CN218519481U - Racing car tire - Google Patents

Abstract

The utility model provides a cycle racing tire, include: the tire comprises a tire crown, tire shoulders positioned on two sides of the tire crown and tire sides connected with the tire shoulders, wherein the innermost structures of the tire crown, the tire shoulders and the tire sides are arranged into a tire body layer, a rubber sheet is partially attached to the inner surface of the tire body layer, and the rubber sheet has viscosity. The embodiment of the utility model provides a cycle racing tire to the particularity of cycle racing tire application scene, cancels current tire and sets up the inner liner in the internal side of matrix layer, and the weight of the car racing tire that alleviates that can relatively outstanding improves the acceleration performance of cycle racing tire.

Description

Racing car tire

Technical Field

The utility model belongs to the technical field of the tire, especially, relate to a cycle racing tire.

Background

With the increasing popularity of racing in our country, people have increasingly increased their liking and scale requirements for racing, and various small-sized racing cars, such as kart cars and formula cars, are popular among people due to their low cost and easy availability.

As the demand for racing sports increases, so too does the demand for racing tires. Furthermore, racing tires, being the only component of a race car that comes into contact with the ground, have a direct impact on the performance and speed of the race car. At present, most of small racing cars still adopt common small-size passenger radial tires, the adaptability of the small racing cars to the extreme speed performance is not changed, and the requirement of the racing car acceleration performance is difficult to meet.

SUMMERY OF THE UTILITY MODEL

To at least one weak point that exists among the prior art, the utility model provides a cycle racing tire, it has cancelled the inner liner, reduces the holistic weight of cycle racing tire, has improved the acceleration performance of cycle racing tire.

The utility model provides a cycle racing tire, include: the tire comprises a tire crown, tire shoulders positioned on two sides of the tire crown and tire sides connected with the tire shoulders, wherein the innermost structures of the tire crown, the tire shoulders and the tire sides are arranged into a tire body layer, a rubber sheet is partially attached to the inner surface of the tire body layer, and the rubber sheet has viscosity.

In some embodiments of the present invention, the racing tire further includes a bead located at the lower end of the sidewall, the central portion of the bead is provided with a bead ring, the two ends of the carcass layer surround the bead ring, the rubber sheet includes two first rubber sheets, and the two first rubber sheets are respectively attached to the inner surface of the carcass layer at the two sides of the tire and extend upwards to the sidewall portion from the bead portion.

In some embodiments of the present invention, the lower end of the first rubber sheet does not exceed the bottom of the bead ring.

In some embodiments of the invention, the two first films are symmetrical with respect to the central axis of the crown.

In some embodiments of the present invention, the film comprises a second film attached to the inner surface of the carcass layer at the crown portion.

In some embodiments of the invention, the midpoint of the second film is located at the midpoint of the crown.

In some embodiments of the present invention, the size of the rubber sheet in the tire cross section is 20mm or more.

In some embodiments of the utility model, the side wall includes the sidewall glue that is located the side wall outside, and the thickness of sidewall glue is 2 ~ 4mm.

In some embodiments of the present invention, the arc radius of the shoulder is 5-20 mm.

In some embodiments of the present invention, the bead part is provided with a bead filler between the carcass layer and the first rubber sheet and the sidewall rubber.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

(1) The embodiment of the utility model provides a cycle racing tire to the particularity of cycle racing tire application scene, selectively cancels current tire and sets up the inner liner in the carcass inboard to can be more outstanding weight that alleviates the cycle racing tire, improve the acceleration performance of cycle racing tire. In addition, due to the elimination of the tire inner liner, the production cost is reduced and the production flow is simplified.

(2) The embodiment of the utility model provides a car racing tire adds first film or second film in the inboard on matrix layer, can increase the viscidity between matrix layer and the building drum, avoids the phenomenon of skidding of matrix layer in the forming process, improves the laminating quality on matrix layer.

(3) The embodiment of the utility model provides a cycle racing tire, through the thickness of control side wall, further lighten the whole weight of cycle racing tire.

(4) The embodiment of the utility model provides a cycle racing tire through the profile design to tire shoulder position, has increased the ground area, improves cycle racing tire's the performance of controlling.

(5) The embodiment of the utility model provides a car racing tire through add at the bead position and establish bead infantees, can improve car racing tire lateral wall's support nature and control the performance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic cross-sectional view of a prior art pneumatic tire;

fig. 2 is a schematic cross-sectional view of a racing tire according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a racing tire according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a racing tire according to an embodiment of the present invention.

In the figure:

10. an inner liner layer;

1. a crown; 2. tire shoulders; 3. a sidewall; 31. sidewall rubber; 4. a bead; 41. a bead ring; 42. wrapping the cloth at the bead opening; 101. a carcass layer; 102. a film; 1021. a first film; 1022. a second film.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some, not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that such a development effort might be complex and tedious, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, given the benefit of this disclosure, without departing from the scope of this disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, the terms "inner" and "outer" are described with respect to the inside or outside of the tire; specifically, the "inner" is a direction toward the inside of the tire, and the "outer" is a direction toward the outside of the tire.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a cross-sectional view of a prior art pneumatic tire. As shown in fig. 1, an inner liner 10 is disposed in an innermost layer of a tire, and the inner liner 10 generally includes two layers of materials, namely, an inner liner located at the innermost side and a transition layer located between the inner liner and a carcass layer, wherein the inner liner can prevent air leakage of the pneumatic tire, and the transition layer can form a good fit with the carcass layer. The present application makes targeted adjustment to the structure of the tire for a special scene of racing based on the existing pneumatic tire, and is specifically described in detail below.

As shown in fig. 2, embodiments of the present invention provide a racing tire, comprising: the tire comprises a crown 1, tire shoulders 2 and tire walls 3, wherein the tire shoulders 2 are positioned on two sides of the crown 1, the tire shoulders 3 are connected with the tire shoulders 2, and the innermost layer structure of the crown 1, the tire shoulders 2 and the tire walls 3 is set as a tire body layer 101.

Because the car racing tire usually is comparatively serious after a match finishes, can change new car racing tire before the match next time, and consider the in-process of car racing at every turn, the race stroke is limited, and pneumatic tire is not high to the requirement of gas tightness in shorter race stroke, consequently the embodiment of the utility model discloses to the particularity of car racing tire application scene, selectively cancel current pneumatic tire and set up the inner liner at the internal side of matrix layer 101 to can be more outstanding weight that alleviates the tire, improve the acceleration performance of tire. In addition, due to the elimination of the tire inner liner 101, the production cost is reduced and the production flow is simplified.

It is understood that the carcass layer 101 may be provided as one or more than two layers as required, and the number of the carcass layer 101 is not particularly limited in the present application.

Because of the elimination of the tire inner liner, the carcass layer 101 is directly contacted with the forming drum as the innermost layer material in the forming process of the tire blank, but because the carcass layer 101 is made of a carcass cord as a framework material and coated with rubber, the viscosity is low, and the slip phenomenon can occur in the process of jointing each half part on the forming drum by using the carcass layer 101 as a base material.

In order to solve the above problem, in some embodiments of the present invention, the inner surface of the carcass layer 101 is partially attached with the adhesive sheet 102, and the adhesive sheet 102 has adhesiveness.

As an embodiment of the film 102, the film 102 is provided as a first film 1021, and the first film 1021 has two films and is attached to both sides of the carcass layer 101. Specifically, as shown in fig. 2, the racing tire further includes a bead 4 located at the lower end of the sidewall 3, a bead ring 41 is disposed at the center portion of the bead 4, two ends of the carcass layer 101 are disposed around the bead ring 41, the rubber sheet 102 includes two first rubber sheets 1021, and the two first rubber sheets 1021 are respectively attached to the inner surface of the carcass layer 101 at two sides of the tire and extend from the bead 4 portion to the sidewall 3 portion. By attaching the first rubber sheet 1021 to the inner surface of the carcass layer 101 near the bead 4 on both sides, both sides of the carcass layer 101 can be bonded to the drum during the molding process, thereby improving the quality of the attachment of the carcass layer 101. It is understood that the first rubber sheet 1021 is made of a material having viscosity for achieving the above purpose, and for example, it can be made of a rubber material similar to that of the existing inner liner or carcass ply coating rubber.

In some embodiments, as shown in fig. 2, the lower end of the first rubber sheet 1021 does not exceed the bottom of the bead ring 41, so that the carcass layer 101 can smoothly turn up the bead ring 41 to form the bead 4 when the building drum is used for building, and the problems of unsuccessful turning up of the carcass layer 101 or turning up defect due to the adhesion of the first rubber sheet 1021 to the carcass layer 101 are avoided.

In some embodiments, the first film 1021 has a dimension in the cross-sectional dimension of the tire of 20mm or more, which provides sufficient adhesion for bonding both sides of the carcass layer 101 to the building drum. Further, it is understood that the size of the first film 1021 should be as small as possible to reduce production costs while providing sufficient tackiness.

In some embodiments, the first films 1021 on both sides of the tire are symmetrically arranged relative to the central axis of the tire crown 1, so that the influence on the uniformity of the racing tire caused by the attachment of the first films 1021 can be avoided.

In some embodiments, as shown in fig. 2, the sidewall 3 includes a sidewall rubber 31 located at the outermost side of the sidewall 3, the sidewall rubber 31 extends from the sidewall 3 to the bead 4 and wraps the carcass layer 101 and the first rubber sheet 1021 at the bead 4 portion to form a bead portion for fitting the racing tire to the rim.

In some embodiments, the sidewall rubber 31 has a thickness of 2 to 4mm. Controlling the thickness of the sidewall rubber 31 within the above range can reduce the weight of the sidewall 3, thereby further reducing the overall weight of the racing tire.

As another embodiment of the rubber sheet 102, the rubber sheet 102 is provided as a second rubber sheet 1022, and the second rubber sheet 1022 has one and is attached to the middle portion of the carcass layer 101. Specifically, as shown in fig. 3, the rubber sheet 102 includes a second rubber sheet 1022, and the second rubber sheet 1022 is attached to the inner surface of the carcass layer 101 at the crown 1 portion, so that the middle portion of the carcass layer 101 is bonded to the building drum during the building process, further ensuring the attaching quality. It is understood that the second rubber sheet 1022 is made of a material having adhesiveness for the above purpose, and for example, can be made of a rubber material similar to the existing inner liner or carcass ply coating rubber.

In some embodiments, the midpoint of the second film 1022 is located at the midpoint of the tire crown 1, so that the tire crown 1 has symmetry on both sides of the midpoint, and the influence on the tire uniformity of the racing vehicle caused by the attachment of the second film 1022 is avoided.

In some embodiments, the dimension of the second rubber sheet 1022 in the tire cross section is 20mm or more, which can provide sufficient adhesion for bonding the middle portion of the carcass layer 101 to the building drum. Further, it is understood that the size of the second film 1022 should be as small as possible to reduce production costs while providing sufficient tackiness.

In some embodiments, as shown in fig. 2, the sidewalls 3 include a sidewall rubber 31 located at the outermost side of the sidewalls 3, the sidewall rubber 31 having a thickness of 2 to 4mm. Controlling the thickness of the sidewall rubber 31 within the above range can reduce the weight of the sidewall 3, thereby further reducing the overall weight of the racing tire.

The shaped footprint created by the contact of the loaded tire with the ground is due to the compression of the tire structure between the rim and the ground. The mechanism of the footprint center is relatively simple, primarily circumferential deformation of the tire, but the footprint edges are more complex. When a shoulder rubber of a certain thickness is added, the deformation of the tire body is limited, and thus, pressure is generated on the shoulder rubber. When the tire shoulder rubber material is thick, the compressive stress borne by the tire shoulder rubber material is large, so that the generated compression change is large, the radial compression can increase the circumferential contact length, and the length of the impression edge is increased. Therefore, in some embodiments of the present invention, the radian radius of the tire shoulder 2 is set to 5-20 mm, which can increase the length of the footprint edge and increase the ground contact area, thereby increasing the grip of the racing tire and improving the control performance of the racing tire.

In some embodiments, as shown in fig. 4, the bead 4 portion is provided with a bead filler 42 between the carcass layer 101 and the first rubber sheet 1021 and the sidewall rubber 31, which improves the support and handling performance of the sidewall of the racing tire.

Example 1

Aiming at a tyre of 10X4.6-5 specification, according to the technical scheme of the utility model, an inner liner layer is eliminated, first rubber sheets (the width is 25 mm) are respectively adhered to two sides of a tyre body layer, and the whole weight of the tyre is 1.229kg; the radian radius of the tire shoulder part is 10mm.

Comparative example

For the tire with the same specification in the embodiment 1, in the case of the conventional tire with an inner liner, the thickness of the inner liner is the same as that of the first rubber sheet in the embodiment 1, and the whole weight of the tire is 1.314kg; the radian radius of the tire shoulder part is 30mm.

Comparative analysis

Example 1 by using the first rubber sheet instead of the inner liner, the overall weight of the tire is reduced by 85g, the acceleration capability of the tire can be improved, and the dynamic performance of the racing tire can be improved.

TABLE 1 parameters associated with the print test

	Footprint contact area (cm) 2 )	Footprint ground width (mm)
			Example 1	280.02	110.23
Comparative example	260.12	100.20

Compared with the comparative example, the footprint contact area and the ground contact width of the example 1 of the present application are both increased, and the maneuverability of the racing tire is improved.

Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: modifications can still be made to the embodiments of the invention or equivalents may be substituted for some of the features; without departing from the spirit of the technical solution of the present invention, the present invention should be covered by the technical solution of the present invention.

Claims (10)

1. A racing tire, comprising: the tire comprises a tire crown, tire shoulders positioned on two sides of the tire crown and a tire side connected with the tire shoulders, wherein the innermost structures of the tire crown, the tire shoulders and the tire side are arranged into a tire body layer, a rubber sheet is partially attached to the inner surface of the tire body layer, and the rubber sheet has viscosity.

2. The racing tire of claim 1, further comprising a bead located at a lower end of the sidewall, wherein a bead ring is disposed at a central portion of the bead ring, two ends of the carcass layer are disposed around the bead ring, and the rubber sheets comprise two first rubber sheets attached to an inner surface of the carcass layer at two sides of the tire and extending upward from the bead portion to the sidewall portion.

3. The racing tire of claim 2, wherein the lower end of the first rubber sheet does not exceed the bottom of the bead ring.

4. The racing tire of claim 2, wherein the two first films are symmetrical about a central axis of the crown.

5. The racing tire of claim 1, wherein the film comprises a second film applied to the inner surface of the carcass layer at the crown portion.

6. The racing tire of claim 5, wherein the midpoint of the second film is located at the midpoint of the crown.

7. The racing tire of claim 1, wherein the film has a dimension in the cross-sectional dimension of 20mm or greater.

8. The racing tire of claim 2, wherein the sidewalls include sidewall rubber located outermost of the sidewalls, the sidewall rubber having a thickness of 2 to 4mm.

9. The racing tire of claim 1, wherein the shoulder has a radius of curvature of 5 to 20mm.

10. The racing tire of claim 8, wherein the bead portion is provided with a chafer between the carcass ply and the first rubber sheet and the sidewall rubber.

Images