CN114801592A

CN114801592A - Heavy-duty tire

Info

Publication number: CN114801592A
Application number: CN202210547293.XA
Authority: CN
Inventors: 林伯翰; 赖硕甫
Original assignee: Cheng Shin Tire and Rubber China Co Ltd
Current assignee: Cheng Shin Tire and Rubber China Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-07-29
Anticipated expiration: 2042-05-19
Also published as: CN114801592B

Abstract

The invention discloses a truck tire, which comprises a rubber material structure and a steel wire ring belt arranged in the rubber material structure, wherein the steel wire ring belt comprises a first steel wire ring belt layer, a second steel wire ring belt layer and a third steel wire ring belt layer which are sequentially distributed from inside to outside, the third steel wire ring belt layer is of a split structure and comprises first symmetrical structures symmetrically arranged at two sides of a tread center line, and steel wire lines in the first symmetrical structures at the two sides are symmetrical relative to the tread center line. According to the invention, the third steel wire belt structure is improved, so that the shearing force applied to the first symmetrical structure is reduced, the rubber materials close to the central end point and the tire shoulder end point of the first symmetrical structure bear the shearing force, the shearing force is dispersed at the tire shoulder and the center, the separation of the rubber materials and the third steel wire belt caused by heating is effectively improved, the damage risk of the tire is further reduced, and the high-speed running performance of the tire is improved.

Description

Heavy-duty tire

Technical Field

The invention relates to a heavy-duty tire, in particular to adjustment of a steel wire belt layer structure.

Background

When a heavy-duty vehicle runs at a high speed, sudden tire burst is a very dangerous thing, so that a vicious accident of vehicle damage and death often occurs, and how to improve the safety of the vehicle running at a high speed still remains a technical problem to be solved by technical personnel in the field.

Disclosure of Invention

The invention aims to provide a heavy duty tire which can effectively improve the high-speed performance of a transverse groove pattern and ensure the safety of a vehicle at high speed.

Another object of the present invention is to provide a heavy duty tire that reduces tire failure due to sudden tire temperature rise during high speed running of a vehicle under high load.

In order to solve the technical problem, the invention provides a heavy-duty tire which comprises a rubber material structure and a steel wire ring belt arranged in the rubber material structure, wherein the steel wire ring belt comprises a first steel wire ring belt layer, a second steel wire ring belt layer and a third steel wire ring belt layer which are sequentially distributed from inside to outside, the third steel wire ring belt layer is of a split structure and comprises first symmetrical structures symmetrically arranged on two sides of a tread center line, and steel wire lines in the first symmetrical structures on the two sides are symmetrical about the tread center line.

According to carrying out high speed performance test to prior art heavy-duty tire, can discover that most tire failure modes under high speed are caused by steel band 2, 3 layers of both ends sizing material and steel band separation, specifically, 2, 3 layers of steel band are the tire working layer among the prior art, and the relative tread central line of angle of steel wire line, the former inclines to the left, the latter inclines to the right for steel band 2, 3 layers of tail end sizing material receive great shearing force, steel band 2, 3 layers of tail end are located the tire shoulder thick department simultaneously, when the tire rolls, the tire shoulder deflection is big, and it is fast to heat up, lead to steel band 2, 3 layers of tail end sizing material and steel wire separation, finally lead to tire tread blasting.

Based on the structure, the third steel wire ring belt layer is improved in the heavy-duty tire, the third steel wire ring belt layer is of a split structure in the tire transverse direction, the split structure is called as a first symmetrical structure, the extending directions of the steel wires in the first symmetrical structures on two sides are symmetrical relative to the center line of the tire surface, so that the shearing force applied to rubber materials at two ends of the first symmetrical structure is greatly reduced compared with the prior art, the rubber materials close to the center end point of the first symmetrical structure and the tire shoulder end point bear the shearing force, the shearing force is not concentrated on the tire shoulder, the rubber materials are prevented from being separated from the steel wire ring belt, the damage risk of the tire is reduced, and the high-speed performance of the tire is improved.

Optionally, the steel wire ring belt further includes a fourth steel wire ring belt layer, the fourth steel wire ring belt layer is a split structure and includes second symmetric structures symmetrically disposed on two sides of the tread center line, the second symmetric structures are correspondingly distributed on the radial outer side of the first symmetric structure, the width of the second symmetric structure is smaller than that of the first symmetric structure, and the second symmetric structure is consistent with the extending direction of the steel wire corresponding to the first symmetric structure.

Optionally, the rubber structure forms a tread portion at the radial outer side of the fourth wire belt layer, the tread portion is in a transverse groove structure, a first main groove and a second main groove extending along the circumferential direction are further arranged at two sides of the tread center line, the first main groove is close to the tread center line, and the transverse groove extends from the tread center to a tire shoulder portion to form a first central pattern block, a second central pattern block and a tire shoulder pattern block;

and a tire shoulder groove is formed in the outer side of the tire shoulder pattern block, and the end part of the second steel wire ring belt layer extends to the radial inner end of the tire shoulder groove.

Optionally, said first main groove comprises a first groove segment and a second groove segment both communicating with the same said transverse groove, the inner end of said first symmetrical structure being located radially between said first and second groove segments.

Optionally, in the first symmetric structure and the second symmetric structure, the inner end of the former is located in the area of the first central block in the radial direction, the inner end of the latter is located in the area of the second central block in the radial direction, and the outer ends of the former and the second symmetric structure are both located in the area of the shoulder block in the radial direction.

Optionally, an included angle between the extending direction of the steel wire line and the tread center line in the first symmetric structure is α, and a value range of α is as follows: 18 < alpha < 53.

Optionally, the second wire belt layer is inclined radially inward from a midpoint of the second wire belt layer to an end of the second wire belt layer by an inclination angle θ 1, and the tread portion is inclined radially inward from a center of the tread portion to an end of the tread portion by an inclination angle θ 2, θ 1> θ 2.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a wire loop strip in a heavy duty tire according to the present invention;

FIG. 2 is a radial cross-sectional view of a truck tire provided in accordance with the present invention;

FIG. 3 is a tread pattern appearance of a truck tire provided by the present invention;

FIG. 4 is a schematic structural view of FIG. 2 to the left of the tread centerline;

FIG. 5 is a schematic structural view of FIG. 2 to the right of the tread centerline;

FIG. 6 is a schematic structural view of FIG. 3 to the left of the tread centerline;

FIG. 7 is a schematic structural view of FIG. 3 to the right of the tread centerline;

wherein the reference numerals in fig. 1-7 are explained as follows:

11-a tread portion; 11 a-transverse grooves; 11 b-a first main trench; b 1-first channel segment; b 2-second trench section; 11 c-a second main groove; 12 a-shoulder grooves; b1 — first center block; b2-second center block; b3-shoulder blocks;

21-a first steel wire hoop layer;

22-a second steel wire belt layer;

23-a third steel wire hoop layer; 23 a-a first symmetric structure;

24-a fourth steel wire hoop layer; 24 a-a second symmetric structure;

l-tread centerline.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function and do not denote any particular limitation in order and/or importance.

Herein, in the radial direction of the tire, the side close to the tread pattern is the "outer side".

Herein, in the width direction of the tire, the direction close to the middle of the tire is "inner", and the direction away from the middle of the tire is "outer".

Referring to fig. 1, the invention provides a heavy-duty tire, which includes a rubber structure and a steel wire ring belt arranged inside the rubber structure, the steel wire ring belt includes a first steel wire ring belt layer 21, a second steel wire ring belt layer 22 and a third steel wire ring belt layer 23 which are sequentially distributed from inside to outside, wherein the third steel wire ring belt layer 23 is a split structure and includes two first symmetric structures 23a, the first symmetric structures 23a are symmetrically distributed on two sides of a tread center line l, and steel wires in the two first symmetric structures 23a are symmetrical with respect to the tread center line l.

Based on the structure, the third steel wire ring belt layer 23 is improved by the heavy-duty tire, the third steel wire ring belt layer 23 is of a split structure in the tire transverse direction, the steel wires in the first symmetrical structures 23a on two sides are symmetrical relative to the tread center line l, so that the shearing force applied to rubber materials at two ends of the first symmetrical structures 23a is greatly reduced compared with the prior art, the first symmetrical structures 23a are close to the center end point, the rubber materials close to the tire shoulder end point bear the shearing force, the shearing force is not concentrated at the tire shoulder, the rubber materials are prevented from being separated from the steel wire ring belt, the tire damage risk is reduced, and the high-speed performance of the tire is improved.

Further, the steel wire ring belt further comprises a fourth steel wire ring belt layer 24, the fourth steel wire ring belt layer 24 is also a split structure and comprises two second symmetric structures 24a, the two second symmetric structures 24a are symmetrically arranged on two sides of the tread center line l and correspondingly distributed on the radial outer side of the first symmetric structure 23a, the width of the second symmetric structure 24a is smaller than that of the first symmetric structure 23a, and the extending direction of the steel wire in the second symmetric structure 24a is consistent with that of the steel wire in the corresponding first symmetric structure 23 a.

In this embodiment, the number of the second symmetric structures 24a and the number of the first symmetric structures 23a are two, and are distributed on both sides of the tread centerline l. It is understood that the number of the second symmetric structures 24a and the first symmetric structures 23a is not limited, and may be two or more, as long as the two or more are symmetrically distributed about the tread center line l.

Referring to fig. 2-3, in the present invention, the rubber structure forms a tread portion 11 at the radial outer side of the fourth belt layer 24, the tread portion 11 is a transversal groove structure, a first main groove 11B and a second main groove 11c extending along the circumferential direction are further provided at both sides of the tread center line l, the first main groove 11B is close to the tread center line l, the transversal groove 11a extends from the tread center to the shoulder portion to form a first center block B1, a second center block B2, and a shoulder block B3,

a shoulder groove 12a is provided outside the shoulder block B3, and an end of the second steel belt layer 22 extends to a radially inner end of the shoulder groove 12 a.

As set forth above, the thickness of the end portion of the second wire belt layer 22 corresponding to the rubber structure is small, the heat dissipation performance is good, and the high-speed performance of the truck tire is further improved.

As will be understood with reference to fig. 3 and 4, the first main groove 11b comprises a first groove segment b1 and a second groove segment b2, which are located on either side of the same transverse groove 11a and communicate with the same transverse groove 11a, the inner end of the first symmetrical structure 23a being located radially between the first groove segment b1 and the second groove segment b 2.

The above arrangement is only exemplary, and in practical applications, the position of the inner end of the first symmetric structure 23a is not limited, and is possible to be located inside the first trench section b1 or outside the second trench section b 2.

As shown in fig. 3 and 5, in the first symmetric structure 23a and the second symmetric structure 24a, the inner end is located in the area of the first center block B1 in the radial direction, the inner end is located in the area of the second center block B2 in the radial direction, and the outer ends are located in the area of the shoulder block B3 in the radial direction.

In order to prevent the crack from being formed at the thinnest part of the rubber material and damaging the tread portion 11 after the steel wires are separated from the rubber material, the first symmetrical structure 23a and the second symmetrical structure 24a are arranged as above to avoid the second main groove 11c, so that the tread portion 11 is ensured to have sufficient thickness at the corresponding positions of the end parts of the first symmetrical structure 23a and the second symmetrical structure 24 a.

With continued reference to fig. 3, fig. 6 and fig. 7, in the present invention, an included angle between the extending direction of the steel wire line in the first symmetric structure 23a and the tread center line l is α, and a value range of α is: 18 < alpha < 53.

Further, as will be understood from fig. 5, the second wire belt layer 22 is inclined radially inward from the midpoint of the second wire belt layer 22 to the end of the second wire belt layer 22 by an inclination angle θ 1, and the tread portion 11 is also inclined radially inward from the midpoint of the tread portion 11 to the end of the tread portion 11 by an inclination angle θ 2, θ 1> θ 2.

Because the tread part 11 is inevitably extruded by the ground direction in the driving process, the arrangement can effectively reduce the strain of the end point edge and reduce the opportunity of separating the steel belt from the sizing material.

The truck tire provided by the present invention is described in detail, and the principle and the embodiment of the present invention are explained herein by using specific examples, and the above description of the examples is only used to help understanding the method and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A heavy-duty tire comprises a rubber material structure and a steel wire ring belt arranged in the rubber material structure, wherein the steel wire ring belt comprises a first steel wire ring belt layer (21), a second steel wire ring belt layer (22) and a third steel wire ring belt layer (23) which are sequentially distributed from inside to outside,

the third steel wire belt layer (23) is of a split structure and comprises first symmetrical structures (23a) symmetrically arranged on two sides of a tread center line (l), and steel wire lines in the first symmetrical structures (23a) on the two sides are symmetrical relative to the tread center line (l).

2. The heavy-duty tire according to claim 1, wherein the wire belt further comprises a fourth wire belt layer (24), the fourth wire belt layer (24) is a split structure and comprises second symmetrical structures (24a) symmetrically arranged on both sides of the tread centerline (l), the second symmetrical structures (24a) are correspondingly distributed on the radial outer side of the first symmetrical structures (23a), the width of the second symmetrical structures (24a) is smaller than that of the first symmetrical structures (23a), and the second symmetrical structures (24a) are consistent with the extending direction of the wire corresponding to the first symmetrical structures (23 a).

3. The heavy-duty tire according to claim 2, wherein the rubber structure forms a tread portion (11) radially outside the fourth wire belt layer (24), the tread portion (11) is of a lug groove configuration, a first main groove (11B) and a second main groove (11c) extending in a circumferential direction are further provided on both sides of the tread centerline (l), the first main groove (11B) is close to the tread centerline (l), and the lug grooves (11a) extend from a tread center to a shoulder portion to form a first center block (B1), a second center block (B2), and a shoulder block (B3).

A shoulder groove (12a) is formed in the outer side of the shoulder block (B2), and the end of the second steel wire hoop layer (22) extends to the radial inner end of the shoulder groove (12 a).

4. A heavy-duty tyre according to claim 3, characterized in that said first main groove (11b) comprises a first groove segment (b1) and a second groove segment (b2) communicating with the same transverse groove (11a), the inner end of said first symmetrical structure (23a) being radially located between said first groove segment (b1) and second groove segment (b 2).

5. A heavy-duty tire according to claim 3, wherein the first symmetrical structure (23a) and the second symmetrical structure (24a) have an inner end located radially within the range of the region of the first center block (B1) and an inner end located radially within the range of the region of the second center block (B2), and both outer ends located radially within the range of the region of the shoulder block (B3).

6. A heavy-duty tyre as claimed in claim 2, characterized in that said first symmetrical structure (23a) has an angle α between the direction of extension of said steel wire and said tread centre line (i), α being in the range: 18 < alpha < 53.

7. The heavy-duty tire according to any one of claims 1 to 6, wherein said second wire belt layer (22) is inclined radially inward by an inclination angle θ 1 from a midpoint of said second wire belt layer (22) to an end point of said second wire belt layer (22), and said tread portion (11) is inclined radially inward by an inclination angle θ 2 from a midpoint of said tread portion (11) to an end point of said tread portion (11), θ 1> θ 2.