Sipe pattern on low-noise tread pattern for increasing middle and long distance transportation mileage, tread pattern and tire

Abstract

In order to solve the problem, the invention provides the sipe pattern on the low-noise tread pattern for increasing the middle and long distance transportation mileage, the tread pattern and the tire, and the noise level of the tire is increased through the design of the sipe pattern on the pattern strip. The invention relates to a sipe pattern on a low-noise tread pattern for increasing middle and long distance transportation mileage, the tread pattern comprises pattern grooves and pattern strips which are arranged along the circumferential direction of a tire, and the sipe pattern is positioned on the pattern strips of which the two sides are provided with the pattern grooves; the sipe pattern is a first sipe pattern, the first sipe pattern comprises a first inclined sipe, a second inclined sipe and a third inclined sipe, two ends of the first inclined sipe are respectively connected with pattern grooves on two sides of the pattern strip, one end of the second inclined sipe is communicated with the first inclined sipe, the other end of the second inclined sipe is communicated with the third inclined sipe, and one end of the third inclined sipe is communicated with the second inclined sipe; the included angle between the first inclined cutter groove and the transverse direction of the tread pattern of the tire and the included angle between the third inclined cutter groove and the transverse direction of the tread pattern of the tire are 15-20 degrees.

Description

Technical Field

[0001] The invention relates to a guide wheel tire for a load-carrying vehicle, and in particular to a sipe pattern on a low-noise tread pattern and a tread pattern and a tire for improving the mileage of medium and long-distance transportation. Background Art

[0002] The design of the pattern has a huge impact on tire performance, is an important part of ensuring driving safety, and is a very critical design project in the tire product development process.

[0003] With the change of economic situation, European fleets pay more attention to transportation efficiency. In order to maximize their interests, fleets will inevitably require tires to meet labeling laws and have longer transportation distances. More stringent use requirements will inevitably increase the tire tread shoulder-to-shoulder ratio. Low-profile tires can ensure that the height of the carriage is around 3m under the height limit of 4m, fully improving transportation efficiency. Through product technology upgrades and the development of high-end products, we will comprehensively consider the tire's noise, anti-eccentric wear, wet grip, rolling resistance and other performance to drive market sales, which is both an opportunity and a challenge for our company.

[0004] Current status of technical means and products: The current product patterns are outdated, product performance defects are gradually exposed, label performance cannot match that of world-class brands, and it is impossible to seize high-end market share.

[0005] In order to meet market demand, a low-noise tread pattern has been developed to improve the mileage of medium and long-distance transportation. This tread pattern takes into account the tire's noise, wet grip, handling stability and other performance as a whole and is very cost-effective. Summary of the invention

[0006] To solve the above problems, the present invention provides a sipe pattern on a low-noise tread pattern, a tread pattern and a tire for improving medium and long-distance transportation mileage. The sipe pattern design on the tread strip can improve the tire noise level.

[0007] The objective of the present invention is achieved in the following manner: a sipe pattern on a low-noise tread pattern for improving the mileage of medium and long-distance transportation, the tread pattern comprising grooves and ribs arranged along the circumferential direction of the tire, the sipe pattern being located on a rib with grooves on both sides; the sipe pattern being a first sipe pattern, the first sipe pattern comprising a first oblique sipe, a second oblique sipe, and a third oblique sipe, the two ends of the first oblique sipe being respectively connected to the grooves on both sides of the rib, one end of the second oblique sipe being connected to the first oblique sipe, and the other end being connected to the third oblique sipe, one end of the third oblique sipe being connected to the second oblique sipe, and the other end being connected to the grooves on one side of the rib, the angles between the first oblique sipe and the third oblique sipe and the transverse direction of the tire tread pattern are 15-20°.

[0008] A low-noise tread pattern for improving the mileage of medium and long-distance transportation, comprising grooves and ribs arranged along the circumference of the tire; in the width direction, the center of the tread pattern is a central groove, and from the central groove to both sides are respectively provided with a first rib, a middle groove, a second rib, an edge groove, and a third rib, and a first sipe pattern is respectively provided on the first rib and the second rib; The first sipe pattern includes a first oblique sipe, a second oblique sipe, and a third oblique sipe. One end of the first oblique sipe is connected to the center groove or the side groove, and the other end is connected to the middle groove. One end of the second oblique sipe is connected to the first oblique sipe, and the other end is connected to the third oblique sipe. One end of the third oblique sipe is connected to the second oblique sipe, and the other end is connected to the middle groove. The angles between the first oblique sipe and the third oblique sipe and the transverse direction of the tire tread pattern are 15-20°.

[0009] The third tread strip is provided with a second sipe pattern; the second sipe pattern includes a fourth oblique sipe, a fifth oblique sipe, a sixth oblique sipe, a seventh oblique sipe and an eighth oblique sipe, the fourth oblique sipe, the fifth oblique sipe and the sixth oblique sipe are respectively connected with the edge tread grooves, one end of the seventh oblique sipe is connected with an end of the fourth oblique sipe away from the edge tread groove, and the other end is connected with the fifth oblique sipe, one end of the eighth oblique sipe is connected with an end of the sixth oblique sipe away from the edge tread groove, and the other end is connected with the fifth oblique sipe, the seventh oblique sipe and the eighth oblique sipe are connected with each other, and the connecting point is the connecting point with the fifth oblique sipe.

[0010] The tread pattern adopts an equal pitch design or a three-pitch design.

[0011] The middle pattern groove is a zigzag pattern groove; one end of the first oblique knife groove is connected to the central pattern groove or the side pattern groove, and the other end is connected to the bending part of the middle pattern groove; one end of the second oblique knife groove is connected to the first oblique knife groove, and the other end is connected to the third oblique knife groove; one end of the third oblique knife groove is connected to the second oblique knife groove, and the other end is connected to the bending part of the middle pattern groove; and the first oblique knife groove and the third oblique knife groove are connected at two different bending parts of the middle pattern groove.

[0012] There is at least one middle groove bend between two middle groove bends connected by the first bevel groove and the third bevel groove; First sipes are provided on the first tread strip and the second tread strip at intervals along the circumferential direction of the tire; There is at least one middle groove bend between two adjacent first sipes on the first rib; there is at least one middle groove bend between two adjacent first sipes on the second rib; The width ratio of the first pattern stripe to the second pattern stripe is 0.9-1.1, and the width of the third pattern stripe is 1.8-2 times of the first pattern stripe and the second pattern stripe.

[0013] There is a middle groove bend between two middle groove bends connected by the first oblique sipe and the third oblique sipe of the same first sipe pattern on the first tread strip, and the middle groove bends separated here are connected to the first oblique sipe on the adjacent second tread strip, and there is a middle groove bend between two adjacent first sipe patterns on the first tread strip, and there is a middle groove bend between two adjacent first sipe patterns on the second tread strip; In the tire circumferential direction, the first oblique sipes and the third oblique sipes of the same first sipe pattern on the first rib and the adjacent second rib are in opposite vertical positional relationships.

[0014] In the circumferential direction of the tire, on the right side of the center groove, for the same first sipe pattern on the first rib, the first oblique sipe is above the third oblique sipe, and for the same first sipe pattern on the adjacent second rib, the first oblique sipe is below the third oblique sipe; The first oblique cutter groove is arranged in parallel with the third oblique cutter groove, and the length from the connection between the first oblique cutter groove and the middle pattern groove to the connection between the second oblique cutter groove and the first oblique cutter groove is greater than the length of the third oblique cutter groove; The fourth bevel groove, the fifth bevel groove and the sixth bevel groove are arranged in parallel, and the length from the connection between the fifth bevel groove and the edge pattern groove to the connection between the fifth bevel groove and the seventh bevel groove is greater than the length of the fourth bevel groove and also greater than the length of the sixth bevel groove.

[0015] The angle between the first bevel groove and the third bevel groove and the transverse direction of the tire tread pattern is 15-20°. The first bevel groove, the second bevel groove and the third bevel groove are linear grooves with a full rounded bottom and a width range of 0.6-1mm. The depth range of the first bevel groove and the second bevel groove is 2-4mm, and the depth range of the third bevel groove is 10-14mm. The fourth bevel groove has the same length as the sixth bevel groove; The included angles between the fourth bevel groove, the fifth bevel groove, the sixth bevel groove and the transverse direction of the tire tread pattern are 15-20°, the fourth bevel groove, the fifth bevel groove, the sixth bevel groove, the seventh bevel groove and the eighth bevel groove are respectively straight grooves, the bottom of the grooves are fully rounded, and the groove depth ranges from 1.5 to 2.5 mm.

[0016] The side grooves include auxiliary grooves, second supporting ribs, first supporting ribs, and main grooves. From the second rib to the adjacent third rib, they are auxiliary grooves, second supporting ribs, first supporting ribs, and main grooves. The angle between the groove wall of the main groove and the tread normal direction at the position where the upper end of the groove wall is located is 8°-11°. In the transverse section, from the first supporting rib to the second supporting rib, it is connected by an oblique line II inclined in the direction of the second supporting rib outward. The oblique line The angle between Ⅱ and the tread normal direction at the upper end of the oblique line Ⅱ is 8°-11°, the depth L1 of the main groove is 14-16mm, the width of the first supporting rib is 2-3mm, and the depth L2 is 10-13mm; the width W3 of the second supporting rib is 6-8mm, and the depth L3 is 2-4mm; the depth L2 of the auxiliary groove is 10-13mm, and the width W2 is 0.8-1.2mm; the width W1 of the side groove is 15.5-17.5mm; Along the circumferential direction of the tire, the bottom of the center groove is wavy from left to right; in the transverse section, the wall of the center groove gradually tilts outward from bottom to top; The middle groove is a zigzag groove. In the transverse section of the middle groove, the bottom is a "tear drop" design. The bottom of the middle groove is arc-shaped, and the maximum width ranges from 3.5 to 4.3 mm. The middle groove wall, from the top of the arc bottom to the tire tread, is a vertical line and an outward-inclined oblique line III. The width between the vertical groove walls and the inclined groove walls ranges from 0.5 to 2.2 mm.

[0017] The bottom of the auxiliary groove is designed in a "water drop" shape.

[0018] In the transverse cross-sectional view of the edge pattern groove, the bottom of the main pattern groove is designed with full rounded corners, and the side wall away from the first supporting pattern strip forms an outwardly inclined oblique line I from bottom to top, and from the first supporting pattern strip to the second supporting pattern strip, it is connected by an oblique line II inclined outward in the direction of the second supporting pattern strip; and in the transverse cross-sectional view, the main pattern groove is connected to the upper surface of the first supporting pattern strip by a rounded corner, and the first supporting pattern strip and the oblique line II are connected by a rounded corner.

[0019] The center groove and the side groove are straight grooves; The tread pattern is rotated 180° from the left side of the central axis through the center to form the right side pattern; The overall shoulder design is closed, and the contour of the shoulder is arc-shaped.

[0020] The tire tread pattern is the tire tread pattern described above.

[0021] Compared with the prior art, the present invention mainly designs the sipe pattern on the tread strip to improve the noise level of the tire. The tread pattern in the present application adopts an equal pitch design or a three-pitch variable pitch design, which can greatly reduce the noise; the anti-eccentric wear ability of the tire is improved by the groove design and the shoulder profile design; the traction of the tire is improved while ensuring the handling stability of the tire by the design of the straight groove and the zigzag groove; especially the combined design of the sipe pattern and the groove on the tread strip enhances the wet grip performance of the tread pattern, while improving the noise level of the tire, and improving the overall handling stability of the tire. In addition, the present application designs the pattern pitch with equal pitch, so that the noise level reaches Class A.

[0022] In order to enable the tire to be used on medium- and long-distance national roads, and to have a lower noise level and a higher mileage life, the present invention provides a low-noise tread pattern for improving the mileage of medium- and long-distance transportation. The tread pattern has a very high mileage life, and the mileage is improved mainly from the following aspects: (1) The saturation of the tread pattern of the medium- and long-distance series in the prior art is usually about 78%, and the saturation of the tread pattern of the present application is close to 85%, which is a high-saturation pattern; (2) The design form of the tread groove of the present application makes the wear of the tire more uniform, further ensuring the mileage of the tire. The tread pattern design can prevent the high heat generation of the shoulder and crown of the tire during medium- and long-distance transportation, and reduce early damage. The design of the tread pattern takes into account the noise and wet-slip performance of the pattern at the same time, and can make the pattern noise level reach Class A and the wet-slip level reach Class B. The optimized groove design, combined with the design of the crown profile, can improve the tire's anti-eccentric wear performance and improve the tire's handling stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the tread pattern of the present invention.

[0024] Figure 2 It is a schematic diagram of the planar structure of the tread pattern of the present invention.

[0025] Figure 3 It is a schematic diagram of the transverse cross-sectional structure of the crown of the tread pattern of the present invention.

[0026] Figure 4 It is a schematic diagram of the transverse cross-sectional structure of the edge groove.

[0027] Figure 5 It is a schematic diagram of the transverse cross-sectional structure of the middle groove.

[0028] Figure 6 It is a schematic diagram of the transverse cross-sectional structure of the first bevel groove, the second bevel groove, the third bevel groove, the fourth bevel groove, the fifth bevel groove, the sixth bevel groove, the seventh bevel groove or the eighth bevel groove.

[0029] Figure 7 2 is a noise level comparison diagram of the present invention.

[0030] Among them, the first pattern strip 1, the second pattern strip 2, the third pattern strip 3, the center pattern groove 4, the middle pattern groove 5, the edge pattern groove 6, the pattern main groove 61, the first supporting pattern strip 62, the second supporting pattern strip 63, the auxiliary groove 64, the oblique line I 65, the oblique line II 66, the first sipe pattern 7, the first oblique sipe 71, the second oblique sipe 72, the third oblique sipe 73, the second sipe pattern 8, the fourth oblique sipe 81, the fifth oblique sipe 82, the sixth oblique sipe 83, the seventh oblique sipe 84, and the eighth oblique sipe 85. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with specific embodiments. It is necessary to point out that this embodiment is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical personnel skilled in the art can make some non-essential improvements and adjustments based on the above-mentioned contents of the present invention.

[0032] like Figure 1-Figure 7 As shown, a low-noise tread pattern for improving medium and long-distance transportation mileage includes grooves and ribs arranged along the circumference of the tire; in the width direction, the center of the tread pattern is a central groove 4, and from the central groove 4 to both sides are respectively provided with a first rib 1, a middle groove 5, a second rib 2, an edge groove 6, and a third rib 3; the first rib 1 and the second rib 2 are respectively provided with a first sipe pattern 7; the third rib 3 is provided with a second sipe pattern 8.

[0033] The first sipe pattern 7 includes a first oblique sipe 71, a second oblique sipe 72, and a third oblique sipe 73. One end of the first oblique sipe 71 is connected to the center groove 4 or the side groove 6, and the other end is connected to the middle groove 5. One end of the second oblique sipe 72 is connected to the first oblique sipe 71, and the other end is connected to the third oblique sipe 73. One end of the third oblique sipe 73 is connected to the second oblique sipe 72, and the other end is connected to the middle groove 5.

[0034] The middle groove 4 is a zigzag groove; one end of the first oblique groove 71 is connected to the center groove 4 or the side groove 6, and the other end is connected to the bend of the middle groove 5; one end of the second oblique groove 72 is connected to the first oblique groove 71, and the other end is connected to the third oblique groove 73; one end of the third oblique groove 73 is connected to the second oblique groove 72, and the other end is connected to the bend of the middle groove 5, and the first oblique groove 71 and the third oblique groove 73 are connected at two different bends of the middle groove. And the first oblique groove 71 and the third oblique groove 73 do not cross each other.

[0035] There is one middle groove bend between two middle groove bends connected by the first oblique sipe 71 and the third oblique sipe 73 , and there may also be at least two middle groove bends.

[0036] First sipes are provided on the first rib 1 and the second rib 2 at intervals along the circumferential direction of the tire.

[0037] Two adjacent first sipes 7 on the first pattern strip 1 are separated by a bend of the middle pattern groove 5, or by at least two bends of the middle pattern groove; two adjacent first sipes 7 on the second pattern strip 2 are separated by a bend of the middle pattern groove 5, or by at least two bends of the middle pattern groove.

[0038] There is a middle groove bend between two middle groove bends connected by the first oblique groove 71 and the third oblique groove 73 of the same first groove pattern 7 on the first pattern strip 1, and the middle groove bends separated here are connected to the first oblique groove 71 on the adjacent second pattern strip; and there is a middle groove 5 bend between two adjacent first groove patterns 7 on the first pattern strip 1, and there is a middle groove 5 bend between two adjacent first groove patterns 7 on the second pattern strip 2.

[0039] In addition, along the tire circumferential direction, the vertical positional relationship between the first oblique sipe and the third oblique sipe of the same first sipe pattern on the first rib 1 and the adjacent second rib 2 is opposite.

[0040] like Figure 1 As shown, in addition, along the circumference of the tire, on the right side of the center groove, the same first sipe pattern on the first tread strip, the first oblique sipe is above the third oblique sipe, and the same first sipe pattern on the adjacent second tread strip, the first oblique sipe is below the third oblique sipe.

[0041] The first oblique sipe 71 is arranged in parallel with the third oblique sipe 73 , and the length from the connection between the first oblique sipe 71 and the middle groove to the connection between the second oblique sipe 72 and the first oblique sipe 71 is greater than the length of the third oblique sipe 73 .

[0042] The third bevel groove 73 is connected to the 1 / 3-2 / 3 position of the first tread rib or the second tread rib, preferably the 1 / 2 position.

[0043] The angles between the first bevel groove 71 and the third bevel groove 73 and the transverse direction of the tire tread pattern are 15-20°. The first bevel groove 71, the second bevel groove 72 and the third bevel groove 73 are linear grooves with a full rounded bottom and a width range of 0.6-1mm. The depths of the first bevel groove and the second bevel groove are 2-4mm, and the depth of the third bevel groove is 10-14mm.

[0044] The first sipe pattern is designed with multiple steel blade grooves at intervals, which can ensure wet performance while ensuring the overall rigidity of the tread strip, achieving the purpose of "fragile but rigid". Through simulation verification, the design of the steel blade inclination value in the first sipe pattern in this application is beneficial to the noise performance level. In addition, the overall tire pattern has both beautiful appearance, low noise and high mileage performance.

[0045] The second sipe pattern 8 includes a fourth oblique sipe 81, a fifth oblique sipe 82, a sixth oblique sipe 83, a seventh oblique sipe 84, and an eighth oblique sipe 85. The fourth oblique sipe 81, the fifth oblique sipe 82, and the sixth oblique sipe 83 are respectively connected to the edge groove 6. One end of the seventh oblique sipe 84 is connected to an end of the fourth oblique sipe 81 away from the edge groove 6, and the other end is connected to the fifth oblique sipe 82. One end of the eighth oblique sipe 85 is connected to an end of the sixth oblique sipe 83 away from the edge groove 6, and the other end is connected to the fifth oblique sipe 82. The seventh oblique sipe 84 and the eighth oblique sipe 85 are connected to each other, and the connecting point is the connecting point with the fifth oblique sipe 82. The connecting point of the seventh oblique sipe 84 and the fifth oblique sipe 82 is not the end of the fifth oblique sipe 82.

[0046] The fourth bevel groove 81 , the fifth bevel groove 82 , and the sixth bevel groove 83 are arranged in parallel. The length from the connection between the fifth bevel groove 82 and the edge groove 6 to the connection between the fifth bevel groove 82 and the seventh bevel groove 84 is greater than the length of the fourth bevel groove 81 and also greater than the length of the sixth bevel groove 83 .

[0047] The fourth oblique sipe 81 has the same length as the sixth oblique sipe 83. The fifth oblique sipe 82 is connected to the third rib 3 at a position of 1 / 2 to 3 / 5 of the width.

[0048] The cross-sectional shape of the second sipe is similar to a fork shape.

[0049] The design of the shoulder sipes has a great impact on the tire's noise, wet grip and steering performance. It is crucial to meet the performance goals required by customers through the design of the shoulder pattern.

[0050] The second pattern knife groove is composed of the fourth oblique knife groove 81, the fifth oblique knife groove 82, the sixth oblique knife groove 83, the seventh oblique knife groove 84 and the eighth oblique knife groove 85, wherein the fourth oblique knife groove 81, the fifth oblique knife groove 82 and the sixth oblique knife groove 83 are designed to be parallel and have an angle range of 15°-20° with the horizontal axis, the angle range of the seventh oblique knife groove 84 with the vertical direction is 25°-30°, the angle range of the eighth oblique knife groove 85 with the vertical direction is 5°-10°, and the overall width range of the knife groove design is 0.6mm-1mm. Design advantages: 1. Noise reduction: (1) The shoulder design of the tread pattern is a closed shoulder design, which effectively avoids the noise generated by the bell-mouth effect when the tire contacts the road surface. (2) The overall design of the pattern is mostly designed with a groove angle of 15°-20° with the horizontal axis. The fourth oblique groove 81, the fifth oblique groove 82, and the sixth oblique groove 83 of the second groove design of the shoulder are consistent with the groove angle of the middle pattern rib, which reduces the generation of pump noise; (3) The fourth oblique groove 81 and the seventh oblique groove 84 are connected, and the sixth oblique groove 83 and the eighth oblique groove 85 are connected, which reduces the generation of tread pattern amplification. In addition, our simulation verification shows that the design of the shoulder pattern groove angle has little effect on the noise level when the angle between the shoulder pattern groove and the horizontal axis is within the range of 15°-20°. 2. It is beneficial to wet grip performance and tire guidance performance.

[0051] The included angles between the fourth bevel groove, the fifth bevel groove, the sixth bevel groove and the transverse direction of the tire tread pattern are 15-20°, the fourth bevel groove, the fifth bevel groove, the sixth bevel groove, the seventh bevel groove and the eighth bevel groove are respectively straight grooves, the bottom of the grooves are fully rounded, and the groove depth ranges from 1.5 to 2.5 mm.

[0052] The design and orderly arrangement of the first sipe pattern and the second sipe pattern are beneficial to the wet grip performance and noise level of the tire. In addition, the first sipe pattern and the second sipe pattern are formed by cutting the tread strips in multiple pieces using steel sheets, while increasing the saturation of the tread pattern, so that the pattern achieves the purpose of slicing the strips without losing rigidity.

[0053] The edge pattern groove 6 includes a secondary groove 64, a second supporting pattern strip 63, a first supporting pattern strip 62, and a pattern main groove 61. From the second pattern strip 2 to the adjacent third pattern strip 3, the secondary groove 64, the second supporting pattern strip 63, the first supporting pattern strip 62, and the pattern main groove 61 are arranged in sequence; Figure 4 As shown, the angle between the groove wall of the main groove 61 and the tread normal direction at the position where the upper end of the groove wall is located is 8°-11°. In the transverse section, from the first supporting rib 62 to the second supporting rib 63, they are connected by an oblique line Ⅱ66 inclined outwardly in the direction of the second supporting rib 63. The angle between the oblique line Ⅱ66 and the tread normal direction at the position where the upper end of the oblique line Ⅱ66 is located is 8°-11°.

[0054] The design of the edge grooves can prevent the bottom of the grooves from cracking while increasing the stone-removing capacity of the grooves. In addition, the design of the second supporting tread strips can effectively improve the anti-eccentric wear ability of the pattern, thereby increasing the mileage of the pattern.

[0055] In the transverse cross-sectional view of the side groove, the bottom of the auxiliary groove 64 is designed as a "water drop" shape, and the groove wall of the auxiliary groove 64 is a vertical structure from the top of the bottom to the tire tread. This design can prevent stress concentration and cause steel sheet fracture. Figure 4 In the figure, the auxiliary groove 64 is designed as a full arc (indicated by C4), the groove wall is designed as a vertical design, and the groove bottom and the groove wall of the auxiliary groove 64 are transitioned by an arc (indicated by C5 in the figure).

[0056] In the transverse cross-section of the side groove, in order to avoid cracking of the main groove, the bottom of the main groove 6 is designed with full rounded corners ( Figure 4 In the figure, the bottom fillet / arc of the main groove 6 is connected to the side wall of the first supporting rib 62 to form an outwardly inclined oblique line I 65 from bottom to top, and the first supporting rib 62 to the second supporting rib 63 are connected by an outwardly inclined oblique line II 66. In the transverse cross-sectional view, the main groove 61 is connected to the upper surface of the first supporting rib 62 by a fillet (indicated by C2), and the first supporting rib 62 is connected to the oblique line II 66 by a fillet (indicated by C3).

[0057] The depth L1 of the main pattern groove 61 is 14-16mm, the width of the first supporting pattern strip 62 is 2-3mm, and the depth L2 is 10-13mm; the width W3 of the second supporting pattern strip 63 is 6-8mm, and the depth L3 is 2-4mm; the depth L2 of the auxiliary groove 64 is 10-13mm, and the width W2 is 0.8-1.2mm; the width W1 of the edge pattern groove 6 is 15.5-17.5mm.

[0058] Along the tire circumference, the upper surface of the second supporting tread strip 63 is provided with an oblong block, and adjacent oblong blocks are connected by reinforcing ribs, and the design of connecting the oblong blocks by reinforcing ribs is for heat dissipation. The length of the oblong block is 1 / 2-3 / 4 of the pitch length.

[0059] The center groove 4 and the side groove 6 are straight grooves.

[0060] Along the circumferential direction of the tire, the bottom of the central groove 4 is wavy from left to right; in the transverse section, the groove wall of the central groove 4 gradually tilts outward from bottom to top.

[0061] The middle groove is a zigzag groove, which improves the traction of the tire and the handling stability of the tire; Figure 5As shown, in the transverse cross-section of the middle groove 5, the bottom is a "water drop" design, which increases the heat dissipation of the tread while ensuring the saturation of the pattern; the bottom of the middle groove is arc-shaped, and the maximum width range is 3.5-4.3mm. From the top of the arc bottom to the tire tread, there are vertical lines 51 and outwardly inclined oblique lines III 52. This design makes the steel sheets more firmly connected during molding in the mold, and the width between the vertical groove walls and the inclined groove walls ranges from 0.5-2.2mm.

[0062] The width ratio of the first pattern stripe to the second pattern stripe is 0.9-1.1. The width of the third pattern stripe 3 is 1.8-2 times of the first pattern stripe and the second pattern stripe.

[0063] The tread pattern is rotated 180° from the left side of the central axis through the center to form the right side pattern.

[0064] The tire shoulder adopts a closed shoulder design to reduce noise. The contour of the tire shoulder adopts an arc design, which refers to arc B. Figure 3 As shown in the transverse section, the outer contour of the upper surface of the shoulder part (i.e. the tread of the shoulder part) is a curved surface. Figure 3 The arc B is in the middle, the outer contour of the upper surface at the crown position is arc A, arc B is tangent to arc A, and the shoulder position in the prior art is usually designed as a straight line, which is tangent to or intersects with arc A. Therefore, the design of the present application improves the anti-eccentric wear ability of the tire, and adopts an arc design at the intersection of the crown and the sidewall, such as Figure 3 Medium RA reduces stress at the corners of the tread blocks and increases the service life of the tire.

[0065] like Figure 3 As shown in the transverse cross-sectional view, the outer contour of the upper surface of the shoulder part (i.e., the shoulder tread) is arc B, and the outer contour of the upper surface of the crown part (i.e., the crown tread) is arc A. Arc B is tangent to arc A. In the prior art, the shoulder part is usually designed as a straight line, which is tangent to or intersects arc A. Therefore, the design of this application improves the tire's anti-eccentric wear ability, and the outer contour of the upper surface of the shoulder part (i.e., the shoulder tread) adopts an arc design to reduce the stress at the corners of the pattern blocks and increase the service life of the tire. After simulation verification, the tire designed in this application has a more uniform ground contact.

[0066] The saturation of the tread pattern is close to 85%, and the first sipe pattern is provided on the pattern ribs 1 and 2, which improves the overall rigidity of the pattern ribs and ensures the product mileage.

[0067] The present invention mainly improves the noise level of the tire by using the sipe patterns on the tread strips. The tread pattern in the present application adopts an equal pitch design or a three-pitch variable pitch design, which can greatly reduce noise; the tire's anti-biased wear ability is improved by the groove design and the shoulder profile design; the design of the straight grooves and the zigzag grooves improves the traction of the tire while ensuring the handling stability of the tire; especially the combined design of the sipe patterns and the grooves on the tread strips enhances the wet grip performance of the tread pattern, while improving the noise level of the tire, and improving the handling stability of the tire as a whole. In addition, Figure 7 As shown, the tread pattern in the present application adopts an equal pitch design or a three-variable pitch design, which can greatly reduce noise. In particular, the present application adopts an equal pitch design for the pattern pitch, and the pitch number ranges from 94 to 100, so that the noise level reaches Class A.

[0068] In order to enable the tire to be used on medium- and long-distance national roads, and to have a lower noise level and a higher mileage life, the present invention provides a low-noise tread pattern for improving the mileage of medium- and long-distance transportation, and the tread pattern has a very high mileage life. The tread pattern design can prevent the tire from generating high heat in the shoulder and crown during medium- and long-distance transportation, and reduce early damage. The design of the tread pattern takes into account the noise and wet-slip performance of the pattern at the same time, and can make the pattern noise level reach Class A and the wet-slip level reach Class B. The optimized groove design, combined with the crown profile design, can improve the tire's anti-eccentric wear performance and improve the tire's handling stability.

[0069] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for those skilled in the art and any technician familiar with the technical field, without departing from the overall concept of the present invention, the technical solution and the inventive concept of the present invention are equivalently replaced or changed, and several changes and improvements are made, which should also be regarded as the protection scope of the present invention.

Claims

1. A sipe pattern on a low-noise tread pattern for improving medium and long-distance transportation mileage, characterized in that: The tread pattern comprises grooves and ribs arranged along the circumferential direction of the tire, wherein the sipe pattern is located on a rib having grooves on both sides thereof; the sipe pattern is a first sipe pattern (7), wherein the first sipe pattern (7) comprises a first oblique sipe (71), a second oblique sipe (72), and a third oblique sipe (73); the first oblique sipe (71) has two ends connected to the grooves on both sides of the rib, one end of the second oblique sipe (72) is connected to the first oblique sipe (71), and the other end is connected to the third oblique sipe (73); one end of the third oblique sipe (73) is connected to the second oblique sipe (72), and the other end is connected to the groove on one side of the rib; and the angle between the first oblique sipe (71) and the third oblique sipe (73) and the tread pattern of the tire in a transverse direction is 15-20 degrees.

2. A low-noise tread pattern for improving medium and long-distance transportation mileage, characterized in that: The tire comprises grooves and ribs arranged along the circumference of the tire; in the width direction, the center of the tread pattern is a central groove (4), and from the central groove (4) to both sides are respectively provided with a first rib (1), a middle groove (5), a second rib (2), an edge groove (6), and a third rib (3); and first sipes (7) are respectively provided on the first rib (1) and the second rib (2); The first sipe pattern (7) comprises a first oblique sipe (71), a second oblique sipe (72), and a third oblique sipe (73); one end of the first oblique sipe (71) is connected to the central groove (4) or the side groove (6), and the other end is connected to the middle groove (5); one end of the second oblique sipe (72) is connected to the first oblique sipe (71), and the other end is connected to the third oblique sipe (73); one end of the third oblique sipe (73) is connected to the second oblique sipe (72), and the other end is connected to the middle groove (5); and the angles between the first oblique sipe (71) and the third oblique sipe (73) and the tire tread pattern in a transverse direction are 15-20 degrees.

3. The low-noise tread pattern for improving medium and long-distance transportation mileage according to claim 2 is characterized in that: The third tread strip (3) is provided with a second sipe pattern (8); the second sipe pattern (8) comprises a fourth oblique sipe (81), a fifth oblique sipe (82), a sixth oblique sipe (83), a seventh oblique sipe (84), and an eighth oblique sipe (85); the fourth oblique sipe (81), the fifth oblique sipe (82), and the sixth oblique sipe (83) are respectively connected to the edge pattern groove (6); one end of the seventh oblique sipe (84) is connected to an end of the fourth oblique sipe (81) away from the edge pattern groove (6), and the other end is connected to the fifth oblique sipe (82); one end of the eighth oblique sipe (85) is connected to an end of the sixth oblique sipe (83) away from the edge pattern groove (6), and the other end is connected to the fifth oblique sipe (82); the seventh oblique sipe (84) and the eighth oblique sipe (85) are connected to each other, and the connecting point is the connecting point with the fifth oblique sipe (82).

4. The low-noise tread pattern for improving medium and long-distance transportation mileage according to claim 2 or 3, characterized in that: The tread pattern adopts an equal pitch design or a three-pitch design.

5. The low-noise tread pattern for improving medium and long-distance transportation mileage according to claim 2 or 3, characterized in that: The middle pattern groove (4) is a zigzag pattern groove; one end of the first oblique knife groove (71) is connected to the central pattern groove (4) or the side pattern groove (6), and the other end is connected to the bending part of the middle pattern groove (5); one end of the second oblique knife groove (72) is connected to the first oblique knife groove (71), and the other end is connected to the third oblique knife groove (73); one end of the third oblique knife groove (73) is connected to the second oblique knife groove (72), and the other end is connected to the bending part of the middle pattern groove (5); and the first oblique knife groove (71) and the third oblique knife groove (73) are connected at two different bending parts of the middle pattern groove; The side pattern groove (6) comprises a secondary groove (64), a second supporting pattern rib (63), a first supporting pattern rib (62), and a pattern main groove (61). From the second pattern rib (2) to the adjacent third pattern rib (3), the secondary groove (64), the second supporting pattern rib (63), the first supporting pattern rib (62), and the pattern main groove (61) are arranged in sequence; the angle between the groove wall of the pattern main groove (61) and the tread normal direction at the position where the upper end of the groove wall is located is 8°-11°. In the transverse section, from the first supporting pattern rib (62) to the second supporting pattern rib (63), the second supporting pattern rib (62) is extended outwardly through the second supporting pattern rib (61). 3) connected by an inclined oblique line II (66) in a direction, the angle between the oblique line II (66) and the tread normal direction at the position where the upper end of the oblique line II is located is 8°-11°, the depth L1 of the main groove (61) is 14-16 mm, the width of the first supporting rib (62) is 2-3 mm, and the depth L2 is 10-13 mm; the width W3 of the second supporting rib (63) is 6-8 mm, and the depth L3 is 2-4 mm; the depth L2 of the auxiliary groove (64) is 10-13 mm, and the width W2 is 0.8-1.2 mm; the width W1 of the side groove (6) is 15.5-17.5 mm; Along the circumferential direction of the tire, the bottom of the central groove (4) is wavy in shape from left to right; in the transverse section, the groove wall of the central groove (4) gradually slopes outward from bottom to top; The middle groove is a zigzag groove. In the transverse cross-sectional view of the middle groove (5), the bottom is a "water drop" design. The bottom of the middle groove is arc-shaped, and the maximum width ranges from 3.5 to 4.3 mm. The groove wall of the middle groove (5) is a vertical line and an outwardly inclined oblique line III from the top of the arc-shaped bottom to the tire tread. The width between the vertical groove walls and the inclined groove walls ranges from 0.5 to 2.2 mm.

6. The low-noise tread pattern for improving medium and long-distance transportation mileage according to claim 5, characterized in that: There is at least one middle groove bend between two middle groove bends connected by the first bevel groove (71) and the third bevel groove (73); First sipe patterns are provided on the first tread strip (1) and the second tread strip (2) at intervals along the circumferential direction of the tire; At least one bending part of the middle pattern groove (5) is spaced between two adjacent first sipes (7) on the first pattern strip (1); at least one bending part of the middle pattern groove (5) is spaced between two adjacent first sipes (7) on the second pattern strip (2); The ratio of the width of the first pattern strip (1) to the width of the second pattern strip (2) is 0.9-1.1, and the width of the third pattern strip (3) is 1.8-2 times that of the first pattern strip and the second pattern strip; The bottom of the auxiliary groove (64) is designed in a "water drop" shape; In the transverse cross-sectional view of the edge pattern groove, the bottom of the pattern main groove (6) is designed with a full rounded corner, and the side wall away from the first supporting pattern strip (62) forms an outwardly inclined oblique line I (65) from bottom to top, and the first supporting pattern strip (62) and the second supporting pattern strip (63) are connected by an oblique line II (66) inclined outwardly in the direction of the second supporting pattern strip (63); and in the transverse cross-sectional view, the pattern main groove (61) and the upper surface of the first supporting pattern strip (62) are connected by a rounded corner, and the first supporting pattern strip (62) and the oblique line II (66) are connected by a rounded corner; The central groove (4) and the side groove (6) are straight grooves; The tread pattern is rotated 180° from the left side of the central axis through the center to form the right side pattern; The overall shoulder design is closed, and the contour of the shoulder is arc-shaped.

7. The low-noise tread pattern for improving medium and long-distance transportation mileage according to claim 2 or 3, characterized in that: A middle groove bend is separated between two middle groove bends connected by the first oblique sipe (71) and the third oblique sipe (73) of the same first sipe pattern (7) on the first tread strip (1); the middle groove bends separated here are connected to the first oblique sipe (71) on the adjacent second tread strip; and a middle groove (5) bend is separated between two adjacent first sipe patterns (7) on the first tread strip (1); and a middle groove (5) bend is separated between two adjacent first sipe patterns (7) on the second tread strip (2); Along the circumferential direction of the tire, the first oblique sipe and the third oblique sipe of the same first sipe pattern on the first rib (1) and the adjacent second rib (2) have opposite vertical positional relationships.

8. The low-noise tread pattern for improving medium and long-distance transportation mileage according to claim 1, characterized in that: In the circumferential direction of the tire, on the right side of the center groove, for the same first sipe pattern on the first rib, the first oblique sipe is above the third oblique sipe, and for the same first sipe pattern on the adjacent second rib, the first oblique sipe is below the third oblique sipe; The first oblique sipe (71) and the third oblique sipe (73) are arranged in parallel, and the length from the connection between the first oblique sipe (71) and the middle tread groove to the connection between the second oblique sipe (72) and the first oblique sipe (71) is greater than the length of the third oblique sipe (73); The fourth oblique knife groove (81), the fifth oblique knife groove (82), and the sixth oblique knife groove (83) are arranged in parallel, and the length from the connection point of the fifth oblique knife groove (82) and the edge pattern groove (6) to the connection point of the fifth oblique knife groove (82) and the seventh oblique knife groove (84) is greater than the length of the fourth oblique knife groove (81) and also greater than the length of the sixth oblique knife groove (83).

9. The low-noise tread pattern for improving medium and long-distance transportation mileage according to claim 1, characterized in that: The first oblique knife groove (71), the second oblique knife groove (72), and the third oblique knife groove (73) are linear grooves, the bottom of the grooves are designed with full rounded corners, and the width ranges from 0.6 to 1 mm; the depth ranges of the first oblique knife groove and the second oblique knife groove are from 2 to 4 mm, and the depth range of the third oblique knife groove is from 10 to 14 mm; The fourth bevel groove (81) and the sixth bevel groove (83) have the same length; The included angles between the fourth bevel groove, the fifth bevel groove, the sixth bevel groove and the transverse direction of the tire tread pattern are 15-20°, the fourth bevel groove, the fifth bevel groove, the sixth bevel groove, the seventh bevel groove and the eighth bevel groove are respectively straight grooves, the bottom of the grooves are fully rounded, and the groove depth ranges from 1.5 to 2.5 mm.

10. A low-noise tire for increasing medium and long-distance transportation mileage, characterized in that: The tire tread pattern is the tread pattern described in any one of claims 2 to 9.

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