CN213892063U

CN213892063U - Winter tyre with right circular profile

Info

Publication number: CN213892063U
Application number: CN202022731756.7U
Authority: CN
Inventors: 李中英; 梁力; 吴友磊
Original assignee: Anhui Giti Radial Tire Co Ltd
Current assignee: Anhui Giti Radial Tire Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-08-06
Anticipated expiration: 2030-11-20

Abstract

The utility model discloses a winter tire with a perfect circle profile, on any radial section of the tire, the profile of the tire side is sequentially and continuously divided into an upper tire side arc, a lower tire side arc and an RS arc directly contacted with a rim from top to bottom, the radii of the upper tire side arc and the lower tire side arc are the same and are on the same circle, the circle center O of the circle is the intersection point of the tire central line and the SW line, and the circle is tangent to the RS arc; wherein the SW line is a straight line segment corresponding to the widest position of the tire.

Description

Winter tyre with right circular profile

Technical Field

The utility model relates to a tire technical field, concretely relates to winter tire with orthocircular profile.

Background

The grip force of the tire is the friction force generated by micro-sliding between the tire and the road surface when the automobile is started, braked, accelerated and turned, and the snow tire generates mutual friction force through the snow cutting and ice cutting action between the tire surface and the ground so as to generate grip force, so the grip force of the snow tire is mainly realized by the tire surface; the tire profile and structure is used to transmit forces between the tread and the rim, to ensure an optimal contact patch for the tread, to achieve a balanced and optimal state of tire grip performance and handling performance.

In order to obtain a greater grip of the winter tyre, a lower inflation pressure can be used, with a greater degree of sidewall flexing of the tyre. The winter tire in the prior art mostly adopts the same profile as a common tire, cannot adapt to the sidewall deflection of the winter tire, and has reduced service life.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a winter tyre with perfect circular profile.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a winter tyre with a right circular profile is characterized in that on any radial section of the tyre, the profile of a tyre side is sequentially and continuously divided into an upper tyre side arc, a lower tyre side arc and an RS arc directly contacted with a wheel rim from top to bottom, the radii of the upper tyre side arc and the lower tyre side arc are the same and are on the same circle, the circle center O of the circle is the intersection point of a tyre central line and an SW line, and the circle is tangent to the RS arc; wherein the SW line is a straight line segment corresponding to the widest position of the tire.

Furthermore, TDW/Sn is 70-90% between the tread width TDW of the tire and the nominal section width Sn of the tire.

Further, on any radial section of the tire, the tread profile from the highest point of the tread to the endpoint of one side of the tread is divided into a first crown arc, a second crown arc and a third crown arc in sequence, and the radius TR1 of the first crown arc, the arc length TL1 of the first crown arc, the radius TR2 of the second crown arc, the arc length TL2 of the first crown arc, the nominal section width Sn of the tire and the tread width TDW have the following relations: TL1/TDW is 0.2-0.7, TL2/TDW is 0.2-0.7, TR1/Sn is 2-5, and TR2/Sn is 0.5-2.

Further, the tire section height SH, the tire lower section height SDH, and the tire widest width SW have the following relationship: SDH/SH is 2.5% SW to 3.5% SW.

Furthermore, a main groove extending along the circumferential direction of the tread is arranged on the tread of the winter tire, and the groove depth GD of the main groove is 7.5-12.5 mm.

Compared with the prior art, the utility model has the advantages that:

the utility model provides a tire profile adopts the design of right circular type profile, and the last side wall arc of tire and the crooked degree of lower side wall arc are close more and are close just being close just round after the atress when the atress, and the dispersion is changeed to the atress, and stress is not concentrated at a certain point for resistant flexure is changeed at the side wall position of tire, when having improved the bearing capacity, extension side wall life.

Drawings

FIG. 1 is a schematic structural view of a tire according to the present invention;

FIG. 2 is a dimensional view of the tire profile of the present invention;

fig. 3 is a force analysis simulation diagram of the tire of the present invention.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a winter tyre with a perfect circle profile, on any radial section of the tyre, the profile of the sidewall 2 is continuously divided into an upper sidewall arc 21, a lower sidewall arc 22 and an RS arc 23 directly contacting with a rim from top to bottom, the radii of the upper sidewall arc and the lower sidewall arc are the same and are on the same circle, the center O of the circle is the intersection point of the central line of the tyre and the SW line, and the circle is tangent to the RS arc; wherein the SW line is a straight line segment corresponding to the widest position of the tire.

The radius of the upper sidewall arc is R1, and the radius of the lower sidewall arc is R2; r2 is obtained by drawing, and the intersection point of the SW line and the central line of the tire is taken as the center of a circle, the circle is tangent to the RS arc, the radius of the upper tire side arc is equal to that of the lower tire side arc, and the centers of the circles are the same. This kind of R1 is the tire side perfect circle type design of R2, when making the tire atress, goes up the tire side arc and is close more and close just circular behind the atress with lower tire side arc bending degree, and the tire atress is changeed the dispersion under the load-carrying condition, and stress is not concentrated under a certain point, and the tire side is more resistant to deflect, improves the bearing capacity, extension tire side life. Fig. 3 shows that the contour of the utility model is simulated by load, the sidewall is in a perfect circle shape, and the stress is more uniform.

As shown in fig. 2, TDW/Sn of the tire satisfies 70% to 90% between the tread width TDW and the nominal cross-sectional width Sn of the tire.

The nominal section width Sn refers to the theoretical section width of a tire produced by using components with standard sizes; the width SW of the widest part of the tire is the actual width of the tire section; for example, 205/55R16 tire Sn is 205.

As shown in fig. 2, in any radial section of the tire, the tread profile from the highest point of the tread 1 to the endpoint of the tread side is divided into a first crown arc 11, a second crown arc 12 and a third crown arc 13 in turn, and the radius TR1 of the first crown arc, the arc length TL1 of the first crown arc, the radius TR2 of the second crown arc, the arc length TL2 of the first crown arc, the nominal section width Sn of the tire and the tread width TDW have the following relationship: TL1/TDW is 0.2-0.7, TL2/TDW is 0.2-0.7, TR1/Sn is 2-5, TR2/Sn is 0.5-2; the tire section height SH, the tire lower section height SDH and the tire widest width SW have the following relationship: SDH/SH is 2.5% SW-3.5% SW; the tread of the winter tyre is provided with a main groove 14 extending along the circumferential direction of the tread, and the groove depth GD of the main groove is 7.5 mm-12.5 mm.

The tire section height SH is the vertical distance from the heel of the tire to the highest point of the tire surface; the height SDH of the lower end surface of the tire is the vertical distance from the heel to the widest position of the tire; TBW is the horizontal distance between the tire heels on the two sides of the tire; J-DIA is the outer diameter of the tire and D-DIA is the inner diameter of the tire.

The basic parameters of the profile comprise TDW, SW, TBW and J-DIA, the size of the profile of the tire and the optimal pressure distribution of the tire are determined according to the basic parameters, the tire is enabled to have the optimal ground contact surface, the effective ground contact area of the pattern blocks and the ground is ensured, and the ground contact stress distribution is uniform. TBW is standard rim size plus 0.5 inch; SW is determined according to the wide range of the section of the specification standard and the TBW value, so that SW meets the national standard value of the tire, the radian of the sidewall is ensured, and the tire has the best grounding surface; the difference between J-DIA and the external diameter of national standard is in the range of-4 mm to 1 mm; D-DIA is determined according to the size of the tire, and GD is 7.5 mm-12.5 mm; the profile of the tire is substantially determined by the above parameters.

The detail parameters TL1, TL2, TR1, TR2 are determined from the basic parameters.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A winter tyre having a perfectly circular profile, characterized in that: on any radial section of the tire, the outline of the sidewall (2) is sequentially and continuously divided into an upper sidewall arc (21), a lower sidewall arc (22) and an RS arc (23) directly contacted with a rim from top to bottom, the radii of the upper sidewall arc and the lower sidewall arc are the same and are on the same circle, the circle center O of the circle is the intersection point of the center line of the tire and the SW line, and the circle is tangent to the RS arc; wherein the SW line is a straight line segment corresponding to the widest position of the tire.

2. Winter tyre with perfectly circular profile according to claim 1, characterized in that: TDW/Sn is 70-90% between the tread width TDW of the tire and the nominal section width Sn of the tire.

3. Winter tyre with perfectly circular profile according to claim 2, characterized in that: on any radial section of the tire, the tread profile from the highest point of the tread (1) to the endpoint of one side of the tread is divided into a first section of crown arc (11), a second section of crown arc (12) and a third section of crown arc (13) in sequence, and the radius TR1 of the first section of crown arc, the arc length TL1 of the first section of crown arc, the radius TR2 of the second section of crown arc, the arc length TL2 of the first section of crown arc, the nominal section width Sn of the tire and the tread width TDW have the following relations: TL1/TDW is 0.2-0.7, TL2/TDW is 0.2-0.7, TR1/Sn is 2-5, and TR2/Sn is 0.5-2.

4. A winter tyre with a perfectly circular profile as claimed in claim 3, characterized in that: the tire section height SH, the tire lower section height SDH and the tire widest width SW have the following relationship: SDH/SH is 2.5% SW to 3.5% SW.

5. Winter tyre with perfectly circular profile according to claim 1, characterized in that: a main groove (14) extending along the circumferential direction of the tread is arranged on the tread of the winter tire, and the groove depth GD of the main groove is 7.5-12.5 mm.