CN217170382U - Non-pneumatic tire based on triangular chiral negative Poisson's ratio structure - Google Patents
Non-pneumatic tire based on triangular chiral negative Poisson's ratio structure Download PDFInfo
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- CN217170382U CN217170382U CN202220929342.1U CN202220929342U CN217170382U CN 217170382 U CN217170382 U CN 217170382U CN 202220929342 U CN202220929342 U CN 202220929342U CN 217170382 U CN217170382 U CN 217170382U
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The utility model discloses a non-pneumatic tire based on a triangular chiral negative Poisson ratio structure, which comprises an outer tire surface, a triangular chiral negative Poisson ratio support body and a rim; the triangular chiral negative Poisson ratio support body is arranged on the outer side of the rim, and the tread is arranged on the outer side of the angular chiral negative Poisson ratio support body. The utility model discloses a triangle chirality negative poisson ratio supporter receives vertical load after, and the flexible beam stretches because of negative poisson ratio effect to play effects such as bearing, shock attenuation, be favorable to the ride comfort of vehicle driving. In particular, the triangular chiral negative poisson ratio support body has uniform deformation and large lateral rigidity, and compared with a common non-pneumatic tire, the driving comfort is obviously improved. The utility model discloses a triangle chirality burden poisson is than the structure has inherited the crack propagation that traditional burden poisson is lower than the structure and the outstanding performance of suitable acoustics action to compensatied general non-pneumatic tire not durable, the great shortcoming of noise.
Description
Technical Field
The utility model relates to a non-pneumatic tire structure.
Background
Tires are indispensable parts of vehicles, and performance requirements of tires are safety, durability, economy, comfort, and the like, of which safety performance of tires is most critical. In the pneumatic tire mainly comprising a radial tire in the market at present, the tire crown is supported by sealing and compressing air by using rubber and a rim. Thus, although the pneumatic tire is excellent in performance, it has the drawbacks of puncture, air leakage, and tire burst. Non-pneumatic tires, which rely on their own materials and structures to replace inflation pressure, are therefore being produced.
Generally, although the non-pneumatic tire provides various conveniences while solving the problem of tire burst, the non-pneumatic tire also has the disadvantages of poor damping, load-bearing, and heat dissipation effects. For example, chinese utility model patent publication No. CN21186980U, publication No. 202.11.06, discloses a negative poisson's ratio-based non-inflatable vehicle, and the negative poisson's ratio support represented by this utility model is complicated in structure, cumbersome in installation, and not conducive to manufacturing, and therefore further optimization and improvement are to be awaited.
The auxetic structure is a structure having a negative poisson's ratio under mechanical loading. When pulled (compressed), they expand (contract) laterally. This unusual behavior is caused by their particular geometry and arrangement of internal supports. Studies have shown that negative poisson's ratio structures can improve the mechanical properties of the structure, including greater toughness, higher energy absorption and dissipation, greater shear modulus, lower crack propagation, and proper acoustic behavior. Due to these advantages, the negative poisson's ratio structure has been applied to various fields. Among the numerous auxetic structures, chiral structures have also attracted the attention of researchers. Lakes first proposed an eccentrically symmetric structure in a chiral hexagonal microstructure. The structure consists of a circular rigid body at the center and 6 flexible beams tangential to the rigid body, similar to the left and right hands of a human being, and is also called a chiral structure. At present, a negative poisson ratio structure is applied to the field of non-pneumatic wheels, but basically a periodic continuous spoke is taken as a main part, and a chiral structure with excellent performance is not paid enough attention.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above prior art, a non-pneumatic tire based on a triangular chiral negative poisson's ratio structure is provided, which has a light weight and a simple structure, can bear large deformation, and can ensure the smoothness of driving a vehicle.
The technical scheme is as follows: a non-pneumatic tire based on a triangular chiral negative Poisson's ratio structure comprises an outer tire surface, a triangular chiral negative Poisson's ratio support body and a rim; the triangular chiral negative Poisson's ratio supporting body is arranged on the outer side of the rim, and the tread is arranged on the outer side of the angular chiral negative Poisson's ratio supporting body.
Furthermore, the triangular chiral negative Poisson ratio support body comprises a triangular central rigid body and 3 tangent flexible beams, wherein the side length of the triangular central rigid body is equal to that of the triangular central rigid bodylOf equilateral triangle structure, the length of the flexible beam beingl2; translating the triangle central rigid body to the right upper side along the straight line of the left side of the trianglelA new triangle center rigid body is obtained by the distance of 2; then the new triangle center rigid body is translated to the left upper side along the right straight linelA third triangle center rigid body is obtained by the distance of 2; the passing length between each side of each triangular central rigid body on the same straight line islThe flexible beams are connected, and new triangular central rigid bodies are continuously formed in sequence according to the rule; and finally, respectively taking a midpoint connecting line of flexible beams at the bottom edges of the triangular central rigid bodies positioned on the same side as a central axis, and respectively carrying out mirror image structures towards the left side and the right side so as to form a complete structure of the triangular chiral negative Poisson's ratio support.
Further, the triangular chiral negative poisson ratio support body is embedded into the outer tread through a triangular central rigid body at the top and is bonded and reinforced by an adhesive; the rim is provided with a positioning hole or a groove, the triangular chiral negative Poisson ratio support body is embedded into the positioning hole or the groove through a flexible beam which is connected with the side of a triangular central rigid body at the bottom downwards to be connected with the rim, and the flexible beam is bonded and reinforced by an adhesive.
Furthermore, in the triangular chiral negative poisson's ratio support body arranged around the rim, the bottom edges of all triangular central rigid bodies in the same layer are positioned on a circular ring with the same diameter, a three-ring circular ring structure is formed in a conformal mode, and the number of the triangular central rigid bodies in the circular ring with the same diameter is more than or equal to 24.
Has the advantages that: the utility model discloses a triangle chirality negative poisson ratio supporter between rim and the tyre tread has replaced traditional pneumatic tire's inflation pressure, has avoided the risk of blowing out, has greatly improved the security performance of tire. General negative poisson ratio spoke structure is complicated, makes processing difficulty, and the utility model discloses a chiral structure is simple, adopts injection molding or 3D printing technique, and production simple process, efficient. Under the general working condition, after the triangular chiral negative Poisson ratio support body is subjected to vertical load, the flexible beam stretches due to the negative Poisson ratio effect, so that the effects of bearing, damping and the like are achieved, and the smoothness of vehicle driving is facilitated. In particular, the triangular chiral negative poisson ratio support body has uniform deformation and large lateral rigidity, and compared with a common non-pneumatic tire, the driving comfort is obviously improved. The utility model discloses a triangle chirality burden poisson is than the structure has inherited the crack propagation that traditional burden poisson is lower than the structure and the outstanding performance of suitable acoustics action to compensatied general non-pneumatic tire not durable, the great shortcoming of noise.
Drawings
FIG. 1 is a perspective view of a non-pneumatic tire according to the present invention;
FIG. 2 is a schematic view of a support structure for a non-pneumatic tire according to the present invention;
fig. 3 is a schematic cross-sectional view and a partially enlarged view of the non-pneumatic tire of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a non-pneumatic tire based on triangle chirality negative poisson ratio structure, including tread 1, triangle chirality negative poisson ratio supporter 2 and rim 3. The triangular chiral negative poisson's ratio support body 2 is arranged on the outer side of the rim 3, and the tread surface 1 is arranged on the outer side of the angular chiral negative poisson's ratio support body 2. The utility model discloses a triangle chirality negative poisson ratio supporter has replaced traditional pneumatic tire's inflation pressure, can play and bear, absorbing effect, has guaranteed vehicle driving's ride comfort, can be through stable, even deformation again to and outstanding lateral rigidity provides good driving comfort, this structure has lower crack propagation and the outstanding performance of suitable acoustics action moreover, thereby compensatied general non-pneumatic tire not durable, the great shortcoming of noise. Compare in the non-pneumatic tire of other negative poisson ratio structures, the utility model discloses when having guaranteed excellent performance, the structure is simpler, the manufacturing of being convenient for.
As shown in fig. 2 and 3, the triangular chiral negative poisson's ratio support body 2 is optimized according to a three-tangential-beam chiral structure. Chiral structure (Chiral structure), an eccentric symmetric structure proposed by LAKES in 1991, generally consists of a centrally located circular rigid body and a plurality of flexible beams tangential thereto. A variety of chiral structures can be obtained by varying the number of flexible beams, the shape of the central rigid body, and the alignment and mirror image of the whole. The utility model discloses a triangle chirality negative poisson ratio supports knot is the three tangential roof beam handiness structures of an optimization that constitute basic unit by triangle-shaped center rigid body and 3 tangent flexible roof beams with it. The finite element analysis structure shows that the energy absorption capacity of the structure is 3 times of that of the traditional three-tangential-beam chiral structure with a circular center, and the deformation is more stable.
The triangular chiral negative poisson's ratio support body 2 can be made of polyurethane or heat-resistant engineering resin according to the requirement of the tire, and can be formed in one step by adopting an injection molding method or by adopting a process fused deposition manufacturing technology (FDM). As shown in fig. 2, the structure of the triangular chiral negative poisson's ratio support is obtained by translating and mirroring a basic unit body consisting of a triangular central rigid body and 3 flexible beams tangent to the triangular central rigid body. In particular toThe triangle central rigid body is an equilateral triangle structure, and the side length can be finely adjusted according to the specification of the non-pneumatic tire in specific implementationlThe length of 3 flexible beams tangent to the flexible beams is half of the side length of a triangle, and the two flexible beams form a basic unit body shown on the left side of the figure 2; then the triangle central rigid body is translated to the right upper part along the straight line of the left side of the trianglelA new triangle center rigid body is obtained by the distance of 2; then the new triangle center rigid body is translated to the left upper side along the straight line of the right sidelA third triangle center rigid body is obtained by a distance of 2; the passing length of each triangle central rigid body between each side on the same straight line islThe flexible beams are connected, and the flexible beams continue to grow in sequence according to the rule to form a new triangular central rigid body; and finally, respectively taking a midpoint connecting line of flexible beams at the bottom edges of the triangular central rigid bodies positioned on the same side as a central axis, and respectively carrying out mirror image structures towards the left side and the right side, thereby forming the complete structure of the triangular chiral negative poisson ratio support body on the right side of the figure 2.
As shown in fig. 1 and 3, when the triangular chiral negative poisson's ratio support 2 is connected to the tread 1 and the rim 3, the triangular chiral negative poisson's ratio support 2 is fitted into the tread 1 through the triangular central rigid body at the top, and the tread 1 and the triangular chiral negative poisson's ratio support 2 are bonded and reinforced with a polyurethane adhesive. The rim 3 is made of aluminum alloy materials, and structures such as positioning holes or grooves can be arranged on the outer side of the rim and used for mounting the triangular chiral negative poisson ratio support body. The triangular chiral negative Poisson ratio support body 2 is connected with the rim 3 by embedding the flexible beam into the positioning hole or the groove, and is further reinforced by polyurethane adhesive. When the triangular chiral negative poisson ratio support body 2 is installed, the flexible beam which can be pulled up is connected with the triangular central rigid body, namely, the whole structure forms a ring-shaped arrangement. In this embodiment, in the triangular chiral negative poisson's ratio support body 2, the bottom sides of the triangular central rigid bodies in the same layer are located on a circular ring with the same diameter, so as to form a ring structure in all three ways, which can play a role in strengthening to ensure the stability of the support body and the integrity of the whole structure.
When the triangular chiral negative poisson ratio support body 2 is vertically loaded, the triangular central rigid body rotates anticlockwise under the action of the transverse tangential beam, and then the longitudinal tangential beam is driven to contract, so that the negative poisson ratio effect is realized. Compared with an inwards concave structure, the chiral structure can realize larger deformation, and the ratio of the negative Poisson's ratio can be adjusted by setting the length of the tangential beam and the side length of the triangular central rigid body.
As a negative poisson ratio structure, the utility model discloses a triangle chirality negative poisson ratio supporter 2 can show the mechanical properties that improves non-pneumatic tire, and it has higher toughness, higher energy absorption and dissipation, bigger shear modulus, lower crack propagation and suitable acoustics action. The design of the triangular central rigid body and the 3 flexible beams can ensure that the flexible beams are driven by the central triangle to stretch when the chiral negative Poisson's ratio support body 2 is subjected to vertical load, thereby playing a role in replacing the inflation pressure of the traditional pneumatic tire. Compared with the traditional three-tangential-beam chiral structure, the structure has uniform deformation and higher energy absorption capacity, and the lightweight design is still kept.
In addition, according to finite element analysis, in a three-circle ring structure, when the number of the triangular central rigid bodies in the ring with the same diameter is more than or equal to 24, enough supporting bodies can be ensured to ensure that the tire is stressed uniformly in the practical process, and the deformation of the tire surface is smaller.
As shown in figure 1, the outer tread 1 is made of low rolling resistance rubber, nylon fiber materials and steel wire materials in a mixing mode, the tread has patterns for increasing friction force, the anti-skidding effect can be improved, and the vehicle is prevented from skidding.
Compared with the prior art, the utility model has the following advantage:
the utility model discloses a chirality negative poisson ratio supporter replaces inflation pressure, plays and bears, absorbing effect, has guaranteed the ride comfort of vehicle.
The support body has uniform shrinkage behavior, so that the deformation of the support body is more stable; and the shear modulus is larger, so that the lateral rigidity is good, and the driving comfort is ensured.
The great shortcoming of noise when current non-pneumatic tire is difficult to avoid the durability poor and go at a high speed mostly, moreover the utility model discloses a chirality burden poisson has lower crack propagation and outstanding sound absorption noise reduction performance than bearing structure to make the utility life of tire longer, the noise is littleer.
Compare in the non-pneumatic tire of negative poisson's ratio that other structures are complicated, the utility model discloses when having guaranteed the excellent performance, the structure is simpler, the manufacturing of being convenient for.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A non-pneumatic tire based on a triangular chiral negative Poisson ratio structure is characterized by comprising an outer tire surface (1), a triangular chiral negative Poisson ratio support body (2) and a rim (3); the triangular chiral negative Poisson ratio support body (2) is arranged on the outer side of the rim (3), and the tread (1) is arranged on the outer side of the angular chiral negative Poisson ratio support body (2);
the triangular chiral negative Poisson ratio support body (2) comprises a triangular central rigid body and 3 tangent flexible beams, wherein the side length of the triangular central rigid body islOf equilateral triangle structure, the length of the flexible beam beingl2; translating the triangle central rigid body to the right upper side along the straight line of the left side of the trianglelA new triangle center rigid body is obtained by the distance of 2; then the new triangle center rigid body is translated to the left upper side along the right straight linelA third triangle center rigid body is obtained by a distance of 2; the passing length between each side of each triangular central rigid body on the same straight line islThe flexible beams are connected, and new triangular central rigid bodies are continuously formed in sequence according to the rule; and finally, respectively taking a midpoint connecting line of flexible beams at the bottom edges of the triangular central rigid bodies positioned on the same side as a central axis, and respectively carrying out mirror image structures towards the left side and the right side so as to form a complete structure of the triangular chiral negative Poisson's ratio support.
2. The non-pneumatic tire based on the triangular chiral negative poisson's ratio structure according to claim 1, characterized in that the triangular chiral negative poisson's ratio support (2) is embedded into the tread (1) through the top triangular central rigid body and is adhesively reinforced with an adhesive; the rim (3) is provided with a positioning hole or a groove, and the triangular chiral negative Poisson ratio support body (2) is embedded into the positioning hole or the groove through a flexible beam which is connected with the side of a triangular central rigid body at the bottom downwards to be connected with the rim (3) and is bonded and reinforced by an adhesive.
3. The non-pneumatic tire based on the triangular chiral negative Poisson ratio structure as claimed in claim 2, wherein in the triangular chiral negative Poisson ratio support body (2) arranged around the rim (3), the base sides of the triangular central rigid bodies in the same layer are positioned on a circular ring with the same diameter, and form a three-ring circular ring structure, and the number of the triangular central rigid bodies in the circular ring with the same diameter is more than or equal to 24.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220929342.1U CN217170382U (en) | 2022-04-21 | 2022-04-21 | Non-pneumatic tire based on triangular chiral negative Poisson's ratio structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220929342.1U CN217170382U (en) | 2022-04-21 | 2022-04-21 | Non-pneumatic tire based on triangular chiral negative Poisson's ratio structure |
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| Publication Number | Publication Date |
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| CN217170382U true CN217170382U (en) | 2022-08-12 |
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| CN202220929342.1U Active CN217170382U (en) | 2022-04-21 | 2022-04-21 | Non-pneumatic tire based on triangular chiral negative Poisson's ratio structure |
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| CN (1) | CN217170382U (en) |
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- 2022-04-21 CN CN202220929342.1U patent/CN217170382U/en active Active
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