Non-pneumatic tire based on three-dimensional chiral structure and manufacturing method thereof

Abstract

The invention discloses a non-pneumatic tire based on a three-dimensional chiral structure and a manufacturing method of the non-pneumatic tire. The non-pneumatic tire comprises a tire crown, a buffer layer, a three-dimensional chiral structure supporting layer, a rim and a rim cover. The inner surface of the tire crown is fixedly connected with the outer surface of the buffer layer, the inner surface of the buffer layer is fixedly connected with the outer surface of the three-dimensional chiral structure supporting layer, a groove is formed in the inner surface of the three-dimensional chiral structure supporting layer, and a boss matched with the groove in the inner surface of the three-dimensional chiral structure supporting layer is arranged on the outer surface of the rim. A groove in the inner surface of the three-dimensional chiral structure supporting layer is connected with a boss on the outer surface of the rim in a matched mode. Through the structural design of the supporting layer and the arrangement of the buffer layer, the bearing capacity and the buffer damping performance of the non-pneumatic tire are improved; the three-dimensional chiral structure supporting layer and the rim can be detached, so that the tire is convenient to replace, and the rim can be reused.

Description

Technical Field

[0001] The present invention relates to the technical field of tires, and in particular to a non-pneumatic tire based on a three-dimensional chiral structure. Background Art

[0002] Traditional pneumatic tires have occupied the tire market for more than a hundred years with their advantages such as good shock absorption performance and low production cost. However, traditional pneumatic tires also have some disadvantages: easy wear, large rolling resistance, sometimes leakage, blowout and other hazards affect driving safety. In order to improve the shortcomings of existing pneumatic tires, non-pneumatic tires have gradually come into people's view and have been widely studied by major car companies. Non-pneumatic tires are new types of tires developed using new materials, new technologies and new processes. Compared with traditional pneumatic tires, non-pneumatic tires have good mechanical properties, good wear resistance, anti-puncture, anti-blowout, good safety, excellent buffering and shock absorption performance and other advantages.

[0003] At present, the support structure of most non-pneumatic tires is obtained based on two-dimensional plane stretching. The disadvantage of this is that if a single spoke is damaged, the lateral and vertical load-bearing capacity of the support will be greatly reduced. Summary of the invention

[0004] The purpose of the present invention is to provide a pigeon blood sampling and injection fixing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a non-pneumatic tire based on a three-dimensional chiral structure, the non-pneumatic tire comprising a tread, a buffer layer, a three-dimensional chiral structure support layer, a rim, and a rim cover; the inner surface of the tread is fixedly connected to the outer surface of the buffer layer, the inner surface of the buffer layer is fixedly connected to the outer surface of the three-dimensional chiral structure support layer, the inner surface of the three-dimensional chiral structure support layer is provided with a groove, the outer surface of the rim is provided with a boss matching the groove on the inner surface of the three-dimensional chiral structure support layer, and the groove on the inner surface of the three-dimensional chiral structure support layer is matched with the boss on the outer surface of the rim.

[0006] Preferably, the tire crown is made of low rolling resistance rubber material, and its outer surface in contact with the ground is provided with anti-skid patterns and grooves.

[0007] Preferably, a shock-absorbing strut is provided in the buffer layer and is made of a highly elastic polyurethane material.

[0008] Preferably, the three-dimensional chiral structure support layer comprises, from outside to inside, an outer support ring, a three-dimensional chiral structure support body, and an inner support ring, and the inner surface of the three-dimensional chiral structure support layer is provided with 8 grooves along the circumferential direction.

[0009] Preferably, the three-dimensional chiral structure support body is a layered structure along the radial direction, and the three-dimensional chiral structure support body is composed of a ring-shaped support body composed of four groups of three-dimensional chiral structure support units along the axial direction.

[0010] Preferably, the three-dimensional chiral structure support unit structure is a new type of three-dimensional chiral cube structure designed through spatial combination on the basis of the two-dimensional four-ligament chiral structure. The side surface is composed of a circular beam and four flexible beams. The circular beam is tangent to the four flexible beams along the same circumferential direction, and the tangent directions of the circular beams and the flexible beams on two adjacent faces are opposite. The flexible beams in contact with two adjacent faces are connected through a support ring.

[0011] Preferably, a rim guard is provided at one end of the outer side of the rim;

[0012] The other end of the rim is provided with a rim retaining ring, and the rim retaining ring has 5 groups of screw holes evenly distributed along the circumferential direction, with 3 screw holes in each group;

[0013] The wheel rim has 8 wheel rim bosses along the circumferential direction.

[0014] Preferably, the rim cover is processed with fastening screw holes at positions corresponding to the rim, a rim guard is provided at one outer end of the rim cover, the rim guard of the rim cover and the rim guard of the rim are the same in diameter and thickness, and the rim cover is fixedly connected to the rim by bolts.

[0015] A method for manufacturing a non-pneumatic tire based on a three-dimensional chiral structure comprises the following steps:

[0016] S1. Injecting a low rolling resistance rubber material into a crown mold and performing injection molding to obtain a crown;

[0017] S2. Injecting a highly elastic polyurethane material into the mold of the buffer layer, and injection molding the buffer layer;

[0018] S3. The three-dimensional chiral structure support body is composed of an annular support body composed of four groups of radial support body units in the axial direction, and four groups of annular three-dimensional chiral support bodies are printed using a 3D printer with a negative Poisson's ratio material as a raw material. The four groups of annular three-dimensional chiral structure support bodies are fixedly connected by a support ring, and the connection is further fixed with an adhesive to form a complete three-dimensional chiral structure support body. The three-dimensional chiral structure support body is installed in a mold of the outer ring and the inner ring of the support body, and a high elastic polyurethane material is injected to form a three-dimensional chiral structure support layer;

[0019] S4. The rim and rim cover manufacturing method is the same as the rim manufacturing method of the conventional pneumatic tire;

[0020] S5. Using an adhesive to fix the inner surface of the crown and the outer surface of the buffer layer;

[0021] S6. The inner surface of the buffer layer and the outer surface of the support layer are fixedly connected with an adhesive;

[0022] S7. The groove on the inner surface of the supporting layer is connected to the boss of the rim, the rim cover is fixedly connected to the rim with bolts, the rim flange of the rim cover and the rim flange of the rim will axially fix the supporting layer;

[0023] S8. Finally, vulcanization is performed to obtain a non-pneumatic tire with a three-dimensional chiral structure.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The non-pneumatic tire with a three-dimensional chiral structure proposed in the present invention has a support unit structure that is a novel three-dimensional chiral cube structure designed through spatial combination on the basis of a two-dimensional four-ligament chiral structure. Even if a single cell is damaged, the overall structure can maintain a certain load-bearing capacity in the lateral or vertical direction, thereby improving the reliability of the non-pneumatic tire.

[0026] 2. The structure has a negative Poisson's ratio in terms of mechanical properties, that is, when subjected to vertical loads, the support structure will shrink inwards, and no matter how much vertical load the structure is subjected to, the negative Poisson's ratio characteristic always exists, greatly improving the tire's load-bearing and cushioning performance. In addition, the support layer and the rim are installed in conjunction with grooves and bosses, and can be disassembled, making it easy to replace tires, so that the rim can be reused, which is in line with the principles of energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an exploded view of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a front view of the three-dimensional structure of the present invention;

[0029] Figure 3 is a cross-sectional view of the buffer layer of the present invention;

[0030] Figure 4 A diagram showing the composition process of the support layer of the present invention;

[0031] Figure 5 It is a schematic diagram of a rim of the present invention;

[0032] Figure 6 It is a schematic diagram of a rim cover of the present invention.

[0033] In the figure: 1, crown; 2, buffer layer; 3, three-dimensional chiral structure support layer; 4, rim; 5, rim cover; 2-1, buffer shock-absorbing pillar; 3-1, support body outer ring; 3-2, support body; 3-3, support inner ring; 3-2a, radial support body unit group; 3-2b, annular three-dimensional chiral structure support body; 3-2c, cylindrical beam; 3-2d, ligament beam; 3-2e, support ring; 3-3a, support inner ring groove; 4-1, rim guard; 4-2, rim boss; 4-3, rim guard ring; 5-1, rim guard. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 6 The present invention provides a technical solution: a non-pneumatic tire based on a three-dimensional chiral structure, the non-pneumatic tire comprising a crown 1, a buffer layer 2, a three-dimensional chiral structure support layer 3, a rim 4, and a rim cover 5; the inner surface of the crown 1 is fixedly connected to the outer surface of the buffer layer 2, the inner surface of the buffer layer 2 is fixedly connected to the outer surface of the three-dimensional chiral structure support layer 3, the inner surface of the three-dimensional chiral structure support layer 3 is provided with a groove 3-3a, the outer surface of the rim 4 is provided with a boss 4-2 matching the groove on the inner surface of the three-dimensional chiral structure support layer 3, the groove 3-3a on the inner surface of the three-dimensional chiral structure support layer 3 is matched with the boss 4-2 on the outer surface of the rim.

[0036] In this embodiment, the crown 1 is made of low rolling resistance rubber material, which can reduce the fuel consumption of the car and improve the wear resistance of the tire, and is environmentally friendly; its outer surface in contact with the ground is provided with anti-slip patterns and grooves, which greatly improves the friction of the tire and can reduce the tire slipping phenomenon.

[0037] In this embodiment, the buffer layer 2 is provided with a buffer shock-absorbing pillar 2-1, which can share the load borne by the three-dimensional chiral structure support layer 3 and improve the buffer shock-absorbing capacity of the non-pneumatic tire; the buffer shock-absorbing pillar 2-1 is provided with rounded corners at both ends, which can effectively avoid stress concentration and enhance the durability of the buffer layer 2; the buffer layer is made of high-elastic polyurethane material.

[0038] In this embodiment, the three-dimensional chiral structure support layer 3 includes, from the outside to the inside, a support body outer ring 3-1, a three-dimensional chiral structure support body 3-2, and a support body inner ring 3-3. The three-dimensional chiral structure support body 3-2 is made of negative Poisson's ratio material by 3D printing, and the support body inner ring 3-3 and the support body outer ring 3-1 are injection molded with high-elastic polyurethane material. The inner surface of the three-dimensional chiral structure support layer 3 is provided with 8 support body inner ring grooves 3-3a along the circumferential direction.

[0039] In this embodiment, the three-dimensional chiral structure support 3-2 is a layered structure along the radial direction, and the three-dimensional chiral structure support 3-2 is composed of a ring-shaped three-dimensional chiral structure support 3-2b composed of four groups of radial support units 3-2a along the axial direction.

[0040] In this embodiment, the three-dimensional chiral structure support unit structure is a new type of three-dimensional chiral cube structure designed through spatial combination on the basis of the two-dimensional four-ligament chiral structure, one of which is composed of a cylindrical beam 3-2c and four flexible ligament beams 3-2d, and the cylindrical beam 3-2c is tangent to the four flexible ligament beams 3-2d along the same circumferential direction, and the flexible ligament beams 3-2d that are in contact with two adjacent faces are connected by a support ring 3-2e.

[0041] In this embodiment, a rim guard 4-1 is provided at one end of the outer side of the rim 4 to prevent the three-dimensional chiral structure support layer 3 from moving axially, and a rim guard ring 4-3 is provided at the other end of the rim 4. The rim guard ring 4-3 has 5 groups of screw holes evenly distributed along the circumferential direction, with 3 holes in each group. The outer surface of the rim 4 has 8 rim bosses 4-2 along the circumferential direction to cooperate with the inner ring groove 3-3a of the three-dimensional chiral structure support layer support body for installation.

[0042] In this embodiment, fastening screw holes are processed at positions corresponding to the rim cover 5 and the rim 4, and a rim guard 5-1 is provided at one end of the outer side of the rim cover 5. The rim guard 5-1 of the rim cover 5 and the rim guard 4-1 of the rim 4 have the same diameter and thickness. The rim cover 5 and the rim 4 are fixedly connected by bolts, and the rim guards of the two are used to axially fix the three-dimensional chiral structure support layer 3 to limit the movement of the support layer 3 along the axial direction; the three-dimensional chiral structure support layer 3 is installed by matching the inner ring groove 3-3a of the support body and the rim boss 4-2, and can be disassembled for convenient tire replacement, so that the rim 4 can be reused, which meets the principles of energy saving and environmental protection.

[0043] A method for manufacturing a non-pneumatic tire based on a three-dimensional chiral structure comprises the following steps:

[0044] S1. Injecting a low rolling resistance rubber material into a crown mold and performing injection molding to obtain a crown;

[0045] S2. Injecting a highly elastic polyurethane material into the mold of the buffer layer, and injection molding the buffer layer;

[0046] S3. The three-dimensional chiral structure support body is composed of an annular support body composed of four groups of radial support body units in the axial direction, and four groups of annular three-dimensional chiral support bodies are printed using a 3D printer with a negative Poisson's ratio material as a raw material. The four groups of annular three-dimensional chiral structure support bodies are fixedly connected by a support ring, and the connection is further fixed with an adhesive to form a complete three-dimensional chiral structure support body. The three-dimensional chiral structure support body is installed in a mold of the outer ring and the inner ring of the support body, and a high elastic polyurethane material is injected to form a three-dimensional chiral structure support layer;

[0047] S4. The rim and rim cover manufacturing method is the same as the rim manufacturing method of the conventional pneumatic tire;

[0048] S5. Using an adhesive to fix the inner surface of the crown and the outer surface of the buffer layer;

[0049] S6. The inner surface of the buffer layer and the outer surface of the support layer are fixedly connected with an adhesive;

[0050] S7. The groove on the inner surface of the supporting layer is connected to the boss of the rim, the rim cover is fixedly connected to the rim with bolts, the rim flange of the rim cover and the rim flange of the rim will axially fix the supporting layer;

[0051] S8. Finally, vulcanization is performed to obtain a non-pneumatic tire with a three-dimensional chiral structure.

[0052] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A non-pneumatic tire based on a three-dimensional chiral structure, characterized in that: The non-pneumatic tire comprises a tread (1), a buffer layer (2), a three-dimensional chiral structure support layer (3), a rim (4), and a rim cover (5); The inner surface of the tread crown (1) is fixedly connected to the outer surface of the buffer layer (2), the inner surface of the buffer layer (2) is fixedly connected to the outer surface of the three-dimensional chiral structure support layer (3), the inner surface of the three-dimensional chiral structure support layer (3) is provided with a groove (3-3a), the outer surface of the rim (4) is provided with a boss (4-2) matching the inner surface groove (3-3a) of the three-dimensional chiral structure support layer (3), and the inner surface groove (3-3a) of the three-dimensional chiral structure support layer (3) is matched with the outer surface boss (4-2) of the rim (4).

2. A non-pneumatic tire based on a three-dimensional chiral structure according to claim 1, characterized in that: The tire crown (1) is made of low rolling resistance rubber material, and its outer surface in contact with the ground is provided with anti-skid patterns and grooves.

3. A non-pneumatic tire based on a three-dimensional chiral structure according to claim 2, characterized in that: The buffer layer (2) is provided with a shock-absorbing pillar (2-1) made of a high-elasticity polyurethane material.

4. The non-pneumatic tire based on a three-dimensional chiral structure according to claim 1, characterized in that: The three-dimensional chiral structure support layer (3) comprises, from the outside to the inside, a support outer ring (3-1), a three-dimensional chiral structure support body (3-2), and a support inner ring (3-3), and the inner surface of the three-dimensional chiral structure support layer (3) is provided with 8 grooves (3-3a) along the circumferential direction.

5. The non-pneumatic tire based on a three-dimensional chiral structure according to claim 1, characterized in that: The three-dimensional chiral structure support (3-2) is a layered structure along the radial direction, and the three-dimensional chiral structure support (3-2) is composed of a ring-shaped three-dimensional chiral structure support (3-2b) composed of four groups of radial support unit groups (3-2a) along the axial direction.

6. The non-pneumatic tire based on a three-dimensional chiral structure according to claim 1, characterized in that: The unit structure of the three-dimensional chiral structure support body (3-2) is a three-dimensional chiral cube structure designed by spatial combination on the basis of a two-dimensional four-ligament chiral structure. The side surface is composed of a circular beam (3-2c) and four flexible beams (3-2d). The circular beam (3-2c) is tangent to the four flexible beams (3-2d) along the same circumferential direction, and the circular beams (3-2c) and flexible beams (3-2d) of two adjacent faces are tangent in opposite directions. The flexible beams (3-2d) that are in contact with two adjacent faces are connected via a support ring (3-2e).

7. The non-pneumatic tire based on a three-dimensional chiral structure according to claim 1, characterized in that: A rim guard (4-1) is provided at one end of the outer side of the rim (4); A rim retaining ring (4-3) is arranged at the other end of the rim (4), and the rim retaining ring (4-3) has five groups of screw holes evenly distributed along the circumferential direction, with three screw holes in each group; The wheel rim (4) has eight wheel rim bosses (4-2) along the circumferential direction.

8. The non-pneumatic tire based on a three-dimensional chiral structure according to claim 1, characterized in that: The rim cover (5) is provided with fastening screw holes at positions corresponding to the rim (4); a rim flange (5-1) is provided at one end of the outer side of the rim cover (5); the rim flange (5-1) of the rim cover (5) and the rim flange (4-1) of the rim (4) have the same diameter and thickness; the rim cover (5) and the rim (4) are fixedly connected by bolts.

9. A method for manufacturing a non-pneumatic tire having a three-dimensional chiral structure according to claims 1 to 8, characterized in that: The following steps are involved: S1. Injecting a low rolling resistance rubber material into the crown (1) mold by injection molding to obtain a crown (1); S2. Injecting a highly elastic polyurethane material into the mold of the buffer layer (2), and injecting the buffer layer (2) by injection molding; S3. The three-dimensional chiral structure support body (3-2) is composed of an annular three-dimensional chiral structure support body (3-2b) composed of four groups of radial support body unit groups (3-2a) along the axial direction. The four groups of annular three-dimensional chiral structure support bodies (3-2b) are printed using a 3D printer with a negative Poisson's ratio material as a raw material. The four groups of annular three-dimensional chiral structure support bodies (3-2b) are fixedly connected by a support ring (3-2e), and the connection is further fixed with an adhesive to form a complete three-dimensional chiral structure support body (3-2). The three-dimensional chiral structure support body (3-2) is installed in the mold of the outer ring (3-1) and the inner ring (3-3) of the support body, and a high elastic polyurethane material is injected to form a three-dimensional chiral structure support layer (3); S4. The rim (4) and the rim cover (5) are manufactured in the same manner as the rim manufacturing method of a conventional pneumatic tire; S5. The inner surface of the crown (1) and the outer surface of the buffer layer (2) are fixedly connected with an adhesive; S6. Using an adhesive to fix the inner surface of the buffer layer (2) and the outer surface of the support layer (3); S7. The groove (3-3a) on the inner surface of the support layer (3) is connected to the boss (4-2) of the rim (4), and the rim cover (5) is fixedly connected to the rim (4) by bolts, and the rim flange (5-1) of the rim cover (5) and the rim flange (4-1) of the rim (4) axially fix the support layer (3); S8. Finally, vulcanization is performed to obtain a non-pneumatic tire with a three-dimensional chiral structure.

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