CN107878121B

CN107878121B - Pneumatic tire

Info

Publication number: CN107878121B
Application number: CN201711330548.2A
Authority: CN
Inventors: 罗才仁
Original assignee: Cheng Shin Tire and Rubber China Co Ltd
Current assignee: Cheng Shin Tire and Rubber China Co Ltd
Priority date: 2017-12-13
Filing date: 2017-12-13
Publication date: 2024-02-02
Anticipated expiration: 2037-12-13
Also published as: CN107878121A

Abstract

The invention discloses a pneumatic tire, which comprises a tread and tire lips positioned on two sides of the tread, wherein a tire shoulder, a tire side and a tire rim protecting part are sequentially connected between the tread and the tire lips from the tread to the tire lips, the axis of the pneumatic tire and a plane determined by the diameter of the axis of the pneumatic tire are taken as cross sections, the outer contour line of the cross section of the tire side and the outer contour line of the cross section of the tire rim protecting part are concentric arcs, the center of the arc is positioned on the inner side of the pneumatic tire, and the curvature radius of the outer contour line of the cross section of the tire side is equal to the curvature radius of the outer contour line of the cross section of the tire rim protecting part. The lateral part of the pneumatic tire has stronger shock resistance and better shock absorption effect, and can correspondingly improve the driving comfort of the vehicle.

Description

Pneumatic tire

Technical Field

The invention relates to the technical field of tire processing and shaping, in particular to a pneumatic tire.

Background

Pneumatic tires are the most commonly used type of tire today, the performance of which determines the overall ride quality and handling performance of the vehicle.

Currently available pneumatic tires, particularly low aspect ratio tires, generally suffer from the following problems due to the limited structure at their sidewalls and rims: (1) the side part of the tire has poor impact resistance and is easy to generate internal deformation, so that the service life of the tire is influenced; (2) the low section height results in poor vibration damping and absorbing capacity, which results in poor driving comfort. These not only restrict the use effect of the pneumatic tire, but also adversely affect the overall performance of the vehicle.

Therefore, how to improve the side impact resistance of a pneumatic tire and improve the driving comfort thereof is an important technical problem that a person skilled in the art needs to solve at present.

Disclosure of Invention

The purpose of the present invention is to provide a pneumatic tire which has a high lateral impact resistance and which has a high running comfort.

In order to solve the technical problems, the invention provides a pneumatic tire, which comprises a tread and tire lips positioned on two sides of the tread, wherein a tire shoulder, a tire side and a tire rim protecting part are sequentially connected between the tread and the tire lips from the tread to the tire lips, a plane determined by the axis of the pneumatic tire and the diameter of the axis is taken as a cross section, the outer contour line of the cross section of the tire side and the outer contour line of the cross section of the tire rim protecting part are concentric arcs, the center of the arc is positioned on the inner side of the pneumatic tire, and the curvature radius of the outer contour line of the cross section of the tire side is equal to the curvature radius of the outer contour line of the cross section of the tire rim protecting part.

Preferably, the inner contour line of the section of the sidewall and the inner contour line of the section of the rim protection part are concentric arcs, the center of the arc is positioned at the inner side of the pneumatic tire, and the curvature radius of the inner contour line of the section of the sidewall is equal to the curvature radius of the inner contour line of the section of the rim protection part.

Preferably, the distance between the apex of the outer contour line of the whole section of the sidewall and the rim protection portion and the line between the actual contact end point of the tread in the axial direction of the pneumatic tire and the apex of the outer contour line of the section of the rim protection portion is 2mm to 6mm.

Preferably, a distance between an apex of a cross-sectional outer contour line of the rim protector and an intersection point of both end tangents of the cross-sectional outer contour line of the bead is 25mm to 35mm in an axial direction of the pneumatic tire.

Preferably, the shoulder, the sidewall and the rim protector profile are of unitary construction.

Preferably, the pneumatic tire is a rubber article.

Compared with the background art, the cross section outline of the side wall and the rim protection part of the pneumatic tire provided by the invention form a concentric arc structure, and the two have equal curvature radiuses, so that the side wall and the rim protection part are mutually matched to form an outer convex integrated structure, the side wall and the rim protection part can generate linkage deformation when being impacted by the structure, the side shock absorption effect of the whole pneumatic tire is effectively improved, the overall shock resistance and the comfort of the pneumatic tire are obviously improved, and the driving comfort of a vehicle is correspondingly improved.

In another preferred aspect of the present invention, the inner contour line of the cross section of the sidewall and the inner contour line of the cross section of the rim protecting portion are concentric arcs, the center of the arc is located inside the pneumatic tire, and the radius of curvature of the inner contour line of the cross section of the sidewall is equal to the radius of curvature of the inner contour line of the cross section of the rim protecting portion. On the basis that the outer contour lines of the sections of the tire side and the rim protection part form concentric arcs with the same curvature radius, the inner contour lines of the sections of the tire side and the rim protection part also have corresponding concentric arc structures with the same curvature radius, so that the cambered surface radius of the inner wall of the side part of the tire is larger and gentler, when the vulcanization process operation is implemented in the tire processing process, the air bag stretches and expands in the tire more easily along with the continuous increase of the inflation pressure in the air bag, so as to ensure the full and comprehensive lamination of the outer wall of the air bag and the inner wall of the tire, and particularly, the full lamination of the inner wall of the tire shoulder and the outer wall of the air bag, which are not easy to laminate in the prior art, can be effectively ensured, thereby ensuring the uniform and full stress of the whole inner wall of the pneumatic tire, good stability of the vulcanization process, corresponding improvement of the whole product performance and quality of the pneumatic tire can be correspondingly improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view showing the difference in deformation before and after inflation of a pneumatic tire according to an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the structure of FIG. 1;

fig. 3 is a schematic view of the fitting structure of the pneumatic tire and the air bag in fig. 1.

Detailed Description

The core of the invention is to provide a pneumatic tire which has a strong side impact resistance and which has a good running comfort.

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Referring to fig. 1 and 2, fig. 1 is a schematic cross-sectional view illustrating a difference between deformation before and after inflation of a pneumatic tire according to an embodiment of the present invention; fig. 2 is a schematic partial structure of fig. 1.

In a specific embodiment, the pneumatic tire provided by the invention comprises a tread 1 and tire lips 5 positioned on two sides of the tread, wherein a tire shoulder 2, a tire side 3 and a tire rim protecting part 4 are sequentially connected between the tread 1 and the tire lips 5 from the tire tread 1 to the tire lips 5, a plane determined by the axis of the pneumatic tire and the diameter of the axis is taken as a cross section, the outer contour line of the cross section of the tire side 3 and the outer contour line of the cross section of the tire rim protecting part 4 are concentric arcs, the center of the arc is positioned on the inner side of the pneumatic tire, and the curvature radius of the outer contour line of the cross section of the tire side 3 is equal to the curvature radius of the outer contour line of the cross section of the tire rim protecting part 4.

In the practical application of the pneumatic tire, the outer profile lines of the sections of the tire side 3 and the rim protection part 4 form a concentric arc structure, and the tire side 3 and the rim protection part 4 are guaranteed to have equal curvature radiuses, so that the tire side 3 and the rim protection part 4 are mutually matched to form an outer convex integrated structure, the side shock absorption effect of the whole pneumatic tire is effectively improved, and the overall shock resistance and the comfort of the pneumatic tire are remarkably improved.

Referring to fig. 3, fig. 3 is a schematic view illustrating a matching structure of the pneumatic tire and the air bag in fig. 1.

Further, the inner contour line of the section of the sidewall 3 and the inner contour line of the section of the rim protecting portion 4 are concentric arcs, the center of the arc is located at the inner side of the pneumatic tire, and the radius of curvature of the inner contour line of the section of the sidewall 3 is equal to the radius of curvature of the inner contour line of the section of the rim protecting portion 4. On the basis that the outer contour lines of the sections of the side wall 3 and the rim protection part 4 form concentric arcs with equal curvature radius, the inner contour lines of the sections of the side wall 3 and the rim protection part 4 also have corresponding concentric arc structures with equal curvature radius, so that the cambered surface radius of the inner wall of the side part of the tire is larger and more gentle, when the vulcanization process operation is implemented in the tire processing process, the air bag 6 stretches and expands more easily in the tire along with the continuous increase of the inflation pressure in the air bag 6, so that the full and comprehensive lamination of the outer wall of the air bag 6 and the inner wall of the tire can be ensured, and particularly, the full lamination of the positions, corresponding to the positions of the tire shoulder 2, the side wall 3 and the rim protection part 4, of the air bag 6, of the prior art can be effectively ensured, thereby ensuring that the whole inner wall of the air bag is uniformly and fully stressed, the stability of the vulcanization process is good, the processing and shaping effect is correspondingly improved, and the whole product performance and the quality stability of the air tire are correspondingly improved.

On the premise that the inner and outer contour lines of the sections of the sidewall 3 and the rim protecting part 4 have corresponding concentric equal-curvature radius structures, the sidewall thickness of the pneumatic tire can be more uniform and firm, so that the sidewall structural strength and the working condition tolerance of the pneumatic tire are effectively improved, and the overall service performance of the pneumatic tire is further improved.

In addition, it should be noted that the solid line portion and the dotted line portion shown in fig. 1 are respectively structural states of the pneumatic tire under different deformation conditions, and each portion corresponds to each other, so only one set of reference numerals is used for marking.

Specifically, the distance between the apex of the overall section outer contour line of the sidewall 3 and the rim protecting portion 4 and the actual contact end point (a as shown in fig. 2) of the tread 1 in the axial direction of the pneumatic tire and the apex of the section outer contour line of the rim protecting portion 4 (c as shown in fig. 2) (i.e., DH as shown in fig. 2) is 2mm to 6mm. This parameter range ensures that the sides of the pneumatic tire have sufficient deformation space to ensure impact resistance and structural strength during operation.

More specifically, the interval between the apex c of the cross-sectional outer contour line of the rim protecting portion 4 and the intersection point (d as shown in fig. 2) of the two end tangents of the cross-sectional outer contour line of the bead 5 in the axial direction of the pneumatic tire (i.e., H1 as shown in fig. 2) is 25mm to 35mm. It should be noted that, in particular to practical applications, if the flat ratio of the pneumatic tire (the percentage of the tire cross-sectional height to the maximum width of the cross-section, i.e., the aspect ratio of the tire) is smaller than 35, the parameter of H1 is in the range of 28mm to 33mm.

For the convenience of understanding the present solution, the structural parameters and corresponding relationships described above will be appropriately described with reference to the corresponding labels in the drawings of the present application as follows:

the radius of curvature of the outer contour line of the sidewall 3 is Ra, the radius of curvature of the outer contour line of the rim protecting portion 4 is Rb, the outer contour lines of the sidewall 3 and the rim protecting portion 4 are concentric curves, and ra=rb, that is, the arc formed by the outer contour line of the sidewall 3 and the outer contour line of the rim protecting portion 4 is co-rounded and has continuity.

The point a is a virtual point of the tread width TW at the outer end of the tread 1, that is, an end point of an actual contact portion of the tire on the ground in the axial direction of the tire, and the point c is an apex of a flange of the rim protecting portion 4 in the cross-section outer contour line. L ' is a base line of the rim protecting part 4, L ' is an ac point connecting line, namely, the outer contour line of the side wall 3 is connected with the outer contour line of the rim protecting part 4 to form an integral convex base line, L is an integral convex bead formed by the outer contour line of the side wall 3 and the outer contour line curve of the rim protecting part 4, L is set to have the maximum protruding amount DH relative to L ' and is more than or equal to 2mm and less than or equal to 6mm, and the vertical distance H1 between the bead lip 5 and the top point of the section outer contour line of the rim protecting part 4 (namely, the distance between the point c and the point d in the figure along the axial direction of the pneumatic tire) is more than or equal to 25mm and less than or equal to 35.

Of course, the above structural parameters and the dimensions thereof are only preferable schemes for satisfying most working conditions, and in practical application, the operator can flexibly adjust the values of the parameters according to the working conditions and production requirements, and in principle, the structural parameters and the dimensions thereof can satisfy the practical use requirements of the pneumatic tire.

On the other hand, the shoulder 2, the sidewall 3, and the rim protecting portion 4 are integrally formed. The integral structure can further ensure that the deformation of the whole tire structure, particularly the side part of the tire, is changed into integral coherent change rather than uneven local sectional change, thereby remarkably improving the structural consistency and the structural strength of the pneumatic tire and correspondingly improving the shock resistance and the comfort of the pneumatic tire.

In addition, the pneumatic tire is a rubber article. The rubber part has higher structural strength, flexibility, wear resistance and better working condition tolerance, and can fully meet the actual use requirement of the pneumatic tire. Of course, in specific applications, other materials with certain deformability, such as silica gel or resin materials, and good structural strength and wear resistance may be used as the manufacturing material of the pneumatic tire according to different working conditions, and in principle, any material may be used as long as the material can meet the actual use requirements of the pneumatic tire.

In summary, the cross section outline of the side wall and the rim protection part of the pneumatic tire provided by the invention form a concentric arc structure, and the two have equal curvature radiuses, so that the side wall and the rim protection part are mutually matched to form an outer convex integrated structure, and the side wall and the rim protection part can generate linkage deformation when being impacted by the structure, so that the side shock absorption effect of the whole pneumatic tire is effectively improved, the overall shock resistance and the comfort of the pneumatic tire are obviously improved, and the driving comfort of a vehicle is correspondingly improved.

The pneumatic tire provided by the present invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The utility model provides a pneumatic tire, includes the tread and is located the bead of tread both sides, the tread with between the bead from tread department to bead department has connected gradually tire shoulder, side wall and rim protection part, its characterized in that: taking a plane determined by the axis of the pneumatic tire and the diameter of the axis as a cross section, wherein the cross section outer contour line of the side wall and the cross section outer contour line of the rim protection part are concentric arcs, the circle center of the arc is positioned at the inner side of the pneumatic tire, and the curvature radius of the cross section outer contour line of the side wall is equal to the curvature radius of the cross section outer contour line of the rim protection part;

the inner contour line of the section of the side wall and the inner contour line of the section of the rim protection part are concentric arcs, the center of the arc is positioned at the inner side of the pneumatic tire, and the curvature radius of the inner contour line of the section of the side wall is equal to the curvature radius of the inner contour line of the section of the rim protection part;

the distance between the vertex of the outer contour line of the whole section of the tire side and the rim protection part and the connecting line between the actual ground contact end point of the tread along the axial direction of the pneumatic tire and the vertex of the outer contour line of the section of the rim protection part is 2 mm-6 mm.

2. A pneumatic tire as in claim 1, wherein: the interval between the top point of the section external contour line of the rim protection part and the intersection point of the tangent lines of the two end parts of the section external contour line of the tire lip along the axial direction of the pneumatic tire is 25 mm-35 mm.

3. A pneumatic tire as in claim 1, wherein: the tire shoulder, the tire side and the rim protecting part profile are of an integral structure.

4. A pneumatic tire as in any one of claims 1 to 3, wherein: the pneumatic tire is a rubber part.