JPH06297922A - Pneumatic tire assembly and core assembly for pneumatic tire - Google Patents

Abstract

PURPOSE:To enable safe travel in the fixed distance even when the internal pressure of a tire is lowered, and inform a driver of the lowering of internal pressure of the tire. CONSTITUTION:A core assembly 12 for a pneumatic tire is internally mounted to a pneumatic tire assembly 10. A rim 16 is provided with an internal pressure sensor 20 near the outside of a well part 16A, and the internal pressure of the pneumatic tire is sensed by this internal pressure sensor 20. An electric circuit 21 serving as a transmitting means is mounted on the tire outer face of the internal pressure sensor 20, and a signal corresponding to the state of the internal pressure sensor 20 is sent to the outside of the pneumatic tire assembly 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire assembly and a core assembly for a pneumatic tire, and particularly when the internal pressure of the pneumatic tire is decreased, the vehicle driver is informed of the decrease of the internal pressure and at a certain distance. The present invention relates to a pneumatic tire assembly and a core assembly for a pneumatic tire that enable safe running of the vehicle.

[0002]

2. Description of the Related Art Conventionally, it has been known to mount a core assembly in a pneumatic tire as a technique for improving safety during tire puncture or run-flat due to air leakage.

However, in these pneumatic tires, when the internal pressure of the tire decreases, the driver may not notice the decrease in the internal pressure, so it is considered that a sudden steering wheel operation is performed. Due to a decrease in the tire internal pressure, the vehicle body may not follow the steering wheel operation, or conversely, the vehicle body may suddenly change direction and spin due to the steering wheel operation.

On the other hand, a pneumatic tire assembly which detects the internal pressure of a pneumatic tire, the distortion of a wheel and the like and informs the driver of the vehicle is disclosed in Japanese Patent Laid-Open No. 183926/1993.
No. 3,136, etc., none of these pneumatic tire assemblies internally incorporates a core assembly, and a run-flat with high safety was practically impossible.

[0005]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention enables safe driving for a certain distance even when the internal pressure of the tire is decreased, and can notify the driver of the decreased internal pressure of the tire. It is an object to obtain a pneumatic tire assembly and a core assembly for a pneumatic tire.

[0006]

According to a first aspect of the present invention, a pneumatic tire, a rim to which the pneumatic tire is mounted, and two or more arc-shaped body end portions are superposed and connected to each other. It is assembled in an annular shape by being fitted to the outside of the rim portion, and when the pneumatic tire is crushed due to a decrease in internal pressure and the inner surface of the crown portion of the pneumatic tire comes into contact with the radial outer end of the well portion. In a pneumatic tire assembly consisting of a pneumatic tire core assembly that slides and rotates, an internal pressure sensor that senses the internal pressure of the pneumatic tire, and an electrical signal that corresponds to the state of the internal pressure sensor. And a transmitting means for sending the pneumatic tire assembly to the outside.

Further, the present invention according to claim 2 is assembled in an annular shape by overlapping and connecting ends of two or more arcuate bodies, and at the outside of the well portion of the rim on which the pneumatic tire is mounted. The core assembly for a pneumatic tire, which is slipped and rotated on the well portion when fitted and the pneumatic tire is crushed due to a decrease in internal pressure and the inner surface of the crown portion of the pneumatic tire comes into contact with the radial outer end thereof. In the above, an internal pressure sensor for detecting the internal pressure of the pneumatic tire and a transmitting means for transmitting an electric signal according to the state of the internal pressure sensor to the outside of the pneumatic tire are characterized by being provided.

[0008]

According to the pneumatic tire assembly of the present invention as set forth in claim 1, the internal pressure of the tire is sensed by the internal pressure sensor, and an electric signal corresponding to the state of the internal pressure sensor is transmitted by the transmitting means to the pneumatic tire assembly. Sent outside of. Therefore, by detecting or receiving this electric signal by the detection unit on the vehicle body side, it is possible to notify the driver of the decrease in the tire internal pressure. Therefore, when the internal pressure of the tire decreases, the core assembly for a pneumatic tire supports the load applied to the tire, which enables safe driving for a certain distance and informs the driver of the decrease in the internal pressure of the tire. You can

Further, in the core assembly for a pneumatic tire according to a second aspect of the present invention, the internal pressure of the tire is sensed by an internal pressure sensor provided in the core assembly for a pneumatic tire. An electric signal corresponding to the state is transmitted to the outside of the pneumatic tire by the transmitting means provided in the core assembly for a pneumatic tire. Therefore, by receiving this electric signal by the receiving means of the detection unit on the vehicle body side, it is possible to inform the driver of the decrease in the tire internal pressure. Therefore, when the internal pressure of the tire decreases, the core assembly for a pneumatic tire supports the load applied to the tire, which enables safe driving for a certain distance and informs the driver of the decrease in the internal pressure of the tire. You can Moreover, since both the internal pressure sensor and the transmitting means are provided in the core assembly for the pneumatic tire, a general wheel can be used and the assembly can be easily performed.

[0010]

EXAMPLE A pneumatic tire assembly according to a first example of the present invention will be described with reference to FIGS.

As shown in FIG. 1, the pneumatic tire assembly 10 of this embodiment includes a core assembly 1 for a pneumatic tire.
2 are decorated.

As shown in FIG. 2, the pneumatic tire core assembly 12 is composed of at least two arc members 14 (three in this embodiment), as is well known.
Both ends 14A, 14B of each arc-shaped member 14 are assembled in an annular shape by overlapping and connecting them.

As shown in FIG. 1, the cross-sectional shape of the pneumatic tire core assembly 12 as viewed from the circumferential direction is an I (eye) shape, and the inner peripheral surface has a bead of the pneumatic tire 18. The portion 18A is rotatably fitted to the outer peripheral surface of the well portion 16A of the rim 16 to which the portion 18A is fixed. The core assembly 12 for a pneumatic tire is made of a resin having high rigidity, and its outer peripheral surface 1
2A corresponds to a central portion in the tire width direction of the inner peripheral surface of the tread portion 18A of the pneumatic tire 18.

Further, the rim 16 is provided with an internal pressure sensor 20 near the outside of the well portion 16A toward the inside of the tire. The internal pressure sensor 20 detects the internal pressure of the pneumatic tire. ing. In addition, an electric circuit 21 as a transmission unit that leads an electric signal according to the state of the sensor to the outside of the rim 16 is attached to the outer surface of the tire of the internal pressure sensor 20. Electric circuit 21
Is a coil 21A and a resistor 2 as shown in FIG.
1B and a capacitor 21C are provided. To detect the information in the tire, the detection unit 26 is connected to the electric circuit 21.
It is provided on the vehicle body side at a position corresponding to. This detection unit 26
As shown in FIG. 4B, the oscillation coil 26A provided at the tip and the oscillation section 26B to which the oscillation coil 26A is connected.
The oscillator 26B is connected to the signal processor 26C, and the signal processor 26C is connected to the display 26D. Further, a power source 26E such as an oscillating unit is also provided.

The electromagnetic induction type as described above may be used, or the radio wave type as described below may be used. This radio wave type has an internal pressure sensor like the electromagnetic induction type, but on the outer surface of the tire, an electric circuit that sends radio waves according to the state of the sensor, an antenna and a power source are provided on the rim, and the vehicle body side is A receiving unit, a display unit, and a power supply are provided as the detection unit.

As shown in FIG. 3, a tire internal pressure display portion 30 is provided on the instrument panel of the vehicle. The tire internal pressure display unit 30 includes a detection unit 26 (see FIG.
A digital meter 30A for displaying the internal pressure of each pneumatic tire 18 detected or received in (see) is provided,
These digital meters 30A are used for each pneumatic tire 1
It blinks when the internal pressure of 8 falls below a predetermined value. Further, the tire internal pressure display portion 30 has a buzzer 3
0B is provided, and this buzzer 30B emits a warning sound when the internal pressure of at least one of the pneumatic tires 18 becomes equal to or lower than a predetermined value, and lowers the internal pressure of the pneumatic tires 18 to the driver. It is supposed to inform.

The power source 24 is preferably a small, lightweight, long-life lithium battery or the like, and is preferably replaceable in consideration of replacement when the battery is exhausted.

When the internal pressure of the pneumatic tire 18 decreases, the pneumatic tire 18 is crushed on the ground contact side (upper side in FIG. 1) as shown by the imaginary line in FIG. The assembly 12 contacts the road surface via the crown portion 18A. At this time, the core assembly 12 for the pneumatic tire supports the crown portion 18A of the pneumatic tire 18 from the inside to prevent the collapse, and enables the runflat of the pneumatic tire 18 in a state where the internal pressure is reduced. Rim 1 by the force given from the tire 18
6 slide on the outer peripheral surface of the well portion 16A and rotate. As a result, it is possible to improve the safety during run-flat due to puncture or air leakage.

A pneumatic tire assembly according to a second embodiment of the present invention will be described with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 5, in this embodiment, an inner pressure sensor 20 is provided on the side wall portion 12B of the core assembly 12 for a pneumatic tire, and an electric circuit provided outside the inner pressure sensor 20. A transmitting antenna 22 extending from 21
Is an outer peripheral surface 12A in the core assembly 12 for a pneumatic tire.
It is located in the vicinity. Further, a power source 24 for operating the internal pressure sensor 20 and the electric circuit 21 is replaceably incorporated in the core assembly 12 for a pneumatic tire.

If the internal pressure sensor 20 is attached to a portion in contact with the inner surface of the pneumatic tire 18, the internal pressure sensor 20 may be damaged at the time of run-flat, and
Since the internal pressure sensor 20 may damage the pneumatic tire 18, the internal pressure sensor 20 is preferably attached to the side wall portion 12B of the pneumatic tire core assembly 12.

As shown in FIG. 8, the internal pressure sensor 20 may be provided inside the core assembly 12 for a pneumatic tire. In this case, the through hole 23 communicating with the inside of the pneumatic tire needs to be provided in the side wall portion 12B. The transmitting antenna 22 may be provided on the side wall portion 12B which is an outer surface of the core assembly 12 for a pneumatic tire, but in order to prevent deterioration of reception accuracy due to reflection of radio waves or the like, the tire tread portion and the rim 16 are provided. As far away as possible from
The central portion within the tire cross section is preferred. In addition, the transmitting antenna 22 may have various commonly used shapes,
It can be sent efficiently by adding directivity.

As shown in FIG. 6, the transmitting antenna 22 is wired from the electric circuit 21 along the arcuate member 14. As shown in FIG. 9, the wiring of the transmitting antenna 22 may extend from the electric circuit 21 along the arc-shaped member 14 in both directions. Further, as shown in FIG. 10, the wiring of the transmitting antenna 22 may be spirally extended from the electric circuit 21 along the arc-shaped member 14 in one direction.

On the other hand, as shown in FIG. 7, the receiving antenna 40 attached to the vehicle body side is preferably located at a position facing the side portion 18B of the pneumatic tire 18. This is because the tread portion 18A of the pneumatic tire 18 contains many steel belts, and these steel belts block the radio waves. In addition, the receiving antenna 4
It is preferable that 0 is arranged in a ring shape corresponding to the rotation locus of the transmitting antenna 22 so that the relative positional relationship does not change due to tire rotation. Furthermore, the signal frequency is legally limited by the electric field strength, so 322 MH
Since it is set to z or less and the antenna is shortened, a quarter wavelength is preferable.

Therefore, this embodiment has the same effect as that of the first embodiment, and since the inner pressure sensor 20, the electric circuit 21, etc. are provided in the core assembly 12 for a pneumatic tire, a general wheel is used. It is possible and easy to assemble.

[0026]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, it is possible to safely drive a certain distance even when the internal pressure of the tire is lowered, and it is possible to notify the driver of the decrease in the internal pressure of the tire. Have.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a pneumatic tire assembly according to a first embodiment of the present invention, taken along the tire circumferential direction.

FIG. 2 is a perspective view showing a core assembly for a pneumatic tire according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a tire internal pressure display portion according to the first embodiment of the present invention.

FIG. 4A is a schematic diagram showing a sensor and an electric circuit according to the first embodiment of the present invention, and FIG. 4B is a schematic diagram showing a detection unit of the first embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a pneumatic tire assembly according to a second embodiment of the present invention, taken along the tire circumferential direction.

FIG. 6 is a perspective view showing a core assembly for a pneumatic tire according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing a receiving antenna according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a core assembly for a pneumatic tire according to another embodiment of the present invention, taken along the tire circumferential direction.

FIG. 9 is a perspective view showing a core assembly for a pneumatic tire according to another embodiment of the present invention.

FIG. 10 is a perspective view showing a core assembly for a pneumatic tire according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pneumatic tire assembly 12 Pneumatic tire core assembly 14 Arc member 16 Rim 16A Well part 18 Pneumatic tire 20 Internal pressure sensor 21 Electric circuit (transmitting means) 22 Transmitting antenna 24 Power supply 26 Detecting part 40 Receiving antenna

Claims (2)

[Claims] 1. A pneumatic tire, a rim on which the pneumatic tire is mounted, and two or more arc-shaped bodies are assembled in an annular shape by overlapping and connecting end portions thereof,
When the pneumatic tire is fitted to the outside of the rim portion and the pneumatic tire is crushed by a decrease in internal pressure and the inner surface of the crown portion of the pneumatic tire comes into contact with the radial outer end of the pneumatic tire, the pneumatic tire slides on the well portion and rotates. In a pneumatic tire assembly comprising a tire core assembly, an internal pressure sensor for detecting an internal pressure of the pneumatic tire,
A pneumatic tire assembly comprising: a transmitting unit that sends an electric signal according to the state of the internal pressure sensor to the outside of the pneumatic tire assembly. 2. A pneumatic tire is assembled into an annular shape by overlapping and connecting end portions of two or more arc-shaped bodies, and is fitted to the outside of a well portion of a rim on which a pneumatic tire is mounted, so that the pneumatic tire has an internal pressure. When the inner surface of the crown portion of the pneumatic tire comes into contact with the radial outer end of the pneumatic tire due to lowering, it senses the inner pressure of the pneumatic tire in the core assembly for the pneumatic tire that slides and rotates on the well portion. A core assembly for a pneumatic tire, comprising: an internal pressure sensor, and transmitting means for sending an electric signal according to the state of the internal pressure sensor to the outside of the pneumatic tire.