Asymmetric tread structure and tire

Abstract

The utility model discloses an asymmetric type tread structure and tire relates to tire field, and wet ground adhesion and controllability are excellent, and the driving comfort is good, and the driving noise and the low rolling resistance, four main grooves divide the tread into the outside shoulder pattern rib, the outside pattern rib, the center pattern rib, the inside pattern rib and the inside shoulder pattern rib, the inside pattern rib, the center pattern rib and the outside pattern rib are equipped with a plurality of pattern grooves, in the inside shoulder pattern rib, the outer end of a plurality of first wide groove is connected with a plurality of inclined first thin groove respectively, and the outer end of a plurality of first thin groove is connected with the adjacent main groove, the separation groove extending along the tread circumferential direction divides the outside shoulder pattern rib into first rib and second rib, and the width of the first rib in the inside is less than the width of the second rib, and a plurality of second thin grooves on the first rib are connected with the adjacent main groove and separation groove respectively, and the inner end of a plurality of second wide groove on the second rib is connected with separation groove.

Description

Technical Field

[0001] This utility model relates to the field of tire technology, and in particular to an asymmetric tread structure and tire. Background Technology

[0002] In the past, tire wear performance and load-bearing capacity were the focus of market attention during car driving. However, with the continuous development of global automotive technology and the continuous improvement of people's car concepts, higher and higher requirements have been put forward for tires that provide load-bearing capacity and transmit driving force. In particular, various countries have formulated corresponding tire labeling regulations. Therefore, there is increasing attention to tire noise, ride comfort and dry and wet road safety.

[0003] Generally, depending on different tire usage requirements, passenger car tire tread patterns can be divided into large tread blocks and small tread blocks according to size, and into symmetrical, asymmetrical, and directional tread blocks according to layout. Among them, small tread block designs are beneficial to improving tire noise and ride comfort, but are not conducive to improving tire handling performance in both dry and wet conditions. On the other hand, large tread block designs are the opposite; they are beneficial to improving tire handling stability, but are not conducive to improving noise and comfort.

[0004] How to achieve the optimal balance between good dry and wet grip and handling, low rolling resistance, and maximum ride comfort and low road noise, thus designing the best tire product, has always been a key consideration for tire tread pattern designers. Generally, a tread pattern design technology can improve certain performance aspects of passenger car tires, while conversely, it can limit the improvement of other performance aspects. Therefore, how to comprehensively consider the optimal solution among many performance factors and develop targeted tire products to meet market demands is a significant test of the wisdom of tire tread pattern designers. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an asymmetrical tread structure and tire, which has excellent wet grip and handling, while ensuring good ride comfort and low driving noise and rolling resistance.

[0006] The first aspect of this utility model provides an asymmetrical tread structure, which includes a tread. The tread has four main grooves arranged parallel to each other and spaced apart along the axial direction of the tread. The four main grooves extend circumferentially along the tread to divide the tread into outer shoulder tread ribs, outer tread ribs, center tread ribs, inner tread ribs and inner shoulder tread ribs in sequence along the axial direction of the tread. The inner patterned ribs, the central patterned ribs, and the outer patterned ribs are all provided with multiple patterned grooves; The inner shoulder tread ribs are provided with a first wide groove and a first narrow groove arranged at an incline. There are multiple first wide grooves and first narrow grooves, which are spaced apart along the circumference of the tire tread. The outer end of the first wide groove is connected to the first narrow groove, and the outer end of the first narrow groove is connected to the adjacent main groove. The outer shoulder tread ribs are provided with dividing grooves extending circumferentially along the tread surface to divide the outer shoulder tread ribs into a first rib and a second rib. The first rib is located inside the second rib, and the width of the first rib is smaller than the width of the second rib. The first rib is provided with a plurality of second fine grooves arranged circumferentially along the tread surface, and the second fine grooves are respectively connected to the adjacent main groove and the dividing groove. The second rib is provided with a plurality of second wide grooves arranged circumferentially along the tread surface, and the inner end of the second wide groove is connected to the dividing groove.

[0007] The asymmetrical tread structure according to the first aspect of this utility model has at least the following beneficial effects: the inner tread ribs, the central tread ribs, and the outer tread ribs are all provided with multiple tread grooves, which can reduce excessive deformation of the tire during driving while ensuring a certain rigidity, maintaining the tire's handling performance while reducing the tire's rolling resistance; the outer shoulder tread ribs are divided into a first rib and a second rib by the dividing grooves, the first rib is located closer to the inner side of the tire than the second rib, and is smaller in width than the second rib, the first rib is provided with multiple second fine grooves, thus effectively dispersing the shape of the tread contact mark and the distribution of contact stress on the outer shoulder of the tire, which is beneficial. To improve tire cornering stability, the second rib has multiple second-wide grooves, which effectively increase the contact area of ​​the outer shoulder of the tire, thus enhancing cornering stability and preventing premature wear on the outer shoulder. It also helps to quickly guide water from the center of the tire to the outside and drain it away. Furthermore, the inner shoulder tread rib has multiple first-wide grooves and multiple first-narrow grooves, ensuring high grip on the inner shoulder while cutting through the water film surface to quickly drain water. This achieves high drainage performance on the inner shoulder at high speeds and also reduces noise, further enhancing the tire's wet grip and handling performance.

[0008] In some embodiments of this utility model, the first rib is further provided with a plurality of first oblique grooves, and a plurality of second fine grooves are Y-shaped grooves and are arranged at unequal intervals along the circumference of the tread. The first oblique groove is a V-shaped groove, and the second fine groove is located outside the first oblique groove. The two ends of the second fine groove are respectively connected to the outer ends of the separating groove and the first oblique groove, and the inner end of the first oblique groove is connected to the adjacent main groove.

[0009] In some embodiments of this utility model, the second fine groove extends along the axial direction of the tire tread, and the first oblique groove is inclined; the plurality of second wide grooves are oblique curved grooves and are arranged at unequal intervals along the circumference of the tire tread.

[0010] In some embodiments of this utility model, the width of the two main grooves adjacent to the central tread rib is greater than the width of the other two main grooves; the width of the main groove located near the inner shoulder tread rib is greater than the width of the main groove located near the outer shoulder tread rib; and / or, The inner and outer tread ribs are the same width, but larger than the width of the center tread rib. The inner shoulder tread rib is smaller than the outer shoulder tread rib, but larger than both the inner and outer tread ribs; and / or, The bottom surface of the main groove is provided with a plurality of inclined ribs, which are spaced apart along the circumference of the tire tread.

[0011] In some embodiments of this utility model, the tread groove located on the outer tread rib includes a second oblique groove and a third oblique groove. The second oblique groove is located outside the third oblique groove and is longer than the third oblique groove. The outer end of the second oblique groove is connected to the adjacent main groove, and the inner end of the third oblique groove is connected to the adjacent main groove. The second oblique groove and the third oblique groove have a distance along the axial direction of the tread. Both the second oblique groove and the third oblique groove are inclined.

[0012] In some embodiments of this utility model, a plurality of second oblique grooves and a plurality of third oblique grooves are arranged at unequal intervals along the circumference of the tire tread, the second oblique grooves and the third oblique grooves have the same tilt direction and tilt angle, and the second oblique grooves and the third oblique grooves are both Y-shaped grooves.

[0013] In some embodiments of this utility model, the tread groove located on the central tread rib includes a third fine groove and two fourth oblique grooves. The plurality of third fine grooves are inclined and arranged at unequal intervals along the circumference of the tread. The two fourth oblique grooves are respectively located at both ends of the third fine groove and communicate with the third fine groove. The fourth oblique grooves are connected to the adjacent main groove.

[0014] In some embodiments of this utility model, the tread grooves located on the inner tread ribs include a fourth fine groove and a fifth oblique groove. A plurality of fourth fine grooves are arranged at an incline and at unequal intervals along the circumference of the tread. The fourth fine grooves are located outside the fifth oblique grooves. The two ends of the fourth fine grooves are respectively connected to the outer ends of the adjacent main grooves and the fifth oblique grooves. The inner end of the fifth oblique grooves is connected to the adjacent main grooves.

[0015] In some embodiments of this utility model, the tilting direction of the first fine groove is opposite to that of the third fine groove, the first fine groove and the fourth fine groove have the same tilting direction and tilting angle, and the third fine groove, the second oblique groove and the third oblique groove have the same tilting direction and tilting angle.

[0016] The second aspect of this utility model provides a tire, the tire having an asymmetric tread structure as described in the first aspect embodiment.

[0017] The tire according to the second aspect of the present invention has at least the following beneficial effects: by adopting the above-mentioned asymmetrical tread structure, the tire can have high wet grip, high handling and low rolling resistance while ensuring good driving comfort and low driving noise, making the tire more suitable for wet and slippery roads.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the asymmetric tread structure provided according to an embodiment of the present invention; Figure 2 This is a physical schematic diagram of a tire provided according to an embodiment of the present utility model.

[0020] Reference numerals: 100, central tread rib; 110, third fine groove; 120, fourth oblique groove; 200, main groove; 210, spoiler rib; 310, outer tread rib; 311, second oblique groove; 312, third oblique groove; 320, inner tread rib; 321, fourth fine groove; 322, fifth oblique groove; 410, first rib; 411, second fine groove; 412, first oblique groove; 420, second rib; 421, second wide groove; 430, inner shoulder tread rib; 431, first wide groove; 432, first fine groove; 500, dividing groove. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "several" means one or more, and "multiple" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following is for reference. Figure 1 and Figure 2 This invention describes an asymmetric tread structure and tire according to an embodiment of the present invention.

[0025] like Figure 1 and Figure 2 As shown, the asymmetrical tread structure provided according to the first aspect of this utility model relates to the tread pattern of a pneumatic tire for a passenger car, and is suitable for highway roads. The asymmetrical tread structure of this embodiment has the advantages of excellent wet grip and handling, low rolling resistance, good dry handling, and low driving noise.

[0026] The asymmetric tread structure of this embodiment has circumferential and axial directions, wherein the circumferential direction is consistent with the tire's circumference, the axial direction is consistent with the tire's axial direction, and the axial direction is perpendicular to the circumferential direction. It is understood that... Figure 1 Only a partial structure of the asymmetric tread is shown, where the longitudinal direction represents the asymmetric tread structure in... Figure 1 The extension direction is longitudinally perpendicular to the axial direction. Furthermore, the inner side of the asymmetrical tread structure refers to the side along the tire's axial direction closest to the vehicle center, and the outer side of the asymmetrical tread structure refers to the side along the tire's axial direction furthest from the vehicle center. In this embodiment, as... Figure 1 As shown, the inner side of the asymmetrical tread structure is designated as the right side, and the outer side of the asymmetrical tread structure is designated as the left side.

[0027] like Figure 1 and Figure 2 As shown, the asymmetrical tread structure includes a tread with four main grooves 200. The four main grooves 200 are arranged parallel to each other along the axial direction of the tread and at certain intervals. The four main grooves 200 extend circumferentially along the tread to form a circular groove structure. The four main grooves 200 sequentially divide the tread into outer shoulder tread ribs, outer tread ribs 310, center tread ribs 100, inner tread ribs 320, and inner shoulder tread ribs 430. The outer shoulder tread ribs... The outer tread ribs 310, the center tread ribs 100, the inner tread ribs 320, and the inner shoulder tread ribs 430 are arranged sequentially along the axial direction of the tire tread. Specifically, the outer tread ribs 310 and the inner tread ribs 320 are located on both sides of the center tread ribs 100, and are adjacent to the center tread ribs 100. Moreover, the outer tread ribs 310 and the inner tread ribs 320 are located between the outer shoulder tread ribs and the inner shoulder tread ribs 430.

[0028] The inner tread rib 320, the center tread rib 100, and the outer tread rib 310 each have multiple tread grooves, which are arranged along the circumference of the tire tread at preset intervals. These grooves can be oblique. The inner tread rib 320, the center tread rib 100, and the outer tread rib 310 together form the central area of ​​the tire, thus constituting the central tread ribs. Simultaneously, the inner shoulder tread rib 430 and the outer shoulder tread ribs form the shoulder tread ribs of the tire.

[0029] The inner shoulder tread rib 430 is provided with a plurality of first wide grooves 431 and a plurality of first narrow grooves 432. The plurality of first wide grooves 431 are arranged at intervals along the circumference of the tire tread, and the plurality of first narrow grooves 432 are arranged at intervals along the circumference of the tire tread. Each first narrow groove 432 is inclined, that is, the extension direction of the first narrow groove 432 forms a certain acute angle with the axial direction of the tire tread. The first wide groove 431 is located inside the first narrow groove 432, and the outer end of the first wide groove 431 communicates with the first narrow groove 432. The outer end of the first narrow groove 432 communicates with the adjacent main groove 200. In this embodiment, both the first narrow groove 432 and the first wide groove 431 are inclined. The first narrow groove 432 is inclined in the opposite direction to the first wide groove 431, and the inclination angle of the first narrow groove 432 is greater than that of the first wide groove 431. Understandably, the inner shoulder tread rib 430 is divided by two grooves of different widths (i.e., the first wide groove 431 and the first narrow groove 432), which can ensure the good grip performance of the inner shoulder tread rib 430, and can also cut the water film surface through the first wide groove 431 to quickly drain water, thus achieving high water drainage performance of the inner shoulder tread rib 430 at high speeds.

[0030] The outer shoulder tread rib has a dividing groove 500 extending circumferentially along the tread, so that the dividing groove 500 appears annular when viewed axially along the tread. The cross-sectional shape of the dividing groove 500 can be square. The dividing groove 500 divides the outer shoulder tread rib into a first rib 410 and a second rib 420, wherein the first rib 410 is located inside the second rib 420, and the width of the first rib 410 is smaller than the width of the second rib 420. For example, the width of the second rib 420 can be 5-8 times the width of the first rib 410.

[0031] The first rib 410 is provided with a plurality of second fine grooves 411, which are arranged at intervals along the circumference of the tread. The inner and outer ends of the second fine grooves 411 respectively penetrate the two sides of the first rib 410, so that the inner end of the second fine groove 411 is connected to the adjacent main groove 200, and the outer end of the second fine groove 411 is connected to the dividing groove 500.

[0032] Furthermore, the first rib 410 is also provided with a plurality of first oblique grooves 412, which are arranged in a one-to-one correspondence with a plurality of second fine grooves 411. Each second fine groove 411 is a Y-shaped groove, that is, the cross-sectional shape of the second fine groove 411 is Y-shaped, and the plurality of second fine grooves 411 are arranged at unequal intervals along the circumferential direction of the tread. The first oblique groove 412 is a V-shaped groove, that is, the cross-sectional shape of the first oblique groove 412 is V-shaped. The second fine grooves 411 are located outside the first oblique grooves 412, and the two ends of the second fine grooves 411 are respectively connected to the outer ends of the separating groove 500 and the first oblique grooves 412. The inner end of the first oblique grooves 412 is connected to the adjacent main groove 200. Moreover, the second fine grooves 411 extend along the axial direction of the tread, and the first oblique grooves 412 are inclined. In this embodiment, the width of the second fine groove 411 can be set from 0.2 mm to 4 mm, and the width of the first oblique groove 412 can be set from 1 mm to 10 mm.

[0033] The second rib 420 is provided with a plurality of second wide grooves 421, which are arranged at intervals along the circumference of the tread. The inner end of each second wide groove 421 penetrates the inner side surface of the second rib 420, thereby communicating with the dividing groove 500. In this embodiment, the second wide grooves 421 are oblique curved grooves, and the plurality of second wide grooves 421 are arranged at unequal intervals along the circumference of the tread. The width of the second wide grooves 421 can be set from 5 mm to 15 mm.

[0034] Understandably, the outer shoulder tread pattern ribs are divided into inner and outer sections by the dividing groove 500, namely the first rib 410 and the second rib 420. The first rib 410 is divided into multiple tread blocks of a number equal to the pitch by multiple second fine grooves 411 and multiple first oblique grooves 412. This effectively disperses the shape of the tread contact patch and the distribution of contact stress on the outer shoulder of the tire, which is beneficial to improving the tire's handling stability when cornering. The second rib 420 is divided by uniform, narrow oblique grooves, which can effectively increase the contact area on the outer shoulder of the tire, which is beneficial to enhancing the tire's handling stability when cornering, while also preventing premature wear on the tire shoulder.

[0035] In this embodiment, the width of the two main grooves 200 adjacent to the central tread rib 100 is greater than the width of the other two main grooves 200, and the width of the main groove 200 near the inner shoulder tread rib 430 is greater than the width of the main groove 200 near the outer shoulder tread rib. The central tread rib 100, the inner tread rib 320, the outer tread rib 310, the inner shoulder tread rib 430, and the outer shoulder tread rib are separated by four main grooves 200 with different widths. For example, the width of the two main grooves 200 adjacent to the central tread rib 100 can be set to 6mm to 24mm, the width of the main groove 200 near the inner shoulder tread rib 430 can be set to 5mm to 22mm, and the width of the main groove 200 near the outer shoulder tread rib can be set to 4mm to 20mm.

[0036] Understandably, this unique design ensures that the tire quickly expels water when driving on wet surfaces, providing excellent wet grip, cornering stability, and precise steering response, thus improving wet safety. Simultaneously, the differentiated width design of the innermost and outermost main grooves 200 ensures that the inner and outer shoulder tread ribs 430 have a larger contact patch, thereby guaranteeing good overall grip and handling performance at both the inner and outer shoulder areas of the tire.

[0037] Furthermore, the inner tread rib 320 and the outer tread rib 310 are the same in width. The width of both the inner tread rib 320 and the outer tread rib 310 is greater than the width of the center tread rib 100. The width of the inner shoulder tread rib 430 is smaller than the width of the outer shoulder tread rib, but the width of the inner shoulder tread rib 430 is greater than the width of both the inner tread rib 320 and the outer tread rib 310. It is understood that the aforementioned width dimensions can be selected according to actual design requirements and are not specifically limited here.

[0038] In some embodiments, such as Figure 1 As shown, each main groove 200 has multiple deflector ribs 210 on its bottom surface. These ribs are arranged at an angle and spaced apart circumferentially along the tread. In this embodiment, the ribs 210 are evenly distributed, and they are located on the side of the main groove 200 closest to the central tread rib 100. It is understood that the deflector ribs 210 effectively disrupt the frequency of compressed air within the main groove 200 during driving, causing noise frequencies to neutralize each other and thus reducing driving noise.

[0039] In some embodiments, such as Figure 1 and Figure 2 As shown, each tread groove on the outer tread rib 310 includes a second oblique groove 311 and a third oblique groove 312. The second oblique groove 311 is located outside the third oblique groove 312, and is longer than the third oblique groove 312. The outer end of the second oblique groove 311 penetrates the outer surface of the outer tread rib 310, connecting to the adjacent main groove 200. The inner end of the third oblique groove 312 penetrates the inner surface of the outer tread rib 310, connecting to the adjacent main groove 200. The second oblique groove 311 and the third oblique groove 312 have an axial spacing along the tread, and both are inclined.

[0040] In this embodiment, multiple second oblique grooves 311 and multiple third oblique grooves 312 are arranged at unequal intervals along the circumference of the tire tread. Furthermore, the second oblique grooves 311 and third oblique grooves 312 have the same inclination direction and the same inclination angle, and both are Y-shaped grooves. The width of the second oblique grooves 311 and third oblique grooves 312 can be set from 0.4 mm to 10 mm.

[0041] It is understandable that the specific dimensions, inclination angles, and spacing of the second oblique groove 311 and the third oblique groove 312 can be set according to actual needs, and are not specifically limited here. The opening size of the second oblique groove 311 gradually increases towards the adjacent main groove 200 (i.e., to the left), and the opening size of the third oblique groove 312 gradually increases towards the adjacent main groove 200 (i.e., to the right). The outer tread rib 310 is cut by multiple second oblique grooves 311 and multiple third oblique grooves 312, but the entire outer tread rib 310 is still connected in the circumferential direction of the tread, ensuring that the entire outer tread rib 310 has a certain rigidity when the tread rubber is under stress. This enhances the mutual support of the tread rubber at the outer tread rib 310 during deformation, reduces excessive deformation of the outer tread rib 310, and effectively maintains the tire's excellent grip and handling performance.

[0042] In some embodiments, such as Figure 1 and Figure 2As shown, each tread groove on the central tread rib 100 includes a third fine groove 110 and two fourth oblique grooves 120. The third fine grooves 110 are inclined and arranged at unequal intervals along the circumference of the tread. The two fourth oblique grooves 120 are located at opposite ends of the third fine groove 110, with one end of each fourth oblique groove 120 communicating with the third fine groove 110 and the other end communicating with the adjacent main groove 200.

[0043] In this embodiment, the two fourth oblique grooves 120 are centrally symmetrically arranged about the third fine groove 110. The cross-sectional shape of the third fine groove 110 can be square or Y-shaped. The cross-sectional shape of the fourth oblique groove 120 is V-shaped. It can be understood that the central tread rib 100 is cut by multiple third fine grooves 110 and multiple fourth oblique grooves 120, which can effectively reduce the stiffness of the central tread rib 100 (i.e., the middle part of the tire) while ensuring the overall strength of the central tread rib 100, reduce the excessive deformation of the central tread rib 100 during vehicle operation, and reduce the rolling resistance of the tire while ensuring that the central tread rib 100 has good wet grip and handling stability. The width of the third fine groove 110 ranges from 0.6 mm to 2.5 mm, and the width of the fourth oblique groove 120 ranges from 0.8 mm to 5.0 mm.

[0044] Multiple third fine grooves 110 divide the central tread rib 100 into tread blocks with the same number of pitches, effectively dividing the stiffness of the central tread rib 100 and optimizing the stress distribution in the center of the tire. Then, multiple fourth oblique grooves 120 uniformly cut the ribs, effectively reducing the stiffness at the tip while maintaining the overall strength of the central tread rib 100. This reduces excessive deformation of the central tread rib 100 during tire operation, ensuring excellent grip and handling stability in the tire's center position and reducing rolling resistance.

[0045] In some embodiments, such as Figure 1 and Figure 2 As shown, each tread groove on the inner tread rib 320 includes a fourth fine groove 321 and a fifth oblique groove 322. The fourth fine grooves 321 are arranged at an angle and are spaced unequally along the circumference of the tread. The fourth fine grooves 321 are located outside the fifth oblique grooves 322. The two ends of the fourth fine grooves 321 are connected to the adjacent main groove 200 and the outer end of the fifth oblique groove 322, respectively. The inner end of the fifth oblique groove 322 is connected to the adjacent main groove 200.

[0046] In this embodiment, the cross-sectional shape of the fourth fine groove 321 can be square or Y-shaped. The cross-sectional shape of the fifth oblique groove 322 is V-shaped. The inclination direction of the first fine groove 432 is opposite to that of the third fine groove 110. The first fine groove 432 and the fourth fine groove 321 have the same inclination direction and the same inclination angle. Furthermore, the third fine groove 110, the second oblique groove 311, and the third oblique groove 312 have the same inclination direction and the same inclination angle. The width of the fourth fine groove 321 can be set to a range of 0.4 mm to 8 mm, and the depth can be set to a range of 1 mm to 8 mm. The width of the fifth oblique groove 322 can be set to a range of 1 mm to 10 mm.

[0047] Understandably, the inner tread ribs 320 are cut into multiple tread blocks, each with a pitch number, by multiple fourth fine grooves 321 and multiple fifth oblique cuts 322. This results in a larger tread pitch width, effectively increasing the contact area of ​​the inner tread ribs 320 and enhancing their rigidity. This, in turn, helps to improve the tire's handling stability. Simultaneously, the design of the fourth fine grooves 321 ensures an increased contact area during the later stages of tire use, maintaining grip and ensuring excellent overall handling performance. Furthermore, on wet surfaces, the fifth oblique cuts 322 can quickly and effectively penetrate the water film surface, improving the drainage performance of the inner tread ribs 320.

[0048] In this embodiment, the inner tread pattern ribs 320 and the outer tread pattern ribs 310 are arranged asymmetrically, and the inner shoulder tread pattern ribs 430 and the outer shoulder tread pattern ribs are arranged asymmetrically.

[0049] The first aspect of this utility model provides an asymmetrical tread structure, which adopts an asymmetrical pattern design on the left and right sides and a composition of pitch units of different widths. This embodiment makes a special design for the shape of the tire tread grooves. Through the combination of tread ribs of appropriate number and width, four longitudinally extending main grooves 200, and some wide grooves and narrow grooves, the tire with this asymmetrical tread structure not only has high grip, high handling and low rolling resistance, but also maximizes the driving comfort of the tire and makes the tire have low driving noise.

[0050] This asymmetric tread structure is composed of 3 to 7 tread pitch units stacked circumferentially according to a simulation-optimized sequence. Each tread pitch unit contains pitches of varying widths and numbers, with pitch widths ranging from 15mm to 50mm and the number of pitches ranging from 50 to 90. It can be understood that tire pitch refers to the circumferential spacing between tread blocks or grooves on the tire tread.

[0051] In the asymmetrical tread structure provided in the first aspect embodiment of this utility model, the inner tread rib 320, the central tread rib 100, and the outer tread rib 310 are all provided with multiple tread grooves, which can reduce excessive deformation of the tire during driving while ensuring a certain rigidity, maintaining the tire's handling performance and reducing the tire's rolling resistance; the outer shoulder tread rib is divided into a first rib 410 and a second rib 420 by the dividing groove 500. The first rib 410 is located closer to the inner side of the tire than the second rib 420 and is smaller in width than the second rib 420. The first rib 410 is provided with multiple second fine grooves 411, which can effectively disperse the shape of the tread contact mark and the distribution of contact stress on the outer shoulder of the tire. Furthermore, the second rib 420 is equipped with multiple second wide grooves 421, which can effectively increase the contact area of ​​the outer shoulder of the tire, thus enhancing the handling stability of the tire during cornering and preventing premature wear of the outer shoulder. It can also quickly guide water from the center of the tire to the outside and drain it out. In addition, the inner shoulder tread rib 430 is equipped with multiple first wide grooves 431 and multiple first narrow grooves 432, which can ensure high grip performance of the inner shoulder of the tire and cut the water film surface to quickly drain water, achieving high drainage performance of the inner shoulder of the tire at high speeds. It can also improve noise levels, thereby further enhancing the tire's wet grip and handling performance.

[0052] like Figure 1 and Figure 2 As shown, the tire provided according to the second aspect embodiment of the present invention has a tread structure as described in the first aspect embodiment.

[0053] The second aspect of this utility model provides a professional pneumatic tire for installation on high-end sports cars. This pneumatic tire employs an asymmetrical tread pattern design. Specifically, through the differentiated design of the inner and outer tread patterns, the tire achieves excellent wet grip and handling, as well as low rolling resistance on highways or ordinary urban roads. Simultaneously, it ensures good comfort and low driving noise. By effectively balancing performance in terms of noise, wear, and handling, it satisfactorily meets the tire requirements of modern passenger cars in practical use.

[0054] By adopting the aforementioned asymmetrical tread structure, the tire can achieve high wet grip, high handling, and low rolling resistance while ensuring good ride comfort and low driving noise, making it more suitable for slippery roads.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An asymmetric tread structure, characterized in that, The tire includes a tread, on which four main grooves are arranged parallel to each other and spaced apart along the axial direction of the tread. The four main grooves extend circumferentially along the tread to divide the tread into outer shoulder tread ribs, outer tread ribs, center tread ribs, inner tread ribs and inner shoulder tread ribs in sequence along the axial direction of the tread. The inner patterned ribs, the central patterned ribs, and the outer patterned ribs are all provided with multiple patterned grooves; The inner shoulder tread ribs are provided with a first wide groove and a first narrow groove arranged at an incline. There are multiple first wide grooves and first narrow grooves, which are spaced apart along the circumference of the tire tread. The outer end of the first wide groove is connected to the first narrow groove, and the outer end of the first narrow groove is connected to the adjacent main groove. The outer shoulder tread ribs are provided with dividing grooves extending circumferentially along the tread surface to divide the outer shoulder tread ribs into a first rib and a second rib. The first rib is located inside the second rib, and the width of the first rib is smaller than the width of the second rib. The first rib is provided with a plurality of second fine grooves arranged circumferentially along the tread surface, and the second fine grooves are respectively connected to the adjacent main groove and the dividing groove. The second rib is provided with a plurality of second wide grooves arranged circumferentially along the tread surface, and the inner end of the second wide groove is connected to the dividing groove.

2. The asymmetric tread structure according to claim 1, characterized in that, The first rib is also provided with a plurality of first oblique grooves, and a plurality of second fine grooves are Y-shaped grooves and are arranged at unequal intervals along the circumference of the tread. The first oblique groove is a V-shaped groove, and the second fine groove is located outside the first oblique groove. The two ends of the second fine groove are respectively connected to the outer ends of the dividing groove and the first oblique groove, and the inner end of the first oblique groove is connected to the adjacent main groove.

3. The asymmetric tread structure according to claim 2, characterized in that, The second fine groove extends along the axial direction of the tread, and the first oblique groove is inclined; the plurality of second wide grooves are oblique curved grooves and are arranged at unequal intervals along the circumference of the tread.

4. The asymmetric tread structure according to claim 1, characterized in that, The width of the two main grooves adjacent to the central tread rib is greater than the width of the other two main grooves; the width of the main groove located near the inner shoulder tread rib is greater than the width of the main groove located near the outer shoulder tread rib; and / or, The inner and outer tread ribs are the same width, but larger than the width of the center tread rib. The inner shoulder tread rib is smaller than the outer shoulder tread rib, but larger than both the inner and outer tread ribs; and / or, The bottom surface of the main groove is provided with a plurality of inclined ribs, which are spaced apart along the circumference of the tire tread.

5. The asymmetric tread structure according to claim 1, characterized in that, The tread grooves located on the outer tread ribs include a second oblique groove and a third oblique groove. The second oblique groove is located outside the third oblique groove and is longer than the third oblique groove. The outer end of the second oblique groove is connected to the adjacent main groove, and the inner end of the third oblique groove is connected to the adjacent main groove. There is an axial distance between the second oblique groove and the third oblique groove along the tread. Both the second oblique groove and the third oblique groove are inclined.

6. The asymmetric tread structure according to claim 5, characterized in that, The second and third oblique grooves are arranged at unequal intervals along the circumference of the tread. The second and third oblique grooves have the same tilt direction and tilt angle. The second and third oblique grooves are both Y-shaped grooves.

7. The asymmetric tread structure according to claim 6, characterized in that, The tread grooves located on the central tread rib include a third fine groove and two fourth oblique grooves. The third fine grooves are inclined and arranged at unequal intervals along the circumference of the tread. The two fourth oblique grooves are located at both ends of the third fine grooves and are connected to the third fine grooves. The fourth oblique grooves are connected to the adjacent main grooves.

8. The asymmetric tread structure according to claim 7, characterized in that, The tread grooves located on the inner tread ribs include a fourth fine groove and a fifth oblique groove. The plurality of fourth fine grooves are arranged at an angle and at unequal intervals along the circumference of the tread. The fourth fine grooves are located outside the fifth oblique grooves. The two ends of the fourth fine grooves are respectively connected to the outer ends of the adjacent main grooves and the fifth oblique grooves. The inner end of the fifth oblique grooves is connected to the adjacent main grooves.

9. The asymmetric tread structure according to claim 8, characterized in that, The first fine groove has an inclination direction opposite to that of the third fine groove. The first fine groove and the fourth fine groove have the same inclination direction and inclination angle. The third fine groove, the second oblique groove, and the third oblique groove have the same inclination direction and inclination angle.

10. A tire, characterized in that, The tire tread is provided with an asymmetric tread structure as described in any one of claims 1 to 9.

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