Tire

Abstract

The present invention relates to a tire having a tread surface, wherein the first edges of the first tread blocks and the first edges of the second tread blocks are oriented in the same direction in the circumferential direction; at each first edge of the first tread block, the angle between the first sidewall of the crown groove and the first lateral groove is an acute angle, and at each first edge of the second tread block, the angle between the second sidewall of the crown groove and the second lateral groove is an obtuse angle; the axial distance between the first edge of each first tread block and the first tread edge is greater than the axial distance between the second edge of the corresponding first tread block and the first tread edge, and the axial distance between the first edge of each second tread block and the second tread edge is greater than the axial distance between the second edge of the corresponding second tread block and the second tread edge.

Description

Technical Field

[0001] This invention relates to a tire, and more particularly to a pneumatic tire for use in winter conditions. Background Technology

[0002] When driving in winter conditions, pneumatic tires are needed that can provide excellent performance on snow and excellent handling stability on wet roads.

[0003] There is still a great need for improved pneumatic tires that offer superior performance and handling stability when driving on snow and wet roads. Summary of the Invention

[0004] A first aspect of the present invention provides a tire including a tread portion, the tread portion including a first tread edge and a second tread edge, a crown groove extending continuously along the circumferential direction of the tire's crown portion, a first land portion divided between the first tread edge and the crown groove, and a second land portion extending from the crown groove to the second tread edge, wherein the first land portion is provided with a plurality of first lateral grooves, the plurality of first lateral grooves being connected to the crown groove and extending from the crown groove towards the first tread edge; the second land portion is provided with a plurality of second lateral grooves, the plurality of second lateral grooves being connected to the crown groove and extending from the crown groove towards the second tread edge; the first land portion is divided into a plurality of first tread blocks by the crown groove and the plurality of first lateral grooves, and the second land portion is divided into a plurality of second tread blocks by the crown groove and the plurality of second lateral grooves; each first tread block has a first edge and a second edge located at the intersection of the crown groove and the first lateral groove, and a sidewall, the crown groove and the first lateral groove dividing the corresponding tread blocks, the sidewall extending from the first edge to the second edge, and... A portion of a first sidewall forms the crown groove; each second tread block has a first edge and a second edge located at the intersection of the crown groove and the second lateral groove, and a sidewall, the crown groove and the second lateral groove dividing the corresponding tread blocks, the sidewall extending from the first edge to the second edge and forming a portion of the second sidewall of the crown groove; the first edge of the first tread block and the first edge of the second tread block circumferentially face the same direction, at each first edge of the first tread block, the angle between the first sidewall of the crown groove and the first lateral groove is an acute angle, at each first edge of the second tread block, the angle between the second sidewall of the crown groove and the second lateral groove is an obtuse angle, the axial distance between the first edge of each first tread block and the first tread edge is greater than the axial distance between the second edge of the corresponding first tread block and the first tread edge, and the axial distance between the first edge of each second tread block and the second tread edge is greater than the axial distance between the second edge of the corresponding second tread block and the second tread edge.

[0005] The arrangement of this invention achieves better grip when the tire tends to slip. Since the first edges extend freely into the tread grooves, they can more easily penetrate snow when driving on snowy roads. Furthermore, due to the higher deformability of the first edges, the stiffness of each tread block is reduced, resulting in higher contact pressure.

[0006] When the tires tend to slip, the second tread block provides better grip, thus improving traction on snowy roads.

[0007] The first and second transverse grooves can effectively drain water, help prevent slippage, and improve performance and handling stability on wet surfaces.

[0008] Other features and advantages of the tire are described in the dependent claims and in the following description.

[0009] According to one embodiment of the invention, the crown groove extends continuously at least substantially at the axial center of the tire.

[0010] According to one embodiment of the present invention, the first sidewall of the tread groove is inclined relative to the circumferential direction in a first direction. The second sidewall of the tread groove is inclined relative to the circumferential direction in a second direction opposite to the first direction.

[0011] According to an embodiment of the present invention, each first tread block forming part of the first sidewall of the tread groove has three parts, including a first part adjacent to a first edge, a third part adjacent to a second edge, and a second part extending between the first part and the third part. The first part and the third part are inclined relative to the tire circumferential direction in a first direction, and the second part is inclined relative to the tire circumferential direction in a second direction opposite to the first direction.

[0012] According to one embodiment of the invention, the axial distance from the intersection of the first and second portions to the edge of the first tread is less than the axial distance from the intersection of the second and third portions to the edge of the first tread. This arrangement provides better grip when the tire tends to slip, thereby improving traction on snowy roads.

[0013] According to one embodiment of the invention, at each first edge of the first tread block, the angle between the first sidewall of the tread groove and the first lateral groove is in the range of 30 degrees to 55 degrees, and / or at each first edge of the second tread block, the angle between the second sidewall of the tread groove and the second lateral groove is in the range of 110 degrees to 140 degrees. It has been found that angles within these ranges can achieve excellent performance on snow-covered roads.

[0014] According to one embodiment of the invention, at each first edge of the first tread block, the angle between the first lateral groove and the tire circumferential direction is in the range of 30 degrees to 65 degrees. It has been found that angles within this range can achieve excellent performance on snowy roads.

[0015] According to one embodiment of the present invention, the tread portion further includes an outer groove that extends continuously along the tire circumferential direction between the crown groove and the edge of the second tread portion. The outer groove divides the outer sidewalls in the tire axial direction of the plurality of second tread blocks to form the first sidewall 4A of the outer groove 4.

[0016] In one embodiment of the present invention, each second tread block has a third edge and a fourth edge located at the intersection of the outer groove and the second lateral groove, the outer groove and the second lateral groove being used to divide each second tread block; wherein, at each third edge, the included angle between the outer groove and the second lateral groove is an acute angle, and at each fourth edge, the included angle between the outer groove and the second lateral groove is an obtuse angle, and the axial distance of the third edge from the edge of the second tread is greater than the axial distance of the fourth edge from the edge of the second tread.

[0017] In one embodiment of the present invention, the third edge of the second patterned block faces the same circumferential direction as the first edge of the second patterned block.

[0018] A second aspect of the invention, in conjunction with the first aspect, provides a tire comprising a tread portion, the tread portion including a first tread edge and a second tread edge, a first land portion adjacent to the first tread edge, and a second land portion adjacent to the first land portion; wherein the first land portion includes a plurality of lateral grooves extending in a direction from the first tread edge to the second tread edge, and a plurality of connecting grooves, each connecting groove connecting two adjacent lateral grooves in the tire circumferential direction. The plurality of connecting grooves includes pairs of circumferentially adjacent connecting grooves that at least partially overlap along the tire axial direction, and pairs of circumferentially adjacent connecting grooves that do not overlap along the tire axial direction, wherein the overlapping and non-overlapping pairs of connecting grooves are alternately arranged in the circumferential direction.

[0019] The paired, overlapping connecting grooves create a softer stiffness and higher edge contact pressure in the corresponding area of ​​the first tire face. Therefore, the edges at the intersections of the lateral grooves and connecting grooves can more easily engage with the snow surface, resulting in better grip when driving on snowy roads.

[0020] The first and third transverse grooves effectively drain water, helping to prevent slippage and improving performance and handling stability on wet surfaces.

[0021] According to one embodiment of the invention, the connecting groove is provided with a tread groove pattern extending along the reference line of the connecting groove. The tread groove pattern softens the rigidity of the first land portion, further enhancing grip when driving on snowy roads. Furthermore, the tread groove pattern provides a pair of additional edges along the bottom of the corresponding connecting groove. These additional edges can provide extra grip as the tire wears.

[0022] According to one embodiment of the present invention, a plurality of first lateral grooves completely traverse the first land portion and the first land portion includes a plurality of third lateral grooves extending in a direction from the crown groove to the edge of the first tread, but not connected to the crown groove.

[0023] According to an embodiment of the present invention, a plurality of first lateral grooves and third lateral grooves are arranged alternately in the tire circumferential direction.

[0024] According to one embodiment of the present invention, each first patterned block is provided with a pair of connecting grooves, which connect a first transverse groove and a third transverse groove located adjacent in the circumferential direction. The pair of connecting grooves provided in each first patterned block may be overlapping pairs of connecting grooves.

[0025] According to one embodiment of the present invention, a plurality of third lateral grooves are connected to the crown grooves through lateral grooves with a width smaller than the width of the third lateral grooves.

[0026] In one embodiment of the present invention, the first transverse groove is provided with a reinforcing rib, which protrudes from the bottom of the first transverse groove, extends along the width of the groove, and connects to the side wall of the first transverse groove.

[0027] According to one embodiment of the present invention, the reinforcing rib is disposed at the position where the connecting groove and the first transverse groove are connected.

[0028] The reinforcing ribs provide better grip and improve the tire's snow performance and braking performance.

[0029] According to one embodiment of the present invention, the tread portion further includes a third land portion divided between the outer groove and the edge of the second tread, wherein the third land portion is provided with a plurality of fourth lateral grooves connected to the outer groove and extending from the outer groove to the edge of the second tread, the third land portion is divided into a plurality of third tread blocks by the outer groove and the plurality of fourth lateral grooves, each third tread block having a first edge and a second edge located at the intersection of the outer groove and the fourth lateral groove for dividing the corresponding tread block, and a sidewall extending from the first edge to the second edge and forming the sidewall of the outer groove; the first edge of the third tread block faces the same circumferential direction as the first edge of the first tread block and the first edge of the second tread block, and at each first edge of the third tread block, the angle between the sidewall of the outer groove and the third lateral groove is an acute angle, and the axial distance between the first edge of each third tread block and the edge of the second tread is greater than the axial distance between the second edge of the corresponding third tread block and the edge of the second tread.

[0030] According to one embodiment of the present invention, the first lateral groove is provided with a plurality of different pitches between circumferentially adjacent grooves, and / or the second lateral groove is provided with a plurality of different pitches between circumferentially adjacent grooves. This pitch arrangement that varies along the circumferential direction can improve the noise characteristics of the tire.

[0031] According to one embodiment of the present invention, the first patterned block and / or the second patterned block and / or the third patterned block are provided with a grooved pattern. By providing such a grooved pattern, winter performance can be further improved.

[0032] According to one embodiment of the present invention, when the tire is mounted on a vehicle, the orientation of the tread is specified. When the tire is mounted on a vehicle, the first tread edge is the inner tread edge located inside the vehicle; when the tire is mounted on a vehicle, the second tread edge is the outer tread edge located outside the vehicle.

[0033] Other details and advantages of the tires will be explained with reference to the accompanying drawings. Attached Figure Description

[0034] Figure 1 This is a unfolded view of the tire tread section according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures

[0036] 1. Tire

[0037] 2nd pregnancy face

[0038] 3. Crown grooves

[0039] 3A First sidewall of the crown groove

[0040] 3B Second sidewall of the second trench

[0041] 4. Outer groove

[0042] 4A outer trench first sidewall

[0043] 4B The second sidewall of the outer groove

[0044] 5 First Land Division

[0045] 6 Second Land Division

[0046] 7 Third Land Division

[0047] 8 First transverse groove

[0048] 9 Second transverse groove

[0049] 10 First Pattern Block

[0050] 11 The first edge of the first patterned block

[0051] 12 The second edge of the first patterned block

[0052] 15 Side wall of the first patterned block

[0053] 16 The first part of the sidewall of the first patterned block

[0054] 17 The second part of the sidewall of the first patterned block

[0055] 18 The third part of the sidewall of the first patterned block

[0056] 20 Second Pattern Block

[0057] 21 The first edge of the second patterned block

[0058] 22 The second edge of the second patterned block

[0059] 23 The third edge of the second patterned block

[0060] 24 The fourth edge of the second patterned block

[0061] 25. Side wall of the second patterned block

[0062] 30 Third pattern block

[0063] 31 The first edge of the third patterned block

[0064] 32 The second edge of the third patterned block

[0065] 35. Side wall of the third patterned block

[0066] 40 Third transverse groove

[0067] 41 Connecting slot

[0068] 42 Transverse groove connecting the third transverse groove and the crown groove

[0069] 43 Reinforcing ribs

[0070] 44 Fourth transverse groove

[0071] 45. Central groove pattern

[0072] 46. ​​Groove pattern

[0073] α The angle between the first sidewall and the first transverse groove

[0074] β is the angle between the first lateral groove and the tire circumferential direction at each first edge.

[0075] γ The angle between the second sidewall and the second transverse groove

[0076] δ is the angle between the outer groove and the second transverse groove at each third edge.

[0077] ε is the angle between the outer groove and the second transverse groove at each fourth edge.

[0078] θ is the angle between the second sidewall of the outer groove and the third transverse groove at each first edge.

[0079] Te1 First Tread Edge

[0080] Te2 Second Tread Edge Detailed Implementation

[0081] Figure 1 This is a developed view of the tread portion 2 of a tire 1 according to an embodiment of the present invention. The tread portion 2 includes a first tread edge Te1 and a second tread edge Te2. When a standard load is applied to the tire 1 under standard conditions and the tire 1 contacts a flat surface at a camber angle of 0°, each of the first tread edge Te1 and the second tread edge Te2 is the outermost contact point in the tire's axial direction.

[0082] Standard condition refers to the state in which a tire is mounted on a standard rim, inflated to standard internal pressure, and with no load applied to it. In this specification, unless otherwise stated, the dimensions of tire components, etc., are values ​​measured under standard conditions. "Standard rim" is the rim defined by the standard for each tire within a standard system that includes the standard on which the tire is based, such as "Standard Rim" in the JATMA standard, "Design Rim" in the TRA standard, or "Measuring Rim" in the ETRTO standard. "Standard internal pressure" is the standard-defined air pressure for each tire within a standard system that includes the standard on which the tire is based; it is the "Maximum Air Pressure" in the JATMA standard, the maximum value shown in the "Tire Load Limits at Various Cold Inflation Pressures" table in the TRA standard, or the "Inflation Pressure" table in the ETRTO standard. "Standard load" is the standard-defined load for each tire within a standard system that includes the standard on which the tire is based; it is the maximum value shown in the "Maximum Load Capacity" table in the JATMA standard, the "Tire Load Limits at Various Cold Inflation Pressures" table in the TRA standard, or the "Load Capacity" table in the ETRTO standard.

[0083] In this embodiment of the invention, when the tire 1 is mounted on a vehicle, the orientation of the tread surface is specified. Therefore, when the tire is mounted on a vehicle, the first tread edge Te1 is the inner tread edge located inside the vehicle, and when the tire is mounted on a vehicle, the second tread edge Te2 is the outer tread edge located outside the vehicle.

[0084] The tread portion 2 includes a crown groove 3 extending continuously along the tire circumference and an outer groove 4 extending continuously along the tire circumference. The axial distance of the outer groove 4 from the second tread edge Te2 is less than the axial distance of the crown groove 3 from the second tread edge Te2. The crown groove 3 and the outer groove 4 divide the tread portion 2 into a first land portion 5 between the first tread edge Te1 and the crown groove 3, a second land portion 6 between the crown groove 3 and the outer groove 4, and a third land portion 7 between the outer groove 4 and the second tread edge Te2.

[0085] The first land portion 5 is provided with a plurality of first lateral grooves 8, which are connected to the crown groove 3 and extend from the crown groove 3 in a direction toward the first tread edge Te1. The second land portion 6 is provided with a plurality of second lateral grooves 9, which extend from the crown groove 3 in a direction toward the second tread edge Te2 and are connected to the crown groove 3 and the outer groove 4.

[0086] The first land section 5 is divided into multiple first tread blocks 10 by the crown groove 3 and multiple first lateral grooves 8. The second land section 6 is divided into multiple second tread blocks 20 by the crown groove 3, the outer groove 4 and multiple second lateral grooves 9.

[0087] The crown groove 3 extends continuously at least substantially at the axial center of the tire. The crown groove 3 includes a first sidewall 3A and a second sidewall 3B. The outer groove 4 includes a first sidewall 4A and a second sidewall 4B.

[0088] Relative to the circumferential direction, the first sidewall 3A of the crown groove 3 is inclined toward the first tread edge Te1 in a first direction, while the second sidewall 3B of the crown groove 3 is inclined in a second direction opposite to the first direction. Therefore, the crown groove 3 has a varying groove width along the circumferential direction.

[0089] Each first tread block 10 has a first edge 11 and a second edge 12 located at the intersection of the crown groove 3 and the first lateral groove 8, the crown groove 3 and the first lateral groove 8 dividing the corresponding tread block 10; and a sidewall 15 extending from the first edge 11 to the second edge 12 and forming part of the first sidewall 3A of the crown groove 3.

[0090] Each second tread block 20 has a first edge 21 and a second edge 22 located at the intersection of the crown groove 3 and the second lateral groove 9, the crown groove 3 and the second lateral groove 9 dividing the corresponding tread block 20; and a sidewall 25 extending from the first edge 21 to the second edge 22 and forming part of the second sidewall 3B of the crown groove 3.

[0091] Each second tread block 20 also has a third edge 23 and a fourth edge 24 located at the intersection of the outer groove 4 and the second lateral groove 9. The outer groove 4 and the second lateral groove 9 divide each second tread block 20. The third edge 23 is axially farther from the second tread edge Te2 than the fourth edge 24. Thus, the third edge 23 of the second tread block 20 faces the same circumferential direction as the first edge 21 of the second tread block 20.

[0092] The first edge 11 of the first tread block 10 and the first edge 21 of the second tread block 20 face the same circumferential direction. Therefore, compared with the corresponding second edge 12 of the first tread block 10, the axial distance of the first edge 11 of each first tread block 10 from the first tread edge Te1 is greater, and compared with the corresponding second edge 22 of the second tread block 20, the axial distance of the first edge 21 of each second tread block 20 from the second tread edge Te2 is greater.

[0093] At the first edge 11 of each first tread block 10, the angle α between the first sidewall 3A of the crown groove 3 and the first transverse groove 8 is an acute angle, and at the first edge 21 of each second tread block 20, the angle γ between the second sidewall 3B of the crown groove 3 and the second transverse groove 9 is an obtuse angle.

[0094] Because the first edge 11 extends freely into the tread groove 3 and forms an acute angle α, it can more easily enter the snow when driving on snowy roads. This results in better grip when the tire 1 tends to slip. Through their higher deformability, the first edge 11 of the first tread block 10 further reduces the stiffness of the corresponding tread block 10, thus having a higher ground contact pressure.

[0095] When tire 1 tends to slip, the second tread block 20 has even better grip, thereby improving traction on snowy roads.

[0096] Preferably, at each first edge 11 of the first tread block 10, the included angle α between the first sidewall 3A of the crown groove 3 and the first lateral groove 8 is in the range of 30 degrees to 55 degrees. Preferably, at each first edge 21 of the second tread block 10, the included angle γ between the second sidewall 3B of the crown groove 3 and the second lateral groove 9 is in the range of 110 degrees to 140 degrees.

[0097] The angle δ between the outer groove 4 and the second transverse groove 9 at each third edge is an acute angle. In the second tread block 20, the angle ε between the outer groove 4 and the second transverse groove 9 at each fourth edge 24 is equal to the angle γ between the second sidewall 3B of the crown groove 3 at each first edge 21 and the second transverse groove 9.

[0098] Preferably, at each first edge 11 of the first tread block 10, the angle β of the first lateral groove 8 relative to the tire circumferential direction is in the range of 30 degrees to 65 degrees.

[0099] Each first tread block 10 forming part of the first sidewall 3A of the tread groove 3 has a sidewall 15 comprising three parts: a first part 16 adjacent to the first edge 11, a third part 18 adjacent to the second edge 12, and a second part 17 extending between the first part 16 and the third part 18. The first part 16 and the third part 18 are inclined in a first direction relative to the tire circumference, and the second part 17 is inclined in a second direction opposite to the first direction relative to the tire circumference. Preferably, the axial distance from the intersection of the first part 16 and the second part 17 to the first tread edge Te1 is less than the axial distance from the intersection of the second part 17 and the third part 18 to the first tread edge Te1.

[0100] When tire 1 tends to slip, the second part 17 has better grip and thus improves traction on snowy roads.

[0101] The first land portion 5 includes a plurality of third lateral grooves 40 extending in the direction from the crown groove 3 to the first tread edge Te1 but not connected to the crown groove 3. The plurality of first lateral grooves 8 and third lateral grooves 40 are arranged alternately in the tire circumferential direction. The first land portion 5 also includes a plurality of connecting grooves 41, each connecting groove 41 connecting the first lateral grooves 8 and third lateral grooves 40 that are adjacent to each other in the tire circumferential direction.

[0102] The plurality of connecting grooves 41 include pairs of circumferentially adjacent connecting grooves 41 that at least partially overlap along the tire axial direction and pairs of circumferentially adjacent connecting grooves 41 that do not overlap along the tire axial direction, wherein the overlapping and non-overlapping pairs of circumferentially adjacent connecting grooves 41 are arranged alternately in the circumferential direction. Here, whether they overlap along the aforementioned tire axial direction is determined by comparing the opening ends of the connecting grooves to the transverse grooves. Thus, each first tread block 10 includes a pair of connecting grooves 41 to connect the first transverse groove 8 and the third transverse groove 40 located adjacent in the circumferential direction.

[0103] The paired overlapping connecting grooves 41 have softer stiffness and higher edge ground pressure in the corresponding areas of the first tread face 5. Therefore, the edges at the intersection between the first lateral groove 8 and the connecting groove 41, and at the intersection between the third lateral groove 40 and the connecting groove 41, are more likely to engage with the snow surface, resulting in better grip when driving on snowy roads.

[0104] The first transverse groove 8 and the third transverse groove 40 can effectively drain water, help prevent slippage, and improve performance and handling stability on wet surfaces.

[0105] In this embodiment of the invention, the connecting groove 41 is provided with a central grooving pattern 45 extending along the baseline of the connecting groove 41.

[0106] The central sipe 45 softens the rigidity of the first land section 5, further enhancing grip when driving on snowy roads. The central sipe 45 also features a pair of additional edges along the bottom of the corresponding connecting groove. These additional edges can provide extra grip as the tire wears down.

[0107] Additional sipes 46 can be provided in the first tread block 10 and / or the second tread block 20 and / or the third tread block 30 to improve the winter performance of the tire 1.

[0108] The first land section 5 may also include a lateral groove 42 that connects the third lateral groove 40 to the crown groove 3 and has a width smaller than that of the third lateral groove 40. Such a lateral groove 42 can further improve drainage and enhance performance on wet road surfaces.

[0109] In this embodiment of the invention, the first transverse groove 8 is provided with a reinforcing rib 43. The reinforcing rib 43 protrudes from the bottom of the first transverse groove 8, extends along the width of the groove, and connects to the sidewall of the first transverse groove 8. Specifically, the reinforcing rib 43 can be provided at the position where the connecting groove 41 connects to the first transverse groove 8. This reinforcing rib 43 provides better grip and improves the tire's snow performance and braking performance.

[0110] In this embodiment of the invention, the first transverse groove 8 is provided with multiple different pitches between circumferentially adjacent grooves.

[0111] Similarly, the second transverse groove 9 also has multiple different pitches between circumferentially adjacent grooves.

[0112] This pitch arrangement can improve the noise characteristics of the tire.

[0113] In this embodiment of the invention, the third land portion 7 is provided with a plurality of fourth transverse grooves 44, which are connected to the outer groove 4 and extend from the outer groove 4 in a direction toward the edge Te2 of the second tread.

[0114] The third land section 7 is divided into multiple third patterned blocks 30 by an outer groove 4 and multiple fourth transverse grooves 44. Each third patterned block 30 has a first edge 31 and a second edge 32 located at the intersection of the outer groove 4 and the multiple fourth transverse grooves 44, with the outer groove 4 and the fourth transverse grooves 44 dividing the corresponding patterned blocks. The sidewall 35 of the third patterned block 30 extends from the first edge 31 to the second edge 32 and forms part of the second sidewall 4B of the outer groove 4. The first edge of the third patterned block 30 faces the same direction in the circumferential direction as the first edge 11 of the first patterned block 10 and the first edge 21 of the second patterned block 20. At each first edge 31 of the third patterned block 30, the included angle θ between the second sidewall 4B of the outer groove 4 and the fourth transverse groove 44 is an acute angle.

[0115] The axial distance between the first edge 31 of each third tread block 30 and the second tread edge Te2 is greater than the axial distance between the second edge 32 of the corresponding third tread block 30 and the second tread edge Te2.

Claims

1. A tire (1) having a tread (2). The tummy rim (2) includes: First tread edge (Te1) and second tread edge (Te2); The crown groove (3) extends continuously along the circumferential direction of the crown portion of the tire (1); The first land portion (5) is divided between the first tread edge (Te1) and the crown groove (3); as well as The second land portion (6) extends from the crown groove (3) toward the edge of the second tread (Te2). Its features are, The first land portion (5) is provided with a plurality of first lateral grooves (8), which are connected to the crown groove (3) and extend from the crown groove (3) toward the first tread edge (Te1). The second land portion (6) is provided with a plurality of second lateral grooves (9), which are connected to the crown groove (3) and extend from the crown groove (3) toward the edge of the second tread (Te2). The first land portion (5) is divided into multiple first tread blocks (10) by the crown groove (3) and the multiple first transverse grooves (8). The second land portion (6) is divided into multiple second tread blocks (20) by the crown groove (3) and the multiple second lateral grooves (9). Each of the first tread blocks (10) has a first edge (11) and a second edge (12) located at the intersection of the crown groove (3) and the first lateral groove (8), and a sidewall (15). The crown groove (3) and the first lateral groove (8) divide the corresponding tread blocks. The sidewall (15) extends from the first edge (11) to the second edge (12) and forms part of the first sidewall (3A) of the crown groove (3). Each of the second tread blocks (20) has a first edge (21) and a second edge (22) located at the intersection of the crown groove (3) and the second lateral groove (9), and a sidewall (25), the crown groove (3) and the second lateral groove (9) dividing the corresponding tread blocks, the sidewall (25) extending from the first edge (21) to the second edge (22) and forming part of the second sidewall (3B) of the crown groove (3). The first edge (11) of the first patterned block (10) and the first edge (21) of the second patterned block (20) face the same direction in the circumferential direction. At each first edge (11) of the first tread block (10), the angle (α) between the first sidewall (3A) of the crown groove (3) and the first transverse groove (8) is an acute angle. At each first edge (21) of the second tread block (20), the angle (γ) between the second sidewall (3B) of the crown groove (3) and the second transverse groove (9) is an obtuse angle. The axial distance between the first edge (11) of each first tread block (10) and the first tread edge (Te1) is greater than the axial distance between the second edge (12) of the corresponding first tread block (10) and the first tread edge (Te1), and The axial distance from the first edge (21) of each second tread block (20) to the second tread edge (Te2) is greater than the axial distance from the second edge (22) of the corresponding second tread block (20) to the second tread edge (Te2). The first sidewall (3A) of the crown groove (3) is inclined relative to the circumferential direction in a first direction, and the second sidewall (3B) of the crown groove (3) is inclined in a second direction opposite to the first direction. The sidewall (15) of each first tread block (10) forming part of the first sidewall (3A) of the crown groove (3) has three parts, including a first part (16) adjacent to the first edge (11), a third part (18) adjacent to the second edge (12), and a second part (17) extending between the first part (16) and the third part (18). The first part (16) and the third part (18) are inclined relative to the tire circumference in the first direction, and the second part (17) is inclined relative to the tire circumference in the second direction opposite to the first direction.

2. The tire (1) according to claim 1, characterized in that, The axial distance from the intersection of the first part (16) and the second part (17) to the first tread edge (Te1) is less than the axial distance from the intersection of the second part (17) and the third part (18) to the first tread edge (Te1).

3. The tire (1) according to claim 1 or 2, characterized in that, At each of the first edges (11) of the first tread block (10), the included angle (α) between the first sidewall (3A) of the crown groove (3) and the first transverse groove (8) is in the range of 30 degrees to 55 degrees; and / or At each of the first edges (21) of the second tread block (20), the included angle (γ) between the second sidewall (3B) of the crown groove (3) and the second lateral groove (9) is in the range of 110 degrees to 140 degrees; and / or At each of the first edges (11) of the first tread block (10), the included angle (β) relative to the tire circumferential direction is in the range of 30 degrees to 65 degrees.

4. The tire (1) according to claim 1 or 2, characterized in that, The tread section (2) also has an outer groove (4) that extends continuously along the tire circumference between the crown groove (3) and the edge of the second tread (Te2), the outer groove (4) dividing the outer sidewall (25) in the tire axial direction of the plurality of second tread blocks (20) and forming the first sidewall (4A) of the outer groove (4).

5. The tire (1) according to claim 4, characterized in that, The second tread block (20) has a third edge (23) and a fourth edge (24) located at the intersection of the outer groove (4) and the second lateral groove (9). The outer groove (4) and the second lateral groove (9) divide each second tread block (20). At each third edge (23), the included angle (δ) between the outer groove (4) and the second lateral groove (9) is an acute angle. At each fourth edge (24), the included angle (ε) between the outer groove (4) and the second lateral groove (9) is an obtuse angle. The third edge (23) is axially farther from the second tread edge (Te2) than the fourth edge (24).

6. The tire (1) according to claim 1 or 2, characterized in that, The first land portion (5) has a plurality of lateral grooves (8, 40) extending in a direction from the first tread edge (Te1) to the second tread edge (Te2); and a plurality of connecting grooves (41), each connecting groove (41) connecting two lateral grooves (8, 40) that are adjacent to each other in the tire circumference. The plurality of connecting grooves (41) include pairs of circumferentially adjacent connecting grooves (41) that at least partially overlap in the tire axial direction and pairs of circumferentially adjacent connecting grooves (41) that do not overlap in the tire axial direction, wherein the overlapping and non-overlapping pairs of connecting grooves (41) are alternately arranged in the circumferential direction, and the connecting grooves (41) are provided with a central sipe pattern (45) extending along the baseline of the connecting grooves (41).

7. The tire (1) according to claim 1 or 2, characterized in that, The first land section (5) has a plurality of connecting grooves (41), each connecting groove (41) connecting to two first transverse grooves (8) that are adjacent to each other in the tire circumferential direction. The plurality of connecting grooves (41) include pairs of circumferentially adjacent connecting grooves (41) that at least partially overlap in the tire axial direction and pairs of circumferentially adjacent connecting grooves (41) that do not overlap in the tire axial direction, wherein the overlapping and non-overlapping pairs of connecting grooves (41) are alternately arranged in the circumferential direction, and the connecting grooves (41) are provided with a central sipe pattern (45) extending along the baseline of the connecting grooves (41).

8. The tire (1) according to claim 7, characterized in that, The plurality of first lateral grooves (8) completely traverse the first land portion (5), and the first land portion (5) has a plurality of third lateral grooves (40) extending from the crown groove (3) toward the first tread edge (Te1), but not connected to the crown groove (3).

9. The tire (1) according to claim 8, characterized in that, The plurality of first lateral grooves (8) and the third lateral grooves (40) are arranged alternately in the circumferential direction of the tire, and / or each of the plurality of first tread blocks (10) is provided with a pair of connecting grooves (41) connecting the circumferentially adjacent first lateral grooves (8) and third lateral grooves (40), and / or the plurality of third lateral grooves (40) are connected to the crown groove (3) through lateral grooves (42), the width of the lateral grooves (42) being smaller than the width of the third lateral grooves (40).

10. The tire (1) according to claim 7, characterized in that, The first transverse groove (8) is provided with a reinforcing rib (43), which protrudes from the bottom of the first transverse groove (8), extends along the width of the groove, and connects to the side wall of the first transverse groove (8).

11. The tire (1) according to claim 4, characterized in that, The tread portion (2) also has a third land portion (7) divided between the outer groove (4) and the second tread edge (Te2), wherein The third land section (7) is provided with a plurality of fourth lateral grooves (44), which are connected to the outer groove (4) and extend from the outer groove (4) to the second tread edge (Te2). The third land section (7) is divided into multiple third patterned blocks (30) by the outer groove (4) and multiple fourth transverse grooves (44). Each third patterned block (30) has a first edge (31) and a second edge (32) located at the intersection of the outer groove (4) and the fourth transverse groove (44), and a sidewall (35). The outer groove (4) and the fourth transverse groove (44) divide the corresponding patterned block. The sidewall (35) extends from the first edge (31) to the second edge (32) and forms part of the second sidewall (4B) of the outer groove (4). The first edge (31) of the third patterned block (30) faces the same direction in the circumferential direction as the first edge (11) of the first patterned block (10) and the first edge (21) of the second patterned block (20). At each first edge (31) of the third patterned block (30), the angle (θ) between the second sidewall (4B) of the outer groove (4) and the fourth transverse groove (44) is an acute angle, and The axial distance between the first edge (31) of each third tread block (30) and the second tread edge (Te2) is greater than the axial distance between the second edge (32) of the corresponding third tread block and the second tread edge (Te2).

12. The tire (1) according to claim 11, characterized in that, The first transverse groove (8) is provided with multiple different pitches between circumferentially adjacent grooves, and / or the second transverse groove (9) is provided with multiple different pitches between circumferentially adjacent grooves, and / or the first patterned block (10) and / or the second patterned block (20) and / or the third patterned block (30) are provided with knife groove patterns (46).

13. The tire (1) according to claim 1 or 2, characterized in that, When the tire is mounted on the vehicle, the orientation of the tread (2) is specified. When the tire is mounted on the vehicle, the first tread edge (Te1) is the inner tread edge located inside the vehicle, and when the tire is mounted on the vehicle, the second tread edge (Te2) is the outer tread edge located outside the vehicle.

14. The tire (1) according to claim 1 or 2, characterized in that, The crown groove (3) extends continuously at least substantially at the axial center of the tire.

15. The tire (1) according to claim 5, characterized in that, The third edge (23) of the second patterned block (20) faces the same direction in the circumferential direction as the first edge (21) of the second patterned block (20).

16. The tire (1) according to claim 10, characterized in that, The reinforcing rib (43) is located at the position where the connecting groove (41) connects with the first transverse groove (8).

Images