Multifunctional tire tread

Abstract

The invention relates to a multifunctional tire tread, and belongs to the technical field of tires. The multifunctional tire tread comprises a plurality of tread areas divided by at least one interface positioned below a tire crown central area, and the plurality of tread areas are used for filling different types of rubber materials. The multifunctional tire tread can meet various performance requirements of different parts of the tire tread at the same time, the uniformity of the tire is improved, the production cost of the tire tread is reduced, and tires with different performance requirements can be customized by changing formulas in the partitions.

Description

Technical Field

[0001] The present invention belongs to the technical field of tires, and in particular relates to a multifunctional tire tread suitable for new energy vehicles. Background Art

[0002] In recent years, with the increasing market share of new energy vehicles, the market demand for new energy vehicle tires has continued to increase. In order to meet the performance needs of new energy vehicles, when developing new energy vehicle tires, performance improvements are usually made in terms of outer contour, asymmetric pattern style, tread formula, construction structure, frame material, etc.

[0003] At present, when designing tire treads, many manufacturers use contour design and asymmetric pattern styles to partition tire performance to improve tire performance. Usually, the drainage performance of the inner side of the tire is enhanced by increasing the width of the inner longitudinal grooves and the number and width of the lateral grooves of the pattern blocks, and the grip of the outer side of the tire is improved by reducing the width of the grooves to increase the area of ​​the pattern blocks and changing the groove angle. However, this conventional design will lead to a significant difference in the sea-to-land ratio between the inner and outer sides of the same tire, which will cause a loss of tire uniformity and fail to take into account both wet performance and grip performance.

[0004] Therefore, it is necessary to provide a multifunctional tire tread structure that takes into account multiple performances. Summary of the invention

[0005] In view of the technical problems that the conventional design of the tire tread will lead to a significant difference in the sea-to-land ratio between the inner and outer sides of the same tire, resulting in a loss of tire uniformity and failure to take into account both wet skid performance and grip performance, the present invention provides a multifunctional tire tread, which divides the tread into zones by using dividing lines of different positions and shapes, and selects the rubber formula according to the different performance requirements of different tread parts, thereby simultaneously meeting the various performance requirements required for different positions of the tire tread, improving the uniformity of the tire, reducing the production cost of the tire tread, and can also customize tires with different performance requirements by changing the formula within the zone.

[0006] The present invention provides a multifunctional tire tread, comprising a plurality of tread areas divided by at least one interface below the crown center area, wherein the plurality of tread areas are used to fill different types of rubber materials. By dividing the tire tread into zones and using different rubber material formulas in different zones, different performances required by different parts of the same tire tread can be met.

[0007] In some embodiments, both ends of the interface are located in the lower area of ​​the first tread at the center of the crown, and the distance from the lower end of the interface to the bottom of the tread is less than the distance from the upper end of the interface to the bottom of the tread, the horizontal length m of the interface and the length M of the first tread satisfy m / M=2 / 3, and the distance m1 from the lower end of the interface to the inner end of the first tread and the distance m2 from the upper end of the interface to the outer end of the first tread satisfy m1=m2=m / 4. This technical solution can reduce the adverse effects of the flow of rubber during vulcanization on the contact surface of the two tread formulations, such as delamination.

[0008] In some embodiments, the first V-shaped recess is symmetrically arranged on both sides of the crown centerline, the outer side of the first V-shaped recess is connected to the second tread, the two ends of the interface are respectively located in the outer area of ​​the lowest point of the first V-shaped recess on both sides of the crown centerline, and the distance from the lower end point of the interface to the bottom of the tread is less than the distance from the upper end point of the interface to the bottom of the tread, and the distance n1 from the two end points of the interface to the lowest point of the adjacent first V-shaped recess and the distance N from the lowest point of the first V-shaped recess to the inner end point of the adjacent second tread satisfy n1 / N=(0.25-0.45): 1. This technical solution is conducive to increasing the contact area of ​​two rubber materials with different formulations by increasing the horizontal length of the dividing line, reducing the possibility of delamination, and facilitating the stability of the interface between the two functional divisions of the tread.

[0009] In some embodiments, the interface is a sawtooth structure, and the interface divides the tire tread into two tread areas of equal volume. This technical solution uses a sawtooth interface to make the two tread areas bite and contact, thereby reducing the volume difference between the two partitions, increasing the contact area of ​​the two functional treads, and enhancing the durability of the tire.

[0010] In some of these embodiments, the interface also includes a first fold point, a second fold point, and a third fold point located in the area below the first tread at the center of the crown, wherein the first fold point is located 2 mm above the bottom of the inner edge of the first tread, the second fold point is located 2 mm below the midpoint of the first tread, and the third fold point is located 2 mm above the bottom of the outer edge of the first tread.

[0011] In some of the embodiments, first V-shaped recesses are symmetrically arranged on both sides of the crown centerline, the outer side of the first V-shaped recesses is connected to the second tread, there are two interface surfaces in an eight-shaped structure, and the outer end points of the two interface surfaces are respectively located in the outer areas of the lowest points of the first V-shaped recesses on both sides of the crown centerline, the inner end points of the two interface surfaces are both located in the lower area of ​​the first tread at the crown centerline, and the distance m0 between the inner end points of the two interface surfaces and the length M of the first tread satisfy m0 / M=2 / 3, wherein the distance n2 from the outer end points of the two interface surfaces to the lowest point of the adjacent first V-shaped recess and the distance N from the lowest point of the first V-shaped recess to the inner end point of the adjacent second tread both satisfy n2 / N=(0.25~0.45):1, and the distance m3 from the inner end point of the interface located on the inner side of the crown centerline to the inner end point of the first tread and the distance m4 from the inner end point of the interface located on the outer side of the crown centerline to the outer end point of the first tread satisfy m3=m4=m0 / 4. By dividing the tread into three unequal parts, the compatibility of the rubber compound formulations of the left and right tread regions can be improved, and the required performance of the center area of ​​the tread can be achieved.

[0012] In some embodiments, the outer endpoints of the two interface surfaces are both located 2 mm above the outer bottom of the lowest point of the corresponding first V-shaped recess, and the inner endpoints of the two interface surfaces are both located 3 mm below the first tread.

[0013] In some of the embodiments, the inner end points of the two interface surfaces are both located 2 mm above the bottom of the first tread.

[0014] In some embodiments, the first V-shaped recess and the second V-shaped recess are symmetrically arranged on both sides of the crown centerline, the first tread is connected between the two adjacent first V-shaped recesses, the third tread is connected between the adjacent first V-shaped recess and the second V-shaped recess, and the outer side of the second V-shaped recess is connected to the third tread; wherein, the distance from the lowest point of the first V-shaped recess to the first tread is less than the distance from the lowest point of the first V-shaped recess to the second tread, and the distance from the lowest point of the second V-shaped recess to the second tread is equal to the distance from the lowest point of the second V-shaped recess to the third tread. This technical solution determines the thickness and shape of the corresponding grooves and pattern blocks at each position of the tread according to the longitudinal grooves and pattern blocks, reduces the influence of the flow rate of the rubber during the vulcanization process on the thickness of each part of the tire tread after vulcanization, can effectively solve the problems of rubber accumulation and uneven size, improves the uniformity of the tire, and reduces the production cost of the tire tread.

[0015] In some embodiments, the distance T1 from the lowest point of the first V-shaped recess to the center line of the crown satisfies T1=P1+(0.5-1.0), P1 represents the distance from the center line of the first V-shaped recess to the center line of the crown after the tire is vulcanized, in mm; the width Tw1 of the first V-shaped recess satisfies Tw1=G1×(1.3-1.7), G1 represents the width of the first V-shaped recess after the tire is vulcanized, in mm; the distance Tw1 from the lowest point of the first V-shaped recess to the first tread surface1L Meet Tw 1L =Tw1 / 2-1.5; the distance T2 from the lowest point of the second V-shaped concave to the center line of the crown satisfies T2=P2+(1-2), P2 represents the distance from the center line of the second V-shaped concave to the center line of the crown after the tire is vulcanized, in mm; the width Tw2 of the second V-shaped concave satisfies Tw2=G2×(1.3-1.7), G2 represents the width of the second V-shaped concave after the tire is vulcanized, in mm; the distance Tw2 from the lowest point of the second V-shaped concave to the second tread 2L , the distance Tw from the lowest point of the second V-shaped concave part to the third convex part 2R Meet Tw 2L =Tw 2R =Tw2 / 2.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] (1) The multifunctional tire tread of the present invention divides the tread into zones by using dividing lines of different positions and shapes, and selects the rubber compound formula according to the different performance requirements of different tread parts, so as to fully exert the function of the tire tread, break the limitation of the devil's triangle and meet the various performance requirements of the tire at the same time, improve the uniformity of the tire, reduce the production cost of the tire tread, and customize tires with different performance requirements by changing the formula within the zone.

[0018] (2) The tread of the multifunctional tire of the present invention determines the thickness and shape of the corresponding grooves and pattern blocks at each position of the tread according to the positions of the longitudinal grooves and pattern blocks, thereby reducing the influence of the flow rate of the rubber during the vulcanization process on the thickness of each part of the tire tread after vulcanization, and can effectively solve the problems of rubber accumulation and uneven size, thereby improving the uniformity of the tire and reducing the production cost of the tire tread. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of an embodiment of a multifunctional tire tread of the present invention;

[0021] Figure 2 A schematic structural diagram of one embodiment of the two-partition structure of the multifunctional tire tread of the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0023] Figure 4It is a structural schematic diagram of another embodiment of the two-partition structure of the multifunctional tire tread of the present invention;

[0024] Figure 5 for Figure 4 Enlarged view of middle part B;

[0025] Figure 6 It is a structural schematic diagram of another embodiment of the two-partition structure of the multifunctional tire tread of the present invention;

[0026] Figure 7 for Figure 6 Enlarged view of middle C;

[0027] Figure 8 It is a structural schematic diagram of one embodiment of the three-unequal partition structure of the multifunctional tire tread of the present invention;

[0028] Fig. 9 for Figure 8 Enlarged view of the middle D part;

[0029] Fig.10 It is a structural schematic diagram of another embodiment of the three-unequal partition structure of the multifunctional tire tread of the present invention;

[0030] Fig.11 for Fig.10 Enlarged view of middle E part;

[0031] Fig.12 A tread mouth design diagram of a multifunctional tire tread embodiment of the present invention;

[0032] Fig.13 A schematic diagram of a target pattern mold of a multifunctional tire tread embodiment of the present invention;

[0033] In the figure: 1, first tread, 2, first V-shaped recess, 3, second tread, 4, second V-shaped recess, 5, third tread;

[0034] A1, the lower endpoint of the first interface, A2, the upper endpoint of the first interface;

[0035] B1, the lower endpoint of the second interface, B2, the upper endpoint of the second interface;

[0036] C1, the lower endpoint of the third interface, C2, the upper endpoint of the third interface, C3, the first inflection point of the third interface, C4, the second inflection point of the third interface, C5, the third inflection point of the third interface;

[0037] D1, the lower endpoint of the fourth interface, D2, the upper endpoint of the fourth interface, D3, the upper endpoint of the fifth interface, D4, the lower endpoint of the fifth interface;

[0038] E1, the upper endpoint of the sixth interface, E2, the lower endpoint of the sixth interface, E3, the lower endpoint of the seventh interface, E4, the upper endpoint of the seventh interface. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0041] The present invention provides a multifunctional tire tread, which is suitable for asymmetric pattern tires of new energy vehicles, and is particularly suitable for asymmetric pattern tires with four longitudinal main grooves on the tread. According to the pattern style and tire performance requirements, the tread is divided into zones by using dividing lines of different positions and shapes, and the rubber compound formula is selected according to the different performance requirements of different tread parts, so as to fully play the role of the tire tread, break the limitation of the devil's triangle and meet the various performance requirements of the tire at the same time, and customize tires with different performance requirements by changing the formula in the zone.

[0042] Reference Figure 1 As shown, the tread of the multifunctional tire of the present invention comprises a plurality of tread areas divided by at least one interface located below the central area of ​​the tread crown, and the plurality of tread areas are used for filling with different types of rubber compounds.

[0043] Reference Figure 2 and attached Figure 3As shown, it is one of the embodiments of the present invention. In this embodiment, both ends of the interface are located in the lower area of ​​the first tread 1 at the center of the crown, forming a first interface. The first interface divides the tire tread into two tread areas of equal volume. The tread area located on the inner side is filled with a tread formula with excellent anti-skid performance, and the tread area located on the outer side is filled with a tread formula with excellent wear resistance and grip, forming a left and right structure multifunctional partitioned tread. The distance from the lower end point A1 of the first interface to the bottom of the tread is less than the distance from the upper end point A2 of the first interface to the bottom of the tread. The horizontal length m of the first interface and the length M of the first tread 1 satisfy m / M=2 / 3. The distance m1 from the lower end point A1 of the first interface to the inner end point of the first tread and the distance m2 from the upper end point A2 of the first interface to the outer end point of the first tread 1 satisfy m1=m2=m / 4. The embodiment of the present invention places the interface in the center area of ​​the crown. Since the center area of ​​the crown contacts the mold first during the vulcanization process, the expansion of the vulcanization bladder after inflation and the compression deformation from the mold are relatively small, which can reduce the adverse effects of rubber flow on the contact surface of the rubber formula of the first tread area and the second tread area during the vulcanization process, such as stratification. During the use of the tire, the center area of ​​the crown contacts the ground first, and most of the force applied to the center area of ​​the crown is in the centripetal direction, while the lateral force applied to the center area of ​​the crown is relatively small. Therefore, the lateral tensile deformation of the center area of ​​the crown is smaller than that of the shoulder area, and the impact on the interface is minimal.

[0044] Reference Figure 4 and attached Figure 5 As shown, the first V-shaped recess 2 is symmetrically arranged on both sides of the crown centerline, and the outer side of the first V-shaped recess 2 is connected to the second tread 3. The two ends of the interface are respectively located in the outer areas of the lowest point of the first V-shaped recess 2 on both sides of the crown centerline, forming a second interface. The first interface divides the tire tread into two tread areas with different volumes. The distance from the lower end point B1 of the second interface to the bottom of the tread is smaller than the distance from the upper end point B2 of the second interface to the bottom of the tread. The distance n1 from the two end points of the second interface to the lowest point of the adjacent first V-shaped recess 2 and the distance N from the lowest point of the first V-shaped recess 2 to the inner end point of the adjacent second tread 3 satisfy n1 / N=(0.25~0.45):1. The above-mentioned partition arrangement in this embodiment increases the horizontal length of the second interface. On the one hand, it is beneficial to increase the contact area between the two rubber materials of different formulations in the tread area on both sides of the interface and reduce the possibility of delamination. On the other hand, during the running of the tire, the pressure on the bottom of the groove is relatively small compared with the tread blocks that directly contact the ground, so that the contact surface force of the two rubber materials of different formulations in the tread area on both sides of the interface is small, which is more conducive to the stability of the interface between the two functional partition areas of the tread.

[0045] In a preferred embodiment, the interface is a sawtooth structure, and the two ends of the interface are respectively located at the outer areas of the lowest point of the first V-shaped concave portion 2 on both sides of the crown centerline, forming a third interface, and the third interface divides the tire tread into two tread areas of equal volume. Figure 6 He Ru Figure 7 As shown, the embodiment of the present invention adopts a serrated interface to make the two tread areas bite and contact, thereby reducing the volume difference between the two partitions, especially the volume difference between the tread areas on both sides of the interface with a large difference in specific gravity, and also increasing the contact area of ​​the two functional treads, maintaining the stability of the interface between the two functional partitions in the tread area, and enhancing the durability of the tire. The third interface of the serrated structure also includes a first folding point C3, a second folding point C4 and a third folding point C5 located in the area below the first tread 1, wherein the first folding point C3 is located 2 mm above the bottom surface of the inner edge of the first tread 1, the second folding point C4 is located 2 mm below the midpoint of the first tread 1, and the third folding point C5 is located 2 mm above the bottom surface of the outer edge of the first tread 1.

[0046] Reference Figure 8 -Attached Fig.11 As shown, in order to improve the compatibility of two formulations with different performances when they are directly combined, achieve the performance required in the center area of ​​the tread, and reduce the stress concentration on the contact surface caused by tread deformation, there are two interfaces in an eight-shaped structure, and the rubber material in the tread area between the two eight-shaped interfaces is obtained by a stable trapezoidal extrusion method. The outer end points of the two interfaces are respectively located in the outer areas of the lowest point of the first V-shaped recess 2 on both sides of the crown centerline, and the inner end points of the two interfaces are both located in the lower area of ​​the first tread 1 at the crown centerline, and the distance m0 between the inner end points of the two interfaces and the length M of the first tread 1 satisfy m0 / M=2 / 3, wherein the distance n2 from the outer end points of the two interfaces to the lowest point of the adjacent first V-shaped recess 2 and the distance N from the lowest point of the first V-shaped recess 2 to the inner end point of the adjacent second tread 3 both satisfy n2 / N=(0.25~0.45):1, and the distance m3 from the inner end point of the interface located on the inner side of the crown centerline to the inner end point of the first tread 1 and the distance m4 from the inner end point of the interface located on the outer side of the crown centerline to the outer end point of the first tread 1 satisfy m3=m4=m0 / 4.

[0047] Reference Figure 8 -Attached Fig. 9As shown, the two interfaces are in a regular figure eight structure, the outer endpoints of the two interfaces are both located 2mm above the outer bottom of the lowest point of the corresponding first V-shaped recess 2, and the inner endpoints of the two interfaces are both located 3mm below the first tread 1. The two interfaces include a fourth interface and a fifth interface, the outer endpoint D1 of the fourth interface is located in the outer area of ​​the lowest point of the first V-shaped recess 2 inside the crown centerline, and the outer endpoint D4 of the fifth interface is located in the outer area of ​​the lowest point of the first V-shaped recess 2 outside the crown centerline; the inner endpoint D2 of the fourth interface and the inner endpoint D3 of the fifth interface are both located in the lower area of ​​the first tread 1 at the crown centerline, and the distance m0 between the inner endpoint D2 of the fourth interface and the inner endpoint D3 of the fifth interface and the length M of the first tread 1 satisfy m0 / M=2 / 3, wherein the distance n2 from the outer end point D1 of the fourth dividing interface and the outer end point D4 of the fifth dividing interface to the lowest point of the adjacent first V-shaped recess 2 and the distance N from the lowest point of the first V-shaped recess 2 to the inner end point of the adjacent second tread 3 both satisfy n2 / N=(0.25~0.45):1, and the distance m3 from the inner end point D2 of the fourth dividing interface located on the inner side of the crown centerline to the inner end point of the first tread 1 and the distance m4 from the inner end point D3 of the fifth dividing interface located on the outer side of the crown centerline to the outer end point of the first tread 1 satisfy m3=m4=m0 / 4.

[0048] Reference Fig.10 -Attached Fig.11 As shown, since the crown platform contacts the ground first, and the closer it is to the top of the platform, the more likely it is to be stressed, causing greater deformation and easily causing delamination, the embodiment of the present invention sets the two interfaces to an inverted eight-shaped structure to reduce the stress on the crown and maintain the stability of the interface, wherein the inner endpoints of the two interfaces are both located 2 mm above the bottom of the first tread 1, and the distance from the outer endpoints of the two interfaces to the bottom of the tread is greater than the distance from the inner endpoints of the two interfaces to the bottom of the tread. The two interfaces include a sixth interface and a seventh interface, wherein the outer endpoint E1 of the sixth interface is located in the outer region of the lowest point of the first V-shaped recess 2 on the inner side of the crown centerline, and the outer endpoint E4 of the seventh interface is located in the outer region of the lowest point of the first V-shaped recess 2 on the outer side of the crown centerline; the inner endpoint E2 of the sixth interface and the inner endpoint E3 of the seventh interface are both located in the lower region of the first tread 1 at the crown centerline, and the distance m0 between the inner endpoint E2 of the sixth interface and the inner endpoint E3 of the seventh interface and the length M of the first tread 1 satisfy m0 / M =2 / 3, wherein the distance n2 from the outer end point E1 of the sixth dividing interface and the outer end point E4 of the seventh dividing interface to the lowest point of the adjacent first V-shaped recess 2 and the distance N from the lowest point of the first V-shaped recess 2 to the inner end point of the adjacent second tread 3 both satisfy n2 / N=(0.25~0.45):1, the distance m3 from the inner end point E2 of the sixth dividing interface located on the inner side of the crown centerline to the inner end point of the first tread 1 and the distance m4 from the inner end point E3 of the seventh dividing interface located on the outer side of the crown centerline to the outer end point of the first tread 1 satisfy m3=m4=m0 / 4.

[0049] refer to Figure 1 and Fig.12 As shown, the first V-shaped recess 2 and the second V-shaped recess 4 are symmetrically arranged on both sides of the crown center line of the tread of the multifunctional tire of the present invention, a first tread 1 is arranged between two adjacent first V-shaped recesses 2, a third tread 5 is arranged between adjacent first V-shaped recesses 2 and second V-shaped recesses 4, and the outer side of the second V-shaped recess 4 is connected to the third tread 5; after the tire vulcanization mold is closed, the vulcanization bladder expands, because the side of the first V-shaped recess 2 close to the tread center contacts the mold earlier than the other side of the first V-shaped recess 2 far from the tread center, the deformation of the side of the first V-shaped recess 2 close to the tread center is smaller than the deformation of the side far from the tread center, the distance from the lowest point of the first V-shaped recess 2 closest to the crown center line to the first tread 1 is smaller than the distance from the lowest point of the first V-shaped recess 2 to the second tread 3; the distance from the lowest point of the second V-shaped recess 4 to the second tread 3 is equal to the distance from the lowest point of the second V-shaped recess 4 to the third tread 5. In a preferred embodiment, the distance T1 from the lowest point of the first V-shaped recess 2 to the center line of the crown satisfies T1=P1+(0.5-1.0), P1 represents the distance from the center line of the first V-shaped recess 2 to the center line of the crown after the tire is vulcanized, and the unit is mm; the width Tw1 of the first V-shaped recess 2 satisfies Tw1=G1×(1.3-1.7), G1 represents the width of the first V-shaped recess 2 after the tire is vulcanized, and its value is determined according to the expansion coefficient of the rubber compound and the flow properties of the rubber compound, and the unit is mm; the distance Tw1 from the lowest point of the first V-shaped recess 2 to the first tread 1 1L Meet Tw 1L =Tw1 / 2-1.5; the distance T2 from the lowest point of the second V-shaped recess 4 to the center line of the crown satisfies T2=P2+(1-2), P2 represents the distance from the center line of the second V-shaped recess 4 to the center line of the crown after the tire is vulcanized, in mm; the width Tw2 of the second V-shaped recess 4 satisfies Tw2=G2×(1.3-1.7), G2 represents the width of the second V-shaped recess 4 after the tire is vulcanized, in mm; the distance Tw2 from the lowest point of the second V-shaped recess 4 to the second tread 3 2L , the distance Tw from the lowest point of the second V-shaped concave portion 4 to the third convex portion 2R Meet Tw 2L =Tw 2R =Tw2 / 2. The multifunctional tire tread of the present invention determines the thickness and shape of the corresponding grooves and pattern blocks at each position of the tread according to the longitudinal grooves and pattern blocks, thereby reducing the influence of the flow rate of the rubber material during the vulcanization process on the thickness of each part of the tire tread after vulcanization, effectively solving the problems of rubber material accumulation and uneven size, reducing the production cost of the tire tread, and improving the uniformity of the tire.

[0050] The multifunctional tire tread of the present invention has a difference of 0.5-1.0 mm in distance from the lowest point of the first V-shaped concave portion 2 to the center line of the tread crown before and after vulcanization, and a difference of 1-2 mm in distance from the lowest point of the second V-shaped concave portion 4 to the center line of the tread crown before and after vulcanization. The reason for adopting this structural design is that during the vulcanization process of the rubber material, there will be a phenomenon of gathering and flowing toward the middle. Fig.12 As shown in the tread mouth design diagram, the present invention designs the crown mouth shape according to the groove position of the tire pattern diagram, and the distance from the lowest point of the V-shaped concave part to the crown center line is different by a certain size, so that after the tire is vulcanized, the groove of the tread mouth shape can correspond to the groove on the tire mold, avoiding the phenomenon of lack of rubber or accumulation of rubber, and the bottom of the groove just corresponds to the groove position of the tire mold, and the attached Fig.13 The tread pattern shown is the tread pattern after the tire is vulcanized.

[0051] In order to more clearly and in detail introduce the multifunctional tire tread provided by the embodiment of the present invention, it will be described below in conjunction with specific embodiments.

[0052] Embodiment 1-embodiment 6 selects the new energy tire specification 235 / 45R18 98W, respectively according to the attached Figure 1 , Attachment Figure 2 , Attachment Figure 4 , Attachment Figure 6 , Attachment Figure 8 , Attachment Fig.10 The tread structure shown in is prepared by the same method, wherein the left and right tread areas of Example 1 adopt the same excellent formula for anti-wet skid performance, the left tread area of ​​Examples 2-4 (corresponding to the inner side of the tire) adopts an excellent formula for anti-wet skid performance, and the right tread area (corresponding to the outer side of the tire) adopts an excellent formula for grip performance; the left tread area of ​​Examples 5-6 (corresponding to the inner side of the tire) adopts an excellent formula for anti-wet skid performance, the right tread area (corresponding to the outer side of the tire) adopts an excellent formula for grip performance, and the middle tread area adopts a rubber transition formula. The obtained tires were tested for high-speed performance, durability, dry and wet braking distance, and wet handling performance. The test results are shown in Table 1. After the dry braking distance and wet braking distance tests were completed, the corresponding index of the test result of the optimal Example 6 was set to 100, and the test results of other examples were converted to obtain the results shown in Table 1.

[0053] Table 1 Tire performance test table of Examples 1-6

[0054]

[0055]

[0056] As can be seen from the above, Examples 1-6 use different tread structures, and the high-speed and durability results have reached the enterprise standard. Examples 4 and 6 have the best high-speed performance and wet braking distance; Example 6 has the best wet handling performance. Examples 1-6 use the technical solution of the present invention, and the tires obtained have good high-speed performance and durability, and can take into account wet and grip performance.

[0057] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A multifunctional tire tread, characterized in that: The tire comprises a plurality of tread areas divided by at least one interface located below a crown center area, wherein the plurality of tread areas are used for filling with different types of rubber materials.

2. The multifunctional tire tread according to claim 1, characterized in that: Both ends of the interface are located in the area below the first tread at the center of the crown, and the distance from the lower end point of the interface to the bottom of the tread is smaller than the distance from the upper end point of the interface to the bottom of the tread, the horizontal length m of the interface and the length M of the first tread satisfy m / M=2 / 3, the distance m1 from the lower end point of the interface to the inner end point of the first tread and the distance m2 from the upper end point of the interface to the outer end point of the first tread satisfy m1=m2=m / 4.

3. The multifunctional tire tread according to claim 1, characterized in that: The first V-shaped recess is symmetrically arranged on both sides of the crown centerline, and the outer side of the first V-shaped recess is connected to the second tread. The two ends of the interface are respectively located at the outer areas of the lowest point of the first V-shaped recess on both sides of the crown centerline, and the distance from the lower end point of the interface to the bottom of the tread is smaller than the distance from the upper end point of the interface to the bottom of the tread. The distance n1 from the two end points of the interface to the lowest point of the adjacent first V-shaped recess and the distance N from the lowest point of the first V-shaped recess to the inner end point of the adjacent second tread satisfy n1 / N=(0.25~0.45):

1.

4. The multifunctional tire tread according to claim 3, characterized in that: The interface is a zigzag structure, and the interface divides the tire tread into two tread areas of equal volume.

5. The multifunctional tire tread according to claim 4, characterized in that: The interface also includes a first fold point, a second fold point and a third fold point located in the area below the first tread at the center of the crown, wherein the first fold point is located 2 mm above the bottom of the inner edge of the first tread, the second fold point is located 2 mm below the midpoint of the first tread, and the third fold point is located 2 mm above the bottom of the outer edge of the first tread.

6. The multifunctional tire tread according to claim 1, characterized in that: A first V-shaped recess is symmetrically arranged on both sides of the crown centerline, and the outer side of the first V-shaped recess is connected to the second tread. There are two interface surfaces in an eight-shaped structure, and the outer end points of the two interface surfaces are respectively located in the outer areas of the lowest points of the first V-shaped recesses on both sides of the crown centerline, and the inner end points of the two interface surfaces are both located in the lower area of ​​the first tread at the crown centerline, and the distance m0 between the inner end points of the two interface surfaces and the length M of the first tread satisfy m0 / M=2 / 3, wherein the distance n2 from the outer end points of the two interface surfaces to the lowest point of the adjacent first V-shaped recess and the distance N from the lowest point of the first V-shaped recess to the inner end point of the adjacent second tread both satisfy n2 / N=(0.25~0.45):1, and the distance m3 from the inner end point of the interface located on the inner side of the crown centerline to the inner end point of the first tread and the distance m4 from the inner end point of the interface located on the outer side of the crown centerline to the outer end point of the first tread satisfy m3=m4=m0 / 4.

7. The multifunctional tire tread according to claim 6, characterized in that: The outer end points of the two interfaces are both located 2 mm above the outer bottom of the lowest point of the corresponding first V-shaped recess, and the inner end points of the two interfaces are both located 3 mm below the first tread.

8. The multifunctional tire tread according to claim 6, characterized in that: The inner end points of the two interfaces are both located 2 mm above the bottom of the first tread.

9. The multifunctional tire tread according to any one of claims 1 to 8, characterized in that: A first V-shaped recess and a second V-shaped recess are symmetrically arranged on both sides of the crown centerline, the first tread is connected between two adjacent first V-shaped recesses, the third tread is connected between adjacent first V-shaped recesses and second V-shaped recesses, and the outer side of the second V-shaped recess is connected to the third tread; wherein, The distance from the lowest point of the first V-shaped recess to the first tread is smaller than the distance from the lowest point of the first V-shaped recess to the second tread, and the distance from the lowest point of the second V-shaped recess to the second tread is equal to the distance from the lowest point of the second V-shaped recess to the third tread.

10. The multifunctional tire tread according to claim 9, characterized in that: The distance T1 from the lowest point of the first V-shaped concave portion to the centerline of the crown satisfies T1=P1+(0.5-1.0), where P1 represents the distance from the centerline of the first V-shaped concave portion to the centerline of the crown after the tire is vulcanized, in mm; The width Tw1 of the first V-shaped concave portion satisfies Tw1=G1×(1.3-1.7), where G1 represents the width of the first V-shaped concave portion after the tire is vulcanized, in mm; the distance Tw1 from the lowest point of the first V-shaped concave portion to the first tread is 1L Meet Tw 1L =Tw1 / 2-1.5; The distance T2 from the lowest point of the second V-shaped concave portion to the centerline of the crown satisfies T2=P2+(1-2), where P2 represents the distance from the centerline of the second V-shaped concave portion to the centerline of the crown after the tire is vulcanized, in mm; The width Tw2 of the second V-shaped concave portion satisfies Tw2=G2×(1.3-1.7), where G2 represents the width of the second V-shaped concave portion after the tire is vulcanized, in mm; The distance Tw from the lowest point of the second V-shaped recess to the second tread 2L , the distance Tw from the lowest point of the second V-shaped concave part to the third convex part 2R Meet Tw 2L =Tw 2R =Tw2 / 2.

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