CN218228530U - Tire with good seam allowance durability - Google Patents

Abstract

The utility model provides a tire with good seam allowance durability, which comprises a tire body cord fabric which turns back from the inner side to the outer side along the periphery of the tire seam allowance, a seam allowance protective rubber which is arranged at the axial outer side of the tire body cord fabric, a transition protective layer which is arranged at the axial outer side of the seam allowance protective rubber and a tire bead which extends from the axial outer side to the inner side along the transition protective layer, wherein the tire body cord fabric turns back along the periphery of the seam allowance to form a main part and a turn-back part, the utility model discloses an increase one deck transition inoxidizing coating in rim stress concentration area, can strengthen tire matrix and rim protection and glue adhesion degree between the while and provide a buffer zone in stress concentration area to will delay tire rim production swell and delaminating probability by a wide margin, extension tire life, the side wall axial outside still is equipped with the rim protective layer, combine transition inoxidizing coating further to promote rim rigidity, finally realize the durable obvious improvement of tire rim, and less to tire cost influence.

Description

Tire with good seam allowance durability

Technical Field

The utility model relates to a tire technical field, concretely relates to tire with good rim of a mouth durability can.

Background

Tires made of rubber, fiber, or metal frame material deform when inflated with a certain air pressure. In the running process of the tire, a certain part of the tire is subjected to larger stress due to the action of applied load, driving force, transverse force and the like, and the fact that the crown part and the seam part of the tire are subjected to larger pressure can be found through Finite Element Analysis (FEA). The tire is most likely to bulge or crack at the crown and the sub-opening part in actual use. In order to solve the problem of bead bulging or delamination, most tire manufacturers adopt modes of adding more reinforcing materials to the bead, for example, adding one or two layers of reinforcing layers made of cord thread materials to the bead, or adding outer apex and the like to improve durability, the core of the modes is to increase the rigidity of the bead so as to achieve the purpose of improving durability, but the modes greatly improve the tire process difficulty and have limited durability improving effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses an increase one deck transition inoxidizing coating in rim of mouth stress concentration area, both can strengthen the adhesion degree between tire matrix and rim of mouth protection glue layer and can provide a buffer zone in stress concentration area simultaneously to promote tire rim of mouth rigidity, finally realize promoting rim of mouth rigidity, and the durable obvious improvement of rim of mouth, concrete technical scheme is as follows:

a tire with good seam allowance durability comprises a tire body cord fabric layer and a seam allowance protective rubber, wherein the tire body cord fabric layer is folded back from the inner side to the outer side of the axial direction of the tire body cord fabric layer along the periphery of a tire seam allowance, the seam allowance protective rubber is arranged on the outer side of the axial direction of the seam allowance protective rubber, and the tire bead extends from the outer side to the inner side of the axial direction of the transition protective rubber.

Preferably, the carcass ply is folded back along the periphery of the bead to form a main portion and a folded-back portion.

Preferably, the tire further comprises an inner liner arranged on the inner side of the carcass ply and a chafer which extends from the inner side of the axial direction of the inner liner to the bottom end of the turn-up part along the periphery of the seam and is positioned on the inner side of the tire bead.

Preferably, a radially lowermost end of the bead filler is joined to an axially outermost end of the chafer at an outer-side lowermost end of the turn-back portion.

Preferably, the radial bottommost end of the transition protective layer is arranged vertically above the radial bottommost end of the bead protection rubber, and the radial topmost end of the transition protective layer is located vertically above the radial topmost end of the bead.

Preferably, the radially topmost end of the tire bead is arranged on the axially outer side of the transition protective layer, and the bottom end of the tire bead sequentially extends along the transition protective layer, the bead filler and the chafer and is stopped on the outer side of the chafer.

Preferably, the tire further comprises a sidewall arranged on the outer side of the bead opening protection rubber in the axial direction, and the bottom end of the sidewall is jointed with the top end of the tire bead.

Preferably, the outer side of the axial direction of the tire side is further provided with a rim protective layer, and the rim protective layer extends from the outer side of the tire side to the outer side of the tire bead.

Preferably, the width of the middle platform of the rim protection layer is K, and K is more than or equal to 2.0mm and less than or equal to 8.0mm.

According to the technical solution provided by the utility model, the utility model discloses following beneficial effect has: through increasing one deck transition inoxidizing coating in rim stress concentration area, the width of this transition inoxidizing coating passes through stress concentration area, can strengthen providing a buffer area in stress concentration area when the adhesion degree between tire matrix and rim protective rubber, thereby will delay tire rim production swell and delaminating probability by a wide margin, extension tire life, in addition, the side wall axial outside still is equipped with the rim protective layer, combine transition inoxidizing coating further to promote rim rigidity, finally realize the durable obvious improvement of tire rim, and it is less to tire cost influence.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 10. a carcass ply; 110. a main section; 120. a fold-back section; 20. a seam allowance protective adhesive; 30. a transition protective layer; 40. a bead; 50. an airtight layer; 60. a chafer; 70. a sidewall; 80. a rim protection layer.

Detailed Description

The present invention will be described in detail with reference to the drawings and specific embodiments, wherein prior to describing the technical aspects of the embodiments of the present invention in detail, the terms and the like are explained, and in the present specification, the components with the same names or the same reference numbers represent the similar or the same structures and are only used for illustrative purposes.

It should be noted that the axial direction in the present invention means the left-right direction in fig. 1, and the radial direction means the up-down direction in fig. 1, and in addition, in the actual use process of the tire, the stress is concentrated in a certain region, wherein the stress concentration region is the tire region with the size range of 14.0-40 mm along the radial vertical distance with the heel position as the starting point as the region between H3-H4 shown in fig. 1.

Referring to fig. 1, a tire with good rim of mouth durability, include the tire body ply 10 of turning back along the tire rim of mouth from the inboard outside of axialiy from the axis and set up the rim of mouth protection glue 20 in the tire body ply axial outside, still including setting up at the transition inoxidizing coating 30 of rim of mouth protection glue axialiy outside and along the tire bead 40 of transition inoxidizing coating axialiy inboard extension, the utility model discloses an increase one deck transition inoxidizing coating 30 in rim of mouth stress concentration region, the stress concentration region is passed through to the width of this transition inoxidizing coating 30, provides a buffer zone in stress concentration region when can strengthening the adhesion between tire body and rim of mouth protection glue to the rim of mouth of tire that will delay by a wide margin produces swell and delaminating probability, extension tire life.

Further, the radially topmost end of the bead 40 is disposed axially outside the transition protection layer 30 except the radially topmost end of the stress integration region, and the bottom end of the bead 40 extends along the transition protection layer 30, the bead filler 20 and the chafer 60 in sequence and terminates outside the chafer.

As a preferred embodiment of the present invention, the carcass ply 10 is formed with the main portion 110 and the turn-back portion 120 along the bead turn-back, and further, the present invention further includes the inner liner 50 disposed inside the carcass ply 10 and the chafer 60 extending from the inner side of the inner liner 50 to the turn-back portion 120 along the bead turn-back and located inside the bead 40.

Further, the radially lowermost end of the bead filler 20 and the axially outermost end of the chafer 60 are joined to the outer-side lowermost end of the turn-back portion.

As the utility model discloses preferred technical scheme, transition inoxidizing coating 30's radial bottommost sets up in the radial bottommost vertical top of rim of a mouth protection glue 20, the radial topmost position of transition inoxidizing coating is in the radial topmost vertical top of tire bead 40, promptly the radial topmost and radial bottommost branch of transition inoxidizing coating 30 arranges the radial both ends in stress concentration region in, and this transition inoxidizing coating thickness attenuate gradually along the radial both sides in stress concentration region, and transition inoxidizing coating is close to middle certain regional scope thickness thickest, and thickest size is 5.0mm, and this transition inoxidizing coating 30 is 1.5 ~ 5.0mm in the regional thickness scope of stress concentration to can strengthen the adhesion degree between tire matrix and rim of a mouth protection glue.

Further, the transition protection layer 30 is made of rubber and is the same as the carcass ply.

Further, the utility model provides a tire is still including setting up the side wall 70 in the rim of a river protection is glued 20 axial outsides, side wall bottom and the joint of tire bead 40 top.

As the utility model discloses preferred technical scheme, the side wall 70 axial outside still is equipped with rim protective layer 80, the rim protective layer is extended to the tire bead outside by the side wall outside, and is specific, as shown in fig. 1, the middle platform width of rim protective layer is K, and 2.0mm is less than or equal to K and is less than or equal to 8.0mm, and wherein, H1 scope is 18 ~ 30mm, and thickness H2 is between 2.5 ~ 5.5mm, and platform width K need be in stress concentration regional scope, through rim protective layer 80 and transition inoxidizing coating 30 combined action, further promotes the rim rigidity, finally reaches the durable effect of improving of rim.

Tire endurance tests were conducted using 185R14C gauge tires and 195/70R15C gauge tires, both of which included and excluded the design of the present application, wherein the test air pressure, test load, test speed, and temperature were as in table 1 below, and the test time at which delamination occurred was recorded.

Table 1: list of experimental parameters of endurance of 185R14C and 195/70R15C type tyres

Can know by above-mentioned tire durability experiment, adopt the utility model discloses a design, increase one deck transition inoxidizing coating in rim of a mouth stress concentration region promptly, can strengthen tire matrix and rim of a mouth protection and provide a buffer area in the stress concentration region when gluing the adhesion degree within a definite time, can obviously prolong the tire and take place the time of delaminating to can delay tire rim of a mouth by a wide margin and produce swell and delaminating probability, extension tire life.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims (9)

1. A tire with good seam allowance durability comprises a tire body ply (10) turning back from the inner side to the outer side along the periphery of a tire seam allowance and a seam allowance protective rubber (20) arranged on the axial outer side of the tire body ply, and is characterized by further comprising a transition protective layer (30) arranged on the axial outer side of the seam allowance protective rubber and a tire bead (40) extending from the axial outer side to the inner side of the transition protective layer.

2. A tire having good bead durability performance according to claim 1, wherein the carcass ply (10) is turned up along the bead circumference to form a main portion (110) and a turn-up portion (120).

3. A tire having good bead durability according to claim 1, further comprising an inner liner (50) provided inside the carcass ply (10) and a chafer (60) extending from the inner liner axially inward to the bottom end of the turn-up portion (120) along the bead periphery and inside the bead (40).

4. A tyre with good bead endurance performance according to claim 3, wherein the bead protection gum (20) has its radially lowermost end engaged with the axially outermost end of the chafer (60) at the outer lowermost end of the turn-up (120).

5. Tyre with good bead endurance according to claim 1, wherein the radially lowermost end of the transition protection layer (30) is arranged vertically above the radially lowermost end of the bead protection gum (20), and the radially uppermost end of the transition protection layer is located vertically above the radially uppermost end of the bead (40).

6. Tyre with good bead endurance according to claim 5, wherein the radially topmost end of the bead (40) is disposed axially outside the transition protection layer (30), and the bottom end of the bead (40) extends in succession along the transition protection layer (30), the bead protection gum (20) and the chafer (60) and ends outside the chafer.

7. A tyre with good bead endurance performance according to claim 6, further comprising sidewalls (70) disposed axially outside the bead protection compound (20), the bottom ends of said sidewalls engaging the top ends of the beads (40).

8. Tire with good bead endurance performance according to claim 7, wherein the sidewalls (70) are further provided with a rim protection layer (80) axially outside, extending from the sidewall outside to the bead outside.

9. A tire having good bead durability as in claim 8, wherein said rim protector has a mid-platform width K of 2.0mm K8.0 mm.

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