A studless tire pattern suitable for both summer and winter roads, ideal for icy and snowy conditions.

Abstract

The objective is to provide a studless tire pattern suitable for both summer and winter use on icy and snowy roads. [Solution] The present invention provides a summer / winter all-season studless tire pattern suitable for icy and snowy roads, primarily for use in truck and bus fleets in areas with long snowy seasons, especially for radial tires, prioritizing the requirements for braking performance and handling stability on icy and snowy roads in winter, while also considering wear resistance requirements in summer, thus avoiding the hassle of tire changes.

Description

Technical Field

[0004]

[0001] The present invention relates to a snow tire pattern, and more particularly to an all-season studless tire pattern suitable for ice and snow roads.

Background Art

[0002] Japan has a long and narrow terrain running from north to south, and the ice and snow environment lasts for 5 months. Japan's territory is long and narrow, and the ice and snow environment lasts for 5 months. Current snow tire products can meet the braking performance requirements in winter, but cannot meet the wear resistance requirements in summer. Tire replacement work is cumbersome and consumes human and material resources. Generally, tires used on snow roads are required to have grip and handling stability on ice and snow roads for studless tires, and tires used in summer are required to have wet grip performance, handling stability, and wear resistance of summer tires, etc. Different performances are required according to the tire life cycle, so they have faced cumbersome tire replacement work.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The wear indicators are positioned along the circumference of the corresponding groove, dividing it into six equal sections.

[0006] The variable-angle lateral groove has a symmetrical structure, and from the fifth groove to the tire sidewall, the edges on one side of the groove wall are in the order of first horizontal line, first fold line, second horizontal line, second fold line, third horizontal line, and third fold line. The first horizontal line, first fold line, second horizontal line, and second fold line are located in the fifth block-type pattern, and from the fifth groove to the tire sidewall, the width of the variable-angle lateral groove widens, and the third fold line gradually narrows the width of the variable-angle lateral groove. The vertical slit is located in the center of the fifth block-shaped pattern, and the vertical slit is connected to the position of the second horizontal line of the variable-angle transverse groove. In the sections corresponding to the third horizontal line and third fold line of the variable-angle transverse groove, the horizontal transverse groove is connected to the symmetrical groove, and the width of the symmetrical groove gradually narrows.

[0007] On both sides of the first, second, third, and fourth block-shaped patterns, there is a wide groove on one side and a narrow groove on the other, and the first, second, and third transverse slits on each block-shaped pattern are angled in the same direction. Regarding the first block-type pattern, the second block-type pattern, and the third block-type pattern, if the first transverse slit is installed at an angle from top to bottom from a wide groove to a narrow groove, the portion of the block-type pattern where the upper fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. If the first transverse slit is installed at an angle from bottom to top from a wide groove to a narrow groove, the portion of the block-type pattern where the lower fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. The third block-shaped pattern, the first transverse slit on the fourth block-shaped pattern, and the second transverse slit on the fourth block-shaped pattern divide the block-shaped pattern, and the resulting block-shaped pattern portions extend toward the wide groove, forming protrusions toward the wide groove, and the corners of the block-shaped pattern formed between the first transverse slit and the wide groove are chamfered.

[0008] In the first and second block patterns, the edges near the wide grooves are curved, while the edges near the narrow grooves are polylines. In the third block-type pattern, the edges near the wide grooves are polylines, and the edges near the narrow grooves are polylines. In the fourth block-type pattern, the edges near the wide grooves are polylines, while the edges near the narrow grooves are straight lines.

[0009] In the left-side pattern, the first block-shaped pattern extends from the wide groove to the narrow groove, with the first transverse slit positioned diagonally from top to bottom, and the portion of the block-shaped pattern where the upper fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. In the second block-shaped pattern of the left-side pattern, the first horizontal slit is positioned diagonally from top to bottom, extending from the wide groove to the narrow groove, and the portion of the block-shaped pattern where the upper fourth horizontal slit is located extends into the narrow groove, forming a projection toward the narrow groove. In the left-side pattern, the third block-shaped pattern has a first transverse slit positioned diagonally from bottom to top, extending from the wide groove to the narrow groove, and the portion of the block-shaped pattern where the lower fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. In the left-side pattern, the fourth block-shaped pattern has a first transverse slit positioned diagonally from bottom to top, extending from the wide groove to the narrow groove. The portion of the block-shaped pattern where the lower fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove.

[0010] In the cross-sectional view, the widthwise edges of the first, second, third, and fourth block-shaped patterns are angled in the same direction as the first horizontal slit.

[0011] In the cross-sectional view, the widthwise edges of the first, second, third, and fourth block-shaped patterns have the same inclination angle as the first horizontal slit, and the inclination angles of the first, second, and third horizontal slits are also the same.

[0012] The tread pattern is symmetrical with respect to the center, and the saturation level of the tread pattern is 67-73%. [Effects of the Invention]

[0013] The all-season studless tire pattern suitable for icy and snowy roads provided by this invention is primarily used in truck and bus fleets. It prioritizes meeting the requirements for braking performance and handling stability on icy and snowy roads in winter, while also considering wear resistance requirements in summer, thus avoiding the hassle of tire changes. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic diagram of the present invention. [Figure 2] These are schematic diagrams of the first, second, third, fourth, and fifth block-type patterns. [Figure 3] This is a schematic cross-sectional view of the steel billet forming the second transverse slit. [Figure 4] This is a schematic cross-sectional view of the steel billet forming the first transverse slit. [Figure 5] This is a schematic cross-sectional view of the steel billet forming the third transverse slit. [Figure 6] This is a schematic cross-sectional view of a steel billet forming horizontal sipes and vertical slits. [Figure 7] These are schematic cross-sectional views of the second and fourth grooves. [Figure 8] Schematic cross-sectional views of the first groove, the third groove, and the fifth groove [Figure 9] Schematic diagram of the tread pattern surface when starting to be used in summer after wear of the present invention **Embodiments for Carrying Out the Invention**

[0015] Hereinafter, the technical means of the present invention will be clearly and completely described while referring to the accompanying drawings and specific examples. The preferred embodiments described in this specification are only used to illustrate and interpret the present invention, and should not be construed as a limitation to the protection scope of the present invention. It should be understood that those skilled in the art can make some non-essential improvements and adjustments based on the content of the present invention described below. In the present invention, unless otherwise specified and limited, all technical terms used in this application have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs.

[0016] As shown in FIGS. 1 to 9, a summer and winter studless tire pattern suitable for ice and snow roads, comprising a block-type pattern arranged along the circumferential direction of the tire and a groove arranged along the circumferential direction of the tire. The center of the tire width is the first groove 1, and from the first groove 1 to the left and right in sequence are the first block-type pattern 6, the second groove 2, the second block-type pattern 7, the third groove 3, the third block-type pattern 8, the fourth groove 4, the fourth block-type pattern 9, the fifth groove 5, and the fifth block-type pattern 10. The widths of the first groove 1, the third groove 3, and the fifth groove 5 are smaller than the widths of the second groove 2 and the fourth groove 4. For the first block-type pattern 6, the second block-type pattern 7, the third block-type pattern 8, and the fourth block-type pattern 9, the adjacent block-type patterns in the same circumferential direction are connected by reinforcing ribs. By connecting with the reinforcing rib 11 while ensuring the saturation of the pattern, the rigidity of the entire block-type pattern is improved, and the driving distance of the product is ensured.

[0017] On the first block - type pattern 6, the second block - type pattern 7, the third block - type pattern 8, and the fourth block - type pattern 9, the third horizontal slit 14, the first horizontal slit 12, the second horizontal slit 13, the second horizontal slit 13, the first horizontal slit 12, and the third horizontal slit 14 are provided in order from top to bottom. The first horizontal slit 12 and the second horizontal slit 13 communicate with the grooves on both the left and right sides of the block - type pattern where they are located, respectively, to divide the block - type pattern where they are located into five block - type pattern parts from top to bottom. Due to the existence of the third horizontal slit 14, the first horizontal slit 12, and the second horizontal slit 13, snow removal and drainage are carried out efficiently, and the grip performance is improved.

[0018] A horizontal sipe 15 is provided between adjacent fifth block - type patterns 10 in the circumferential direction. A horizontal transverse groove 16 is provided in one of the two adjacent fifth block - type patterns 10, and a variable - angle transverse groove 17 is provided in the other. The shoulder is an open shoulder. Snow removal and drainage are carried out efficiently, and the grip performance is improved.

[0019] A vertical slit 18 is provided in each fifth block - type pattern, communicating with the horizontal transverse groove and the variable - angle transverse groove 17 respectively, and vertical slits 18 are provided above and below the horizontal transverse groove and the variable - angle transverse groove 17 respectively.

[0020] A wear indicator 19 is provided in the groove, especially in the fifth groove. Its depth is designed to correspond to half of the groove depth or another depth smaller than the groove depth, and it is arranged with a six - equal - division division on the circumference. The depth of the wear indicator 19 can be designed according to the wear conditions in winter and summer seasons.

[0021] The depths of the first transverse slits 12, horizontal sipes 15, vertical slits 18, and horizontal transverse grooves 16 are less than or equal to the depth of the wear indicator 19, while the depths of the second transverse slits 13, variable-angle transverse grooves 17, and reinforcing ribs 11 are greater than the depth of the wear indicator 19. In winter, the first transverse slits 12, horizontal sipes, vertical slits 18, horizontal transverse grooves 16, second transverse slits 13, variable-angle transverse grooves 17, and reinforcing ribs 11 are all present, while in summer, only the second transverse slits 13, variable-angle transverse grooves 17, and reinforcing ribs 11 are present. This increases the rigidity between the circumferential block-type patterns, meeting the requirements for braking performance and handling stability on icy and snowy roads in winter, while also considering the wear resistance requirements in summer and avoiding troublesome tire changes.

[0022] The all-season studless tire pattern for icy and snowy roads provided in this application allows for the design of the depth of each slit and groove according to the length of winter icy and snowy weather and summer rainy and snowy weather. This prioritizes meeting the requirements for braking performance and handling stability on icy and snowy roads in winter, while also considering the requirements for wear resistance in summer, thus avoiding the hassle of tire changes. Furthermore, by further designing the depth of each slit and groove to take into account the change from winter icy and snowy weather to summer rainy and snowy weather, the tire can be used in both seasons.

[0023] The depth of the third transverse slit 14 is less than the depth of the wear indicator 19.

[0024] The horizontal lateral grooves 16 and variable-angle lateral grooves 17 on the fifth block-type pattern 10 are in communication with the fifth grooves 5, respectively, and extend from the fifth grooves 5 toward the tire sidewall on the fifth block-type pattern, with the width of the variable-angle lateral grooves increasing. The width at the narrowest point is 6-8 mm, and the width at the widest point is 10-14 mm.

[0025] The shoulder is an open shoulder, and when viewed in cross-section, the variable-angle lateral groove 17 has a symmetrical structure, and from the fifth groove 5 to the tire sidewall, the edges on one side of the groove wall are in the order of the first horizontal line 170, the first fold line 171, the second horizontal line 172, the second fold line 173, the third horizontal line 174, and the third fold line 175, with the first horizontal line 170, the first fold line 171, the second horizontal line 172, and the second fold line 173 located in the fifth block-type pattern 10, and from the fifth groove to the tire sidewall, the width of the variable-angle lateral groove widens, and the third fold line gradually narrows the width of the variable-angle lateral groove.

[0026] The vertical slit 18 is located in the center of the fifth block-shaped pattern, and the vertical slit 18 is connected to the position of the second horizontal line 172 of the variable-angle horizontal groove 17.

[0027] In the portion of the variable-angle transverse groove corresponding to the third horizontal line and the third fold line, the horizontal transverse groove 16 is connected to the symmetrical groove 20, and the width of the symmetrical groove 20 gradually narrows.

[0028] The design of horizontal lateral grooves and variable-angle lateral grooves significantly improves snow removal and enhances tire handling stability. The variable-angle lateral groove design also ensures efficient drainage.

[0029] The shoulder is an open shoulder and is provided with heat dissipation grooves 21, which enhance the snow removal and snow clearing capabilities of the tire when driving on icy and snowy roads, and ensure the tire's grip on icy and snowy roads, thereby ensuring the tire's handling stability.

[0030] The first block-type pattern 6, the second block-type pattern 7, the third block-type pattern 8, and the fourth block-type pattern 9 have a wide groove on one side and a narrow groove on the other. The first, second, and third lateral slits on each block-type pattern are obliquely positioned in the same direction. For the first, second, and third block-type patterns, if the first lateral slit is obliquely positioned from top to bottom from the wide groove to the narrow groove, the portion of the block-type pattern where the upper third lateral slit 14 is located extends into the narrow groove, forming a projection toward the narrow groove. If the first lateral slit is obliquely positioned from bottom to top from the wide groove to the narrow groove, the portion of the block-type pattern where the lower third lateral slit 14 is located extends into the narrow groove, forming a projection toward the narrow groove.

[0031] The first, second, and third block patterns are located relatively centrally in the tread pattern and have many steel grooves. As a result, the rigidity of the first, second, and third block patterns is weak. The block pattern portion where the third lateral slit 14 is located protrudes slightly toward the narrow groove, increasing the area of ​​the block pattern. This improves the rigidity of the block pattern and ensures snow road performance.

[0032] The first horizontal slit is located at 1 / 5 to 1 / 4 of the way through the block pattern, the second horizontal slit is located at 1 / 2 to 1 / 3 of the way through the block pattern, and the third horizontal slit is located at 1 / 8 to 1 / 7 of the way through the block pattern.

[0033] The cross-sectional shapes of the first block-type pattern 6, the second block-type pattern 7, the third block-type pattern 8, and the fourth block-type pattern 9 are similar to quadrilaterals, and in the cross-sectional view, the widthwise sides of the first block-type pattern 6, the second block-type pattern 7, the third block-type pattern 8, and the fourth block-type pattern 9 are angled in the same direction as the first horizontal slit. The angle of inclination, that is, the angle with respect to the horizontal, is 8° to 10°. The purpose of the inclination is to improve braking performance and handling stability on icy and snowy roads in winter while maintaining rigidity.

[0034] In the cross-sectional view, the widthwise edges of the first block-type pattern 6, the second block-type pattern 7, the third block-type pattern 8, and the fourth block-type pattern 9 can have the same inclination angle as the first transverse slit, and the inclination angles of the first transverse slit 12, the second transverse slit 13, and the third transverse slit 14 may also be the same. This alignment of directions contributes to noise reduction and improved handling stability.

[0035] The edges of the first block-type pattern 6 and the second block-type pattern 7 that are close to the wide grooves are curved, while the edges that are close to the narrow grooves are folded lines. Considering the tread pattern as a whole, handling stability and fuel efficiency are improved.

[0036] In the third block-type pattern 8, the edges near the wide grooves are folded lines, and the edges near the narrow grooves are also folded lines. In the fourth block-type pattern 9, the edges near the wide grooves are folded lines, and the edges near the narrow grooves are straight lines. Considering the tread pattern as a whole, handling stability and fuel efficiency are improved.

[0037] The first transverse slit 12 and the second transverse slit 13 on the third block-shaped pattern 8 and the fourth block-shaped pattern 9 divide the block-shaped pattern, forming five block-shaped pattern sections from top to bottom. Of these, the three central block-shaped pattern sections extend toward the wide groove, forming protrusions toward the wide groove. In the cross-sectional view, the corners formed by the first transverse slit 12 and the block-shaped pattern, the corners on the wide groove side, and the corners close to the second transverse slit 13 are chamfered.

[0038] In the left-side pattern, the first block-type pattern 6 has a first transverse slit that is angled from top to bottom, extending from a wide groove to a narrow groove. The portion of the block-type pattern where the upper third transverse slit 14 is located extends into the narrow groove, forming a projection toward the narrow groove. This design ensures heat dissipation from the block-type pattern and improves the overall rigidity of the block-type pattern.

[0039] In the second block-type pattern 7 of the left-side pattern, the first transverse slit is positioned diagonally from top to bottom, extending from the wide groove to the narrow groove. The portion of the block-type pattern where the upper third transverse slit 14 is located extends into the narrow groove, forming a projection toward the narrow groove. This design ensures heat dissipation from the block-type pattern and improves the overall rigidity of the block-type pattern.

[0040] In the left-side pattern, the third block-type pattern 8 has a first transverse slit positioned diagonally from bottom to top, extending from a wide groove to a narrow groove. The portion of the block-type pattern where the lower third transverse slit 14 is located extends into the narrow groove, forming a projection toward the narrow groove. This design ensures heat dissipation from the block-type pattern and improves the overall rigidity of the block-type pattern.

[0041] The block-shaped patterns on both the left and right sides of the groove are offset, with the offset being approximately 1 / 4 to 1 / 2 of the block-shaped pattern length, which contributes to grip performance on icy and snowy roads.

[0042] The tread pattern is symmetrical with respect to the center, and the pattern on the left side of the tire is rotated 180° around the center to form the pattern on the right side.

[0043] The widths of the second block pattern 7, the third block pattern 8, and the fourth block pattern 9 are 0.9 to 1.1 times that of the first block pattern 6, while the width of the fifth block pattern 10 is 1.4 to 1.5 times that of the second block pattern 7, the third block pattern 8, and the fourth block pattern 9.

[0044] The width of the third groove 3 and the fifth groove 5 is 0.9 to 1.1 times that of the first groove 1, the width of the first groove 1, the third groove 3, and the fifth groove 5 is in the range of 0.75 to 2 mm, and the width of the second groove 2 and the fourth groove 4 is in the range of 6 to 8 mm.

[0045] Figure 7 shows schematic cross-sectional views of the second and fourth grooves. The second and fourth grooves gradually narrow in width from the tire surface downwards, then remain constant in width, and the bottom of the groove is arc-shaped. The height L2 of the gradually narrowing section is 10-11 mm, the height L1-L2 of the section with constant width is 8.5-10 mm, the maximum width is 6-8 mm, and the minimum width is 4-5 mm. Also, C in the figure represents a full round fillet, meaning the cross-section of the bottom of the groove is arc-shaped.

[0046] As shown in Figure 8, the first, third, and fifth grooves have a constant width from the tire surface downwards, and the bottom of the grooves is arc-shaped.

[0047] The first groove has a depth L1 of 15-16 mm and a width W1 of 1.2-1.5 mm; the third groove has a depth L1 of 15-16 mm and a width W1 of 1.2-1.5 mm and 0.7-0.8 mm, respectively; and the fifth groove has a depth L1 of 10-11 mm and a width W1 of 1-1.2 mm.

[0048] The horizontal sipe 15 has a depth of 0.6-0.8 mm and a width of 6-8 mm. The horizontal lateral grooves on the fifth block-type pattern have a depth of 8-10 mm and a width of 4-6 mm. The variable-angle lateral grooves have a depth of 12-14 mm and a width of 6-14 mm.

[0049] Two adjacent second transverse slits 13 on the same block-shaped pattern are formed together by the 2D steel billet, and Figure 3 is a longitudinal section of the 2D steel billet, which is also a section of the two adjacent second transverse slits 13. Because the 2D steel billet has an "n" shape, the distance between the two far sides of the two adjacent second transverse slits 13 is the dimension W1 of the 2D steel billet, i.e., 3-6 mm. The distance between the two closest sides of the two adjacent second transverse slits 13 is the dimension W2 of the 2D steel billet, i.e., 2-4 mm. The depth of the second transverse slit 13 is the dimension L1 of the 2D steel billet, i.e., 12-14 mm. The distance in the normal direction between the portion between the two adjacent second transverse slits 13 and the tread is the dimension L2 of the 2D steel billet, i.e., 1.5-3 mm. Furthermore, C in the figure indicates that the bottom of the steel billet will be a full round fillet, meaning that the cross-section of the bottom of the second transverse slit 13 will be arc-shaped.

[0050] The first transverse slit on the block-shaped pattern is formed by a 3D steel billet, which has a "wave" shape. Figure 4 is a longitudinal section of the 3D steel billet, which is also a cross-section of the first transverse slit. The width of the first transverse slit at the same depth is the dimension W1 of the 3D steel billet, i.e., 0.6-0.8 mm. The depth of the first transverse slit is the dimension L1 of the 3D steel billet, i.e., 6-10 mm. The uppermost and lowermost ends of the first transverse slit are vertical sections, and the dimensions of these two vertical sections are the dimensions L1 and L2 of the 3D steel billet, respectively, with L1 being 5-7 mm and L2 being 2-3 mm. The intermediate curved section of the first transverse slit has an S-shape, and the dimensions of this section are L-L1-L2. In the figure, C represents a full round fillet, i.e., the intermediate curved section has an S-shape.

[0051] The third transverse slit on the block-type pattern is formed by a 2D steel billet, and Figure 5 is a longitudinal section of the 2D steel billet, which is also a cross-sectional view of the third transverse slit. The width of the third transverse slit is the dimension of the 2D steel billet W1, i.e., 0.8 to 1 mm, and the depth of the third transverse slit is the dimension of the 2D steel billet L1, i.e., 2 to 4 mm. In addition, C in the figure represents a full round fillet, meaning that the cross-section of the bottom of the third transverse slit is arc-shaped.

[0052] The horizontal sipes on the fifth block-type pattern are formed from 2D steel billets, and Figure 6 is a longitudinal section of the 2D steel billet, which is also a cross-section of the horizontal sipe. The width of the horizontal sipe is the dimension of the 2D steel billet W1, i.e., 0.4 to 0.6 mm, and the depth of the horizontal sipe is the dimension of the 2D steel billet L1, i.e., 8 to 10 mm. Also, C in the figure represents a full round fillet, meaning that the cross-section of the bottom of the horizontal sipe is arc-shaped.

[0053] The longitudinal slits on the fifth block-type pattern are formed by 2D steel billets, and Figure 6 is a longitudinal section of the 2D steel billet, which is also a cross-section of the longitudinal slit. The width of the longitudinal slit is the dimension of the 2D steel billet W1, i.e., 0.4 to 0.6 mm, and the depth of the longitudinal slit is the dimension of the 2D steel billet L1, i.e., 8 to 10 mm. In the figure, C represents a full round fillet, and the cross-section of the bottom of the longitudinal slit is arc-shaped.

[0054] Figure 9 shows the tread pattern surface of a tire pattern with the above-mentioned slit depth after 50% wear and when it is first used in the summer. The customer installs the tires around October, uses them from winter until April of the following year, and then uses them in the summer from April to October, at which point the tire's lifecycle ends.

[0055] The block-type pattern slit combination design of this application enhances the drainage and snow removal performance of the tread pattern, and the reinforcing rib design that connects the blocks improves the overall handling stability of the tire.

[0056] The saturation level of the tread pattern can be 67-73%, or even 70%, which can improve the fuel efficiency of the product to some extent.

[0057] The first, second, third, and fourth block-type patterns may use an equal-pitch design, and the number of pitches may be 60.

[0058] The fifth block-type pattern may use an equal-pitch design, and the number of pitches may be 30.

[0059] The overall pattern utilizes a 3D steel billet design of approximately 1,000 pieces to ensure grip and handling stability on icy and snowy surfaces. The groove design of this application, when combined with an open shoulder design, not only ensures the traction characteristics of the tire in the longitudinal direction but also improves the tire's drainage performance.

[0060] The above describes only preferred embodiments of the present invention and does not encompass all embodiments. The scope of protection of the present invention is not limited thereto, and the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments have been described, but any combination of these technical features should be considered to fall within the scope of this specification as long as it is not contradictory. If a combination of technical means is contradictory or unattainable, such a combination of technical means should be considered not to exist and to be outside the scope of protection claimed by the present invention. It should be noted to those skilled in the art or familiar with the art that replacing or modifying the technical means and the technical idea of ​​the invention with equivalents, or making some modifications or improvements, without departing from the spirit of the overall technical idea and inventive principles of the present invention is also within the scope of protection of the present invention. [Explanation of symbols]

[0061] 1. The first groove 2. The second groove 3. The Third Groove 4. The Fourth Groove 5 The Fifth Groove 6. First block-type pattern 7. Second block-type pattern 8. Third block-type pattern 9. The fourth block-type pattern 10. The fifth block-type pattern 11 Reinforcement Ribs 12 First transverse slit 13. Second transverse slit 14. Third transverse slit 15 horizontal sipes 16 Yokomizo 17 Variable angle horizontal groove 18 vertical slits 19 Indicators 20 Symmetrical grooves 21 Heat dissipation groove 170 First horizontal line 171 First fold line 172 The second horizontal line 173 Second fold line 174 The third horizontal line 175 Third fold line

Claims

1. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, comprising a tread pattern having block-type patterns arranged along the circumferential direction of the tire and grooves arranged along the circumferential direction of the tire, wherein the center of the tire width is a first groove (1), and from the first groove outwards to the left and right are a first block-type pattern (6), a second groove (2), a second block-type pattern (7), a third groove (3), a third block-type pattern (8), a fourth groove (4), and a fourth block-type pattern. The pattern (9), the fifth groove (5), and the fifth block-shaped pattern (10) are such that the widths of the first groove (1), the third groove (3), and the fifth groove (5) are smaller than the widths of the second groove (2) and the fourth groove (4), and for the first block-shaped pattern (6), the second block-shaped pattern (7), the third block-shaped pattern (8), and the fourth block-shaped pattern (9), adjacent block-shaped patterns on the same circumferential direction are connected by reinforcing ribs (11). On the first block-shaped pattern (6), the second block-shaped pattern (7), the third block-shaped pattern (8), and the fourth block-shaped pattern (9), a third horizontal slit (14), a first horizontal slit (12), a second horizontal slit (13), a second horizontal slit (13), a first horizontal slit (12), and a third horizontal slit (14) are provided in order from top to bottom, and the first horizontal slit (12) and the second horizontal slit (13) communicate with the grooves on both the left and right sides of the block-shaped pattern where they are located, thereby enabling the block-shaped pattern to communicate with the grooves on both sides. The pattern is divided into five sections from top to bottom, with horizontal sipes (15) provided between adjacent fifth block-shaped patterns (10) in the circumferential direction, a horizontal transverse groove (16) provided in one of two adjacent fifth block-shaped patterns (10), a variable-angle transverse groove (17) provided in the other, the shoulder is an open shoulder, a vertical slit (18) is provided in the center of each fifth block-shaped pattern, communicating with the horizontal transverse groove and the variable-angle transverse groove (17), and the vertical slits (18) are provided above and below the horizontal transverse groove and the variable-angle transverse groove (17), respectively. A wear indicator (19) is provided in the groove, and its depth is designed to correspond to half the groove depth or other depths less than the groove depth. The depth of the first transverse slit (12), the depth of the horizontal sipe (15), the depth of the vertical slit (18), and the depth of the horizontal transverse groove (16) are less than or equal to the depth of the wear indicator (19), while the depth of the second transverse slit (13), the depth of the variable-angle transverse groove (17), and the depth of the reinforcing rib (11) are greater than the depth of the wear indicator (19). A studless tire pattern suitable for both summer and winter use on icy and snowy roads, characterized by its unique design.

2. The wear indicator (19) is characterized by being arranged in six equal parts along the circumference of the corresponding groove, as described in claim 1, for a summer and winter studless tire pattern suitable for icy and snowy roads.

3. The variable-angle lateral groove (17) has a symmetrical structure, and from the fifth groove to the tire sidewall, the edges on one side of the groove wall are in the order of a first horizontal line (170), a first fold line (171), a second horizontal line (172), a second fold line (173), a third horizontal line (174), and a third fold line (175), and the first horizontal line (170), the first fold line (171), the second horizontal line (172), and the second fold line (173) are located in the fifth block-type pattern (10), and from the fifth groove to the tire sidewall, the width of the variable-angle lateral groove widens, and the third fold line gradually narrows the width of the variable-angle lateral groove. The vertical slit (18) is located in the center of the middle portion of the fifth block-shaped pattern, and the vertical slit (18) is connected to the position of the second horizontal line (172) of the variable-angle horizontal groove (17). In the portion of the variable-angle lateral groove corresponding to the third horizontal line and the third fold line, the horizontal lateral groove is connected to the symmetrical groove, and the width of the symmetrical groove (20) gradually narrows. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, as described in claim 1.

4. On both sides of the first block-shaped pattern, the second block-shaped pattern, the third block-shaped pattern, and the fourth block-shaped pattern, one side has a wide groove and the other side has a narrow groove, and the first transverse slit, the second transverse slit, and the third transverse slit on each block-shaped pattern are arranged obliquely in the same direction. With respect to the first block-type pattern, the second block-type pattern, and the third block-type pattern, if the first transverse slit is positioned diagonally from top to bottom from a wide groove to a narrow groove, the portion of the block-type pattern where the upper fourth transverse slit is located extends into the narrow groove and forms a projection toward the narrow groove; if the first transverse slit is positioned diagonally from bottom to top from a wide groove to a narrow groove, the portion of the block-type pattern where the lower fourth transverse slit is located extends into the narrow groove and forms a projection toward the narrow groove. The block-shaped pattern portions formed by dividing the block-shaped pattern by the first and second transverse slits on the third and fourth block-shaped patterns (8 and 9) extend toward the wide groove, forming protrusions toward the wide groove, and the corners of the block-shaped pattern formed between the first transverse slit and the wide groove are chamfered. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, as described in claim 1.

5. The edges of the first block-type pattern (6) and the second block-type pattern (7) that are close to the wide grooves are curved, and the edges that are close to the narrow grooves are polylines. The edges of the third block-type pattern (8) that are close to the wide grooves are fold lines, and the edges that are close to the narrow grooves are fold lines. The edges of the fourth block-type pattern (9) that are close to the wide grooves are polylines, and the edges that are close to the narrow grooves are straight lines. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, as described in claim 4.

6. In the left-side pattern, the first block-shaped pattern extends from a wide groove to a narrow groove, the first transverse slit is positioned diagonally from top to bottom, and the portion of the block-shaped pattern where the upper fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. In the left-side pattern, the second block-shaped pattern has the first transverse slits positioned diagonally from top to bottom, extending from the wide groove to the narrow groove, and the portion of the block-shaped pattern where the upper fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. In the left-side pattern, the third block-shaped pattern has the first transverse slits positioned diagonally from bottom to top, extending from the wide groove to the narrow groove, and the portion of the block-shaped pattern where the lower fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. In the left-side pattern, the fourth block-shaped pattern has the first transverse slit positioned diagonally from bottom to top, extending from the wide groove to the narrow groove. The portion of the block-shaped pattern where the lower fourth transverse slit is located extends into the narrow groove, forming a projection toward the narrow groove. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, as described in claim 5.

7. In the cross-sectional view, the widthwise edges of the first block-shaped pattern (6), the second block-shaped pattern (7), the third block-shaped pattern (8), and the fourth block-shaped pattern (9) are arranged obliquely in the same direction as the first transverse slit. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, as described in claim 4.

8. In the cross-sectional view, the widthwise edges of the first block-shaped pattern (6), the second block-shaped pattern (7), the third block-shaped pattern (8), and the fourth block-shaped pattern (9) have the same inclination angle as the first transverse slit, and the inclination angles of the first transverse slit, the second transverse slit, and the third transverse slit are the same. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, as described in claim 7.

9. A studless tire pattern suitable for both summer and winter use on icy and snowy roads, as described in any one of claims 1 to 8, characterized in that the tread pattern is symmetrical with respect to the center and the saturation of the tread pattern is 67 to 73%.

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