JPH07149122A - Attaching structure of tire air pressure detector and wheel used therefor - Google Patents

Abstract

PURPOSE:To improve the working ability of the assembly and disassembly of a rim and to prevent the destruction of a tire air pressure detector while working by preventing the tire air pressure detector from turning into a projection in a tire. CONSTITUTION:An accommodating recess 2b is formed in a wheel disc part, and a circuit 5 consisting of a transmitter and a power source is attached in the recess 2b. A communicating hole 4 to make the recess 2b communicate with a wheel rim part 12 is formed, and a pressure sensor 5b is attached to the communicating hole 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire air pressure detection device mounting structure for detecting tire air pressure while a vehicle is traveling and notifying the tire air pressure to a driver, and a wheel used therefor.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional tire air pressure detecting device accommodates a circuit assembly consisting of a pressure sensor, a transmitter and a power source in one case 50, and a tire rim assembly of a rim portion 12 of a general-purpose wheel 10, In the well portion 12a into which the bead 14 of the tire is dropped when the rim is unraveled,
It was attached by tightening with the metal belt 6.

[0003]

However, in the above structure, when the tire is detached from the wheel, the tire air pressure detecting device 50 attached to the well portion 12a of the wheel is mounted on the well portion 12a inside the tire from the wheel well portion. In the tread direction, for example, height 35mm-40m
m, length 140mm in the outer peripheral direction of the wheel, thickness 20mm
Not only does it become a large protrusion, which greatly hinders the rim assembly and the rim unraveling, but when the rim assembly and the rim unraveling are inadvertently performed, the bead portion of the tire hits the tire air pressure detection device 50, and the well portion. There is a possibility that the tire pressure detection device, which is a large protrusion, may be destroyed.

Further, when mounting the tire air pressure detecting device, since the tire air pressure detecting device 50 is attached to the well portion 12a inside the tire, it is necessary to detach the tire from the wheel, and the detaching equipment therefor is required. Was needed.

The present invention has been made in order to solve the above problems. By preventing the tire air pressure detection device from becoming a protrusion inside the tire, the workability of rim assembly and rim unraveling is improved. At the same time, it is intended to prevent the tire air pressure detection device from being broken during work. Another object of the present invention is to provide a wheel suitable for easily retrofitting a tire air pressure detecting device without requiring special tire attaching / detaching equipment even after the tire and the wheel have been assembled.

[0006]

In order to achieve the above object, a first mounting structure includes a pressure sensor for detecting an internal pressure of a tire, and a transmitter for transmitting a signal from the pressure sensor as a radio signal. A mounting structure for a tire pressure detection device comprising a power supply for supplying power to the pressure sensor and a transmitter, wherein the pressure sensor is mounted on a rim portion of a wheel that internally supports the tire and is housed in a disc portion of the wheel. With a recess,
The tire air pressure detecting device has a mounting structure in which the transmitter and the power source are disposed in the storage recess.

The second mounting structure includes a pressure sensor for detecting the internal pressure of the tire, a transmitter for transmitting a signal from the pressure sensor as a radio signal, and a power supply for supplying power to the pressure sensor and the transmitter. A mounting structure for a tire pressure detection device comprising:
A storage recess is provided in the disc portion of the wheel that internally supports the tire, and a communication hole is provided in the rim portion and the disc portion so as to communicate with the tire internal space filled with air from the storage recess. The pressure sensor is fixed so as to seal the communication hole, and the transmitter and the power source are further provided in the storage recess to provide a tire air pressure detection device mounting structure.

Further, the pneumatic pressure detecting device relating to the first mounting structure is a wheel for internally supporting a tire having a rim portion and a disc portion, and a transmitter for transmitting the internal pressure of the tire as a radio signal, The wheel is characterized in that the disk portion of the wheel is provided with a housing recess for housing a power supply for supplying power to the transmitter.

Further, the air pressure detecting device relating to the second mounting structure is a wheel for internally supporting a tire having a rim portion and a disk portion, and a pressure sensor for detecting the inner pressure of the tire, and a pressure sensor A transmitter for transmitting a signal as a radio signal, a storage recess for storing the pressure sensor and a power supply for supplying electric power to the transmitter, and a communication communicating from the storage recess to the inside of the rim which is the tire air chamber. A communication hole having a mounting portion to which the pressure sensor can be mounted so as to seal the communication hole, and the communication hole are provided in the disk portion of the wheel.

[0010]

According to the first tire air pressure detecting device mounting structure of the present invention, the pressure sensor is mounted on the rim portion of the wheel, and the transmitter and the power source are installed in the storage recess provided in the wheel disc portion. -It is not necessary to attach a tire pressure detection device, which is a large protrusion, to the well portion.

According to the second tire air pressure detecting device mounting structure of the present invention, the pressure sensor, the transmitter and the power source are housed and installed in the recess formed in the disk portion forming the side surface of the wheel. -It is not necessary to attach these tire pressure sensing devices to the well portion of the rail.

Further, according to the wheel of the present invention, when mounting the pressure sensor, the transmitter and the power source, the wheel is mounted.
The tire air pressure detection device is retrofitted without any special processing on the tire and without the need for tire desorption equipment.

[0013]

1 (a) and 1 (b) are plan views showing a tire wheel of the present invention. In FIGS. 1A and 1B, a storage recess 2 is formed on the back surface of the disk portion of the wheel 1. In the storage recess 2, a transmitter and a power source in the first embodiment, a pressure sensor in the second embodiment,
It houses the transmitter and power supply.

The protective lid 3 is screwed between the protective lid 3 and the wheel disk portion 11 with packing or the like so as to cover the storage concave portion 2 in order to enhance the dustproof and waterproof effects. It prevents dust and water from entering. The protective lid 3 is preferably made of a non-metallic material such as resin so as not to interfere with the radio signal from the transmitter 5. Furthermore, when the tire air pressure detection device consisting of a circuit consisting of a pressure sensor, a transmitter and a power supply is covered with a case made of resin or the like to enhance the waterproof and dustproof effects, it is particularly necessary to protect the storage recess with a protective lid. Absent.

FIG. 2 is an enlarged vertical cross-sectional view of the periphery of the wheel storage recess 2a showing the mounting structure of the tire air pressure detection device of FIG. Here, the pressure sensor 5a is attached to the rim portion 12 of the wheel by a fixing method such as adhesion or screwing, the circuit 5 including the transmitter and the power source is arranged in the storage recess 2a, and is embedded in the disk portion 11 of the wheel. The wiring 13 sends the tire pressure signal from the pressure sensor 5a to the transmitter.

FIG. 3 is an enlarged vertical cross-sectional view of the periphery of the wheel storage recess 2b showing the mounting structure of the tire air pressure detection device of FIG. In the embodiment of FIG. 2, the wheel disk portion 11 is provided with a communication hole 4 that communicates with the inside of the rim portion 12 that is the inside of the tire air chamber from the storage recess 2b, and the end of the communication hole 4 on the storage recess side is shown in FIG. As shown in the figure, a pressure sensor having a flange portion is screwed and closely attached via a sealing means of the O-ring 11. It should be noted that the mounting means of this pressure sensor may be fixed by a method such as adhesion or screwing through a sealing means so that tire air does not leak. The circuit 5 including the transmitter and the power supply is housed in the housing recess 2b. To attach the tire air pressure detecting device to this wheel, the pressure sensitive part of the pressure sensor at the tip of the screw having the flange part as shown in FIG. 4 is moved from the storage recess provided on the back surface of the disk part of the wheel to the inner surface. The circuit 5 including a trasmitter and a power supply is inserted into the communication hole 4 having a thread through an O-ring and fixed with a screw, and the storage recess 2b is provided.
The pressure sensor and the transmitter are fixed by screwing or the like and attached by wiring. Therefore, it is not necessary to previously arrange the tire internal pressure detection device inside the wheel, and the tire can be attached without removing the tire from the wheel later. Further, with the above configuration, the power source of the tire pressure detecting device can be replaced without removing the tire from the wheel.

Next, the operation of the tire air pressure detecting device thus mounted will be described. In the tire air pressure detection device mounting structure of FIG. 1, the tire rim portion 12 is
The pressure sensor 5a attached to the semiconductor strain gauge type, the metal strain gauge type pressure sensor, or the pressure sensor such as a pressure switch is attached to the pressure sensor 5a continuously for the strain gauge type and to the set value for the pressure switch. On the other hand, the tire internal pressure is measured ON-OFF. The tire internal pressure signal from the pressure sensor is sent to a transmitter arranged in the storage recess 2a, the signal is amplified by the transmitter, and transmitted as a radio wave signal. In the tire air pressure sensing device mounting structure of FIG. 2, the air in the tire passes through the communication hole 4 and the communication hole 4
It is guided to a pressure sensor of the same type as the pressure sensor in the first embodiment, for example, a semiconductor strain gauge type pressure sensor, which is in close contact with the end of the. The tire internal pressure is measured by the pressure sensor 5b, and the tire internal pressure signal from the pressure sensor 5b is sent to a transmitter arranged in the storage recess 2b, and the signal is amplified by the transmitter and transmitted as a radio wave signal.

As shown in FIG. 6, the radio signal including the tire internal pressure information transmitted by the transmitter is received by the antenna 7 attached to, for example, the back side of the bumper, and the tire internal pressure is displayed on the display 9 through the signal processor 8. Notify the driver by displaying the information.

[0019]

According to the present invention, which has the above-described structure,
In the mounting structure described above, the formation of large protrusions inside the wheel is eliminated, and the tire pressure sensor is not destroyed when the rim assembly and the rim are unraveled. or,
In the mounting structure according to the second aspect, in addition to the above effect, all the tire air pressure sensing devices can be arranged in the storage recesses outside the tire, and the trouble of retrofitting the tire air pressure sensing device or exchanging the power source can be reduced.

Further, a wheel suitable for the mounting structure of the present invention
By using the tire, it is possible to easily attach the tire internal pressure sensing device without specially processing the wheel and without requiring the tire desorption facility.

[Brief description of drawings]

FIG. 1 is a plan view showing a wheel of the present invention.

FIG. 2 is a storage recess 2a showing the mounting structure 1 of the present invention.
FIG.

FIG. 3 is a storage recess 2b showing a mounting structure 2 of the present invention.
FIG.

FIG. 4 is a drawing showing a mounting structure of a pressure sensor of the present invention.

FIG. 5 is a diagram illustrating a conventional technique.

FIG. 6 is a view showing a vehicle equipped with a tire pressure sensing device of the present invention.

[Explanation of symbols]

 10 Wheel 11 Disk part 12 Rim part 12a Well part 2a, 2b Storage recessed part 3 Lid 4 Communication hole 50 Tire pressure sensing device 5 Transmitter, Power supply 5a, 5b Pressure sensor 6 Metal belt 7 Antenna 8 Signal processor 9 Indicator 10 , 13 wiring 11 O-ring 14 bead

Claims (4)

[Claims] 1. A pressure sensor for detecting an internal pressure of a tire,
A structure for mounting a tire air pressure detection device comprising a transmitter for transmitting a signal from the pressure sensor as a radio signal, and a power supply for supplying power to the pressure sensor and the transmitter, wherein the pressure sensor is installed inside the tire. A mounting structure for a tire air pressure detecting device, comprising: mounting on a rim portion of a supporting wheel and providing a storage recess in a disk portion of the wheel, and arranging the transmitter and a power source in the storage recess. 2. A pressure sensor for detecting the internal pressure of a tire,
A mounting structure of a tire air pressure detecting device comprising a transmitter for transmitting a signal from the pressure sensor as a radio signal, and a power source for supplying power to the pressure sensor and the transmitter, wherein A storage recess is provided in the disc portion, and a communication hole is provided in the rim portion and the disc portion so as to communicate with the tire inner space filled with air from the storage recess, and the pressure sensor and the communication hole are provided in the communication hole. A structure for mounting a tire air pressure detection device, which is fixed so as to be hermetically closed, and further has the transmitter and a power source arranged in the storage recess. 3. A wheel for internally supporting a tire having a rim portion and a disk portion, which houses a transmitter for transmitting the internal pressure of the tire as a radio signal and a power source for supplying electric power to the transmitter. A wheel, characterized in that a disk recess of the wheel is provided in the disk portion of the wheel. 4. A wheel for internally supporting a tire having a rim portion and a disk portion, the pressure sensor for detecting an inner pressure of the tire, and a transmitter for transmitting a signal from the pressure sensor as a radio signal. A housing recess for housing a power supply for supplying power to the pressure sensor and the transmitter, and a communication hole communicating from the housing recess to the inside of the rim, which is the inside of the tire air chamber, for sealing the communication hole. A wheel having a communication hole provided with an attachment portion to which the pressure sensor can be attached, in the disc portion of the wheel.