JPS5813362B2 - Wheel - Google Patents

Description

Detailed Description of the Invention The present invention supports a vehicle in place of the air pressure in the tire when the air enclosed in the tire is lost due to a tire puncture, etc., so that the vehicle can run safely and easily without any hindrance. It is about wheels that can be moved.

Generally, when a tire loses its filled air due to a puncture or other reason while the vehicle is running, it is extremely dangerous and virtually difficult to replace the flat tire on expressways or crowded roads. It would be very convenient if the vehicle could be driven safely and easily to the nearest repair shop even on roads where tires can be replaced, since the driver would not have to change the tires, which is troublesome and time-consuming.

Therefore, even if a tire becomes flat, there is a desire to develop a safety tire that can be used to safely drive the vehicle to a repair shop, etc., with as little damage to the tire as possible. Various wheels have been proposed in which a flat protector is built into the tire to support the vehicle in place of the air pressure in the tire in the event of a puncture, allowing the vehicle to run safely. It is desirable that the tire has enough rigidity to support the vehicle in place of the air pressure in the tire when the tire is punctured, and also has elasticity that can absorb the impact from the tire and buffer the impact applied to the vehicle body.

In view of the above, the present invention provides rigidity that can reliably support a vehicle in place of the air pressure inside the tire in the event of a tire puncture, thereby minimizing damage to the tire and ensuring smooth and safe running of the vehicle. It is an object of the present invention to provide a vehicle with a simple structure, which also has elasticity capable of buffering shocks to the vehicle body, and which reduces deterioration of riding comfort as much as possible.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. Figs. 1 and 2 show a part of the wheel of the present invention in longitudinal section, and this safety wheel is a tubeless tire (hereinafter simply a tire). ) consists of T1 split rim R1 flat protector FP and bead stopper BS.

Below, these configurations will be explained in order.

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, It is constructed by integrally extending bead portions 3, 3 whose thickness is gradually increased from 2, 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 1. 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 work together to form a flat cylindrical support surface of the split rim R that supports the inner peripheral surfaces of a flat protector FP and 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.

Further, the outboard rim 5 is equipped with a known air supply valve (■) on the outside, and an air supply hole 8 that communicates between this air supply valve V and the outer peripheral surface of the rim base 11 of the inboard rim 6 is provided in both rims 5 and 6. A hole is drilled through the joint surfaces, and an O-ring 33 surrounding the air supply hole 8 is interposed between the joint surfaces.

The opening of the air supply hole 8 on the rim base 11 is located between a pair of side walls 14 and 15 of a flat protector FP, which will be described later.

Next, the configuration 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 is also formed into a special cross-sectional shape to maintain appropriate rigidity so that it can fully fulfill its function. In order to have appropriate elasticity, they are made of elastic materials such as synthetic rubber, natural rubber, and synthetic resin.

Next, the cross-sectional shape will be explained in detail. It is formed symmetrically, and has a pair of annular side walls 14 and 15 facing each other with a gap between them, and the side walls 14 and 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 H-shaped with an annular groove 17 on the central outer circumferential surface. ing.

A plurality of ventilation holes 1 are provided in the center of the bridge wall portion 16 in the circumferential direction.
8 are bored, and these ventilation holes 18 communicate between the air supply hole 8 and the groove 17.

An annular reinforcing strip 19 made of one or more non-stretchable materials such as steel wire is buried in the outer periphery of the side wall portions 14 and 15 of the flat protector FP, respectively, and the above-mentioned reinforcing strip 19 is also embedded in the bridge wall portion 16. An annular reinforcing strip 20 made of a non-stretchable material such as a plurality of steel wires is sandwiched between the ventilation holes 18.
are embedded therein, and the reinforcing strips 19 and 20 serve to increase the rigidity of the flat protector FP formed of an elastic body.

Further, a bead portion support 21 is formed at the base end of the outer surface of the side wall portions 14, 15 of the flat protector FP, and is curved concavely so as to be able to abut the inner surface of the bead portions 3, 3 of the tire T. 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 base end of the inner surface of the side wall portions 14 and 15. Bead stopper B
An annular projecting piece 23 is provided to prevent the S from moving outward in the circumferential direction.

Next, the structure of the bead stopper BS will be explained. As shown in FIGS. 3 and 4, the bead stopper Bs is configured in a ring shape by pivotally connecting a plurality of stopper units U, and each stopper unit The body U surrounds the periphery of a rectangular plate member 24 curved in an arc shape with vertical edge pieces 25 , 25 and horizontal edge pieces 26 , 26 , and further includes the plate member 24 .
, a pair of ears 29 at one end in the longitudinal direction of the main body 28 configured to have sufficient rigidity by reinforcing the vertical edge pieces 25, 25 and the horizontal edge pieces 26, 26 with lattice-like rib pieces 27; 2
9 are provided parallel to each other with a gap between them, and a pair of ears 30, 30 are provided at the other end in parallel with a spacing slightly wider than the ears 29, 29. A connecting pin 31 is provided in one of the pair of ears 29, 29 protruding from each other, and a pin hole 32 into which the connecting pin 31 can be inserted is bored in the other pair of ears 30, 30. There is.

Then, one pair of ears 29, 29 of the two stopper units u, u to be connected to each other is inserted into the pin holes 32, 32, and the two stopper units u, u are freely moved around the connecting pin 3L31. It can be connected so that it can be bent.

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

The bead stopper BS is made of nylon resin, aluminum alloy, steel, or the like.

The flat protector FP and bead stopper Bs configured as described above are installed into the tire T as follows. First, the flat protector FP is installed into the tire T from the opening on the inner peripheral surface of the tire T. The bead portion 3 of the tire T
, 3 corresponds to the inner meaning.

Since the flat protector FP is made of an elastic body and has an open inner peripheral surface, 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 peripheral surface thereof, and its both sides are connected to the stopper bearing surface 22 of the flat protector FP.
, 22.

When assembling the bead stopper BS into the tire T, the bead stopper BS can be easily inserted into the tire T because each stopper unit U constituting it can be freely bent outward and inward in the radial direction around the connecting pin 31. Can be incorporated.

After the flat protector FP and bead stopper BS are assembled into the tire T, the split rim R consisting of the above-mentioned outboard rim 5 and inboard rim 6 is assembled from both sides of the tire T, and then the split rim R is assembled with a plurality of connecting bolts 7. When connected, the rim bases 9, 11 of the out and inboard rims 5, 6 fit the inner peripheral surfaces of the flat protector FP and bead stopper BS, and the left and right bead portions 3, 3 of the tire T fit into the inner peripheral surfaces of the bead stopper BS. Both side surfaces and the rim flanges 10, 12 of the split rim R are strongly clamped via the side walls 14, 15 of the flat protector FP, and the space between the tire T and the split rim R is maintained airtight.

Finally, pressurized air is injected from the air supply valve V, and the pressurized air passes through the air supply hole 8, fills the inside of the flat protector FP, and then passes through the air hole 18 and the annular groove 17 to the inside of the tire T. Filled.

At the beginning of this supply of pressurized air, the tire T is flattened by the weight of the vehicle as shown by the chain line in FIG.
Even if it is in contact with the outer circumferential surface of P, since an annular groove 17 is formed on the outer circumferential surface, the ventilation hole 1 that opens there
8 is not blocked by the flat tire T, and therefore, the inside of the tire T can be filled with pressurized air without being obstructed by the flat protector FP.

In addition, when the tread part 1 of the tire T comes to be supported by the flat protector FP due to a puncture of the tire T, the air supply valve V lubricates those friction parts to prevent damage to each part caused by friction. Also inject an appropriate amount of lubricant.

In this case, the lubricant is applied to the flat protector FP at the beginning of injection.
However, when the wheel rotates, it naturally moves to the inside of the tire T through the vent hole 18 due to the action of centrifugal force, and is prepared for the lubrication.

When the air chamber of the tire T is filled with air at a predetermined pressure, the vehicle is supported by the air pressure inside the tire T, as shown by the solid line in Figure 1, but now a tire T puncture accident, etc. When the air enclosed in the tire T is lost, the tire T collapses and the tread portion 1 becomes flat and comes into contact with the upper surface of the flat protector FP, as shown by the chain line in Figure 1, causing the vehicle to become damaged. The flat protector FP will support the air pressure in the tire T, but
In particular, since the flat protector FP has the above-described configuration, the load on the tire T can be distributed and supported almost equally between the pair of side walls 14 and 15 without being hindered by the bridge wall 16. On the other hand, the bridge wall portion 16 provides rigidity to both side wall portions 14 and 15, thereby preventing them from collapsing.

Therefore, the vehicle can be safely driven to, for example, the nearest repair shop.

As described above, according to the present invention, the center of the outer circumferential surface is formed by a pair of side walls facing each other with an interval and a bridging wall section integrally connecting the sides slightly inward from the outer circumferential surfaces of these side walls. Since the flat protector is constituted by an elastic annular body having an approximately H-shaped cross section and having an annular groove in its part, this flat protector can be easily inserted into a predetermined position within the tire by appropriately deforming it. Of course, in the event of a tire puncture, the both side walls always work together to distribute and support the external force applied to the tire, and the rigidity of these walls is reinforced by the bridge wall. This enables the vehicle to be driven safely without damaging the tires or significantly impeding ride comfort.

In addition, a ventilation hole is provided in the bridge wall to communicate between the annular groove provided in order to ensure distributed support for the load on both side walls and the air supply hole opening in the rim base. Even when flat, the ventilation holes will not be blocked.
That is, by using the grooves as air passages, it is possible to fill the inside of the tire with air without being hindered by the flat protector.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal sectional view of the vehicle of the present invention, Fig. 2 is a longitudinal sectional view of another part of the same wheel, Fig. 3 is an overall perspective view of the bead stopper, and Fig. 4 is a partially exploded perspective view of the bead stopper. be. 1...Tread part, 3...Bead part,
8... Air supply hole, 9, 11... Rim base, 14, 15. ．． ．． ．． ．． ．． Side wall part, 16...
Bridge wall part, 17... Groove, 18... Ventilation hole, FP... Flat protector, R...
...Split rim, T...Tubeless tire (tire), V...Air supply valve.

Claims (1)

[Claims] 1 A split rim that can be split in the wheel axis direction and has an air supply valve on the outside, a tubeless tire mounted on the split rim, and an air chamber surrounded by the tubeless tire and the split rim, the inner peripheral surface of which is a flat protector adapted to the rim base of the split rim and supported on both sides by the bead portion of the tubeless tire to support the tread portion of the tubeless tire upon loss of enclosed air within the tubeless tire; The flat protector has a pair of annular side walls that face each other with a gap between them, and an annular bridging wall that integrally bridges and connects the side walls slightly inward from the outer circumferential surface of the side walls.
The elastic annular body has an approximately H-shaped cross section and has an annular groove in the center of its outer peripheral surface, and has an opening in the rim base of the split rim, connected to the air supply valve, and between the pair of side walls of the flat protector. 1. A wheel, wherein an air supply hole is formed to communicate with the air supply hole, and a ventilation hole is formed in a bridge wall portion of the flat protector to communicate the recess and the air supply hole.