CN218316096U - Tire and vehicle - Google Patents
Tire and vehicle Download PDFInfo
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- CN218316096U CN218316096U CN202222253958.4U CN202222253958U CN218316096U CN 218316096 U CN218316096 U CN 218316096U CN 202222253958 U CN202222253958 U CN 202222253958U CN 218316096 U CN218316096 U CN 218316096U
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Abstract
The utility model discloses a tire and a vehicle, wherein the tire comprises a tire framework component, and the tire framework component comprises a tire side, a tire shoulder part, a tire crown part and a pair of tire bead parts for mounting a rim; a sidewall portion extending from the bead portion to an outer side in the tire radial direction; a shoulder portion extending from the sidewall portion to an outer side in the tire radial direction; a crown portion extending from the shoulder portion in a width direction of the tire; wherein the ratio of the thickness of the tire crown part to the thickness of the tire shoulder part is 0.95-1. The utility model provides a tire and a vehicle, which can make the inner contour of the tire body more reasonable by optimizing the thickness design at the position of the tire crown; the tension distribution of the tire crown part is more uniform before and after the tire is inflated, so that the expansion of the tire crown part is more uniform, and the strain energy of the tire crown part in unit volume is reduced, so that the whole strain energy of the tire crown part can be reduced, the rolling resistance of the tire is reduced, and the problem of thermal generation of endurance fatigue is solved.
Description
Technical Field
The utility model relates to a vehicle technical field especially relates to a tire and have vehicle of this tire.
Background
For lithium battery electric vehicles, endurance is a property of great concern for new energy vehicles. From the perspective of tires, the reduction of rolling resistance can improve the cruising ability of electric vehicles, which is also an important tire performance to be evaluated when new energy vehicles and tires are developed into new products.
Therefore, it is necessary to provide a tire having a low rolling resistance and a vehicle having the tire.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tire and vehicle, this tire has lower rolling resistance and good durability.
In order to achieve the above purpose, the utility model provides a technical scheme as follows:
in a first aspect, the present invention provides a tire comprising a tire frame member, the tire frame member comprising a sidewall portion, a shoulder portion, a crown portion, and a pair of bead portions for mounting a rim; a sidewall portion extending from the bead portion to an outer side in the tire radial direction; a shoulder portion extending from the side wall portion to an outer side in the tire radial direction; a crown portion extending from the shoulder portion in a width direction of the tire; wherein the ratio of the thickness of the crown part to the thickness of the shoulder part is 0.95-1.
In one or more embodiments, a ratio of the thickness of the sidewall portion to the thickness of the shoulder portion is 0.95 to 1.
In one or more embodiments, the crown portion includes a tread band and the sidewall portion includes a sidewall band, the interface of the tread band and sidewall band being located in a middle region of the shoulder portion.
In one or more embodiments, the crown portion further includes a carcass layer and an air barrier layer, the tread rubber being provided on an outer surface of the carcass layer, the air barrier layer being provided on an inner surface of the carcass layer.
In one or more embodiments, the carcass layer includes a first ply and a second ply disposed in a stack, the first ply and the second ply turn up the bead portion.
In one or more embodiments, the turnup end point differential of the first ply and the second ply is between 4 and 9mm.
In one or more embodiments, the first ply and the second ply are both nylon layers.
In one or more embodiments, the tread rubber is provided with a tread groove and a tread pattern, and the base rubber thickness of the tread groove is 1.4-1.8 mm.
In one or more embodiments, the tread groove has a depth of 2.5 to 3mm.
In a second aspect, the present invention provides a vehicle comprising a tire as described in any one of the preceding embodiments.
Compared with the prior art, the tire and the vehicle provided by the utility model have the advantages that the ratio of the thickness of the tire crown part to the thickness of the tire shoulder part is between 0.95 and 1.0 by optimizing the thickness design of the tire crown part, so that the inner contour of the tire body is more reasonable; the tension distribution of the tire crown part is more uniform before and after the tire is inflated, so that the expansion of the tire crown part is more uniform, and the strain energy of the tire crown part in unit volume is reduced, so that the whole strain energy of the tire crown part can be reduced, the rolling resistance of the tire is reduced, and the problem of thermal generation of endurance fatigue is solved.
Drawings
Fig. 1 is a cross-sectional view of a tire in an axial direction according to an embodiment of the present invention;
FIG. 2 is a partial view of FIG. 1;
fig. 3 is a schematic cross-sectional profile of a tire according to example 1 of the present invention and comparative example 1.
Description of the main reference numerals:
1-sidewall, 11-sidewall, 2-shoulder, 3-crown, 31-tread, 32-carcass, 321-first ply, 322-second ply, 33-innerliner, 4-bead, 41-cladding, 42-bead.
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings, but it should be understood that the scope of the invention is not limited by the detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations such as "comprises" or "comprising", etc., will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Referring to fig. 1 and 2, a tire according to an embodiment of the present invention can be applied to a bicycle, an electric vehicle, a scooter, and the like, and includes a tire frame member. The tire frame member includes a sidewall portion 1, a shoulder portion 2, a crown portion 3, and a pair of bead portions 4 for mounting a rim.
The sidewall portion 1 extends outward in the tire radial direction from the bead portion 4; the shoulder portion 2 extends from the sidewall portion 1 to the outer side in the tire radial direction; the crown portion 3 extends from the shoulder portions 2 in the width direction of the tire. Wherein the thickness d of the crown part 3 1 Thickness d of shoulder portion 2 2 The ratio of (A) to (B) is 0.95-1. d 1 And d 2 The ratio of (A) can be any value between 0.95 and 1, such as 0.95, 0.96, 0.98, 1, etc.
Specifically, the thickness d of the sidewall portion 1 3 Thickness d of shoulder portion 2 2 The ratio of (A) to (B) is 0.95-1. d 3 And d 2 The ratio of (b) can be any value between 0.95 and 1, such as 0.95, 0.97, 0.98, 1, etc.
In the present embodiment, the thickness d of the crown portion 3 is set to be equal to or less than the thickness d of the tire 1 Defined as the thickness of the crown portion 3 at the cross-sectional middle position in the tire axis direction; thickness d of the shoulder portion 2 2 Defined as the thickness of the shoulder portion 2 at the cross-sectional middle position in the tire axial direction; thickness d of sidewall 1 3 Defined as the thickness of the sidewall portion 1 at the middle position of the section in the tire axial direction.
In the present embodiment, the thickness d of the crown portion 3 is made by optimizing the design of the thickness at the position of the crown portion 3 1 Thickness d of shoulder portion 2 2 The ratio of (A) to (B) is between 0.95 and 1.0, so that the inner contour of the tire body is more reasonable; not only ensures that the tension distribution of the crown part 3 is more uniform before and after the tire is inflated, so that the expansion of the crown part 3 is more uniform, but also reduces the strain energy of the crown part 3 per unit volume, thereby reducing the whole strain energy of the crown part 3, reducing the rolling resistance of the tire and improving the problem of heat generation of endurance fatigueTo give a title.
In an exemplary embodiment, the crown portion 3 includes a tread rubber 31, the sidewall portion 1 includes a sidewall rubber 11, and an interface between the tread rubber 31 and the sidewall rubber 11 is located in a middle region of the shoulder portion 2. The design mainly considers that when the tire is applied to a two-wheeled vehicle, the camber thrust is required to be obtained by inclining a vehicle body to counter the centrifugal force to realize stable steering, so that the curvature radius of the tread of the tire needs to be designed to be smaller, a camber angle with a larger angle can be obtained when the tire is steered, and in order to ensure that the vehicle can still obtain better abrasion and ground holding force when the vehicle is tilted outwards, the tread rubber 31 is extended to a tire shoulder area in the embodiment.
Further, the tread rubber 31 is provided with a tread groove for drainage and a tread pattern for anti-skid. The thickness of the bottom rubber of the tread groove is preferably 1.4-1.8 mm, and the depth of the tread groove is preferably 2.5-3 mm.
In an exemplary embodiment, the crown portion 3 further includes a carcass layer 32 and an inner liner 33, the tread rubber 31 being provided on an outer surface of the carcass layer 32, and the inner liner 33 being provided on an inner surface of the carcass layer 32.
Specifically, the carcass layer 32 includes a first ply 321 and a second ply 322 disposed one on top of the other, and the first ply 321 and the second ply 322 turn up the bead portion 4. The difference in turn-up end points between the first ply 321 and the second ply 322 is preferably 4 to 9mm.
Further, the first ply 321 and the second ply 322 are both nylon layers made of nylon material. The nylon material may be nylon 6 (N6), nylon 66 (N66), nylon 46 (N46), nylon 11 (N11), nylon 12 (N12), nylon 610 (N610), nylon 612 (N612), nylon 6/66 copolymer (N6/66), nylon 6/66/610 copolymer (N6/66/610), nylon MXD6, nylon 6T, nylon 6/6T copolymer, nylon 66/PP copolymer, nylon 66/PPs copolymer, or the like.
Specifically, the bead portion 4 includes a covering layer 41 and a bead core 42 covered in the covering layer 41. The cladding 41 is preferably made of rubber material, and the ring core 42 is preferably made of a plurality of steel wires arranged and combined, and the outer surfaces of the steel wires may be coated with zinc plating, copper plating, and the like. The core 42 may be made of other metals as long as it can ensure torsional rigidity and adhesion of the bead portion 4.
The utility model discloses an embodiment still provides a vehicle, and this vehicle includes the tire in any preceding embodiment. The vehicle can be a bicycle, an electric vehicle, a scooter and other two-wheeled vehicles.
The present invention will be further described with reference to the following specific examples.
Example 1
Tyre parameters
Tire outside diameter: 10 inches;
thickness ratio of crown portion to shoulder portion: 0.97;
thickness ratio of sidewall portion to shoulder portion: 0.98 of;
material of the first ply and the second ply: nylon;
turnup end point difference of the first ply and the second ply: 6mm;
base rubber thickness of tread groove: 1.7;
depth of tread groove: 2.7mm.
Comparative example 1
Tyre parameters
Thickness ratio of crown portion to shoulder portion: 1.06;
base rubber thickness of tread groove: 2.5mm;
the remaining parameters were the same as in example 1.
The schematic cross-sectional profiles of the tires of example 1 and comparative example 1 are shown in fig. 3.
Tire rolling resistance performance test
The tires of example 1 and comparative example 1 were subjected to a rolling resistance test by a rolling resistance tester under the following test conditions: the tire pressure is 340kPa, the test speed is 25km/h, the test load is 80kg, and the temperature is 25 +/-1 ℃.
TABLE 1 rolling resistance Performance test results
As can be seen from table 1, the rolling resistance value of example 1 is lower than that of comparative example 1, and the rolling resistance performance of example 1 is improved by 12.2% compared to that of comparative example 1. This is mainly because, the thickness optimal design of the crown portion in embodiment 1 makes the distribution of the inner contour of the tire body more reasonable, and can ensure the even expansion of the crown portion before and after the inflation of the tire, and reduce the overall strain energy of the crown portion, thereby achieving the good effect of improving the rolling resistance.
Tire endurance test
The tires of example 1 and comparative example 1 were subjected to a endurance running test at the same time. The test conditions were as follows:
the test speed is 25km/h, the tire pressure is 340kPa, the test load is 80kg, and the environmental temperature is 25 +/-5 ℃.
The tires of example 1 and comparative example 1 were examined for the presence of knocking over, delamination, bulging, etc. at 2000 km, 3000km, 4000 km, respectively.
TABLE 2 durability test results
| 2000 km | 3000km | 4000 km of | |
| Example 1 | No abnormality | No abnormality | No abnormality |
| Comparative example 1 | No abnormality | The tire tread has higher fatigue | Bulge and delamination |
It can be seen from table 2 that the tires of example 1 and comparative example 1 showed no significant difference in durability at the 2000 km stage. The tread fatigue level of comparative example 1 was significantly greater than that of example 1 at the 3000km stage. At the 4000 km stage, the tire surface of comparative example 1 had a bulge, and it was confirmed by the cut surface that delamination had occurred at the bulge position, whereas the tire of example 1 had no abnormality. Therefore, the endurance fatigue heat generation of the tire in the example 1 is obviously lower than that of the tire in the comparative example 1, namely, the endurance performance of the tire provided by the invention is better.
Tire wear performance test
The tires of example 1 and comparative example 1 were subjected to an actual loading (scooter) road test. In this case, the vehicle No. 1 and the vehicle No. 2 were equipped with the tire of example 1, and the vehicle No. 3 and the vehicle No. 4 were equipped with the tire of the mating proportion 1. The test conditions were as follows:
the road test system comprises a rider 80kg, tire pressure 340kPa, total road test mileage 3000km, and road condition proportions of 80% of asphalt roads, 15% of cement roads and 5% of slate roads. In the course of road test, the depth of the tread groove of the tires of example 1 and comparative example 1 was measured to characterize the wear performance of the tires.
TABLE 3 front wheel wear Performance test
TABLE 4 rear wheel wear Performance test
As is clear from tables 3 and 4, the data of the groove depth of the tread was not much different between example 1 and comparative example 1 after the tire road test of 3000 km. It can be seen that, although the thickness of the tread rubber of the example 1 is smaller than that of the comparative example 1, the effective abrasion volume of the tread of the example 1 is not reduced, namely, the abrasion performance of the tire provided by the utility model can meet the abrasion requirement within the standard mileage range.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. A tire comprising a tire frame member, the tire frame member comprising:
a pair of bead portions for mounting a rim;
a sidewall portion extending from the bead portion to an outer side in the tire radial direction;
a shoulder portion extending from the sidewall portion to an outer side in the tire radial direction;
a crown portion extending from the shoulder portion in a width direction of the tire;
wherein the ratio of the thickness of the crown part to the thickness of the shoulder part is 0.95-1.
2. The tire according to claim 1, wherein a ratio of a thickness of the sidewall portion to a thickness of the shoulder portion is 0.95 to 1.
3. The tire of claim 1, wherein the crown portion includes a tread band and the sidewall portion includes a sidewall band, the interface of the tread band and sidewall band being located in a middle region of the shoulder portion.
4. The tire of claim 3, wherein said crown portion further comprises a carcass layer and an air barrier layer, said tread band being disposed on an outer surface of said carcass layer and said air barrier layer being disposed on an inner surface of said carcass layer.
5. The tire of claim 4 wherein said carcass layer comprises a first ply and a second ply arranged in a stack, said first ply and said second ply turning up said bead portion.
6. The tire of claim 5 wherein said first ply and said second ply have a turn up end point differential rating of 4 to 9mm.
7. The tire of claim 6 wherein said first ply and said second ply are both nylon layers.
8. The tire of claim 3, wherein the tread band is provided with a tread groove and a tread pattern, and the base rubber of the tread groove has a thickness of 1.4 to 1.8mm.
9. The tire of claim 8 wherein the depth of the tread groove is from 2.5 to 3mm.
10. A vehicle, characterized by comprising a tyre according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222253958.4U CN218316096U (en) | 2022-08-25 | 2022-08-25 | Tire and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222253958.4U CN218316096U (en) | 2022-08-25 | 2022-08-25 | Tire and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218316096U true CN218316096U (en) | 2023-01-17 |
Family
ID=84885710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222253958.4U Active CN218316096U (en) | 2022-08-25 | 2022-08-25 | Tire and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218316096U (en) |
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2022
- 2022-08-25 CN CN202222253958.4U patent/CN218316096U/en active Active
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