CN112092545A - Engineering machinery radial tire with special crown design - Google Patents

Abstract

The invention discloses an engineering machinery radial tire with a special crown design, which sequentially comprises a tire tread, a belted layer group, cushion rubber, a tire body and an inner liner layer from outside to inside, wherein a transition belted layer is arranged between the tire body and the belted layer group, the inner liner layer is provided with a thickening area at a tire shoulder part, and the belted layer group sequentially comprises a first belted layer, a second belted layer, a third belted layer and a fourth belted layer from inside to outside. Compared with the prior art, the tire tread stress is improved, the rigidity of the tread is improved, the deformation of tire pattern blocks under the stress condition is reduced, the tread stress is effectively dispersed, and the problems of groove cracking, shoulder internal cracking and the like caused by stress concentration are avoided by adding the transition cord with the angle bound to the tire shoulder and optimizing the inner liner rubber material at the tire shoulder.

Description

Engineering machinery radial tire with special crown design

Technical Field

The invention relates to the technical field of tires, in particular to an engineering machinery radial tire with a special crown design.

Background

Radial tires are pneumatic tires in which the cords from one bead to the other of the carcass plies are aligned at an angle of substantially 90 ° to the centerline of the tread. The radial tire is mainly characterized in that a belt ply is a main stress component, the belt ply and carcass cords are arranged at a large angle (70-80), and the carcass cords and the belt ply cords are crossed from three directions to form a plurality of triangular mesh structures. Thus, the crown stiffness is higher than that of a bias tire, the ply ratio is less than that of a bias tire, and the sidewalls are softer and lighter than a bias tire. The radial tire is more wear-resistant and oil-saving than a bias tire, has the characteristics of good buffer performance, high speed performance and the like, is a name of a tire product, is mainly defined from the structure of the tire product, and can be divided into a semi-steel radial tire and an all-steel radial tire in a broad sense.

The existing tire crown structure (figure 1) comprises a tire tread 1, cushion rubber 2, an inner liner 4, a first belt ply 5, a second belt ply 6, a third belt ply 7, a fourth belt ply 8 and a tire body 3. The angle of the first belt layer 5 is usually 30-40 degrees, and the first belt layer mainly plays a role in transition from a tire body to the belt layer; the second belt layer 6 and the third belt layer 7 are working layers, and the angle is usually 15-25 degrees; the fourth belt layer 8 is a protective layer, and the angle is usually 10-15 degrees; the lining layer 4 is composed of two layers of airtight layer films and 2 layers of transition layer films.

The existing crown structure has the advantages of oil saving, high bearing capacity, high impact resistance and the like, but in the actual use process, some deepened patterns are applied to the structure, and due to the fact that the pattern depth is deeper and the pattern block distance is large, when the tire load is increased in the use process, adjacent pattern blocks contacting the ground can be repeatedly rubbed and extruded, so that after the tire is used for a period of time, the bottom of a pattern groove is subjected to fatigue crack due to repeated flex, and the groove crack, the shoulder in the tire and other quality problems occur; seriously affecting the service life of the tire. Meanwhile, in the production process, the problem of thread exposure in the tire is easy to occur due to the fluctuation of the process and the components.

Disclosure of Invention

The present invention aims to provide an off-the-shelf radial tire with a special crown design to solve the problems set forth in the background above.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an engineering machine tool radial tire with special crown design, includes tread, belted layer group, packing, matrix and inner liner by outer to interior in proper order, the matrix is equipped with transition belted layer with belted layer between group to the inner liner is equipped with the bodiness region in tire shoulder position.

As a further scheme of the invention: the thickening of the thickened region is 10 mm.

As a further scheme of the invention: the transition belted layer is a steel wire belted layer with a large angle of 40-60 degrees and is divided into two pieces which are added to the shoulder part of the tire crown.

As a further scheme of the invention: the belt bundle layer group sequentially comprises a first belt bundle layer, a second belt bundle layer, a third belt bundle layer and a fourth belt bundle layer from inside to outside.

As a further scheme of the invention: the difference between the transition belted layer and the edge of the first belted layer is 30-50 mm.

As a further scheme of the invention: the inner liner layer is composed of two layers of transition layer rubber sheets, two layers of air-tight layer rubber sheets and a piece of molding compound.

As a still further scheme of the invention: the angle of the first belt layer is 25-30 degrees; the angle of the second belt layer is 18-26 degrees; the angle of the third belt layer is 18-26 degrees; the angle of the fourth belt layer is 15-26 degrees.

As a still further scheme of the invention: the first belt ply is wider than the transition belt ply, and the difference level of the two sides is 30-50 mm; the second belt ply is narrower than the first belt ply, and the difference between the two sides is 70-85 mm; the third belt ply is narrower than the second belt ply, and the difference between the two sides is 40-55 mm; the fourth belt ply is wider than the second belt ply, the third belt ply and the transition belt ply, is narrower than the first belt ply, and has a difference grade of 25-30mm with the first belt ply.

Compared with the prior art, the invention has the beneficial effects that: the invention relates to a special crown design, which improves the rigidity of a tire crown by optimally designing a skeleton material and a sizing material at the position of the tire crown. Compared with the prior art, the stress of the tire crown of the tire is improved, the rigidity of the tire crown is improved, the deformation of tire pattern blocks under the stress condition is reduced, the stress of the tire crown is effectively dispersed, and the problems of groove cracking, shoulder internal cracking and the like caused by stress concentration are avoided by adding a layer of transition cord with an angle bound to the tire shoulder part and optimizing an inner lining rubber material at the tire shoulder part; and meanwhile, the rubber material of the inner liner is thickened at the tire shoulder part, so that the problem of thread exposure in the tire is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic structural view of the inner liner layer in the present invention.

Wherein: the tire comprises a tire tread 1, cushion rubber 2, a tire body 3, an inner liner 4, a first belt ply 5, a second belt ply 6, a third belt ply 7, a fourth belt ply 8, a transition belt ply 9, a transition layer rubber sheet 10, an air-tight layer rubber sheet 11 and molding rubber 12.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, in the embodiment of the present invention, an engineering machine radial tire with a special crown design is composed of a tread 1, a cushion rubber 2, a carcass 3, an inner liner 4, a first belt 5, a second belt 6, a third belt 7, a fourth belt 8, and a transition belt 9, wherein a large angle of 40-60 ° transition belt 9 is added between the carcass 3 and the first belt 5, and the thickness of the inner liner 4 at a shoulder portion is increased by a 10mm shadow portion.

The transition belt ply 9 is a steel wire belt ply with a large angle of 40-60 degrees, is divided into two steel wire belt plies which are added on the shoulder part of a tire crown, and has a difference grade of 30-50mm from the edge part of the first belt ply 5.

The inner liner layer 4 is shown in fig. 3 and is composed of two transition layer rubber sheets 10, two air-tight layer rubber sheets 11 and a piece of molding compound 12. The thickness of the tire shoulder part of the semi-finished product inner lining layer is increased by 10mm, and the thickness of the tire shoulder part of the finished product tire is increased by 5mm, namely the shaded part of figure 2.

The angle of each of the four belt layers is 25-30 degrees for the first belt layer 5; the angle of the second belt layer 6 is 18-26 degrees; the angle of the third belt layer 7 is 18-26 degrees; the angle of the fourth belt layer 8 is 15-26 degrees; the specific angle is adjusted according to the specification of the tire and the requirement on the size of the tire. Wherein the first belt ply 5 is wider than the transition belt ply 9, and the difference grade of the two sides is 30-50 mm; the second belt ply 6 is narrower than the first belt ply 5, and the difference between the two sides is 70-85 mm; the third belt ply 7 is narrower than the second belt ply 6, and the difference between the two sides is 40-55 mm; the fourth belt ply 8 is wider than the second belt ply 6, the third belt ply 7 and the transition belt ply 9, is narrower than the first belt ply 5, and has a difference of 25-30mm from the first belt ply 5.

The key point of the proposal of the application lies in that a layer of large-angle transition layer is directly added on the tire body and the belted layer, and the thickness of the inner liner layer at the tire shoulder part is thickened.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. The utility model provides an engineering machine tool radial tire with special crown design, includes tread (1), belted layer group, fills up and glues (2), matrix (3) and inner liner (4) by outer to interior in proper order, its characterized in that, be equipped with transition belted layer (9) between matrix (3) and the belted layer group to inner liner (4) are equipped with the bodiness region in the tire shoulder position.

2. An off-the-road radial tire with a special crown design as claimed in claim 1, wherein the thickened area is 10mm thick.

3. An off-the-road radial tire with special crown design according to claim 1, characterized in that the transition belt (9) is a steel belt with a large angle of 40-60 ° split into two pieces applied to the crown shoulder.

4. An off-the-road radial tire with a special crown design according to claim 1, characterized in that the belt package comprises, in order from inside to outside, a first belt (5), a second belt (6), a third belt (7) and a fourth belt (8).

5. An off-the-road radial tire with special crown design according to claim 4, characterized in that the transition belt (9) is on the order of 30-50mm from the edge of the first belt (5).

6. An off-the-road radial tire with a special crown design according to claim 1, characterized in that said inner liner (4) consists of two transition layer rubber sheets (10), two air-tight layer rubber sheets (11) and one piece of molding compound (12).

7. An off-the-road radial tire with special crown design according to claim 4, characterized in that the belt number one (5) angle is 25-30 °; the angle of the second belt layer (6) is 18-26 degrees; the angle of the third belt layer (7) is 18-26 degrees; the angle of the fourth belt layer (8) is 15-26 degrees.

8. An off-the-road radial tire with special crown design according to claim 7, characterized in that said belt number one (5) is wider than the transition belt (9) by a step of 30-50 mm; the second belt ply (6) is narrower than the first belt ply (5), and the difference between the two sides is 70-85 mm; the third belt ply (7) is narrower than the second belt ply (6), and the difference between the two sides is 40-55 mm; the fourth belt ply (8) is wider than the second belt ply (6), the third belt ply (7) and the transition belt ply (9) and narrower than the first belt ply (5), and the difference between the fourth belt ply and the first belt ply (5) is 25-30 mm.

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