A tire tread pattern structure and a tire for high wet grip motorcycles

Abstract

The present invention provides a tread pattern structure of a tire and a tire for a motorcycle with high wet grip. The pattern structure includes a plurality of tread groove portions arranged circumferentially along the tire and symmetrically disposed with respect to the tread center line. Each tread groove portion has an inclined tread groove group and a gear disc group. The inclined tread groove group includes a plurality of tread grooves arranged at intervals in the circumferential direction of the tire, and the plurality of tread grooves extend obliquely from the tread center line towards the ground contact side behind the tire shoulder. Along the axial direction of the tire, the lengths of the plurality of tread grooves gradually increase first and then gradually decrease. The gear disc group includes a central hole, an inner gear disc, and an outer gear disc that are concentrically arranged. At least four tooth grooves are provided on both the inner gear disc and the outer gear disc, and each tooth groove on the outer gear disc communicates with a tread groove. Thus, rapid drainage of the tire at different inclination angles can be ensured, and excellent wet grip performance can be exerted without affecting the handling and comfort performance.

Description

Technical Field

[0001] The present invention relates to the technical field of tires, in particular to a tire tread pattern structure and a pneumatic tire for a high-wet grip motorcycle having the pattern structure. Background Art

[0002] With the continuous changes in the motorcycle market and the continuous improvement of road conditions, consumers are demanding that scooter tires can be used in both sunny and rainy days, especially in wetland drainage and grip performance in rainy days. Figure 1 , a traditional rain or shine tire has a tread 1' provided with a central straight groove 10' and a side groove group 20'. The side groove group 20' comprises a long groove 21', a short groove 22', a suction cup 23' and a single thin groove 24'. The suction cup 23' and the single thin groove 24' are connected to the short groove 22' to ensure the drainage performance of the tire; however, because its center is a straight groove design, the pattern groove is easily stretched after inflation, affecting its straight running comfort performance. In addition, when the rainfall is heavy, the relatively independent design of the central straight groove 10' and the side groove group 20' makes it impossible to introduce the central water flow into the side groove, and the suction cup 23' cannot drive the water flow to be discharged into the thin groove and the main groove, so the effect of rapid drainage cannot be achieved. Its wet grip performance is also poor and needs to be improved. Summary of the Invention

[0003] Based on the above problems, the first purpose of the present invention is to propose a tire tread pattern structure that can ensure rapid drainage of the tire at different inclination angles, while not affecting the handling and comfort performance while exerting excellent wet grip performance.

[0004] A second object of the present invention is to provide a tire for motorcycles with high wet grip.

[0005] To achieve the above objectives, a first embodiment of the present invention provides a tire tread pattern structure, comprising a plurality of groove portions arranged along the tire circumference and symmetrically arranged about the tread centerline, each of the groove portions comprising an inclined groove group and a gear plate group;

[0006] The inclined groove group includes a plurality of grooves spaced apart along the circumferential direction of the tire, and the plurality of grooves extend obliquely from the tread centerline toward the ground contact side behind the shoulder; along the axial direction of the tire, the lengths of the plurality of grooves gradually increase and then gradually decrease;

[0007] The gear plate assembly includes a concentrically arranged center hole, an inner gear plate and an outer gear plate. The inner gear plate and the outer gear plate are each provided with at least four tooth grooves, and each tooth groove on the outer gear plate is connected to one of the tread grooves.

[0008] According to the tread pattern structure of the embodiment of the present invention, by inclining several tread grooves in the inclined groove group to extend obliquely from the tread center line towards the grounding side of the shoulder, and along the axial direction of the tire, the lengths of several tread grooves gradually become longer first and then gradually become shorter, it can ensure the drainage of the tire at different angles, improve the straight-line grip performance, ensure the rigidity of the shoulder pattern, and improve the cornering grip performance of the tire; in addition, in the gear disc group, for the inner gear disc and the outer gear disc, the tooth grooves of the outer gear disc are communicated with the tread grooves, and the tooth grooves of the inner and outer gear discs can be used to drive the water flow to each tread groove and discharge it to the outside, driving the rapid drainage of the tire at various angles and effectively improving the wet grip performance.

[0009] In addition, the tread pattern structure of the tire proposed according to the above embodiment of the present invention further has the following additional technical features:

[0010] Optionally, the length variations of several tread grooves in the inclined groove group are alternately arranged; the lengths of two adjacent tread grooves in the inclined groove group are inconsistent.

[0011] Furthermore, along the axial direction of the tire and from near the tread center line to the shoulder, there are at least two tread grooves whose lengths gradually become longer first, and at least two tread grooves whose lengths gradually become shorter.

[0012] Furthermore, from the tread center line to the shoulder, the inclined groove group includes a first tread groove, a second tread groove, a third tread groove, a fourth tread groove, a fifth tread groove, a sixth tread groove, and a seventh tread groove. The lengths of the first tread groove to the third tread groove gradually become longer, and the lengths of the third tread groove to the seventh tread groove gradually become shorter.

[0013] Furthermore, the angle between the first tread groove and the tread center line is 5° - 15°, and the angles between the second tread groove, the third tread groove, the fourth tread groove, the fifth tread groove, the sixth tread groove, and the seventh tread groove and the tread center line are all 30° - 50°.

[0014] Optionally, the depth of the tooth grooves of the inner gear disc is less than the depth of the tooth grooves of the outer gear disc.

[0015] Optionally, the tread groove part further includes a fine groove group arranged near the tread center line. The fine groove group is a multi-fold groove structure, and two adjacent fine groove groups are mirror images that are inverted and staggered with respect to the tread center line.

[0016] Furthermore, the fine groove group includes a vertical groove, a first inclined groove, a second inclined groove, and a third inclined groove that are sequentially communicated. The vertical groove is parallel to the tread center line, and the third inclined groove is connected to the tread center line.

[0017] To achieve the above object, an embodiment of the second aspect of the present invention provides a tire for a high-wet-grip motorcycle, which includes the above-mentioned tire tread pattern structure.

[0018] According to the embodiment of the present invention, the tire for a high-wet-grip motorcycle can ensure rapid drainage at different tire cambers through the optimized design of the tire tread pattern structure, and can exhibit excellent wet grip performance without affecting the handling and comfort performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the tire tread pattern structure of the prior art;

[0020] Figure 2 Schematic diagram of a partial tread pattern structure of a tire according to an embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the tire tread pattern structure according to an embodiment of the present invention;

[0022] Figure 4 is Figure 3 a partial enlarged view;

[0023] Figure 5 is Figure 3 an enlarged sectional view taken along line A-A' in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] It should be noted that in the present invention, Figures 1 to 5 in, the transverse direction is defined as the tire axial direction, the longitudinal direction is the tire circumferential direction, CL is the tread center line, the side close to the tread center line CL is the axial inner side, the side far from the tread center line CL is the axial outer side, the side in the same direction as the driving direction is the front grounding side, the side in the opposite direction to the driving direction is the rear grounding side, and the arrow indicates the tire driving direction. The above terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements of the present invention must have a specific orientation, and thus should not be construed as limiting the present invention.

[0026] To better understand the above technical solution, the exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0027] The following refers to Figures 2 to 5 Describe the tire tread pattern structure of the embodiments of the present invention.

[0028] As Figure 2 and Figure 3 shown, according to the tire tread pattern structure of the embodiments of the present invention, the tire tread 1 includes a plurality of tread groove portions arranged along the tire circumference and symmetrically disposed with respect to the tread center line. Each tread groove portion has an inclined tread groove group 10 and a gear disc group 20, and the left and right tread patterns are symmetrically arranged.

[0029] Specifically, the inclined tread groove group 10 includes a plurality of tread grooves arranged at intervals along the tire circumference. The plurality of tread grooves extend obliquely from the tread center line CL towards the grounding side behind the tire shoulder; in the tire axial direction, the lengths of the plurality of tread grooves first gradually increase and then gradually decrease. It can be understood that from the tread center line CL to the tire shoulder or from the tire shoulder to the tread center line CL, the lengths of the plurality of tread grooves first gradually increase and then gradually decrease.

[0030] The gear disc group 20 includes a central hole 21, an inner gear disc 22, and an outer gear disc 23 that are concentrically arranged. At least four tooth grooves are provided on both the inner gear disc 22 and the outer gear disc 23, and each tooth groove on the outer gear disc 23 communicates with a tread groove. That is to say, the inner gear disc 22 can discharge water to the outer gear disc 23 through the tooth grooves, and the outer gear disc 23 can discharge water to the tread groove through the tooth grooves.

[0031] Thus, according to the tire tread pattern structure of the embodiments of the present invention, by the plurality of tread grooves in the inclined tread groove group 10 extending obliquely from the tread center line CL towards the grounding side behind the tire shoulder, and in the tire axial direction, the lengths of the plurality of tread grooves first gradually increase and then gradually decrease, it can ensure the drainage of the tire at different angles, improve the straight-line grip performance, and the lengths of the plurality of tread grooves located at the tire shoulder gradually increase from the tire shoulder to the tread center line CL, which can ensure the rigidity of the shoulder pattern and improve the cornering grip performance of the tire; in addition, through the gear disc group 20, the inner gear disc 22 and the outer gear disc 23, the tooth grooves of the outer gear disc 23 communicate with the tread grooves, and the tooth grooves of the inner and outer gear discs can be used to drive the water flow to each tread groove and discharge it outward, driving the rapid drainage of the tire at various angles and effectively improving the wet grip performance.

[0032] In some examples, the lengths of several tread grooves in the inclined tread groove group 10 are alternately arranged in a variable pattern, thereby further ensuring the drainage of the tire at different angles. Specifically, the lengths of two adjacent tread grooves in the inclined tread groove group 10 are inconsistent.

[0033] In some examples, along the axial direction of the tire and from near the tread center line CL to the tire shoulder, there are at least two tread grooves whose lengths gradually increase first. These tread grooves extend from the tread center line CL towards the tire shoulder and are designed to gradually increase in length in sequence from the rear contact side to the front contact side. Each groove is alternately designed with a variable length pattern, which can ensure the drainage of the tire at different angles and improve the straight-line grip performance; there are also at least two tread grooves whose lengths gradually decrease. These tread grooves all extend from near the tread center line CL towards the tire shoulder and are designed to gradually decrease in length in sequence from the rear contact side to the front contact side, which can ensure the rigidity of the shoulder tread pattern. Additionally, each groove is alternately designed with a variable pattern, which can ensure the drainage at different angles and improve the cornering grip performance of the tire.

[0034] Specifically, in combination with Figure 2 , from the tread center line CL to the tire shoulder, the inclined tread groove group 10 includes a first tread groove 11, a second tread groove 12, a third tread groove 13, a fourth tread groove 14, a fifth tread groove 15, a sixth tread groove 16, and a seventh tread groove 17. The lengths of the first tread groove 11 to the third tread groove 13 gradually increase, and the lengths of the third tread groove 13 to the seventh tread groove 17 gradually decrease. The lengths of the first tread groove 11, the second tread groove 12, and the third tread groove 13 are different. Each groove is alternately designed with a variable length pattern, which can ensure the drainage of the tire at different angles and improve the straight-line grip performance; the lengths of the third tread groove 13, the fourth tread groove 14, the fifth tread groove 15, the sixth tread groove 16, and the seventh tread groove 17 are different, which can ensure the rigidity of the shoulder tread pattern. Additionally, each groove is alternately designed with a variable pattern, which can ensure the drainage at different angles and improve the cornering grip performance. Moreover, the first tread groove 11, the second tread groove 12, the third tread groove 13, the fourth tread groove 14, the fifth tread groove 15, the sixth tread groove 16, and the seventh tread groove 17 are arranged in parallel with each other, making the overall tread drainage performance better.

[0035] Furthermore, the angle α between the first tread groove 11 and the tread center line CL is 5° to 15°, and the angles β between the second tread groove 12, the third tread groove 13, the fourth tread groove 14, the fifth tread groove 15, the sixth tread groove 16, and the seventh tread groove 17 and the tread center line CL are all 30° to 50°, thereby ensuring the drainage performance of each tread groove.

[0036] In addition, the ends of each tread groove are all designed to be pointed, and some tread grooves are also provided with corners to enhance the edge component of the tread pattern.

[0037] In combination with Figure 3 and Figure 4, the tooth grooves on the outer gear disc 23 in each tread groove part communicate with the tread grooves in the tread groove part, so as to optimize the drainage performance of each tread groove.

[0038] Specifically, both the inner gear disc 22 and the outer gear disc 23 are configured with six tooth grooves. Among them, four tooth grooves communicate with the third tread groove 13, the fourth tread groove 14, the fifth tread groove 15, and the sixth tread groove 16 in one-to-one correspondence, and the other two tooth grooves communicate with the first tread groove 11 and the second tread groove 12 in the adjacent inclined tread group in one-to-one correspondence. Thus, a disc in the shape of a flying wheel is formed. Among them, the tooth grooves and the tread grooves can be communicated through fine grooves. For example, in this embodiment, the outer gear disc 23 includes six tooth grooves 23a, 23b, 23c, 23d, 23e, 23f. Among them, the tooth groove 23c is connected to the front end of the third tread groove 13, the tooth groove 23b is connected to the tail end of the second tread groove 12, the tooth groove 23a is connected to the front end of the first tread groove 11, the tooth groove 23d is connected to the front end of the fourth tread groove 14, the tooth groove 23e is connected to the front end of the fifth tread groove 15, and the tooth groove 23f is connected to the front end of the sixth tread groove 16. After the inner and outer gear discs are connected to the respective tread grooves, a disc in the shape of a flying wheel is formed, which can drive the water flow in each tread groove to communicate with each other, effectively break the water film, and effectively improve the drainage performance and wetland grip performance of the tire.

[0039] Among them, the depth of the tooth grooves of the inner gear disc 22 is less than the depth of the tooth grooves of the outer gear disc 23. Specifically, the radius R1 of the central circular hole 21 is set to 1 mm to 3 mm, the radius R2 of the inner gear disc 22 is 4 mm to 6 mm, the radius R3 of the outer gear disc 23 is 6 mm to 10 mm, the width W1 of the tooth grooves of the inner gear disc 22 and the outer gear disc 23 is set to 1 mm - 3.5 mm, the depth h1 of the inner gear disc 22 towards the central circular hole 31 is set to 1 mm to 3.5 mm, the distance h2 between the inner gear disc 22 and the outer gear disc 23 is set to 1 mm to 3.5 mm, and the depth h3 of the tooth groove 22a of the inner gear disc 22 is less than the depth h4 of the tooth groove 23a (23b, 23c, 23d, 23e, 23f) of the outer gear disc 23. The design of the gear discs with gradually increasing sizes and the tooth grooves with gradually increasing depths can be used to enhance the edge components of the tread, effectively break the water film and drive the drainage to be discharged to each main groove, improve the drainage ability of the tire, and exert excellent wetland grip performance of the tire.

[0040] In some examples, the tread groove part further includes a fine groove group 30 arranged adjacent to the tread center line. The fine groove group 30 is a multi-fold groove structure, and two adjacent fine groove groups 30 are mirror-imaged and staggered in an inverted manner with the tread center line CL as the axis. That is to say, the two fine groove groups 30 located on both sides of the tread center line CL are mirror-symmetrical and then inverted and staggered. Thus, the central water film can be effectively broken through the fine groove group 30, and the straight-line drainage and grip performance are further improved.

[0041] Specifically, the rill group 30 includes a vertical groove 31, a first inclined groove 32, a second inclined groove 33, and a third inclined groove 34 that are sequentially connected. The vertical groove 31 is parallel to the tread center line CL, and the third inclined groove 34 is connected to the tread center line CL.

[0042] Using the technology of the present application, a tire with a size of 120 / 70-12 is manufactured and installed on a scooter model. The tire is filled with a wind pressure of 225 kPa and tested on a cement and asphalt wet road surface. Through the actual vehicle test by the driver, it is evaluated that the tire handling stability, comfort, and wet grip performance of the embodiments are better than those of the previous examples.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as a limitation of the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0047] In the description of the present specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the present specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in the present specification.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tire tread pattern structure, characterized in that, It includes a plurality of tread groove parts arranged circumferentially along the tire and symmetrically disposed with respect to the tread center line. Each of the tread groove parts has an inclined tread groove group and a gear disc group; the inclined tread groove group includes a plurality of tread grooves arranged at intervals circumferentially along the tire, and the plurality of tread grooves extend obliquely from the tread center line towards the ground contact side of the tire shoulder; in the axial direction of the tire, the lengths of the plurality of tread grooves first gradually increase and then gradually decrease; the gear disc group includes a central hole, an inner gear disc and an outer gear disc arranged concentrically, and at least four tooth grooves are provided on both the inner gear disc and the outer gear disc, and each tooth groove on the outer gear disc communicates with one of the tread grooves; It further includes a fine groove group disposed adjacent to the tread center line. The fine groove group is a multi-fold groove structure, and adjacent two fine groove groups are mirror-imaged in an inverted and staggered manner with respect to the tread center line; the fine groove group includes a vertical groove, a first inclined groove, a second inclined groove and a third inclined groove that are sequentially communicated. The vertical groove is parallel to the tread center line, and the third inclined groove is connected to the tread center line.

2. The tire tread pattern structure according to claim 1, wherein: The lengths of two adjacent tread grooves in the inclined tread groove group are inconsistent.

3. The tire tread pattern structure according to claim 1, characterized in that: In the axial direction of the tire and from near the tread center line to the tire shoulder, there are at least two tread grooves whose lengths first gradually increase, and at least two tread grooves whose lengths gradually decrease.

4. The tire tread pattern structure according to claim 3, characterized in that: From the tread center line to the tire shoulder, the inclined tread groove group includes a first tread groove, a second tread groove, a third tread groove, a fourth tread groove, a fifth tread groove, a sixth tread groove and a seventh tread groove. The lengths of the first tread groove to the third tread groove gradually increase, and the lengths of the third tread groove to the seventh tread groove gradually decrease.

5. The tire tread pattern structure according to claim 4, characterized in that: The included angle between the first tread groove and the tread center line is 5° - 15°, and the included angles between the second tread groove, the third tread groove, the fourth tread groove, the fifth tread groove, the sixth tread groove and the seventh tread groove and the tread center line are all 30° - 50°.

6. The tire tread pattern structure according to claim 1, characterized in that: The depth of the tooth groove of the inner gear disc is less than the depth of the tooth groove of the outer gear disc.

7. A tire for a high-humidity gripping motorcycle, characterized in that: It includes a tire tread pattern structure according to any one of claims 1 - 6.

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