CN214240310U - Bead structure of radial tire - Google Patents
Bead structure of radial tire Download PDFInfo
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- CN214240310U CN214240310U CN202022810498.1U CN202022810498U CN214240310U CN 214240310 U CN214240310 U CN 214240310U CN 202022810498 U CN202022810498 U CN 202022810498U CN 214240310 U CN214240310 U CN 214240310U
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Abstract
The utility model relates to a tire field, concretely relates to radial tire's tire bead structure. A bead structure of a radial tire, the bead comprises a carcass, a bead core and a sidewall, the carcass is turned up to the outside of the bead core by the bottom of the bead core, and the bead further comprises a steel wire reinforcing layer and a reinforcing filler rubber; the bead core comprises a steel wire ring and a supporting rubber; the steel wire reinforcing layer wraps the outer side of the tire body by winding around the bottom of the steel wire ring; the reinforcing filling rubber is positioned between the outer end points of the tire body and the steel wire reinforcing layer and between the supporting rubber and the tire side; the support glue comprises a first support glue and a second support glue, and the first support glue is positioned above the second support glue and in a space surrounded by the tire side and the tire body. The advantages are that: the reinforcing filling rubber balances the stress strain transition from the steel wire material to the rubber material, so that the material physical property matching is more reasonable, the stress strain is distributed in a balanced manner, the heat generation of the tire bead is reduced, the bearing capacity of the tire is improved, and the service life of the tire is prolonged.
Description
Technical Field
The utility model relates to a tire field, concretely relates to radial tire's tire bead structure.
Background
The bead, which means the portion of the tire mounted on the rim, is composed of a bead core, a reinforcing layer, a carcass, a sidewall, and the like. The tire bead is the first part with strong and weak tire bearing capacity, and the tire bead bears the stretching force generated by internal pressure and can bear the transverse force action in turning driving, so that the tire can bear the load in the vertical direction and resist the transverse force action. It must therefore have radial load-bearing capacity and resistance to transverse deformation.
Fig. 1 is a schematic structural diagram of a tire bead provided in the prior art, the tire bead includes a bead core, a reinforcing layer and a tire body, the bead core includes a bead ring and a supporting rubber, the reinforcing layer extends from the axial inner side of the supporting rubber to the axial outer side of the supporting rubber, and wraps the end of the bead ring and the end of the supporting rubber at one end of the bead ring together with the tire body.
However, in the tire bead with the structure, as only one reinforcing layer is arranged, in the loading process, the bending concentration point is a steel wire end point, the multi-degree region from the rubber material to the steel wire is too short, so that the stress is too concentrated, the stress strain is too concentrated at the tire body and the steel wire reinforcing end point, and the rubber material at the tire body and the steel wire reinforcing end point generates heat along with the bending deformation of the tire bead, so that the bearing capacity and the service life of the tire are shortened.
Therefore, how to excessively deform the tire bead position, so that the deflection deformation is uniformly distributed, and the stress is prevented from being excessively concentrated, thereby improving the performance of the tire bead position is a key technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a can improve tire bearing capacity and life's tire bead structure, concrete scheme is as follows:
a bead structure of a radial tire, the bead comprises a carcass, a bead core and a sidewall, the carcass is turned up to the outside of the bead core by the bottom of the bead core, and the bead further comprises a steel wire reinforcing layer and a reinforcing filler rubber;
the bead core comprises a steel wire ring and a supporting rubber; the steel wire reinforcing layer wraps the outer side of the tire body by winding around the bottom of the steel wire ring; the reinforcing filling rubber is positioned between the outer end points of the tire body and the steel wire reinforcing layer and between the supporting rubber and the tire side; the support rubber comprises a first support rubber and a second support rubber, and the first support rubber is positioned above the second support rubber and in a space surrounded by the tire side and the tire body; the second supporting glue is located below the first supporting glue and wraps the steel wire ring.
The reinforcing filling rubber is completely coated at the outer end points of the tire body and the steel wire reinforcing, the reinforcing filling rubber adopts a shape with improved size, and a material with specific physical property, and has physical property between the physical property of a steel wire and the physical property of an adjacent rubber material, so that the stress strain between the steel wire material and the rubber material is balanced, the size of the tire bead part is improved, the physical property is matched, the production attaching process and the stress are more reasonable, the deflection deformation of the tire bead part of the tire is more reasonable during bearing, the stress strain of the end point of the tire body or the end point of the steel wire reinforcing layer is reduced, the deformation and heat generation of the tire bead are reduced, and the bearing capacity and the service life of the tire are improved.
Preferably, the steel wire reinforcing layer is a steel cord fabric; the arrangement density range of the steel cords in the steel wire reinforced layer is 35-70 per decimeter; the included angle between the steel cord in the steel wire reinforced layer and the circumferential direction of the tire bead is 15-75 degrees; and the outer end point of the steel wire reinforcing layer is positioned at the bottom of the steel wire ring or between the bottom of the steel wire ring and the inner side of the supporting rubber.
Preferably, the height difference between the outer end point of the steel wire reinforcing layer and the outer end point of the tire body is 5 to 30mm or-5 to-30 mm.
Preferably, the inner end of the wire reinforcement layer is located at the bead ring bottom or between the bead ring bottom and the inner side of the support rubber.
Preferably, the rubber hardness of the second supporting rubber is greater than the rubber hardness of the first supporting rubber.
Preferably, the rubber hardness range of the second supporting rubber is Shore A hardness of 80-100; the rubber hardness range of the first supporting rubber is Shore A hardness of 55-75.
Preferably, the reinforcing filler rubber has a hardness in the range of Shore A hardness 60-95.
Preferably, the bead has a seating angle of 5 ° to 15 °.
The utility model discloses the advantage lies in: the reinforcing filler rubber is completely coated at the outer end points of the tire body and the steel wire reinforcement, has physical properties between the physical properties of the steel wire and the adjacent rubber material, balances the stress-strain transition from the steel wire material to the rubber material, makes the physical property matching between the materials more reasonable, and has balanced distribution of the stress-strain at the end points of the steel wire, thereby avoiding concentration, reducing the heat generation of the tire bead, and improving the bearing capacity and the service life of the tire.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Reference numerals: 100-tire body, 200-supporting rubber, 201-first supporting rubber, 202-second supporting rubber, 300-steel wire ring, 400-steel wire reinforcing layer, 700-reinforcing filling rubber, 800-tire side, 801-tire side rubber layer and 802-tire side wear-resistant rubber layer. Point B-the outer end point of the tire body, point C-the inner end point of the steel wire reinforced layer, and point D-the outer end point of the steel wire reinforced layer.
Detailed Description
Example 1
Referring to fig. 2, the radial tire bead structure of the present invention comprises a tire body (100), a bead core and a sidewall (800), wherein the tire body (100) wraps around the bottom of the bead core to the outside of the bead core, and the bead further comprises a steel wire reinforcing layer (400) and a reinforcing filler rubber (700); the bead core comprises a bead ring (300) and a support rubber (200); the steel wire reinforcing layer (400) wraps the bottom of the steel wire ring (300) and is coated outside the tire body (100); the reinforcing filling rubber (700) is positioned between the carcass (100), the outer end point D of the steel wire reinforcing layer (400) and the supporting rubber (200) and the sidewall (800); the support rubber (200) comprises a first support rubber (201) and a second support rubber (202), wherein the first support rubber (201) is positioned above the second support rubber (202) and in a space surrounded by the tire body (100); the second supporting glue (202) is positioned below the first supporting glue (201) and wraps the steel wire ring (300).
Wherein side wall (800) contain side wall glue film (801) and side wall wear-resisting glue film (802), wherein side wall glue film (801) and side wall wear-resisting glue film (802) are located the same layer and all laminate in reinforcement filler rubber (700) outside, and side wall wear-resisting glue film (802) are connected with side wall glue film (801), and bypass steel wire winding (300) bottom parcel in matrix (100) outside.
Wherein D in the figure is the outer end point of the steel wire reinforcing layer (400), C is the inner end point of the steel wire reinforcing layer (400), and B is the outer end point of the tire body 100; point a is the inboard end of the carcass 100.
In the embodiment, the D point of the outer end point of the steel wire reinforcing layer (400) is higher than the B5cm point of the outer end point of the carcass (100), namely, the height difference between the D point and the B point is 5 cm.
The inner end point C of the steel wire reinforcing layer (400) extends to the inner side of the supporting glue (200) by rounding the bottom of the steel wire ring (300).
The steel wire reinforcing layer (400) is a steel wire cord fabric; wherein the arrangement density range of the steel cords is 35 cords/dm;
the included angle between the steel cord in the steel wire reinforcing layer (400) and the circumferential direction of the tire bead is 15.
The rubber hardness of the second supporting rubber (202) is greater than that of the first supporting rubber (201), wherein the rubber hardness of the second supporting rubber (202) is Shore A hardness of 80, the rubber hardness of the first supporting rubber (201) is Shore A hardness of 55, and the hardness range of the reinforcing filling rubber (700) is Shore A hardness of 60; the seating angle of the bead is 5 °.
The included angle range of the steel wire curtain in the steel wire reinforced layer (400) and the radial direction of the tire bead is 15 degrees.
The tire bead structure enhances the rigidity of the tire bead, so that the stress strain at the end point of the steel wire reinforcing layer (400) is uniformly distributed, concentration is avoided, the heat generation of the tire bead is reduced, and the bearing capacity and the service life of the tire are improved.
Example 2
Referring to fig. 3 in detail, the radial tire bead structure of the present invention comprises a tire body (100), a bead core and a sidewall (800), wherein the tire body (100) wraps around the bottom of the bead core to the outside of the bead core, and the bead further comprises a steel wire reinforcing layer (400) and a reinforcing filler rubber (700); the bead core comprises a bead ring (300) and a support rubber (200); the steel wire reinforcing layer (400) wraps the bottom of the steel wire ring (300) and is coated outside the tire body (100); the reinforcing filling rubber (700) is positioned between the carcass (100), the outer end point D of the steel wire reinforcing layer (400) and the supporting rubber (200) and the sidewall (800); the support rubber (200) comprises a first support rubber (201) and a second support rubber (202), wherein the first support rubber (201) is positioned above the second support rubber (202) and in a space surrounded by the side wall (800) and the tire body (100); the second supporting glue (202) is positioned below the first supporting glue (201) and wraps the steel wire ring (300).
Wherein side wall (800) contain side wall glue film (801) and side wall wear-resisting glue film (802), wherein side wall glue film (801) and side wall wear-resisting glue film (802) are located the same layer and all laminate in reinforcement filler rubber (700) outside, and side wall wear-resisting glue film (802) are connected with side wall glue film (801), and bypass steel wire winding (300) bottom parcel in matrix (100) outside.
Wherein D in the figure is the outer end point of the steel wire reinforcing layer (400), C is the inner end point of the steel wire reinforcing layer (400), and B is the outer end point of the tire body 100; point a is the inboard end of the carcass 100.
In the embodiment, the outer end point D of the steel wire reinforcing layer (400) is lower than the outer end point B5cm of the tire body (100), namely, the height difference between the D point and the B point is-5 cm.
The inner end point C of the steel wire reinforcing layer (400) extends to the inner side of the supporting glue (200) by rounding the bottom of the steel wire ring (300).
The steel wire reinforcing layer (400) is a steel wire cord fabric; wherein the arrangement density range of the steel cords is 70 per decimeter;
the included angle between the steel cord in the steel wire reinforcing layer (400) and the circumferential direction of the tire bead is 75 degrees.
The rubber hardness of the second supporting rubber (202) is greater than that of the first supporting rubber (201), wherein the rubber hardness of the second supporting rubber (202) is Shore A hardness 100, the rubber hardness of the first supporting rubber (201) is Shore A hardness 75, and the hardness range of the reinforcing filling rubber (700) is Shore A hardness 95; the seating angle of the bead is 15 °.
The tire bead structure enhances the rigidity of the tire bead, so that the stress and strain at the end point of the steel wire reinforcing layer 400 are distributed in a balanced manner, concentration is avoided, the heat generation of the tire bead is reduced, and the bearing capacity and the service life of the tire are improved.
Claims (8)
1. A bead structure of a radial tire, the bead comprising a carcass (100), a bead core and a sidewall (800), the carcass (100) being turned up to the outside of the bead core around the bottom of the bead core, characterized in that:
the bead further comprises a wire reinforcement layer (400) and a reinforcing filler (700);
the bead core comprises a bead ring (300) and a support rubber (200);
the steel wire reinforcing layer (400) wraps the bottom of the steel wire ring (300) and is coated outside the tire body;
the reinforcing filling rubber (700) is positioned between the outer end points of the tire body (100) and the steel wire reinforcing layer (400) and the supporting rubber (200) and the tire side;
the support rubber (200) comprises a first support rubber (201) and a second support rubber (202), wherein the first support rubber (201) is positioned above the second support rubber (202) and in a space surrounded by the side wall (800) and the tire body (100); the second supporting glue (202) is positioned below the first supporting glue (201) and wraps the steel wire ring (300).
2. A bead structure for a radial tire according to claim 1, wherein: the steel wire reinforcing layer (400) is a steel wire cord fabric;
the arrangement density range of the steel cords in the steel wire reinforcing layer (400) is 35-70 per decimeter;
the included angle between the steel cord in the steel wire reinforcing layer (400) and the circumferential direction of the tire bead is 15-75 degrees;
the outer end point of the steel wire reinforcing layer (400) is positioned at the bottom of the steel wire ring (300) or positioned between the bottom of the steel wire ring (300) and the inner side of the supporting glue (200).
3. A bead structure for a radial tire according to claim 2, wherein: the height difference between the outer end point of the steel wire reinforcing layer (400) and the outer end point of the tire body (100) is 5-30 mm or-5-30 mm.
4. A bead structure for a radial tire according to claim 3, wherein: the inner end point of the steel wire reinforcing layer (400) is positioned at the bottom of the steel wire ring (300) or extends from the bottom of the steel wire ring (300) to the inner side of the supporting glue (200).
5. A bead structure for a radial tire according to claim 4, wherein: the rubber hardness of the second supporting rubber (202) is greater than that of the first supporting rubber (201).
6. A bead structure for a radial tire according to claim 5, wherein: the rubber hardness range of the second supporting rubber (202) is Shore A hardness 80-100;
the rubber hardness range of the first supporting rubber (201) is Shore A hardness of 55-75.
7. A bead structure for a radial tire according to claim 6, wherein: the hardness range of the reinforcing filling adhesive (700) is Shore A hardness 60-95.
8. A bead structure for a radial tire according to any one of claims 1 to 7, wherein: the seat angle of the tire bead is 5-15 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022810498.1U CN214240310U (en) | 2020-11-30 | 2020-11-30 | Bead structure of radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022810498.1U CN214240310U (en) | 2020-11-30 | 2020-11-30 | Bead structure of radial tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214240310U true CN214240310U (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022810498.1U Active CN214240310U (en) | 2020-11-30 | 2020-11-30 | Bead structure of radial tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214240310U (en) |
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2020
- 2020-11-30 CN CN202022810498.1U patent/CN214240310U/en active Active
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