All-steel radial tire

Abstract

The utility model provides an all-steel radial tire which is provided with two shoulder pattern grooves and two crown pattern grooves which extend in the circumferential direction of the tire, a central pattern strip is formed in the area between the two crown pattern grooves, and a crown pattern strip is formed in the area between the crown pattern grooves and the shoulder pattern grooves adjacent to the crown pattern grooves. Shoulder pattern strips are formed in the areas of the sides, deviating from the crown pattern grooves, of the shoulder pattern grooves, a plurality of transverse grooves and a plurality of transverse steel sheets are arranged on the central pattern strips and the crown pattern strips, and the transverse grooves and the transverse steel sheets are alternately distributed in the circumferential direction of the tread; a plurality of transverse shallow cutter grooves are formed in the shoulder pattern strips, one ends of the transverse shallow cutter grooves extend to the shoulder pattern grooves, and the other ends of the transverse shallow cutter grooves extend to the interiors of the shoulder pattern strips; the shoulder pattern groove is a circumferential linear pattern groove, and the crown pattern groove is a circumferential zigzag pattern groove in which discontinuous reinforcing ribs are arranged. By adopting the scheme, the comprehensive performance and applicability of the all-steel radial tire can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, in particular to an all-steel radial tire. Background Art

[0002] With the rapid development of transportation vehicles in recent years, consumers have higher and higher requirements for various performances of tires. For example, as people put forward more stringent requirements for automobile energy conservation and emission reduction, consumers hope that tires have lower rolling resistance, higher wear performance, better anti-slip performance and better comfort performance.

[0003] In order to pursue the improvement of various performances, when the main driving environment is medium-long-distance high-speed, consumers will choose different wheel products according to different wheel positions to meet various performance requirements of the vehicle, such as the controllability, safety and good stone removal of the guide wheel position, and the drivability of the driving wheel position, etc. However, this design method undoubtedly greatly increases the use and maintenance costs of consumers. Utility Model Content

[0004] The utility model provides an all-steel radial tire, which improves the comprehensive performance and applicability of the all-steel radial tire and reduces the use and maintenance costs of tires with different wheel positions.

[0005] In order to solve the above problems, the utility model provides an all-steel radial tire, the tread of the all-steel radial tire has two shoulder pattern grooves and two crown pattern grooves extending along its circumferential direction, the two crown pattern grooves are located between the two shoulder pattern grooves, the area between the two crown pattern grooves forms a central pattern strip, the area between the crown pattern groove and the shoulder pattern groove adjacent thereto forms a crown pattern strip, and the area on the side of the shoulder pattern groove away from the crown pattern groove forms a shoulder pattern strip, and the central pattern strip and the crown pattern strip are both provided with a plurality of transverse grooves and a plurality of transverse steel sheets, and the plurality of transverse grooves and the plurality of transverse steel sheets are alternately distributed in the circumferential direction of the tread; a plurality of transverse shallow knife grooves are provided on the shoulder pattern strip, one end of the transverse shallow knife grooves extends to the shoulder pattern groove, and the other end of the transverse shallow knife grooves extends to the inside of the shoulder pattern strip; the shoulder pattern grooves are circumferential straight pattern grooves, and the crown pattern grooves are circumferential zigzag pattern grooves with non-continuous reinforcement ribs arranged inside.

[0006] Furthermore, in the circumferential direction of the tread, a shoulder pattern block is formed between any two adjacent shallow transverse grooves, and the ratio of the extension lengths of any two adjacent shoulder pattern blocks is 1 to 1.1, and / or, a middle pattern block is formed between any two adjacent transverse grooves, and the ratio of the extension lengths of any two adjacent middle pattern blocks is 1 to 1.1, and the distance between the transverse steel sheet and the two adjacent transverse grooves is the same.

[0007] Furthermore, in the width direction of the tread, the multiple transverse grooves located on the center tread strip correspond one-to-one to the multiple transverse steel sheets located on the crown tread strip, and the multiple transverse steel sheets located on the center tread strip correspond one-to-one to the multiple transverse grooves located on the crown tread strip, and any transverse shallow knife groove corresponds to a transverse groove or a transverse steel sheet; a corresponding group of transverse shallow knife grooves, transverse grooves and transverse steel sheets extend in a wave shape.

[0008] Furthermore, the transverse steel sheet and transverse groove located on the central tread strip are respectively S-shaped transverse steel sheets and S-shaped transverse grooves, the S-shaped transverse grooves and the S-shaped transverse steel sheets are centrally symmetrical structures and are parallel to each other, and the two ends of the S-shaped transverse grooves and the S-shaped transverse steel sheets in the tread width direction respectively extend to the two crown pattern grooves on both sides, and the groove width of the S-shaped transverse groove gradually increases from the middle of the S-shaped transverse groove toward the two ends of the S-shaped transverse groove.

[0009] Furthermore, the transverse steel sheets and transverse grooves on the crown tread strip are arc-shaped transverse grooves and arc-shaped transverse steel sheets respectively, the arc-shaped transverse grooves and the arc-shaped transverse steel sheets are parallel to each other, and the two ends of the arc-shaped transverse grooves and the arc-shaped transverse steel sheets in the tread width direction respectively extend to the crown tread grooves and shoulder tread grooves on both sides, and the groove width of the arc-shaped transverse grooves gradually increases in the direction from the crown tread strip toward the center tread strip.

[0010] Furthermore, in the width direction of the tread, the width of the center rib is A, the width of the crown rib is B, the width of the shoulder rib is C, B=(1.0-1.4)A, and / or, C=(1.0-1.4)A.

[0011] Furthermore, the ratio of the groove width of the shoulder groove to the groove width of the crown groove is 1 to 1.1.

[0012] Furthermore, the width of the transverse groove is 1 to 4 mm, and the depth of the transverse groove is 15% of the depth of the shoulder pattern groove and / or the crown pattern groove; wherein the transverse groove is an arc-shaped groove, and for the arc-shaped groove located in the center tread, the inclination angle of the tangent at any position in its extension direction relative to the radial cross-section of the tire is 50° to 80°; for the arc-shaped groove located in the crown tread, the inclination angle of the tangent at any position in its extension direction relative to the radial cross-section of the tire is 50° to 85°.

[0013] Furthermore, the thickness of the transverse steel sheet is less than 0.6 mm, and the depth of the transverse steel sheet is 15% to 35% of the depth of the shoulder pattern groove and / or the crown pattern groove; wherein the transverse steel sheet is an arc-shaped steel sheet, and for the arc-shaped steel sheet located in the center tread, the inclination angle of the tangent at any position in its extension direction relative to the radial section of the tire is 50° to 80°; for the arc-shaped steel sheet located in the crown tread, the inclination angle of the tangent at any position in its extension direction relative to the radial section of the tire is 50° to 85°.

[0014] Furthermore, in the circumferential direction of the tread, the distance between any two adjacent transverse grooves is the pattern pitch, the crown pattern groove is composed of a plurality of bending segments connected in sequence, the extension length of the bending segment in the circumferential direction of the tread is 1 / 2 of the extension length of the pattern pitch in the circumferential direction of the tread, and the tortuosity of the crown pattern groove corresponds to the arrangement of the pattern pitch.

[0015] Furthermore, the crown pattern groove adopts a countersunk design, the groove width of the crown pattern groove is 5 to 11 mm, the crown pattern groove includes a crown pattern groove and a crown countersunk groove arranged on the crown pattern groove opening, the depth of the crown countersunk groove is 3 to 5 mm, the crown pattern groove has two opposite crown groove walls and a crown groove bottom, the distance between the two crown groove walls gradually decreases in the direction of the crown countersunk groove toward the crown groove bottom, the angle between the two crown groove walls is greater than 30°, the extension direction of the crown countersunk groove is parallel to the extension direction of the crown groove bottom, and the crown groove bottom extends along the circumferential bend of the tread; the height of the non-continuous reinforcement rib is 2 to 3 mm, and the width is half of the maximum width of the crown pattern groove bottom.

[0016] Furthermore, the shoulder pattern groove adopts a countersunk design, the groove width of the shoulder pattern groove is 3 to 11 mm, the shoulder pattern groove includes a shoulder pattern groove and a shoulder countersunk groove arranged on the shoulder pattern groove opening, the depth of the shoulder countersunk groove is 3 to 5 mm, the shoulder pattern groove has two opposite shoulder groove walls and a shoulder groove bottom, the distance between the two shoulder groove walls gradually decreases in the direction of the shoulder countersunk groove toward the shoulder groove bottom, the angle between the two shoulder groove walls is greater than 25°, the shoulder groove bottom extends in a winding manner along the circumference of the tread, and the shoulder countersunk groove extends in a straight line along the circumference of the tread.

[0017] Furthermore, multiple narrow transverse steel sheets are arranged on both sides of the shoulder grooves, the extension length of the narrow transverse steel sheets in the tread width direction is 3-5 mm, and the depth of the narrow transverse steel sheets is greater than 70% of the depth of the shoulder grooves and / or crown grooves.

[0018] Furthermore, the transverse shallow groove is an arc-shaped groove, and the inclination angle of the tangent at any position in the extension direction of the transverse shallow groove relative to the radial cross-section of the tire is 60° to 90°, the thickness of the transverse shallow groove is less than 0.6 mm, and the extension length of the transverse shallow groove along the tread width direction is 2 / 3 of the width of the shoulder pattern strip.

[0019] Furthermore, the outer edge of the shoulder tread strip has an annular fillet, the width of the annular fillet is less than 2 mm, and the radius of the annular fillet is greater than 35 mm.

[0020] The technical solution of the utility model is applied to provide an all-steel radial tire, the tread of the all-steel radial tire having two shoulder grooves and two crown grooves extending in its circumferential direction, the two crown grooves being located between the two shoulder grooves, the area between the two crown grooves forming a center rib, the area between the crown groove and the shoulder groove adjacent thereto forming a crown rib, the area on the side of the shoulder groove away from the crown groove forming a shoulder rib, the center rib and the crown rib are both provided with a plurality of transverse grooves and a plurality of transverse steel sheets, the plurality of transverse grooves and the plurality of transverse steel sheets being alternately distributed in the circumferential direction of the tread; a plurality of transverse shallow knife grooves are provided on the shoulder rib, one end of the transverse shallow knife grooves extending to the shoulder grooves, and the other end of the transverse shallow knife grooves extending to the inside of the shoulder rib; the shoulder grooves are circumferential straight ribs, and the crown grooves are circumferential zigzag ribs with non-continuous reinforcing ribs arranged therein.

[0021] By adopting this scheme, the alternate arrangement of transverse grooves and transverse steel sheets on the crown tread strip and the center tread strip can effectively ensure the grip performance and drainage and stone removal performance at any position of the tire circumferentially, which is beneficial to reducing rolling resistance and improving the wear resistance and operational stability of the tire. Among them, a shoulder pattern block is formed between any two transverse shallow sipes, and the transverse shallow sipe design on the shoulder tread strips on both sides provides creep space for the deformation of the shoulder pattern block when it touches the ground, which is beneficial to reducing the ground pressure of the edge area of ​​the shoulder pattern groove and improving the anti-eccentric wear performance of the shoulder pattern block. Furthermore, the two ends of the transverse shallow sipes on the shoulder pattern strip do not completely penetrate the width of the shoulder pattern strip, that is, the shoulder pattern strip is a circumferential continuous rib. This arrangement will make the tire look stronger, while improving the overall rigidity and ground contact area of ​​the shoulder pattern block, thereby reducing the ground contact pressure, reducing rolling resistance, and improving wear resistance. On the other hand, the shoulder grooves are circumferential straight grooves, which can not only increase the drainage performance of the strong tire, but also ensure its stability in straight-line driving; the crown grooves are circumferential zigzag grooves with non-continuous reinforcement ribs inside, which can not only increase the drainage performance of the strong tire, but also improve the anti-stone clamping performance and stone clamping self-cleaning performance of the crown grooves on both sides. In summary, this solution provides a medium- and long-distance all-wheel position pattern all-steel radial tire that helps to improve comprehensive performance, which can meet the needs of consumers in medium- and long-distance road conditions and multi-wheel position working conditions, and improves the applicability of the product while improving the comprehensive performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic structural diagram of an all-steel radial tire provided by an embodiment of the utility model is shown;

[0024] Figure 2 Shows Figure 1 A cross-sectional view of a crown groove of an all-steel radial tire;

[0025] Figure 3 Shows Figure 1 Cross-sectional view of the shoulder groove of an all-steel radial tire.

[0026] The above drawings include the following reference numerals:

[0027] 10. shoulder pattern groove; 11. shoulder pattern groove; 111. shoulder groove wall; 112. shoulder groove bottom; 12. shoulder countersunk groove;

[0028] 20. Crown groove; 21. Crown groove; 211. Crown groove wall; 212. Crown groove bottom; 22. Crown countersunk groove; 23. Non-continuous reinforcement rib;

[0029] 31. Center pattern stripe; 32. Crown pattern stripe; 33. Shoulder pattern stripe; 331. Circular rounded corners;

[0030] 41. S-shaped transverse groove; 42. Arc-shaped transverse groove; 43. S-shaped transverse steel sheet; 44. Arc-shaped transverse steel sheet; 45. Transverse shallow knife groove; 46. Narrow transverse steel sheet. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] like Figures 1 to 3 As shown, an embodiment of the utility model provides an all-steel radial tire, the tread of the all-steel radial tire has two shoulder grooves 10 and two crown grooves 20 extending along the circumferential direction thereof, the two crown grooves 20 are located between the two shoulder grooves 10, the area between the two crown grooves 20 forms a center rib 31, the area between the crown groove 20 and the shoulder groove 10 adjacent thereto forms a crown rib 32, and the area on one side of the shoulder groove 10 away from the crown groove 20 forms a shoulder rib 3 3. A plurality of transverse grooves and a plurality of transverse steel sheets are arranged on the center rib 31 and the crown rib 32, and the plurality of transverse grooves and the plurality of transverse steel sheets are alternately distributed in the circumferential direction of the tread; a plurality of transverse shallow sipes 45 are arranged on the shoulder rib 33, one end of the transverse shallow sipe 45 extends to the shoulder rib 10, and the other end of the transverse shallow sipe 45 extends to the inside of the shoulder rib 33; the shoulder rib 10 is a circumferential straight rib, and the crown rib 20 is a circumferential zigzag rib with a discontinuous reinforcing rib 23 arranged inside.

[0033] In this embodiment, the alternate arrangement of the transverse grooves and transverse steel sheets on the crown rib 32 and the center rib 31 can effectively ensure the grip performance and drainage and stone removal performance at any position of the tire circumferentially, which is beneficial to reducing rolling resistance and improving the wear resistance and operational stability of the tire. Among them, a shoulder pattern block is formed between any two transverse shallow sipes 45, and the transverse shallow sipes 45 on the shoulder ribs 33 on both sides provide creep space for the deformation of the shoulder pattern block when it touches the ground, which is beneficial to reducing the ground pressure of the edge area of ​​the shoulder pattern groove 10 and improving the anti-eccentric wear performance of the shoulder pattern block. Furthermore, the two ends of the transverse shallow sipes 45 on the shoulder rib 33 do not completely penetrate the width of the shoulder rib 33, that is, the shoulder rib 33 is a circumferential continuous rib. Such an arrangement will make the tire look stronger, while improving the overall rigidity and ground contact area of ​​the shoulder pattern block, thereby reducing the ground pressure, reducing rolling resistance, and improving wear resistance. On the other hand, the shoulder grooves 10 are circumferential straight grooves, which can not only increase the drainage performance of the strong tire, but also ensure its straight-line driving stability; the crown grooves 20 are circumferential zigzag grooves with discontinuous reinforcing ribs 23 arranged inside, which can not only increase the drainage performance of the strong tire, but also improve the anti-stone clamping performance and stone clamping self-cleaning performance of the crown grooves 20 on both sides. In summary, this embodiment provides a medium- and long-distance all-wheel position pattern all-steel radial tire that helps to improve comprehensive performance, which can meet the consumer's use needs in medium- and long-distance road conditions and multi-wheel position working conditions, and improves the product's applicability while improving the product's comprehensive performance.

[0034] The ground contact area refers to the actual contact area between the tire and the ground. In the present embodiment, the plurality of shoulder pattern blocks of the shoulder pattern strip 33 are formed on one side, which is beneficial to ensure the structural strength of the shoulder pattern block and the overall rigidity of the shoulder pattern strip 33. When the shoulder pattern block touches the ground, it will be squeezed and deformed and the gap of the horizontal shallow sipe 45 will be compressed, so that the actual contact area with the ground will become larger, which is beneficial to improve the ground contact effect and disperse the reduced ground pressure, reduce rolling resistance and improve wear resistance.

[0035] like Figure 1 As shown, in the circumferential direction of the tread, a shoulder pattern block is formed between any two adjacent shallow transverse grooves 45, and the ratio of the extension lengths of any two adjacent shoulder pattern blocks is 1 to 1.1, and / or, a middle pattern block is formed between any two adjacent transverse grooves, and the ratio of the extension lengths of any two adjacent middle pattern blocks is 1 to 1.1, and the distance between the transverse steel sheet and the two adjacent transverse grooves is the same.

[0036] In this embodiment, the multiple middle pattern blocks on the center pattern strip 31 are center pattern blocks, and any center pattern block is divided into two identical parts by a transverse steel sheet. The multiple middle pattern blocks on the crown pattern strip 32 are crown pattern blocks, and any crown pattern block is divided into two identical parts by a transverse steel sheet. In the circumferential direction of the tread, the ratio of the extension lengths of any two adjacent center pattern blocks is 1 to 1.1, and the ratio of the extension lengths of any two adjacent crown pattern blocks is 1 to 1.1. In this embodiment, the center pattern strip 31, the crown pattern strips 32 on both sides, and the shoulder pattern strips 33 on both sides all adopt a multi-type pattern pitch design, and the distance between any two adjacent transverse grooves is the pattern pitch. The pattern pitch is set according to the above ratio and each pattern pitch is irregularly arranged along the circumferential direction of the tread. Such a setting can effectively reduce the pitch noise caused by pitch resonance, thereby reducing the tire pump noise. Among them, the pattern pitch ratio and circumferential arrangement can be optimally solved through computer simulation calculations.

[0037] It can be understood that the design of the center pattern block and the crown pattern block can also achieve the effect of the shoulder pattern block that is beneficial to increasing the actual ground contact area; the circumferential random arrangement is for the arrangement of any center pattern block, any crown pattern block and any shoulder pattern block in the circumferential direction of the tread; regarding pump noise: during the rotation of the tire, when the tread pattern rolls into the contact surface, the pattern grooves on the tread (including but not limited to the shoulder pattern grooves 10, crown pattern grooves 20, transverse grooves, and transverse shallow knife grooves 45 in this embodiment) will be compressed, and the gas inside the pattern grooves will be squeezed out, and when the pattern rolls away from the contact surface, the pattern grooves will reopen due to the disappearance of the extrusion force, and the gas will be sucked into the pattern grooves again. The repeated compression and opening of the above-mentioned pattern grooves is called the "pump effect", which will produce greater tire noise.

[0038] Preferably, in the width direction of the tread, the multiple transverse grooves on the center rib 31 correspond to the multiple transverse steel sheets on the crown rib 32, the multiple transverse steel sheets on the center rib 31 correspond to the multiple transverse grooves on the crown rib 32, and any transverse shallow sipe 45 corresponds to a transverse groove or a transverse steel sheet; a corresponding group of transverse shallow sipes 45, transverse grooves and transverse steel sheets extend in a wave shape. This arrangement is conducive to further improving the drainage performance and overall strength of the tire, and is also conducive to the arrangement design of each pattern pitch in the circumferential direction.

[0039] like Figure 1As shown, the transverse steel sheet and transverse groove located on the central tread strip 31 are respectively an S-shaped transverse steel sheet 43 and an S-shaped transverse groove 41. The S-shaped transverse groove 41 and the S-shaped transverse steel sheet 43 are centrally symmetrical structures and are parallel to each other. The two ends of the S-shaped transverse groove 41 and the S-shaped transverse steel sheet 43 in the tread width direction respectively extend to the two crown pattern grooves 20 on both sides. The groove width of the S-shaped transverse groove 41 gradually increases in the direction from the middle of the S-shaped transverse groove 41 to the two ends of the S-shaped transverse groove 41.

[0040] In this embodiment, the transverse groove on the central tread strip 31 adopts an S-shaped variable width design, which increases the length of the edge of the central tread block compared to the rectangular constant width groove, which is beneficial to improving the contact effect between the central tread block and the ground, and can effectively improve the driving performance and anti-skid performance of the tire; in addition, the S-shaped design can continuously change the angle of the transverse groove, and the design can ensure that the S-shaped transverse groove 41 enters or leaves the ground state in a progressive manner, thereby reducing the pattern pumping noise. On the other hand, the transverse steel sheet adopts a thinning thickness design, and the transverse steel sheet on the central tread strip 31 adopts an S-shaped design, which not only makes the appearance of the tire pattern more delicate, but also helps to make the two parts of the central tread blocks on both sides of the S-shaped transverse steel sheet 43 more closely combined when grounding (the central tread block will deform and squeeze the gap between the steel sheets when grounding, so that the two parts of the central tread blocks on both sides of the S-shaped transverse steel sheet 43 in the thickness direction can contact each other, and the S-shaped design increases the contact area of ​​the two parts of the central tread blocks on both sides), which is beneficial to improving the overall rigidity of the central tread block and reducing the rolling resistance of the tire. At the same time, the S-shaped design increases the effective length of the steel sheet compared to a single straight steel sheet, which can significantly improve the tire's anti-skid performance.

[0041] Specifically, the transverse steel sheet and transverse groove located on the crown rib 32 are respectively an arc-shaped transverse groove 42 and an arc-shaped transverse steel sheet 44, the arc-shaped transverse groove 42 and the arc-shaped transverse steel sheet 44 are parallel to each other, and the two ends of the arc-shaped transverse groove 42 and the arc-shaped transverse steel sheet 44 in the tread width direction respectively extend to the crown rib 20 and the shoulder rib 10 on both sides, and the groove width of the arc-shaped transverse groove 42 gradually increases in the direction from the crown rib 32 to the center rib 31.

[0042] In this embodiment, an arc-shaped design (circular arc design) is adopted for the transverse grooves on the crown tread strip 32 instead of a straight line design, which increases the length of the edge of the crown tread block, is beneficial to improving the contact effect between the crown tread block and the ground, and can effectively improve the driving performance and anti-skid performance of the tire; in addition, the circular arc design can change the angle of the transverse groove, thereby ensuring that the arc-shaped transverse groove 42 enters or leaves the ground contact state in a progressive manner, thereby reducing the pattern pumping noise. On the other hand, the transverse steel sheet adopts a thinning thickness design, and the transverse steel sheet located on the crown pattern strip 32 adopts an arc design (circular arc design). This arrangement not only makes the appearance of the tire pattern more delicate, but also facilitates the two parts of the crown pattern blocks on both sides of the arc-shaped transverse steel sheet 44 to be more closely combined when grounding (the crown pattern blocks will deform and squeeze the gap between the steel sheets when grounding, so that the two parts of the crown pattern blocks on both sides of the arc-shaped transverse steel sheet 44 in the thickness direction can contact each other, and the arc design increases the contact area of ​​the two parts of the crown pattern blocks on both sides), which is conducive to improving the overall rigidity of the center pattern block and reducing the rolling resistance of the tire. At the same time, the arc design increases the length of the effective steel sheet relative to a single straight steel sheet, which can significantly improve the anti-skid performance of the tire.

[0043] Preferably, in the width direction of the tread, the width of the center rib 31 is A, the width of the crown rib 32 is B, the width of the shoulder rib 33 is C, B = (1.0-1.4) A, and / or, C = (1.0-1.4) A. The ratio of the width of the shoulder groove 10 to the width of the crown groove 20 is 1-1.1. This arrangement is conducive to ensuring the comprehensive performance of the all-steel radial tire.

[0044] In this embodiment, the width of the transverse groove is 1 to 4 mm, and the depth of the transverse groove is 15% of the depth of the shoulder pattern groove 10 and / or the crown pattern groove 20; wherein, the transverse groove is an arc-shaped groove, and for the arc-shaped groove located in the center rib 31, the inclination angle of the tangent at any position in the extension direction relative to the radial cross section of the tire is 50° to 80°; for the arc-shaped groove located in the crown rib 32, the inclination angle of the tangent at any position in the extension direction relative to the radial cross section of the tire is 50° to 85°. The thickness of the transverse steel sheet is less than 0.6 mm, and the depth of the transverse steel sheet is 15% to 35% of the depth of the shoulder pattern groove 10 and / or the crown pattern groove 20; wherein, the transverse steel sheet is an arc-shaped steel sheet, and for the arc-shaped steel sheet located at the center tread 31, the inclination angle of the tangent at any position in its extension direction relative to the radial cross-section of the tire is 50° to 80°; for the arc-shaped steel sheet located at the crown tread 32, the inclination angle of the tangent at any position in its extension direction relative to the radial cross-section of the tire is 50° to 85°.

[0045] Specifically, the depth of the shoulder groove 10 and the depth of the crown groove 20 in this embodiment can be the same, which is convenient for the design of the depth of the transverse groove and the transverse steel sheet. The tangent of the arc-shaped transverse groove 42 at any position in its extension direction relative to the radial section of the tire has an inclination angle of 50° to 85°, the tangent of the arc-shaped transverse steel sheet 44 at any position in its extension direction relative to the radial section of the tire has an inclination angle of 50° to 85°, the tangent of the S-shaped transverse groove 41 at any position in its extension direction relative to the radial section of the tire has an inclination angle of 50° to 80°, and the tangent of the S-shaped transverse steel sheet 43 at any position in its extension direction relative to the radial section of the tire has an inclination angle of 50° to 80°. This arrangement is conducive to further ensuring the grip performance and drainage and stone removal performance at any position in the circumferential direction of the tire. Further, limiting the thickness of the transverse steel sheet is conducive to realizing the thinning thickness design of the transverse steel sheet, which is conducive to improving the overall rigidity of the pattern block and reducing the tire wheel resistance.

[0046] like Figure 1 As shown, in the circumferential direction of the tread, the distance between any two adjacent transverse grooves is the pattern pitch, the crown pattern groove 20 is composed of a plurality of bending segments connected in sequence, the extension length of the bending segment in the circumferential direction of the tread is 1 / 2 of the extension length of the pattern pitch in the circumferential direction of the tread, and the tortuosity of the crown pattern groove 20 corresponds to the arrangement of the pattern pitch. In this embodiment, any bending segment includes a long strip segment and a short strip segment connected to each other, and the extension directions of the long strip segment and the short strip segment are opposite. Such an arrangement is conducive to improving the drainage performance and applicability of the tire. Among them, in this embodiment, the length of a bending segment in the circumferential direction of the tread corresponds to the distance between any two adjacent transverse shallow sipes 45, and / or, the length of a bending segment in the circumferential direction of the tread corresponds to the distance between any two adjacent transverse grooves and transverse steel sheets, and the end of any transverse groove or transverse steel sheet extends to the middle part of the long strip segment of the bending segment. Such an arrangement is conducive to the regular arrangement of the crown pattern groove 20.

[0047] like Figure 1 and Figure 2 As shown, the crown groove 20 adopts a countersunk design, the groove width of the crown groove 20 is 5 to 11 mm, the crown groove 20 includes a crown groove 21 and a crown countersunk groove 22 arranged on the opening of the crown groove 21, the depth of the crown countersunk groove 22 is 3 to 5 mm, the crown groove 21 has two opposite crown groove walls 211 and a crown groove bottom 212, the distance between the two crown groove walls 211 gradually decreases in the direction from the crown countersunk groove 22 to the crown groove bottom 212, and the angle between the two crown groove walls 211 ( Figure 2The angle shown in D in the figure is greater than 30°, the extension direction of the crown countersunk groove 22 is parallel to the extension direction of the crown groove bottom 212, and the crown groove bottom 212 extends along the circumferential bending direction of the tread; the height of the non-continuous reinforcement rib 23 is 2 to 3 mm, and the width is half of the maximum width of the bottom of the crown pattern groove 20.

[0048] In this embodiment, the full tread depth of the crown groove 20 is the sum of the depth of the crown groove 21 and the depth of the crown countersunk groove 22. The crown groove 21 is designed to be greater than 80% of the full tread depth. This design increases the rigidity and anti-cutting performance of the tread blocks on both sides of the crown groove 20 while ensuring the driving performance in the initial stage of use, and can reduce the rolling resistance. On the other hand, the design of the crown countersunk groove 22 effectively increases the draft angle of the groove wall, which is conducive to improving the stability of the tread blocks on both sides of the crown groove 20, and is also conducive to improving the anti-stone clamping performance and stone clamping self-cleaning performance of the crown groove 20. Among them, limiting the groove width of the crown groove 20 is conducive to ensuring the drainage performance and straight-line driving stability of the tire. Limiting the depth of the crown countersunk groove 22 and the angle between the crown groove walls 211 is beneficial to ensuring the reliability of the setting of the draft angle of the crown groove wall 211 and the performance of the pattern block. By limiting the height and width of the discontinuous reinforcement ribs 23, it is beneficial to further ensure the drainage and stone removal performance of the tire.

[0049] like Figure 1 and Figure 3 As shown, the shoulder groove 10 adopts a countersunk design, the groove width of the shoulder groove 10 is 3 to 11 mm, the shoulder groove 10 includes a shoulder groove 11 and a shoulder countersunk groove 12 arranged on the opening of the shoulder groove 11, the depth of the shoulder countersunk groove 12 is 3 to 5 mm, the shoulder groove 11 has two opposite shoulder groove walls 111 and a shoulder groove bottom 112, the distance between the two shoulder groove walls 111 gradually decreases in the direction from the shoulder countersunk groove 12 to the shoulder groove bottom 112, and the angle between the two shoulder groove walls 111 ( Figure 3 The angle shown in E is greater than 25°, the shoulder groove bottom 112 extends in a winding manner along the circumference of the tread, and the shoulder countersunk groove 12 extends in a straight line along the circumference of the tread.

[0050] In this embodiment, the full pattern depth of the shoulder groove 10 is the sum of the depth of the shoulder groove 11 and the depth of the shoulder countersunk groove 12. The shoulder groove 11 is designed to be greater than 80% of the full pattern depth. This design increases the rigidity and anti-cutting performance of the pattern blocks on both sides of the shoulder groove 10 while ensuring the driving performance in the initial stage of use, and can reduce the rolling resistance. On the other hand, the design of the shoulder countersunk groove 12 effectively increases the draft angle of the groove wall, which is conducive to improving the stability of the pattern blocks on both sides of the shoulder groove 10, and is also conducive to improving the anti-stone clamping performance and stone clamping self-cleaning performance of the shoulder groove 10. Among them, limiting the groove width of the shoulder groove 10 is conducive to ensuring the drainage performance and straight-line driving stability of the tire. Limiting the depth of the shoulder countersunk groove 12 and the angle between the shoulder groove wall 111 is conducive to ensuring the reliability of the draft angle setting of the shoulder groove wall 111 and the performance of the pattern block.

[0051] like Figure 1 As shown, a plurality of narrow transverse steel sheets 46 are provided on both sides of the shoulder groove 10 , the extension length of the narrow transverse steel sheets 46 in the tread width direction is 3 to 5 mm, and the depth of the narrow transverse steel sheets 46 is greater than 70% of the depth of the shoulder groove 10 and / or the crown groove 20 .

[0052] In this embodiment, by setting a narrow transverse steel sheet 46, a creep space is provided for the deformation of the shoulder pattern blocks and the crown pattern blocks on both sides of the tire when they touch the ground, thereby reducing the ground contact pressure in the edge area of ​​the shoulder pattern groove 10 and preventing irregular wear. This can effectively improve the tire's anti-eccentric wear and handling stability. At the same time, such a setting is also beneficial to improving the tire's heat dissipation performance and wet grip performance.

[0053] Specifically, the transverse shallow knife groove 45 is an arc-shaped groove, and the inclination angle of the tangent at any position in the extension direction of the transverse shallow knife groove 45 relative to the radial cross-section of the tire is 60° to 90°, the thickness of the transverse shallow knife groove 45 is less than 0.6 mm, and the extension length of the transverse shallow knife groove 45 along the tread width direction is 2 / 3 of the width of the shoulder pattern strip 33.

[0054] In this embodiment, the arc-shaped design of the transverse shallow sipe 45 increases the length of the edge of the shoulder pattern block, which is beneficial to improving the contact effect between the shoulder pattern block and the ground, and is beneficial to improving the driving performance and anti-skid performance of the tire; in addition, the arc design can change the angle of the transverse shallow sipe 45, thereby ensuring that the transverse shallow sipe 45 enters or leaves the ground contact state in a gradual manner, thereby reducing the pattern pumping noise. By designing the inclination angle, thickness, and width of the transverse shallow sipe 45, it is beneficial to further improve the overall rigidity and ground contact area of ​​the shoulder pattern block, further reduce the ground contact pressure, reduce the rolling resistance, and improve the wear resistance. Among them, the proportional relationship between the extension length of the transverse shallow sipe 45 along the tread width direction and the width of the shoulder pattern strip 33 can be designed according to actual conditions and float around 2 / 3 of the above description, and is not necessarily limited to 2 / 3.

[0055] like Figure 1 As shown, the outer edge of the shoulder tread strip 33 has an annular fillet 331, the width of the annular fillet 331 is less than 2 mm, and the radius of the annular fillet 331 is greater than 35 mm. This arrangement reduces the ground contact pressure of the shoulder areas on both sides of the tire during ground contact and steering, and effectively improves the shoulder wear resistance of the shoulder tread strips on both sides.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0059] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

Claims

1. An all-steel radial tire, wherein the tread of the all-steel radial tire has two shoulder grooves (10) and two crown grooves (20) extending in the circumferential direction thereof, the two crown grooves (20) are located between the two shoulder grooves (10), the area between the two crown grooves (20) forms a center rib (31), the area between the crown groove (20) and the shoulder groove (10) adjacent thereto forms a crown rib (32), and the area on the side of the shoulder groove (10) away from the crown groove (20) forms a shoulder rib (33), characterized in that: The central tread strip (31) and the crown tread strip (32) are both provided with a plurality of transverse grooves and a plurality of transverse steel sheets, and the plurality of transverse grooves and the plurality of transverse steel sheets are alternately distributed in the circumferential direction of the tread; the shoulder tread strip (33) is provided with a plurality of transverse shallow sipes (45), one end of the transverse shallow sipes (45) extends to the shoulder tread groove (10), and the other end of the transverse shallow sipes (45) extends to the interior of the shoulder tread strip (33); The shoulder pattern groove (10) is a circumferential straight pattern groove, and the crown pattern groove (20) is a circumferential zigzag pattern groove with a discontinuous reinforcement rib (23) arranged inside.

2. The all-steel radial tire according to claim 1, characterized in that: In the circumferential direction of the tread, a shoulder pattern block is formed between any two adjacent shallow transverse sipes (45), and the ratio of the extension lengths of any two adjacent shoulder pattern blocks is 1 to 1.1, and / or, a middle pattern block is formed between any two adjacent transverse grooves, and the ratio of the extension lengths of any two adjacent middle pattern blocks is 1 to 1.1, and the distance between the transverse steel sheet and the two adjacent transverse grooves is the same.

3. The all-steel radial tire according to claim 1, characterized in that: In the width direction of the tread, the plurality of transverse grooves located on the central tread strip (31) correspond one-to-one to the plurality of transverse steel sheets located on the crown tread strip (32), and the plurality of transverse steel sheets located on the central tread strip (31) correspond one-to-one to the plurality of transverse grooves located on the crown tread strip (32), and any one of the transverse shallow sipes (45) corresponds to one transverse groove or one transverse steel sheet; a corresponding group of the transverse shallow sipes (45), the transverse grooves and the transverse steel sheets extend in a wave shape.

4. The all-steel radial tire according to claim 3, characterized in that: The transverse steel sheet and the transverse groove located on the central tread strip (31) are respectively an S-shaped transverse steel sheet (43) and an S-shaped transverse groove (41); the S-shaped transverse groove (41) and the S-shaped transverse steel sheet (43) are centrally symmetrical structures and are parallel to each other; the two ends of the S-shaped transverse groove (41) and the S-shaped transverse steel sheet (43) in the tread width direction respectively extend to the two crown grooves (20) on both sides; the groove width of the S-shaped transverse groove (41) gradually increases in the direction from the middle of the S-shaped transverse groove (41) to the two ends of the S-shaped transverse groove (41).

5. The all-steel radial tire according to claim 3, characterized in that: The transverse steel sheet and the transverse groove located on the crown rib (32) are respectively an arc-shaped transverse groove (42) and an arc-shaped transverse steel sheet (44); the arc-shaped transverse groove (42) and the arc-shaped transverse steel sheet (44) are parallel to each other; the two ends of the arc-shaped transverse groove (42) and the arc-shaped transverse steel sheet (44) in the tread width direction respectively extend to the crown rib (20) and the shoulder rib (10) on both sides; the groove width of the arc-shaped transverse groove (42) gradually increases in the direction from the crown rib (32) toward the center rib (31).

6. The all-steel radial tire according to claim 1, characterized in that: In the width direction of the tread, the width of the center rib (31) is A, the width of the crown rib (32) is B, and the width of the shoulder rib (33) is C, B = (1.0-1.4) A, and / or C = (1.0-1.4) A.

7. The all-steel radial tire according to claim 1, characterized in that: The ratio of the groove width of the shoulder groove (10) to the groove width of the crown groove (20) is 1 to 1.

1.

8. The all-steel radial tire according to claim 1, characterized in that: The width of the transverse groove is 1 to 4 mm, and the depth of the transverse groove is 15% of the depth of the shoulder pattern groove (10) and / or the crown pattern groove (20); wherein the transverse groove is an arc-shaped groove, and for the arc-shaped groove located in the center rib (31), the inclination angle of the tangent at any position in the extension direction relative to the radial cross section of the tire is 50° to 80°; for the arc-shaped groove located in the crown rib (32), the inclination angle of the tangent at any position in the extension direction relative to the radial cross section of the tire is 50° to 85°.

9. The all-steel radial tire according to claim 1, characterized in that: The thickness of the transverse steel sheet is less than 0.6 mm, and the depth of the transverse steel sheet is 15% to 35% of the depth of the shoulder pattern groove (10) and / or the crown pattern groove (20); wherein the transverse steel sheet is an arc-shaped steel sheet, and for the arc-shaped steel sheet located in the central pattern strip (31), the inclination angle of the tangent at any position in the extension direction relative to the radial cross section of the tire is 50° to 80°; for the arc-shaped steel sheet located in the crown pattern strip (32), the inclination angle of the tangent at any position in the extension direction relative to the radial cross section of the tire is 50° to 85°.

10. The all-steel radial tire according to claim 1, characterized in that: In the circumferential direction of the tread, the distance between any two adjacent transverse grooves is the pattern pitch, the crown pattern groove (20) is composed of a plurality of bending segments connected in sequence, the extension length of the bending segment in the circumferential direction of the tread is 1 / 2 of the extension length of the pattern pitch in the circumferential direction of the tread, and the tortuosity of the crown pattern groove (20) corresponds to the arrangement of the pattern pitch.

11. The all-steel radial tire according to claim 1, characterized in that: The crown groove (20) is designed with a countersunk head. The groove width of the crown groove (20) is 5 to 11 mm. The crown groove (20) comprises a crown groove (21) and a crown countersunk head groove (22) arranged at the opening of the crown groove (21). The depth of the crown countersunk head groove (22) is 3 to 5 mm. The crown groove (21) has two opposite crown groove walls (211) and a crown groove bottom (212). The crown groove (211) has a groove bottom (212) between the two crown groove walls (211). The distance between the crown countersunk groove (22) and the crown groove bottom (212) gradually decreases in the direction from the crown countersunk groove (22) to the crown groove bottom (212); the angle between the two crown groove walls (211) is greater than 30°; the extension direction of the crown countersunk groove (22) is parallel to the extension direction of the crown groove bottom (212); the crown groove bottom (212) bends and extends along the circumferential direction of the tread; the height of the discontinuous reinforcing rib (23) is 2 to 3 mm, and the width is half of the maximum width of the bottom of the crown pattern groove (20).

12. The all-steel radial tire according to claim 1, characterized in that: The shoulder groove (10) adopts a countersunk design, the groove width of the shoulder groove (10) is 3 to 11 mm, the shoulder groove (10) comprises a shoulder groove (11) and a shoulder countersunk groove (12) arranged at the opening of the shoulder groove (11), the depth of the shoulder countersunk groove (12) is 3 to 5 mm, the shoulder groove (11) has two opposite shoulder groove walls (111) and a shoulder groove bottom (112), the distance between the two shoulder groove walls (111) gradually decreases in the direction from the shoulder countersunk groove (12) toward the shoulder groove bottom (112), the angle between the two shoulder groove walls (111) is greater than 25°, the shoulder groove bottom (112) extends in a winding manner along the circumference of the tread, and the shoulder countersunk groove (12) extends in a straight line along the circumference of the tread.

13. The all-steel radial tire according to claim 1, characterized in that: A plurality of narrow transverse steel sheets (46) are arranged on both sides of the shoulder groove (10), the extension length of the narrow transverse steel sheets (46) in the tread width direction is 3 to 5 mm, and the depth of the narrow transverse steel sheets (46) is greater than 70% of the depth of the shoulder groove (10) and / or the crown groove (20).

14. The all-steel radial tire according to claim 1, characterized in that: The transverse shallow sipe (45) is an arc-shaped sipe, and the inclination angle of the tangent at any position in the extension direction of the transverse shallow sipe (45) relative to the radial cross section of the tire is 60° to 90°. The thickness of the transverse shallow sipe (45) is less than 0.6 mm, and the extension length of the transverse shallow sipe (45) along the tread width direction is 2 / 3 of the width of the shoulder rib (33).

15. The all-steel radial tire according to claim 1, characterized in that: The outer edge of the shoulder tread strip (33) has an annular fillet (331), the width of the annular fillet (331) is less than 2 mm, and the radius of the annular fillet (331) is greater than 35 mm.

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