Tread pattern for truck tire for long distance transportation

Abstract

The utility model relates to the technical field of truck tire, and relates to a truck tire tread pattern for all-wheel position long-distance transportation, a truck tire tread pattern for all-wheel position long-distance transportation, the tread pattern includes shoulder pattern and crown pattern, the crown pattern includes middle pattern rib and the edge part pattern rib at both sides of middle pattern rib, and periodic triangular wave pattern groove is arranged between middle pattern rib and edge part pattern rib, the middle pattern rib is formed by the uniform arrangement of middle pattern blocks along the tire circumferential direction, and steel sheet groove a formed by 3D steel sheet is arranged between the middle pattern blocks, the edge part pattern rib is formed by the uniform arrangement of edge part pattern blocks along the tire circumferential direction, and steel sheet groove b formed by 3D steel sheet is arranged between the edge part pattern blocks. The pattern saturation is 84%, provides sufficient wear rubber amount, guarantees long-distance performance, the actual measured mileage is improved by about 10%, the anti-deviation wear level is improved by about 15%, the rolling resistance is significantly reduced, and the overall fuel economy is improved.

Description

Technical Field

[0001] This utility model relates to the field of truck and bus tire technology, and specifically to a tread pattern for a truck and bus tire used for medium and long-distance transportation in all wheel positions. Background Technology

[0002] With the continuous improvement of the highway transportation environment, long-haul vehicles generally adopt air suspension and hydraulic retarding systems, resulting in increased vehicle power and speed. This has significantly increased user demands for tires with high mileage, resistance to uneven wear, and low rolling resistance. Existing all-wheel tires mostly employ a straight tread pattern design to reduce rolling resistance, but this often leads to problems such as uneven wear on both shoulders and deformed tread patterns on air-suspended vehicles, limiting tire life. Therefore, there is an urgent need for a new tread pattern structure that balances low rolling resistance, high mileage, and resistance to uneven wear to meet the needs of new vehicle models and transportation conditions. Utility Model Content

[0003] In view of the fact that existing technologies cannot simultaneously achieve low rolling resistance, high mileage and anti-uniform wear in tire tread patterns, this utility model provides a tread pattern for truck and bus tires used in medium and long-distance transportation with all wheel positions.

[0004] To solve the above problems, the specific technical solution of this utility model is as follows: A tread pattern for a truck and bus tire used in medium- and long-distance transportation, comprising a shoulder pattern and a crown pattern, with straight grooves between the shoulder pattern and the crown pattern; the crown pattern includes a central rib and side ribs on both sides of the central rib, with periodic triangular wave grooves between the central and side ribs; the central rib is formed by central tread blocks evenly arranged along the tire circumference, with grooves a formed by 3D steel sheets between the central tread blocks; the side ribs are formed by side tread blocks evenly arranged along the tire circumference, with grooves b formed by 3D steel sheets between the side tread blocks; both ends of groove a are connected to the inner protrusions corresponding to the periodic triangular wave grooves on both sides, one end of groove b is connected to the outer protrusion corresponding to the periodic triangular wave groove, and the other end is connected to the straight groove; the groove a... Both the steel plate groove b and the tread groove b are Z-shaped. The Z-shaped steel plate groove b extends towards both sides of the tire tread, starting from the outer convex point. Taking the starting point of the Z-shaped steel plate groove b on the right side of the tread rib as the starting point, it extends horizontally to the right along the tire's horizontal direction to form a horizontally directed line segment L. With the horizontally directed line segment L as the starting side, the angle between the starting edge of the Z-shaped steel plate groove b on the left side of the tread rib and the horizontally directed line segment L is -145° to -165°, and the angle between the starting edge of the Z-shaped steel plate groove b on the right side of the tread rib and the horizontally directed line segment L is 15°. The angle between the starting edge of the Z-shaped steel plate groove a of the middle tread rib and the horizontal directed line segment L is 145°~165°; the starting edge and ending edge of the Z-shaped steel plate groove a are parallel and equal, the starting edge and ending edge of the Z-shaped steel plate groove b are parallel and equal, the Z-shaped steel plate groove b of the left side tread rib is parallel to the Z-shaped steel plate groove b of the right side tread rib; the angle θ1 between the middle edge and the starting edge of the Z-shaped steel plate groove a is 142°~162°; the angle θ2 between the middle edge and the starting edge of the Z-shaped steel plate groove b is 122°~142°; the shoulder tread pattern has a circumferential integral structure; the tread pattern adopts an equal pitch design.

[0005] The angle between the two hypotenuses corresponding to the inner and outer convex points of the periodic triangular waveform groove is 120°~140°.

[0006] The steel plate groove a is designed with a constant depth of 13-15mm; the steel plate groove b is designed with a variable depth, with the area corresponding to the starting edge having a depth of 13-15mm and the area corresponding to the ending edge having a depth of 9-11mm. The area corresponding to the starting edge and the area corresponding to the ending edge are connected by two arc transitions.

[0007] The spacing between the side walls of the steel plate grooves a and b is a variable width design. The steel plate grooves a and b form an upper groove area and a lower groove area at a depth of 0.8 mm. The width of the upper groove area gradually narrows from the opening to the dividing line, with a width of 1.6-2 mm at the opening and 1-1.4 mm at the dividing line. The width of the lower groove area is constant from the dividing line to the bottom, with a width of 1-1.4 mm. The bottom of the steel plate grooves a and b is designed with an arc.

[0008] The straight tread grooves are evenly spaced along the circumference of the tire, with a distance of 5cm between adjacent stone platforms. The stone platforms include two different types: long stone platforms and short stone platforms. Three long stone platforms and two short stone platforms are arranged in a repeating sequence.

[0009] The length of the long stone platform is 27.5-31.5mm, and the length of the short stone platform is 10.25-14.25mm.

[0010] The width ratio of the middle tread rib to the edge tread rib, the shoulder tread, and the periodic triangular wave tread groove is 35:40:46:8.

[0011] The periodic triangular wave patterned groove has a depth of 16.5-20.5mm and a width of 8.5-12.5mm, with an arc-shaped bottom. The straight patterned groove has a depth of 16.5-20.5mm, and the spacing between the sidewalls of the straight patterned groove is a variable width design. The straight patterned groove forms an upper groove area and a lower groove area at a depth of 0.8mm. The upper groove area gradually narrows from the opening to the dividing line, with a width of 2.8-3.4mm at the opening and 1.8-2.2mm at the dividing line. The lower groove area has a constant width of 1.8-2.2mm from the dividing line to the bottom, with an arc-shaped bottom.

[0012] The tread pattern has a pitch number of 45-55 and a pitch of 60-75 mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The design of the periodic triangular wave pattern grooves corresponding to the tread ribs of the tread pattern makes the ground pressure distribution more uniform and significantly reduces the uneven wear of the tire shoulder; (2) The Z-shaped steel plate groove structure formed by 3D steel plates effectively inhibits the creep of the pattern, making the tire more stable in straight driving and stronger in grip; (3) The bottom of the pattern groove adopts an arc design, and the bottom of the straight pattern groove is equipped with a stone-removing platform, which can effectively reduce the cracks at the bottom of the groove and improve the structural durability; (4) The pattern saturation is 84%, providing sufficient wear rubber and ensuring long-mileage performance; the measured mileage reached 420,000 kilometers, which is about 10% higher, and the anti-uneven wear level was no uneven wear in the first 120,000 kilometers, which is about 15% higher, the rolling resistance was significantly reduced, and the overall fuel economy was improved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the planar unfolded structure of the tread pattern of this utility model.

[0015] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0016] Figure 3 This is a cross-sectional schematic diagram of a periodic triangular wave patterned groove.

[0017] Figure 4 This is a cross-sectional schematic diagram of a straight-line patterned groove.

[0018] Figure 5 This is a top view of the steel plate groove a.

[0019] Figure 6 This is a top view of the steel plate groove b.

[0020] Figure 7 This is a schematic cross-sectional view of the steel plate groove a extending in the direction of extension.

[0021] Figure 8 This is a schematic cross-sectional view of the steel plate groove b extending in the direction of extension.

[0022] Figure 9 for Figure 1 A schematic diagram of the cross section from e to e'.

[0023] Figure 10 for Figure 1 A schematic diagram of the cross section between c-c'.

[0024] Figure 11 This is a top view of a straight-line patterned groove.

[0025] Among them, 1 is the edge pattern rib; 11 is the edge pattern block; 2 is the middle pattern rib; 21 is the middle pattern block; 3 is the tire shoulder pattern; 4 is the periodic triangular wave pattern groove; 5 is the straight pattern groove; 6 is the steel plate groove a; 7 is the steel plate groove b; 8 is the stone platform; 81 is the long stone platform; 82 is the short stone platform; 9 is the pattern pitch. Detailed Implementation

[0026] To more clearly illustrate the technical solution of this utility model, the present utility model has been further described above in conjunction with specific embodiments. It should be understood that the following embodiments are only used to illustrate this utility model and are not intended to limit the scope of protection of this utility model.

[0027] like Figure 1-2As shown, a tire tread pattern for a truck and bus used in medium and long-distance transportation is disclosed. The tread pattern includes a shoulder pattern 3 and a crown pattern, with straight grooves 5 between the shoulder pattern 3 and the crown pattern. The crown pattern includes a central rib 2 and side ribs 1 located on both sides of the central rib 2, with periodic triangular wave grooves 4 between the central rib 2 and the side ribs 1. The central rib 2 is formed by central rib blocks 21 evenly arranged along the tire circumference, with steel plate grooves a 6 formed by 3D steel sheets between the central rib blocks 21. The side ribs 1 are formed by side rib blocks 11 evenly arranged along the tire circumference, with steel plate grooves b 7 formed by 3D steel sheets between the side rib blocks 11. The tread blocks form lateral support, reducing tread creep.

[0028] The periodic triangular waveform groove is a contour formed by connecting two straight line segments with constant slopes end to end to form a triangular unit, and the geometric parameters (amplitude, period, slope, etc.) of adjacent triangular units are consistent, and the whole satisfies the periodic repetition law.

[0029] The shoulder pattern 3 has a circumferential integral structure, and the shoulder pattern 3 is combined with the straight tread groove 5 to improve the distribution of ground stress.

[0030] The tire tread pattern adopts an equal pitch design.

[0031] Both ends of the steel plate groove a6 are connected to the inner convex points corresponding to the periodic triangular waveform grooves 4 on both sides, one end of the steel plate groove b7 is connected to the outer convex point corresponding to the periodic triangular waveform groove 4, and the other end of the steel plate groove b7 is connected to the straight patterned groove 5. The inner convex point and the outer convex point corresponding to the periodic triangular waveform groove 4 are the points where the end point of the steel plate groove is closest to the outer or inner convex point.

[0032] Both the steel plate groove a 6 and the steel plate groove b 7 are Z-shaped, and the Z-shaped steel plate groove a and the Z-shaped steel plate groove b are composed of a starting end edge, a middle edge and a ending end edge.

[0033] The Z-shaped steel groove b extends outwards from the outer convex point to both sides of the tire tread. Starting from the starting point of the Z-shaped steel groove b on the right side tread rib, it extends horizontally to the right along the tire's horizontal direction to form a horizontally directed line segment L. Taking the horizontally directed line segment L as its starting side, the angle rotated counterclockwise is a positive angle, and the angle rotated clockwise is a negative angle. The angle between the starting edge of the Z-shaped steel groove b on the left side tread rib and the horizontally directed line segment L is -145° to -165°. The angle between the starting edge of the Z-shaped steel groove b on the right side tread rib and the horizontally directed line segment L is 15° to 35°. The angle between the starting edge of the Z-shaped steel groove a on the middle tread rib 2 and the horizontally directed line segment L is 145°. 165°; the starting edge and ending edge of the Z-shaped steel plate groove a are parallel and equal, and the starting edge and ending edge of the Z-shaped steel plate groove b are parallel and equal; the Z-shaped steel plate groove b of the left side patterned rib and the Z-shaped steel plate groove b of the right side patterned rib are parallel to each other; the Z-shaped steel plate groove structure forms a three-dimensional trench wall, which improves drainage, heat dissipation and driving grip.

[0034] The angle θ1 between the middle side and the starting end side of the Z-shaped steel plate groove a is 142°~162°; the angle θ2 between the middle side and the starting end side of the Z-shaped steel plate groove b is 122°~142°.

[0035] The angle between the two hypotenuses corresponding to the inner and outer convex points of the periodic triangular waveform groove 4 is 120°~140°.

[0036] like Figure 5-8 As shown, the steel strip groove a 6 is designed with a constant depth, with a depth L3 of 13-15mm; the steel strip groove b 7 is designed with a variable depth, with the area corresponding to the starting edge having a depth L3 of 13-15mm and the area corresponding to the ending edge having a depth L2 of 9-11mm. The areas corresponding to the starting edge and the areas corresponding to the ending edge are connected by two arcs R3. The variable depth design of the steel strip groove b allows the inner ribs to be connected in the later stages of tire wear, providing sufficient wearable rubber material and significantly increasing mileage.

[0037] like Figure 9-10As shown, the spacing between the side walls of steel plate groove a6 and steel plate groove b7 is a variable width design. The steel plate groove a6 and steel plate groove b7 form an upper groove area and a lower groove area at a depth of 0.8mm. The width of the upper groove area gradually narrows from the opening to the dividing line, with a width of 1.6-2mm at the opening and 1-1.4mm at the dividing line. The width of the lower groove area is constant from the dividing line to the bottom, with a width of 1-1.4mm. The bottom R4 of the groove is designed with an arc. The bottom of steel plate groove a and steel plate groove b is designed with an arc. The width between the side walls of the steel plate groove is designed with a variable width, which effectively avoids the early uneven wear caused by the right angle endpoint contact between the surface of the patterned block and the side.

[0038] like Figure 6 As shown, the bottom of the straight tread groove 5 is evenly spaced along the circumference of the tire with stone platforms 8, and the distance between adjacent stone platforms 8 is 5cm; the stone platforms 8 include two different types: long stone platforms 81 and short stone platforms 82, and 3 long stone platforms 81 and 2 short stone platforms 82 are arranged in a repeating sequence.

[0039] The length of the long stone platform 81 is 27.5-31.5mm, and the length of the short stone platform 82 is 10.25-14.25mm.

[0040] The width ratio of the middle pattern rib 2 to the edge pattern rib 1, the shoulder pattern 3, and the periodic triangular wave pattern groove 4 is 35:40:46:8.

[0041] like Figure 3 As shown, the periodic triangular wave pattern groove 4 has a depth L1 of 16.5-20.5 mm, a width W1 of 8.5-12.5 mm, and an arc-shaped bottom R3; as Figure 4 As shown, the straight patterned groove 5 has a depth of 16.5-20.5mm. The spacing between the two sidewalls of the straight patterned groove 5 is a variable width design. The straight patterned groove 5 forms an upper groove area and a lower groove area at a depth of 0.8mm. The width of the upper groove area gradually narrows from the opening to the dividing line. The width W2 at the opening is 2.8-3.4mm, and the width W1 at the dividing line is 1.8-2.2mm. The width of the lower groove area is constant from the dividing line to the bottom. The width W3 is 1.8-2.2mm. The bottom R1 of the groove is designed with an arc.

[0042] The tread pattern has a pitch number of 45-55 and a pitch of 60-75mm, which can effectively suppress resonance noise.

[0043] The tread pattern structure is suitable for 12R22.5 specification all-steel radial truck and bus tires.

[0044] With a tread saturation of 84%, it provides ample wear-resistant rubber, ensuring long-mileage performance; the actual measured mileage reached 420,000 kilometers, an improvement of about 10%; the anti-uneven wear level was not uneven in the first 120,000 kilometers, an improvement of about 15%; rolling resistance was significantly reduced, and overall fuel economy was improved.

[0045] In summary, this utility model has a reasonable structural design, good mechanical support performance, heat dissipation performance and durability performance, and is suitable for transportation on straight, high-speed and high-quality roads, especially for vehicles equipped with air suspension and hydraulic retarder systems.

[0046] The above description is only a preferred embodiment of this utility model. It should be noted that, for those skilled in the art of mining tires, several detailed changes and improvements can be made without departing from the overall concept of this utility model. These changes are not limited to the transition forms of the tread block ratio, angle, and distance, and should also be considered within the scope of protection of this utility model.

Claims

1. A tread pattern for a truck / bus tire used in medium- and long-distance transportation with all wheel positions, characterized in that, The tread pattern includes a shoulder pattern (3) and a crown pattern, with straight grooves (5) provided between the shoulder pattern (3) and the crown pattern. The tread pattern includes a central tread rib (2) and side tread ribs (1) located on both sides of the central tread rib (2). Periodic triangular wave pattern grooves (4) are provided between the central tread rib (2) and the side tread ribs (1). The central tread rib (2) is formed by central tread blocks (21) evenly arranged along the tire circumference. Steel plate grooves a (6) formed by 3D steel plates are provided between the central tread blocks (21). The side tread ribs (1) are formed by side tread blocks (11) evenly arranged along the tire circumference. Steel plate grooves b (7) formed by 3D steel plates are provided between the side tread blocks (11). The two ends of the steel plate groove a (6) are respectively connected to the inner protrusions corresponding to the periodic triangular waveform grooves (4) on both sides. One end of the steel plate groove b (7) is connected to the outer protrusions corresponding to the periodic triangular waveform grooves (4), and the other end is connected to the straight pattern groove (5). Both the steel plate groove a (6) and the steel plate groove b (7) are Z-shaped. The Z-shaped steel strip groove b extends to both sides of the tire tread starting from the outer convex point. Taking the starting end of the Z-shaped steel strip groove b of the right side tread rib as the starting point, it extends to the right along the horizontal direction of the tire to obtain a horizontal directional line segment L. Taking the horizontal directional line segment L as the starting side, the angle between the starting end of the Z-shaped steel strip groove b of the left side tread rib and the horizontal directional line segment L is -145°~-165°, the angle between the starting end of the Z-shaped steel strip groove b of the right side tread rib and the horizontal directional line segment L is 15°~35°, and the angle between the starting end of the Z-shaped steel strip groove a of the middle tread rib (2) and the horizontal directional line segment L is 145°~165°. The starting and ending edges of the Z-shaped steel groove a are parallel and equal, the starting and ending edges of the Z-shaped steel groove b are parallel and equal, and the Z-shaped steel groove b of the left side patterned rib is parallel to the Z-shaped steel groove b of the right side patterned rib. The angle θ1 between the middle side and the starting end side of the Z-shaped steel plate groove a is 142°~162°; The angle θ2 between the middle side and the starting end side of the Z-shaped steel plate groove b is 122°~142°; The shoulder pattern (3) has a circumferential structure; The tire tread pattern adopts an equal pitch design.

2. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 1, characterized in that, The angle between the two hypotenuses corresponding to the inner and outer convex points of the periodic triangular waveform groove (4) is 120°~140°.

3. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 2, characterized in that, The steel plate groove a (6) is designed with a constant depth of 13-15mm; the steel plate groove b (7) is designed with a variable depth, with the depth of the area corresponding to the starting edge being 13-15mm and the depth of the area corresponding to the ending edge being 9-11mm. The area corresponding to the starting edge and the area corresponding to the ending edge are connected by two arc transitions.

4. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 3, characterized in that, The spacing between the two side walls of the steel plate groove a (6) and the steel plate groove b (7) is a variable width design. The steel plate groove a (6) and the steel plate groove b (7) form an upper groove area and a lower groove area at a depth of 0.8 mm. The upper groove area gradually narrows from the opening to the dividing line. The width at the opening is 1.6-2 mm, and the width at the dividing line is 1-1.4 mm. The lower groove area has a constant width from the dividing line to the bottom, with a width of 1-1.4 mm. The bottom of the steel plate groove a (6) and the steel plate groove b (7) is designed with an arc.

5. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 4, characterized in that, The straight groove (5) has stone platforms (8) evenly spaced along the tire circumference at the bottom of the groove, with a distance of 5cm between adjacent stone platforms (8); the stone platforms include two different types: long stone platforms and short stone platforms, with 3 long stone platforms (81) and 2 short stone platforms (82) arranged in a repeating sequence.

6. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 5, characterized in that, The length of the long stone platform (81) is 27.5-31.5 mm, and the length of the short stone platform (82) is 10.25-14.25 mm.

7. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 4, characterized in that, The width ratio of the middle pattern rib (2) to the edge pattern rib (1), the shoulder pattern (3), and the periodic triangular wave pattern groove (4) is 35:40:46:

8.

8. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 7, characterized in that, The periodic triangular wave patterned groove (4) has a depth of 16.5-20.5 mm and a width of 8.5-12.5 mm, with an arc-shaped bottom. The straight patterned groove (5) has a depth of 16.5-20.5 mm, and the spacing between the two sidewalls of the straight patterned groove (5) is a variable width design. The straight patterned groove (5) forms an upper groove area and a lower groove area at a depth of 0.8 mm. The upper groove area gradually narrows from the opening to the dividing line, with a width of 2.8-3.4 mm at the opening and 1.8-2.2 mm at the dividing line. The lower groove area has a constant width from the dividing line to the bottom, with a width of 1.8-2.2 mm, and an arc-shaped bottom.

9. The tread pattern of a truck / bus tire for medium- and long-distance transportation with all wheel positions as described in claim 8, characterized in that, The tread pattern has a pitch number of 45-55 and a pitch of 60-75 mm.

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