CN218257574U - Snow tire with asymmetric patterns - Google Patents

Abstract

The utility model relates to the field of tires, in particular to a snowfield tire with asymmetric patterns, which comprises a tire tread, wherein the tire pattern is arranged on the tire tread; the tyre pattern comprises an inside crown pattern; the inboard crown tread includes a first inboard crown groove having a first bend; a second inner side tire crown groove for communicating the first inner side tire crown groove and the second inner side tire crown groove is arranged between the adjacent first inner side tire crown grooves, the inclination direction of the second inner side tire crown groove is opposite to that of the first inner side tire crown groove, and a third bend is formed at the joint of the first inner side tire crown groove and the second inner side tire crown groove; the first inner side crown groove and the second inner side crown groove divide a first inner side crown pattern block and a second inner side crown pattern block on the inner side crown pattern; under the action of the first bend, a first interlocking structure is formed between the first inner crown pattern blocks; and under the action of the third bend, a second interlocking structure is formed between the first inner crown pattern block and the second inner crown pattern block. The grip force is improved by the interlocking structure.

Description

Snow tire with asymmetric patterns

Technical Field

The utility model belongs to the technical field of the tire and specifically relates to an asymmetric snow tire of flower line.

Background

The temperature is lower in winter, the grip of the common tire is reduced, the braking performance is reduced, and certain hidden danger is brought to driving safety. Especially, when running on snow, the conventional tire is very likely to slip. Therefore, tires specially used in winter have appeared, and compared with common tires, snow tires with asymmetric patterns are greatly different in tire pattern and material design, and are specially designed mainly for snowy and wet road surfaces in winter. The asymmetric pattern of the snow tire may allow the wheel to provide better grip and shorter braking distance while traveling on snow.

In chinese utility model patent (publication No. CN216993779U, published as 20220719), a high performance semi-steel passenger car tire capable of coping with various winter road conditions is disclosed, which enhances the performance of the tire on snow, ice and dry ground by providing asymmetric tire patterns on the tread and by providing different functional patterns at different positions on the tread. And the inner side of the outer crown pattern block is provided with a longitudinal concave-convex interlocking groove to improve the ground gripping force.

However, the above tire has the following problems: although having improved the grip through setting up unsmooth interlocking slot to a certain extent, the interlocking slot is mainly at longitudinal extension, and the zigzag degree is not enough, leads to the interlocking effect not obvious, grips the space that the grip still exists the promotion.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned not enough problem of grip ability, the utility model aims at providing an asymmetric snowfield tire of flower line for the grip ability of tire further promotes through setting up tortuous interlocking structure in the tire hat decorative pattern of inboard.

For the purpose of the utility model, the following technical scheme is adopted for implementation:

a snowfield tire with asymmetric patterns comprises a tread, wherein the tread is provided with a circumferentially extending tire pattern; along tire width direction by outside to interior, the tire decorative pattern includes in proper order: an outer shoulder pattern, an outer crown pattern, an inner crown pattern and an inner shoulder pattern; an outer longitudinal groove, a middle longitudinal groove and an inner longitudinal groove which extend in the circumferential direction are respectively formed between the outer tire shoulder pattern and the outer tire crown pattern, between the outer tire crown pattern and the inner tire crown pattern and between the inner tire crown pattern and the inner tire shoulder pattern;

the inner side tire crown patterns comprise a plurality of first inner side tire crown grooves which are arranged along the circumferential direction, the outer ends of the first inner side tire crown grooves are communicated with the middle longitudinal groove, and the inner ends of the first inner side tire crown grooves are communicated with the inner side longitudinal groove; the first inner crown groove is arranged in an inclined way on the whole; the first inner crown groove is provided with a first bend, and the first bend faces to the circumferential direction of the tire;

a second inner side tire crown groove for communicating the first inner side tire crown grooves and the second inner side tire crown grooves is arranged between the adjacent first inner side tire crown grooves, the second inner side tire crown grooves extend linearly and are arranged in an inclined mode, the inclined direction is opposite to that of the first inner side tire crown grooves, and a third bend is formed at the joint of the first inner side tire crown grooves and the second inner side tire crown grooves; the second inner side crown groove is close to the center of the inner side crown pattern in the width direction;

the first inner crown groove and the second inner crown groove divide a first inner crown pattern block and a second inner crown pattern block on the inner crown pattern; under the action of the first bend, a first interlocking structure is formed between the first inner crown pattern blocks; and under the action of the third bend, a second interlocking structure is formed between the first inner crown pattern block and the second inner crown pattern block.

Preferably, under the action of the first bending, a first bulge and a first recess are respectively formed on two opposite sides of the first inner crown block in the circumferential direction, and the first bulge extends into the first recess of the other first inner crown block to form the first interlocking structure;

under the third bending action, a second recess is formed on the inner side of the adjacent first inner side crown pattern block, a second bulge is formed on the outer side of the second inner side crown pattern block, and the second bulge extends into the second recess to form the second interlocking structure.

Preferably, the first inner crown groove comprises a first groove section and a second groove section, the outer end of the first groove section is communicated with the middle longitudinal groove, and the inner end of the first groove section is communicated with the second groove section; the first groove section and the second groove section are obliquely arranged, and the oblique directions of the first groove section and the second groove section are opposite, so that the first bend is formed.

Preferably, the first inner side crown groove further comprises a third groove section, the third groove section is connected to the inner end of the second groove section, and the inner end of the third groove section is communicated with the inner side longitudinal groove; the third groove segment and the second groove segment have different inclination angles, so that a second bend is formed at the joint.

Preferably, the second inboard crown groove has an upper end connected to the second groove section and a lower end connected to the third groove section.

Preferably, the first trench segment and the second trench segment are approximately perpendicular; the second groove segment and the second inboard crown groove are approximately perpendicular.

Preferably, the first groove section inclination angle is 25-40 °; the inclination angle of the second groove section is 50-70 degrees; the inclination angle of the third groove section is 15-30 degrees; the inclination angle of the second inner crown groove is 25-40 degrees; the included angle between the first groove section and the second groove section is 85-95 degrees; the included angle between the second groove segment and the second inner crown groove is 85-95 degrees.

Preferably, the outer shoulder patterns comprise a plurality of outer shoulder transverse ditches arranged along the circumferential direction, the outer shoulder transverse ditches extend linearly and are arranged obliquely at a small angle, and the inner ends of the outer shoulder transverse ditches are connected into the outer longitudinal ditches; the outer tire shoulder transverse groove is divided into outer tire shoulder pattern blocks on the outer tire shoulder patterns;

the inclination angle of the lateral groove of the outer tire shoulder is 3-10 degrees; the edge angle of the outer shoulder pattern block is close to 90 degrees; the outboard shoulder blocks are substantially rectangular.

Preferably, the outer tire crown patterns comprise a plurality of outer tire crown transverse ditches which are arranged along the circumferential direction, the outer tire crown transverse ditches are obliquely arranged at a large angle, and the outer ends of the outer tire crown transverse ditches are connected into the outer longitudinal ditches and aligned with the outer tire shoulder transverse ditches; the inner end of the lateral crown transverse groove is connected in the middle longitudinal groove; the outer crown transverse groove is provided with outer crown pattern blocks at the division positions on the outer crown patterns;

the inclination angle of the lateral crown transverse groove at the outer side is 30-50 degrees; the outer crown pattern block is roughly quadrangular;

a linear fine groove extending in a longitudinal linear mode is arranged on the outer surface of the outer crown pattern block and is close to the middle of the outer crown pattern block in the width direction; the end of the straight fine groove is connected in the lateral crown transverse groove at the outer side.

Preferably, the inner tire shoulder patterns comprise a plurality of inner tire shoulder transverse grooves which are arranged along the circumferential direction, the inner tire shoulder transverse grooves extend linearly and are arranged in a small-angle inclined mode, and the outer ends of the inner tire shoulder transverse grooves are connected into the inner longitudinal grooves and are aligned with the outer ends of the first inner tire crown grooves; the inner tire shoulder transverse groove cuts an inner tire shoulder pattern block on the inner tire shoulder pattern;

the inclination angle of the inner shoulder transverse groove is 3-10 degrees, and the edge angle of the inner shoulder pattern block is close to 90 degrees.

To sum up, the utility model has the advantages that: a first bend is arranged in the first inner side crown groove, so that a first bulge and a first recess are formed on the first inner side crown pattern block, the first bulge extends into the first recess of the other first inner side crown pattern block to form a first interlocking structure, and the ground gripping force is improved; in addition, the junction of first inboard child hat slot and the inboard child hat slot of second forms the third and bends to the inboard second of first inboard child hat decorative block is sunken, and the outer end of the inboard child hat decorative block of second forms the second arch, and the second arch stretches into and forms second interlocking structure in the second is sunken, improves and grabs the land fertility.

Drawings

Fig. 1 is a developed view of a snow tire tread with an asymmetric pattern.

Fig. 2 is a schematic structural view of an inside crown tread pattern.

FIG. 3 is a schematic representation of a pattern of a comparative example.

Detailed Description

In the present embodiment, in a state where the tire is mounted on the wheel of the vehicle, the side of the tire near the center in the vehicle width direction is defined as the inner side, and conversely, the outer side.

As is known, a tire includes a tread extending annularly around the tire circumferential direction and sidewalls provided on both sides in the tread width direction. The tire tread comprises a crown positioned in the center and tire shoulders arranged on two sides of the crown in the width direction, and the end parts of the tire shoulders are connected with the tire sides.

A schematic structural view of the tread in a spread-out flat state is shown in fig. 1, and a left shoulder line a and a right shoulder line b are also shown in fig. 1. A circumferentially extending tread pattern is provided on the tread between the left shoulder line a and the right shoulder line b, and it is apparent from the figure that the tread pattern is asymmetric. That is, the left pattern and the right pattern in fig. 1 have different shapes, so that when the tire contacts with the ground, the stress and the performance at each position are inconsistent, the functions at each position can be fully exerted, and the comprehensive performance of the tire is improved.

As shown in fig. 1, the tread pattern includes, from the outside to the inside in the width direction of the tread (from left to right in fig. 1): an outboard shoulder pattern 10, an outboard crown pattern 20, an inboard crown pattern 30, and an inboard shoulder pattern 40, the four patterns being independent of each other, i.e., adjacent patterns do not directly contact each other.

In order to ensure that the patterns are not contacted, an outer longitudinal groove 50 which extends in a circumferential straight line is formed between the outer tire shoulder pattern 10 and the outer tire crown pattern 20, a middle longitudinal groove 60 which extends in a circumferential straight line is formed between the outer tire crown pattern 20 and the inner tire crown pattern 30, an inner longitudinal groove 70 which extends in a circumferential inclined mode is formed between the inner tire crown pattern 30 and the inner tire shoulder pattern 40, and the inner longitudinal groove 70 is in a fold line shape, so that noise is reduced, the groove area is increased, and the drainage and snow removal performance is enhanced. Specifically, the inner longitudinal groove 70 is formed by splicing a plurality of inclined longitudinal groove segments 71, and the included angle between the longitudinal groove segments 71 and the vertical direction is 8-15 degrees. The three longitudinal grooves can separate the patterns and improve the drainage and snow removal performance of the tire. And the width of the three longitudinal grooves is 5-10mm, namely the three longitudinal grooves have larger width, so that the drainage and snow removal performance is further improved.

In addition, step-shaped bumps are arranged inside the outer longitudinal groove 50, the middle longitudinal groove 60 and the inner longitudinal groove 70, chamfers are arranged on the bumps, stones and snow can be effectively prevented from being clamped by arranging the bumps in the grooves, the safe control performance and braking performance of the snowfield and the wetland are improved, and ideal traction force and better acceleration performance are brought.

The outer shoulder pattern 10 includes a plurality of outer shoulder lateral grooves 101 arranged in the circumferential direction of the tire, and the outer shoulder lateral grooves 101 can penetrate a water film, thereby improving the grip. The outer end (left end in fig. 1) of the outer-shoulder lateral groove 101 is located at the end of the tread, and the inner end (right end in fig. 1) of the outer-shoulder lateral groove 101 communicates with the outer-side longitudinal groove 50, so that accumulated water and accumulated snow in the outer-shoulder lateral groove 101 can be discharged inward or outward. The groove width of each part of the outer shoulder transverse groove 101 is approximately the same and is about 4-8mm, namely the outer shoulder transverse groove 101 has larger groove width, so that the ground gripping force can be further improved. The outboard shoulder transverse groove 101 extends substantially linearly and exhibits a small angle of inclination of 3-10 °. The inclination angle means an acute angle formed with the tire width direction. Thus, the outer-shoulder lateral groove 101 appears to extend mainly in the width direction of the tire, so that the outer-shoulder pattern 10 has good grip.

As shown in fig. 1, the outer shoulder pattern 10 is formed by dividing the outer shoulder lateral groove 101 into a plurality of outer shoulder blocks 11 arranged in the circumferential direction, i.e., the upper side and the lower side of each of the outer shoulder blocks 11 are divided by the outer shoulder lateral groove 101, and the inner side (the right side in fig. 1) of each of the outer shoulder blocks 11 is divided by the outer longitudinal groove 50, so that the outer shoulder blocks 11 are formed in a parallelogram shape as a whole. And because the inclination angle of outside shoulder horizontal ditch 101 is not big for outside shoulder decorative pattern piece 11 is more like the rectangle, and the corner of outside shoulder decorative pattern piece 11 is close 90 promptly, thereby makes outside shoulder decorative pattern piece 11 in the in-process with ground contact, can easily cut the water film, increases the actual area of contact of tread and ground, thereby promotes the land fertility of grabbing. Specifically, the length of the outer shoulder blocks 11 in the tire width direction is 40-50mm, and the length of the outer shoulder blocks 11 in the tire circumferential direction is 25-32mm. The outboard shoulder blocks 11 have a larger surface area than conventional tires, thereby increasing the block stiffness and preventing the blocks from creeping.

For the outboard crown pattern 20, which includes a plurality of outboard crown sipes 201 arranged in the circumferential direction of the tire, the outboard crown sipes 201 have outer ends (left ends in fig. 1) in communication with the outboard longitudinal grooves 50, and the outer ends are aligned with inner ends of the outboard shoulder sipes 101. The inner end (right end in fig. 1) of the outboard crown transverse groove 201 communicates with the intermediate longitudinal groove 60. The groove width is approximately the same throughout the outboard crown transverse groove 201, approximately 4-7mm. The outboard crown transverse groove 201 extends generally linearly, but may be slightly arcuate on the inside, within 10 °. The outer crown transverse groove 201 is integrally arranged in an inclined manner at a large angle of 30-50 degrees. Specifically, the left end of the outboard crown transverse groove 201 is lower than the right end. The lateral ditch 201 of the outside tire crown that the large-angle slope set up can cut the water film on the ground more effectively, thereby promoting the land gripping ability performance of the outside tire crown pattern 20.

As shown in fig. 1, the outer crown pattern 20 is cut by the outer crown transverse groove 201 to form a plurality of outer crown blocks 21 arranged along the circumferential direction, because the outer crown transverse grooves 201 are parallel to each other, and the outer longitudinal grooves 50 and the middle longitudinal groove 60 both extend in a longitudinal straight line, the outer crown blocks 21 are in a parallelogram shape, the upper side and the lower side of the outer crown blocks 21 are inclined at a large angle, so that the outer crown blocks 21 are inclined at a large angle as a whole, and the left end of the outer crown blocks 21 is lower than the right end. Further, the outer crown blocks 21 are approximately the same length throughout as the outer shoulder blocks 11 in the tire circumferential direction, and the left side of the outer crown blocks 21 is aligned with the right side of the outer shoulder blocks 11.

As shown in fig. 1, a linear groove 202 extending linearly in the tire circumferential direction is provided on the surface of the outer crown block 21, the linear groove 202 is located at the middle position in the width direction of the outer crown block 21, the upper end of the linear groove 202 is connected to the upper outer crown lateral groove 201, and the lower end of the linear groove 202 is connected to the lower outer crown lateral groove 201. The groove width of the linear fine groove 202 is 1.5-3mm. Although the outer crown block 21 is provided with the linear groove 202, the linear groove 202 does not divide the outer crown block 21 into two left and right independent blocks, in other words, the depth of the linear groove 202 is much smaller than the three longitudinal grooves. The linear sipe 202 is used to break the film of water when the tire is grounded.

As for the inner crown pattern 30, it comprises several first inner crown grooves 301 arranged in the circumferential direction of the tire, the inside of the first inner crown grooves 301 being formed with two bends having opposite opening directions. The outer end of the first inboard crown groove 301 communicates with the medial longitudinal groove 60 and the inner end of the first inboard crown groove 301 communicates with the medial longitudinal groove 70. The outer end of the first inner crown groove 301 is lower than the inner end of the first inner crown groove 301 in the tire circumferential direction.

Specifically, the first inboard crown groove 301 includes a first groove segment 3011, a second groove segment 3012, and a third groove segment 3013 that are in communication with one another in that order. The left end of the first slot 3011 section is communicated with the middle longitudinal channel 60, and the right end of the first slot 3011 section is communicated with the left end of the second slot section 3012. The first grooves 3011 extend linearly and are arranged obliquely with a height of 25 to 40 °. The length of the first groove 3011 is 10-18mm. The second trench section 3012 extends straight and is inclined from left to right at an angle of 50-70 °, and the angle between the second trench section 3012 and the first trench 3011 is close to vertical (± 5 °). A first fold 303 is formed between the second trench segment 3012 and the first trench 3011. The second trench segment 3012 has a length of 25-40mm. The left end of the third slot segment 3013 is connected to the right end of the second slot segment 3012, and the right end of the third slot segment 3013 is in communication with the inner longitudinal slot 70. The third slot section 3013 extends linearly and is inclined at a low left angle and a high right angle, and the inclination angle is 15-30 °. The length of the third slot segment 3013 is 20-30mm. The angle between the third slot segment 3013 and the second slot segment 3012 is 130-150 °. A second bend 304 is formed between the third trench segment 3013 and the second trench segment 3012. The first bend 303 and the second bend 304 are the above bends.

The inboard crown pattern 30 is formed with circumferentially aligned inboard crown blocks, and the inboard crown blocks appear primarily in an inclined arrangement, under the split of the first inboard crown groove 301.

A second inner crown groove 302 is also arranged between two adjacent first inner crown grooves 301, the second inner crown groove 302 extends in a straight line and is obliquely arranged in a left-high-right direction, and the inclination angle is 25-40 degrees. The upper end of the second inboard crown groove 302 is connected to the second groove segment 3012 above, and the lower end of the second inboard crown groove 302 is connected to the third groove segment 3013 below. The second inboard crown groove 302 is located near the center of the inboard crown tread. The junction of the second inboard crown groove 302 and the first inboard crown groove 301 forms a third bend 305. The angle between the second inboard crown groove 302 and the second groove segment 3012 is approximately vertical (± 5 °). The second inboard crown groove 302 further divides the inboard crown blocks into left and right distributed first inboard crown blocks 31 and second inboard crown blocks 32. The first and second inboard crown blocks 31, 32 have substantially equal areas.

The first inboard crown block 31 has a first concavity 311 on its upper side and a first convexity 312 on its lower side, the first concavity 311 and the first convexity 312 being formed by the first bend 303 described above. The first convex portion 312 of the upper first inboard crown block 31 extends into the first concave portion 311 of the lower first inboard crown block 31, thereby forming a first interlocking structure between the two first inboard crown blocks 31. During the tire ground contact, the first raised portion 312 and the first recessed portion 311 abut against each other, so that the rigidity of the first inside crown block 31 is enhanced, thereby improving the grip.

The right sides of two first inner crown blocks 31 adjacent up and down are formed with a second depressed portion 313 opened to the right side, the second inner crown block 32 is located in the second depressed portion 313, the second inner crown block 32 is pentagonal, the left side of the second inner crown block 32 is provided with a second convex portion 321, and the second convex portion 321 is formed by dividing the second groove section 3012 and the second inner crown groove 302 in the above. The second protrusion 321 extends into the second recess 313 to form a second interlocking structure. When the tire is in contact with the ground, the second raised portion 321 and the second recessed portion 313 abut, so that the first inner crown block 31 and the second inner crown block 32 are connected with each other, the rigidity of the two is improved, and the ground gripping force is improved.

As for the inner-shoulder pattern 40, it comprises a plurality of inner-shoulder sipes 401 arranged circumferentially, the left ends of the inner-shoulder sipes 401 being in communication with the inner longitudinal grooves 70 and the right ends being connected to the ends of the tread, so that the accumulated water and snow in the inner-shoulder sipes 401 can be discharged either inwards or outwards. The groove width of each part of the inner shoulder transverse groove 401 is approximately the same and is about 4-8mm, namely, the outer shoulder transverse groove 101 has larger groove width, so that the grip force can be further improved. The inboard shoulder cross grooves 401 extend linearly and exhibit a small angle of inclination of 3-10 °. Thus, the inner-shoulder lateral groove 401 appears to extend mainly in the width direction of the tire, so that the inner-shoulder pattern 40 has good grip.

As shown in fig. 1, the inner shoulder pattern 40 forms a plurality of inner shoulder blocks 41 arranged in the circumferential direction under the division of the inner shoulder lateral groove 401, that is, the upper side and the lower side of each of the inner shoulder blocks 41 are formed by dividing the inner shoulder lateral groove 401, and further, the outer side (left side in fig. 1) of each of the inner shoulder blocks 41 is formed by dividing the inner longitudinal groove 70, so that the inner shoulder blocks 41 are formed in a parallelogram as a whole, as shown in fig. 1. And because the inclination angle of inboard tire shoulder transverse groove 401 and inboard vertical groove 70 is not big for inboard tire shoulder decorative block 41 is more like the rectangle, and the corner of inboard tire shoulder decorative block 41 is close 90 to make inboard tire shoulder decorative block 41 in the in-process with ground contact, can easily cut the water film, increase the actual area of contact of tread and ground, thereby promote the grip. Specifically, the length of the inner shoulder block 41 in the tire width direction is 40 to 50mm, and the length of the inner shoulder block 41 in the tire circumferential direction is 25 to 32mm. The inboard shoulder blocks 41 have a larger surface area than conventional tires, thereby increasing the block stiffness and preventing the blocks from creeping.

As shown in fig. 1, the outer shoulder pattern 10, the outer crown pattern 20, the inner crown pattern 30, and the inner shoulder pattern 40 are provided with fine grooves 80 densely arranged therein, and the fine grooves 80 are zigzag-shaped and extend in the width direction of the tire. The inside of the thin groove 80 is provided with a steel sheet in a 3D form. The depth of the adjacent thin grooves 80 is not consistent, and the adjacent thin grooves are preferably arranged at intervals of different depths, so that the pattern blocks have reasonable rigidity, the control performance can be improved, and the phenomenon of block falling is avoided. Through the cooperation of the fine grooves 80 and the steel sheets, the safety performance of the wetland running on the ground and the snow is improved, and the traction force and the braking performance are improved.

In addition, the formula of the tire adopts the combination of natural rubber and low Tg modified solution polymerized styrene-butadiene rubber, and simultaneously fills high-content high-dispersion white carbon black to use environment-friendly oil and resin for plasticization, and more importantly, high-hardness hickory nut powder is added.

The modified formula has the following advantages: the high-dispersion white carbon black has better dispersion in rubber and more excellent sizing material performance, and the high white carbon black dosage can improve the wet grip performance of the tire and ensure the flexibility of the tire at extremely low temperature. The styrene block in the styrene-butadiene rubber can improve wet grip performance, and the combination of the styrene-butadiene rubber and the white carbon black can be improved through double-end modification, so that the grip of the tire on an ice water road surface is ensured. The formula is innovatively added with the high-hardness hickory powder by a ball milling method, and on a microscopic level, hickory powder particles can protrude out of the surface of the rubber to generate irregular edges and corners, so that the ground gripping performance of the tire on ice and water surfaces can be better improved.

To sum up, the utility model has the advantages that:

the edges and corners of the outer tire shoulder patterns and the wide grooves are easy to cut ice and snow, the ice and the snow in the grooves are easy to discharge, and the grip force of the tire on the ice and snow land is improved. The large pattern blocks effectively reduce the creeping among the pattern blocks and have strong controllability. Meanwhile, the performance of the wet land pavement is enhanced, good ground grabbing force is facilitated when the road is turned, and the road pavement in winter can be met.

The outer tire shoulder transverse groove and the inner tire shoulder transverse groove can effectively cut water films, and the contact area between rubber and the ground is increased, so that the ground grabbing force is improved.

The utility model provides a decorative pattern piece all has great area, can improve the control performance and the wear resistance of tire.

The decorative pattern piece in inboard child hat decorative pattern 30 forms interlocking structure, can reduce the deformation degree of tire, improves the rigidity, promotes and grabs the land fertility, and the vibrations of the ground tread are effectively reduced in the alternative contact ground of continuity simultaneously to reduce the tire noise.

Finally, the tires were tested for indoor and outdoor performance according to the relevant national standard test method (GB/T4502). The pattern structure of the comparative example is shown in fig. 3, and the main difference from the example is that: in general, the comparative example is a single-guide symmetrical pattern, and the example is a single-side single-guide asymmetrical pattern; the two patterns are distinguished, partially, by the inner crown pattern 30. All the test results were calculated based on a comparative example (see fig. 3) as 100, the test value (relative value) = example test value/comparative example test value × 100, the specific test results are shown in tables 1 and 2, tires with a specification of 205/55R16 were manufactured in a trial, and various properties in a test chamber and outdoor properties were tested, and the specific comparison is shown in tables 1 and 2.

Table 1 shows the comparison of indoor test performances of comparative examples and examples

Physical Properties	Comparative example	Examples
			High speed performance	100	101
Durability performance	100	100
			Rolling resistance	100	102
Overall rigidity	100	105
			Lateral deflection stiffness	100	104

As can be seen from the comparative examples and the examples in the table 1, the embodiment has the advantages of small difference between high speed, durability, rolling resistance and the comparative examples, strong integral rigidity, favorable control of the real vehicle test performance of the tire, good linear stability and good reaction sensitivity; the cornering stiffness is larger, and the controllability of the tire is good.

Table 2 shows the comparison of the outdoor properties of the comparative examples and the examples

Physical Properties	Comparative example	Examples
			Dry ground brake	100	101
Dry land control	100	100
			Wet land braking	100	102
Wetland control	100	103
			Snow brake	100	103
Snow field control	100	104
			Ice ground brake	100	102
Acceleration of ice ground	100	103

As can be seen from the comparative examples and examples in Table 2, the dry performance of the example is comparable to that of the comparative example; the wet land and the ice and snow land have better performance, and the tire has better control performance.

With the combination of tables 1 and 2, it can be seen that the snow-covered land has excellent snow-covered land gripping capacity and bearing capacity due to unique pattern design, and the snow-covered land has good performance according to test results, so that the driving safety and comfort in winter are ensured.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, and is provided in the accompanying drawings. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A snow tire with asymmetric patterns is characterized by comprising a tread, wherein the tread is provided with a circumferentially extending tire pattern; along tire width direction by outside to interior, the tire decorative pattern includes in proper order: an outer shoulder pattern, an outer crown pattern, an inner crown pattern and an inner shoulder pattern; an outer longitudinal groove, a middle longitudinal groove and an inner longitudinal groove which extend in the circumferential direction are respectively formed between the outer tire shoulder pattern and the outer tire crown pattern, between the outer tire crown pattern and the inner tire crown pattern and between the inner tire crown pattern and the inner tire shoulder pattern;

the inner side tire crown patterns comprise a plurality of first inner side tire crown grooves which are arranged along the circumferential direction, the outer ends of the first inner side tire crown grooves are communicated with the middle longitudinal groove, and the inner ends of the first inner side tire crown grooves are communicated with the inner side longitudinal groove; the first inner crown groove is arranged in an inclined mode on the whole; the first inner crown groove is provided with a first bend, and the first bend faces to the circumferential direction of the tire;

a second inner side tire crown groove for communicating the first inner side tire crown groove and the second inner side tire crown groove is arranged between the adjacent first inner side tire crown grooves, the second inner side tire crown groove extends linearly and is obliquely arranged, the oblique direction is opposite to that of the first inner side tire crown groove, and a third bend is formed at the joint of the first inner side tire crown groove and the second inner side tire crown groove; the second inner side crown groove is close to the center of the inner side crown pattern in the width direction;

the first inner side crown groove and the second inner side crown groove divide a first inner side crown pattern block and a second inner side crown pattern block on the inner side crown pattern; under the action of the first bend, a first interlocking structure is formed between the first inner crown pattern blocks; and under the action of the third bend, a second interlocking structure is formed between the first inner side crown pattern block and the second inner side crown pattern block.

2. A nonsymmetrical tread snow tire according to claim 1, wherein under the action of the first bend, first inner crown blocks are formed with first projections and first recesses on circumferentially opposite sides, respectively, the first projections extending into the first recesses of the other first inner crown block to form said first interlocking structure;

under the third bending action, a second recess is formed on the inner side of the adjacent first inner side crown pattern block, a second bulge is formed on the outer side of the second inner side crown pattern block, and the second bulge extends into the second recess to form the second interlocking structure.

3. A nonsymmetrical tread snow tire according to claim 2, wherein the first inboard crown groove includes a first groove segment and a second groove segment, the outer end of the first groove segment communicating with the intermediate longitudinal groove and the inner end of the first groove segment communicating with the second groove segment; the first groove section and the second groove section are both obliquely arranged, and the oblique directions of the first groove section and the second groove section are opposite, so that the first bend is formed.

4. A nonsymmetrical tread snow tire according to claim 3, wherein the first inboard crown groove further includes a third groove segment connected at an inner end of the second groove segment, the inner end of the third groove segment communicating with the inboard longitudinal groove; the third trench segment has a different slope angle than the second trench segment, thereby forming a second bend at the junction.

5. An asymmetric pattern snow tire as claimed in claim 4, wherein the second inboard crown groove is connected at its upper end to the second groove segment and at its lower end to the third groove segment.

6. An asymmetric tread snow tire as claimed in claim 4 or 5 wherein the first and second groove segments are approximately perpendicular; the second groove segment is approximately perpendicular to the second inboard crown groove.

7. An asymmetric tread snow tire according to claim 6 wherein the first groove segment angle of inclination is 25 to 40 °; the inclination angle of the second groove section is 50-70 degrees; the inclination angle of the third groove section is 15-30 degrees; the inclination angle of the second inner crown groove is 25-40 degrees; the included angle between the first groove section and the second groove section is 85-95 degrees; the included angle between the second groove segment and the second inner crown groove is 85-95 degrees.

8. The asymmetric-pattern snowfield tire of claim 1, wherein the outer-shoulder pattern includes a plurality of outer-shoulder transverse grooves arranged along the circumferential direction, the outer-shoulder transverse grooves extend linearly and are arranged obliquely at a small angle, and inner ends of the outer-shoulder transverse grooves are connected to the outer longitudinal grooves; the outer tire shoulder transverse groove is divided into outer tire shoulder pattern blocks on the outer tire shoulder patterns;

the inclination angle of the lateral groove of the outer tire shoulder is 3-10 degrees; the edge angle of the outer shoulder pattern block is close to 90 degrees; the outboard shoulder blocks are substantially rectangular.

9. A asymmetric tread snowfield tire as claimed in claim 1, wherein the outboard crown tread pattern comprises a plurality of outboard crown sipes arranged circumferentially, the outboard crown sipes being disposed at a steep incline, the outboard crown sipes having outer ends connected in the outboard longitudinal grooves and aligned with the outboard shoulder sipes; the inner end of the lateral crown transverse groove is connected in the middle longitudinal groove; the outer crown transverse groove is provided with outer crown pattern blocks at the division positions on the outer crown patterns;

the inclination angle of the lateral crown transverse groove at the outer side is 30-50 degrees; the outer crown pattern block is roughly quadrangular;

a linear fine groove extending in a longitudinal linear mode is arranged on the outer surface of the outer crown pattern block and is close to the middle of the outer crown pattern block in the width direction; the end of the straight fine groove is connected in the lateral crown transverse groove at the outer side.

10. The asymmetric tread snowfield tire of claim 1, wherein the inboard shoulder tread includes a plurality of inboard shoulder sipes arranged circumferentially, the inboard shoulder sipes extending linearly and being disposed at a small angular inclination, the outboard ends of the inboard shoulder sipes being connected within the inboard longitudinal groove and aligned with the outboard end of the first inboard crown groove; the inner tire shoulder transverse groove cuts an inner tire shoulder pattern block on the inner tire shoulder pattern;

the inclination angle of the inner tire shoulder transverse groove is 3-10 degrees, and the edge angle of the inner tire shoulder pattern block is close to 90 degrees.

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