A tire for improving abrasion and braking performance

Abstract

This application relates to the field of tire manufacturing, and particularly to a tire with improved wear and braking performance. A tire with improved wear and braking performance, the tread of the tire is composed of a plurality of tread blocks, and grooves or knurling with a depth of 0.1 mm to 2 mm are provided on the tread blocks in the traveling direction; the grooves or knurling are enclosed within the tread blocks, and steel sheets with a depth of 0.2 mm to 5 mm are respectively provided on both sides of the grooves or knurling to isolate them from the main tread blocks. This tire reduces the barrel deformation generated on the non-contact side surfaces of the tire tread when it contacts the road surface, equalizes the contact pressure, improves the tire life, increases the frictional energy with the road surface, and contributes to safe operation.

Description

Technical Field

[0001] This application relates to the field of tire manufacturing, and particularly to a tire that improves wear and braking performance. Background Art

[0002] A tire is a part of a vehicle that contacts the road surface when the vehicle is moving. The part of the tire that contacts the road surface is called the tread. The tread is composed of a plurality of tread blocks. The tread blocks of a tire are non-compressible materials and can bear loads. According to Poisson's ratio, barreldeformation occurs on the non-contact side surfaces of the tread when it contacts the road surface. In addition, due to the difference in rigidity within the tread blocks, the contact pressures at the leading edge, trailing edge, and the central part of the contact surface with the road are different. Due to this barreldeformation, shear stress, and the difference in contact pressure within the contact surface with the road, a difference in frictional energy is generated. This difference in frictional energy causes different wear rates and becomes the reason for abnormal wear. If this abnormal wear intensifies, it will not only generate abnormal noise and a decline in the riding comfort, but also shorten the tire life. Summary of the Invention

[0003] To solve the above technical problems, the purpose of this application is to provide a tire that improves wear and braking performance. This tire reduces the barreldeformation that occurs on the non-contact side surfaces of the tread pattern when the tread contacts the road surface, equalizes the contact pressure, extends the tire life, increases the frictional energy with the road surface, and contributes to safe operation.

[0004] To achieve the above purpose, the following technical solutions are adopted in this application:

[0005] A tire that improves wear and braking performance, the tread of which is composed of a plurality of tread blocks. Grooves or knurls with a depth of 0.1 mm to 2 mm are provided on the tread blocks in the driving direction; the grooves or knurls are enclosed within the tread blocks, and steel sheets with a depth of 0.2 mm to 5 mm are respectively provided on both sides of the grooves or knurls to isolate them from the main tread blocks.

[0006] Preferably, the length of the grooves or knurls in the driving direction is 0.3 - 0.7 of the length of the tread blocks in the driving direction.

[0007] Preferably, the width of the grooves or knurls is 0.4 - 0.6 of the width of the tread blocks.

[0008] Preferably, the grooves or knurls are located in the interval of 0.2 - 0.8 of the length of the tread blocks in the driving direction. More preferably, the grooves or knurls are located in the interval from 1 / 4 to 3 / 4 of the length of the tread blocks in the driving direction.

[0009] Preferably, the width of the steel sheets is 0.5 - 1.0 mm.

[0010] Preferably, the depth of the steel sheet is 2-10 times the depth of the groove or knurl. More preferably, the depth of the groove or knurl is 0.3-1.0 mm; the depth of the steel sheet is 2-4 mm. Even more preferably, the depth of the groove or knurl is 0.4-0.6 mm; the depth of the steel sheet is 3.5-4.5 mm.

[0011] Preferably, the groove or knurl is located in the middle in both the driving direction and the width direction, and the distances from the edge of the tread block in the driving direction and the width direction are equal respectively.

[0012] In this application, to minimize the barrel deformation that occurs when the tread block contacts the road surface, a deformation absorption groove (groove or knurl) that can absorb the rubber volume deformed by the contact pressure is formed within the contact surface, minimizing the shear stress that occurs before and after the contact surface to the greatest extent. The vertical contact pressure of the tread block is proportional to the rigidity of the tread block. The rigidity of the tread block is lower in the vertical direction from the center position towards the edge, so the contact pressure at the center position is higher. By installing the barrel deformation absorption groove in the center part of the block in this application, the contact pressure within the tread block is made uniform, minimizing the displacement of the barrel deformation, reducing the shear stress, and thus improving the wear resistance and braking performance. Brief Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the barrel deformation displacement in Example 1. a is a schematic diagram of the tread pattern structure without adding grooves; b is a schematic diagram of the tread pattern structure with added grooves; c is a schematic diagram of the barrel deformation displacement.

[0014] Figure 2 It is a schematic diagram of the tread pattern structure without adding grooves in Example 2.

[0015] Figure 3 It is a schematic diagram of the tread pattern structure with added grooves in Example 2.

[0016] Figure 4 It is a schematic diagram of the tread pattern structure with added knurls in Example 3.

[0017] Figure 5 It is a shear force diagram showing the shear forces generated at the heel and toe parts of the tread block at the leading edge and trailing edge of contact when contacting the ground. Detailed Description of the Embodiments

[0018] The following provides a detailed description of the specific embodiments of this application in conjunction with the drawings.

[0019] Example 1

[0020] As Figure 1As shown in Figure (b), a groove 2 with a depth of 0.5 mm is provided on the tread block 1 in the traveling direction. The groove 2 is located within the range of 1 / 4 to 3 / 4 of the length of the tread block in the traveling direction, and the length is 0.5 times the length in the traveling direction; relative to Figure 1 Figure (a), there is no groove 2. In Figure 1 Figure (c), there is a barrel-shaped displacement, Figure 1 (b) shows that the barrel-shaped displacement is reduced.

[0021] Example 2

[0022] As Figure 2 shown, it is the tread pattern of a car tire with a circumference of 1.8 m (a). When using 60 pitches, the tread block 1 of one pitch is shown. As Figure 3 shown in the car tire tread pattern (b), a groove 2 with a depth of 0.5 mm is provided on the tread block 1 in the traveling direction. The groove 2 is located within the range of 1 / 4 to 3 / 4 of the length of the tread block 1 in the traveling direction, and the length is 0.5 times the length in the traveling direction; the groove 2 is enclosed within the tread block 1, and steel sheets with a depth of 4 mm are respectively provided on both sides of the groove 2 to isolate from the main tread block 1. The width of the tread block 1 is 30 mm, the distance between the groove 2 and the edge of the tread block 1 in the width direction is 8 mm, and the width of the steel sheet is 0.7 mm.

[0023] Example 3

[0024] As Figure 4 shown in the car tire tread pattern (c), knurling 4 is provided on the tread block 1 in the traveling direction. The knurling 4 is composed of multiple grooves with a depth of 0.5 mm and a width of 0.5 mm at intervals. The knurling 4 is located within the range of 1 / 4 to 3 / 4 of the length of the tread block 1 in the traveling direction, and the length is 0.5 times the length in the traveling direction; the knurling 4 is enclosed within the tread block 1, and steel sheets with a depth of 4 mm are respectively provided on both sides of the knurling 4 to isolate from the main tread block 1. The width of the tread block 1 is 30 mm, the distance between the knurling 4 and the edge of the tread block 1 in the width direction is 8 mm, and the width of the steel sheet is 0.7 mm.

[0025] Example 4

[0026] For the car tire tread pattern, a groove 2 with a depth of 1 mm is provided on the tread block 1 in the traveling direction. The groove 2 is located within the range of 1 / 4 to 3 / 4 of the length of the tread block 1 in the traveling direction, and the length is 0.5 times the length in the traveling direction; the groove 2 is enclosed within the tread block 1, and steel sheets with a depth of 4 mm are respectively provided on both sides of the groove 2 to isolate from the main tread block 1. The width of the tread block 1 is 30 mm, the distance between the groove 2 and the edge of the tread block 1 in the width direction is 8 mm, and the width of the steel sheet is 0.7 mm.

[0027] Figure 5It is to test the shear forces generated at the heel and toe portions of the tread block 1 at the leading edge and trailing edge of grounding when grounded. In the passenger car tire b of Embodiment 2 and the passenger car tire c of Embodiment 3 where the barrel-shaped deformation absorption grooves are installed, the shear forces are smaller than those of the passenger car tire a.

[0028] The above is the description of the embodiments of the present application. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel points disclosed herein.

Claims

1. A tire with improved abrasion and braking performance, the tread of the tire is composed of a plurality of tread blocks (1), characterized in that, On the tread block (1) in the driving direction, there are grooves (2) or knurling (4) with a depth of 0.1 mm to 2 mm; the grooves (2) or knurling (4) are enclosed within the tread block (1), and on both sides of the grooves (2) or knurling (4), there are steel sheets (3) with a depth of 0.2 mm to 5 mm, and the steel sheets (3) isolate the grooves (2) or knurling (4) from the main body of the tread block (1); the length of the grooves (2) or knurling (4) in the driving direction is 0.3 - 0.7 times the length of the tread block (1) in the driving direction; the grooves (2) or knurling (4) are located in the middle both in the driving direction and the width direction, and the distances from the edges of the tread block (1) in the driving direction and the width direction are respectively equal.

2. A tire for improving wear and braking performance according to claim 1, characterized in that, The width of the grooves (2) or knurling (4) is 0.4 - 0.6 times the width of the tread block (1).

3. A tire for improving abrasion and braking performance according to claim 1, characterized in that, The width of the steel sheet (3) is 0.5 - 1.0 mm.

4. A tire for improving wear and braking performance according to claim 1, characterized in that, The depth of the steel sheet (3) is 2 - 10 times the depth of the grooves (2) or knurling (4).

5. A tire for improving wear and braking performance according to claim 1, characterized in that, The depth of the grooves (2) or knurling (4) is 0.3 - 1.0 mm; the depth of the steel sheet (3) is 2 - 4 mm.

6. A tire for improving wear and braking performance according to claim 1, wherein, The depth of the grooves (2) or knurling (4) is 0.4 - 0.6 mm; the depth of the steel sheet (3) is 3.5 - 4.5 mm.

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