JP2004306673A - Method of holding member in tire air chamber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hold a member with a specific function in a tire air chamber without using a special tire or a special wheel. <P>SOLUTION: A wheel unit 1 of a vehicle is composed of a wheel 10 and a tire 20 attached to the wheel 10. The wheel unit 1 has a tire air chamber between a rim 11 of the wheel 10 and the tire. A sound absorption member 30A is placed inside the tire air chamber and held therein. The member 30 is held in the tire air chamber with a holding part 31 having a thin portion sandwiched between a bead 21 of the tire 20 and a bead seat 11A of the rim 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a holding method for inserting and holding a member having a predetermined function into a tire mounted on a vehicle such as an automobile.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in order to know the state of a running tire, an attempt has been made to attach an air pressure sensor or a temperature sensor to the tire or wheel (see Patent Document 1, etc.). Further, since the wheel (tire) is a part that is in direct contact with the road surface, various sensors have been attached to obtain various kinds of information by interaction between the road surface and the wheel. Also, in order to reduce road noise due to air column resonance in the tire air chamber, an attempt has been made to provide a sub-air chamber for noise reduction on a rim or the like, or to put a sound absorbing material (muffling material) into the tire air chamber ( See Patent Document 2, Patent Document 3, etc.). Further, a sound field is changed by changing a shape of a tire air chamber, and a member for reducing air column resonance is attached to a wheel (see Patent Document 4).
[0003]
[Patent Document 1]
JP 2001-246914 A (paragraph 0014, FIG. 1, FIG. 2, etc.)
[Patent Document 2]
JP-A-2002-234305 (Claim 1, FIG. 1, etc.)
[Patent Document 3]
JP-A-6-106903 (Claim 1, FIG. 1, etc.)
[Patent Document 4]
Japanese Patent Application Laid-Open No. 2001-113902 (Claim 1, FIG. 9, etc.)
[0004]
[Problems to be solved by the invention]
However, conventionally, it has been necessary to process the wheel itself including the rim, process the valve for injecting air, or process the tire itself. In other words, the tires and wheels had to be special. For this reason, a technique of attaching a member having a predetermined function without making a tire or a wheel special is desired. Further, a technique is desired that does not impair the assemblability of the tire, for example, when the auxiliary air chamber is provided later.
[0005]
Therefore, it is a main object of the present invention to provide a method for holding a member in a tire air chamber that can realize such a demand.
[0006]
[Problems to be solved by the invention]
The present invention which solves the above-mentioned problem (claim 1) provides a vehicle wheel having a tire mounted on a wheel with a predetermined function in a tire air chamber formed between the rim of the wheel and the tire. This is a method for holding a member in a tire air chamber by inserting and holding a member having the following. And the method of holding the member in the tire air chamber is such that the thin portion of the holding portion having the thin portion is sandwiched between a bead portion of the tire and a bead seat portion of the rim, and the A member is held in the tire air chamber.
[0007]
According to this configuration, the thin portion of the holding portion is fixed between the bead portion and the bead sheet portion, and the member is held by the fixed holding portion. Here, since the portion between the holding portions is thin, it does not affect the assemblability (assembly state) between the tire and the rim. Thereby, airtightness is maintained and air leakage can be prevented. The thin portion may be the portion to be sandwiched, and it does not matter whether the other portion is thick or thin. Further, the thickness of the other portion of the holding portion may be smaller than the thickness of the thin portion between which the holding portion is sandwiched. Examples of the member having a predetermined function include sensors such as a temperature sensor, a pressure sensor, and a strain sensor, a transceiver for transmitting and receiving detection data and commands, an electronic circuit, an actuator, and a battery for driving these components. Can be Furthermore, examples of the member having a predetermined function include a sub-air chamber for reducing road noise, a sound absorbing material (muffling material), and a member for changing a sound field shape.
In addition, a member such as a pressure sensor may be directly held in the tire air chamber via a holding portion, or the member is in a container or a protection member, and the container or the protection member in which the member is placed. May be held in the tire air chamber via a holding portion having a thin portion. Further, the member and the holding portion may be in a donut shape continuous at 360 ° or may be partial.
[0008]
The present invention (Claim 2) is characterized in that, with respect to the holding of the member of Claim 1, a holding portion having a structure that can be temporarily fixed to a bead portion of the tire is used.
According to this configuration, the holding portion can be temporarily fixed to the bead portion of the tire, that is, the member can be temporarily fixed to the tire, so that the tire can be easily mounted (assembled) on the wheel.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a method for holding a member in a tire air chamber of the present invention (hereinafter abbreviated as “holding method” as appropriate) will be described in detail with reference to the drawings, taking a case where a vehicle is a vehicle as an example.
[0010]
[First Embodiment]
First, a first embodiment of the present invention will be described with reference to FIG.
The first embodiment is an embodiment in which the sound absorbing material 30 (30A) is held in the tire air chamber by the holding method of the present invention, thereby reducing road noise due to air column resonance. FIG. 1 to be referred to is a perspective view schematically showing a cross section of a main part of a wheel cited for explaining a holding method of the first embodiment.
[0011]
The wheel 1 shown in FIG. 1 has a structure in which a tire 20 is mounted on a wheel 10 including a rim 11 and a disk 12. The wheel 10 and the tire 20 are normal, and the bead seat portion 11A of the rim 11 and the bead portion 21 of the tire 20 are in close surface contact, so that the airtightness of the tire air chamber is maintained. Reference numeral 11B is a rim flange.
[0012]
In the first embodiment shown in FIG. 1, a sound absorbing material 30A having a substantially circular cross section as the member 30 is formed in a donut shape, and surrounds the outer circumference on one side of the rim 11 by 360 °. The sound absorbing material 30A has a holding portion 31 (31A) made of a separate member mounted on the outer peripheral side of the sound absorbing material 30A in a flange shape. The holding portion 31A has a concave shape, and the bead portion 21 of the tire 20 is fitted into the concave portion. That is, the holding portion 31A has a structure that can be temporarily fixed to the bead portion 21 of the tire 20, and facilitates the assembly of the tire 20 to the wheel 10. It is assumed that the peripheral length of the concave portion of the holding portion 31A and the length of the bead portion 21 into which the concave portion is fitted have been adjusted. The material of the sound absorbing material 30A is not limited to a special material, but may be appropriately selected from a wide range of materials such as cloth, polyester, and nylon, and used alone or in combination. The material of the holding portion 31A is appropriately selected and used, such as resin or rubber.
[0013]
The operation of the method of holding the sound absorbing material 30A in the air chamber will be described.
First, (1) a sound absorbing material 30A to which the wheel 10, the tire 20, and the holding portion 31A are attached is prepared. The wheel 10 and the tire 20 are normal. Next, (2) the sound absorbing material 30A is temporarily fixed to the tire 20. The temporary fixing is performed by fitting the concave portion of the holding portion 31A into the bead portion 21. (3) After the holding portion 31A (that is, the sound absorbing material 30A) is temporarily fixed to the bead portion 21 of the tire 20, the tire 20 is assembled to the wheel 10 in the temporarily fixed state. At the time of assembling, since the sound absorbing material 30A is temporarily fixed to the tire 20, the tire 20 can be mounted on the wheel 10 without the sound absorbing material 30A being in the way. In addition, since the thin portion of the holding portion 31 is sandwiched between the bead seat portion 11A and the bead portion 21, the sound absorbing material 30A does not hinder the assembling of the tire from this point as well. Also, since it is thin, it does not affect the assembled state after the assembly. It should be noted that the thin portion refers to whether or not the thinned portion is evaluated by evaluating the assembled state, and does not mean whether a portion (thin portion) sandwiched in comparison with other portions of the holding portion 31A is thin or thick. Incidentally, the holding portion 31A is reliably held between the bead seat portion 11A and the bead portion 21 by the strong contraction force of the rubber constituting the tire 20.
[0014]
According to the first embodiment, the sound absorbing material 30A having a predetermined function can be retrofitted into the tire air chamber without modifying the commercially available wheels and tires. Therefore, even with existing wheels and tires, road noise due to air column resonance can be reduced. Therefore, for example, it is not necessary to buy a new wheel, tire, or the like in order to reduce road noise.
[0015]
Further, according to the first embodiment, since the holding portion 31A is sandwiched between the bead seat portion 11A and the bead portion 21 over the entire circumference, the sound absorbing material 30A as the member 30 having a predetermined function can be reliably mounted on the tire. Fixed to air chamber. In addition, the holding | maintenance part 31A does not necessarily need to be provided over the whole circumference | surroundings, and may have a suitably cut-out part. Or you may make it provide the holding | maintenance part 31A in places. Incidentally, even if there is a cutout portion in the holding portion 31A, the portion to be sandwiched is a thin portion, so that the bead portion 21 of the tire is deformed and airtightness is maintained.
[0016]
Although the sound absorbing material 30A is provided over the entire circumference, the sound absorbing material 30A may be provided discontinuously (in a fragmentary manner). At this time, it does not matter whether the holding section 31A is continuous or discontinuous.
[0017]
Further, since the sound absorbing material 30A is held in the tire air chamber by using a contact portion between the bead seat portion 11A and the bead portion 21 (that is, a corner portion), the corner portion is moved (blurred) by the sound absorbing material 30A. And the sound absorbing material 30A can be more reliably held in the tire air chamber.
[0018]
In the first embodiment, an example is shown in which the sound absorbing material 30A (main body portion) and the holding portion 31A are formed by different members. However, as shown in FIG. The portion 31 (31B) may be made of the same member as the sound absorbing material 30A. At this time, a coat portion 31B 'using an airtight member may be provided outside the holding portion 31B as necessary so that airtightness is maintained.
[0019]
[Second embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
The second embodiment is an embodiment in which the holding method of the present invention holds the sub air chamber forming member 30 (30B) including the sub air chamber in the tire air chamber, thereby reducing road noise due to air column resonance. . FIG. 3 to be referred to is a diagram illustrating a cross section of a main part of a wheel cited for describing a holding method according to a third embodiment. Note that portions common to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0020]
The sub air chamber forming member 30B shown in FIG. 3 includes a sub air chamber having a predetermined length in the circumferential direction of the tire 20 or the rim 11. The auxiliary air chamber is communicated with the tire air chamber through a communication hole H, thereby generating a resonance frequency for canceling air column resonance generated in a 250 Hz band and reducing road noise due to air column resonance. Have been.
[0021]
The holding portion 31 (31C) is integrally formed of the same material as the sub air chamber forming member 30B. Incidentally, the sub air chamber forming member 30B may be made of metal or resin. Further, it may be made of rubber. The holding portion 31C has a concave shape similarly to the holding portion 31A in the first embodiment, and can be temporarily fixed to the bead portion 21 of the tire 20. For this reason, the tire 20 can be assembled to the wheel 10 in a state of being temporarily fixed to the tire 20 as in the first embodiment.
[0022]
According to the second embodiment, as in the first embodiment, a secondary air chamber for reducing road noise due to air column resonance is retrofitted without any modification to the existing wheel 10 or tire 20. Can be put into the tire air chamber. Further, various effects are obtained, such as the auxiliary air chamber forming member 30B can be securely held in the tire air chamber as in the first embodiment without impairing airtightness.
[0023]
[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG.
In the third embodiment, the noise absorption material 30C is held in the tire air chamber by the holding method of the present invention, and the air pressure sensor 41, a transmitter, and the like are incorporated in the noise absorption material 30C, thereby reducing road noise due to air column resonance. This is an embodiment in which air pressure is reduced and air pressure is transmitted to an external device. FIG. 4A to be referred to is a partially cutaway plan view schematically showing a sound absorbing material in which the air pressure sensor and the like cited for explaining the holding method of the third embodiment are incorporated. FIG. 4B is a sectional view taken along line AA of FIG. In the third embodiment, the sound absorbing material 30 (30A) of the first embodiment will be described as being replaced with a sound absorbing material 30C incorporating an air pressure sensor or the like. For this reason, FIG. 1 referred to in the first embodiment is appropriately referred to. In addition, portions common to the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.
[0024]
As shown in FIG. 4, an air pressure sensor 41, a temperature sensor 42, a transmitter 43, and a power supply 44 are embedded in the sound absorbing material 30 </ b> C while being connected by a wiring 45. The sound absorbing material 30C corresponds to a protection member such as the air pressure sensor 41. The pressure detecting portion of the air pressure sensor 41 has a pressure transmitting hole (not shown) for transmitting the pressure of the tire air chamber. In addition, a vent through which the temperature in the tire air chamber is transmitted is formed in the temperature sensing portion of the temperature sensor 42. Incidentally, the temperature sensor 42 may directly measure the temperature of the tire 20.
[0025]
Also, as shown in FIG. The sound absorbing material 30C has a holding portion 31 (31D). The sound absorbing material 30C is temporarily fixed to the tire 20 by the holding portion 31D.
[0026]
As the air pressure sensor 41 and the temperature sensor 42, general ones can be used. The transmitter 43 has a function of appropriately transmitting the pressure and temperature detected by the sensors 41 and 42 wirelessly. The power supply 44 is a battery that drives the sensors 41 and 42 and the transmitter 43. The power supply 44 may be a generator that generates power by vibration or the like. By making it a generator in this way. This saves the trouble of replacing the battery, which is very convenient.
Incidentally, the transmitted pressure data and temperature data are received by a receiver (not shown), and various analyzes are performed or used for control.
[0027]
According to the holding method of the third embodiment, similarly to the first and second embodiments, the member 30 having a predetermined function can be reliably held in the tire air chamber. In addition, the tire can be easily assembled. Note that the sensors 41 and 42, the transmitter 43, and the power supply 44 may be housed in one housing (container) and held by the holding member 31.
[0028]
The present invention described above can be widely modified without being limited to the above embodiment. For example, the vehicle wheel 10 may be made of iron, aluminum, or a magnesium alloy. Also, the vehicle wheel 10 has been described as being composed of the rim 11 and the disk 12, but for example, the disk 12 may be a wheel spoke. The number of the sub air chambers is not particularly limited. For example, one sub-air chamber that surrounds the rim 11 one round may be configured. Further, the type of the sensor is not particularly limited.
[0029]
Further, as shown in FIG. 5 (a), the holding portion 31 may straddle the left and right bead seat portions, and the sound absorbing material 30 may be provided on both the left and right sides. Further, as shown in FIG. 5 (b), the holding portion 31 may straddle the left and right bead seat portions, and the sound absorbing material 30 may be provided at the center thereof. Further, as shown in FIG. 5C, the holding portion 31 may extend over the left and right bead seat portions, and the sound field shape changing member 50 may be provided at the center thereof. In addition, it does not matter whether the member 30 and the holding portion 31 are formed integrally or separately. The structure that can be temporarily fixed may be, for example, a pin. In addition, such a member 30 is arranged at a position in consideration of the static balance and the dynamic balance of the wheel 1. Also, the vehicle has been described as an example of a land vehicle such as an automobile, but may be an aircraft.
[0030]
【The invention's effect】
According to the first aspect of the present invention described above, a member having a predetermined function can be held in the tire air chamber by using an existing wheel or tire as it is. According to the second aspect of the present invention, the assembling of the tire is further facilitated.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a cross section of a main part of a wheel cited for describing a holding method according to a first embodiment of the present invention.
FIG. 2 is a diagram schematically showing a cross section of a main part of a wheel cited for describing a modified example different from FIG. 1;
FIG. 3 is a diagram schematically illustrating a cross section of a main part of a wheel cited for describing a holding method according to a second embodiment of the present invention.
FIG. 4A is a partially cutaway plan view schematically showing a sound absorbing material in which an air pressure sensor and the like cited for describing a holding method according to a third embodiment of the present invention are incorporated. (B) is a sectional view taken along the line AA in (a).
FIG. 5 is a diagram illustrating a modification according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Wheel 10 ... Wheel 11 ... Rim 11B ... Bead seat part 12 ... Disk 20 ... Tire 21 ... Bead part 30 ... Member 30A ... Sound absorbing material 30B ... Sub air chamber forming member 30C ... Sound absorbing material 31 ... Holding parts 31A, 31B ... Holder

Claims (2)

For a vehicle wheel configured by mounting a tire on a wheel, a member having a predetermined function is inserted and held in a tire air chamber formed between the rim of the wheel and the tire, A method for holding a member,
Sandwiching the thin portion of the holding portion having the thin portion between the bead portion of the tire and the bead seat portion of the rim, and holding the member in the tire air chamber through the holding portion;
A method for holding a member in a tire air chamber, characterized in that: The method for holding a member in a tire air chamber according to claim 1, wherein a holding portion having a structure that can be temporarily fixed to a bead portion of the tire is used for holding the member.

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