Off-the-road tire tread with three-dimensional sipe pattern structure

Abstract

The invention discloses an off-the-road tire tread with a three-dimensional sipe pattern structure, which comprises a central pattern block I and a central pattern block II which are alternately arranged in the circumferential direction, and shoulder pattern blocks are respectively arranged on two sides of the central pattern block I and the central pattern block II; the first central pattern block is separated from the two adjacent second central pattern blocks through a first transverse three-dimensional sipe groove and a second transverse three-dimensional sipe groove respectively, the first central pattern block and the second central pattern block are separated from the shoulder pattern blocks through longitudinal sipe grooves, and the adjacent shoulder pattern blocks are separated through main pattern grooves. The transverse three-dimensional sipe pattern grooves I, the transverse three-dimensional sipe pattern grooves II, the longitudinal sipe pattern grooves and the main pattern grooves are communicated with one another; and the groove walls of the transverse three-dimensional sipe grooves I and the transverse three-dimensional sipe grooves II are zigzag. The overall saturation degree of the tread pattern is 75-85%, the tread rigidity is high, and the tire has good puncture resistance and abrasion volume and is suitable for scenes with severe working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of tires, and in particular to an engineering machinery tire tread with a three-dimensional sipe pattern structure. Background Art

[0002] As an indispensable key component in mining operations, mining dump truck engineering machinery tires undertake the important task of transporting ores and materials. The challenges they face are far more severe than those of ordinary tires. Not only do they have to bear huge loads, but they also have to adapt to complex, changeable, and extremely harsh road environments. In specific working conditions such as metal mines, the durability and reliability of tires have become key indicators to measure their performance.

[0003] The road surface in the metal mine operation area is usually rugged and covered with large pieces of gravel. These stones are often hard and sharp, which can cause great damage to tires. When a mining dump truck is driving under full load, the tires are under tremendous pressure, which greatly increases the risk of punctures and cuts on the tire tread. At the same time, under such harsh conditions, the wear rate of the tires will also be significantly accelerated, which not only reduces the service life of the tires, but also increases maintenance costs. In serious cases, it may even affect the production efficiency and operation safety of the mine.

[0004] To address this series of problems, it is urgent to design a new tread pattern that can enhance the overall stiffness of the tread while maintaining good grip, so that the tire has good puncture resistance and higher wear volume, and can adapt to use in scenarios with harsh working conditions. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide an engineering machinery tire tread with a three-dimensional sipe pattern structure, the overall saturation of the tread pattern is 75-85%, the tread stiffness is significantly higher than that of conventional products, it has good puncture resistance and higher wear volume, and can adapt to use in scenes with harsh working conditions.

[0006] The technical solution of the present invention is:

[0007] The tread of an engineering machinery tire with a three-dimensional sipe pattern structure comprises a central pattern block 1 and a central pattern block 2 which are alternately arranged in the circumferential direction, and shoulder pattern blocks are respectively arranged on both sides of the central pattern block 1 and the central pattern block 2; the central pattern block 1 is separated from two adjacent central pattern blocks 2 by a transverse three-dimensional sipe pattern groove 1 and a transverse three-dimensional sipe pattern groove 2, respectively; the central pattern block 1 and the central pattern block 2 are separated from the shoulder pattern blocks by a longitudinal sipe pattern groove; adjacent shoulder pattern blocks are separated by a main pattern groove, and the transverse three-dimensional sipe pattern groove 1, the transverse three-dimensional sipe pattern groove 2, the longitudinal sipe groove and the main pattern groove are connected; the groove walls of the transverse three-dimensional sipe pattern groove 1 and the transverse three-dimensional sipe pattern groove 2 are serrated.

[0008] Preferably, the depth of the transverse three-dimensional sipe groove one is less than the depth of the transverse three-dimensional sipe groove two.

[0009] Preferably, the depth of the first transverse three-dimensional sipe groove and the second transverse three-dimensional sipe groove is 30-70% of the depth of the main groove.

[0010] Preferably, the first transverse three-dimensional sipe groove and the second transverse three-dimensional sipe groove are at an angle of 10-45° to the central centerline of the tread.

[0011] Preferably, the width of the transverse three-dimensional sipe groove one and the transverse three-dimensional sipe groove two is 3-5 mm.

[0012] Preferably, the longitudinal sipe groove is 10-20° with the central centerline of the tread.

[0013] Preferably, the depth of the longitudinal sipe groove is 30-70% of the depth of the main groove.

[0014] Preferably, the length of the main groove accounts for 20-40% of the width of the running surface, and the groove wall angle is 28-40°.

[0015] Preferably, the transverse three-dimensional sipe groove one and the transverse three-dimensional sipe groove two are S-shaped and the transverse three-dimensional sipe groove one and the transverse three-dimensional sipe groove two are arranged in parallel.

[0016] Preferably, the longitudinal sipe groove is in a zigzag shape.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The transverse three-dimensional sipe groove 1 and transverse three-dimensional sipe groove 2 of the present invention optimize the ground contact pressure distribution of the central pattern block 1 and the central pattern block 2, and can improve the tire traction performance and reduce the crown heat generation level; and during tire operation, the zigzag groove wall can be closed when the tire touches the ground, and the three-dimensional structure is mutually engaged to ensure the overall rigidity of the tire pattern block. The overall saturation of the tread pattern of the present invention is 75-85%, and its tread stiffness is significantly higher than that of conventional products, with good puncture resistance and higher wear volume, and can adapt to use in scenes with harsh working conditions.

[0019] 2. The longitudinal sipe grooves of the present invention achieve the optimal distribution of the forces of the central pattern block 1, the central pattern block 2 and the shoulder pattern block, and provide lateral gripping ability, reduce the heat generation of the crown, and improve the heat dissipation efficiency through air circulation. At the same time, the length of the main pattern groove and the groove wall angle design have a great influence on the pattern block area, traction performance, and performance; this embodiment selects the optimal main pattern groove length and groove wall angle, which can not only ensure the overall rigidity of the tread pattern, but also provide effective traction, avoid the entrainment of stones, and make the comprehensive performance of the tire reach the best. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an engineering machinery tire tread with a three-dimensional sipe pattern structure according to the present invention.

[0021] Figure 2 It is a side view of a transverse three-dimensional sipe groove 1 of the present invention.

[0022] Figure 3 is a side view of the main groove of the present invention.

[0023] In the figure, 1. Central pattern block one; 2. Central pattern block two; 3. Shoulder pattern block; 4. Horizontal three-dimensional sipe pattern groove one; 5. Horizontal three-dimensional sipe pattern groove two; 6. Longitudinal sipe pattern groove; 7. Main pattern groove. DETAILED DESCRIPTION

[0024] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0025] Example 1

[0026] like Figure 1 As shown, the present embodiment provides a tread of an engineering machinery tire with a three-dimensional sipe pattern structure, including a central pattern block 1 and a central pattern block 2 which are alternately arranged in the circumferential direction, and block-shaped shoulder pattern blocks 3 are respectively arranged on both sides of the central pattern block 1 and the central pattern block 2; the central pattern block 1 and the two adjacent central pattern blocks 2 are respectively separated by a transverse three-dimensional sipe pattern groove 1 4 and a transverse three-dimensional sipe pattern groove 2 5, wherein the transverse three-dimensional sipe pattern groove 1 4 and the transverse three-dimensional sipe pattern groove 2 5 are both S-shaped and arranged in parallel, so that the central pattern block 1 and the central pattern block 2 2 are in the shape of oblique long strips, which can make the pattern block pressure evenly distributed and provide additional longitudinal and lateral traction capabilities.

[0027] The central pattern block 1 and the central pattern block 2 are separated from the shoulder pattern block 3 by a zigzag longitudinal sipe groove 6, and the adjacent shoulder pattern blocks 3 are separated by a main pattern groove 7, and the transverse three-dimensional sipe groove 1 4, the transverse three-dimensional sipe groove 2 5, the longitudinal sipe groove 6 and the main pattern groove 7 are connected. Figure 1 , 3 As shown, the length of the main groove 7 accounts for 20-40% of the width of the running surface, the groove bottom adopts a full arc design, and the groove wall angle α is 28-40°. Selecting a suitable length of the main groove 7 can not only ensure the overall rigidity of the pattern block, improve the puncture resistance and wear resistance of the tread, but also provide the necessary traction performance; reasonable groove wall angle and groove bottom design are conducive to ensuring the self-cleaning performance of the pattern groove and preventing the inclusion of stones. The depth of the transverse three-dimensional sipe groove 1 4, the transverse three-dimensional sipe groove 2 5 and the longitudinal sipe groove 6 is 30-70% of the depth of the main groove 7. The depth of different sipe grooves depends on the functional design of the tire at different stages in the whole life cycle: in the early stage of use, they can provide certain traction performance and heat dissipation function; as the pattern wears out, the demand for heat dissipation function decreases in the middle and late stages of use, and the demand for puncture function increases. The depths of the transverse three-dimensional sipe groove 1 4, the transverse three-dimensional sipe groove 2 5 and the longitudinal sipe groove 6 can be designed in different combinations according to the functional requirements of different actual use scenarios to achieve different functional design purposes. In addition, the sawtooth groove wall dimensions (including width and length) of the transverse three-dimensional sipe groove 1 4 and the transverse three-dimensional sipe groove 2 5 can be designed in different values ​​according to different pattern depths. The width of the transverse three-dimensional sipe groove 1 4 and the transverse three-dimensional sipe groove 2 5 is 3-5mm, the transverse three-dimensional sipe groove 1 4 and the transverse three-dimensional sipe groove 2 5 are 10-45° to the central center line of the tread, and the longitudinal sipe groove 6 is 10-20° to the central center line of the tread, which can make the pressure distribution of the pattern block uniform and provide additional longitudinal and transverse traction capabilities; the appropriate sipe groove width design can prevent the entrainment of large stones and cause the tread life to decrease; when the sipe groove touches the ground, it can reach a closed state, and at the same time, with the special structure of the three-dimensional sipe, the overall stiffness of the pattern block is greatly improved through the bite characteristics between the pattern blocks, and the puncture resistance and wear performance of the tread are improved.

[0028] The longitudinal sipe groove 6 of this embodiment achieves the optimal distribution of the forces of the central pattern block 1, the central pattern block 2, and the shoulder pattern block 3, and provides lateral gripping ability, reduces the heat generation of the crown, and improves the heat dissipation efficiency through air circulation. At the same time, the length and groove wall angle design of the main pattern groove 7 have a great influence on the pattern block area, traction performance, and performance; this embodiment selects the optimal main pattern groove 7 length and groove wall angle, which can not only ensure the overall rigidity of the tread pattern, but also provide effective traction, avoid entrainment of stones, and achieve the best comprehensive performance of the tire.

[0029] In addition, if Figure 2 As shown, in this embodiment, the groove walls of the transverse three-dimensional sipe groove 1 4 and the transverse three-dimensional sipe groove 2 5 are serrated. The design of the transverse three-dimensional sipe groove 1 4 and the transverse three-dimensional sipe groove 2 5 in this embodiment can optimize the ground contact pressure distribution of the central pattern block 1 and the central pattern block 2 2, and can improve the tire traction performance and reduce the crown heat generation level; and during tire operation, the serrated groove wall can be closed when the tire touches the ground, and the three-dimensional structure is mutually engaged to ensure the overall rigidity of the tire pattern block.

[0030] The overall saturation of the tread pattern of this embodiment is 75-85%, and its tread stiffness is significantly higher than that of conventional products. It has good puncture resistance and higher wear volume, and can adapt to use in scenes with harsh working conditions.

Claims

1. An engineering machinery tire tread having a three-dimensional sipe structure, characterized in that: The invention comprises a central pattern block 1 (1) and a central pattern block 2 (2) which are alternately arranged in the circumferential direction, and shoulder pattern blocks (3) are respectively arranged on both sides of the central pattern block 1 (1) and the central pattern block 2 (2); the central pattern block 1 (1) and two adjacent central pattern blocks 2 (2) are respectively separated by a transverse three-dimensional sipe pattern groove 1 (4) and a transverse three-dimensional sipe pattern groove 2 (5); the central pattern block 1 (1) and the central pattern block 2 (2) are separated from the shoulder pattern block (3) by a longitudinal sipe pattern groove (6); adjacent shoulder pattern blocks (3) are separated by a main pattern groove (7); and the transverse three-dimensional sipe pattern groove 1 (4), the transverse three-dimensional sipe pattern groove 2 (5), the longitudinal sipe groove (6) and the main pattern groove (7) are connected; and the groove walls of the transverse three-dimensional sipe pattern groove 1 (4) and the transverse three-dimensional sipe pattern groove 2 (5) are sawtooth-shaped.

2. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The depth of the transverse three-dimensional sipe groove one (4) is less than the depth of the transverse three-dimensional sipe groove two (5).

3. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The depth of the transverse three-dimensional sipe groove 1 (4) and the transverse three-dimensional sipe groove 2 (5) is 30-70% of the depth of the main groove (7).

4. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The transverse three-dimensional sipe groove 1 (4) and the transverse three-dimensional sipe groove 2 (5) are 10-45 degrees to the central center line of the tread.

5. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The width of the transverse three-dimensional sipe groove one (4) and the transverse three-dimensional sipe groove two (5) is 3-5 mm.

6. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The longitudinal sipe groove (6) is 10-20 degrees away from the central centerline of the tread.

7. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The depth of the longitudinal sipe groove (6) is 30-70% of the depth of the main groove (7).

8. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The length of the main groove (7) accounts for 20-40% of the width of the running surface, and the groove wall angle is 28-40°.

9. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The transverse three-dimensional sipe groove one (4) and the transverse three-dimensional sipe groove two (5) are S-shaped and the transverse three-dimensional sipe groove one (4) and the transverse three-dimensional sipe groove two (5) are arranged in parallel.

10. The engineering machinery tire tread with a three-dimensional sipe structure according to claim 1, characterized in that: The longitudinal sipe groove (6) is in a broken line shape.

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