JPS5845368B2 - Wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a wheel that allows a vehicle to continue traveling to a predetermined position without the need for tire replacement when the air enclosed in the tire is lost due to a tire puncture or the like. It is related to.

Generally, when a tire loses its air capacity due to a puncture or other reason while the vehicle is running, it is difficult to replace the flat tire on expressways or congested roads, and even on roads where tires can be replaced, the vehicle must be moved to the nearest location. It would be extremely convenient if the vehicle could be driven to a repair shop, etc. in the same condition as it is, since the driver would not have to change tires, which is a hassle and time consuming task.

Therefore, even if the tire becomes flat compared to before, it will remain as is.
There is a desire to develop tires that can easily drive the vehicle to the nearest repair shop, etc., with as little damage to the tires as possible under such conditions. Vehicles have been proposed that incorporate flat protectors that support the weight of tires and bead stoppers that prevent the tire from separating from the rim, allowing the vehicle to continue running even in the event of a flat tire.

By the way, after the flat protector is incorporated into the tire, it must have the function of supporting the weight of the vehicle instead of the air pressure inside the tire in the event of a tire puncture, so it is desirable that its rigidity be as stiff as possible. However, on the other hand, since this must be incorporated into the tire, the rigidity of the flat protector alone before installation is rather low, and it is desirable that it can be easily incorporated into the tire. No satisfactory flat protector existed.

In view of these points, the present invention combines a specially structured flat protector with a bead stopper, and the combined structure maintains the desired rigidity within the tire, making it easy to incorporate it into the tire. In addition, when a tire goes flat,
Reliably supports the weight of the vehicle instead of the air pressure in the tires,
The object of the present invention is to provide a wheel with a simple structure, which allows the vehicle to continue traveling, reduces shock to the vehicle body, and reduces deterioration of riding comfort as much as possible.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows a part of the wheel of the present invention longitudinally, and this wheel is a tubeless tire (hereinafter simply referred to as tire) with T1 split. The rim R1 is composed of a flat protector Fp and a bead stopper Bs.

These configurations will be explained in order below.

First, the tire T has a conventionally known structure and is formed symmetrically, with sidewall portions 2, 2 extending integrally on the left and right sides of a tread portion 1, and furthermore, these sidewall portions 2, 2. It is composed of bead portions 3, 3 which are gradually made thicker and extend integrally, and a bead wire 4 is embedded in each of the bead portions 3, 3.

Next, the structure of the split rim R will be explained. This is made by joining an outboard rim 5 and an inboard rim 6, and connecting the outboard rims 5 and inboard rims 5 and 6 together with a plurality of connecting bolts 7. The outboard rim 5 has a rim main body having a narrow rim base 9, and a rim flange 10 for holding the bead portion 3 of the tire T extending integrally at the outer end thereof. The board rim 6 is constructed by integrally extending a rim flange 12 for holding the bead portion 3 of the tire T on the outer end of a rim main body having a wide rim base 11. , 6 cooperate to form a flat cylindrical surface of the split rim R that supports the inner peripheral surface of a bead stopper Bs, which will be described later.

Further, an 01J ring 13 is interposed between the joint surfaces of the out and inboard rims 5 and 6 on the outside of the connecting bolt 7.

Next, the structure of the flat protector Fp will be explained. It is formed into an annular shape as a whole so that it can be inserted into the tire T over its entire circumference, and it has a suitable shape so that it can fully perform its function. It is made of an elastic material such as rubber or synthetic resin and has a special cross-sectional shape in order to have rigidity and elasticity.

The cross-sectional shape will be explained in detail below. It is formed symmetrically, and includes a pair of annular side wall portions 14.15 facing each other with a gap between them, and the side wall portions 14.1 of the side wall portions 14.1.
5, and a similarly annular bridge wall portion 16 which bridges and connects a portion slightly inward from the outer circumferential surface of 5, and the overall cross-sectional shape is approximately U-shaped with an annular groove 17 on the central top surface. ing.

A plurality of air holes 1 are provided in the center of the bridge wall portion 16 in the circumferential direction.
8 are bored, and the inside and outside of the flat protector Fp are communicated through these air holes 18.

An annular reinforcing strip 19 made of a non-stretchable body such as a wire is embedded in each of the parts of the flat protector Fp where the side wall portions 14.15 and the bridge wall portion 16 intersect. An annular reinforcing strip 20 made of a non-stretchable material such as a wire is buried across the air hole 18, and the reinforcing strips 19 and 20 serve to increase the rigidity of the flat protector Fp formed of an elastic material.

Further, at the base end of the outer surface of the side wall portion 14.15 of the flat protector Fp, a bead portion bearing surface 2 is provided which is curved concavely so as to fit well into and come into contact with the inner surface of the bead portions 3, 3 of the tire T.
1 is formed, and a substantially flat stopper support surface 22 that can come into contact with the outer surface of a bead stopper Bs, which will be described in detail later, is formed at the inner proximal end of the side wall portion 14.15. An annular projecting piece 23 is provided on the radially outward side of the support surface 22 to guide the bead stopper Bs and to prevent it from moving outward in the inner circumferential direction.

Next, the structure of the bead stopper Bs will be explained. As shown in FIGS. 2 and 3, the bead stopper Bs is constructed in an annular shape by pivotally connecting a plurality of stopper units U, and each stopper The unit U surrounds the periphery of a rectangular plate member 24 curved in an arc shape with a vertical edge piece 25.25 and a horizontal edge piece 26.26, and further includes the plate member 24, the vertical edge piece 25.25, and the horizontal edge piece. A pair of tabs 29, 29 protrude parallel to each other with an interval at one end in the longitudinal direction of the main body 28, which is configured to have sufficient rigidity by reinforcing the pieces 26, 26 with lattice-like rib pieces 27. In addition, at the other end, another pair of ears 30, 30 are configured to protrude in parallel with a spacing slightly wider than the ears 29, 29, one of the ears 29°. Connecting pins 31 are protruded from each of 29, and pin holes 32 into which the connecting pins 31 can be inserted are bored in the other ear pieces 30, 30.

Thus, two stopper units u connected to each other,
Press the pair of ears 29, 29 on the negative side of u in the direction of approaching each other, narrow the gap between them, insert them between the other ears 30, 30, and insert the connecting pin 31, 31 into the pin hole 3.
2.32 and release the pressing force, one of the ears 29, 29 returns to its original position by its own elastic force, the connecting pin 31, 31 fits into the bottle hole 32° 32, and the two stoppers The units u, u can be connected so as to be freely bendable around the connecting pins 31, 31.

By the above procedure, a plurality of stopper units u, u...
By sequentially connecting them, an annular bead stopper Bs is formed.

FIG. 4 shows another embodiment of the bead stopper Bs. In this embodiment, the stopper unit U constituting the bead stopper Bs is curved to fit the outer peripheral surface of the rim base 11 of the inboard rim 6. It has a rod-shaped main body 33, and two cylindrical protrusions 34, 34 are integrally provided on both sides of the main body 33 at intervals in the longitudinal direction. A pair of lug pieces 35 and 36 are integrally and alternately protruded from both ends of the holder, and one of these lug pieces 35 and 36 has a screw hole 37, and the other has a through hole 38.
are drilled in each.

To connect the two stopper units u, u, overlap the ears 35, 36 that are close to each other so that the screw hole 37 and the through hole 38 are aligned, and then insert the set screw 39 into the through hole 38 to connect the screw hole 37. to be screwed together.

The bead stopper Bs should have sufficient heat resistance and rigidity to withstand the heat, compressive force, bending force, etc. that the tire T receives when it is punctured, and be lightweight so as not to increase rotational resistance. Preferably, for example, nylon resin containing 5% to 90% glass fiber, especially 10 to 50% glass fiber.
% range is practical in terms of the above-mentioned characteristics and moldability, and other materials such as aluminum alloy materials and steel materials can be used to satisfy the above-mentioned characteristics as much as possible.

Therefore, the flat protector Fp configured as described above
The bead stopper Bs is assembled into the tire T as follows. First, the flat protector Fp
is inserted into the tire T through the opening on the inner circumferential surface of the tire T, and the concave bead support surfaces 21, 21 formed at the lower outer surfaces of the side walls 14 and 15 are inserted into the bead portion 3 of the tire T. , 3 comes into contact with the inner surface.

Since the flat protector Fp is made of an elastic body, it can be easily incorporated into the tire T by deforming the flat protector Fp.

Next, the bead stopper Bs assembled as described above is inserted into the tire T through the opening on the inner circumferential surface, and both sides of the bead stopper Bs are attached to the stopper bearing surfaces 22, 22 of the flap rotor tilter Fp.
However, the width of each stopper unit U of the bead stopper Bs is equal to the distance between the stopper bearing surfaces 22, 22 of the flat protector Fp, or has a tightening margin so that the side wall portion 14. It is charged between 15 and 15 hours.

When the bead stopper Bs is assembled into the tire T, each stopper unit U constituting the bead stopper Bs can be freely bent outward and inward in the radial direction around the connecting pin 31 or set screw 39. , the bead stopper Bs can be incorporated into the tire T without difficulty.

After the flat protector Fp and bead stopper Bs are assembled into the tire T as described above, the divided rim R consisting of the above-mentioned outboard rim 5 and inboard rim 6
are assembled from both sides of the tire T and connected by a plurality of connecting bolts 7, the flat cylindrical surface consisting of the rim bases 9, 11 of the out and inboard rims 5, 6 will be connected to the inner periphery of the bead stopper Bs. The left and right bead portions 3, 3 of the tire T are strongly sandwiched by both side surfaces of the bead stopper Bs and the rim flange 10.12 of the split rim R via the side wall portion 14.15 of the flat protector Fp. , the space between the tire T and the split rim R is maintained airtight.

A lubricant is sealed in the air chamber surrounded by the tire T and the split rim R, and when the tread portion 1 of the tire T comes into contact with the outer circumferential surface of the flat protector Fp in the event of a puncture of the tire T, the lubricant is sealed between them. The lubricant has properties such as high lubricity, low heat generation and heat resistance, and can be used in a short period of time. Preferably one that does not swell.
For example, glycerin, silicone oil, silicone grease, etc. are used.

By the way, when the air chamber of the tire T is filled with air at a predetermined pressure and the wheel is in a normal inflation state, the weight of the vehicle is supported by the air pressure inside the tire T, as shown by the solid line in Figure 1. If the air enclosed in the tire T is lost due to a puncture accident or the like, the tire T will collapse and the tread portion 1 will become flat as shown by the chain line in Figure 1, and will come into contact with the upper surface of the flat protector Fp. The flat protector Fp supports the weight of the wheels when they come into contact instead of the air pressure in the tires, and the vehicle can be kept in a running state.

According to the present invention, when the air enclosed in the tire is lost, such as when the tire goes flat, the flat protector supports the flattened tread of the tire and reduces the load on the wheel instead of the tire air pressure. In particular, a flat protector is a bridge wall that integrally connects a pair of side walls facing each other with a gap in cross-sectional shape and a portion slightly inward from the outer peripheral surface of these side walls. The cross-sectional path H
Since the tire is shaped like a letter, the load on the tire is equally divided into two on the left and right sides in the axial direction of the wheel, and the distributed load can be reliably supported by the pair of side walls. The tips of the sidewalls are firmly connected by the bridge wall, while their bases are strongly held together with the bead of the tire by the split rim and bead stopper. In cooperation with the bead stopper that closes the section, a strong annular frame with a closed cross section can be constructed, and its mechanical strength can be significantly increased. To be able to firmly support the load without causing buckling, crushing, deformation, etc. even if the load is applied intensively, and to suppress the axial displacement of the tire bead part and prevent it from separating from the rim. As a result, damage to the tires in the event of a tire blowout is reduced, allowing the vehicle to continue running, and the shock transmitted to the vehicle body is effectively absorbed by the flat protector, reducing deterioration in ride comfort. be able to.

In addition, the flat protector is made of an elastic body before it is installed in the tire, and the base of the pair of side walls is open, so it can be easily deformed and bent, and can be easily installed at a predetermined position in the tire. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view of the vehicle of the present invention, Fig. 2 is an overall perspective view of the first embodiment of the bead stopper, Fig. 3 is a partially exploded perspective view of the bead stopper, and Fig. 4 is the bead stopper. FIG. 4 is an exploded perspective view of a portion of the second embodiment. 3...Bead portion, 10, 12. ,,,, Rim flange, 14.15...Side wall part, 16...
...Bridge wall part, Bs...Bead stopper,
Fp...Flat protector, R...
Split rim, T...Tubeless tire (tire).

Claims (1)

[Claims] 1 A split rim that can be split in the wheel axial direction, a tubeless tire attached to the split rim, and a tubeless tire that is incorporated into an air chamber surrounded by the tubeless tire and the split rim, and when the air enclosed in the tubeless tire is lost, It consists of a flat protector that can support the tire, and a bead stopper that is incorporated into the air chamber and cooperates with the rim flange of the split rim to clamp the bead part of the tire. An elastic annular body formed into a collapsed H-shape by a pair of annular side walls that face each other and an annular bridge wall that integrally bridges and connects the side walls slightly inward from the outer circumferential surface thereof. , and the base end of the side wall portion of the flat protector is held between the bead stopper and the rim flange of the split rim together with the bead portion of the tire.