JPH0728701U - Split rim for solid tires - Google Patents

Abstract

(57) [Summary] [Purpose] To allow solid tires to be easily installed in the rim while applying tension. [Structure] The rim 3 constitutes an outer edge of the wheel 1 on which the solid tire 2 is mounted, and includes split rim portions 3a and 3b and a joining member 13. The split rim portions 3a, 3b extend inward from the flat portions 10a, 10b having an outer diameter larger than the inner diameter of the solid tire 2 and one ends of the flat portions 10a, 10b, and the tip is reduced to a diameter smaller than the inner diameter of the solid tire 2. The tapered portions 11a and 11b having a diameter and the end portions 12a extending outward from the other ends of the flat portions 10a and 10b,
12b and. The joining member 13 is the split rim portion 3
The a and 3b are joined with the tapered portions 11a and 11b facing each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a split rim, and more particularly to a split rim for a solid tire for mounting a solid tire having elasticity.

[0002]

[Prior art]

 Generally, solid tires made of elastic material such as urethane foam rubber are used in relatively slow vehicles such as tricycles for children, hand carts for carrying luggage, and forklifts. Recently, solid tires for relatively fast bicycles and motorcycles have also been developed. In this type of solid tire for high-speed vehicles, if the outer diameter of the rim forming the outer edge of the wheel is the same as the inner diameter of the solid tire, it is easy to mount the solid tire on the rim. However, when rotating at high speeds, the centrifugal force causes the solid tire to expand, increasing its inner diameter, which may cause the solid tire to fall off the rim. In order to prevent this, conventionally, the inner diameter of the solid tire was made smaller than the outer diameter of the rim, and multiple solid beads were mounted inside the solid tire to limit outward expansion due to centrifugal force. ing. At the time of mounting, the inner diameter of the solid tire is expanded by an appropriate means, and a tension that resists centrifugal force is applied to the solid tire to mount it inside the rim.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional structure, since the beads for restraining the expansion and contraction are arranged, a considerably large force is required to increase the inner diameter of the solid tire, and it is difficult to mount the solid tire in the rim. This difficulty in mounting is one of the reasons why solid tires are not widely used even if they are superior in damage resistance and puncture resistance to hollow tires.

An object of the present invention is to allow a solid tire to be easily mounted while applying a tension against centrifugal force.

[0005]

[Means for Solving the Problems]

 The split rim according to the present invention constitutes an outer edge of a vehicle wheel for mounting a solid tire having elasticity, and includes first and second rim portions and a joining member. The first and second rim portions have a flat portion having an outer diameter larger than the inner diameter of the solid tire, a taper portion that extends inward from one end of the flat portion, and has a tip whose diameter is reduced to a diameter smaller than the inner diameter of the solid tire. And an end portion that extends outward from the other end of the flat portion. The joining member joins the first rim portion and the second rim portion with the tapered portions facing each other.

[0006]

[Action]

 In the split rim according to the present invention, the first rim portion and the second rim portion are arranged so that the tapered portions face each other, and the solid tire is sandwiched therebetween. When the first rim portion and the second rim portion are joined by the joining member, first, the inner diameter of the solid tire comes into contact with the tapered portion, and thereafter, as the first rim portion and the second rim portion approach each other, the solid terrain is elastically deformed. The inner peripheral part of the ear gradually moves on the tapered part toward the outer peripheral side, and the inner diameter thereof increases. As a result, tension is applied to the solid tire. When the two rim portions are joined by the joining member, the inner peripheral surface of the solid tire is mounted on the flat portion. Since the flat portion is larger than the inner diameter of the solid tire, the tension applied to the solid tire is maintained.

Here, it is possible to easily apply tension to the solid tire simply by mounting the first rim portion and the second rim portion with the joining member. Therefore, the solid tire can be easily mounted while applying tension.

[0008]

【Example】

 Referring to FIG. 1, a bicycle wheel 1 according to an embodiment of the present invention includes a solid tire 2 having elasticity and a pair of divided rim portions 3a and 3b for mounting the solid tire 2. It has a rim 3, a disc 4 connected to the rim 3, and a hub 5 arranged at the center of the disc 4.

The solid tire 2 has, for example, a structure in which a tread rubber layer having excellent wear resistance and damage resistance is provided on the ground contact side and urethane foam rubber having a high cushioning property is filled inside. As shown in FIG. 3, the inner diameter Di of the solid tire 2 alone is smaller than the outer diameter Do of a flat portion of the split rim portions 3a and 3b, which will be described later. The pair of left and right split rim portions 3a and 3b of the rim 3 extend inward from one end of the flat portions 10a and 10b and the flat portions 10a and 10b, respectively, and have a tip end having a diameter Dt (smaller than the inner diameter Di of the solid tire 2). It is an annular member having tapered portions 11a and 11b having a reduced diameter as shown in FIG. 3 and end portions 12a and 12b extending outward from the other ends of the flat portions 10a and 10b. The disc 4 is composed of a pair of left and right divided disc portions 4a and 4b. The split disc portions 4a and 4b are flat mountain-shaped discs that are continuous with the split rim portions 3a and 3b and swell slightly to the left and right in FIG. On the outer peripheral side of the split disc portions 4a, 4b, a joining member 13 made up of a bolt 13a and a nut 13b for joining the split disc portions 4a, 4b together with the split rim portions 3a, 3b is arranged at intervals in the circumferential direction. Has been done.

The hub 5 is composed of a pair of left and right split hub portions 5a and 5b. The split hub portions 5a, 5b are provided with ball bearings 15a, 15b having outer rings serrated and coupled to the inner circumferences of the split disc portions 4a, 4b, and the inner rings of the ball bearings 15a, 15b to press the hub shaft 20 to the wheel 1. There are mounting nuts 16a and 16b for mounting the pair of spacers and a pair of spacers 17a and 17b for defining the interval between the divided disk portions 4a and 4b during mounting. The outer rings of the ball bearings 15a, 15b are provided with flanges 18a, 18b for sandwiching the split discs 4a, 4b. The spacers 17a, 17b are provided on the outer races for sandwiching the split discs 4a, 4b. 18a and 18b are arranged to face each other.

Next, a procedure for assembling the wheel 1 will be described. When assembling the wheel 1, the split hub portions 5a and 5b are mounted on the hub axle 20, and the mounting nuts 16a and 16b are screwed on the outer sides of the split hub portions 5a and 5b. Further, the solid tire 2 is mounted between the split rim portions 3a and 3b. At this time, the inner circumference of the solid tire 2 is arranged so as to face the tapered portions 11a and 11b.

When the mounting nuts 16a and 16b are gradually tightened symmetrically in this state, the inner circumference of the solid tire 2 contacting the taper portions 11a and 11b becomes smaller as the distance between the split rim portions 3a and 3b becomes smaller. It moves outward along the upper surfaces of 11a and 11b, and the inner diameter expands. Then, as shown in FIG. 2, when the joining member 13 is tightened by the mounting nuts 16a and 16b while the split hub portions 5a and 5b are in close contact with each other, the inner circumference of the solid tire 2 is mounted on the flat portions 10a and 10b. It At this time, since the outer diameters Do of the flat portions 10a, 10b are larger than the original inner diameter Di of the solid tire 2, tension is applied to the solid tire 2. The tension generated at this time is such that the solid tire 2 does not fall off even if it receives a centrifugal force. As a result, even if the wheel 1 rotates at high speed, the solid tire 2 is unlikely to drop off due to centrifugal force.

Further, when the solid tire 2 is worn or damaged, the solid tire 2 can be easily removed from the rim 3 by the procedure reverse to the procedure described above. Here, the divided rim portions 3a and 3b are provided with taper portions 11a and 11b, and the solid tire 2 is gradually expanded in diameter by the taper portions 11a and 11b at the time of mounting to apply tension to the solid tire 2. The tire 2 can be easily attached to the divided rim portions 3a and 3b. Further, even when the solid tire 2 is removed, it can be easily removed only by disassembling the divided rim portions 3a and 3b.

Other Embodiments (a) As shown in FIGS. 4 and 5, a structure in which the rim 3 and the disk 4 are fastened by the joining member 13 may be used. In this case, it is not necessary to divide the disk 4 and the hub 5, and the structure can be integrated. Here, the divided rim portions 3a and 3b and the solid tire 2 are arranged on the outer periphery of the integrated disk 4, and the solid tire 2 is mounted while applying tension by tightening the joining member 13. In this embodiment, since it is not necessary to divide the disk 4 and the hub 5, the structure can be simplified. (B) In the embodiment shown in FIGS. 4 and 5, the disc 4 may be of a spoke type.

[0015]

[Effect of device]

 In the split rim for a solid tire according to the present invention, when the first rim portion and the second rim portion are joined by the joining member, the solid tire can be easily mounted while applying tension only by sandwiching the solid tire between them. .

[Brief description of drawings]

FIG. 1 is a side view of a wheel adopting an embodiment of the present invention.

FIG. 2 is a half sectional view thereof.

FIG. 3 is a half cross-sectional view showing a state before assembly.

FIG. 4 is a diagram corresponding to FIG. 1 of another embodiment.

FIG. 5 is a diagram corresponding to FIG. 2 of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 wheel 2 solid tire 3a, 3b split rim part 10a, 10b flat part 11a, 11b taper part 12a, 12b end part 13 joining member 16a, 16b mounting nut

Claims (1)

[Scope of utility model registration request] 1. A split rim for a solid tire, which constitutes an outer edge of a wheel, for mounting a solid tire having elasticity, a flat portion having an outer diameter larger than an inner diameter of the solid tire,
An annular first portion that extends inward from one end of the flat portion and has a tapered portion whose tip is reduced in diameter to a diameter smaller than the inner diameter of the solid tire, and an end portion that extends outward from the other end of the flat portion. A split rim for a solid tire, comprising: a rim portion and a second rim portion; and a joining member that joins the first rim portion and the second rim portion in a state where the tapered portions face each other.