JPH04193602A - Solid rubber tire for industrial vehicle - Google Patents

Abstract

PURPOSE:To diffuse and radiate heat from the inside of a tire to prolong the service life of it by providing a heat radiation member, a part of which is extended to at least either one position of the periphery of the tire and near the periphery of the tire, in the tire. CONSTITUTION:A solid rubber tire for industrial vehicle 10 is so constructed that rubber material is filled into the air-filled portion of a general pneumatic tire. Namely, the inside of it in radial direction (the lower side of the drawing) is formed with a base rubber layer 14. Also the base rubber layer 14 is so constructed that short fiber 12 is mixed with hard rubber 13, whereby dislocation of a rim is difficult to be produced. In addition, the outside of the base rubber layer 14 in radial direction (the upper side of the drawing) is formed with tread rubber 16 comprising rubber material excellent in anti-wear property. In this case, a metallic plate 20 is embedded as heat radiation member in the base rubber layer 14. Then the ends 20A and 20B of the metallic plate 20 in travelling direction are disclosed from the tire side portions 10A around the periphery of the tire, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a full rubber tire for industrial vehicles used in industrial bundles such as forklifts.

[Conventional technology]

Conventionally, tires for industrial vehicles used for running on roads where screws, rocks, ore, nails, etc. are scattered, such as in factories, stone crushing sites, construction sites, or wasteland, have a heavy load and are prone to damage. Easy to accept. For this reason, in consideration of its properties such as cut resistance and abrasion resistance, it is an all-rubber tire that has a similar external shape to a general pneumatic tire, but has a solid interior made of rubber, fibers, etc. . For example, tread rubber with excellent wear resistance and cut resistance is used on the contact surface side of this all-rubber tire for industrial vehicles, and tread rubber with excellent wear resistance and cut resistance is used on the radially inner side of the tire to increase the tightening force with the rim. Uses base rubber with high compression elasticity.

However, since this all-rubber tire for industrial vehicles is solid, heat generation inside the tire increases, and the rubber inside the tire is likely to be thermally destroyed, resulting in a shortened tire life.

A possible solution to this problem is to use rubber that does not easily generate heat inside the tire as an all-rubber tire for industrial vehicles, but in this case, the cushioning properties of the tire will decrease and the ride comfort of the industrial vehicle will deteriorate. This problem occurs.

In addition, as a full rubber tire for industrial vehicles that improves the above-mentioned problems, as shown in FIG. 8, a cavity 52 is provided inside the full rubber tire 50 for industrial vehicles to suppress heat generation inside the tire, and as shown in FIG. As shown in FIG. 2, a configuration is conceivable in which the all-rubber tire 54 for an industrial vehicle is provided with a hole 56 that penetrates in the tire axial direction to radiate heat generated inside the tire to the outside of the tire.

However, in these cases, stress during tire rolling is concentrated in the cavity 52 and the hole 56, which causes damage to these areas, conversely shortening the life of the tire.

[Problems solved by the invention]

In consideration of the above-mentioned facts, the present invention aims to provide an all-rubber tire for industrial vehicles that can diffuse and radiate heat inside the tire and extend the life of the tire.

[Means to solve problems]

The all-rubber tire for an industrial vehicle of the present invention is a solid all-rubber tire for an industrial vehicle, which is disposed inside the tire and partially extends to at least one of the outer circumference of the tire and the vicinity of the outer circumference of the tire. It is characterized by the provision of a heat dissipation member.

[Effect]

In the all-rubber tire for industrial vehicles of the present invention, part of the heat generated inside the tire during tire transfer is disposed inside the tire, and a part extends to at least one of the outer circumference of the tire and the vicinity of the outer circumference of the tire. A heat dissipating member, such as a metal plate,
The layer made of steel cord conducts the heat to the vicinity of the outer circumference of the tire, where the temperature is lower. Alternatively, heat is radiated to the outside of the tire from a portion of the heat radiating member exposed to the outside of the tire.

Therefore, it is possible to prevent the generation of high temperature areas inside the tire.
Since the rubber in this area can be prevented from being damaged by heat, the life of the tire can be extended.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in FIG. 1, the all-rubber tire 10 for industrial vehicles has a structure in which the air filling portion of a general pneumatic tire is filled with a rubber material. That is, the radially inner side of the ear (lower side in Figure 1) is composed of 14 layers of base rubber. This base rubber layer 14 has a structure in which short fibers 12 are mixed into hard rubber 13, and has a structure in which rim displacement is unlikely to occur.

Further, the outer side of the base rubber layer 14 in the tire radial direction (the upper side in FIG. 1) is composed of a tread rubber 16 made of a rubber material with excellent wear resistance.

This base rubber layer 14 has a metal plate 20 as a heat dissipating member.
is buried.

As shown in FIG. 2, this metal plate 20 is connected to the tire shaft 2.
They are arranged in a ring shape along a circle centered at 2, approximately in the middle of the tire in the radial direction. Further, as shown in FIG. 1, the tire width direction ends 2OA and 20B of the metal plate 20 are
Each of them is exposed at the tire side portion 10A as the outer peripheral portion of the tire.

Next, the operation of this embodiment will be explained.

In the all-rubber tire 10 for industrial vehicles of this embodiment, part of the heat generated inside the tire during tire transfer is reduced to a low temperature by the metal plate 20 disposed inside the tire and partially exposed to the tire side portion 10A. The heat is conducted to the vicinity of the tire outer circumference inside the tire, and is radiated to the outside of the tire from the tire width direction end portion 20A120B of the metal plate 20.

Therefore, it is possible to prevent the generation of high temperature parts inside the tire.
Since the rubber in this area can be prevented from being damaged by heat, the life of the tire can be extended.

In the above embodiment, there is one layer of metal plates 20, but as shown in FIG. 3, two or more layers of metal plates 20 may be provided. In this case, as shown in FIG. 4, the metal plate 20 is divided into a plurality of pieces with a gap 24 between
They may be arranged so that their positions in the tire circumferential direction are alternated.

Further, in the above embodiment, both ends 2OA and 20B of the metal plate 20 in the tire width direction are exposed to the tire side part 10A, but as shown in FIG. Connect one side of 20B to tire side part 1
It is also possible to have a structure exposed to 0A. Also, although not shown, both ends 2OA and 20B in the tire width direction of the metal plate 20
It is not necessary to extend them to the vicinity of the tire side portion 10A and expose them to the tire side portion 10A. In this case,
Since both ends 2OA and 2OB of the metal plate 20 in the tire width direction are coated with a rubber material, the distortion at both ends 2OA and 20B of the metal plate 20 in the tire width direction is alleviated and the durability of the tire is improved. There is an advantage to doing so. in this case,
The distance between both ends 2OA, 20B of the metal plate 20 in the tire width direction and the outer circumferential surface of the tire side portion 10 is determined based on the tire width, considering the heat dissipation inside the tire, which is the object of the present invention. It should be about 10% to 20%.

Furthermore, when a layer of steel cords is used as a heat dissipation member, the steel cords may be arranged parallel to the tire equatorial plane or at a predetermined angle to the tire equatorial plane. A plurality of layers of steel cord may be laminated so as to cross each other.

Alternatively, the metal plate 20 or the steel cord layer may be curved, as shown in FIGS. 6 and 7.

(Experiment example) 10 all-rubber tires for industrial vehicles shown in Figure 1 were prototyped according to the specifications in Table 1 (tire size ID 5355/65-
15) and a solid conventional tire without metal plates, holes, etc., were subjected to a running test at a load of 6 tons/piece and a running speed of 20 m/h. The temperature at approximately the center of the tire was measured, and the results are shown in Table 1 as a temperature increase index, with the heat generation value of the conventional tire set as 100.

Table 1 From the results, it is clear that the all-rubber tire for industrial vehicles of the present invention is excellent.

〔Effect of the invention〕

The present invention provides a heat radiating member that is placed inside the tire of a full rubber tire for industrial vehicles and has a portion exposed to the outer periphery of the tire, so that the heat inside the tire can be diffused and radiated.
It has the excellent effect of extending tire life.

[Brief explanation of the drawing]

Fig. 1 is a meridian sectional view showing the upper half of the full rubber tire for industrial vehicles of this embodiment, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is an industrial vehicle tire of another example of this embodiment. A meridian cross-sectional view showing the upper half of a full-rubber vehicle tire, Figure 4 is Figure 3-4-
FIG. 5 is a meridian sectional view showing the upper half of a full rubber tire for industrial vehicles according to another example of this embodiment, FIG. 6 is a sectional view taken along line 6-6 in FIG. 5, and FIG. FIG. 8 is a meridian cross-sectional view showing the upper half of a full-rubber tire for industrial vehicles according to another example of this embodiment. FIG. 8 is a meridian cross-sectional view showing the upper half of a conventional full-rubber tire for industrial vehicles. FIG. 9 is a conventional FIG. 3 is a meridian cross-sectional view showing the upper half of another example of the all-rubber tire for industrial vehicles. DESCRIPTION OF SYMBOLS 10... Full rubber tire for industrial vehicles, 10A... Tire side part, 20... Metal plate, 2OA, 20B... End part. Figure 1 Figure 2 Figure 3 Figure 2) He. Fig. 4 Fig. 5 J Fig. 6 Fig. 7> Fig. 8 Fig. 5〇 Fig. 9

Claims (1)

[Claims] (1) A solid all-rubber tire for industrial vehicles,
1. An all-rubber tire for an industrial vehicle, comprising a heat dissipating member disposed inside the tire and having a portion extending to at least one of the outer circumference of the tire and the vicinity of the outer circumference of the tire.