Winter tire

Abstract

The utility model provides a winter tire which comprises a tread part, a tire shoulder part and tire patterns arranged on the tread part and the tire shoulder part along the circumferential direction of the tire, the tire pattern comprises a central pattern block group, longitudinal straight grooves and a plurality of shoulder pattern blocks; the central pattern block group is positioned on two sides of the center line of the tire and is in slip symmetry about the center line of the tire; the longitudinal straight grooves are formed in two sides of the central pattern block group; the shoulder pattern blocks are arranged on two sides of the longitudinal straight grooves and obliquely extend from the center of the tread to two sides of the tread; the central pattern block group on any side comprises a plurality of first central pattern blocks obliquely extending from the central line of the tire to the two sides of the tread, and first central transverse grooves which are arranged between the adjacent first central pattern blocks, obliquely extend from the central line of the tire to the two sides of the tread and are communicated with the longitudinal straight grooves; in order to improve the wet land performance of the tire in winter, the tire is improved from the aspects of pattern design and outline structure, so that the grounding shape of the tire is close to a circle.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, in particular to a winter tire. Background Art

[0002] Currently, winter tires on the market generally have better snow performance and poor wet noise and comfort performance; ordinary tires have better wet noise and comfort, but poor snow performance; all-season tires are between winter tires and ordinary tires, that is, their snow performance is worse than winter tires, but their wet noise and comfort are better than winter tires. Currently, there is a need for a winter tire whose snow performance is better than all-season tires, but whose wet noise and comfort are also better than those of all-season tires.

[0003] Winter tires should pay more attention to wetland performance: because a layer of water film is formed when the tire contacts the ice surface. If there is no strong drainage ability, the tire's ability to grip the ice and snow surface cannot be reflected, which is prone to accidents. Therefore, professional magazine tests pay more and more attention to the wetland performance of winter tires.

[0004] The difficulties in improving the wet performance of winter tires mainly include the following aspects:

[0005] 1. Winter tire tread formula is softer;

[0006] Compared with the tread compounds of ordinary tires and all-season tires, the tread compound of winter tires is softer, and the width of the tire's contact patch will be wider than that of ordinary tires. Under the same load, the tire's contact length will be smaller than that of ordinary tires. The shorter the contact length, the fewer the transverse grooves on the tire pattern that serve as drainage contact the ground, resulting in wetland performance that is difficult to reach the level of ordinary tires.

[0007] 2. Winter tires have fewer longitudinal grooves;

[0008] For winter tire patterns, a single directional pattern is generally used without obvious longitudinal grooves, resulting in poor tread penetration and poor wet performance.

[0009] 3. The tire groove is deeper in winter;

[0010] The groove depth of winter tires is generally more than 9mm. The deeper the groove, the greater the noise.

[0011] 4. Winter tire tread blocks are complex;

[0012] Generally, passenger car tires have fewer grooves, smaller land and sea areas, and relatively simple patterns, so the noise is relatively small. However, in order to ensure grip on ice and snow, winter tires use a single-guide pattern, with complex grooves and many tread blocks. The comfort and noise performance of the tires are poor.

[0013] Therefore, it is necessary to design a winter tire product that has excellent snow performance and better wetland, noise and comfort than all-season tires. Utility Model Content

[0014] In order to solve the above technical problems, the utility model improves the wet performance of winter tires by improving the pattern design and contour structure so that the ground contact shape of the tire is close to a circle, thereby providing a winter tire product with excellent snow performance and better wet performance, noise and comfort than all-season tires. The specific technical solutions are as follows:

[0015] A winter tire comprises a tread portion, a shoulder portion, and a tire pattern arranged on the tread portion and the shoulder portion along the circumferential direction of the tire, wherein the tire pattern comprises a central pattern block group located on both sides of the tire center line and forming slip symmetry with respect to the tire center line, longitudinal straight grooves arranged on both sides of the central pattern block group, and a plurality of shoulder pattern blocks arranged on both sides of the longitudinal straight grooves and extending obliquely from the tread center to both sides of the tread; the central pattern block group on any side comprises a plurality of first central pattern blocks extending obliquely from the tire center line to both sides of the tread, a first central transverse groove arranged between adjacent first central pattern blocks and extending obliquely from the tire center line to both sides of the tread to communicate with the longitudinal straight groove, a second central pattern block arranged on both sides of the first central pattern block and extending obliquely to both sides of the tread, and a second central transverse groove arranged between the first central pattern block and the second central pattern block and communicating with the first central transverse groove; and a side transverse groove is arranged between any two adjacent shoulder pattern blocks.

[0016] Preferably, the area L1 of the central pattern block group distributed in the transverse direction of the tread and the arc length TDW of the tread have the following relationship: L1 = (50% to 60%) TDW; the width L2 of the longitudinal straight groove in the transverse direction of the tread = 4 mm to 10 mm.

[0017] Preferably, in area L1, T-shaped grooves are formed between the first center pattern blocks on both sides close to the center line of the tire, and between the first center pattern block and the second center pattern block of the center pattern block group on either side; in the area outside area L1 to the tread arc length TDW, an X-shaped groove is formed between the second center pattern block on the side close to the longitudinal straight groove and the shoulder pattern block.

[0018] Preferably, the angle α between the center line of the first central pattern block and the center line of the tire is 32° to 38°; the angle β between the center line of the second central pattern block and the center line of the tire is α+(0 to 5°).

[0019] Preferably, the T-shaped groove is composed of a first central transverse groove and a second central transverse groove, and the included angle α1 between the direction in which the second central transverse groove extends toward both sides of the tread and the centerline of the tire is 52° to 77°.

[0020] Preferably, the X-shaped groove is composed of a longitudinal straight groove and a first central transverse groove and a side transverse groove arranged on both sides of the longitudinal straight groove. A siphon is provided at the X-shaped groove, the bottom surface of the siphon is lower than the bottom surface of the longitudinal straight groove, the head of the siphon is a circular structure, the circular diameter D is smaller than the minimum width W of the X-shaped groove, and the width W1 of the siphon and the width WG of the side transverse groove have the following relationship: W1 = (10%~20%) WG.

[0021] Preferably, the second central pattern block is provided with a straight groove parallel to the longitudinal straight groove, and both ends of the straight groove are connected to the first central transverse groove.

[0022] Preferably, the first center pattern block is provided with an arrow-shaped groove, and the relationship between the area L5 where the arrow-shaped groove is distributed laterally along the tire tread and the arc length TDW of the tread satisfies: L5 = (0% ~ 20%) * TDW, and the relationship between the radial depth H of the arrow-shaped groove and the tread width GD1 satisfies: H = GD1 * (10% ~ 50%).

[0023] Preferably, the first center pattern block is arranged with a first pattern steel sheet, the second center pattern block (313) is arranged with a second pattern steel sheet, and the shoulder pattern block is arranged with a third pattern steel sheet, and the depth S3 of the first pattern steel sheet, the depth S2 of the second pattern steel sheet and the depth S1 of the third pattern steel sheet satisfy the following relationship: S3>S2>S1, wherein the depth difference between two adjacent pattern steel sheets is 0.5-1.5 mm.

[0024] Preferably, any one of the shoulder pattern blocks and a lateral groove adjacent thereto form a tread pattern section, the number of the tread pattern sections is an even number, and the tread pattern sections have three pattern pitches in total.

[0025] Preferably, the longitudinal rigidity / lateral rigidity of the tread pattern = 83% to 92%; the circumferential edge density / lateral edge density of the tread pattern = 89% to 112%; the sea-to-land ratio of the grooves of the tread without steel sheets is 42% to 46%; the total groove-to-land ratio of the tread containing steel sheets is 46% to 50%.

[0026] Preferably, on any radial cross section of the tire, the contour between the highest point F of the tread and the end point E on one side of the tread is divided into a first arc and a second arc in sequence, and the radius RC1 of the first arc, the radius RC2 of the second arc, the arc length CL1 of the first arc, the arc length CL2 of the second arc, the nominal section width NSW of the tire, and the tread arc length TDW have the following relationship: RC1 = RC2 = NSW*(100% to 200%); the spacing WL between the upper sidewall arc R1 and the lower sidewall arc R2 = (-5mm to 5mm); the radial height SDH from the widest point C of the tire to the tire heel A and the highest point of the tread The radial height SH from F to the heel A has the following relationship: SDH≤50%SH; the radial height SHD from the highest point F of the tread to the end point E on one side of the tread has the following relationship with the tread arc length TDW: SHD=TDW*(5%~8%); the tread width GD1 and the shoulder width GD2 have the following relationship: GD2=GD1-(2mm~4mm); the sidewall width WSW and the shoulder width GD2 have the following relationship: WSW=(40%~80%)GD2; the outer diameter J-DIA of the tire on the mold satisfies the following relationship: J-DIA=standard design value+2mm.

[0027] It can be seen from the above technical scheme that the utility model has the following beneficial effects: in order to improve the wet performance of winter tires, the utility model starts with improvements in pattern design and contour structure so that the ground contact shape of the tire is close to a circle. Specifically, in terms of pattern design, the utility model forms a center pattern block group and shoulder pattern blocks from the center line of the tire to both sides of the tread, and sets longitudinal straight grooves between the center pattern blocks and the shoulder pattern blocks to improve the penetration of the pattern grooves and improve the wet performance of the tire; at the same time, the center pattern block group is divided into a first center pattern block on the side close to the center line of the tire and a second center pattern block on the side away from the center line of the tire. A central pattern block is provided, and a first central transverse groove connected to the longitudinal straight groove is arranged between adjacent first central pattern blocks and between adjacent second central pattern blocks, and a second central transverse groove connected to the first central transverse groove is arranged between the first central pattern block and the second central pattern block. In this way, when the ground contact length of the winter tire is shorter than that of the ordinary tire due to the softer formula, more transverse grooves can be formed on the tire tread, thereby improving the drainage effect of the tire, so that the wet performance of the winter tire reaches the level of the ordinary tire; at the same time, in terms of the contour structure, the utility model designs the structural features that affect the ground contact of the tire, so as to further make the ground contact shape of the tire close to a circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the tire tread contacting the ground;

[0029] Figure 2 This is a schematic diagram of the structure of the tire pattern of the utility model;

[0030] Figure 3 It is a structural schematic diagram of the tire profile of the utility model;

[0031] Figure 4 It is a partial enlarged view of the T-groove;

[0032] Figure 5 It is a partial enlarged view of the X-shaped groove;

[0033] Figure 6 It is a schematic diagram of the structure of the connection between the siphon and the tread;

[0034] Figure 7 This is a schematic diagram of the structure of the arrow-shaped groove;

[0035] Figure 8 A schematic diagram of the tread grounding of the tire product provided by the utility model.

[0036] In the figure: 10, tread portion; 20, shoulder portion; 311, first center pattern block; 312, first center transverse groove; 313, second center pattern block; 314, second center transverse groove; 315, straight groove; 316, arrow-shaped groove; 317, first pattern steel sheet; 318, second center pattern block; 319, third center pattern steel sheet; 320, longitudinal straight groove; 330, shoulder pattern block; 340, side transverse groove. DETAILED DESCRIPTION

[0037] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. Before describing in detail the technical solutions of each embodiment of the present invention, the nouns and terms involved are explained. In this specification, components with the same name or the same number represent similar or identical structures and are only for illustrative purposes.

[0038] In order to improve wet performance and ensure optimal snow and noise performance, the utility model mainly focuses on the contour, structure and pattern design to achieve Figure 1 The required ground contact shape mainly increases the tire ground contact length (Ly) while maintaining the tire ground contact width (Lx) so that Ly=Lx*(95%~105%) and the shape is close to a circle.

[0039] In order to achieve the above-mentioned purpose, the following technical solutions are provided for the utility model of the embodiment: Figure 2 , Figure 3A winter tire, comprising a tread portion 10, a shoulder portion 20 and a tire pattern arranged on the tread portion and the shoulder portion along the tire circumferential direction, wherein the tire pattern comprises a central pattern block group located on both sides of the tire centerline and forming a slip symmetry with respect to the tire centerline, a longitudinal straight groove 320 arranged on both sides of the central pattern block group and a plurality of shoulder pattern blocks 330 arranged on both sides of the longitudinal straight groove and extending obliquely from the tread center to both sides of the tread, wherein the width L2 of the longitudinal straight groove 320 in the transverse direction of the tread is 4 mm to 10 mm; the central pattern block group on either side comprises a plurality of first central pattern blocks 311 extending obliquely from the tire centerline to both sides of the tread, a first central transverse groove 312 arranged between adjacent first central pattern blocks and extending obliquely from the tire centerline to both sides of the tread to communicate with the longitudinal straight groove, a second central pattern block 313 arranged on both sides of the first central pattern block and extending obliquely to both sides of the tread, and a plurality of shoulder pattern blocks 330 arranged between the first central pattern block and the second central pattern block and extending obliquely to both sides of the tread. A second center transverse groove 314 connected to the groove; a side transverse groove 340 is provided between any two adjacent shoulder pattern blocks. The utility model forms a center pattern block group and a shoulder pattern block from the tire center line to both sides of the tread, and a longitudinal straight groove is provided between the center pattern block and the shoulder pattern block to improve the penetration of the pattern groove and improve the wet performance of the tire; at the same time, the center pattern block group is divided into a first center pattern block on the side close to the tire center line and a second center pattern block arranged on the side away from the tire center line of the first center pattern block, and a first center transverse groove connected to the longitudinal straight groove is provided between adjacent first center pattern blocks and between adjacent second center pattern blocks, and a second center transverse groove connected to the first center transverse groove is provided between the first center pattern block and the second center pattern block. In this way, when the ground contact length of the winter tire is shorter than that of the ordinary tire due to the softer formula, more transverse grooves can be formed on the tire tread, thereby improving the drainage effect of the tire, so that the wet performance of the winter tire reaches the level of the ordinary tire.

[0040] As a preferred technical solution of this embodiment, in order to ensure wet and snow performance, the tire tread pattern is divided into two parts, namely the L1 part of the middle block of the tire and the L1~TDW part of the shoulder. The L1 part is the area where the central pattern block group is distributed laterally along the tread, and the L1 part is responsible for the grip on snow and wet land. Specifically, the L1 and the tread arc length TDW have the following relationship: L1=(50%~60%)TDW.

[0041] Further references Figure 4 , Figure 5It should be noted that, in order to ensure the wet and snow performance of the tire, in area L1, T-grooves are formed between the first center pattern blocks 311 on both sides of the tire centerline, and between the first center pattern block and the second center pattern block 313 of the center pattern block group on either side; at the same time, in the area outside area L1 to the tread arc length TDW, an X-groove is formed between the second center pattern block on the side close to the longitudinal straight groove and the shoulder pattern block 330.

[0042] Furthermore, in order to ensure that the tire noise takes into account both wet and snow performance, the angle between the tire tread block and the tire centerline needs to be controlled within a specified range, wherein the angle α between the centerline of the first center tread block 311 and the tire centerline is 32°~38°; the angle β between the centerline of the second center tread block 313 and the tire centerline is α+(0~5°).

[0043] It should be noted that the T-shaped groove is composed of a first center transverse groove 312 and a second center transverse groove 314, that is, a groove of T-shaped structure is formed on the tire tread between the first center pattern block in the center pattern block group and between the first center pattern block and the second center pattern block. At the same time, in order to ensure the wet and snow performance of the tire, the direction in which the second center transverse groove extends to both sides of the tread includes an angle α1=52°~77° with the center line of the tire.

[0044] Further, see Figure 6 The X-shaped groove is composed of a longitudinal straight groove 320 and a first central transverse groove 312 and a side transverse groove 340 arranged on both sides of the longitudinal straight groove, that is, the longitudinal straight groove of the tire tread and the first central transverse groove on both sides thereof and the side transverse groove of the shoulder pattern block form an X-shaped groove. At the same time, in order to ensure wetland performance, a siphon 40 is provided at the X-shaped groove, and the bottom surface of the siphon is lower than the bottom surface of the longitudinal straight groove. The head of the siphon is a circular structure, and the circular diameter D is smaller than the minimum width W of the X-shaped groove. The width W1 of the siphon and the width WG of the side transverse groove have the following relationship: W1 = (10%~20%) WG.

[0045] Furthermore, in order to ensure the wet performance of the tire, a straight groove 315 parallel to the longitudinal straight groove is provided on the second center tread block 313, and both ends of the straight groove are connected to the first center transverse groove 312. The presence of the straight groove and the longitudinal straight groove can improve the snow cutting and drainage capabilities of the tread block when the tire is running.

[0046] Further, see Figure 7In order to ensure the snow performance of the tire and increase the cutting force, an arrow-shaped groove 316 is provided on the first center pattern block 311. The arrow-shaped groove can be set at the edge of the first center pattern block or in the middle area of ​​the first center pattern block. The relationship between the area L5 of the arrow-shaped groove distributed laterally along the tire tread and the arc length TDW of the tread satisfies: L5 = (0% ~ 20%) * TDW, and the relationship between the depth H of the arrow-shaped groove along the radial direction and the tread width GD1 satisfies: H = GD1 * (10% ~ 50%). The entity diagram is as shown in FIG. Figure 7 shown.

[0047] Furthermore, in order to ensure the snow performance of the tire, a first pattern steel sheet 317 is arranged in the first center pattern block 311, a second pattern steel sheet 318 is arranged in the second center pattern block 313, and a third pattern steel sheet 319 is arranged in the shoulder pattern block 330. At the same time, the depth S3 of the first pattern steel sheet, the depth S2 of the second pattern steel sheet and the depth S1 of the third pattern steel sheet are designed in a decreasing slope manner and satisfy the following relationship: S3>S2>S1, and the depth difference between two adjacent pattern steel sheets is 0.5~1.5mm.

[0048] Furthermore, any one of the shoulder pattern blocks 330 and an adjacent side transverse groove 340 form a tread pattern section, the number of the tread pattern sections is an even number, and there are three tread pattern pitches in the tread pattern sections. The tire tread of this embodiment has three different pattern pitches, the total number of pattern pitches is an even number and a double-pitch cross arrangement is adopted, and the pattern is arranged cyclically in this manner in the circumferential direction of the tire, which can effectively reduce pattern noise.

[0049] As the preferred technical solution of this embodiment, in order to ensure wet and snow performance, the longitudinal rigidity / lateral rigidity of the tread pattern = 83% ~ 92%; at the same time, the circumferential edge density / lateral edge density of the tread pattern = 89% ~ 112%; the sea-to-land ratio of the tread groove without steel sheets is 42% ~ 46%; the total groove sea-to-land ratio of the tread containing steel sheets is 46% ~ 50%.

[0050] The tread as described above mainly focuses on the ratio design of pattern design parameters, mainly on the ratio of pattern land and sea, the ratio of pattern rigidity, the ratio of pattern edge density, and the design of pattern nodes, so as to ensure the optimal combination of pattern and contour structure.

[0051] At the same time, in terms of tire contour, in order to ensure that the tire is grounded, on any radial cross-section of the tire, the contour between the highest point F of the tread and the end point E on one side of the tread is divided into a first arc 51 and a second arc 52 in sequence, and the radius RC1 of the first arc, the radius RC2 of the second arc, the arc length CL1 of the first arc, the arc length CL2 of the second arc, the nominal section width NSW of the tire, and the tread arc length TDW have the following relationship: RC1 = RC2 = NSW*(100% to 200%); the spacing WL between the upper sidewall arc R1 and the lower sidewall arc R2 = (-5mm to 5mm); the radial height from the widest point C of the tire to the tire heel A The relationship between SDH and the radial height SH from the highest point F of the tread to the heel A is as follows: SDH≤50%SH; the relationship between the radial height SHD from the highest point F of the tread to the end point E on one side of the tread and the tread arc length TDW is as follows: SHD=TDW*(5%~8%); the relationship between the tread width GD1 and the shoulder width GD2 is as follows: GD2=GD1-(2mm~4mm); the relationship between the sidewall width WSW and the shoulder width GD2 is as follows: WSW=(40%~80%)GD2; the outer diameter J-DIA of the tire on the mold satisfies the following relationship: J-DIA=standard design value+2mm.

[0052] In order to verify the feasibility of the above scheme, the pattern parameters and complex pattern grounding analysis were carried out on the products made by the above scheme, the previous generation products, and the all-season tire products. The pattern parameter design is shown in Table 1. The test conditions are as follows: 1. Test vehicle: Volkswagen Golf; 2. Test air pressure: 250kPa; 3. Test load: 1 person + vehicle weight; 4. Test location: European test center; 5. Test tire specifications: 205 / 55R16.

[0053]

[0054] Table 1-Product pattern design parameter table

[0055]

[0056]

[0057] Table 2 - Test product performance table

[0058] Among them, the grounding simulation results of this product are as follows Figure 8 , satisfying Ly=Lx*(95%~105%). At the same time, the noise performance, comfort, snow braking and wet braking test results of the previous generation products, all-season tire products, products of Company C and this product are shown in Table 2 above. It can be seen from Table 2 that the product of the utility model meets the wetland, noise, snow and comfort requirements of winter tires by correspondingly designing the tire profile and pattern.

[0059] The above-described embodiments are merely descriptions of preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A winter tire, comprising a tread portion (10), a shoulder portion (20), and a tire pattern arranged on the tread portion and the shoulder portion along the tire circumference, characterized in that: The tire pattern comprises a central pattern block group located on both sides of the tire center line and forming a slip symmetry with respect to the tire center line, longitudinal straight grooves (320) arranged on both sides of the central pattern block group, and a plurality of shoulder pattern blocks (330) arranged on both sides of the longitudinal straight grooves and extending obliquely from the tread center to both sides of the tread; the central pattern block group on any side comprises a plurality of first central pattern blocks (311) extending obliquely from the tire center line to both sides of the tread, a first central transverse groove (312) arranged between adjacent first central pattern blocks and extending obliquely from the tire center line to both sides of the tread to communicate with the longitudinal straight groove, a second central pattern block (313) arranged on both sides of the first central pattern block and extending obliquely to both sides of the tread, and a second central transverse groove (314) arranged between the first central pattern block and the second central pattern block and communicating with the first central transverse groove; and a side transverse groove (340) is arranged between any two adjacent shoulder pattern blocks.

2. The winter tire according to claim 1, characterized in that The relationship between the area L1 of the central pattern block group distributed in the transverse direction of the tread and the arc length TDW of the tread is as follows: L1 = (50% to 60%) TDW; the width L2 of the longitudinal straight groove in the transverse direction of the tread is 4 mm to 10 mm.

3. The winter tire according to claim 2, characterized in that In the area L1, T-shaped grooves are formed between the first center pattern blocks (311) on both sides close to the tire center line, and between the first center pattern block and the second center pattern block (313) of the center pattern block group on either side; and in the area outside the area L1 to the tread arc length TDW, X-shaped grooves are formed between the second center pattern block on the side close to the longitudinal straight groove and the shoulder pattern block (330).

4. The winter tire according to claim 3, characterized in that The angle α between the center line of the first center pattern block (311) and the center line of the tire is 32° to 38°; the angle β between the center line of the second center pattern block (313) and the center line of the tire is α+(0 to 5°).

5. The winter tire according to claim 3, characterized in that The T-shaped groove is composed of a first central transverse groove (312) and a second central transverse groove (314), wherein the angle α1 between the direction in which the second central transverse groove extends to both sides of the tread and the tire centerline is 52° to 77°.

6. The winter tire according to claim 3, characterized in that The X-shaped groove is composed of a longitudinal straight groove (320) and a first central transverse groove (312) and a side transverse groove (340) arranged on both sides of the longitudinal straight groove. A siphon (40) is arranged at the X-shaped groove. The bottom surface of the siphon is lower than the bottom surface of the longitudinal straight groove. The head of the siphon is a circular structure. The circular diameter D is smaller than the minimum width W of the X-shaped groove. The width W1 of the siphon and the width WG of the side transverse groove have the following relationship: W1=(10% to 20%) WG.

7. The winter tire according to claim 6, characterized in that The second central pattern block (313) is provided with a straight groove (315) parallel to the longitudinal straight groove, and both ends of the straight groove are connected to the first central transverse groove (312).

8. The winter tire according to claim 3, characterized in that The first center pattern block (311) is provided with an arrow-shaped groove (316), and the relationship between the area L5 of the arrow-shaped groove distributed laterally along the tire tread and the arc length TDW of the tread satisfies: L5=(0%-20%)*TDW, and the relationship between the depth H of the arrow-shaped groove along the radial direction and the tread width GD1 satisfies: H=GD1*(10%-50%).

9. The winter tire according to claim 1, characterized in that The first central pattern block (311) is arranged with a first pattern steel sheet (317), the second central pattern block (313) is arranged with a second pattern steel sheet (318), and the shoulder pattern block (330) is arranged with a third pattern steel sheet (319), the depth S3 of the first pattern steel sheet, the depth S2 of the second pattern steel sheet, and the depth S1 of the third pattern steel sheet satisfy the following relationship: S3>S2>S1, wherein the depth difference between two adjacent pattern steel sheets is 0.5-1.5 mm.

10. The winter tire according to claim 1, characterized in that Any one of the shoulder pattern blocks (330) and a side transverse groove (340) adjacent thereto form a tread pattern section, the number of the tread pattern sections is an even number, and the tread pattern sections have three pattern pitches in total.

11. The winter tire according to claim 1, characterized in that The longitudinal rigidity / lateral rigidity of the tread pattern = 83% to 92%; the circumferential edge density / lateral edge density of the tread pattern = 89% to 112%; the sea-land ratio of the pattern groove of the tread without steel sheets is 42% to 46%; the total sea-land ratio of the groove of the tread with steel sheets is 46% to 50%.

12. The winter tire according to claim 1, characterized in that On any radial cross section of the tire, the contour between the highest point F of the tread and the end point E on one side of the tread is divided into a first arc (51) and a second arc (52) in sequence, and the radius RC1 of the first arc, the radius RC2 of the second arc, the arc length CL1 of the first arc, the arc length CL2 of the second arc, the nominal section width NSW of the tire, and the tread arc length TDW have the following relationship: RC1=RC2=NSW*(100%-200%); the spacing WL between the upper sidewall arc R1 and the lower sidewall arc R2=(-5mm-5mm); the radial height SDH from the widest point C of the tire to the bead heel A is equal to the radial height SDH of the tread. The radial height SH from the high point F to the heel A has the following relationship: SDH≤50%SH; the radial height SHD from the highest point F of the tread to the end point E on one side of the tread has the following relationship with the tread arc length TDW: SHD=TDW*(5%~8%); the tread width GD1 and the shoulder width GD2 have the following relationship: GD2=GD1-(2mm~4mm); the sidewall width WSW and the shoulder width GD2 have the following relationship: WSW=(40%~80%)GD2; the outer diameter J-DIA of the tire on the mold satisfies the following relationship: J-DIA=standard design value+2mm.

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