Damping wheel of auxetic metamaterial sandwich thickness gradient structure

Abstract

The invention discloses a damping wheel of an auxetic metamaterial sandwich thickness gradient structure, relates to the technical field of intelligent carrying equipment damping, and achieves a damping function by arranging three layers of concave four-reverse-chirality auxetic metamaterial sandwich structures with a coupling deformation mechanism and conducting energy consumption at the same time. It is ensured that the wheel body can obtain dynamic protection under the vibration impact effect; the thickness gradient design of a multi-group concave four-reverse chiral auxetic metamaterial sandwich structure is adopted, and step-by-step energy consumption of vibration impact is achieved through three-layer different-thickness design; meanwhile, the axle is combined with the elastic recovery performance of the four-chiral auxetic metamaterial, so that the stability of the axle is maintained in the continuous energy consumption process; the anti-seismic stability of the carrying equipment in the operation process is remarkably improved, the safety of conveyed objects is guaranteed, and the conveying efficiency is improved.

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 traction metamaterial sandwich thickness gradient structure. Background Art

[0002] With the acceleration of industrial automation, automatic guided vehicles and rail-guided vehicles have become key equipment in the fields of intelligent manufacturing, logistics and warehousing. Their core function is to achieve efficient and accurate transportation of materials. However, in actual operation, vehicles often face vibration and impact problems caused by complex road conditions (such as uneven ground, track joints, small obstacles, etc.). Traditional rigid wheels or simple rubber tires have limited shock absorption capabilities and are prone to transmit vibration to the vehicle body, leading to the following problems: 1. Reduced operational stability: Vibration may affect the navigation accuracy of AGV / RGV, especially in precision manufacturing, where positioning deviation may lead to interruption of production process; 2. Equipment and cargo damage: High-frequency vibration may damage vehicle-mounted precision sensors or fragile cargo; 3. Increased mechanical fatigue: Long-term impact loads will shorten the service life of the vehicle's drive system and structural parts. Summary of the invention

[0003] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials.

[0004] The present invention is implemented in this way: a shock-absorbing wheel with a sandwich thickness gradient structure of a tensile metamaterial is constructed, and the device includes a wheel body; a wheel axle is fixedly connected at the center of the wheel body; the wheel body is specifically composed of a rubber layer and a concave four-reverse chiral tensile metamaterial sandwich structure and a four-chiral tensile metamaterial; four rubber layers are arranged in the wheel body, and the thickness of the four rubber layers is gradiently distributed from the outside to the inside, with the outermost layer being thicker and the layer close to the center being thinner.

[0005] Preferably, an inwardly concave four-reverse chiral traction metamaterial sandwich structure is arranged between two adjacent layers of the three groups of rubber layers on the outer side of the wheel body.

[0006] Preferably, a four-chiral traction metamaterial is arranged between a group of rubber layers on the innermost side of the wheel body and the wheel axle; the four-chiral traction metamaterial has a chiral structure and a rod structure in a 90-degree tangent state to its outer side.

[0007] Preferably, the coupling mechanism of the novel auxetic metamaterial sandwich structure of the indented four-anti-chiral auxetic metamaterial has two mechanisms of 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.

[0008] Preferably, the concave structure of the concave four-antichiral auxetic metamaterial sandwich structure is formed by vertically combining two concave hexagons.

[0009] Preferably, the rotational deformation of the concave four-anti-chiral traction metamaterial sandwich structure is replaced by the anti-chiral rotation unit to replace the concave connection node, and at the same time, the four-anti-chiral structure is embedded in the middle to increase the strength and stiffness of the structure.

[0010] Preferably, the inwardly concave four-reverse chiral traction metamaterial sandwich structure is made of rubber, with a memory alloy skeleton in the middle.

[0011] Preferably, the inwardly concave four-reverse chiral traction metamaterial sandwich structure 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.

[0012] 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 the same type of equipment: The shock-absorbing wheel of the sandwich thickness gradient structure of traction metamaterial described in the present invention realizes the shock-absorbing function by arranging three layers of concave four-reverse-chirality traction metamaterial sandwich structures with coupled deformation mechanisms to dissipate energy simultaneously, thereby ensuring that the wheel body can obtain dynamic protection under the action of vibration impact; adopts a thickness gradient design of multiple groups of concave four-reverse-chirality traction metamaterial sandwich structures, and realizes step-by-step energy dissipation of vibration impact through three layers of different thickness design; at the same time, the elastic recovery performance of the four-chirality traction metamaterial is combined at the wheel axle to maintain the stability of the wheel axle during continuous energy dissipation; the device significantly improves the seismic stability of the carrier during operation, ensures the safety of the transported objects, and improves the transport efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the wheel body of the present invention; Figure 3 The present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 This is a schematic diagram of the structure of the concave four-reverse chiral auxetic metamaterial sandwich structure of the present invention; Figure 5 It is a schematic diagram of the structure of the four-chiral traction metamaterial of the present invention.

[0014] Among them: wheel body-1, axle-2, rubber layer-11, concave four-anti-chiral traction metamaterial sandwich structure-12, four-chiral traction metamaterial-13. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1~Figure 5The principles and features of the present invention are described, and the examples given are only used to explain the present invention and are not used to limit the scope of the present invention. In the following paragraphs, the present invention is described 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 in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of the embodiments of the present invention based on its overall structure.

[0018] See also Figure 1~Figure 5 A shock-absorbing wheel with a sandwich thickness gradient structure of a tensile metamaterial of the present invention comprises 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-reverse chiral 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 distributed in a gradient from the outside to the inside, with the outermost layer being thicker and the layer near the center being thinner.

[0019] An inwardly concave four-reverse chiral traction 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 traction metamaterial 13 is arranged between the innermost group of rubber layers 11 of the wheel body 1 and the axle 2; the four-chiral traction metamaterial 13 is a rod structure in a state of being tangent to the outer side at an angle of 90 degrees.

[0020] Coupling mechanism of the concave four-anti-chiral traction metamaterial sandwich structure 12 The new traction metamaterial has two mechanisms: concave deformation and rotational deformation, in which the concave deformation is provided by the concave hexagonal structure and the rotational deformation is provided by the chiral structure.

[0021] The concave structure of the concave four-anti-chiral traction metamaterial sandwich structure 12 is composed of two concave hexagons vertically combined; the rotational deformation of the concave four-anti-chiral traction metamaterial sandwich structure 12 is replaced by the concave connection node by the anti-chiral rotation unit, and at the same time, the four anti-chiral structures are embedded in the middle to increase the strength and stiffness of the structure.

[0022] The inward-concave four-reverse-chiral traction metamaterial sandwich structure 12 is made of rubber, with a memory alloy skeleton in the middle; the inward-concave four-reverse-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.

[0023] The working principle of the shock-absorbing wheel based on the above-mentioned auxetic metamaterial sandwich thickness gradient structure is: When the device is used, when the wheel body 1 is deformed by external force, three layers of inwardly concave four-reverse-chiral traction metamaterial sandwich structures 12 with coupled deformation mechanisms are set to dissipate energy at the same time to achieve the shock absorption function, ensuring that the wheel body 1 can obtain dynamic protection under the action of vibration impact; at the same time, a thickness gradient design of multiple groups of inwardly concave four-reverse-chiral traction metamaterial sandwich structures 12 is adopted, and the step-by-step energy dissipation of vibration impact is achieved 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; the device significantly improves the seismic stability of the carrier during operation, ensures the safety of the transported objects, and improves the transport efficiency.

[0024] 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 the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather 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 of the circle; the wheel body (1) is specifically composed of a rubber layer (11), an inwardly concave four-reverse chiral traction metamaterial sandwich structure (12), and a four-chiral traction 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 closer to the center being thinner.

2. According to claim 1, a shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials, characterized in that: An inwardly concave four-reverse chiral traction 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).

3. According to claim 2, a shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials, characterized in that: 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.

4. According to claim 3, a shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials, characterized in that: The coupling mechanism of the inward-concave four-anti-chiral traction metamaterial sandwich structure (12) is that the novel traction metamaterial has two mechanisms: inward-concave deformation and rotational deformation, wherein the inward-concave deformation is provided by the inward-concave hexagonal structure and the rotational deformation is provided by the chiral structure.

5. The shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials according to claim 4, characterized in that: The concave structure of the concave four-antichiral traction metamaterial sandwich structure (12) is formed by vertically combining two concave hexagons.

6. The shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials according to claim 5, characterized in that: The rotational deformation of the concave four-anti-chiral traction metamaterial sandwich structure (12) is achieved by replacing the concave connection nodes with anti-chiral rotation units, while a four-anti-chiral structure is embedded in the middle, thereby increasing the strength and stiffness of the structure.

7. The shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials according to claim 6, characterized in that: The inwardly concave four-reverse chiral traction metamaterial sandwich structure (12) is made of rubber and has a memory alloy skeleton in the middle.

8. The shock-absorbing wheel with a sandwich thickness gradient structure of auxetic metamaterials according to claim 7, characterized in that: The inwardly concave four-reverse chiral tensile expansion metamaterial sandwich structure (12) is distributed in three layers, and the thickness changes gradually from the outside to the inside, with a large thickness at the outer edge and a small thickness at the inner circle.

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