CN212604307U

CN212604307U - Snow tire

Info

Publication number: CN212604307U
Application number: CN202022121931.0U
Authority: CN
Inventors: 吴承远
Original assignee: Cheng Shin Rubber Xiamen Ind Ltd
Current assignee: Cheng Shin Rubber Xiamen Ind Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-02-26
Anticipated expiration: 2030-09-24

Abstract

The utility model provides a snow tire, which is characterized in that a plurality of pattern units and a central pattern strip are arranged on a tire tread, the pattern units are provided with shovel-shaped outlines, the axial outlines of the pattern units are provided with arc curves, and the centers of the arc curves are positioned in a tire tread area; the pattern block ground contact surface in the pattern unit is provided with a plurality of sipes, the sipes are arranged along the axial direction, each sipe is provided with a circular opening head part and a non-circular section part, the circular opening head parts of the sipes in the same pattern block are positioned on the same straight line, and the section parts connected with the circular opening head parts are positioned on the circumferential front side of the sequentially adjacent section parts. The utility model provides a snow tire optimizes through the tread pattern structure to the tire, promotes tread pattern rigidity and tire durability when taking into account snow tire and grabbing the performance.

Description

Snow tire

Technical Field

The utility model relates to a technical field of tire to more specifically relates to a snow tire suitable for snow mud road conditions in winter.

Background

As a component contacting with a road surface, a tire is generally provided with longitudinal, transverse or criss-cross grooves on a tire tread, and the grooves divide the tread into a plurality of tread blocks. In the vehicle driving process, the tire tread groove can guide mud, water and the like to the outer side of the tire, so that the tire tread pattern blocks are ensured to be fully contacted with the road surface, good traction and gripping performance is provided for the vehicle, and the normal driving requirement is met.

The pattern of grooves and blocks of the tire tread varies from tire to tire. Snow tires, which are typically used on winter snow mud roads, have wavy fine grooves in the tread blocks to provide the tire with better traction and grip performance, ensuring vehicle safety.

Patent publication No. CN103009935A discloses a pneumatic tire having both snow performance and dry performance, in which a tread portion includes a main groove extending in a tire circumferential direction and bottom surface contact portions formed on both sides of the main groove, and sipe groups are provided in both side land portions across the main groove, the sipe groups being provided at both side land contact portions across the main groove at intervals in the tire circumferential direction, and being arranged at both sides of the main groove so as to be shifted in the tire circumferential direction, and the sipes being provided obliquely to the main groove. The tread patterns of the tire are arranged by adopting continuous ribs and independent pattern blocks to be matched with pattern fine grooves, the integral rigidity of the contact part of the patterns and the ground can meet the running performance of a dry road surface, but the pattern fine grooves are not uniformly arranged in a tread area and are arranged towards the outer side area of the tread in a mode of offsetting, so that the gripping performance of the tire is limited when the tire is on snow, and the pattern fine grooves are arranged towards the outer side area of the tread in a mode of offsetting, so that the uneven distribution of the pattern rigidity can influence the durability of the tire.

The patent with publication number CN109515072A discloses a snow tire for improving performance of ice and snow, the tread of which is composed of a plurality of pattern blocks formed by mutually intersecting and dividing a plurality of transverse grooves and main grooves which are arranged on the circumferential central axis of the tread and extend along the circumferential direction, the pattern blocks are symmetrically arranged in a staggered manner at the left side and the right side of the tread by the circumferential central axis of the tread, and a first pattern block, a second pattern block, a third pattern block and a rubber lug are arranged on the pattern blocks. The pattern blocks in the middle area and the shoulder area of the tread of the tire disclosed in the patent have the phenomenon of uneven rigidity, even if the pattern rigidity is increased by adopting a mode of arranging rubber lugs, the transition area between the middle area and the shoulder area of the tread is still easy to generate eccentric wear, and therefore the durability of the tire is influenced.

Therefore, it is the research and improved object of the present invention to develop a snow tire that satisfies the snow grip performance requirements and at the same time can improve the tread pattern rigidity and durability.

Disclosure of Invention

To the problem, the utility model provides a snow tire optimizes through the tread pattern structure to the tire, promotes tread pattern rigidity and tire durability when taking into account snow tire and grabbing the performance.

The technical scheme of the utility model is that:

a snow tire comprising a tire body comprising a tread, the tread being arranged with a plurality of pattern elements and a central pattern strip, the pattern elements having a spade-like profile, the axial profile of the pattern elements having an arc curve with the centre of the arc curve located within the tread area;

the pattern units comprise middle pattern blocks and side pattern groups, the side pattern groups comprise side first pattern blocks and side second pattern blocks, and the side second pattern blocks are arranged on one side of the side first pattern blocks in the circumferential direction at intervals;

the pattern block ground contact surface in the pattern unit is provided with a plurality of sipes, each sipe is provided with a circular opening head part and a non-circular section part, the circular opening head part faces to the middle area of the pattern unit, the circular opening head parts of the sipe in the same pattern block in the pattern unit are positioned on a straight line, and the section part connecting the circular opening head parts is positioned on the circumferential front side of the adjacent section parts in sequence;

the tire tread structure is characterized in that a central pattern strip is arranged on the inner side in the axial direction of the pattern units, the central pattern strip extends along the circumferential direction of the tire central plane in a closed manner, the circumferential edge profile of the central pattern strip comprises a notch which is concave towards the tire central plane and a circumferential edge profile unit which is connected with the notch, and the circumferential edge profile unit is designed in a two-section type angle manner.

Furthermore, the end points of the circular arc curves of the axial profiles of the pattern units have a certain distance in the circumferential direction of the tire, and the distance between the end points on the two sides of the circular arc curves of the axial profiles of the pattern units in the circumferential direction is 13-40% of the circumferential length between the adjacent pattern units.

Further, the circular opening head of the intermediate block upper sipe faces the axial outer side of the intermediate block, and the section part of the intermediate block upper sipe extends to the axial inner side of the intermediate block;

the circular opening head part of the lateral first pattern block upper sipe faces to the axial inner side of the lateral first pattern block, and the section part of the lateral first pattern block upper sipe extends to the axial outer side of the lateral first pattern block;

the circular opening head of the sipe on the side edge second block faces the axial inner side of the side edge second block, and the section part of the sipe on the side edge second block extends to the axial outer side of the side edge second block.

Further, the blocks in the pattern unit are provided with not less than 3 sipes, and the diameter of the circular opening head part is not less than 3 times of the width of the section part.

Further, the section parts of the sipes on the block grounding surface in the pattern unit are not less than 2.

Further, the circumferential edge profile elements of the central tread band comprise a first circumferential edge profile connecting the rear sides of the incisions and a second circumferential edge profile connecting the front sides of the incisions; the second circumferential edge profile is provided with a plurality of bar-shaped sipes.

Furthermore, a plurality of triangular pyramid type grooves are arranged on the central pattern strip at intervals along the central plane of the tire.

Furthermore, a plurality of triangular pyramid type grooves are arranged on the central pattern strip at intervals along the central plane of the tire, and the grounding edges of the triangular pyramid type grooves are arranged in parallel with the contour of the second circumferential edge of the central pattern strip.

Further, the first circumferential edge profile of the central tread band forms a greater angle with the circumferential direction of the tire than the second circumferential edge profile.

Further, the center pattern strip is replaced with a center pattern group formed of center pattern blocks arranged at intervals along the center plane of the tire, the center pattern blocks having scoop-like profiles, the axial front side widths of the center pattern blocks being not greater than the axial rear side widths of the center pattern blocks, the circumferential edge profiles of the center pattern blocks being provided with a plurality of sipes.

The utility model has the advantages that:

(1) the utility model provides a snow tire arranges a plurality of decorative pattern units and central decorative pattern strip at the tread, and the decorative pattern unit has shovel form profile, and its axial profile has the circular arc curve, and the center of circular arc curve is located tread area, can make the straight line instantaneous deceleration of tire when driving increase, also can increase the snow area of pushing away of tire simultaneously, promotes snow tire's the performance of grabbing; the end points of the arc curves of the axial profiles of the pattern units have a certain distance in the circumferential direction of the tire, so that the snow pushing area of the tire can be strengthened, and the snow gripping performance of the tire is improved.

(2) The ground contact surface of a pattern block in a pattern unit on the tire tread is provided with a plurality of sipes, the sipes are arranged along the axial direction, the number of sipes arranged on the pattern block is not less than 3, the sipes are provided with a circular opening head part and a non-circular section part, the diameter of the circular opening head part is not less than 3 times of the width of the section part, the circular opening head parts of the sipes in the same pattern block are positioned on a straight line, the section parts connected with the circular opening head parts are positioned on the circumferential front side of the sequentially adjacent section parts, the compression rigidity of the pattern unit can be enhanced through the superposition effect of the force with the circular opening head parts, the durability of the snow tire is improved, and the gripping performance of the snow tire is considered.

Drawings

Fig. 1 is a schematic structural view of a tire tread pattern of a first embodiment of the present invention;

FIG. 2 is an enlarged structural view of a pattern unit of a tire tread pattern according to a first embodiment of the present invention;

FIG. 3 is an enlarged schematic structural view of a central pattern strip of a tire tread pattern according to an embodiment of the present invention;

FIG. 4 is a schematic view of a sipe structure of a tire tread pattern according to an embodiment of the present invention;

FIG. 5 is a schematic view of a sipe structure of a tire tread pattern according to a second embodiment of the present invention;

fig. 6 is a schematic structural view of a tread pattern of a third embodiment of the present invention.

Detailed Description

To describe the present invention more clearly, the orientation of the tire is first defined: c.l. represents the tire center plane; near the tire center plane c.l. represents the inner side and far from the tire center plane c.l. represents the outer side; hereinafter, the horizontal direction of fig. 1 to 6 is the lateral direction, corresponding to the axial direction of the tire, the vertical direction is the longitudinal direction, corresponding to the circumferential direction of the tire, and the direction perpendicular to the paper surface is the radial direction of the tire.

Example one

As shown in fig. 1, the snow tire tread pattern structure of the first embodiment of the present invention is schematically illustrated, the tire tread is arranged with a central pattern strip 1, the central pattern strip 1 extends along the tire central plane c.l. circumferentially in a closed manner, pattern units P are arranged on both axial sides of the central pattern strip 1, the pattern units P on both axial sides of the central pattern strip 1 are symmetrically arranged about the tire central plane c.l, and are staggered at intervals in the tire circumferential direction by a certain distance.

The pattern unit P has a shovel-shaped outline, so that the snow pushing area of the tire can be effectively increased, and the snow cutting is accelerated, so that the snow gripping performance of the tire is improved. The pattern units P are arranged at intervals in the tire circumferential direction to form lateral main grooves 10. The pattern unit P comprises middle blocks 2 and side pattern groups 3, wherein the middle blocks 2 are arranged at intervals on two axial sides of a central pattern strip 1 to form longitudinal main grooves 20, the side pattern groups 3 are arranged at intervals on the axial outer sides of the middle blocks 2 to form longitudinal auxiliary grooves 30, the side pattern groups 3 comprise side first blocks 31 and side second blocks 32, the side second blocks 32 are arranged at intervals on one circumferential side of the side first blocks 31, and transverse auxiliary grooves 40 are formed between the circumferential intervals of the side first blocks 31 and the side second blocks 32 in the pattern unit P.

The axial profile of the pattern unit P has a circular arc curve, and the center of the circular arc curve is positioned in the tread area. To better explain the present design, as shown in fig. 2, the axial profile edges of the blocks of the pattern unit P are shifted toward the lateral main groove 10 or the lateral sub-groove 40 to form a virtual circular arc curve, that is, the axial profiles of the middle block 2 and the side first block 31 are shifted to the lateral main groove 10 to form a closed circular arc curve L1. The central point P1 of the circular arc curve L1 is located in the tread area and is not located on the axial outer side of the tread ground contact edge T, so that the pattern units P are stressed uniformly in the snow pushing process, and the integral rigidity of the pattern units P is guaranteed. Similarly, the axial profile edge of the side second block 32 is shifted to the transverse auxiliary groove 40 to form an arc curve L2, the center point P2 of the arc curve L2 is located in the tread area, but not axially outside the tread ground contact edge T, so that the side second block 32 assists in snow removal, the linkage of the side first block 31 and the side second block 32 is increased, the snow grip performance is improved, and the overall rigidity of the side first block 31 and the side second block 32 is enhanced, thereby improving the durability of the snow tire.

The end points of the circular arc curves of the axial profile of the pattern unit P have a certain distance in the circumferential direction of the tire, as shown in fig. 2, a straight line L3 and a straight line L4 are respectively made through the two end points of the circular arc curve L1 along the axial direction of the tire, the axial straight line L3 is located on the circumferential front side of the axial straight line L4, and a distance h between the axial straight line L3 and the axial straight line L4 in the circumferential direction of the first embodiment is 13.9% of the circumferential length between the adjacent pattern units P, that is, 1pitch marked in fig. 1. If the distance h between the axial straight line L3 and the axial straight line L4 in the circumferential direction is too large, that is, the axial inner end point of the arc curve L1 is too far away from the axial outer end point thereof, the stress center area of the pattern unit P will shift to the outer side of the tire during snow pushing, so that a snow pushing drag phenomenon is generated, and the pattern rigidity of the tire is weakened to reduce the durability of the tire; if the distance h between the axial straight line L3 and the axial straight line L4 in the circumferential direction is too small, that is, the axially inner end point of the circular arc curve L1 is too close to the axially outer end point thereof, the snow grip performance of the tire is ensured while the rolling resistance of the tire is increased. According to the evaluation of the snow gripping performance of a truck tire, the linear instantaneous deceleration a of the tire is an important index. The end points of the circular arc curve of the axial profile of the pattern unit P have a certain distance in the circumferential direction of the tire and the shovel-shaped profile of the pattern unit P can increase the linear instantaneous deceleration a of the tire, thereby improving the snow gripping performance of the tire.

As shown in fig. 3, which is an enlarged structural schematic view of a central pattern strip of a tire tread pattern according to the first embodiment, the circumferential edge profile 11 of the central pattern strip 1 includes a cut 111 concave toward the tire central plane c.l. and a circumferential edge profile unit 112 connecting the cut 111. The circumferential edge profiles 11 of the central pattern strips are arranged symmetrically with respect to the tire center plane c.l. and are staggered at intervals in the tire circumferential direction. The circumferential edge contour unit 112 is designed in a two-step angle, the circumferential edge contour unit 112 includes a first circumferential edge contour 112a connecting the rear side of the cut 111 and a second circumferential edge contour 112b connecting the front side of the cut 111, and an included angle α formed by the first circumferential edge contour 112a and the tire circumferential direction is larger than an included angle β formed by the second circumferential edge contour 112b and the tire circumferential direction. The included angle alpha formed by the first circumferential edge profile 112a and the tire circumference is larger, so that the tire can better cut into the ice and snow road surface during running, and the effect of saving labor and breaking snow is achieved; an included angle beta formed by the second circumferential edge profile 112b and the tire circumference is small, so that the snow removing area of the tire can be enlarged, meanwhile, broken snow in the notch 111 region is removed, the snow removing process of the tire is accelerated, and the gripping performance of the tire in snow driving is improved.

The second circumferential edge profile 112b is provided with a bar sipe 113, one end of the bar sipe 113 communicating with the longitudinal main groove 20. The rib sipes 113 can break the water film at the edges of the central rib 1, thereby improving the grip performance of the tire. The central pattern strip 1 is provided with triangular pyramid-shaped grooves 12 at intervals along the tire center plane c.l., and the ground contact edges 121 of the triangular pyramid-shaped grooves 12 are arranged in parallel with the second circumferential edge profile 112b of the central pattern strip 1. This arrangement can make the rigidity of the ground contact surface area of the central pattern strip 1 on both sides of the triangular pyramid-shaped groove 12 uniform. Meanwhile, the triangular pyramid type grooves 12 can break water films between the ground, increase the contact between the tire and the snow mud ground, improve the gripping performance of the tire, and ensure the running performance of the snow tire. Meanwhile, the triangular pyramid type groove 12 is arranged to avoid the sucking disc effect between the tire tread and the ice and snow road surface to a certain extent, so that the noise generated during the running of the tire can be properly reduced, and the running comfort is ensured.

The block ground contact surface in the pattern unit P is provided with a sipe having a circular opening head portion and a non-circular segment portion, the circular opening head portion of the sipe in the same block in the pattern unit P is located on one straight line, that is, as shown in fig. 2, the circular opening head portion of the sipe 21 of the middle block 2 is located on one straight line L5, the circular opening head portion of the sipe 311 of the side first block 31 is located on one straight line L6, and the circular opening head portion of the sipe 321 of the side second block 32 is located on one straight line L7. Thus, when the tire is decelerated in a straight line instantaneously, the central area of the pattern unit P is strengthened by the superposition effect of the forces of the circular opening head parts of the sipes, the compression rigidity of the tread pattern of the snow tire is ensured, and the durability of the tire is ensured.

The diameter of the circular opening head is 3 times the width of the section part. Taking the middle block 2 as an example, the sipe 21 on the middle block 2 as shown in fig. 4 has a circular open head portion 211, a segment portion 212, and a segment portion 213. The round opening head 211 is round instead of oval or other shapes, so that the stress of each angle of the round opening head 211 in the snow cutting process is uniform, and the pattern rigidity of the pattern unit P in the snow cutting process can be ensured. The diameter D of the circular open head 211 of the sipe 21 in the middle block 2 is 3 times the segment width D1, i.e., D is 3D 1. The sipes 311, 321 on the side first blocks 31 and the side second blocks 32 are arranged in the same manner as the sipe 21 of the middle block 2. The compression rigidity of the pattern unit P with the shovel-shaped outline is strengthened through the force superposition effect of the round opening head in snow pushing stress, and the durability of the tire is improved. If there are a plurality of openings, the circular head of the sipe moves from the opening to the section of the sipe head, which is not good for the durability of the tire.

The circular opening head faces the central region of the pattern unit P, and the segment portion connecting the circular opening heads is located on the circumferential front side of the sequentially adjacent segment portions, as shown in fig. 2, that is:

the circular opening head portion 211 of the sipe 21 on the middle block 2 faces the axial outer side of the middle block 2, the section portion 212 and the section portion 213 of the sipe 21 on the middle block 2 extend to the axial inner side of the middle block 2, the section portion 212 has one end connected to the circular opening head portion 211 and one end connected to the section portion 213, the section portion 213 has one end communicated with the longitudinal main groove 20, and the section portion 212 is located at the circumferential front side of the section portion 213.

The sipe 311 of the side first block 31 has a circular open head portion 311a, a non-circular block portion 311b, and a non-circular block portion 311c, the circular open head portion 311a faces the axially inner side of the side first block 31, the block portion 311b has one end connected to the circular open head portion 311a and one end connected to the block portion 311c, the block portion 311c extends axially outward of the side first block 31, and the block portion 311b is located on the circumferentially front side of the block portion 311 c.

The sipe 321 on the side second block 32 has a circular opening head portion 321a, a non-circular section portion 321b and a non-circular section portion 321c, the circular opening head portion 321a faces the axial inner side of the side second block 32, the section portion 321b has one end connected to the circular opening head portion 321a and one end connected to the section portion 321c, the section portion 321c extends to the axial outer side of the side second block 32, and the section portion 321b is located on the circumferential front side of the section portion 321 c; the rigidity of the pattern unit P with the shovel-shaped outline can be further enhanced by the arrangement, the overall rigidity of the pattern block P is enhanced while the snow gripping performance of the tire is improved, and the durability of the tire is ensured.

Example two

Fig. 5 is a schematic view of a sipe structure of a tire tread pattern according to a second embodiment of the present invention, the tire tread pattern according to the second embodiment is the same as the tire tread pattern according to the first embodiment shown in fig. 1, and the difference is that the sipe on the block contact surface in the pattern unit of the tread is different, and is not repeated in the second embodiment. The sipe of the second embodiment shown in fig. 5 differs from the sipe of the first embodiment shown in fig. 4 in that:

the sipe on the block of a pattern unit (P) includes an opening head portion having a circular shape and three segment portions. As shown in fig. 5, the sipe 21 ' on the middle block 2 has a circular opening head portion 211 ', a non-circular block portion 212 ', a non-circular block portion 213 ', and a non-circular block portion 214 '. The circular opening head portion 211 'faces the axially outer side of the intermediate block 2, the segment portion 212', the segment portion 213 ', and the segment portion 214' extend toward the axially inner side of the intermediate block 2, the sipe 21 'is connected in order from the axially inner side to the axially outer side of the intermediate block 2 to the circular opening head portion 211', the segment portion 212 ', the segment portion 213', and the segment portion 214 ', the segment portion 214' communicating at one end with the longitudinal main groove 20, the segment portion 212 'being located on the circumferentially front side of the segment portion 213', the segment portion 213 'being located on the circumferentially front side of the segment portion 214'. The sipes of the side first blocks 31 and the side second blocks 32 are arranged in the same pattern as the sipe 21' of the middle block 2, except that the circular opening head portion of the sipe extends axially inward of the corresponding block of the side block group and the segment portion extends axially outward of the corresponding block of the side block group. Thus, the central area of the pattern unit P of the tread is strengthened through the superposition effect of the force applied to snow shearing, the rigidity of the pattern unit P is ensured, and the durability of the tire is improved.

EXAMPLE III

Fig. 6 is a schematic view of a tread pattern structure of a tire according to a third embodiment of the present invention, and the rest is the same as the first embodiment. The tread pattern of the third embodiment shown in fig. 6 differs from the tread pattern of the first embodiment shown in fig. 1 in that:

the center pattern strip 1 is replaced by a center pattern group 4, the center pattern group 4 is formed by center pattern blocks 41 arranged at intervals along a tire center plane C.L, the center pattern blocks 41 have a shovel-shaped profile, the axial front side width of the center pattern blocks 41 is smaller than the axial rear side width of the center pattern blocks 41, the circumferential edges of the center pattern blocks 41 are provided with rib sipes 411, and one ends of the rib sipes 411 are communicated with the longitudinal main grooves 20. The center of the center block 41 is provided with a triangular pyramid-shaped groove 412, and a ground contact edge 412a of the triangular pyramid-shaped groove 412 is arranged in parallel with the circumferential edge profile of the center block 41. The arrangement can improve the durability of the snow tire and simultaneously give consideration to the gripping performance of the snow tire.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A snow tire comprising a tire body including a tread arranged with a plurality of pattern elements and a central pattern strip, characterized in that:

the pattern unit is provided with a shovel-shaped outline, the axial outline of the pattern unit is provided with an arc curve, and the center of the arc curve is positioned in the tread area;

2. A snow tire according to claim 1, wherein the end points of the circular arc curves of the axial profiles of the pattern units have a distance in the tire circumferential direction, and the pitch of the end points on both sides of the circular arc curves of the axial profiles of the pattern units in the circumferential direction is 13% to 40% of the circumferential length between adjacent pattern units.

3. A snow tire according to claim 1, wherein the circular open head portion of the upper intermediate block sipe is directed axially outwardly of the intermediate block, and the segment portion of the upper intermediate block sipe extends axially inwardly of the intermediate block;

4. A snow tire according to claim 1, wherein the blocks in the pattern unit are provided with not less than 3 sipes, and the diameter of the circular opening head portion is not less than 3 times the width of the segment portion.

5. A snow tire according to claim 1, wherein the sipe has not less than 2 segments in the block land surface of the pattern unit.

6. A snow tyre as claimed in claim 1, characterized in that the circumferential edge profile elements of the central tread band comprise a first circumferential edge profile connecting the rear sides of the incisions and a second circumferential edge profile connecting the front sides of the incisions; the second circumferential edge profile is provided with a plurality of bar-shaped sipes.

7. A snow tire as in claim 1, wherein said central tread band has a plurality of triangular pyramidal grooves spaced along a central plane of the tire.

8. A snow tire according to claim 6, wherein said central tread band is provided with a plurality of triangular pyramid shaped grooves spaced along the central plane of the tire, the ground engaging edges of said triangular pyramid shaped grooves being disposed parallel to the second circumferential edge profile of the central tread band.

9. The snow tire of claim 8, wherein the first circumferential edge profile of the center tread strip forms a greater angle with the circumferential direction of the tire than the second circumferential edge profile forms with the circumferential direction of the tire.

10. A snow tire according to claim 1, wherein said center rib strip is replaced by a center block group formed of center blocks arranged at intervals along the center plane of the tire, said center blocks having a spade-like profile, the axial forward side width of said center blocks being not greater than the axial rearward side width of the center blocks, the circumferential edge profile of said center blocks being provided with a plurality of sipes.