Run-flat tire

Abstract

The utility model discloses a run-flat tire, which relates to the technical field of tires, and comprises a tire crown, a tire shoulder and a tire sidewall, the tire crown, the tire shoulder and the tire sidewall form the tread of the tire, the tire crown is a surface vertical to the circular cross section of the tire, the tire sidewall is a surface parallel to the circular cross section of the tire, and the tire shoulder is arranged on the surface of the tire. The tire shoulder is a connecting part of the tire crown and the tire side wall, and the tire is characterized in that a reinforcing layer is arranged on the inner side of the tire tread, pattern blocks are arranged on the surface of the tire crown, main grooves are formed between the pattern blocks, and grooves are formed in the centers of the pattern blocks. According to the utility model, the narrow grooves in the circumferential direction are additionally arranged on the tire crown central pattern block, and the rigidity of the tire crown central pattern block is weakened, so that the outer diameter of the tire is increased and the height of a parting line between the tire crown center and the tire side wall is also increased under the condition that the tire is inflated, and therefore, the deformation interval of the tire is increased, and the comfort is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire technical field, specifically is a tire with run-flat capability. BACKGROUND

[0002] The common tire with run-flat capability can bear limited deformation degree due to the design requirement of the enhanced sidewall, and the adverse feedback of the road is obviously greater than the general tire, which can seriously affect the ride comfort of the vehicle.

[0003] Based on this, the present application provides a tire with run-flat capability, which can eliminate the drawbacks of the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a tire with run-flat capability to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A tire with run-flat capability, comprising a crown, a shoulder and a sidewall, the crown, the shoulder and the sidewall constitute the tread of the tire, the crown is a surface perpendicular to the circular cross section of the tire, the sidewall is a surface parallel to the circular cross section of the tire, the shoulder is the connecting part of the crown and the sidewall, the inner side of the tread is provided with a reinforcing layer, the surface of the crown is provided with a pattern block, the pattern block is provided with a main groove between the pattern blocks, and the center of the pattern block is provided with a groove.

[0007] On the basis of the above technical scheme, the utility model also provides the following optional technical scheme:

[0008] In an optional scheme, the reinforcing layer comprises a bead filler layer, the bead filler layer is arranged on the inner side of the sidewall, the bottom of the bead filler layer is provided with a steel wire ring, the inner side of the bead filler layer is provided with a carcass framework, the outer side of the bead filler layer is provided with a reinforcing profile, the upper end of the bead filler layer is provided with a reinforcing rubber layer, the inner side of the reinforcing rubber layer is provided with an inner layer with air-tightness, and the inner side of the crown is provided with a buffer belt.

[0009] In an optional scheme, the cross section of the reinforcing rubber layer is crescent-shaped.

[0010] In an optional scheme, the buffer belt is arranged in the form of multi-layer stacking on the inner side of the crown.

[0011] In an optional scheme, the width of the groove is 2mm-1 / 2 the width of the main groove, and the depth of the groove is ≤ the depth of the main groove.

[0012] In an optional scheme, the tan delta of the reinforcing rubber layer at 60℃ is 0.05-0.15.

[0013] In an alternative, the bead filler layer is designed to have a Shore hardness of between 70° and 82°.

[0014] Compared with the prior art, the utility model has the advantages as follows:

[0015] The utility model discloses a narrow groove design is added in the circumferential direction on the crown center pattern block, and the rigidity of the crown center pattern block is weakened, so that the outer diameter of the tire is increased under the inflation condition, and the height of the crown center and the tire side dividing line is also increased, thereby increasing the deformation interval of the tire and improving the comfort. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model.

[0017] Figure 2 It is the structure schematic diagram of the reinforcing layer in the utility model.

[0018] Figure 3 It is the structure schematic diagram of the pattern block in the utility model.

[0019] Figure 4 It is the section view of the groove in the utility model.

[0020] Marked note: 1, the bead filler layer;2, the bead wire;3, the tire body framework;4, the inner layer;5, the reinforcing rubber layer;6, the reinforcing section bar;7, the buffer belt;8, the crown;9, the shoulder;10, the tire side. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is in combination with the drawings and example, and the utility model is further detailed.

[0022] In one embodiment, as shown in Figures 1-3 A run-flat tire, including the crown 8, the shoulder 9 and the tire side 10, the crown 8, the shoulder 9 and the tire side 10 constitute the tread of the tire, the crown 8 is the surface perpendicular to the circular cross section of the tire, the tire side 10 is the surface parallel to the circular cross section of the tire, the shoulder 9 is the connecting part of the crown 8 and the tire side 10, the inner side of the tread is provided with the reinforcing layer, the surface of the crown 8 is provided with the pattern block, the pattern block is provided with the main groove between the pattern blocks, and the pattern block center is provided with the groove, and the reinforcing layer is arranged to meet the running performance requirement of the tire under the pressure loss condition.

[0023] In one embodiment, as shown in Figure 2As shown, the reinforcing layer includes a bead filler layer 1, which is located inside the sidewall 10. A steel wire ring 2 is located at the bottom of the bead filler layer 1. A carcass skeleton 3 is located inside the bead filler layer 1. A reinforcing profile 6 is located outside the bead filler layer 1. A reinforcing rubber layer 5 is located at the top of the bead filler layer 1. An airtight inner layer 4 is located inside the reinforcing rubber layer 5. A buffer belt 7 is located inside the tread 8. Through the combined action of the bead filler layer 1, the steel wire ring 2, the carcass skeleton 3, the inner layer 4, the reinforcing rubber layer 5, the reinforcing profile 6, and the buffer belt 7, the strength of the sidewall 10 is greatly increased.

[0024] In one embodiment, such as Figure 2 As shown, the cross-section of the reinforcing rubber layer 5 is crescent-shaped, giving the tire sidewall 10 better vertical elasticity.

[0025] In one embodiment, such as Figure 2 As shown, the buffer belt 7 is arranged in a multi-layer stacked form inside the tire crown 8, and a better buffering effect can be obtained through multi-layer stacking.

[0026] In one embodiment, such as Figure 3 As shown, the width of the groove is 2mm to 1 / 2 the width of the main groove, and the depth of the groove is less than or equal to the depth of the main groove. This weakens the rigidity of the tread block at the center of the tread, increasing the outer diameter of the tire under inflation conditions, while also increasing the height between the center of the tread and the sidewall dividing line, thereby increasing the tire's deformation range and improving comfort.

[0027] In one embodiment, the reinforcing rubber layer 5 has a tanδ of 0.05 to 0.15 at 60°C.

[0028] In one embodiment, the bead filler layer is designed with a Shore hardness between 70° and 82°.

[0029] The above embodiments disclose a run-flat tire. Common run-flat tires, due to the design requirements of reinforced sidewalls, have limited deformation tolerance and are subject to significantly greater adverse road feedback than ordinary tires, which seriously affects vehicle ride comfort. This utility model weakens the rigidity of the tread block by adding a narrow circumferential groove to the tread center block. Under inflation conditions, this increases the tire's outer diameter and the height between the tread center and the sidewall dividing line, thereby increasing the tire's deformation range and improving comfort.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A run-flat tire comprising a crown (8), a shoulder (9) and a side (10), said crown (8), said shoulder (9) and said side (10) constituting the tread of the tire, said crown (8) being a surface perpendicular to the circular section of the tire, said side (10) being a surface parallel to the circular section of the tire, said shoulder (9) being the junction of said crown (8) and said side (10), characterized in that, The inner side of the tread is provided with a reinforcing layer, the surface of the crown (8) is provided with blocks, the blocks are provided with main grooves, and the center of the blocks is provided with a groove.

2. A run-flat tire according to claim 1, wherein The reinforcing layer comprises a bead filler layer (1), the bead filler layer (1) is arranged in the inner side of the sidewall (10), the bottom of the bead filler layer (1) is provided with a steel ring (2), the inner side of the bead filler layer (1) is provided with a carcass skeleton (3), the outer side of the bead filler layer (1) is provided with a reinforcing profile (6), the upper end of the bead filler layer (1) is provided with a reinforcing rubber layer (5), the inner side of the reinforcing rubber layer (5) is provided with an inner layer (4) in the form of air tightness, and the inner side of the crown (8) is provided with a buffer belt (7).

3. A run-flat tire according to claim 2, wherein The cross section of the reinforcing rubber layer (5) is crescent-shaped.

4. A run-flat tire according to claim 2, wherein The buffer belt (7) is arranged in the inner side of the crown (8) in the form of multi-layer stacking.

5. A run-flat tire according to claim 1, wherein The width of the groove is 2mm-1 / 2 of the width of the main groove, and the depth of the groove is ≤ the depth of the main groove.

6. A run-flat tire according to claim 2 wherein, The tan delta of the reinforcing rubber layer (5) at 60℃ is 0.05-0.

15.

7. A run-flat tire according to claim 2 wherein, The bead filler layer is designed between Shore hardness 70°-82°.

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