A kind of sipe on low noise tread pattern for improving long distance transport mileage and tread pattern and tire

Abstract

To solve the above problems, the application provides a kind of sipe pattern on low-noise tread pattern for improving medium and long distance transport mileage and tire, by sipe pattern design on pattern bar, so that the noise level of tire is improved.A kind of sipe pattern on low-noise tread pattern for improving medium and long distance transport mileage, the tread pattern includes pattern groove and pattern bar arranged along the circumference of tire, and the sipe pattern is located on the pattern bar with pattern groove on both sides;The sipe pattern is first sipe pattern, and the first sipe pattern includes first inclined sipe, second inclined sipe and third inclined sipe, the first inclined sipe is connected with the pattern groove on both sides of the pattern bar at both ends, the second inclined sipe is communicated with the first inclined sipe at one end, and the third inclined sipe is communicated with the pattern groove on one side of the pattern bar at the other end, the included angle between the first inclined sipe and the third inclined sipe and the transverse direction of tire tread pattern is 15-20 °.

Description

TECHNICAL FIELD

[0001] The present application relates to a heavy vehicle guide wheel tire, in particular to a sipe and tire tread pattern on a low noise tread pattern for improving medium and long distance transportation mileage. BACKGROUND

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

[0003] With the change of economic situation, European truck fleets pay more attention to transportation efficiency. In order to maximize the interests, the truck fleet will inevitably require the tire to meet the label law while having a longer transportation distance. More demanding use will inevitably increase the shoulder empty ratio of the tire pattern. Low flat tire can ensure the height of the carriage at about 3m under the condition of limiting height of 4m, fully improving the transportation efficiency. Through product technology upgrading and research and development of high-end products, the performance of the tire such as noise, anti-deviation, wet grip, rolling resistance and the like is comprehensively considered to drive the sales volume of the market, which is an opportunity and a challenge for our company.

[0004] Current product status of current technology: the current product pattern is old, the product performance defects are gradually exposed, the label performance cannot match the world-class brands, and the high-end market share cannot be occupied.

[0005] In order to meet the market demand, a low noise tread pattern for improving medium and long distance transportation mileage is developed. The tread pattern considers the performance of the tire such as noise, wet grip, handling stability and the like and has high cost performance. SUMMARY

[0006] In order to solve the above problems, the present application provides a sipe and tire tread pattern on a low noise tread pattern for improving medium and long distance transportation mileage, which improves the noise level of the tire through the design of the sipe on the pattern bar.

[0007] The purpose of the present application is achieved in the following manner: a sipe on a low noise tread pattern for improving medium and long distance transportation mileage, the tread pattern comprising pattern grooves and pattern bars arranged along the circumference of the tire, and the sipe being arranged on the pattern bar with pattern grooves on both sides; the sipe is a first sipe, the first sipe comprising a first inclined sipe, a second inclined sipe and a third inclined sipe, the first inclined sipe being connected to the pattern grooves on both sides of the pattern bar at both ends, the second inclined sipe being connected to the first inclined sipe at one end and to the third inclined sipe at the other end, the third inclined sipe being connected to the second inclined sipe at one end and to the pattern groove on one side of the pattern bar at the other end, and the included angle between the first inclined sipe and the third inclined sipe and the tire tread pattern transversely being 15-20°.

[0008] A low-noise tread pattern for improving long-distance transportation mileage, comprising a pattern groove and a pattern bar arranged along the tire circumferential direction; in the width direction, the center of the tread pattern is a center pattern groove, and from the center pattern groove to both sides are respectively provided with a first pattern bar, a middle pattern groove, a second pattern bar, an edge pattern groove, and a third pattern bar, and the first pattern bar and the second pattern bar are respectively provided with a first sipe;

[0009] The first sipe comprises a first inclined sipe, a second inclined sipe, and a third inclined sipe, one end of the first inclined sipe is communicated with the center pattern groove or the edge pattern groove, the other end is communicated with the middle pattern groove, one end of the second inclined sipe is communicated with the first inclined sipe, the other end is communicated with the third inclined sipe, one end of the third inclined sipe is communicated with the second inclined sipe, and the other end is communicated with the middle pattern groove, and the included angle between the first inclined sipe and the third inclined sipe and the transverse direction of the tire tread pattern is 15-20°.

[0010] The third pattern bar is provided with a second sipe; the second sipe comprises a fourth inclined sipe, a fifth inclined sipe, a sixth inclined sipe, a seventh inclined sipe, and an eighth inclined sipe, the fourth inclined sipe, the fifth inclined sipe, and the sixth inclined sipe are respectively communicated with the edge pattern groove, one end of the seventh inclined sipe is communicated with the end of the fourth inclined sipe away from the edge pattern groove, the other end is communicated with the fifth inclined sipe, one end of the eighth inclined sipe is communicated with the end of the sixth inclined sipe away from the edge pattern groove, the other end is communicated with the fifth inclined sipe, the seventh inclined sipe and the eighth inclined sipe are communicated with each other, and the communication position is the communication position with the fifth inclined sipe.

[0011] The tread pattern adopts an equal pitch design or a three-pitch design.

[0012] The middle pattern groove is a zigzag pattern groove; one end of the first inclined sipe is communicated with the center pattern groove or the edge pattern groove, the other end is communicated with the bending position of the middle pattern groove, one end of the second inclined sipe is communicated with the first inclined sipe, the other end is communicated with the third inclined sipe, one end of the third inclined sipe is communicated with the second inclined sipe, and the other end is communicated with the bending position of the middle pattern groove, and the first inclined sipe and the third inclined sipe are connected at two different bending positions of the middle pattern groove.

[0013] The two bending positions of the middle pattern groove connected by the first inclined sipe and the third inclined sipe are separated by at least one bending position of the middle pattern groove;

[0014] The first pattern bar and the second pattern bar are respectively provided with a first sipe along the tire circumferential direction;

[0015] The first sipe on the first pattern bar and the first sipe on the second pattern bar are respectively provided with a first sipe along the tire circumferential direction;

[0016] The width ratio of the first pattern strip and the second pattern strip is 0.9-1.1, and the width of the third pattern strip is 1.8-2 times that of the first pattern strip and the second pattern strip.

[0017] The two middle groove bends connected by the first bevel groove and the third bevel groove of the same first sipe on the first pattern strip are separated by one middle groove bend, and the middle groove bends separated here are connected with the first bevel groove on the adjacent second pattern strip, and the first sipe on the first pattern strip is separated by one middle groove bend from the first sipe on the adjacent second pattern strip.

[0018] In the tire circumferential direction, the upper and lower positions of the first bevel groove and the third bevel groove of the same first sipe on the first pattern strip and the adjacent second pattern strip are opposite.

[0019] In the tire circumferential direction, on the right side of the center groove, the first bevel groove of the same first sipe on the first pattern strip is above the third bevel groove, and the first bevel groove of the same first sipe on the adjacent second pattern strip is below the third bevel groove.

[0020] The first bevel groove and the third bevel groove are arranged in parallel, and the length from the connection of the first bevel groove and the middle groove to the connection of the second bevel groove and the first bevel groove is greater than the length of the third bevel groove.

[0021] The fourth bevel groove, the fifth bevel groove, and the sixth bevel groove are arranged in parallel, and the length from the connection of the fifth bevel groove and the edge groove to the connection of the fifth bevel groove and the seventh bevel groove is greater than the length of the fourth bevel groove and the length of the sixth bevel groove.

[0022] The included angle between the first bevel groove, the third bevel groove, and the tire tread pattern transverse direction is 15-20°, the first bevel groove, the second bevel groove, and the third bevel groove are straight grooves, the groove bottom is designed as a full round angle, and the width range is 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.

[0023] The fourth bevel groove and the sixth bevel groove have the same length.

[0024] The included angle between the fourth bevel groove, the fifth bevel groove, and the sixth bevel groove and the tire tread pattern transverse direction is 15-20°, the fourth bevel groove, the fifth bevel groove, the sixth bevel groove, the seventh bevel groove, and the eighth bevel groove are straight grooves, the groove bottom is designed as a full round angle, and the groove depth range is 1.5-2.5mm.

[0025] The edge pattern groove comprises a secondary groove, a second supporting pattern bar, a first supporting pattern bar, and a pattern main groove. In the direction from the second pattern bar to the adjacent third pattern bar, they are sequentially the secondary groove, the second supporting pattern bar, the first supporting pattern bar, and the pattern main groove. The angle between the groove wall of the pattern main groove and the position of the upper end of the groove wall in the direction of the tire normal is 8°-11°. In the transverse cross-section, from the first supporting pattern bar to the second supporting pattern bar, they are connected by the oblique line II which is inclined outward in the direction of the second supporting pattern bar. The angle between the oblique line II and the position of the upper end of the oblique line II in the direction of the tire normal is 8°-11°. The depth L1 of the pattern main groove is 14-16 mm. The width of the first supporting pattern bar is 2-3 mm, and the depth L2 is 10-13 mm. The width W3 of the second supporting pattern bar is 6-8 mm, and the depth L3 is 2-4 mm. The depth L2 of the secondary groove is 10-13 mm, and the width W2 is 0.8-1.2 mm. The width W1 of the edge pattern groove is 15.5-17.5 mm.

[0026] In the circumferential direction of the tire, the bottom of the center pattern groove is left and right wavy. In the transverse cross-section, the groove wall of the center pattern groove is gradually inclined outward from the bottom to the top.

[0027] The middle pattern groove is a zigzag pattern groove. In the transverse cross-section of the middle pattern groove, the bottom is designed as a "water drop type". The bottom of the middle pattern groove is arc-shaped, and the maximum width is 3.5-4.3 mm. From the arc-shaped bottom to the top of the tire tread, the groove wall of the middle pattern groove is sequentially a vertical line and an outwardly inclined oblique line III. The width between the vertical groove walls and the width between the inclined groove walls are 0.5-2.2 mm.

[0028] The bottom of the secondary groove is designed as a "water drop type".

[0029] In the transverse cross-section of the edge pattern groove, the bottom of the pattern main groove is designed as a full round corner. The side wall away from the first supporting pattern bar is formed as an outwardly inclined oblique line I from the bottom to the top. From the first supporting pattern bar to the second supporting pattern bar, they are connected by the oblique line II which is inclined outward in the direction of the second supporting pattern bar. Moreover, in the transverse cross-section, the pattern main groove and the upper surface of the first supporting pattern bar are connected by a round corner, and the first supporting pattern bar and the oblique line II are connected by a round corner.

[0030] The center pattern groove and the edge pattern groove are straight-line pattern grooves.

[0031] The tire tread pattern is formed by rotating the left side pattern of the center axis by 180° to form the right side pattern.

[0032] The overall shoulder adopts a closed shoulder design. The contour of the shoulder part adopts an arc design.

[0033] The tire tread pattern is the tire tread pattern described above.

[0034] With respect to the prior art, the present application is mainly designed by the sipe on the pattern bar, so that the tire noise level is improved, the tread pattern in the application adopts equal pitch design or variable pitch design, which can greatly reduce noise; the anti-deviation wear resistance of the tire is improved by the design of the pattern groove and the shoulder contour; the traction of the tire is improved while the control stability of the tire is ensured by the design of the straight pattern groove combined with the zigzag pattern groove; especially the combination design of the sipe on the pattern bar and the pattern groove enhances the wet grip performance of the tread pattern, improves the noise level of the tire, and improves the control stability of the tire as a whole. In addition, the equal pitch design of the pattern pitch makes the noise level reach A level.

[0035] In order to make the tire be able to be used on the national road surface in the middle and long distance, and need to have lower noise level and higher mileage life, the present application provides a low noise tread pattern for improving the mileage of the middle and long distance transportation, which has very high mileage life, and the improvement of the mileage is mainly from the following aspects: (1) the saturation of the existing technology middle and long distance series tread pattern 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 pattern groove of the present application makes the wear of the tire more uniform, and further ensures the driving mileage of the tire. The design of the tread pattern can avoid high heat generation of the shoulder and the crown during the middle and long distance transportation of the tire, and reduce the early damage. The design of the tread pattern considers the noise and wet slip performance of the pattern at the same time, so that the pattern noise level can reach A level, and the wet slip level can reach B level. The optimized pattern groove design combined with the design of the crown contour can improve the anti-deviation wear performance of the tire, and improve the control stability of the tire. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the three-dimensional structure of the tread pattern of the present application.

[0037] Figure 2 is a schematic diagram of the planar structure of the tread pattern of the present application.

[0038] Figure 3 is a schematic diagram of the crown transverse cross-sectional structure of the tread pattern of the present application.

[0039] Figure 4 is a schematic diagram of the transverse cross-sectional structure of the shoulder pattern groove.

[0040] Figure 5 is a schematic diagram of the transverse cross-sectional structure of the middle pattern groove.

[0041] Figure 6 is a schematic diagram of the transverse cross-sectional structure of the first, second, third, fourth, fifth, sixth, seventh or eighth inclined sipe.

[0042] Figure 7 is a noise level contrast chart of the present application.

[0043] Wherein, the first pattern bar 1, the second pattern bar 2, the third pattern bar 3, the center pattern groove 4, the middle pattern groove 5, the edge pattern groove 6, the pattern main groove 61, the first support pattern bar 62, the second support pattern bar 63, the auxiliary groove 64, the diagonal line I 65, the diagonal line II 66, the first sipe pattern 7, the first diagonal sipe 71, the second diagonal sipe 72, the third diagonal sipe 73, the second sipe pattern 8, the fourth diagonal sipe 81, the fifth diagonal sipe 82, the sixth diagonal sipe 83, the seventh diagonal sipe 84, the eighth diagonal sipe 85. DETAILED DESCRIPTION

[0044] The present application will be described in detail below with specific examples. It is necessary to point out here that the examples are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments according to the content of the present application described above.

[0045] As shown in Figures 1-7 a low-noise tread pattern for improving medium and long-distance transportation mileage, comprising pattern grooves and pattern bars arranged along the circumference of the tire; in the width direction, the center of the tread pattern is the center pattern groove 4, and on both sides of the center pattern groove 4, there are the first pattern bar 1, the middle pattern groove 5, the second pattern bar 2, the edge pattern groove 6, and the third pattern bar 3, respectively; the first sipe pattern 7 is arranged on the first pattern bar 1 and the second pattern bar 2, respectively; and the second sipe pattern 8 is arranged on the third pattern bar 3.

[0046] The first sipe pattern 7 includes the first diagonal sipe 71, the second diagonal sipe 72, and the third diagonal sipe 73; one end of the first diagonal sipe 71 communicates with the center pattern groove 4 or the edge pattern groove 6, and the other end communicates with the middle pattern groove 5; one end of the second diagonal sipe 72 communicates with the first diagonal sipe 71, and the other end communicates with the third diagonal sipe 73; one end of the third diagonal sipe 73 communicates with the second diagonal sipe 72, and the other end communicates with the middle pattern groove 5.

[0047] The middle pattern groove 4 is a zigzag pattern groove; one end of the first diagonal sipe 71 communicates with the center pattern groove 4 or the edge pattern groove 6, and the other end communicates with the bending part of the middle pattern groove 5; one end of the second diagonal sipe 72 communicates with the first diagonal sipe 71, and the other end communicates with the third diagonal sipe 73; one end of the third diagonal sipe 73 communicates with the second diagonal sipe 72, and the other end communicates with the bending part of the middle pattern groove 5; and the first diagonal sipe 71 and the third diagonal sipe 73 are connected at two different bending parts of the middle pattern groove. Moreover, the first diagonal sipe 71 and the third diagonal sipe 73 do not intersect.

[0048] The two bends in the middle pattern grooves connecting the first oblique groove 71 and the third oblique groove 73 can be separated by one bend in the middle pattern groove, or by at least two bends in the middle pattern grooves.

[0049] The first tread pattern 1 and the second tread pattern 2 are respectively provided with first sipes at intervals along the circumference of the tire.

[0050] On the first pattern strip 1, two adjacent first groove patterns 7 are separated by a bend in the middle pattern groove 5, or they can be separated by at least two bends in the middle pattern groove; on the second pattern strip 2, two adjacent first groove patterns 7 are separated by a bend in the middle pattern groove 5, or they can be separated by at least two bends in the middle pattern groove.

[0051] The two bends of the middle pattern grooves 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 are separated by a bend of the middle pattern groove. This bend of the middle pattern groove connects to the first oblique groove 71 on the adjacent second pattern strip. Moreover, there is a bend of the middle pattern groove 5 between two adjacent first groove patterns 7 on the first pattern strip 1, and there is a bend of the middle pattern groove 5 between two adjacent first groove patterns 7 on the second pattern strip 2.

[0052] Furthermore, along the tire circumference, the vertical positions of the first oblique groove and the third oblique groove of the same first groove pattern on the first tread 1 and the adjacent second tread 2 are opposite.

[0053] like Figure 1 As shown, along the tire circumference, to the right of the center tread groove, the first slanted slant on the first tread strip is above the third slanted slant, and the first slanted slant on the adjacent second tread strip is below the third slanted slant.

[0054] The first oblique groove 71 and the third oblique groove 73 are arranged in parallel. The length from the connection point of the first oblique groove 71 and the middle pattern groove to the connection point of the second oblique groove 72 and the first oblique groove 71 is greater than the length of the third oblique groove 73.

[0055] The third oblique groove 73 is connected to the first or second patterned strip at a position of 1 / 3 to 2 / 3, preferably at 1 / 2.

[0056] The angle between the first oblique groove 71 and the third oblique groove 73 and the lateral direction of the tire tread pattern is 15-20°. The first oblique groove 71, the second oblique groove 72, and the third oblique groove 73 are straight grooves with a fully rounded bottom and a width ranging from 0.6 to 1 mm. The depth of the first oblique groove and the second oblique groove ranges from 2 to 4 mm, and the depth of the third oblique groove ranges from 10 to 14 mm.

[0057] The interval design of the plurality of steel piece sipes in the first sipe can ensure the wet skid resistance performance and the overall rigidity of the pattern bar, so as to achieve the purpose of being broken and rigid. Through simulation verification, the design of the steel piece inclination value in the first sipe in the application is beneficial to the noise performance level. In addition, the overall tire pattern has the performance of being beautiful, low noise and high mileage.

[0058] The second sipe 8 includes a fourth inclined sipe 81, a fifth inclined sipe 82, a sixth inclined sipe 83, a seventh inclined sipe 84, and an eighth inclined sipe 85. The fourth inclined sipe 81, the fifth inclined sipe 82, and the sixth inclined sipe 83 are respectively communicated with the edge pattern groove 6. One end of the seventh inclined sipe 84 is communicated with one end of the fourth inclined sipe 81 away from the edge pattern groove 6, and the other end is communicated with the fifth inclined sipe 82. One end of the eighth inclined sipe 85 is communicated with one end of the sixth inclined sipe 83 away from the edge pattern groove 6, and the other end is communicated with the fifth inclined sipe 82. The seventh inclined sipe 84 and the eighth inclined sipe 85 are communicated with each other, and the communication position is the communication position with the fifth inclined sipe 82. The communication position of the seventh inclined sipe 84 and the fifth inclined sipe 82 is not the end of the fifth inclined sipe 82.

[0059] The fourth inclined sipe 81, the fifth inclined sipe 82, and the sixth inclined sipe 83 are arranged in parallel. The length from the connection position of the fifth inclined sipe 82 and the edge pattern groove 6 to the connection position of the fifth inclined sipe 82 and the seventh inclined sipe 84 is greater than the length of the fourth inclined sipe 81 and also greater than the length of the sixth inclined sipe 83.

[0060] The length of the fourth inclined sipe 81 is the same as the length of the sixth inclined sipe 83. The fifth inclined sipe 82 is connected to the position of 1 / 2-3 / 5 of the width of the third pattern bar 3.

[0061] The cross-sectional shape of the second sipe is similar to a fork shape.

[0062] The design of the shoulder sipe has a great influence on the noise, wet grip performance, and guiding performance of the tire. It is crucial to meet the performance target of customer demand through the design of the shoulder pattern.

[0063] The second pattern groove is composed of a fourth diagonal groove 81, a fifth diagonal groove 82, a sixth diagonal groove 83, a seventh diagonal groove 84, and an eighth diagonal groove 85, wherein the fourth diagonal groove 81, the fifth diagonal groove 82, and the sixth diagonal groove 83 are designed in parallel and have an included angle with the horizontal axis in the range of 15°-20°, the seventh diagonal groove 84 has an included angle with the vertical direction in the range of 25°-30°, the eighth diagonal groove 85 has an included angle with the vertical direction in the range of 5°-10°, and the overall width of the groove is designed in the range of 0.6mm-1mm. The design advantages are as follows: 1. Beneficial to noise: (1) The shoulder of the tread pattern is designed as a closed shoulder design, which effectively avoids the noise generated by the horn effect when the tire contacts the road (2) The overall design of the pattern groove has an included angle with the horizontal axis in the range of 15°-20°, the fourth diagonal groove 81, the fifth diagonal groove 82, and the sixth diagonal groove 83 of the second groove in the shoulder are designed to have the same angle as the groove of the middle pattern rib, which reduces the generation of pumping noise; (3) The fourth diagonal groove 81 and the seventh diagonal groove 84 are connected, and the sixth diagonal groove 83 and the eighth diagonal groove 85 are connected, which reduces the generation of the tire pattern sound amplification phenomenon. In addition, our simulation verification shows that the design of the angle of the shoulder pattern groove and the horizontal axis in the range of 15°-20° has little effect on the noise level. 2. Beneficial to wet grip performance and tire guiding performance.

[0064] The included angle between the fourth diagonal groove, the fifth diagonal groove, the sixth diagonal groove, and the tire tread pattern transverse direction is 15-20°, and the fourth diagonal groove, the fifth diagonal groove, the sixth diagonal groove, the seventh diagonal groove, and the eighth diagonal groove are respectively straight grooves, the groove bottom is designed as a full round corner, and the groove depth is in the range of 1.5-2.5mm.

[0065] The design and orderly arrangement of the first groove pattern and the second groove pattern are beneficial to the wet grip performance and noise level of the tire. In addition, the first groove pattern and the second groove pattern are formed by cutting the pattern strip into multiple pieces using a steel sheet, which increases the saturation of the tread pattern and makes the pattern reach the purpose of broken pattern strip but not losing rigidity.

[0066] The edge pattern groove 6 includes a sub-groove 64, a second support pattern strip 63, a first support pattern strip 62, and a pattern main groove 61. From the second pattern strip 2 to the adjacent third pattern strip 3 direction, they are in turn the sub-groove 64, the second support pattern strip 63, the first support pattern strip 62, and the pattern main groove 61. Figure 4 As shown in the figure, the angle between the groove wall of the pattern main groove 61 and the position of the upper end of the groove wall in the tread normal direction is 8°-11°, and on the transverse cross section, from the first support pattern strip 62 to the second support pattern strip 63, it is connected through the outwardly inclined line II 66 of the second support pattern strip 63, and the angle between the line II 66 and the position of the upper end of the line II 66 in the tread normal direction is 8°-11°.

[0067] The edge groove design prevents cracking at the bottom of the groove while increasing its stone removal capacity. In addition, the design of the second support strip can effectively improve the anti-wear ability of the groove, thereby increasing the mileage of the groove.

[0068] In the cross-sectional view of the edge tread groove, the bottom of the secondary groove 64 has a "teardrop" design. The groove wall of the secondary groove 64 is a vertical structure from the bottom to the tire tread. This design can prevent stress concentration, which could lead to steel sheet breakage. Figure 4 In the middle, the secondary ditch 64 is designed with a full circular arc (represented by C4), and the ditch wall is designed with a vertical line. The bottom and the wall of the secondary ditch 64 are connected by a circular arc (represented by C5 in the figure).

[0069] In the transverse cross-sectional view of the edge patterned groove, to avoid cracking of the main patterned groove, the bottom of the main patterned groove 6 is designed with rounded corners. Figure 4 (Represented by C1 in the diagram) The sidewall where the bottom rounded corner / arc of the main pattern groove 6 connects to the first supporting pattern strip 62 forms an outwardly sloping line I65 from bottom to top. From the first supporting pattern strip 62 to the second supporting pattern strip 63, it is connected by an outwardly sloping line II66 in the direction of the second supporting pattern strip 63. Moreover, in the transverse cross-sectional view, the main pattern groove 61 and the upper surface of the first supporting pattern strip 62 are connected by a rounded corner (represented by C2), and the first supporting pattern strip 62 and the sloping line II66 are connected by a rounded corner (represented by C3).

[0070] The main groove 61 has a depth L1 of 14-16mm; the first supporting groove 62 has a width of 2-3mm and a depth L2 of 10-13mm; the second supporting groove 63 has a width W3 of 6-8mm and a depth L3 of 2-4mm; the secondary groove 64 has a depth L2 of 10-13mm and a width W2 of 0.8-1.2mm; and the edge groove 6 has a width W1 of 15.5-17.5mm.

[0071] Along the tire circumference, the upper surface of the second support tread strip 63 is provided with elongated elliptical blocks. Adjacent elongated elliptical blocks are connected by reinforcing ribs. The design of connecting the elongated elliptical blocks with reinforcing ribs is for heat dissipation. The length of the elongated elliptical blocks is 1 / 2 to 3 / 4 of the pitch length.

[0072] The central pattern groove 4 and the edge pattern groove 6 are straight-line pattern grooves.

[0073] Along the circumferential direction of the tire, the bottom of the central tread groove 4 is wavy on the left and right; in the transverse section, the groove wall of the central tread groove 4 gradually slopes outward from bottom to top.

[0074] The central tread grooves are zigzag grooves, which improve tire traction and handling stability simultaneously; for example... Figure 5As shown in the lateral section view of the middle groove 5, the bottom is designed as "water drop type", which increases the heat dissipation of the tread while ensuring the pattern saturation; the middle groove bottom is arc-shaped, and the maximum width range is 3.5-4.3mm. From the top of the arc-shaped bottom to the tire tread, there are vertical line 51 and outwardly inclined line III 52 in sequence, which makes the steel sheet more firmly connected during molding in the mold, and the width between the vertical groove wall and the inclined groove wall is 0.5-2.2mm.

[0075] The width ratio of the first pattern strip and the second pattern strip is 0.9-1.1. The width of the third pattern strip 3 is 1.8-2 times that of the first pattern strip and the second pattern strip.

[0076] The tread pattern is formed by rotating the left pattern of the center axis by 180° to form the right pattern.

[0077] The overall shoulder adopts a closed shoulder design to reduce noise. The shoulder position profile adopts an arc design, which is referred to as arc B. As shown in the lateral section view, Figure 3 As shown in the lateral section view, the upper surface contour of the shoulder position (i.e., the shoulder part of the tread) is arc B, Figure 3 The upper surface contour of the crown position is arc A, and arc B is tangent to arc A. In the prior art, the shoulder position is usually designed as a straight line, tangent to or intersecting with arc A, so that the design of the present application improves the anti-skewing wear resistance of the tire, and the upper surface contour of the shoulder position (i.e., the shoulder tread) adopts an arc design, which reduces the stress at the corners of the pattern blocks and increases the service life of the tire. Figure 3

[0078] As shown in the lateral section view, the upper surface contour of the shoulder position (i.e., the shoulder part of the tread) is arc B, Figure 3 As shown in the lateral section view, the upper surface contour of the shoulder position (i.e., the shoulder part of the tread) is arc B,

[0079] The tread pattern saturation is close to 85%, and the first knife groove pattern is provided on the pattern ribs 1 and 2, which improves the overall rigidity of the pattern strip and ensures the product mileage.

[0080] ​The present application mainly improves the tire noise level through the sipe on the pattern bar, the tread pattern in the present application adopts equal pitch design or three variable pitch design, which can greatly reduce noise; through the design of the pattern groove and the shoulder contour, the tire anti-deviation wear capacity is improved; through the design of the straight pattern groove combined with the zigzag pattern groove, the tire traction is improved while ensuring the tire control stability; especially the combination design of the sipe on the pattern bar and the pattern groove enhances the wet ground grip performance of the tread pattern, improves the noise level of the tire, and improves the overall control stability of the tire. In addition, as shown in Figure 7 the present application, the tread pattern adopts equal pitch design or three variable pitch design, which can greatly reduce noise. Especially, the present application adopts equal pitch design for the pattern pitch, and the pitch number ranges from 94 to 100, so that the noise level reaches A level.

[0081] In order to make the tire can be used on the national road surface in the long distance, and need to have lower noise level and higher mileage life, the present application provides a low noise tread pattern for improving the long distance transportation mileage, which has high mileage life. The design of the tread pattern can avoid high heat generation of the shoulder and the crown during the long distance transportation process, and reduce the early damage. The design of the tread pattern considers the noise and wet performance of the pattern, so that the pattern noise level reaches A level, and the wet level reaches B level. The optimized pattern groove design combined with the design of the crown contour can improve the anti-deviation wear performance of the tire, and improve the control stability of the tire.

[0082] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, it should be pointed out that for the person skilled in the art and any person skilled in the art, under the premise of not departing from the overall concept of the present application, according to the technical scheme and the inventive concept of the present application, equivalent replacement or change is made, and several changes and improvements are made, which should also be regarded as the protection scope of the present application.

Claims

1. A sipe pattern on a low-noise tire tread that improves medium- and long-distance transport mileage, characterized in that: The tread pattern includes tread grooves and tread strips arranged along the circumference of the tire. The sipes are located on the tread strips with tread grooves on both sides. In the width direction, the center of the tread pattern is the center tread groove (4), and from the center tread groove (4) to both sides are the first tread strip (1), the middle tread groove (5), the second tread strip (2), the edge tread groove (6), and the third tread strip (3). The sipe pattern is the first sipe pattern (7), which is located on the first tread strip (1) or the second tread strip (2). The first sipe pattern (7) includes a first oblique sipe (71), a second oblique sipe (72), and a third oblique sipe (73). The first oblique sipe (71) is connected to the tread grooves on both sides of the tread strip at both ends. The second oblique sipe (72) is connected to the first oblique sipe (71) at one end and to the third oblique sipe (73) at the other end. The third oblique sipe (73) is connected to the second oblique sipe (72) at one end and to the tread groove on one side of the tread strip at the other end. The angle between the first oblique sipe (71) and the third oblique sipe (73) and the lateral side of the tire tread pattern is 15-20°. The central pattern groove (5) is a zigzag pattern groove; one end of the first oblique groove (71) is connected to the central pattern groove (4) or the edge pattern groove (6), and the other end is connected to the bend of the central pattern 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 central pattern groove (5); and the first oblique groove (71) and the third oblique groove (73) are connected at two different bends of the central pattern groove.

2. A low-noise tire tread pattern for improving medium- and long-distance transportation mileage, characterized in that: It includes tread grooves and tread strips arranged along the circumference of the tire; in the width direction, the center of the tread pattern is a central tread groove (4), and from the central tread groove (4) to both sides are respectively provided a first tread strip (1), a middle tread groove (5), a second tread strip (2), a side tread groove (6) and a third tread strip (3), and a first sipe pattern (7) is provided on the first tread strip (1) and the second tread strip (2); 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 tread groove (4) or the edge tread groove (6), and the other end is connected to the center tread 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 center tread groove (5). The angle between the first oblique sipe (71) and the third oblique sipe (73) and the lateral side of the tire tread pattern is 15-20°. The central pattern groove (5) is a zigzag pattern groove; one end of the first oblique groove (71) is connected to the central pattern groove (4) or the edge pattern groove (6), and the other end is connected to the bend of the central pattern 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 central pattern groove (5); and the first oblique groove (71) and the third oblique groove (73) are connected at two different bends of the central pattern groove.

3. The low-noise tread pattern for improving medium- and long-distance transportation mileage according to claim 2, characterized in that: The third pattern strip (3) is provided with a second groove pattern (8); the second groove pattern (8) includes a fourth oblique groove (81), a fifth oblique groove (82), a sixth oblique groove (83), a seventh oblique groove (84) and an eighth oblique groove (85). The fourth oblique groove (81), the fifth oblique groove (82) and the sixth oblique groove (83) are respectively connected to the edge pattern groove (6). One end of the seventh oblique groove (84) is connected to the end of the fourth oblique groove (81) away from the edge pattern groove (6), and the other end is connected to the fifth oblique groove (82). One end of the eighth oblique groove (85) is connected to the end of the sixth oblique groove (83) away from the edge pattern groove (6), and the other end is connected to the fifth oblique groove (82). The seventh oblique groove (84) and the eighth oblique groove (85) are connected to each other, and the connection point is the connection point with the fifth oblique groove (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 edge tread groove (6) includes a secondary groove (64), a second supporting tread strip (63), a first supporting tread strip (62), and a main tread groove (61). From the second tread strip (2) to the adjacent third tread strip (3), the grooves are, in sequence, the secondary groove (64), the second supporting tread strip (63), the first supporting tread strip (62), and the main tread groove (61). The angle between the groove wall of the main tread groove (61) and the normal direction of the tread at the position of the upper end of the groove wall is 8°-11°. In the transverse section, from the first supporting tread strip (62) to the second supporting tread strip (63), the groove extends outward through the second supporting tread strip (64). 3) The oblique lines II (66) are connected in an inclined direction. The angle between the oblique line II (66) and the normal direction of the tread at the position of the upper end of the oblique line II is 8°-11°. The depth L1 of the main groove (61) is 14-16mm. The width of the first support tread strip (62) is 2-3mm and the depth L2 is 10-13mm. The width W3 of the second support tread strip (63) is 6-8mm and the depth L3 is 2-4mm. The depth L2 of the secondary groove (64) is 10-13mm and the width W2 is 0.8-1.2mm. The width W1 of the edge groove (6) is 15.5-17.5mm. Along the circumferential direction of the tire, the bottom of the central tread groove (4) is wavy; in the transverse section, the groove wall of the central tread groove (4) gradually slopes outward from bottom to top; The central tread groove is a zigzag tread groove. In the transverse cross-section of the central tread groove (5), the bottom is a "water droplet" design. The bottom of the central tread groove is arc-shaped, and the maximum width ranges from 3.5 to 4.3 mm. The groove wall of the central tread groove (5) consists of a vertical straight line and an outwardly inclined diagonal line Ⅲ from the top of the arc-shaped bottom to the tire surface. The width between the vertical groove wall and between the inclined groove wall ranges from 0.5 to 2.2 mm.

5. The low-noise tread pattern for improving medium- and long-distance transportation mileage according to claim 4, characterized in that: The two bends of the middle pattern grooves connected by the first oblique groove (71) and the third oblique groove (73) of the same first groove pattern are separated by at least one bend of the middle pattern groove. The first tread strip (1) and the second tread strip (2) are respectively provided with first sipes at intervals along the tire circumference; On the first pattern strip (1), there is at least one bend in the middle pattern groove (5) between two adjacent first groove patterns (7); on the second pattern strip (2), there is at least one bend in the middle pattern groove (5) between two adjacent first groove patterns (7). The width ratio of the first pattern strip (1) to 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 and second pattern strips; The bottom of the secondary ditch (64) is designed in a "water droplet" shape; In the transverse cross-sectional view of the edge pattern groove, the bottom of the main pattern groove (61) is designed with full rounded corners. The side wall of the first supporting pattern strip (62) forms an outward inclined line I (65) from bottom to top. From the first supporting pattern strip (62) to the second supporting pattern strip (63), it is connected by an outward inclined line II (66) in the direction of the second supporting pattern strip (63). Moreover, in the transverse cross-sectional view, the inclined line I (65) is connected to the upper surface of the first supporting pattern strip (62) by rounded corners, and the upper surface of the first supporting pattern strip (62) is connected to the inclined line II (66) by rounded corners. The central pattern groove (4) and the edge pattern groove (6) are straight pattern grooves; The tire shoulder features a closed shoulder design; the shoulder area has an arc-shaped outline.

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

7. The low-noise tread pattern for improving medium- and long-distance transportation mileage according to claim 3, characterized in that: Along the tire circumference, to the right of the center tread groove, the first slanted slant on the first tread strip is above the third slanted slant, and the first slanted slant on the adjacent second tread strip is below the third slanted slant. The first oblique groove (71) and the third oblique groove (73) are arranged in parallel. The length from the connection between the first oblique groove (71) and the middle pattern groove to the connection between the second oblique groove (72) and the first oblique groove (71) is greater than the length of the third oblique groove (73). The fourth oblique cutter groove (81), the fifth oblique cutter groove (82) and the sixth oblique cutter groove (83) are arranged in parallel. The length from the connection between the fifth oblique cutter groove (82) and the edge pattern groove (6) to the connection between the fifth oblique cutter groove (82) and the seventh oblique cutter groove (84) is greater than the length of the fourth oblique cutter groove (81) and also greater than the length of the sixth oblique cutter groove (83).

8. The low-noise tread pattern for improving medium- and long-distance transportation mileage according to claim 3, characterized in that: The first oblique groove (71), the second oblique groove (72) and the third oblique groove (73) are straight grooves with a full rounded corner design at the bottom and a width range of 0.6-1mm; the depth range of the first oblique groove and the second oblique groove is 2-4mm, and the depth range of the third oblique groove is 10-14mm. The fourth oblique groove (81) has the same length as the sixth oblique groove (83); The angle between the fourth, fifth, and sixth slanted slant grooves and the lateral side of the tire tread pattern is 15-20°. The fourth, fifth, sixth, seventh, and eighth slanted slant grooves are straight grooves with a fully rounded bottom. The groove depth ranges from 1.5 to 2.5 mm.

9. A low-noise tire for improving medium- and long-distance transportation mileage, characterized in that: The tire tread pattern is the tread pattern described in any one of claims 2-8.

Images