TW201902732A - Hollow tire - Google Patents

Abstract

The invention discloses a hollow tire. The hollow tire comprises a tire crown, a tire body and a tire toe, wherein a cavity is formed in the tire body in a penetration manner; the cavity in a cross section of the tire body is 20%-50% of total area of the cross section. By utilizing the hollow tire, the maintenance can be reduced; and the hollow tire has an anti-pricking function, the use material of the tire body is saved, and the hollow tire is convenient to be assembled with the rim section.

Description

Hollow tire

The invention relates to tires; in particular to an inflatable tire.

There are three types of tires different from pneumatic tires in the prior art, which are described as follows: one is composed of a general tire and a PU foam inner tube, which can retain the grip and wear resistance of a normal tire, but After the wheel set is baked, the bearing butter will melt or lose, which will affect the smoothness of the rotation of the wheel set. In addition, the profile size of the PU foam inner tube has higher dimensional requirements, depending on the tire and the rim. Dimensions of the size. The other is a purely foamed tire. The foamed tire has a solid carcass and the interconnected tread pattern is formed in one shot, but the cross section of the tire has a small number of small pores, and the tread has a tread. Many small air holes, so less wearable, tire loss. The other is a PU honeycomb tire, but the wear resistance is also inferior to that of the existing pneumatic tire, and the cost is high.

In view of the above, an object of the present invention is to provide a hollow tire which has the advantages of low maintenance cost, low cost of using a carcass, and the like, and has the advantages of anti-piercing function, and good accommodating with the rim assembly.

In order to achieve the above object, the present invention provides a hollow tire comprising a carcass, a crown and a toe, wherein a cavity is formed inside the carcass, the crown is connected to the top of the carcass, the tire The toe is attached to the bottom of the carcass, characterized in that in the cross section of the carcass, the ratio of the cross-sectional area occupied by the cavity to the total cross-sectional area of the cross-section is between 20% and 50%.

The effect of the present invention is that the hollow tire of the present invention does not require inflation, requires less maintenance, and has the functions of anti-poke and puncture prevention. Further, the material of the carcass can be made of the same grade of rubber as that of the conventional tire of the prior art, and therefore, it can have the same wear resistance as the existing tire. In addition, with the design of the hollow tire of the present invention, the thickness of the carcass is thick, which is equivalent to having a thicker wear layer, thereby providing a longer life cycle and further improving the durability.

In order to explain the present invention more clearly, a preferred embodiment will be described in detail with reference to the drawings. Referring to FIG. 1 , a hollow tire according to an embodiment of the present invention includes a carcass 1 , a crown 2 and a toe 3 . The inside of the carcass 1 is formed with a cavity 4 ; the crown 2 Attached to the top of the carcass 1 for contact with the ground; the toe 3 is attached to the bottom of the carcass 1 for combination with a rim (or wheel frame). In particular, in the hollow tire of the present invention, the ratio of the cross-sectional area occupied by the cavity 4 to the total cross-sectional area of the cross-section of the carcass 1 is between 20% and 50% in the cross section of the carcass 1. between. Wherein, the foregoing design is a better implementable ratio obtained by the inventor through repeated experiments and repeated arguments, and further, when the area ratio of the cavity 4 is less than 20%, the cavity 4 is too small, and the rubber of the tire If the dosage is too large, the hardness of the tire will be too high. When the area ratio of the cavity 4 is higher than 50%, the cavity 4 is too large, the support system of the carcass is too thin, and the supporting force is insufficient to support the body and is easily collapsed. The situation happened.

With the above design, the hollow tire of the present invention does not need to be inflated, requires less maintenance, and by the ratio of the cross-sectional area of the cavity 4 of the carcass 1 to the total cross-sectional area of the cross-section in the cross section of the carcass 1, The design of 20% to 50% can make the carcass 1 have an appropriate balance between the overall thickness and the supporting strength, thereby providing a hollow tire having a good supporting effect and an anti-poke function, and further, the hollow tire of the present invention The thick thickness of the carcass 1 is equivalent to having a thicker wear layer, thus providing a longer life cycle and further improving its durability.

It is to be noted that, in some embodiments, at least one color distinguishing band 5 may be disposed on the crown 2, for example, in the embodiment, the color distinguishing band 5 is respectively disposed at two opposite portions of the crown 2 Wherein the thickness of the color distinguishing tape 5 is smaller than the thickness of the crown 2, and preferably, the color of the color distinguishing tape 5 is different from the color of the crown 2, and can be helpful for visual recognition by the user. .

With the above design, since the thickness of the color discrimination belt 5 is smaller than the thickness of the crown 2, when the tire is worn, the color discrimination belt 5 is depleted earlier than the crown 2, and therefore, the user recognizes the color. By distinguishing the presence or absence of the belt 5, it is possible to judge the wear of the tire, in other words, by the design of the color discrimination belt 5, the function of prompting the degree of wear of the crown 2 can be provided.

As shown in FIG. 1 and FIG. 2, in some embodiments, the inner wall surface of the cavity 4 is formed with a first arc 4a, a second arc 4b, and a second tangent 4c. The two tangent lines 4c are respectively connected to the first arc 4a and the second arc 4b to form a closed figure, wherein one of the first arc 4a and the second arc 4b is close to the crown The other is close to the toe 3, but preferably, in the embodiment, the first arc 4a is closer to the crown than the second arc 4b, and the second arc 4b is compared. The first arc 4a is adjacent to the toe 3, and the absolute value of the curvature of the second arc 4b is greater than the absolute value of the curvature of the first arc 4a, in other words, the radius of curvature of the first arc 4a near the crown is Greater than the radius of curvature of the second arc 4b near the toe. In addition, in some embodiments, preferably, the first arc 4a is designed as a superior arc, and the second arc 4b is designed as a poor arc.

Through the above design, since the distance between the two tangent lines 4c and the outer contour of the carcass 1 can be designed to be large, that is, a hollow tire having a thick sidewall can be designed, a higher strength sidewall support effect can be provided. Thereby, it is possible to prevent the undesired collapse deformation of the hollow tire during use. In addition, the thicker design of the sidewall can also improve the defensive quality of the hollow tire against puncture.

In addition, please refer to FIG. 3, in some embodiments, the cross section of the cavity 4 can also be designed as an ellipse 4d. Among them, the advantage of being designed as an ellipse is that its shape is relatively simple, and therefore, the manufacturing process is less demanding.

In addition, as shown in FIG. 1 and FIG. 4 , in some embodiments, a limiting groove 6 may be formed between the carcass 1 and the toe 3 , wherein the limiting groove 6 is used for a rim The 7-phase fits to secure the hollow tire to the rim. Preferably, in the embodiment, two limiting grooves 6 are symmetrically disposed on both sides of the toe 3, but the other applications are not limited thereto. In addition, referring to FIG. 1 and FIG. 4, in some embodiments, the toe 3 has a first rounded corner 3a and a second rounded corner 3b, and the first rounded corner 3a is located therein. Between the limiting groove 6 and the second guiding fillet 3b, and the radius of the first guiding fillet 3a is smaller than the radius of the second guiding fillet 3b.

Through the above design, the design of the larger second rounded corner 3b can facilitate the user to insert the hollow toe 3 of the hollow tire into the rim 7, and the design of the first rounded corner 3a of the corner can be beneficial. The toe 3 and the rim 7 achieve a good snap-in fixing effect, thereby restricting the undesired escape of the toe 3 from the rim 7 .

In addition, referring to FIG. 1 , FIG. 4 and FIG. 5 , in some embodiments, the toe 3 has a circumferential groove 8 formed along an inner circumferential surface of the hollow tire, and Preferably, the circumferential groove 8 is located at a central position of the toe 3 toward the rim 7, and, preferably, the circumferential groove 8 has a structure in which the groove bottom is narrow and the groove is wide. .

Through the above design, the circumferential groove 8 can provide a space for deformation and contraction of the toe 3, and therefore, when the hollow tire is assembled to the rim 7, it will facilitate the moderate deformation of the toe 3 to be inserted into the rim 7, thereby realizing Assembly work with the rim 7.

In addition, as shown in FIG. 1 and FIG. 6 , in some embodiments, a vent hole 9 may be formed to communicate the cavity 4 and the circumferential groove 8 so that the gas in the cavity 4 can pass through the vent hole 9 . Circulate and exchange with external gases such as air.

The advantage of the above design is that the load capacity of the hollow tire is almost given by the result of the sidewall. Therefore, when the tire is under load and sinks, in order to keep the internal pressure of the cavity to zero, it is necessary to There are small holes in the position through the tread. Therefore, when the hollow tire is in operation, the hollow tire will be deformed under pressure, causing a change in the volume of the cavity, thereby allowing gas to enter and exit the vent hole 9, thereby functioning as a convection heat dissipation, thereby reducing the deformation of the hollow tire due to overheating. The situation happened. Further, further, the advantage that the opening for connecting the vent hole 9 to the outside is designed in the circumferential groove 5 is that the vent hole 9 can be effectively prevented from being clogged.

In addition, as shown in Fig. 7, in some embodiments, a plurality of annular ribs 10 are formed on the inner wall surface of the cavity of the carcass. By the design of the above-mentioned annular rib 10, in addition to the effect of saving the material used for the carcass, it can also serve to strengthen the structural strength of the carcass of the hollow tire.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

[this invention]

1‧‧‧Carcass

2‧‧‧ crown

3‧‧‧toe

3a‧‧‧First rounded corners

3b‧‧‧second guide fillet

4‧‧‧ cavity

4a‧‧‧first arc

4b‧‧‧second arc

4c‧‧‧ tangent

4d‧‧‧Oval

5‧‧‧Color zone

6‧‧‧ Limit groove

7‧‧‧ rims

8‧‧‧ week slot

9‧‧‧Ventinel

10‧‧‧ ring ribs

1 is a cross-sectional view of a hollow tire in accordance with an embodiment of the present invention. 2 is a cross-sectional view of a hollow tire according to another embodiment of the present invention. Figure 3 is a cross-sectional view of a hollow tire in accordance with another embodiment of the present invention. Figure 4 is a cross-sectional view of a hollow tire in accordance with another embodiment of the present invention. Fig. 5 is a schematic view showing the hollow tire being inserted into the rim according to another embodiment of the present invention. Figure 6 is a cross-sectional view of the hollow tire in the A-A direction of Figure 1 according to another embodiment of the present invention. Figure 7 is a cross-sectional view of the hollow tire in the A-A direction of Figure 1 according to another embodiment of the present invention.

Claims (11)

A hollow tire comprising a carcass, a crown and a toe, wherein a cavity is formed inside the carcass, the crown is connected to the top of the carcass, and the bead is connected to the bottom of the carcass, The characteristic is that: in the cross section of the carcass, the ratio of the cross-sectional area occupied by the cavity to the total cross-sectional area of the cross-section is between 20% and 50%. The hollow tire according to claim 1, wherein the inner wall surface of the cavity is formed with a first arc and a second arc on the cross section, and an absolute value of a curvature of the second arc is greater than a curvature of the first arc The absolute value. The hollow tire of claim 2, wherein the first arc is adjacent to the crown relative to the second arc; the second arc is adjacent to the toe relative to the first arc. The hollow tire of claim 1, wherein the cavity has a cross section of a superior arc, a poor arc, and a closed pattern surrounded by two tangent lines between the superior arc and the inferior arc. The hollow tire of claim 1, wherein the cavity has an elliptical cross section. The hollow tire of claim 1, wherein a limiting groove is formed between the carcass and the toe, and the limiting groove is adapted to cooperate with a rim. The hollow tire of claim 6, wherein the toe has a first rounded corner and a second rounded corner, the first rounded corner is between the limiting recess and the second rounded corner And the radius of the first lead fillet is smaller than the radius of the second lead fillet. The hollow tire according to claim 1, wherein the toe has a circumferential groove formed along an inner circumferential surface of the hollow tire. The hollow tire of claim 8, comprising a venting opening communicating the cavity with the circumferential groove. The hollow tire according to claim 1, wherein the inner wall surface of the cavity is formed with a plurality of annular ribs. The hollow tire of claim 1, wherein at least one color distinguishing tape is disposed on the crown, and the color distinguishing tape has a thickness smaller than a thickness of the crown.