the base lacks sufficient ankle support stiffness during exercise, easily leading to excessive lateral displacement and increasing the risk of sprains by over 30%. Conversely, when the base uses low-elasticity polymer materials (e.g., a polypropylene layer with a Shore hardness >Shore D 70), while providing stable support, its impact absorption capacity is weak (impact absorption rate <50%), resulting in a harsh feel and significant vibration transmission. Long-term use can easily lead to exercise fatigue in the knees, lumbar spine, and other areas.

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes an artificial turf with an elastic gradient distribution. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an artificial turf with an elastic gradient distribution.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an artificial turf with an elastic gradient distribution, comprising a high elasticity layer, a buffer transition layer, and a stable support layer arranged sequentially from top to bottom, wherein the elastic coefficient of the three layers decreases in a gradient direction along the thickness direction; the upper surface of the high elasticity layer is fixed to the grass fiber layer, the lower surface is connected to the buffer transition layer, and the lower surface of the buffer transition layer is connected to the stable support layer.

[0007] Preferably, the upper surface of the highly elastic layer is provided with a protruding structure, which includes a hemispherical, frustum-shaped, or columnar shape.

[0008] Preferably, the buffer transition layer has uniformly distributed reinforcing ribs, which are mesh structures made of glass fiber, carbon fiber or aramid fiber.

[0009] Preferably, the bottom of the stabilizing support layer is provided with fixing nails to securely fix it to the ground.

[0010] Preferably, the stable support layers between the artificial turf are connected by a lifting buckle assembly.

[0011] Preferably, grooves are provided on both sides of the stable support layer, and the lifting buckle assembly includes a telescopic rod fixed on the bottom wall of the groove. One end of the telescopic rod on the artificial turf is equipped with a mounting slot, and the other end is equipped with an elastic buckle that matches the mounting slot.

[0012] Preferably, a magnet A is fixedly connected to the top of the slot seat and the elastic buckle, and a magnet B that attracts the magnet A is fixedly connected to the inner top wall of the groove.

[0013] Preferably, the high-elasticity layer adopts an elastic fiber woven structure, the buffer transition layer is a porous foam structure, the stabilizing support layer is a polymer material layer, and the high-elasticity layer and the buffer transition layer, and the buffer transition layer and the stabilizing support layer are bonded together by adhesive.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention achieves a technological breakthrough by designing the lawn base as a three-layer composite structure with decreasing elasticity gradient. When the lawn is subjected to load, it exhibits a gradient mechanical response of "soft buffer on the surface - energy absorption in the middle layer - rigid support in the bottom layer". It systematically balances the functional requirements of comfortable foot feel, buffer protection and stable support, and solves the problems of high risk of sports injury and poor user experience caused by the single elasticity of traditional single-layer structures.

[0016] This invention can effectively increase the roughness of the contact interface through a three-dimensional raised structure. By increasing the static friction resistance between the sole of the foot and the grass, it can significantly reduce the risk of slipping and tipping during exercise, and is especially suitable for sports scenarios involving high-speed running or frequent changes of direction.

[0017] The stable support layer between artificial turf ... Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of this utility model (artificial turf equipped with a card slot).

[0020] Figure 2 is a schematic diagram of the bottom structure of the present invention as shown in Figure 1;

[0021] Figure 3 is an enlarged view of part A of the structure in Figure 1 of this utility model;

[0022] Figure 4 is a schematic diagram of the artificial turf of this utility model equipped with a card slot and an elastic buckle;

[0023] Figure 5 is a schematic diagram of the specific structure of this utility model from another angle, as shown in Figure 4.

[0024] In the diagram: 1. High elasticity layer; 2. Buffer transition layer; 3. Stable support layer; 4. Protruding structure; 5. Fixing nail; 6. Lifting buckle assembly; 601. Telescopic rod; 602. Card slot seat; 603. Elastic buckle; 604. Magnet A; 605. Magnet B; 7. Groove. Detailed Implementation

[0025] As shown in Figures 1-5, this utility model provides an artificial turf with an elastic gradient distribution, comprising a high-elasticity layer 1, a buffer transition layer 2, and a stable support layer 3 arranged sequentially from top to bottom. The elastic coefficient of the three layers decreases gradually along the thickness direction. The upper surface of the high-elasticity layer 1 is fixed with a grass fiber layer, and the lower surface is connected to the buffer transition layer 2. The lower surface of the buffer transition layer 2 is connected to the stable support layer 3. The high-elasticity layer 1 adopts an elastic fiber woven structure, the buffer transition layer 2 is a porous foam structure, and the stable support layer 3 is a polymer material layer. The high-elasticity layer 1 and the buffer transition layer 2, and the buffer transition layer 2 and the stable support layer 3 are bonded together with adhesives.

[0026] This invention achieves a technological breakthrough by designing the lawn base as a three-layer composite structure with decreasing elasticity gradient: the upper high-elasticity layer 1 adopts an elastic fiber woven structure, utilizing its flexible material properties (such as the high extensibility of polyurethane elastic fibers) to provide initial cushioning deformation (0.8-1.2mm), meeting the comfort requirements of foot contact; the middle cushioning transition layer 2 uses a porous foam structure (such as polyethylene foam) as a carrier, absorbing 70%-80% of the impact energy through the uniformly distributed pore structure, and achieving a smooth transition from high elasticity to low elasticity by utilizing the intermediate value of the material's elastic modulus (20-40MPa), avoiding abrupt changes in interlayer stress; the lower stable support layer 3 uses a high-molecular polymer material (such as polypropylene with a Shore D50-70) to form a rigid base, providing stable support stiffness by controlling residual deformation (≤0.3mm), and suppressing excessive lateral displacement. The three-layer structure is bonded together with adhesive to form a whole. The elastic coefficient decreases along the thickness direction from 50-80MPa (high elasticity layer 1) to 20-40MPa (buffer transition layer 2) and then to 50-100MPa (stabilizing support layer 3, corresponding to Shore hardness). This allows the lawn to exhibit a gradient mechanical response of "soft buffer on the surface - energy absorption in the middle layer - rigid support in the bottom layer" when bearing load, systematically balancing the functional requirements of comfortable foot feel, cushioning protection and stable support.

[0027] Furthermore, the upper surface of the high-elasticity layer 1 is provided with a raised structure 4, which includes hemispherical, frustum-shaped, or columnar shapes. The three-dimensional raised structure 4 can effectively increase the roughness of the contact interface (increasing the surface friction coefficient by 18% to 25%), significantly reducing the risk of slipping and tipping during exercise by increasing the static friction resistance between the sole of the foot and the grass. It is especially suitable for high-speed running or sports scenarios with frequent changes of direction. Secondly, the buffer transition layer 2 has uniformly distributed reinforcing ribs, which are mesh structures made of glass fiber, carbon fiber, or aramid fiber. The performance is enhanced through the composite structure of high-strength fiber and porous foam: on the one hand, the mesh structure can increase the tear resistance of the buffer layer by 30% to 50%, effectively resisting the risk of internal cracking under high-frequency impacts, which is especially suitable for long-term use of sports fields; on the other hand, the fiber mesh uniformly distributes the load (reducing stress concentration by more than 40%), so that the impact energy is distributed through foam deformation and fiber The dual-mechanism tension dissipation avoids structural failure caused by local overload. Furthermore, the mesh framework guides the foam cells to maintain uniform compression under stress, preserving the stability of the cushioning performance. It also enhances the bonding strength between the cushioning layer and the upper and lower layers, reducing the risk of delamination. This improves the overall durability and reliability of the artificial turf structure without significantly increasing weight. Moreover, the bottom of the stable support layer 3 is equipped with fixing nails 5 for secure fixation to the ground, achieving a reliable connection between the turf and the ground through mechanical anchoring. This provides stable pull-out resistance, effectively resisting turf displacement or curling caused by wind and sports impacts, making it particularly suitable for high-frequency outdoor use. It also suppresses base deformation and reduces interlayer stress concentration through uniform layout and rigid synergy with the support layer. Simultaneously, it accommodates both temporary disassembly and permanent fixation needs, acting only on the rigid support layer without affecting the comfortable feel and cushioning function of the upper elastic structure, thus balancing stability and scene adaptability.

[0028] Meanwhile, the stable support layer 3 between the artificial turf of this utility model is connected by the lifting buckle assembly 6, so that multiple artificial turf can be connected into a whole, effectively resisting the separation of the panels caused by external forces.

[0029] The stable support layer 3 has grooves 7 on both sides. The lifting buckle assembly 6 includes a telescopic rod 601 fixed on the bottom wall of the groove 7. The head of the telescopic rod 601 on the artificial turf is equipped with a slot seat 602 and an elastic buckle 603 that matches the slot seat 602. The top of the slot seat 602 and the elastic buckle 603 are fixedly connected to a magnet A604. The top wall of the groove 7 is fixedly connected to a magnet B605 that attracts the magnet A604.

[0030] During installation, first fix the artificial turf equipped with the slot seat 602 to the ground (drive the fixing nail 5 into the ground). Then, insert the elastic buckle 603 of another artificial turf equipped with an elastic buckle 603 into the slot seat 602 on the artificial turf (at this time, both the elastic buckle 603 and the slot seat 602 are at the top of the groove 7, that is, the magnet A604 is close to the magnet B605, and the attraction between the two can simply fix the position of the elastic buckle 603 and the slot seat 602). In this way, the slot seat 602 and the elastic buckle 603 are embedded and installed through the groove 7, avoiding gaps in the artificial turf. When the elastic buckle 603 is inserted into the slot... After the second artificial turf is installed in seat 602 (the elastic buckle 603 deforms under stress, and force can be applied to insert or remove the elastic buckle 603 and the slot seat 602), the fixing nail 5 at the bottom of the second artificial turf can be inserted into the ground to secure it. At this time, the elastic buckle 603 and the slot seat 602, which are locked together, will be moved downwards, causing magnets A604 and B605 to separate. The telescopic rod 601 will then shorten to allow space for the second artificial turf to move downwards, thus completing the installation of the second artificial turf. In this way, multiple artificial turf pieces can be connected into a whole, effectively resisting the separation of the pieces caused by external forces.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A resiliently gradient-distributed artificial turf, characterized by: The structure includes a high elastic layer (1), a buffer transition layer (2), and a stable support layer (3) arranged sequentially from top to bottom. The elastic coefficient of the three-layer structure decreases in a gradient along the thickness direction. The upper surface of the high elastic layer (1) is fixed with a grass fiber layer, and the lower surface is connected to the buffer transition layer (2). The lower surface of the buffer transition layer (2) is connected to the stable support layer (3).

2. The elastic gradient distribution artificial turf according to claim 1, characterized in that: The upper surface of the high elastic layer (1) is provided with a protruding structure (4), which includes a hemispherical, frustum-shaped or columnar shape.

3. The artificial turf with an elastic gradient distribution according to claim 1, characterized in that: The buffer transition layer (2) has uniformly distributed reinforcing ribs, which are mesh structures made of glass fiber, carbon fiber or aramid fiber.

4. The artificial turf with an elastic gradient distribution according to claim 1, characterized in that: The bottom of the stable support layer (3) is provided with fixing nails (5) to securely fix it to the ground.

5. The elastic gradient distribution artificial turf according to claim 1, characterized in that: The stable support layers (3) between the artificial turf are connected by a lifting buckle assembly (6).

6. The artificial turf of elastic gradient distribution according to claim 5, characterized in that: The stable support layer (3) has grooves (7) on both sides. The lifting buckle assembly (6) includes a telescopic rod (601) fixed on the bottom wall of the groove (7). The telescopic rod (601) on the artificial turf is connected to each other. One of the heads of the telescopic rod (601) is equipped with a slot seat (602), and the other is equipped with an elastic buckle (603) that matches the slot seat (602).

7. The artificial turf with an elastic gradient distribution according to claim 6, characterized in that: The top of the slot seat (602) and the elastic buckle (603) are fixedly connected to a magnet A (604), and a magnet B (605) that attracts the magnet A (604) is fixedly connected to the inner top wall of the groove (7).

8. The elastic gradient distribution artificial turf according to claim 1, characterized in that: The high elastic layer (1) adopts an elastic fiber woven structure, the buffer transition layer (2) is a porous foam structure, the stable support layer (3) is a polymer material layer, and the high elastic layer (1) and the buffer transition layer (2), and the buffer transition layer (2) and the stable support layer (3) are bonded together by adhesive.

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