Tire contour structure and tire

Abstract

The utility model provides a tire contour structure and a tire, which belong to the technical field of tires and comprise a tire crown, a tire shoulder and a tire sidewall, the tire crown comprises a tire crown outer contour curve and a tire crown inner contour curve corresponding to the tire crown outer contour curve; the bottom curve of a shoulder transverse groove formed in the tire shoulder comprises a first curve, a first straight line and a second curve which are connected in sequence, the first curve is close to one side of the tire crown, and the distance between the first curve and the inner contour curve of the tire crown is 1.5-2.5 mm; the second curve is close to one side of the tire side, the distance from the second curve to the inner contour curve of the tire crown is 2.3-4.0 mm, and the two ends of the second curve are tangent to the first straight line and the upper tire side arc of the tire side respectively. The tire contour structure disclosed by the utility model is beneficial to reducing the thickness of the shoulder of the tread, enhancing the rigidity of the shoulder, reducing the rolling resistance of the tire and improving the high-speed performance and the control stability of the tire.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tire technical field especially relates to a tire contour structure and tire. BACKGROUND

[0002] With the rapid development of domestic automobile market, especially the further improvement of electric vehicle market penetration rate, the cost and performance requirements of automobile to tire are higher and higher. As the key component of automobile and ground contact, the performance of tire directly affects the performance of vehicle. Especially in the field of electric vehicle, due to the large weight of vehicle body and the high requirement of endurance, higher requirements are put forward for the performance indexes such as the controllability, rolling resistance and wear resistance of tire.

[0003] In order to improve the performance of tire, the material and structure design of tire are usually improved. However, the traditional design improves the structure of tire, and simple tire pattern or groove design is usually adopted, which is difficult to meet the performance requirements of reducing rolling resistance and improving the controllability of tire.

[0004] Therefore, how to provide a tire contour structure, reduce the rolling resistance of tire and improve the controllability of tire at the same time becomes a technical problem to be solved. SUMMARY

[0005] The details of one or more embodiments of the utility model are proposed in the following drawings and description, so that other features, objects and advantages of the application are more concise and easy to understand.

[0006] The utility model discloses a tire contour structure and tire, solve the technical problem that the structure design of existing tire is difficult to meet the performance requirements of reducing rolling resistance and improving the controllability of tire, have the characteristics of reducing the rolling resistance of tire, improve the controllability of tire.

[0007] The utility model discloses a kind of tire contour structure, including crown, shoulder and side wall;Crown includes crown outer contour curve and the crown inner contour curve corresponding with crown outer contour curve;The bottom curve of shoulder setting shoulder transverse groove includes sequentially connected first curve, first straight line and second curve, wherein, first curve is close to the side of crown, the distance of first curve to crown inner contour curve is 1.5-2.5mm;Second curve is close to the side of side wall, the distance of second curve to crown inner contour curve is 2.3-4.0mm, and the both ends of second curve are respectively tangent with first straight line, the upper side wall arc of side wall.

[0008] In some embodiments, the distance h of the endpoint of the beginning of shoulder to the highest point of crown center portion satisfies h=NSW× (2%-4%), wherein NSW is the nominal section width of tire.

[0009] In some embodiments, the crown profile curve comprises, in order from the crown centerline to the shoulder start endpoint, a first crown arc, a second crown arc, and a third crown arc, wherein the first crown arc has a radius of curvature TR1 that satisfies TR1 = NSW x (420%-460%), the second crown arc has a radius of curvature TR2 that satisfies TR2 = NSW x (290%-330%), and the third crown arc has a radius of curvature TR3 that satisfies TR3 = NSW x (55%-95%), where NSW represents the nominal section width of the tire.

[0010] In some embodiments, the crown profile curve comprises, in order from the crown centerline to the shoulder start endpoint, a first crown arc, a second crown arc, and a third crown arc, wherein the first crown arc has a length horizontal distance BP1 that satisfies BP1 = 1 / 2 TDW x (30%-35%), the second crown arc has a length horizontal distance BP2 that satisfies BP2 = 1 / 2 TDW x (30%-35%), and the third crown arc has a length horizontal distance BP3 that satisfies BP3 = 1 / 2 TDW x (35%-40%), where TDW represents the width of the running surface of the tire.

[0011] In some embodiments, the crown profile curve comprises, in order from the crown centerline to the shoulder start endpoint, a first crown arc, a second crown arc, and a third crown arc, wherein the first crown arc has a length horizontal distance BP1 that satisfies BP1 = 1 / 2 TDW x (30%-35%), the second crown arc has a length horizontal distance BP2 that satisfies BP2 = 1 / 2 TDW x (30%-35%), and the third crown arc has a length horizontal distance BP3 that satisfies BP3 = 1 / 2 TDW x (35%-40%), where TDW represents the width of the running surface of the tire.

[0012] In some embodiments, the crown profile curve comprises, in order from the crown centerline to the shoulder start endpoint, a first crown arc, a second crown arc, and a third crown arc, wherein the first crown arc has a length horizontal distance BP1 that satisfies BP1 = 1 / 2 TDW x (30%-35%), the second crown arc has a length horizontal distance BP2 that satisfies BP2 = 1 / 2 TDW x (30%-35%), and the third crown arc has a length horizontal distance BP3 that satisfies BP3 = 1 / 2 TDW x (35%-40%), where TDW represents the width of the running surface of the tire.

[0013] In some embodiments, the sidewall comprises an upper sidewall arc at an upper portion of the sidewall and a lower sidewall arc at a lower portion of the sidewall, wherein the upper sidewall arc is an arc of a circle having a center on a line along which the section width of the tire lies and passing through the shoulder start endpoint and the widest point of the section width of the tire, and the lower sidewall arc is an arc of a circle having a center on the line along which the section width of the tire lies and passing through the widest point B of the section width of the tire and tangent to the curve at the bead.

[0014] In another aspect, this utility model also provides a tire having any of the above-described tire profile structures.

[0015] In some embodiments, the tire crown center area is provided with a central longitudinal groove, the inner starting point of which is located at 13%-17% of half of the tire tread width TDW; the tire shoulder is provided with a shoulder longitudinal groove, the inner starting point of which is located at 56%-68% of half of the tire tread width TDW.

[0016] In some embodiments, the depth of the shoulder longitudinal groove is 70%-95% of the depth of the central longitudinal groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) The tire profile structure of this utility model, through the structural setting of the bottom curve of the shoulder transverse groove, is conducive to reducing the thickness of the tread shoulder, enhancing the shoulder rigidity, reducing the rolling resistance of the tire, improving the high-speed performance and handling stability of the tire, and can also avoid the problem of exposed lines at the bottom of the shoulder transverse groove due to the excessive depth of the shoulder transverse groove during the tire production process.

[0019] (2) The tire profile structure of this utility model increases the radius of curvature of the tire tread by adjusting the distance from the end point of the tire shoulder to the highest point of the center of the tire crown, and in conjunction with the three-segment arc of the outer profile curve of the tire crown, thereby improving the rigidity of the tire tread and avoiding the problem of tire bending and partial failure to touch the ground when the tire turns sharply. This improves the tire's handling, braking and wear performance and reduces the tire's rolling resistance.

[0020] (3) The tire profile structure of this utility model is designed with the sidewall arc. By increasing the curvature radius of the upper sidewall arc, the tread deformation is transferred to the upper sidewall area, avoiding the problem of tread bending when the tire turns sharply. By reducing the curvature radius of the lower sidewall arc, the deformation at the tire tread can be reduced from being transferred to the upper sidewall area, thereby reducing heat generation and lowering tire rolling resistance. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with their descriptions, serve to explain the present invention and do not constitute an undue limitation thereof. Wherein:

[0022] Figure 1 This is a schematic diagram of the tire profile structure provided in an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 A magnified view of a portion of point C in the middle;

[0024] In the attached diagram: 1. Outer contour curve of the tire crown, 2. Inner contour curve of the tire crown, 3. Bottom curve of the shoulder transverse groove, 31. First curve, 32. First straight line, 33. Second curve, 4. Upper sidewall arc, 5. Lower sidewall arc, 6. Curve at the tread.

[0025] A: End point of the starting point of the fetal shoulder;

[0026] B: Widest point of the tire section width;

[0027] h: The distance from the end point of the shoulder to the highest point of the center part of the crown;

[0028] SW: Tire section width;

[0029] TDW: Tire tread width;

[0030] TR1: Radius of curvature of the first crown arc;

[0031] TR2: Radius of curvature of the second crown arc;

[0032] TR3: Radius of curvature of the third gestational crown;

[0033] TR4: Radius of curvature of the fourth gestational crown;

[0034] TR5: Radius of curvature of the fifth gestational crown;

[0035] TR6: Radius of the sixth gestational crown curvature;

[0036] BP1: Horizontal distance of the first tire crown arc length;

[0037] BP2: Horizontal distance of the second crown arc length;

[0038] BP3: Horizontal distance of the third gestational crown arc length. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "upper," "lower," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," and "third" may explicitly or implicitly include one or more of that feature. The term "longitudinal" refers to the direction in which the tire rolls; the term "lateral" refers to the direction perpendicular to the mid-surface of the tire.

[0041] This utility model embodiment provides a tire profile structure and a tire. Figure 1 This is a schematic diagram of the tire profile structure according to an embodiment of the present invention. (Reference) Figure 1 As shown, the tire profile structure includes a crown, a shoulder, and a sidewall. The crown includes an outer crown profile curve 1 and an inner crown profile curve 2 corresponding to the outer crown profile curve 1. The bottom curve 3 of the shoulder lateral groove includes a first curve 31, a first straight line 32, and a second curve 33 connected in sequence. The first curve 31 is closer to the crown side, and the distance from the first curve 31 to the inner crown profile curve is 1.5-2.5 mm. The second curve 33 is closer to the sidewall side, and the distance from the second curve 33 to the inner crown profile curve is 2.3-4.0 mm. The two ends of the second curve 33 are tangent to the first straight line 32 and the upper sidewall arc 4 of the sidewall, respectively. The radius of curvature of the second curve 33 is 5-15 mm. This structural design helps to reduce the thickness of the shoulder, enhance shoulder rigidity, reduce tire rolling resistance, improve tire high-speed performance, and avoid the problem of exposed lines at the bottom of the shoulder lateral groove due to excessive depth during tire production.

[0042] In this invention, the distance h from the starting point A of the tire shoulder to the highest point of the center portion of the tire crown satisfies h = NSW × (2% - 4%), where NSW is the nominal section width of the tire. Compared with the traditional tire profile structure, this invention reduces the distance from the starting point A of the tire shoulder to the highest point of the center portion of the tire crown, which can increase the radius of curvature of the inner and outer profile curves and increase the rotation radius of the tire shoulder area. This results in less centrifugal force during tire operation, effectively reducing tire rolling resistance and improving the tire's high-speed performance.

[0043] The outer contour curve 1 of this utility model, from the center line of the tire crown to the starting point A of the tire shoulder, sequentially includes a first crown arc, a second crown arc, and a third crown arc. The radius of curvature TR1 of the first crown arc satisfies TR1 = NSW × (420% - 460%), the radius of curvature TR2 of the second crown arc satisfies TR2 = NSW × (290% - 330%), and the radius of curvature TR3 of the third crown arc satisfies TR3 = NSW × (55% - 95%). In the above formulas, NSW represents the nominal section width of the tire. The horizontal distance BP1 of the first crown arc length satisfies BP1 = 1 / 2 TDW × (30% - 35%), the horizontal distance BP2 of the second crown arc length satisfies BP2 = 1 / 2 TDW × (30% - 35%), and the horizontal distance BP3 of the third crown arc length satisfies BP3 = 1 / 2 TDW × (35% - 40%). In the above formulas, TDW represents the tire tread width. The design of the outer contour curve of the tire crown increases the curvature of the tire tread, which can improve the rigidity of the tire tread, avoid tread bending during sharp turns, prevent some areas from not touching the ground, and improve tire handling, braking and wear performance.

[0044] The inner contour curve 2 of the tire crown of this utility model includes a fourth crown arc, a fifth crown arc, and a sixth crown arc from the center line of the tire crown to the starting point A of the tire shoulder. The fourth crown arc corresponds to the first crown arc, and the radius of curvature TR4 of the fourth crown arc satisfies TR4 = NSW × (600% - 640%). The fifth crown arc corresponds to the second crown arc, and the radius of curvature TR5 of the fifth crown arc satisfies TR5 = NSW × (410% - 450%). The sixth crown arc corresponds to the third crown arc, and the radius of curvature TR6 of the sixth crown arc satisfies TR6 = NSW × (80% - 120%). In the above formulas, NSW represents the nominal section width of the tire. The horizontal distance BP4 of the fourth tire crown arc length satisfies BP4 = 1 / 2TDW × (30% - 35%), the horizontal distance BP5 of the fifth tire crown arc length satisfies BP5 = 1 / 2TDW × (30% - 35%), and the horizontal distance BP6 of the sixth tire crown arc length satisfies BP6 = 1 / 2TDW × (35% - 40%). In the above formulas, TDW represents the tire tread width. This utility model adjusts the radius of curvature of the inner contour curve of the tire crown. Compared with the inner contour curve of the tire crown in the traditional tire contour structure, it can increase the inner volume of the tire cavity and improve the tire's load-bearing capacity. The adjusted inner contour curve of the tire crown is straighter, which can reduce the curvature of the tire belt layer from the middle to the shoulder, making the belt layer straighter, which is beneficial to improving the tire's handling and grip during turns.

[0045] This utility model's tire sidewall includes an upper sidewall arc 4 located at the upper part of the sidewall and a lower sidewall arc 5 located at the lower part of the sidewall. The upper sidewall arc 4 is an arc centered on a straight line containing the tire's cross-sectional width, passing through the end point A at the beginning of the tire shoulder and the widest point B of the tire's cross-sectional width. The radius of curvature of the upper sidewall arc 4 is adjusted by changing the positions of the end point A at the beginning of the tire shoulder and the widest point B of the tire's cross-sectional width, resulting in a larger radius of curvature compared to traditional designs. Because the sidewall area is more prone to deformation, the upper part of the sidewall in this utility model has a larger profile compared to traditional designs, further transferring tread deformation to the upper sidewall area and preventing tread bending during sharp tire rotations. The lower tire sidewall arc 5 is tangent to the bead curve of the tire sidewall. The radius of curvature of the lower tire sidewall arc 5 is an arc centered on the straight line where the tire section width is located, passing through the widest point B of the tire section width and tangent to the bead curve 6. The radius of curvature of the lower tire sidewall arc 5 is adjusted by adjusting the radius of curvature of the widest point B of the tire section width and the bead curve 6. Compared with the traditional design curve, it has a smaller radius of curvature, which can reduce the transfer of deformation at the tire bead to the tire sidewall area, thereby reducing heat generation and reducing tire rolling resistance.

[0046] This utility model also provides a tire, including any of the tire profile structures described above. A central longitudinal groove is provided in the central area of ​​the tire crown, with the starting point of the inner side of the central longitudinal groove located at 13%-17% of half the tire's tread width (TDW). A shoulder longitudinal groove is provided in the tire shoulder, with the starting point of the inner side of the shoulder longitudinal groove located at 56%-68% of half the tire's tread width (TDW). The depth of the shoulder longitudinal groove is 70%-95% of the depth of the central longitudinal groove. Unlike traditional tires with uniform tread groove depth, the longitudinal grooves of this utility model employ a gradual depth design, with the depth gradually decreasing from the central longitudinal groove in the central area of ​​the tire crown to the shoulder longitudinal groove in the shoulder area. This reduces the weight of the tire tread area from the center to the shoulder, thus reducing the weight of the tire shoulder.

[0047] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A tire profile structure, characterized by: The tire crown, the tire shoulder and the tire side; The tire crown comprises a tire crown outer profile curve and a tire crown inner profile curve arranged correspondingly to the tire crown outer profile curve; The bottom curve of the shoulder transverse groove arranged at the tire shoulder comprises a first curve, a first straight line and a second curve connected in sequence, wherein the first curve is close to the tire crown, the distance from the first curve to the tire crown inner profile curve is 1.5-2.5 mm; the second curve is close to the tire side, the distance from the second curve to the tire crown inner profile curve is 2.3-4.0 mm, and the two ends of the second curve are tangent to the first straight line and the upper side arc of the tire side respectively.

2. Tyre profile structure according to claim 1, characterized in that: The distance h from the end point of the tire shoulder starting position to the highest point of the tire crown center part satisfies h = NSW × (2%-4%), wherein NSW is the nominal section width of the tire.

3. The tire profile structure of claim 1, wherein: The tire crown outer profile curve comprises a first tire crown arc, a second tire crown arc and a third tire crown arc in sequence from the tire crown center line to the end point of the tire shoulder starting position, wherein the curvature radius TR1 of the first tire crown arc satisfies TR1 = NSW × (420%-460%), the curvature radius TR2 of the second tire crown arc satisfies TR2 = NSW × (290%-330%), and the curvature radius TR3 of the third tire crown arc satisfies TR3 = NSW × (55%-95%), wherein NSW represents the nominal section width of the tire.

4. The tire profile structure of claim 1, wherein: The tire crown outer profile curve comprises a first tire crown arc, a second tire crown arc and a third tire crown arc in sequence from the tire crown center line to the end point of the tire shoulder starting position, wherein the length horizontal distance BP1 of the first tire crown arc satisfies BP1 = 1 / 2TDW × (30%-35%), the length horizontal distance BP2 of the second tire crown arc satisfies BP2 = 1 / 2TDW × (30%-35%), and the length horizontal distance BP3 of the third tire crown arc satisfies BP3 = 1 / 2TDW × (35%-40%), wherein TDW represents the width of the tire running surface.

5. The tire profile structure of claim 1, wherein: The tire crown inner profile curve comprises a fourth tire crown arc, a fifth tire crown arc and a sixth tire crown arc in sequence from the tire crown center line to the end point of the tire shoulder starting position, wherein the curvature radius TR4 of the fourth tire crown arc satisfies TR4 = NSW × (600%-640%), the curvature radius TR5 of the fifth tire crown arc satisfies TR5 = NSW × (410%-450%), and the curvature radius TR6 of the sixth tire crown arc satisfies TR6 = NSW × (80%-120%), wherein NSW represents the nominal section width of the tire.

6. The tire profile structure of claim 1, wherein: The tire crown inner profile curve comprises a fourth tire crown arc, a fifth tire crown arc and a sixth tire crown arc in sequence from the tire crown center line to the end point of the tire shoulder starting position, wherein the length horizontal distance BP4 of the fourth tire crown arc satisfies BP4 = 1 / 2TDW × (30%-35%), the length horizontal distance BP5 of the fifth tire crown arc satisfies BP5 = 1 / 2TDW × (30%-35%), and the length horizontal distance BP6 of the sixth tire crown arc satisfies BP6 = 1 / 2TDW × (35%-40%), wherein TDW represents the width of the tire running surface.

7. The tire profile structure of claim 1, wherein: The tire side includes an upper tire side arc at an upper portion of the tire side and a lower tire side arc at a lower portion of the tire side, wherein the upper tire side arc is an arc of a circle with a center on a straight line where a tire section width is located, and passing through an end point of a tire shoulder starting point and a point of maximum tire section width, and the lower tire side arc is an arc of a circle with a center on the straight line where the tire section width is located, and passing through the point of maximum tire section width B and tangent to a curve at a bead.

8. A tire characterized by: A tire profile structure according to any one of claims 1-7.

9. Tyre according to Claim 8, characterized in that: The tire crown central region is provided with a middle longitudinal groove, and an inside starting point of the middle longitudinal groove is located at 13-17% of a half of a tire running surface width TDW. The tire shoulder is provided with a shoulder longitudinal groove, and an inside starting point of the shoulder longitudinal groove is located at 56-68% of a half of the tire running surface width TDW.

10. Tyre according to Claim 9, characterized in that: The depth of the shoulder longitudinal groove is 70-95% of the depth of the middle longitudinal groove.

Images