A shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials

Abstract

The present invention discloses a shock-absorbing wheel with a auxetic metamaterial sandwich thickness gradient structure, which relates to the technical field of shock absorption for intelligent transport equipment. The wheel achieves shock absorption by dissipating energy simultaneously through the provision of three layers of concave four-reverse-chiral auxetic metamaterial sandwich structures with a coupled deformation mechanism, thereby ensuring dynamic protection of the wheel body against vibration and impact. The wheel adopts a thickness gradient design of multiple groups of concave four-reverse-chiral auxetic metamaterial sandwich structures, achieving step-by-step energy dissipation against vibration and impact through the three layers of different thicknesses. Simultaneously, the wheel axle is combined with the elastic recovery properties of the four-chiral auxetic metamaterial to maintain the stability of the wheel axle during continuous energy dissipation. The device significantly improves the anti-seismic stability of the transport equipment during operation, ensuring the safety of transported objects and improving transport efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorption of intelligent transport equipment, and in particular to a shock absorption wheel with a auxetic metamaterial sandwich thickness gradient structure. Background Art

[0002] With the acceleration of industrial automation, automated guided vehicles (AGVs) and rail-guided vehicles (RGVs) have become key equipment in smart manufacturing, logistics, and warehousing. Their core function is to achieve efficient and precise material transportation. However, in actual operation, these vehicles often face vibration and impact from complex road conditions (such as uneven surfaces, track joints, and small obstacles). Traditional rigid wheels or simple rubber tires have limited shock absorption capabilities, which easily transmit vibration to the vehicle body, leading to the following problems:

[0003] 1. Reduced operational stability: Vibration may affect the navigation accuracy of AGV / RGV, especially in precision manufacturing, where positioning deviations may lead to interruptions in the production process.

[0004] 2. Equipment and cargo damage: High-frequency vibrations may damage precision sensors or fragile cargo on board.

[0005] 3. Increased mechanical fatigue: Long-term impact loads will shorten the service life of the vehicle's drive system and structural components. Summary of the Invention

[0006] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials.

[0007] The present invention is achieved by constructing a shock-absorbing wheel with a auxetic metamaterial sandwich thickness gradient structure. The device includes a wheel body; the wheel body is fixedly connected to an axle at the center of the wheel body; the wheel body is specifically composed of a rubber layer and a concave four-anti-chiral auxetic metamaterial sandwich structure and a four-chiral auxetic metamaterial; four rubber layers are provided in the wheel body, and the thickness of the four rubber layers is distributed in a gradient from the outside to the inside, with the outermost layer being thicker and the layer near the center being thinner.

[0008] Preferably, an inwardly concave four-way reverse chiral auxetic metamaterial sandwich structure is arranged between two adjacent layers of the three groups of rubber layers on the outer side of the wheel body.

[0009] Preferably, a four-chiral auxetic metamaterial is arranged between a group of rubber layers on the innermost side of the wheel body and the wheel axle; the four-chiral auxetic metamaterial has a chiral structure and a rod structure with an outer side thereof being tangent at an angle of 90 degrees.

[0010] Preferably, the coupling mechanism of the indented four-antichiral auxetic metamaterial sandwich structure is a novel auxetic metamaterial with two mechanisms: indented deformation and rotational deformation, wherein the indented deformation is provided by the indented hexagonal structure and the rotational deformation is provided by the chiral structure.

[0011] Preferably, the concave structure of the concave four-antichiral auxetic metamaterial sandwich structure is formed by vertically combining two concave hexagons.

[0012] Preferably, the rotational deformation of the concave four-antichiral auxetic metamaterial sandwich structure is replaced by the antichiral rotation unit to replace the concave connection node, and the four-antichiral structure is embedded in the middle to increase the strength and stiffness of the structure.

[0013] Preferably, the inwardly concave four-antichiral auxetic metamaterial sandwich structure is made of rubber, with a memory alloy skeleton in the middle.

[0014] Preferably, the inwardly concave four-reverse chiral auxetic metamaterial sandwich structure is distributed in three layers, and the thickness changes gradually from the outside to the inside, with a larger thickness on the outer circle and a smaller thickness on the inner circle.

[0015] The present invention has the following advantages: The present invention provides a shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials through improvement, which has the following improvements compared with similar devices:

[0016] The shock-absorbing wheel of the present invention, having a sandwich thickness gradient structure of auxetic metamaterials, realizes a shock-absorbing function by dissipating energy simultaneously through the provision of three layers of concave four-reverse-chiral auxetic metamaterial sandwich structures with a coupled deformation mechanism, thereby ensuring dynamic protection of the wheel body against vibration and impact. A thickness gradient design is adopted for multiple groups of concave four-reverse-chiral auxetic metamaterial sandwich structures, achieving step-by-step energy dissipation against vibration and impact through the three layers of different thicknesses. Simultaneously, the elastic recovery properties of the four-chiral auxetic metamaterial are combined at the wheel axle to maintain the stability of the wheel axle during continuous energy dissipation. This device significantly improves the seismic stability of the transport equipment during operation, ensures the safety of transported objects, and improves transport efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the wheel body of the present invention;

[0019] Figure 3 The present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 Schematic diagram of the inward-concave four-antichiral auxetic metamaterial sandwich structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the four-chiral auxetic metamaterial of the present invention.

[0022] Among them: wheel body-1, axle-2, rubber layer-11, concave four-antichiral auxetic metamaterial sandwich structure-12, four-chiral auxetic metamaterial-13. DETAILED DESCRIPTION

[0023] The following is combined with Figures 1 to 5 The principles and features of the present invention are described, and the examples given are only for the purpose of explaining the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not to exact scale, and are only used for the purpose of conveniently and clearly assisting in illustrating the embodiments of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0026] See also Figures 1 to 5 The present invention provides a shock-absorbing wheel with a sandwich thickness gradient structure of a tensile metamaterial, comprising a wheel body 1; a wheel axle 2 is fixedly connected to the center of the wheel body 1; the wheel body 1 is specifically composed of a rubber layer 11, a concave four-antichiral tensile metamaterial sandwich structure 12, and a four-chiral tensile metamaterial 13; four rubber layers 11 are arranged in the wheel body 1, and the thickness of the four rubber layers 11 is gradiently distributed from the outside to the inside, with the outermost layer being thicker and the layer near the center being thinner.

[0027] An inwardly concave four-chiral auxetic metamaterial sandwich structure 12 is arranged between two adjacent layers of the three groups of rubber layers 11 on the outer side of the wheel body 1; a four-chiral auxetic metamaterial 13 is arranged between the innermost group of rubber layers 11 on the wheel body 1 and the axle 2; the four-chiral auxetic metamaterial 13 has a chiral structure and a rod structure with a 90-degree tangent angle to its outer side.

[0028] Coupling mechanism of the concave four-antichiral auxetic metamaterial sandwich structure 12 The new auxetic metamaterial has two mechanisms: concave deformation and rotational deformation, where the concave deformation is provided by the concave hexagonal structure and the rotational deformation is provided by the chiral structure.

[0029] The concave structure of the concave four-antichiral traction metamaterial sandwich structure 12 is composed of two concave hexagons vertically combined; the rotational deformation of the concave four-antichiral traction metamaterial sandwich structure 12 is replaced by the concave connection node by the antichiral rotation unit, and the four-antichiral structure is embedded in the middle to increase the strength and stiffness of the structure.

[0030] The inward-concave four-anti-chiral traction metamaterial sandwich structure 12 is made of rubber and has a memory alloy skeleton in the middle; the inward-concave four-anti-chiral traction metamaterial sandwich structure 12 is distributed in three layers, and the thickness changes gradually from the outside to the inside, with a large outer thickness and a small inner thickness.

[0031] The working principle of the shock-absorbing wheel based on the above-mentioned auxetic metamaterial sandwich thickness gradient structure is as follows:

[0032] When using this device, when the wheel body 1 is affected by external forces and undergoes a deformation process, the three-layer concave four-reverse chiral traction metamaterial sandwich structure 12 with a coupled deformation mechanism is set to simultaneously dissipate energy to achieve a shock absorption function, ensuring that the wheel body 1 can obtain dynamic protection under the action of vibration and impact; at the same time, a thickness gradient design of multiple groups of concave four-reverse chiral traction metamaterial sandwich structures 12 is adopted to achieve step-by-step energy dissipation of vibration and impact through different thickness designs; at the same time, the elastic recovery performance of the four-chiral traction metamaterial 13 is combined at the wheel axle 2 to maintain the stability of the wheel axle 2 during continuous energy dissipation; this device significantly improves the seismic stability of the carrying equipment during operation, ensures the safety of transported objects, and improves transportation efficiency.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0034] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials, characterized by: The wheel body (1) comprises a wheel body (1); the wheel body (1) is fixedly connected to a wheel axle (2) at the center thereof; the wheel body (1) is specifically composed of a rubber layer (11), a concave four-anti-chiral auxetic metamaterial sandwich structure (12), and a four-chiral auxetic metamaterial (13); four rubber layers (11) are arranged in the wheel body (1), and the thickness of the four rubber layers (11) is distributed in a gradient from the outside to the inside, with the outermost layer being thicker and the layer near the center being thinner; An inwardly concave four-antichiral auxetic metamaterial sandwich structure (12) is arranged between two adjacent layers of the three groups of rubber layers (11) on the outside of the wheel body (1); A four-chiral auxetic metamaterial (13) is arranged between a group of rubber layers (11) on the innermost side of the wheel body (1) and the wheel axle (2); the four-chiral auxetic metamaterial (13) is a rod structure in a state of being tangent to the outer side thereof at an angle of 90 degrees; The coupling mechanism of the indented four-anti-chiral auxetic metamaterial sandwich structure (12) is that the auxetic metamaterial has two mechanisms: indented deformation and rotational deformation, wherein the indented deformation is provided by the indented hexagonal structure and the rotational deformation is provided by the chiral structure; The concave structure of the concave four-antichiral auxetic metamaterial sandwich structure (12) is formed by vertically combining two concave hexagons; The rotational deformation of the concave four-antichiral traction metamaterial sandwich structure (12) is achieved by replacing the concave connection nodes with antichiral rotation units, while a four-antichiral structure is embedded in the middle to increase the strength and stiffness of the structure; The inwardly concave four-antichiral traction metamaterial sandwich structure (12) is made of rubber and has a memory alloy skeleton in the middle; The inward-concave four-antichiral tensile metamaterial sandwich structure (12) is distributed in three layers, and the thickness changes gradually from the outside to the inside, with a large thickness on the outer circle and a small thickness on the inner circle.

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