CN219191835U - Flame-retardant inner support body of safety tire - Google Patents
Flame-retardant inner support body of safety tire Download PDFInfo
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- CN219191835U CN219191835U CN202223200051.8U CN202223200051U CN219191835U CN 219191835 U CN219191835 U CN 219191835U CN 202223200051 U CN202223200051 U CN 202223200051U CN 219191835 U CN219191835 U CN 219191835U
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- outer ring
- proof layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The utility model discloses a flame-retardant inner support body of a safety tire, which is arranged on a rim and positioned in the tire, wherein the inner support body is of an annular structure formed by combining at least two support units with the same structure, the radial cross section of each support unit is I-shaped, the support unit comprises a rigid body and an explosion-proof layer, the rest surface of the rigid body except the surface contacted with the rim is covered with the explosion-proof layer, the rigid body is made of fiber reinforced composite materials, and the explosion-proof layer is made of elastic materials for preventing explosion impact. Through the abrasion of the tire, the condition that the supporting body or the tire burns after the tire is shot by a bullet or the bomb is exploded can be prevented, and the tire can reach the normal run-flat mileage.
Description
Technical Field
The utility model belongs to the technical field of safety tires, and particularly relates to a flame-retardant inner support body of a safety tire.
Background
The existing inner support body of the safety tire mainly has two structures: one is an inner support body which is directly arranged as a whole; another is a bulletproof tire, such as one disclosed in chinese patent CN106945472, in which an elastic buffer layer is wrapped outside the support body, and the elastic buffer layer is made of soft bulletproof material. The support body is made of two component materials, namely nylon, polyurethane, aluminum alloy, rubber and other single materials, wherein the rubber is of a one-piece structure, and the aluminum alloy is of the other one.
The support body made of rubber has been eliminated due to low strength, heavy weight, difficult assembly and easy combustion. The inner support body made of aluminum alloy has high rigidity and strong bearing capacity, but has no buffer performance, and has high compression stress and shearing stress on the tyre crown rubber, and the tyre crown rubber, especially the inner liner rubber, is quickly thermally degraded after being greatly compressed and sheared, is separated from the steel wire, the exposed steel wire rubs with the aluminum alloy support body and is heated to redness reaching more than 500 ℃, and the instantaneous high temperature leads to the combustion of the inner liner rubber and the steel wire rubber coating. After the connecting part between the hollows of the aluminum alloy inner support body is hit by a plurality of bullets, cracks are expanded and broken, and the disassembly risk is extremely high. The thermal deformation temperature of the support body made of thermoplastic materials such as nylon support body and polyurethane is lower than 120 ℃, the cushioning performance is better than that of an aluminum alloy support body, the compression and shearing stress of the tire crown rubber and the tire inner rubber is lower than that of the aluminum alloy support body, irregular through ablation holes can be formed at the positions hit by bullets, when the tire runs flat, the thermal coupling phenomenon occurs at the positions hit by bullets, deformation is increased, the temperature is increased, the bearing capacity is rapidly reduced after the temperature reaches 180 ℃, and the combustion failure begins after the temperature in the tire is increased to more than 240 ℃.
With the improvement of requirements, the requirements of the run-flat mileage of the tire are increased from 30-50 km to 100 km or even 150 km, wherein the on-road running speed is 25-90 km/h, and the off-road running speed is 30 km/h, but the existing supporting body can not inhibit the combustion in the tire or can also burn by itself, and the run-flat mileage of the tire can generally be maintained at only 30-50 km and can not well meet the requirements.
Disclosure of Invention
The utility model aims to provide a flame-retardant inner support body of a safety tire, which can prevent the condition that the support body or the tire burns after the tire is shot by bullets.
The technical scheme adopted by the utility model is as follows: the utility model provides a support body in flame retardant of run-flat tire, interior support body installs on the rim, and is located the tire, interior support body sets up to form annular structure by the combination of at least two support units that the structure is the same, and every support unit radial cross-section is "worker" style of calligraphy, the support unit includes rigid body and explosion-proof layer, the rigid body is external except the face that contacts with the rim all to be covered with the explosion-proof layer, the material of rigid body is fiber reinforced composite, the material of explosion-proof layer is the elastic material that has the explosion-proof impact.
Preferably, the rigid body comprises an intermediate layer and a shell arranged around the intermediate layer, wherein the shell is at least provided with two layers, at least two different materials are arranged on the shell, and the fibers on the intermediate layer are spirally, annularly or nondirectionally distributed.
Further preferably, the rigid body comprises an outer ring arranged far away from the rim and an inner ring arranged close to the rim, the outer ring is connected with the inner ring through a radially arranged middle rib plate, the axial dimension of the outer ring is smaller than that of the inner ring, the axial dimension of the middle rib plate is smaller than that of the outer ring, and the thickness of an explosion-proof layer covered on the rest surface of the outer ring except for the rest surface of the inner ring, which is close to one side of the rim, and the rest surface of the inner ring except for one side of the rim is not larger than that of the explosion-proof layer covered outside the middle rib plate.
Further preferably, the axial dimension of the outer ring is not less than 40mm, the axial dimension of the inner ring is not less than 50mm, and the axial dimension of the intermediate rib is between 15 and 50 mm.
Further preferably, the radial thickness of the outer ring is not smaller than the radial thickness of the inner ring, the radial thickness of the outer ring is between 15 and 30mm, and the radial thickness of the inner ring is between 5 and 15 mm.
Further preferably, a plurality of axial through holes are uniformly formed in the circumferential direction on the middle rib plate, the inner diameter of each axial through hole is between 10mm and 40mm, and the interval between two adjacent axial through holes is not smaller than 20mm.
Further preferably, the explosion-proof layer thickness of the outer ring, which is covered on the rest surface of the outer ring, which is close to the rim, and the rest surface of the inner ring, which is far away from the rim, is between 0.25 and 10mm, and the explosion-proof layer thickness of the outer ring, which is covered on the surface of the outer ring, which is close to the rim, and the rest surface of the inner ring, which is far away from the rim, is between 0.25 and 20mm.
Further preferably, the explosion-proof layer is made of polyurea with tensile strength of 4-24MPa, elongation of 150% -500% and thermal deformation temperature of not less than 120 ℃.
Further preferably, the rigid body is made of fiber reinforced composite material with flame retardant, and the wear resistance of the explosion-proof layer is lower than that of the tire rubber.
The utility model has the beneficial effects that:
1) The supporting unit is composed of a rigid body and an explosion-proof layer, the modulus of the rigid body is lower than that of the aluminum alloy supporting body, so that the buffering performance of the supporting unit is superior to that of the aluminum alloy supporting body, and the modulus of the explosion-proof layer is not higher than that of rubber and steel wire rubber coating in a tire, so that the explosion-proof layer cannot abrade the rubber and the steel wire rubber coating in the tire when contacting the rubber and the steel wire rubber coating in the tire during tire deflation;
2) The rigid body adopts a fiber reinforced composite material, and the fiber belongs to a non-combustible material, so that ablation holes cannot be formed after being hit by bullets, and the structural stability of the fiber reinforced composite material is superior to that of nylon or polyurethane materials, so that the rigid body has a supporting function when being broken down;
3) The anti-explosion layer is covered outside the rigid body and used for buffering explosion energy, and the special arrangement of fibers in the rigid body ensures that the bearing area and the buffer area are alternately arranged, so that the bearing area and the buffer area can absorb impact and can prevent the impact from advancing, the anti-bullet and anti-lightning effects are achieved, the protection capability is excellent, the aluminum alloy inner support body, the nylon or the polyurethane support body have no protection capability, and the number of layers and each layer of materials of the rigid body shell can be specifically arranged according to the service condition of the safety tire, so that the protection capability is increased or reduced according to the requirement;
4) When the safety tire is deflated, the explosion-proof layer is firstly contacted with the tire and then is worn out to leak out of the rigid body, and the powder of the fiber reinforced composite material is continuously released along with the abrasion in the outer ring of the rigid body, so that the aim of inhibiting the combustion of rubber in the tire is fulfilled;
5) Because the rigid body of the inner support body is wrapped by the explosion-proof layer, the impact of damp-heat aging is small in the daily use process, the strength is reduced very slowly, the service life is long, and the strength is reduced after being hit by a bullet.
Drawings
Fig. 1 is a schematic view of the installation of the present utility model.
Fig. 2 is a schematic view of a radial cross section of the present utility model.
Fig. 3 is a schematic dimensional view of the present utility model.
Fig. 4 is a side view of the present utility model.
Fig. 5 is a schematic structural view of the housing according to the present utility model.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1-5, an inner flame-retardant support body of a safety tire is arranged on a rim and is positioned in the tire, the support body is arranged to be formed into an annular structure by combining at least two support units with the same structure, and the radial cross section of each support unit is in an I shape, which is the prior art and is not repeated here.
Each supporting unit is composed of a rigid body 1 and an explosion-proof layer 2, wherein the radial section of the rigid body 1 is in an I shape, the explosion-proof layer 2 is covered on the rest surface except the surface which is contacted with the rim of the rigid body 1, the material of the rigid body 1 is fiber reinforced composite material, and the material of the explosion-proof layer 2 is polymer elastic material for preventing explosion impact.
The rigid body 1 is arranged into a middle layer 1a and a shell 1b from inside to outside, the shell 1b is arranged around the middle layer 1a, at least two layers of materials are arranged on the shell 1b, at least two different materials are arranged on the shell 1b, at least two layers of fibers are different in arrangement mode, the fibers on each layer can be distributed in a directional mode or in an undirected mode, preferably, the structure on the shell is a sandwich structure, namely, two adjacent layers of structures are different, one layer is provided with a buffer material, the other layer is provided with a bearing material, as shown in fig. 5, four layers of materials are different in adjacent layers. The fibres on the intermediate layer 1a are arranged in a spiral, annular or undirected distribution, as shown in fig. 2, the intermediate layer being arranged in an annular distribution at the part remote from the rim and near the rim, the remainder being undirected.
The rigid body 1 is radially arranged from far to near into an outer ring 1c, an inner ring 1d and an intermediate rib plate 1e, namely, the outer ring 1c is arranged far away from the rim, the inner ring 1d is arranged close to the rim, the outer ring 1c and the inner ring 1d are connected through the radially arranged intermediate rib plate 1e, the axial dimension Z1 of the outer ring 1c is smaller than the axial dimension Z2 of the inner ring 1d, and the axial dimension Z3 of the intermediate rib plate 1e is smaller than the axial dimension Z1 of the outer ring 1 c. Specifically, the axial dimension Z1 of the outer ring 1c is not less than 40mm, the axial dimension Z2 of the inner ring 1d is not less than 50mm, and the axial dimension Z3 of the intermediate rib 1e is between 15 and 50 mm.
The inner support body enables the rigid body to release the flame retardant material through wearing the rigid body, so that a protection effect is realized, and the radial thickness J1 of the outer ring 1c is not smaller than the radial thickness J2 of the inner ring in order to ensure that the wearing time of the rigid body is prolonged. Specifically, the radial thickness J1 of the outer ring 1c is between 15 and 30mm, and the radial thickness J2 of the inner ring 1d is between 5 and 15 mm.
In order to prevent the bullet from being directly injected from the side surface to damage the tire, the thickness H1 of the explosion-proof layer 2 covered by the outer ring 1c except the rest surface near the rim and the rest surface of the inner ring 1d except the rest surface far away from the rim is not greater than the thickness H2 of the explosion-proof layer 2 covered by the middle rib plate 1 e. Specifically, the thickness H1 of the explosion-proof layer 2 covered on the remaining surface of the outer ring 1c, which is close to the rim, and the remaining surface of the inner ring 1d, which is far from the rim, is between 0.25 and 10mm, and the thickness H2 of the explosion-proof layer 2 covered on the surface of the outer ring 1c, which is close to the rim, and the surface of the inner ring 1d, which is far from the rim, is between 0.25 and 20mm, except for the intermediate rib 1 e.
A plurality of axial through holes 1f are uniformly arranged on the middle rib plate 1e in the circumferential direction, the inner diameter of each axial through hole 1f is between 10 and 40mm, and the interval between two adjacent axial through holes 1f is not less than 20mm.
Specifically, the explosion-proof layer 2 can be polyurea with tensile strength of 4-24MPa, elongation of 150% -500% and thermal deformation temperature of not less than 120 ℃.
For increasing the flame retardant property of the rigid body, a fiber reinforced composite material with a flame retardant can be adopted for the rigid body 1, and specifically, the fiber reinforced composite material comprises components such as resin, fiber, filler, curing agent, flame retardant and the like. Meanwhile, the wear resistance of the explosion-proof layer can be set to be lower than that of the tire rubber, so that the explosion-proof layer can be quickly worn by the rubber during run-flat running, and the contact wear of the rigid body and the tire is facilitated, and the flame retardant component is released.
The supporting unit can be arranged in other shapes, or the supporting body can be of other structures, so long as the supporting unit is arranged on the rim and positioned in the tire, and the supporting structure for supporting the tread can be of a double-layer structure of the supporting unit in the application when the tire is deflated or burst.
The results of the real elastic breakdown test and the bench test of the internal support body made of the data and the materials are as follows: the inner support body is at the distance of 100m, and the middle rib plate is continuously shot by 2 bullets of 7.62mm, one bullet is blocked, the other bullet penetrates, and the run-flat mileage of the automobile can meet the requirement during load test. When shooting at a distance of 100m, the transverse penetrating protection capability of the inner ring and the outer ring to bullets with diameters of 7.62mm or 5.8mm reaches 100%, the middle rib plates are allowed to be broken down by the bullets, but tearing holes and penetrating holes are not formed, the explosion-proof layer can buffer the impact of the bullets or mines, and the internal support body is high in structural stability.
Claims (9)
1. The utility model provides a support body in flame retardant of run-flat tire, interior support body installs on the rim, and is located the tire, interior support body sets up to form annular structure by the combination of at least two support units that the structure is the same, and every support unit radial cross-section is "worker" style of calligraphy, its characterized in that: the support unit comprises a rigid body (1) and an explosion-proof layer (2), wherein the explosion-proof layer (2) is covered on the rest surface of the rigid body (1) except the surface contacted with the rim, the rigid body (1) is made of fiber reinforced composite materials, and the explosion-proof layer (2) is made of polymer elastic materials for preventing explosion impact.
2. The flame retardant inner support for a run flat tire as set forth in claim 1, wherein: the rigid body (1) comprises an intermediate layer (1 a) and a shell (1 b) arranged around the intermediate layer (1 a), wherein the shell (1 b) is at least provided with two layers, at least two different materials are arranged on the shell (1 b), and fibers on the intermediate layer (1 a) are spirally, annularly or undirected.
3. The flame retardant inner support for a run flat tire as set forth in claim 1, wherein: the rigid body (1) comprises an outer ring (1 c) arranged far away from a rim and an inner ring (1 d) arranged close to the rim, wherein the outer ring (1 c) is connected with the inner ring (1 d) through a radially arranged middle rib plate (1 e), the axial size of the outer ring (1 c) is smaller than that of the inner ring (1 d), the axial size of the middle rib plate (1 e) is smaller than that of the outer ring (1 c), the outer ring (1 c) is not larger than that of the explosion-proof layer (2) covered on the rest surface, except for the rest surface, close to the rim, of the inner ring (1 d), except for the rest surface, of the inner ring (1 d).
4. A flame retardant inner support for a run flat tire as in claim 3, wherein: the axial dimension of the outer ring (1 c) is not smaller than 40mm, the axial dimension of the inner ring (1 d) is not smaller than 50mm, and the axial dimension of the middle rib plate (1 e) is between 15 and 50 mm.
5. A flame retardant inner support for a run flat tire as in claim 3, wherein: the radial thickness of the outer ring (1 c) is not smaller than that of the inner ring, the radial thickness of the outer ring (1 c) is between 15 and 30mm, and the radial thickness of the inner ring (1 d) is between 5 and 15 mm.
6. A flame retardant inner support for a run flat tire as in claim 3, wherein: the middle rib plate (1 e) is circumferentially and uniformly provided with a plurality of axial through holes (1 f), the inner diameter of each axial through hole (1 f) is between 10 and 40mm, and the interval between two adjacent axial through holes (1 f) is not less than 20mm.
7. A flame retardant inner support for a run flat tire as in claim 3, wherein: the thickness of the explosion-proof layer (2) covered on the rest surface of the outer ring (1 c) close to the rim and the rest surface of the inner ring (1 d) far away from the rim is between 0.25 and 10mm, and the thickness of the explosion-proof layer (2) covered on the surface of the outer ring (1 c) close to the rim and the rest surface of the inner ring (1 d) far away from the rim is between 0.25 and 20mm except the middle rib plate (1 e).
8. The flame retardant inner support for a run flat tire as set forth in claim 1, wherein: the explosion-proof layer (2) adopts polyurea with tensile strength of 4-24MPa, elongation of 150-500% and thermal deformation temperature of not less than 120 ℃.
9. The flame retardant inner support for a run flat tire as set forth in claim 1, wherein: the rigid body (1) is made of fiber reinforced composite material with flame retardant, and the wear resistance of the explosion-proof layer (2) is lower than that of tire rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223200051.8U CN219191835U (en) | 2022-11-30 | 2022-11-30 | Flame-retardant inner support body of safety tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223200051.8U CN219191835U (en) | 2022-11-30 | 2022-11-30 | Flame-retardant inner support body of safety tire |
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| Publication Number | Publication Date |
|---|---|
| CN219191835U true CN219191835U (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223200051.8U Active CN219191835U (en) | 2022-11-30 | 2022-11-30 | Flame-retardant inner support body of safety tire |
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| CN (1) | CN219191835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115848072A (en) * | 2022-12-19 | 2023-03-28 | 贵州轮胎股份有限公司 | Safety tire assembly for rail transit |
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2022
- 2022-11-30 CN CN202223200051.8U patent/CN219191835U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115848072A (en) * | 2022-12-19 | 2023-03-28 | 贵州轮胎股份有限公司 | Safety tire assembly for rail transit |
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