CN112606630A

CN112606630A - Pneumatic tire tread pattern structure for cross-country sports

Info

Publication number: CN112606630A
Application number: CN202110015821.2A
Authority: CN
Inventors: 张淑媛; 刘冬兰
Original assignee: Cheng Shin Rubber Xiamen Ind Ltd
Current assignee: Cheng Shin Rubber Xiamen Ind Ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-04-06

Abstract

The invention discloses a tread pattern structure of a pneumatic tire for cross-country sports, wherein the tire tread consists of a central pattern block, a middle pattern block and a tire shoulder pattern block, the central pattern block and the middle pattern block are arranged side by side in the circumferential direction and the axial direction of the tire, the tire shoulder pattern block and the middle pattern block are arranged in a staggered manner, each pattern block is divided into a plurality of small pattern blocks by at least one fully-through pattern block and a groove with a full groove depth and a bell mouth on the central pattern block, the middle pattern block and the tire shoulder pattern block, and the fully-through pattern block and the groove with the full groove depth and the bell mouth are formed by combining a middle straight part and two bell mouths at two ends. By the arrangement, the edge components of each pattern block can be improved, the traction performance of the tire is improved, mud chips are effectively removed by using the horn mouth, the traction performance is further improved, the tire can exert excellent traction performance and ground gripping performance when the cross-country competition of a dirt road surface is carried out, the service life of the pattern block is ensured, and therefore excellent performance is obtained in the competition.

Description

Pneumatic tire tread pattern structure for cross-country sports

Technical Field

The invention relates to the technical field of tires, in particular to a pneumatic tire for cross-country sports.

Background

With the continuous development of off-road events, vehicles for the off-road events are changed, tires for matching the off-road events are diversified, and the tires are required to have excellent traction and soil removal performance in order to obtain excellent competition results. The conventional tire tread for the cross-country racing is generally a block-shaped pattern, as shown in fig. 1, the tread pattern 1 'of the conventional tire for the cross-country racing consists of a central pattern block 10', a middle pattern block 20 'and a tire shoulder pattern block 30', each pattern block is a regular or irregular large pattern block, and can provide traction performance and soil discharge performance for the cross-country racing, but when the tire of the road pavement type is used for the cross-country racing of wet soil, the speed is high, the ground contact area is too large, the pattern edge component is insufficient, the traction performance is poor, and mud chips cannot be effectively pushed away, so that the excellent traction performance is exerted. If the shallow grooves 11 ', 21 ' and 31 ' are added on the tread pattern blocks to improve the traction performance of the tire, the edge components of the pattern blocks can be improved, and partial traction performance can be improved.

Disclosure of Invention

The invention aims to provide a tread pattern structure of a pneumatic tire for cross-country competition, which can exert excellent traction performance and ground gripping performance when the tire is used for cross-country competition on a dirt road surface, ensure the service life of pattern blocks and further obtain excellent performance in competition.

In order to achieve the above purpose, the solution of the invention is:

the utility model provides a pneumatic tire tread pattern structure for cross-country sports, the tire tread comprises central pattern piece, middle decorative pattern piece and tire shoulder decorative pattern piece, central pattern piece and middle decorative pattern piece set up side by side in tire circumference and axial, the crisscross setting of tire shoulder decorative pattern piece and middle decorative pattern piece, central pattern piece, on middle decorative pattern piece and the tire shoulder decorative pattern piece respectively by a link up the decorative pattern piece entirely, the ditch groove of the deep and area horn mouth of full ditch is cut apart into a plurality of little decorative pattern pieces with each decorative pattern piece, link up the decorative pattern piece entirely, the ditch groove of the deep and area horn mouth of full ditch is formed by well straight portion and both ends horn mouth combination. By the arrangement, the edge components of each pattern block can be improved, the traction performance of the tire is improved, mud chips are effectively removed by using the horn mouth, the traction performance is further improved, the tire can exert excellent traction performance and ground gripping performance when the cross-country sports of a dirt road surface is performed, the service life of the pattern block is ensured, and therefore excellent performance is obtained in the competition.

Further, the opening width W1 of the horn mouth of the groove that link up the decorative pattern piece entirely, ditch all deeply and take the horn mouth sets up 2 times ~ 4 times of the width W of well straight portion, if the opening width undersize of horn mouth, can't effectively get rid of the mud bits, effectively improves traction performance, if the opening width undersize of horn mouth is too big, then decorative pattern piece intensity can be not enough, influences the life of decorative pattern piece to a certain extent.

Further, the horn mouth of the groove that link up the decorative block entirely, the full ditch is dark and take the horn mouth sets up 8% ~ 25% of each decorative block axial width L1 to the extension degree H1 of each decorative block toward, if the extension degree of horn mouth toward each decorative block is too shallow, also can't effectively get rid of the mud bits, improves traction performance, if the extension degree of horn mouth toward each decorative block is too dark, then the intensity of decorative block can be not enough, and the life of decorative block is influenced to a certain extent.

Further, a plurality of trapezoidal grooves or semicircular grooves alternately arranged in the circumferential direction are arranged on both sides of the straight portion of the groove having the bell mouth and the full depth near the full through pattern block, and the grip with the road surface can be improved.

Furthermore, the distance L2 between two circumferential trapezoidal grooves is set to be 4-10 mm, the grounding continuity can be ensured, and the road surface gripping performance can be effectively improved, the circumferential extension depth H2 of a single trapezoidal groove towards the pattern block is set to be 15-30% of the circumferential width L3 of each small pattern block, the depth H3 of the trapezoidal groove is set to be 15-30% of the depth H of each pattern block, the pattern block strength can be ensured, and the road surface gripping performance can be improved.

Furthermore, the middle part of the circumferential side edge of each small pattern block is provided with a raised line chain, and the small pattern blocks of each pattern block are mutually crosslinked into a whole through the raised line chain, so that the service life of the pattern block can be ensured, and the block falling is avoided.

Further, the axial width L4 of the convex strip chain extending to the outer side of each pattern block is 2 mm-4 mm, the width W2 of the convex strip chain is set to be 5% -30% of the circumferential width L3 of each small pattern block, the thickness H4 of the convex strip chain to each small pattern block is set to be 5% -30% of the depth H of each pattern block, if the axial width of the convex strip chain extending to the outer side is too long, the width of the convex strip chain is too wide or the thickness of the convex strip chain to each pattern block is too thick, each small pattern block cannot be reset at any time, the traction performance cannot be effectively improved, if the axial width of the convex strip chain extending to the outer side is too short, the width of the convex strip chain is too narrow or the thickness of the convex strip chain to each pattern block is too thin, the strength of the convex strip chain is insufficient, the convex strip chain is easy to break, the strength of the pattern block cannot be ensured, the service life of the pattern block is prolonged, and the convex strip chain can, when the tire runs, the small pattern block can be reset at any time, the pattern block falling or breaking phenomenon can be avoided, and the traction performance and the mud and chip removing performance of the pattern block are effectively improved.

Furthermore, the central pattern block is divided into four small transverse strip rectangular pattern blocks by three full-through central pattern blocks, three full-groove deep transverse grooves with bell mouths, the middle pattern block is divided into four small pattern blocks by three full-through middle pattern blocks, three full-groove deep transverse grooves with bell mouths, and the shoulder pattern block is divided into three small pattern blocks by two full-through shoulder pattern blocks, two full-groove deep transverse grooves with bell mouths.

Furthermore, the fully-through pattern blocks, the grooves with full depth and bell mouths, which are configured on the central pattern block, are transverse grooves, the middle pattern block is configured with two types of fully-through pattern blocks, the grooves with full depth and bell mouths, one type is an inclined groove, the other type is a folded groove, the fully-through pattern blocks, the grooves with full depth and bell mouths, which are configured on the shoulder pattern block, are folded grooves, the central pattern block is divided into four transverse strip rectangular small pattern blocks by three fully-through central pattern blocks and the transverse grooves with full depth and bell mouths, the middle pattern block is provided with one inclined groove and the folded grooves which are arranged at two sides of the inclined groove at intervals to divide the middle pattern block into four small pattern blocks, the shoulder pattern block is divided into three small pattern blocks by two folded grooves, and by the arrangement, the transverse and longitudinal pattern edge components of each pattern block can be improved, the traction performance of the wet mud pavement is improved.

Drawings

Fig. 1 is a schematic view of a tread pattern structure of a conventional tire for cross-country sports.

FIG. 2 is a schematic view of a tread pattern of a tire according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a tire tread with trapezoidal grooves according to an embodiment of the present invention.

Fig. 4 is a sectional view a-a' in fig. 3.

FIG. 5 is a schematic view of a tire tread with a rib chain according to an embodiment of the present invention.

Fig. 6 is a sectional view of B-B' in fig. 5.

Figure 7 is a top view of the middle block of figure 6.

FIG. 8 is a schematic view of another tire tread pattern configuration in accordance with an embodiment of the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1 to 8, the present invention discloses a tread pattern structure of a pneumatic tire for cross-country sports, which is defined as a tire axial direction in a lateral direction, a tire circumferential direction in a longitudinal direction, a tread center line CL, an inner side on a side close to the tread center line CL, and an outer side on a side away from the tread center line CL.

The invention mainly improves various performances of the tire through the optimization design of the tread pattern structure of the pneumatic tire for cross-country competition, the tire tread 1 is composed of a central pattern block 10, a middle pattern block 20 and a tire shoulder pattern block 30, the central pattern block 10 and the middle pattern block 20 are arranged side by side in the circumferential direction and the axial direction of the tire, the tire shoulder pattern block 30 and the middle pattern block 20 are arranged in a staggered way, each pattern block is divided into a plurality of small pattern blocks by at least one full through pattern block and a groove 11 with a bell mouth on the central pattern block 10, the middle pattern block 20 and the tire shoulder pattern block 30, the full through pattern block and the groove 11 with the bell mouth are formed by combining a middle straight part 11a and bell mouth 11b at two ends, in addition, a plurality of trapezoidal grooves 12 are arranged on two sides of the middle straight part 11a close to the full through pattern block and the full groove depth and the groove 11 with the bell mouth and are, meanwhile, the raised line chain 13 is arranged in the middle of the circumferential side edge of each small pattern block, the small pattern blocks are mutually crosslinked to form a whole, so that the edge components of each pattern block can be improved, the traction performance of the tire is improved, mud chips are effectively removed by using the horn mouth, the traction performance is further improved, in addition, a plurality of trapezoidal grooves are arranged on the pattern blocks, the gripping performance with the road surface can be improved, meanwhile, the raised line chain is adopted to mutually crosslink the small pattern blocks, the service life of the pattern blocks can be ensured, and the pattern blocks are prevented from falling.

As shown in FIG. 2, a schematic view of an embodiment of the tread pattern structure of the tire of the present invention is shown, wherein a full through block and a full groove deep and trumpet-shaped lateral groove 11 are disposed on all of the center block 10, the middle block 20 and the shoulder block 30, wherein the center block 10 is divided into four

small blocks

10a, 10b, 10c and 10d by three full through center blocks 10 and full groove deep and trumpet-shaped lateral grooves 11, the middle block 20 is divided into four

small blocks

20a, 20b, 20c and 20d by three full through middle blocks 20 and full groove deep and trumpet-shaped lateral grooves 11, the shoulder block 30 is divided into three

small blocks

30a, 30b, 20c and 20d by two full through shoulder blocks 30 and full groove deep and trumpet-shaped

lateral grooves

11, 30b and 30c, the edge composition of each pattern block can be improved, and the traction performance of a wet soil pavement can be improved.

Further, the fully-through pattern block, the fully-deep groove 11 with the bell mouth are formed by combining the middle straight part 11a and the two end bell mouths 11b, the opening width W1 of the bell mouth 11b is set to be 2 times to 4 times of the width W of the middle straight part 11a, mud chips cannot be effectively removed if the opening width of the bell mouth is too small, the traction performance is effectively improved, if the opening width of the bell mouth is too large, the strength of the pattern block can be insufficient, and the service life of the pattern block is influenced to a certain degree. In addition, the extending depth H1 of the bellmouth 11b to each pattern block is set to be 8% -25% of the axial width L1 of each pattern block, if the extending depth of the bellmouth 11b to each pattern block is too shallow, mud chips cannot be effectively removed, the traction performance is improved, if the extending depth of the bellmouth 11b to each pattern block is too deep, the strength of the pattern block is insufficient, and the service life of the pattern block is influenced to a certain degree.

As shown in fig. 3 and 4, in order to further improve the grip performance of the tire tread on a wet dirt road surface, a plurality of trapezoidal grooves 12 or semicircular grooves 12 are alternately arranged in the circumferential direction on both sides of a straight portion 11a which is close to a full through block and has a full groove depth and a bellmouth groove 11, and the tread center CL is not arranged, and in this embodiment, the trapezoidal grooves 12 are arranged such that the distance L2 between the two trapezoidal grooves 12 in the circumferential direction is set to 4mm to 10mm, thereby ensuring the ground contact continuity and effectively improving the grip performance of the road surface, 15% to 30% of the circumferential width L3 of each small block is provided to the circumferential extension depth H2 of the single trapezoidal groove 12 to the block in the circumferential direction, and as shown in the a-a' sectional view of fig. 3, the depth H3 of the trapezoidal groove 12 is set to 15% to 30% of the block depth H, thereby ensuring the block strength and improving the grip performance of the road.

As shown in fig. 5 to 7, in order to further ensure the service life of the tire, a convex strip chain 13 is arranged at the middle part of the circumferential side edge of each small block, and the small blocks are cross-linked to form a whole, wherein the axial width L4 of the convex strip chain 13 extending to the outer side of each block is 2mm to 4mm, the width W2 of the convex strip chain 13 is set to 5% to 30% of the circumferential width L3 of each small block, the thickness H4 of the convex strip chain 13 to each small block is set to 5% to 30% of the depth H of each block, if the axial width of the convex strip chain extending to the outer side is too long, the convex strip chain width is too wide, or the thickness of the convex strip chain to each block is too thick, each small block cannot be reset at any time, the traction performance cannot be effectively improved, if the axial width of the convex strip chain extending to the outer side is too short, the convex strip chain width is too narrow, or the thickness of the convex strip chain to each block is too thin, the intensity of sand grip chaining 13 can be not enough, and easy fracture can't guarantee the intensity of decorative block to improve the life of decorative block, so set up, usable sand grip chaining 13 is with each little decorative block cross-linking each other, when the tire is when going, can make little decorative block reset at any time, can avoid the decorative block to fall piece or rupture phenomenon, effectively improves the traction performance and the row mud bits performance of decorative block.

As shown in FIG. 8, another embodiment of the tread pattern structure of the tire of the present invention is illustrated, wherein the full through blocks and the full groove deep and bellmouthed grooves 11 disposed on the center blocks 10 are lateral grooves, two types of full through blocks and the full groove deep and bellmouthed grooves 21, one type is an inclined groove 211 and the other type is a folded groove 212, the full through blocks and the full groove deep and bellmouthed grooves disposed on the shoulder blocks 30 are folded grooves 212, the center blocks 10 are divided into four

small blocks

10a, 10b, 10c and 10d by three full through blocks and the full groove deep and bellmouthed grooves 11, the center blocks 20 are provided with one inclined groove 211 and the folded grooves 212 disposed at both sides of the inclined groove 211 to divide the center blocks 20 into four

small blocks

20a, 20b, 10c and 10d, and the center blocks 20 are provided with one inclined groove 211 and the folded grooves 212 disposed at both sides of the inclined groove 211 at intervals, 20b, 20c and 20d, the shoulder block 30 is divided into three

small blocks

30a, 30b and 30c by the two folding grooves 212, and by the arrangement, the transverse and longitudinal pattern edge components of each block can be improved, and the traction performance of a wet dirt pavement is improved.

The tire with the specification of 2.75-23 is manufactured and installed on an off-road vehicle, the wind pressure of 160kPa is filled to carry out a real vehicle test on a wet dirt road surface, and the real vehicle test of a driver evaluates that the traction performance and the mud chip removing performance of the embodiment of the tire are all superior to those of the prior example, and the phenomenon of block falling of pattern blocks does not occur.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims

1. The utility model provides a cross-country sports is with pneumatic tire tread pattern structure, tire tread comprises central pattern piece, middle decorative pattern piece and tire shoulder decorative pattern piece, its characterized in that: the central pattern block and the middle pattern block are arranged side by side in the circumferential direction and the axial direction of the tire, the tire shoulder pattern block and the middle pattern block are arranged in a staggered mode, each pattern block is divided into a plurality of small pattern blocks by at least one groove which is completely through, deep in groove and provided with a horn mouth, and the groove which is completely through, deep in groove and provided with the horn mouth is formed by combining a middle straight part and horn mouths at two ends.

2. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 1, wherein: the opening width W1 of the bell mouth of the fully through pattern block and the groove with the bell mouth is set to be 2-4 times of the width W of the middle straight part.

3. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 1 or 2, wherein: the extended depth H1 from the full-through pattern block and the bell mouth of the groove with the bell mouth to each pattern block is set to be 8% -25% of the axial width L1 of each pattern block.

4. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 1, wherein: and a plurality of trapezoidal grooves or semicircular grooves which are alternately arranged in the circumferential direction are arranged at two sides of a middle straight part of the groove which is close to the full-through pattern block, has full groove depth and is provided with a horn mouth.

5. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 4, wherein: the distance L2 between two trapezoidal grooves in the circumferential direction is set to be 4-10 mm, the extension depth H2 of a single trapezoidal groove to the circumferential direction of the pattern block is set to be 15-30% of the circumferential width L3 of each small pattern block, and the depth H3 of the trapezoidal groove is set to be 15-30% of the depth H of each pattern block.

6. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 1, wherein: the middle part of the circumferential side edge of each small pattern block is provided with a raised line chain, and the small pattern blocks of each pattern block are mutually crosslinked into a whole through the raised line chain.

7. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 6, wherein: the axial width L4 of the convex strip chain extending to the outer side of each pattern block is 2-4 mm, the width W2 of the convex strip chain is set to be 5-30% of the circumferential width L3 of each small pattern block, and the thickness H4 of the convex strip chain to each small pattern block is set to be 5-30% of the depth H of each pattern block.

8. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 1, wherein: the central pattern block is divided into four transverse strip rectangular small pattern blocks by three full-through central pattern blocks, a full-groove deep transverse groove with a bell mouth, the middle pattern block is divided into four small pattern blocks by three full-through middle pattern blocks, a full-groove deep transverse groove with a bell mouth, and the shoulder pattern block is divided into three small pattern blocks by two full-through shoulder pattern blocks, a full-groove deep transverse groove with a bell mouth.

9. A tread pattern structure of a pneumatic tire for cross-country sports according to claim 1, wherein: the tire shoulder tread pattern block comprises a central pattern block, a plurality of transverse strip rectangular small pattern blocks, a plurality of tire shoulder tread pattern blocks, and a plurality of tire shoulder tread pattern blocks.