Engineering machinery tire pattern suitable for severe working conditions

Abstract

The utility model relates to the technical field of tire treads, in particular to an off-the-road tire pattern suitable for severe working conditions, which comprises a tread and a tire shoulder, pattern block groups are uniformly distributed along the circumferential direction of the tread, and pattern grooves are formed between adjacent pattern block groups. Each pattern block group sequentially comprises a first pattern block, a second pattern block and a third pattern block from one side of the tread to the other side of the tread, the first pattern block and the third pattern block are in central symmetry about the center of the pattern block group, and the second pattern block is in central symmetry about the center of the pattern block group; transverse connection reinforcing ribs are arranged between the second pattern blocks and the first pattern blocks and between the second pattern blocks and the third pattern blocks respectively, each transverse connection reinforcing rib is of a wedge-shaped structure which tends to be thickened from the two sides to the middle, transverse continuity is better, and edge pattern block falling and groove bottom cracking caused by longitudinal cutting force can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of tire treads, and specifically to a tire pattern for construction machinery suitable for harsh working conditions. Background Art

[0002] Under harsh working conditions, the tire tread is prone to block loss and groove bottom cracking. Under the condition of constant load, the force on the tread blocks increases accordingly due to the road surface, causing the tread blocks to wear too quickly, cut severely, and reduce their service life.

[0003] For mining tires, especially large vehicle mining tires, the main problem is that the longitudinal cutting of the tire is strong. In actual use, the tread blocks are more likely to crack vertically, and the tread blocks close to the shoulder are more likely to crack and separate from the tread blocks in the middle. Finite element analysis is conducted on this, and the analysis results are shown in Figure 5 It can be found that the stress at the edge between the middle pattern block and the pattern blocks on both sides is relatively large, which corresponds to the problems that occur in actual use, so it is necessary to enhance the continuity of the pattern blocks in the lateral direction. Utility Model Content

[0004] In order to solve the problem that mining tires are prone to longitudinal cracking in harsh environments, the utility model provides an engineering machinery tire pattern suitable for harsh working conditions.

[0005] The purpose of the utility model is achieved in the following way: a tire pattern for engineering machinery suitable for harsh working conditions, comprising a tread 1 and a shoulder 2, wherein pattern block groups 3 are evenly arranged along the circumference of the tread 1, and pattern grooves are formed between adjacent pattern block groups 3, and each pattern block group 3 is sequentially composed of a first pattern block 4, a second pattern block 5 and a third pattern block 6 from one side of the tread 1 to the other side, wherein the first pattern block 4 and the third pattern block 6 are centrally symmetrical about the 3 centers of the pattern block group, and the second pattern block 5 itself is centrally symmetrical about the 3 centers of the pattern block group;

[0006] A transverse connecting reinforcing rib 12 is disposed between the second pattern block 5 and the first pattern block 4 and the third pattern block 6, respectively. The transverse connecting reinforcing rib 12 is a wedge-shaped structure that becomes thicker from both sides to the middle.

[0007] Furthermore, an annular protrusion 31 is provided on the surface of the first pattern block 4, the second pattern block 5, and the third pattern block 6, and the annular protrusion 31 changes from high to low on the edge of the pattern block on one side; and changes from high to low on the middle of the pattern block on the other side, wherein the height relationship is that the annular protrusion 31 is the highest, the edge of the pattern block is the lowest, and the height of the middle of the pattern block is between the two.

[0008] Furthermore, each generatrix of the tire tread 1 passes through the annular protrusion 31 of at least two of the first pattern block 4 , the second pattern block 5 , and the third pattern block 6 .

[0009] Furthermore, the surface of the second pattern block 5 is in an inclined Z-shape, with the two ends of the Z-shape pointing to the first pattern block 4 and the third pattern block 6 respectively; the surfaces of the first pattern block 4 and the third pattern block 6 are in a shovel shape, with the shovel mouth facing the tire shoulder 2.

[0010] Furthermore, the ratio of the surface area of ​​the first pattern block 4 and the third pattern block 6 to the second pattern block 5 is in the range of 40% to 55%.

[0011] Furthermore, a depression 9 is provided inwardly at the Z-shaped end of the second tread block 5 at the corner in the circumferential direction of the tire, the width of the depression 9 is 0.06-0.10 of the longitudinal width of the second tread block 5, and the angle range of the depression 9 is 95°-105°.

[0012] Furthermore, the maximum thickness of the transverse connecting reinforcing rib 12 is 1 / 3-2 / 3 of the thickness of the second pattern block 5, and the transverse connecting reinforcing rib 12 is stepped.

[0013] Furthermore, two adjacent second pattern blocks 5 are connected via a longitudinal connecting reinforcing rib 11 , and the thickness of the longitudinal connecting reinforcing rib 11 is 1 / 6 to 1 / 5 of the thickness of the second pattern block 5 .

[0014] Compared with the prior art, the middle pattern block of the utility model is an integral second pattern block, which has better lateral continuity than the traditional 2 to 4 middle pattern blocks. The transverse connecting reinforcement ribs between the second pattern block and the first pattern block and the third pattern block respectively tend to thicken from both sides to the middle, which can effectively prevent the longitudinal cutting force from causing the edge pattern blocks to fall off and the groove bottom to crack. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional picture of the tire pattern of engineering machinery;

[0016] Figure 2 It is a schematic diagram of the tread structure of an engineering machinery tire pattern;

[0017] Figure 3 yes Figure 2 Magnified view of the middle depression;

[0018] Figure 4 It is a three-dimensional modeling effect diagram of the tire pattern of engineering machinery;

[0019] Figure 5 It is a finite element analysis diagram of the engineering machinery tire pattern.

[0020] Among them, there are tread 1, longitudinal connecting reinforcing ribs 11, transverse connecting reinforcing ribs 12, tire shoulders 2, pattern block groups 3, annular protrusions 31, first pattern blocks 4, second pattern blocks 5, third pattern blocks 6, and depressions 9. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the present utility model, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0023] As attached Figure 1-4 As shown, a tire pattern for engineering machinery suitable for harsh working conditions comprises a tread 1 and a shoulder 2, wherein pattern block groups 3 are evenly distributed along the circumference of the tread 1, and pattern grooves are formed between adjacent pattern block groups 3, and each pattern block group 3 is composed of a first pattern block 4, a second pattern block 5 and a third pattern block 6 from one side of the tread 1 to the other side, wherein the first pattern block 4 and the third pattern block 6 are centrally symmetrical about the center of the pattern block group 3, and the second pattern block 5 itself is centrally symmetrical about the center of the pattern block group 3;

[0024] A transverse connecting reinforcing rib 12 is disposed between the second pattern block 5 and the first pattern block 4 and the third pattern block 6, respectively. The transverse connecting reinforcing rib 12 is a wedge-shaped structure that becomes thicker from both sides to the middle.

[0025] In actual use, the applicant first used a traditional tire, and then found that the multiple pattern blocks in the middle were cracked longitudinally, and the pattern blocks on the side were cracked and broken, so he proposed to combine the multiple pattern blocks in the middle into a whole to produce a design. After that, the finite element analysis showed that Figure 5It was found that the longitudinal edge stress between the tread blocks was relatively large, so a thickened structure was proposed for the transverse connecting reinforcing ribs 12, so that the integral second tread block had better lateral continuity than the traditional 2 to 4 middle tread blocks. The thickening of the transverse connecting reinforcing ribs 12 can effectively prevent the longitudinal cutting force from causing the edge tread blocks to fall off and the groove bottom to crack, which helps to further improve the tire's cutting resistance, rigidity and stability in harsh road conditions.

[0026] Furthermore, an annular protrusion 31 is provided on the surface of the first pattern block 4, the second pattern block 5, and the third pattern block 6, and the annular protrusion 31 changes from high to low on the edge of the pattern block on one side; and changes from high to low on the middle of the pattern block on the other side, wherein the height relationship is that the annular protrusion 31 is the highest, the edge of the pattern block is the lowest, and the height of the middle of the pattern block is between the two.

[0027] The structure of the annular protrusion 31 is based on the structure of CN202011198634.4 proposed by the applicant, which solves the problems of uneven stress distribution and abnormal wear of the pattern block under the working state, which affect the overall life and appearance of the tire. The effect is that when the ground is under pressure, the annular protrusion 31 touches the ground first. At this time, the peripheral edge of the pattern block and the center point of the pattern block have not yet touched the ground, leaving space for the lateral expansion of the rubber. The annular protrusion 31 expands laterally under pressure, which can fill the recessed area inside the annular protrusion 31, as well as the recessed area outside the annular protrusion 31, which can effectively alleviate the edge stacking effect of the pattern block of the traditional structure and the uneven distribution of ground pressure / stress caused by it, thereby improving the service life of the tire.

[0028] Preferably, the annular raised area CD makes the lowest position of the pattern block surface at the pattern block edge area DE, the height of the pattern block center area A is also lower than the height of the annular raised area BC, and is in a concave state. The annular raised area CD is located in the area between the pattern block edge area DE and the pattern block AC. The height difference between the highest point position in the annular raised area and the lowest point E on the pattern block surface is 1-6mm, which can effectively reduce the stress / strain of the pattern block edge, reduce the occurrence of pattern block edge block drop in the early use of the tire, improve the rigidity of the pattern block, and improve the service life of the tire. At the same time, because the pattern block surface is uneven, the adhesion between the pattern surface and the ground can be increased, thereby improving the traction ability of the pattern block surface.

[0029] Based on the above structure of the annular protrusion 31, further, each generatrix of the tire tread 1 passes through the annular protrusion 31 of at least two of the first pattern block 4, the second pattern block 5, and the third pattern block 6. The specific purpose of this arrangement is to ensure that at least two pattern blocks (theoretically) are grounded at every moment of driving, and preferably, as Figure 2As shown in , the lower part of the annular protrusion 31 of the third pattern block 6 overlaps with the upper part of the annular protrusion 31 of the first pattern block 4 of the next pattern block group 3, ensuring the force connection between the first pattern block 4 and the third pattern block 6 to ensure the overall continuity.

[0030] Furthermore, the surface of the second pattern block 5 is in an inclined Z-shape, with the two ends of the Z-shape pointing to the first pattern block 4 and the third pattern block 6 respectively; the surfaces of the first pattern block 4 and the third pattern block 6 are shovel-shaped, with the shovel mouth facing the tire shoulder 2, and the composed pattern block group 3 is in a two-fold broken line shape as a whole.

[0031] Furthermore, the ratio of the surface area of ​​the first pattern block 4 and the third pattern block 6 to the second pattern block 5 is in the range of 40% to 55%, and the first pattern block 4, the second pattern block 5 and the third pattern block 6 are preferably configured as large pattern blocks, thereby increasing the driving performance of the tire.

[0032] Preferably, the second pattern block 5 has a certain angle with the tread width direction, and the angle range is 30°-40°.

[0033] Further, such as Figure 2-3 As shown, the Z-shaped end of the second pattern block 5 is provided with a recess 9 inwardly at the corner in the circumferential direction of the tire, the width of the recess 9 is 0.06-0.10 of the longitudinal width of the second pattern block 5, and the angle range of the recess 9 is 95°-105°. Figure 5 According to the finite element analysis in , the stress at this location is relatively large without a recess. The specific reason is that the generatrix at this location just leaves the tail end of the first pattern block 4 or the third pattern block 6. Therefore, when the generatrix at the corner of the second pattern block 5 does not coincide with one of the first pattern block 4 or the third pattern block 6, the stress at the corresponding corner of the second pattern block 5 is relatively large, and a recess needs to be set.

[0034] Furthermore, the maximum thickness of the transverse connecting reinforcement rib 12 is 1 / 3-2 / 3 of the thickness of the second pattern block 5, and the transverse connecting reinforcement rib 12 is stepped, corresponding to the finite element analysis results and the greater the stress is towards the middle, the thicker the transverse connecting reinforcement rib 12 needs to be to increase the connection strength.

[0035] Preferably, the width (lateral direction in the figure) of the transverse connecting reinforcing rib 12 is 0.4-0.5 of the width of the first pattern block 4 and the third pattern block 6 .

[0036] Furthermore, two adjacent second pattern blocks 5 are connected via a longitudinal connecting reinforcing rib 11 , and the thickness of the longitudinal connecting reinforcing rib 11 is 1 / 6 to 1 / 5 of the thickness of the second pattern block 5 .

[0037] Preferably, the vertical length of the longitudinal connecting reinforcing rib 11 is 0.1-0.25 of the vertical length of the second pattern block 5 .

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A tire pattern for construction machinery suitable for use in harsh working conditions, comprising a tread (1) and a shoulder (2), wherein pattern block groups (3) are evenly distributed along the circumference of the tread (1), and pattern grooves are formed between adjacent pattern block groups (3), and the tire pattern is characterized in that: Each group of pattern blocks (3) comprises, from one side of the tread (1) to the other side, a first pattern block (4), a second pattern block (5) and a third pattern block (6), wherein the first pattern block (4) and the third pattern block (6) are centrally symmetrical about the center of the pattern block group (3), and the second pattern block (5) itself is centrally symmetrical about the center of the pattern block group (3); A transverse connecting reinforcement rib (12) is respectively arranged between the second pattern block (5) and the first pattern block (4) and the third pattern block (6); the transverse connecting reinforcement rib (12) is a wedge-shaped structure that becomes thicker from both sides to the middle.

2. The tire pattern for construction machinery suitable for harsh working conditions as claimed in claim 1, characterized in that: The surfaces of the first pattern block (4), the second pattern block (5), and the third pattern block (6) are provided with an annular protrusion (31), and the annular protrusion (31) changes from high to low at the edge of the pattern block on one side; and the annular protrusion (31) changes from high to low at the middle of the pattern block on the other side, wherein the height relationship is that the annular protrusion (31) is the highest, the edge of the pattern block is the lowest, and the height of the middle of the pattern block is between the two.

3. The tire pattern of an engineering machinery suitable for harsh working conditions as claimed in claim 2, characterized in that: Each generatrix of the tire tread (1) passes through the annular protrusion (31) of at least two of the first pattern block (4), the second pattern block (5), and the third pattern block (6).

4. The tire pattern for construction machinery suitable for harsh working conditions as claimed in claim 1, characterized in that: The surface of the second tread block (5) is in an inclined Z-shape, with the two ends of the Z-shape pointing towards the first tread block (4) and the third tread block (6) respectively; the surfaces of the first tread block (4) and the third tread block (6) are in a shovel shape, with the shovel openings facing the tire shoulder (2).

5. The tire pattern of an engineering machinery suitable for harsh working conditions as claimed in claim 4, characterized in that: The ratio of the surface area of ​​the first pattern block (4) and the third pattern block (6) to the surface area of ​​the second pattern block (5) is in the range of 40% to 55%.

6. The tire pattern for construction machinery suitable for harsh working conditions as claimed in claim 4, characterized in that: A recess (9) is provided inwardly at the corner of the Z-shaped end of the second pattern block (5) facing the circumferential direction of the tire, the width of the recess (9) is 0.06-0.10 of the longitudinal width of the second pattern block (5), and the angle range of the recess (9) is 95°-105°.

7. The tire pattern for construction machinery suitable for harsh working conditions as claimed in claim 1, characterized in that: The maximum thickness of the transverse connecting reinforcing rib (12) is 1 / 3 to 2 / 3 of the thickness of the second pattern block (5), and the transverse connecting reinforcing rib (12) is in a stepped shape.

8. The tire pattern for construction machinery suitable for harsh working conditions as claimed in claim 1, characterized in that: Two adjacent second pattern blocks (5) are connected via a longitudinal connection reinforcement rib (11), and the thickness of the longitudinal connection reinforcement rib (11) is 1 / 6 to 1 / 5 of the thickness of the second pattern block (5).

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