JP2006298231A - Wheel for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure airtightness of auxiliary air chambers for suppressing air columnar resonance in a wheel for a vehicle, to facilitate manufacturing of the wheel, and to reduce a weight of the wheel. <P>SOLUTION: The wheel for a vehicle is composed of a disk 2 and a rim 3, and is provided with a plurality of auxiliary air chambers 8 having communication holes 7 communicating with a hollow part of an installed tire, in a circumferential direction on an outer peripheral surface of a well 5 of the rim 3. The respective auxiliary air chambers 8 are formed by approximately rectangular box bodies 4 made of synthetic resin, and the plurality of box bodies 4 are continuously formed into a belt shape by integral molding using connecting plates 12. The connected plurality of box bodies 4 are wound round the outer peripheral surface of the well 5 of the rim 3, and end parts of the wound box bodies 4 at both ends are connected by a joint plate 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle wheel that suppresses air column resonance that occurs in a cavity of a tire to be mounted, and more particularly to maintain airtightness of an auxiliary air chamber that suppresses air column resonance and facilitates manufacture. In addition, the present invention relates to a vehicle wheel that is lightweight.

  In recent years, pursuing personal considerations such as vehicle handling stability and ride comfort and quietness inside the vehicle, and dealing with weight reduction from the viewpoint of environmental pollution have become important issues. Of these, a major factor that destroys quietness is air column resonance that occurs in the cavity of a tire mounted on a vehicle wheel.

  As a method of suppressing the air column resonance, conventionally, the edge of the annular plate member in the circumferential direction is joined by welding, adhesion or the like across the outer surface of the rim and one bead sheet. An air chamber is formed, divided into a plurality of air chambers by partition walls, and a communication hole communicating with the hollow portion of the tire is formed in the plate member (Patent Document 1).

  Also, a plurality of long plate-like air chamber forming members are formed with ears, and the ears are fixed to wells on the outer peripheral surface of the rim to form a plurality of air chambers. A communication hole communicating with the cavity is formed (Patent Document 2).

  Next, in recent years, ensuring safety has been highlighted, so a tire pressure sensor is installed on the vehicle wheel to detect the tire air pressure while the car is running and detect changes in driving performance due to the decrease in air pressure. It is to be.

However, this tire pressure sensor has a problem that the wheel is unbalanced. As a countermeasure against the weight unbalance, conventionally, when a plurality of decorative holes are provided in the circumferential direction of the disk, The diameter of the decorative hole is gradually reduced toward the opposite side of the position where the integrated air valve is mounted. Further, in the case of decorative holes having the same hole diameter, the hole interval is gradually increased toward the opposite side with respect to the valve mounting position (Patent Document 3).
JP 2004-106719 A JP 2004-291896 A Japanese Patent Laid-Open No. 2004-237897

  In the case of the vehicle wheel described in Patent Document 1, only the edge of the plate member is fixed to the rim. In the case of the vehicle wheel described in Patent Document 2, the ear portion of the air chamber forming member is Since it is fixed to the rim, the bonding area between the member and the rim is small at the time of fixing with an adhesive, and it is easy to cause leakage at the bonded portion, and it is difficult to ensure airtightness of the air chamber. In addition, there is a danger that the thermal shock of overheating and cooling due to running on a slope, repeated running and braking is applied to the adhesive, the adhesive deteriorates, and the member peels off.

  In addition, when the member is fixed to the rim by welding in order to strengthen the joining of the member, the member becomes a metal material of a mild steel material with a large weight, and the iron-based metal material is applied as the welding material, and the wheel This leads to an increase in weight, high fuel consumption, and environmental pollution.

In addition, the air chamber forming member is welded to the rim during rim manufacture or after assembly welding of the rim and disk, and then undergoes the steps of electrodeposition coating, water washing, drying, overcoating and drying. In the painting process, after the rim or wheel is immersed in the paint bath, the paint liquid that has entered the air chamber from the communication hole of the member is not sufficiently discharged, the paint liquid stays in the air chamber, and even after the subsequent water cleaning, Inability to remove, poor appearance due to secondary dripping during drying, and decrease in air chamber volume due to paint curing in air chamber, air column resonance cannot be sufficiently suppressed, and manufacturing is difficult There is a problem of becoming.
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle wheel that ensures the airtightness of an auxiliary air chamber that suppresses air column resonance, facilitates manufacturing, and reduces the weight. .

  In order to solve the above-mentioned problems, the present invention provides a plurality of auxiliary air chambers that are formed of a disc and a rim and have communication holes communicating with a cavity of a tire to be mounted in the circumferential direction on the outer peripheral surface of the well of the rim. In the vehicle wheel provided, each auxiliary air chamber is formed by a substantially rectangular synthetic resin box, and each box is connected by a connecting plate, and is annularly arranged on the outer peripheral surface of the well. (Claim 1).

  And it is desirable to comprise a box with the heat resistant synthetic resin whose heat-deformation temperature is 180 degreeC or more and melting | fusing point is 220 degreeC or more (Claim 2).

  Further, a plurality of boxes are continuously formed in a band shape by a connecting plate and integrally formed, and the connected plurality of boxes are wound around the outer peripheral surface of the rim, and the both ends of the wound ends are wound. It is preferable that the end portions of the box are connected by a joining plate.

  Further, an air valve for injecting air into the tire is provided in the space between the boxes, and an air sensor for detecting the air pressure of the tire is mounted, and the box on the side facing the valve space where the air valve is mounted It is desirable to narrow the space between the bodies (claim 4).

  Also, an air valve that injects air into the tire is installed in the gap between the boxes, and the tire air pressure is detected in the gap between the opposing boxes on the valve gap where the air valve is installed. It is preferable to install an air pressure sensor.

  In addition, it is desirable that the bead seat diameter of the rim is increased by 1 inch from the diameter of the reference value with respect to the well diameter, and a flat tire is mounted on the bead seat having the increased bead seat diameter.

  Further, it is preferable that the communication hole is formed by a nozzle-shaped communication portion, and the communication portion is formed in the box body from the upper surface of the box body (Claim 7).

  The present invention provides a vehicle wheel comprising a plurality of auxiliary air chambers formed in a disk and a rim and having a communication hole communicating with a hollow portion of a tire to be mounted in a circumferential direction of a well outer peripheral surface of the rim. Each auxiliary air chamber is formed of a substantially rectangular synthetic resin box, and each box is connected by a connecting plate and arranged annularly on the outer peripheral surface of the well. The auxiliary air chamber is not airtight, the suppression of air column resonance is not impaired, and it is assembled to the rim alone or the disc that has undergone the electrodeposition coating, water washing, drying, overcoating, and drying processes in the manufacturing process. The box can be fixed to the rim, making it extremely easy to manufacture, and further suppressing air column resonance sufficiently without causing the appearance defect and the reduction of the air chamber volume as in the prior art. And the box is heavy Regardless of the atmospheric made metallic materials, because it is composed of a synthetic resin, weight reduction is achieved, it is possible to prevent environmental pollution. In addition, since the box is connected by the connecting plate and is annularly arranged on the outer peripheral surface of the well, it is possible to easily mount each box on the outer peripheral surface of the well.

  And a box should just be comprised with the heat-resistant synthetic resin whose heat-deformation temperature is 180 degreeC or more and melting | fusing point is 220 degreeC or more. When the temperature of the wheel rises while the vehicle is running, especially when the usage rate of the braking device increases under the hot summer weather, the temperature of the wheel reaches 120 to 130 degrees, and it is placed in a harsh environment. By constituting with the synthetic resin, the hardness of the box is not lowered and the deformation due to softness does not occur, and the air column resonance suppression effect can be prevented from being lowered (Claim 2).

  Further, a plurality of boxes are continuously formed in a band shape by a connecting plate and integrally formed, and the connected plurality of boxes are wound around the outer peripheral surface of the rim, and the both ends of the wound ends are wound. Since the end portions of the box are connected by a joining plate, each box and each connecting plate can be integrally formed by blow molding or the like, and the formation of each box and connecting plate is extremely easy, and each box Is wound around the well, and the ends of the box bodies at both ends are connected to each other by a joining plate, so that each box body can be easily attached to the well.

  Furthermore, an air valve for injecting air into the tire is provided in the space between the boxes, and an air pressure sensor for detecting tire air pressure is installed. By narrowing the gap between the boxes, a weight balance can be secured when an air valve integrated with an air pressure sensor is mounted.

  In addition, an air valve for injecting air into the tire is installed in the gap between the boxes, and the tire air pressure is applied to the gap between the opposing boxes on the valve gap on which the air valve is mounted. By mounting the air pressure sensor to be detected, a weight balance can be ensured even when the air valve and the air pressure sensor are separate.

  In addition, the bead seat diameter of the rim is increased by 1 inch from the reference diameter with respect to the well diameter, and a flat tire is attached to the bead seat having the above-mentioned bead seat diameter, so that the well has a deep groove shape with respect to the bead seat. Thus, each box can be mounted on the outer peripheral surface of the well of the deep groove, and the tire bead does not come into contact with each box, and damage to each box can be completely prevented.

  Further, the communication hole is formed by a nozzle-shaped communication portion, and the communication portion is formed in the box body from the upper surface of the box body, whereby the communication portion forming the communication hole having a predetermined length is formed on the box body. When forming by blow molding, it can be integrally formed at the same time, the formation of the communication hole is easy, and the communication part does not protrude outward from the upper surface of the box and does not contact the tire bead.

  The best mode for carrying out the present invention will be described with reference to the drawings. In these drawings, the same reference numerals indicate the same or corresponding elements.

  A first embodiment according to the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, reference numeral 1 denotes a vehicle wheel composed of a disk 2 and a rim 3, 4 is a substantially rectangular box composed of heat-resistant synthetic resin, and the bottom surface is a well of the rim 3. 4 are provided along the outer peripheral surface of the well 5 of the rim 3 via the gaps 6 in the circumferential direction, and the bottom surface and the outer surface of the box 4 are respectively provided with the well 5. The entire bottom surface and outer surface of the box 4 are in contact with the outer peripheral surface and the side surface of the well 5. A communication hole 7 is formed through the upper surface of the box body 4, communicates with a hollow portion of a tire mounted on the wheel 1, and is mounted on the wheel 1 by an auxiliary air chamber 8 formed by the box body 4. Air column resonance generated in the cavity of a tire (not shown) is suppressed.

  9 is an air valve for injecting air into the tire mounted on the wheel 1, 10 is an air pressure sensor for detecting the tire air pressure in the tire cavity, and is integrated with the air valve 9, and the air valve 9 is a valve hole outside the rim 3. 11 and the air pressure sensor 10 is located above the well 5 of the rim 3.

  And the space | gap part between the box bodies 4 which opposes is narrow with respect to the valve | bulb space | gap part 6b between the box bodies 4 with which the air valve 9 and the air pressure sensor 10 were mounted | worn, and the distance and space | interval between each box body 4 are adjusted. .

  As shown in FIGS. 4 to 6, the four box bodies 4 are connected to the upper plate 13 of the adjacent box bodies 4 in a strip shape by the connecting plate 12, and The joining plate 14 is connected to the end portion of the plate 13 and these are integrally formed by blow molding. Further, two vertical reinforcing ribs 15 are formed in the longitudinal direction on the upper surface of the upper plate 13, and a plurality of lateral reinforcing ribs 16 are formed in the lateral direction.

  Next, each box 4 connected in a belt shape is wound around the outer peripheral surface of the well 5, and as shown in FIG. 7, the end of the joining plate 14 of one end box 4 is connected to the other end box. Overlaid on the upper plate 13 of the body 4, the ultrasonic generator 17 forms a fusion part 17 a and is joined and connected.

  Further, as shown in FIG. 8, a through-hole 18 is formed through the end of the joining plate 14 of one end box 4 and a projection 19 is integrally formed on the upper plate 13 of the other end box. Then, the protrusion 19 can be fitted into the through-hole 18, and the overheating rod 20 heated to 300 to 500 ° C. can be pressed to deform and connect the protrusion 18.

  When each box 4 connected in a belt shape is wound around the outer peripheral surface of the well 5, an adhesive is applied to a part or the entire surface of the bottom plate of each box 4, and each box 4 is fixed to the outer peripheral surface of the well 5. In this case, the boxes 4 are not displaced.

  In the case of the first embodiment, since the auxiliary air chamber 8 is formed by the substantially rectangular box 4, no leakage occurs in the auxiliary air chamber 8, airtightness of the auxiliary air chamber 8 is ensured, and air column resonance is achieved. In addition, the box 4 can be fixed to the rim 3 or the rim 3 assembled to the disk after the electrodeposition coating, water washing, drying, top coating, and drying processes in the manufacturing process. In addition, it is possible to make it extremely easy, and it is possible to sufficiently suppress the air column resonance without causing the appearance defect and the reduction of the air chamber volume as in the conventional case, and the box 4 is a heavy metal. Since it is made of a synthetic resin regardless of the system material, the weight can be reduced and environmental pollution can be prevented.

  In addition, each box 4 and each connecting plate 12 can be integrally formed by blow molding or the like, and it is very easy to form each box 4 and connecting plate 12, and each box 4 is wound around the well 5. Since the end portions of the box bodies 4 at both ends are connected by the joining plate 14, the attachment of each box body 4 to the well 5 can be simplified.

  And a box should just be comprised with the heat-resistant synthetic resin whose heat-deformation temperature is 180 degreeC or more and melting | fusing point is 220 degreeC or more. When the temperature of the wheel rises while the vehicle is running, especially when the usage rate of the braking device increases under the hot summer weather, the temperature of the wheel reaches 120 to 130 degrees, and it is placed in a harsh environment. By constituting with the synthetic resin, the hardness of the box is not lowered and the deformation due to softness does not occur, and the air column resonance suppression effect can be prevented from being lowered.

  In addition, an air valve 9 having an air pressure sensor 10 is attached to the gap 6a between the boxes 4, and the gap 6b between the opposing boxes 4 is provided to the valve gap 6a to which the air valve 9 is attached. Therefore, when the air valve 9 integrated with the air pressure sensor 10 is mounted, a weight balance can be ensured.

  As the synthetic resin constituting the box body 4, for example, polypropylene, polystyrene, or a composite material of carbon fiber reinforced plastic and glass fiber reinforced plastic is preferable. In the case of polyphenylene sulfite, the heat distortion temperature is 260 ° C., the melting point Is 282 ° C., the specific gravity is 1.65, is significantly lighter than ferrous metal materials, has low fuel consumption, is good for environmental pollution, and as a synthetic resin constituting the box 4 at a high temperature. On the other hand, a heat-resistant resin having a heat deformation temperature of 180 ° C. or higher and a melting point of 220 ° C. or higher is desirable so that the volume change of the auxiliary air chamber 8 does not hinder the suppression of air column resonance, and the specific gravity is 2.0 or less is preferable.

  Moreover, although Example 1 is a case where the box body 4 is four, the box body 4 is not restricted to even numbers, such as 2, 4, 6, etc., but odd numbers, such as 3, 5, 7, etc. In the case of an odd number, the gaps 6 on both sides of the opposing box 4 may be made narrower than the valve gap 6a.

  And the joining of the joining plate 14 of the one end box 4 and the other end box 4 is not limited to the ultrasonic wave, the superheater bar 20 and the like, but may be a connection by an adhesive.

  A second embodiment according to the present invention will be described with reference to FIGS. In the first embodiment, the connecting plate 12 and the joining plate 14 that connect each box 4 are integrally connected to the upper plate 13 of each box 4, but in this second embodiment, the connecting plate 12 and the joining plate are connected. 14 are integrally connected to the bottom plate 21 of each box 4, and the joining plate 14 is integrally formed on the box 4 bottom plate 21 at both ends, and the box 4 connected in a strip shape is the outer periphery of the well 5. After being wound around the surface, the end portions of both joining plates 14 are overlapped and joined and connected by ultrasonic waves, the superheated bar 20 or an adhesive.

  A third embodiment according to the present invention will be described with reference to FIG. In the first embodiment, the air pressure sensor 10 is an integrated air valve 9, but in the fourth embodiment, both are separated, and a gap between the opposing box bodies 4 with respect to the gap 6 a to which the air valve 9 is mounted. The pneumatic sensor 10 is attached to the part 6c.

  In this case, since the air valve 9 and the air pressure sensor 10 are mounted to face each other, it is easy to ensure the weight balance, and the weight balance is further stabilized by adjusting the interval between the boxes 4.

  A fourth embodiment according to the present invention will be described with reference to FIG. In the figure, a two-dot chain line indicated by reference numeral 3 is a rim having a standardized depth and width called a rim well, and a solid line reference numeral 22 indicates a rim of the fourth embodiment.

  Now, assuming that the rim diameter of the standard rim 3, that is, the diameter of the bead sheet 23 is φD, the depth of the rim well 5 is H, and the thickness is t, in Example 4, the diameter of the bottom surface of the well 5 is It is the same φD− (H + t) as that of the rim 3, and the diameter of the bead sheet 23 is φD + 1 inch, which is 1 inch larger than the normal diameter, that is, the diameter of the reference value with respect to the well diameter.

  In other words, the diameter of the bead seat 23 excluding the rim well diameter is increased by 1 inch. When the applicable rim size is 17 inches, the rim diameter, that is, the diameter of the bead seat 23 is 18 inches. After the disc 2 is fitted to 22 and a wheel is formed, and after assembly welding and painting steps, a plurality of box bodies 4 which are continuous in a belt shape are wound around the outer peripheral surface of the well 5 in the circumferential direction. The box bodies at both ends are connected by the joining plate 14. The figure shows a flat box 4 that fits the entire outer width of the well 5.

  A flat tire (not shown) is mounted on the bead seat 23, and the total dimension of the tire-equipped wheel is made to coincide with the total dimension of a normal tire mounted on the standard rim 3.

  In the case of Example 4, the well 5 has a deep groove shape with respect to the bead sheet 23, and each box body 4 can be mounted on the outer peripheral surface of the well 5 in the deep groove, and the tire bead slightly contacts the box body 4. Even if it happens, the air pressure sensor 10 mounted between each box 4 and the box 4 will not be broken or damaged.

  A fifth embodiment according to the present invention will be described with reference to FIG. The columnar communication hole 7 of the box body 4 communicating with the hollow portion of the tire to be mounted is formed by the nozzle-shaped cylindrical communication portion 24, and the communication portion 24 is on the auxiliary air chamber 8 side from the upper plate 13 of the box body 4. In other words, it is formed in the box 4, and an annular recess 25 is formed on the outer periphery of the communication portion 24, and the tip of the communication portion 24, that is, the upper end is located on the cavity side of the tire. The upper end is positioned substantially on the upper surface of the box body 4, and the communication portion 24, which is 12 mm depending on the volume of the auxiliary air chamber 8, does not protrude outward from the upper surface of the box body 4 and does not contact the tire bead. .

  When the box 4 is formed by blow molding, the communication portion 24 is formed by slightly extending the communication portion 24 forming the communication hole 7 having a predetermined length upward from the predetermined length. Is protruded from the upper surface of the box body 4, and the protruding upper end is covered with the cover 24 '. After forming, the portion protruding from the upper surface of the box body 4 is horizontally cut at the position indicated by the chain line, and communicated. The upper end of the part 24 is opened. In this case, the cutting and removal of the cover 24 ′ is simple and easy, and cutting waste is not generated and does not enter the box 4.

  Further, as shown in FIG. 14, the communication portion 24 is integrally formed from the upper plate 13 of the box body 4 into the box body 4, and the tip, that is, the lower end of the communication portion 24 is positioned in the auxiliary air chamber 8. Also good.

  When the conventional air chamber forming member is made of a metal material, a predetermined length is formed in the screw hole of the air chamber forming member 26 to form a communication hole having a predetermined length, as shown in FIG. The communication portion 24 having the communication hole 7 must be screwed together or the communication portion 24 must be welded to the through-hole of the air chamber forming member 26, and the formation of the communication hole 7 is extremely complicated and difficult. In this case, it is very easy to form the communication hole 7 having a predetermined length.

[Experimental example]
(Invention Example) A wheel was manufactured by assembling a disk on a 17 × 7 JJ rim whose diameter of the bead sheet of Example 4 was increased by 1 inch, followed by washing, surface treatment, electrodeposition coating, drying, and overcoating and drying. Thereafter, four box bodies made of synthetic resin that are continuous in the shape of the belt are wound around the outer peripheral surface of the rim, and the box bodies at both ends are connected by a joining plate. The total volume of the auxiliary air chambers of the four boxes is 1000 cm ³ .

(Comparative Example 1) A normal wheel of 17 × 7 JJ which has no processing or auxiliary air chamber.
(Comparative Example 2) A wheel in which a plate member made of iron material having a thickness of 2 mm described in Patent Document 1 is fixed to an outer periphery of a well of a rim with an adhesive, and four air chambers are formed by providing partition walls. The volume of the air chamber is almost the same as that of the invention example, and after the air chamber is formed, electrodeposition coating and top coating are performed.
(Comparative Example 3) A wheel in which a part of a plate-like member is fixed by welding in Comparative Example 2.
(Comparative Example 4) A wheel in which the entire circumference of the plate-like member is fixed by welding in Comparative Example 3.

(Experiment 1) The weight was measured.
(Experiment 2) and a wheel suspended vibrated tire tread portion in the impact hammer, the accelerometer attached to the disc flat surface portion, the magnitude of the transfer function of the sharp peak that occurs in the range of 200～300H _Z Was measured.

(Experiment 3) The size of the transfer function similar to that in Experiment 2 was measured after rotating 1.5 million times with an experimental rotator that actually assumed a rough road.
(Experiment 4) The incidence of paint appearance defects was investigated.
(Evaluation) See Table 1

  (Evaluation 1) The weight of Experiment 1 is only 8.6% increase of 1.12 Kg in the invention example as compared with the normal Comparative Example 1, but in Comparative Example 2, it is 16.3% of 2.13 Kg. Increase, in Comparative Example 3, increased by 17.8% of 2.33 kg, in Comparative Example 4, increased by 20.1% of 2.63 kg, and the inventive example was 7.1% of Comparative Example 2 {( 15.22-14.21) ÷ 14.21}, 8.5% for Comparative Example 3 and 10.6% for Comparative Example 4.

  (Evaluation 2) Regarding the transfer function of Experiment 2, as compared with −18 of Comparative Example 1, the numerical value of the invention example and Comparative Example 2 and Comparative Example 4 is −42, and that of Comparative Example 3 is −38.

  (Evaluation 3) With regard to the transfer function of Experiment 3, the invention example and the fixation of Comparative Example 4 of all-around welding are good at −42, but the adhesion of Comparative Example 2 of the adhesive is −18 which is equivalent to that of Comparative Example 1. In Comparative Example 3 of partial welding, -20 is shown, which is ineffective in suppressing air column resonance. This is because the member forming the air chamber is fixed by an adhesive and partial welding, and the air chamber loses airtightness during the experiment.

  (Evaluation 4) The coating appearance is good in the invention example and the comparative example 1, but in the comparative examples 2, 3, and 4, the occurrence rate of defective coating appearance is 20%, 80%, and 40%. Since the electrodeposition coating and overcoating are performed after assembling, the secondary dripping is caused.

  (Overview) As described above, the invention examples are extremely good in terms of weight, air column resonance suppression, and coating appearance.

It is a partial cutaway side view of Example 1 concerning the present invention. It is a front view which shows arrangement | positioning of the box of FIG. FIG. 3 is a partial cutaway side view of FIG. 2. It is a front view which shows the connection state of the box of FIG. FIG. 5 is a partially developed plan view of FIG. 4. FIG. 6 is a cut side view of FIG. 5. It is a front view which shows the coupling | bonding means of the box of FIG. It is a front view which shows the other coupling means of the box of FIG. It is a front view which shows the connection state of the box of Example 2 concerning this invention. FIG. 10 is an enlarged view of a part of FIG. 9. It is a front view which shows arrangement | positioning of the box of Example 3 concerning this invention. It is a partial cutaway side view of Example 4 concerning the present invention. A, B, and C are a cut front view, a plan view, and a production description of a part of the box body according to the fifth embodiment of the present invention. FIG. 14 is a cut front view showing another example of FIG. 13. It is a cutting | disconnection front view of the comparative example of FIG. 13, FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle wheel 2 Disc 3 Rim 4 Box 5 Well 6 Cavity 7 Communication hole 8 Auxiliary air chamber 9 Air valve 10 Air pressure sensor 12 Connection plate 14 Joint plate 23 Bead sheet 24 Communication portion

Claims (7)

In a vehicle wheel comprising a plurality of auxiliary air chambers formed in a disk and a rim and having a communication hole communicating with a hollow portion of a tire to be mounted in a circumferential direction on a well outer peripheral surface of the rim,
Each auxiliary air chamber is formed of a substantially rectangular synthetic resin box, the boxes are connected by a connecting plate, and are annularly arranged on the outer peripheral surface of the well. Wheel. 2. The vehicle wheel according to claim 1, wherein the box is made of a heat-resistant synthetic resin having a heat distortion temperature of 180 ° C. or higher and a melting point of 220 ° C. or higher. A plurality of boxes are continuously formed integrally with a connecting plate in a band shape, the connected boxes are wound around the outer peripheral surface of a rim, and the boxes at both ends are wound. The vehicle wheel according to claim 1, wherein end portions of the two are connected by a joining plate. Attach an air valve that injects air into the tire, equipped with an air pressure sensor that detects the tire air pressure in the gap between the boxes,
4. The vehicle wheel according to claim 1, wherein a gap between the opposing box bodies is narrowed with respect to a valve gap where the air valve is mounted. 5. Install an air valve that injects air into the tire in the space between the boxes,
The air pressure sensor for detecting tire air pressure is attached to the air gap between the opposing boxes on the valve air gap on which the air valve is attached. Vehicle wheel. The bead seat diameter of the rim is increased by 1 inch from the reference diameter relative to the well diameter, and a flat tire is attached to the bead seat having the increased bead seat diameter. The vehicle wheel according to claim 4 or claim 5. The vehicle wheel according to claim 1, wherein the communication hole is formed by a nozzle-shaped communication portion, and the communication portion is formed in the box body from an upper surface of the box body.

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