Tire pattern and middle and short distance tire

Abstract

The utility model provides a tread pattern and a middle and short distance tire, which belong to the technical field of tires, and the tread pattern comprises a plurality of longitudinal pattern grooves extending along the circumferential direction of a tread and a plurality of circumferential pattern blocks divided by the longitudinal pattern grooves, the circumferential pattern blocks comprise shoulder pattern blocks located on the tire shoulders on the two sides and middle pattern blocks located between the adjacent longitudinal pattern grooves, the shoulder pattern blocks and the middle pattern blocks are arranged in a staggered mode, the staggered quantity between the adjacent shoulder pattern blocks and middle pattern blocks is 2 / 3 pattern pitch, and the staggered quantity between the adjacent middle pattern blocks is 1 / 2 pattern pitch. The tire pattern solves the technical problems that when the running speed of an existing middle-short-distance tire is increased, the operation stability is poor, sideslip is prone to occurring, eccentric wear occurs to pattern blocks due to uneven stress, and the pattern blocks are bitten and fall off due to large movement deformation of the pattern blocks during running under the high-load condition. The tire disclosed by the utility model has good operation stability and wear resistance when running on a complex road surface.

Description

Technical Field

[0001] The utility model belongs to the technical field of tires, and in particular relates to a tire pattern and a medium- and short-distance tire. Background Art

[0002] As road conditions improve, vehicle speeds continue to increase. Short- and medium-distance tires are used on both paved and unpaved roads, creating a complex operating environment. When driving on paved roads, they require excellent high-speed performance, exceptional handling stability, and a high mileage. When driving on unpaved roads, they require excellent road adhesion and traction, as well as good tread self-cleaning properties and wear resistance.

[0003] Currently, the tread pattern of short- and medium-distance tires generally adopts a block-like design with longitudinal and transverse grooves, where transverse grooves divide the longitudinal grooves into independent blocks. At higher speeds, these short- and medium-distance tires suffer from poor handling stability, especially when traveling on uneven surfaces, where lateral forces can easily cause the tire to slip. Furthermore, during driving, the edges of the blocks corresponding to the transverse grooves are subject to greater forces when in contact with the ground, resulting in uneven wear. If the tire is driven under high load, the blocks can experience significant movement and deformation, leading to block damage and loss, compromising driving safety.

[0004] Based on this, the utility model provides a novel short-distance tire tread structure. Utility Model Content

[0005] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0006] The utility model proposes a tire pattern and a medium- and short-distance tire, which solves the technical problems of existing medium- and short-distance tires, such as poor handling stability and easy side slip when the driving speed increases, uneven wear of pattern blocks due to uneven force, and large movement and deformation of pattern blocks due to driving under high load conditions, which leads to gnawing and falling of blocks. The medium- and short-distance tire of the utility model has good handling stability and lateral stability when driving on complex roads, balances the rigidity of the crown center and shoulder pattern blocks, improves wear resistance, and can prevent deformity or abnormal wear.

[0007] On one hand, the utility model discloses a tire pattern, comprising a plurality of longitudinal grooves extending circumferentially along the tread and a plurality of circumferential pattern blocks divided by the longitudinal grooves, wherein the circumferential pattern blocks include shoulder pattern blocks located on both shoulders and middle pattern blocks located between adjacent longitudinal grooves, the shoulder pattern blocks and the middle pattern blocks are staggered, the staggered amount between adjacent shoulder pattern blocks and middle pattern blocks is 2 / 3 of the pattern pitch, and the staggered amount between adjacent middle pattern blocks is 1 / 2 of the pattern pitch.

[0008] In some embodiments, the area ratio of the middle pattern block to the shoulder pattern block is 1:(1-1.4).

[0009] In some embodiments, the inner angles of the shoulder pattern blocks and the middle pattern blocks are both ≥90°.

[0010] In some embodiments, a plurality of middle steel sheets are arranged at intervals on the middle pattern block, the middle steel sheets are in a broken line structure, and the opening directions of the middle steel sheets are all toward the sidewalls.

[0011] In some embodiments, the longitudinal groove is a zigzag groove, and a first transverse groove extends from a zigzag inflection point.

[0012] In some embodiments, second transverse grooves opposite to adjacent first transverse grooves are provided on both side shoulders, and a width ratio of the second transverse grooves to the first transverse grooves is 1:(1.5-2).

[0013] In some embodiments, the total area of ​​the longitudinal grooves, the first transverse grooves, and the second transverse grooves accounts for 20% to 30% of the tire tread area.

[0014] In some embodiments, the longitudinal groove is a double-layer groove structure, wherein the angle of the upper groove wall is 20° to 70°, the width of the lower groove is ≥3mm, and the ratio of the upper groove depth to the lower groove depth is (2 to 5):1.

[0015] In some embodiments, the longitudinal grooves include a central longitudinal groove located on the centerline of the tread and shoulder longitudinal grooves located on both sides of the central longitudinal groove, the central longitudinal groove and the shoulder longitudinal groove have opposite bending directions, and the curvature of the shoulder longitudinal groove is ≥ the curvature of the central longitudinal groove.

[0016] Another aspect of the present invention provides a short- to medium-distance tire, the tire tread of which is provided with the above-mentioned tire pattern.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The shoulder pattern blocks and the middle pattern blocks of the tire pattern of the utility model are staggered, ensuring that the contact area at each circumferential angle is the same when the tire crown touches the ground, the circumferential contact pressure is uniform, and there will be no abnormal circumferential wear problem.

[0019] (2) The tire pattern of the utility model is beneficial to balancing the rigidity of the crown center and shoulder pattern blocks by limiting the area ratio of the pattern blocks, avoiding the movement of the shoulder pattern blocks when the crown is subjected to lateral force, and preventing the shoulder pattern blocks from being too large, resulting in excessively high tire shoulder running temperature.

[0020] (3) The inner angle of the tread blocks of the tire pattern of the present invention is not less than 90°, which can prevent the tread block angle from being too small, causing the tread block to deform and excessively rub against the ground when it is subjected to shear force when touching the ground, resulting in abnormal wear.

[0021] (4) The utility model provides a plurality of middle steel sheets on the middle tread blocks of the tire pattern, which increases the adhesion of the tread blocks to the ground and improves the wet grip of the tire.

[0022] (5) The longitudinal grooves of the tire pattern of the present invention are of a broken line structure, and a first transverse groove extends from the broken line inflection point, which can ensure that the tire still has good handling stability under complex road conditions and high driving speeds, and has good lateral stability when driving on uneven and complex roads, so that the tire can increase its grip and driving force when driving on unpaved roads, while improving the self-cleaning performance of the pattern.

[0023] (6) The bending directions of adjacent longitudinal grooves of the tire pattern of the present invention are opposite, which can prevent the problem of large deformation of the shoulder pattern blocks caused by reduced rigidity of the tire shoulder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0025] Figure 1 A schematic diagram of the structure of the tire pattern provided by an embodiment of the utility model;

[0026] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0027] In the attached figure: 1. shoulder pattern block, 2. shoulder longitudinal pattern groove, 3. middle pattern block, 4. middle longitudinal pattern groove, 5. first transverse pattern groove, 6. second transverse pattern groove, 7. middle steel sheet. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", and "third" may explicitly or implicitly include one or more of such features. The term "longitudinal" refers to the direction in which the tire rolls; the term "transverse" refers to the direction perpendicular to the mid-plane of the tire.

[0030] The embodiment of the utility model provides a tire pattern and a medium- and short-distance tire, which has good handling stability and lateral stability when driving on complex roads, balances the rigidity of the crown center and shoulder pattern blocks, improves wear resistance, and can prevent deformity or abnormal wear. Figure 1 Schematic diagram of the tire pattern according to the embodiment of the present invention. Figure 1 As shown, the tire pattern includes multiple longitudinal grooves extending along the circumference of the tread and multiple circumferential blocks divided by the longitudinal grooves. The circumferential blocks are all circumferentially continuous structures, with stronger rigidity and better handling stability. Under the action of longitudinal and radial forces, the ground contact deformation is small, and it is not easy to have uneven wear problems, which is beneficial to improving the overall wear resistance of the tire.

[0031] The circumferential tread blocks of the tire pattern of this embodiment include shoulder blocks 1 located on both shoulders and central blocks 3 located between adjacent longitudinal grooves. The shoulder blocks 1 and central blocks 3 are staggered, ensuring that the tire crown contacts the ground with equal contact area at all circumferential angles, resulting in uniform circumferential contact pressure and preventing abnormal circumferential wear. In a preferred embodiment, the offset between adjacent shoulder blocks 1 and central blocks 3 is 2 / 3 of the tread pitch, and the offset between adjacent central blocks 3 is 1 / 2 of the tread pitch.

[0032] To balance the rigidity of the crown center and shoulder blocks 1, prevent shoulder blocks 1 from moving when the crown is subjected to lateral forces, and prevent excessive shoulder temperatures due to overly large shoulder blocks 1, the area ratio of the center blocks 1 to the shoulder blocks 3 in the tire pattern of this embodiment of the utility model is 1:(1-1.4). To prevent the block angles from being too small, which could lead to deformation and excessive friction with the ground when the tire is subjected to shear forces, resulting in abnormal wear, the internal angles of the shoulder blocks 1 and center blocks 3 are both ≥90°.

[0033] In the embodiment of the utility model, a plurality of middle steel sheets 7 are arranged at intervals on the middle tread blocks 3 of the tire pattern. The middle steel sheets 7 are in a broken line structure, and the opening directions are all toward the sidewalls, that is, the opening directions of the middle steel sheets 7 on adjacent middle tread blocks 3 are opposite. The above structural design increases the adhesion of the middle tread blocks 3 to the ground and improves the wet grip of the tire.

[0034] The tire pattern of this embodiment of the present invention adopts a hybrid groove design with primarily longitudinal grooves, supplemented by small transverse grooves at the zigzag locations of the longitudinal grooves. The tire pattern includes: multiple longitudinal grooves extending circumferentially along the tread. The longitudinal grooves are zigzag grooves, with first transverse grooves 5 extending from the zigzag inflection points. Second transverse grooves 6 are provided on both shoulders of the tire pattern of this embodiment of the present invention, opposite the adjacent first transverse grooves 5. The width ratio of the second transverse grooves 6 to the first transverse grooves 5 is 1:(1.5-2). This structural design facilitates heat dissipation from the shoulders during tire operation, avoiding the problem of shoulder voids caused by heat accumulation due to high stress and strain in the shoulders. In a preferred embodiment, the combined area of ​​the longitudinal grooves, first transverse grooves, and second transverse grooves of the tire pattern of this embodiment of the present invention accounts for 20% to 30% of the tire pattern area.

[0035] The tire pattern of the present invention can ensure good handling stability even when the road conditions are complex and the driving speed is high, and has good lateral stability when driving on uneven and complex roads through the arrangement of multiple longitudinal grooves. The transverse grooves can increase the tire's grip and driving force when driving on unpaved roads, while also improving the self-cleaning performance of the pattern. Figure 2As shown, the longitudinal grooves adopt a double-layer groove structure design, wherein the upper groove wall angle α is 20° to 70°, the lower groove width L is ≥ 3mm, and the ratio of the upper groove depth H1 to the lower groove depth H2 is (2 to 5):1. The double-layer groove design can prevent sand and stones from piercing the groove bottom and causing cracks. In a preferred embodiment, the longitudinal grooves include a central longitudinal groove 4 located at the centerline of the tread and shoulder longitudinal grooves 2 located on both sides of the central longitudinal groove 4. The central longitudinal groove 4 and the shoulder longitudinal groove 2 have opposite curvature directions. To prevent the problem of large deformation of the shoulder block 1 due to reduced rigidity of the tire shoulder, the curvature of the shoulder longitudinal groove 2 is ≥ the curvature of the central longitudinal groove 4.

[0036] The embodiment of the present utility model further provides a medium- and short-distance tire, on which the above-mentioned tire pattern is arranged, and which has good handling stability and wear resistance when traveling on complex roads.

[0037] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. A tire pattern, characterized by: The tire comprises a plurality of longitudinal grooves extending circumferentially along the tread and a plurality of circumferential pattern blocks divided by the longitudinal grooves, wherein the circumferential pattern blocks comprise shoulder pattern blocks located on both shoulders and middle pattern blocks located between adjacent longitudinal grooves, the shoulder pattern blocks and the middle pattern blocks are staggered, the staggered amount between adjacent shoulder pattern blocks and middle pattern blocks is 2 / 3 of the pattern pitch, and the staggered amount between adjacent middle pattern blocks is 1 / 2 of the pattern pitch.

2. The tire pattern according to claim 1, characterized in that: The area ratio of the middle pattern block to the shoulder pattern block is 1:(1-1.4).

3. The tire pattern according to claim 1, wherein: The inner angles of the shoulder pattern blocks and the middle pattern blocks are both ≥90°.

4. The tire pattern according to claim 1, wherein: A plurality of middle steel sheets are arranged at intervals on the middle pattern block. The middle steel sheets are in a broken line structure, and the opening directions of the middle steel sheets are all toward the sidewalls.

5. The tire pattern according to claim 1, characterized in that: The longitudinal groove is a zigzag groove, and a first transverse groove extends from the zigzag inflection point.

6. The tire pattern according to claim 5, characterized in that: Second transverse grooves opposite to adjacent first transverse grooves are provided on both shoulder portions, and a width ratio of the second transverse grooves to the first transverse grooves is 1:(1.5-2).

7. The tire pattern according to claim 6, characterized in that: The total area of ​​the longitudinal grooves, the first transverse grooves and the second transverse grooves accounts for 20% to 30% of the tire tread area.

8. The tire pattern according to claim 5, characterized in that: The longitudinal groove is a double-layer groove structure, wherein the angle of the upper groove wall is 20°~70°, the width of the lower groove is ≥3mm, and the ratio of the upper groove depth to the lower groove depth is (2~5):

1.

9. The tire pattern according to claim 5, characterized in that: The longitudinal grooves include a central longitudinal groove located on the center line of the tread and shoulder longitudinal grooves located on both sides of the central longitudinal groove. The central longitudinal groove has an opposite bending direction to the shoulder longitudinal groove, and the curvature of the shoulder longitudinal groove is greater than or equal to the curvature of the central longitudinal groove.

10. A short-distance tire, characterized by: The tire tread is provided with the tire pattern according to any one of claims 1 to 9.

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