阅读说明：本技术 一种用于轻型载重车辆的胎圈及应用其制造的轮胎 (Tire bead for light load-carrying vehicle and tire manufactured by applying same ) 是由 王�锋 杨宝忠 陈东 滕雷 朱丽艳 于 2019-11-04 设计创作，主要内容包括：本发明涉及一种用于轻型载重车辆的胎圈及应用其制造的轮胎,属于胎圈制造技术领域,包括与安装轮辋相接触的胎圈钢丝、通过围绕在环形的胎圈钢丝上从而锚固在胎圈上的胎体增强件和置于每个胎圈钢丝的外侧且在胎体增强件的卷曲空间内的胎圈填充料,所述胎圈填充料由第一胎圈填充料和第二胎圈填充料重叠复合形成,所述第一胎圈填充料和第二胎圈填充料均置于胎圈钢丝的径向外侧,还包括橡胶增强件,所述橡胶增强件置于胎体增强件和胎侧之间,所述橡胶增强件沿周向形成,所述第一胎圈填充料、第二胎圈填充料和橡胶增强件均采用低生热胶料材质,用以解决现有技术中轮胎的胎圈因超载而产生积热导致鼓包或脱层的技术问题。(The invention relates to a tire bead for light load vehicle and a tire manufactured by applying the same, belonging to the technical field of tire bead manufacturing, comprising tire bead steel wires contacted with a mounting rim, a tire body reinforcing member anchored on the tire bead by winding on the annular tire bead steel wires, and a tire bead filler arranged at the outer side of each tire bead steel wire and in the curling space of the tire body reinforcing member, the tire bead filler is formed by overlapping and compounding a first tire bead filler and a second tire bead filler, the first tire bead filler and the second tire bead filler are both arranged at the radial outer side of the tire bead steel wire, and the tire bead filler also comprises a rubber reinforcement, the rubber reinforcement being interposed between the carcass reinforcement and the sidewalls, the rubber reinforcement being formed in the circumferential direction, the first bead filler, the second bead filler and the rubber reinforcement are made of low-heat-generation rubber materials, the tire bead is used for solving the technical problem that the bead of the tire in the prior art generates heat accumulation due to overload to cause bulging or delamination.)

1. A bead for a light load vehicle, comprising bead wires in contact with a mounting rim, a carcass reinforcement anchored to the bead by being wound around the annular bead wires, and a bead filler disposed outside each bead wire and in a crimp space of the carcass reinforcement, characterized in that: the tire bead filler is formed by overlapping and compounding a first tire bead filler and a second tire bead filler, the first tire bead filler and the second tire bead filler are arranged on the radial outer side of a tire bead steel wire, the tire bead filler further comprises a rubber reinforcing piece, the rubber reinforcing piece is arranged between a tire body reinforcing piece and a tire side, the rubber reinforcing piece is formed along the circumferential direction, and the first tire bead filler, the second tire bead filler and the rubber reinforcing piece are made of low-heat-generation rubber materials.

2. A bead for a light weight load vehicle as recited in claim 1 wherein: further comprising a bead-constraining reinforcement wound around the bead wire in a helical fashion.

3. A bead for a light weight load vehicle as recited in claim 1 wherein: the rubber reinforcement extends along the radial direction of the tire, the rubber reinforcement adopts rubber compound with Shore hardness not more than 86 in a vulcanized state, and the axial thickness h1 numerical range of the rubber reinforcement is as follows: h1 is not less than 0.1mm and not more than 10mm, the rubber reinforcement is crescent with middle part thickness greater than both sides thickness, the length dimension L1 numerical range of rubber reinforcement: l1 is more than or equal to 0.1mm and less than or equal to 10 mm.

4. A bead for a light weight load vehicle as recited in claim 3 wherein: the rubber reinforcement is at the installation positioning size between matrix reinforcement and the side wall and is: the range of values for radially inner height RH1 is: RH1 is more than 0mm and less than or equal to 20cm, and the numerical range of the radial outer height RH2 is as follows: RH1 is more than 0mm and less than or equal to 20 cm.

5. A bead for a light weight load vehicle as recited in claim 1 wherein: the first tire bead filler and the second tire bead filler are both rubber materials with Shore hardness not more than 90 in a vulcanized state.

6. A bead for a light weight load vehicle as recited in claim 5 wherein: the first bead filler has a thickness h2 in the radial direction that ranges from: h2 is more than or equal to 0.1mm and less than or equal to 15mm, the axial thickness of the steel plate is in a gradual change type, and the thickness of the radial inner side is larger than that of the radial outer side.

7. A bead for a light weight load vehicle as recited in claim 5 wherein: the thickness h3 of the second bead filler in the radial direction has a value range: h3 is more than or equal to 0.1mm and less than or equal to 15mm, and the axial thickness is uniformly distributed.

8. A bead for a light weight load vehicle according to claim 7 wherein: the first bead filler is located on the radial outer side of the bead wire, and the height HL1 of the part extending along the radial outer side is within the numerical range: 0mm < HL1 < SH 70%, and the second bead filler is positioned at the radial outer side of the first bead filler, and the height HL2 of the part extending along the radial outer side is in a numerical range of: 0mm < HL2 < SH 70%, where SH is the radial height of the tire.

9. A bead for a light weight load vehicle as recited in claim 8 wherein: the width W numerical range of the overlapping and compounding area of the first bead filler and the second bead filler is as follows: w is more than 0mm and less than 20 cm.

10. A tyre made by applying the beads of any one of claims 1 to 9, characterized in that: comprising a crown, two sidewalls and a bead, the crown comprising a tread rubber layer and a crown reinforcement formed from steel wires and nylon fibers in the circumferential direction of the tire, the crown reinforcement being circumferentially covered by the tread rubber layer, the sidewalls extending radially outwardly from the bead to the crown.

Technical Field

The invention relates to a tire bead for a light-duty truck and a tire manufactured by applying the tire bead, and belongs to the technical field of tire bead manufacturing.

Background

The bead portion of a general light truck tire generally includes: a bead wire intended to come into contact with the mounting rim for fixing the tyre to the rim; at least one carcass reinforcement anchored to each bead by being wound around the bead wire; a bead filler disposed outside each bead wire and inside the crimp space of the carcass reinforcement; because the bead part of the tire is a high stress concentration area in the use process of the tire, when a force exceeding the standard load is applied in the radial direction of the tire, the tire repeatedly rubs between the carcass reinforcement and the bead wire under a long-time high torsional stress, so that the accumulated heat between the carcass reinforcement and the bead wire is increased, the problem of early-rise damage and bulging or delamination of the bead part of the tire caused by overload is caused, and great driving safety hazards exist.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a tire bead for a light load-carrying vehicle and a tire manufactured by applying the tire bead, which are used for solving the technical problem that the tire bead of the tire in the prior art generates heat accumulation due to overload to cause bulging or delamination.

The technical scheme for solving the technical problems is as follows: the tire bead for the light truck comprises tire bead steel wires, a tire body reinforcing piece and tire bead fillers, wherein the tire bead reinforcing piece is in contact with a mounting rim, the tire body reinforcing piece is anchored on the tire bead through winding on the annular tire bead steel wires, the tire bead fillers are arranged on the outer side of each tire bead steel wire and in a curling space of the tire body reinforcing piece, the tire bead fillers are formed by overlapping and compounding a first tire bead filler and a second tire bead filler, the first tire bead filler and the second tire bead filler are arranged on the radial outer side of the tire bead steel wires, the rubber reinforcing piece is arranged between the tire body reinforcing piece and a tire side, the rubber reinforcing piece is formed in the circumferential direction, and the first tire bead filler, the second tire bead filler and the rubber reinforcing piece are made of low-heat-generating rubber materials.

The invention has the beneficial effects that: the tire bead filler is arranged, the joint position of the first tire bead filler, the second tire bead filler and the rubber reinforcing piece is reasonably staggered, so that the stress of the tire bead part is dispersed, meanwhile, the low-heat-generation rubber material is adopted, the heat concentration of the tire bead part can be reduced, the durability of the tire bead part under the overload condition is improved, and particularly, the delaminating capability of the tire bead and the tire body reinforcing piece caused by heat generation and stress concentration is improved.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, a bead-constraining reinforcement is included, wound around the bead wire in a helical covering.

The beneficial effect who adopts above-mentioned further scheme is through setting up the tire bead restraint reinforcement, retrains the tire bead steel wire, improves the intensity of tire bead steel wire to improve the bulk strength of tire bead.

Further, the rubber reinforcement extends along the radial direction of the tire, the rubber reinforcement adopts rubber compound with Shore hardness not more than 86 in a vulcanized state, and the axial thickness h1 of the rubber reinforcement is within the numerical range of: h1 is not less than 0.1mm and not more than 10mm, the rubber reinforcement is crescent with middle part thickness greater than both sides thickness, the length dimension L1 numerical range of rubber reinforcement: l1 is more than or equal to 0.1mm and less than or equal to 10 mm.

The rubber reinforcement piece has the beneficial effects that the low heat generation performance of the rubber reinforcement piece is improved by limiting the material, the axial thickness and the length size of the rubber reinforcement piece, the heat concentration of the tire bead part is reduced, and the durability of the tire bead part under the overload condition is improved.

Further, the rubber reinforcement is at the installation positioning size between matrix reinforcement and the side wall and is: the range of values for radially inner height RH1 is: RH1 is more than 0mm and less than or equal to 20cm, and the numerical range of the radial outer height RH2 is as follows: RH1 is more than 0mm and less than or equal to 20 cm.

The rubber reinforcement part is arranged on the tire bead, and the rubber reinforcement part is arranged on the tire bead.

Further, the first bead filler and the second bead filler are both rubber compounds with Shore hardness not more than 90 in a vulcanized state.

Further, the first bead filler has a thickness h2 in the radial direction that ranges from: h2 is more than or equal to 0.1mm and less than or equal to 15mm, the axial thickness of the steel plate is in a gradual change type, and the thickness of the radial inner side is larger than that of the radial outer side.

Further, the thickness h3 of the second bead filler in the radial extension has a value ranging from: h3 is more than or equal to 0.1mm and less than or equal to 15mm, and the axial thickness is uniformly distributed.

Further, the height HL1 of the portion of the first bead filler located radially outside the bead wire and extending radially outside is within a numerical range of: 0mm < HL1 < SH 70%, and the second bead filler is positioned at the radial outer side of the first bead filler, and the height HL2 of the part extending along the radial outer side is in a numerical range of: 0mm < HL2 < SH 70%, where SH is the radial height of the tire.

Further, the width W of the overlapping composite area of the first bead filler and the second bead filler is within a numerical range of: w is more than 0mm and less than 20 cm.

The further scheme has the advantages that the low heat buildup property and the high viscosity modulus property of the first bead filler and the second bead filler are improved by limiting the materials of the first bead filler and the second bead filler, and the influence of the low heat buildup property of the first bead filler and the second bead filler on the delamination of the bead and the tire body reinforcement caused by heat generation and stress concentration is further improved by limiting the thickness and the height range of the radial extension of the first bead filler and the second bead filler.

A tire made by applying the above bead, comprising a crown, two sidewalls and a bead, the crown comprising a tread rubber layer and a crown reinforcement, the crown reinforcement being formed of steel wires and nylon fibers in the circumferential direction of the tire, the crown reinforcement being circumferentially covered by the tread rubber layer, the sidewalls extending radially outwardly from the bead to the crown.

Drawings

FIG. 1 is a radial cross-sectional view of a prior art tire;

FIG. 2 is a radial cross-sectional view of a tire according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the rubber reinforcement of FIG. 2;

FIG. 4 is an enlarged schematic view of the bead filler of FIG. 2;

FIG. 5 is a schematic view of the positioning of the bead filler of FIG. 2;

fig. 6 is a schematic view of the positioning of the rubber reinforcement.

In the figure 10, the carcass reinforcement, 20, the crown, 30, the sidewalls, 40, the bead wires, 50, the bead filler, 60, the rubber reinforcement, 70, the bead constraining reinforcement, 21, the tread rubber layer, 22, the crown reinforcement, 51, the second bead filler, 52, the first bead filler.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1-6, the expression "radial" when used relates to the radial direction of the tire, the expression "radially inward" if closer to the axis of rotation of the tire, and the expression "circumferential" when used relates to the rolling direction of the tire;

the radial height SH is defined as: the radial distance between the radially innermost point of the tire bead wire and the radially outermost point of the tread when the tire is mounted on a rim;

the axial level M of the tire is defined as: when the tyre is mounted on the rim, the plane of the radially innermost side of the tyre bead lies;

the height HL1 of the portion of the first bead filler extending radially outward is defined as: a radial distance from a radially outermost point of the tire bead to a highest point of the first bead filler extending radially outward;

the height HL2 of the portion of the second bead filler extending radially outward is defined as: a radial distance from a radially outermost point of the tire bead to a highest point of the second bead filler extending radially outward;

the width W of the overlapped composite area of the first bead filler and the second filler is defined as: a distance from a radially innermost point to an outermost point of the overlap;

the rubber reinforcement positioning radially inner height RH1 is defined as: when the tire is installed on a rim, the radial distance from the horizontal plane where the radially innermost point of the tire bead wire is located to the radially innermost point of the rubber reinforcement;

the rubber reinforcement positioning radially inner height RH2 is defined as: the radial distance from the horizontal plane of the radially innermost point of the bead wire of the tire to the radially outermost point of the rubber reinforcement when the tire is mounted on a rim.

A tire bead for light load vehicle, comprising a tire bead wire 40 contacting with a mounting rim, a carcass reinforcement 10 anchored on the tire bead by winding around the annular tire bead wire 40, and a tire bead filler 50 disposed outside each tire bead wire 40 and in the crimp space of the carcass reinforcement 10, wherein the tire bead filler 50 is formed by overlapping and compounding a first tire bead filler 52 and a second tire bead filler 51, the first tire bead filler 52 and the second tire bead filler 51 are disposed radially outside the tire bead wire 40, the first tire bead filler 52 and the second tire bead filler 51 are both made of rubber compound having Shore hardness of not more than 90 in a vulcanized state, and the thickness h2 of the first tire bead filler 52 in the radial extension is in a numerical range of: h2 is more than or equal to 0.1mm and less than or equal to 15mm, the axial thickness of the second bead filler 51 is gradually changed, the radial inner side thickness is larger than the radial outer side thickness, and the thickness h3 of the second bead filler 51 in the radial extension range is as follows: h3 is more than or equal to 0.1mm and less than or equal to 15mm, the axial thickness of the first bead filler 52 is uniformly distributed, the first bead filler 52 is positioned at the radial outer side of the bead wire 40, and the height HL1 of the part extending along the radial outer side is within the numerical range: 0mm < HL1 < SH 70%, and the second bead filler 51 is located radially outside the first bead filler 52, and the height HL2 of a portion extending radially outside has a value in the range of: 0mm < HL2 < SH 70%, where SH is the radial height of the tire, and the width W of the overlapping composite region of the first bead filler 52 and the second bead filler 51 has a value ranging from: the thickness of the first bead filler 52 and the second bead filler 51 in the radial direction is limited, and the influence of the low heat buildup property of the first bead filler 52 and the second bead filler 51 on the delamination of the bead and the carcass reinforcement 10 caused by heat generation and stress concentration is further improved by limiting the thickness and height range of the first bead filler 52 and the second bead filler 51 in the radial direction.

The tire further comprises a rubber reinforcing member 60, wherein the rubber reinforcing member 60 is arranged between the carcass reinforcing member 10 and the sidewall 30, the rubber reinforcing member 60 is formed along the circumferential direction, the first bead filler 52, the second bead filler 51 and the rubber reinforcing member 60 are all made of low-heat-generation rubber compound materials, the rubber reinforcing member 60 extends along the radial direction of the tire, the rubber reinforcing member 60 is made of rubber compound materials with Shore hardness not more than 86 in a vulcanized state, and the axial thickness h1 of the rubber reinforcing member 60 is within a numerical range of: h1 is not less than 0.1mm and not more than 10mm, rubber reinforcement 60 is the crescent of middle part thickness greater than both sides thickness, the length dimension L1 numerical range of rubber reinforcement 60: l1 is more than or equal to 0.1mm and less than or equal to 10mm, the low heat generating performance of the rubber reinforcing part 60 is improved by limiting the material and the axial thickness and the length size of the rubber reinforcing part 60, the heat concentration of the tire bead part is reduced, the durability of the tire bead part under the overload condition is improved, and the installation positioning size of the rubber reinforcing part between the tire body reinforcing part 10 and the tire side 30 is as follows: the range of values for radially inner height RH1 is: RH1 is more than 0mm and less than or equal to 20cm, and the numerical range of the radial outer height RH2 is as follows: the RH1 is more than 0mm and less than or equal to 20cm, the positioning size of the rubber reinforcing piece 60 is limited, the inhibiting effect of the low heat generating performance of the rubber reinforcing piece 60 on the heat concentration of the tire bead part is further improved, and the durability of the tire bead part under the overload condition is improved.

The tyre further comprises a tyre bead restraining reinforcing piece 70, wherein the tyre bead restraining reinforcing piece 70 is wound on the tyre bead steel wire 40 in a spiral shape and covers and winds the tyre bead steel wire 40 in a spiral shape, and the tyre bead restraining reinforcing piece 70 is arranged to restrain the tyre bead steel wire 40, so that the strength of the tyre bead steel wire 40 is improved, and the integral strength of the tyre bead is improved.

By arranging the bead filler 50, the joint positions of the first bead filler 52, the second bead filler 51 and the rubber reinforcement 60 are reasonably staggered, so that the stress of the bead part is dispersed, and meanwhile, the low-heat-generation rubber material is adopted, so that the heat concentration of the bead part can be reduced, the durability of the bead part of the tire under the overload condition is improved, and particularly, the capability of the bead and the tire body reinforcement 10 of delaminating caused by heat generation and stress concentration is improved.

A tire made by applying the above-mentioned bead, comprising a crown 20, two sidewalls 30 and beads, said crown 20 comprising a tread rubber layer 21 and a crown reinforcement 22, said crown reinforcement 22 being formed of steel wires and nylon fibers in the circumferential direction of the tire, said crown reinforcement 22 being circumferentially surmounted by the tread rubber layer 21, said sidewalls 30 extending radially outwards from the beads to the crown 20.

Comparative example: a well-known 185R14C gauge tire;

experimental example: a tire manufactured by applying the bead of the above embodiment;

table 1:

name of component	Comparative example	Examples of the experiments
			First bead filler	Is provided with	Is composed of (hardness is 60-80)
Second bead filler	Is free of	Has (hardness)Is 60-80)
			Rubber reinforcement	Is free of	Is composed of (hardness < 86)
Bead-constraining reinforcement	Is free of	Is provided with
			Test results	100％	150％

Table 2:

comparative experiment: and (3) carrying out a comparison experiment on the low-speed high-load traveling machine tool, wherein the traveling performance of the experimental example is improved by 50% compared with the ratio.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.