JP2010095103A - Vehicle wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle wheel enabling improvement in mass productivity. <P>SOLUTION: A projection part 22 projecting slightly upward and formed in a longitudinal sectional substantially T shape, is arranged in a well part 14c of the rim 14, and a cross-sectional substantially T-shaped recessed part 30 extending in the longitudinal direction and composed of a shape corresponding to the longitudinal sectional substantially T-shaped projection part 22, is formed on a bottom part of a body part 28 of a sub-air chamber member 24. In this case, the projection part 22 and the recessed part 30 are engaged with each other, and the recessed part 30 is elastically deformed and expanded by pressing (pressurizing) the sub-air chamber member 24 toward the well part 14c side, and the sub-air chamber member 24 is installed on an outer peripheral surface of the rim 14 by fitting the projection part 22 formed in a longitudinal sectional substantially T shape in the recessed part 30 of the sub-air chamber member 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle wheel that reduces noise associated with air column resonance (cavity resonance) in a tire air chamber.

  In general, it is known that air column resonance generated in a tire air chamber (hereinafter referred to as “tire air chamber”) causes road noise of an automobile. The air column resonance is a phenomenon in which random vibration transmitted from the road surface to the tire vibrates the air in the tire air chamber, and as a result, a resonance phenomenon occurs near the air column resonance frequency of the tire air chamber and a resonance sound is generated. Say.

For example, Patent Document 1 discloses a vehicle wheel for reducing noise associated with air column resonance. The vehicle wheel has a plurality of auxiliary air chambers along the circumferential direction of the rim. More specifically, this vehicle wheel is formed between an annular vertical wall standing on the well portion so as to extend in the circumferential direction of the rim and a rising side wall of the well portion facing the bead seat portion side. The annular space portion is closed with a lid member. Each sub air chamber is formed by partitioning a space portion defined by the lid member, the well portion, and the vertical wall with a plurality of partition walls arranged at predetermined intervals in the circumferential direction. Further, the tire air chamber and each sub air chamber communicate with each other through a communication hole formed in the lid member. According to this vehicle wheel, the communication hole and the auxiliary air chamber constitute a Helmholtz resonator, and air column resonance noise in the tire air chamber can be reduced.
Japanese Patent No. 3992566

  However, the vehicle wheel according to the prior art disclosed in Patent Document 1 cannot be said to have a realistic structure. That is, it is necessary to join a plurality of partition walls and a lid member to a wheel formed with a vertical wall so as to rise from the well portion, with high accuracy by welding, bonding, fitting, and fastening while maintaining airtightness. In view of ensuring the performance and increasing the number of manufacturing steps and manufacturing cost, there is a problem that it is not suitable for mass production.

  This invention is made | formed in view of the said point, and it aims at providing the vehicle wheel which can improve mass-productivity.

  To achieve the above object, the present invention provides a vehicle wheel in which a sub air chamber member is disposed in a tire air chamber, wherein the sub air chamber member includes a sub air chamber formed therein, The auxiliary air chamber has a communication hole for communicating with the tire air chamber, and is fitted into the outer peripheral surface of the rim by utilizing elastic deformation of the auxiliary air chamber member.

  According to the present invention, the auxiliary air chamber member can be easily attached by fitting the auxiliary air chamber member to the outer peripheral surface of the rim using the elastic deformation of the auxiliary air chamber member. For this reason, like a conventional vehicle wheel (for example, see Patent Document 1), a plurality of partition walls and lid members are sequentially assembled to the rim, and these are combined with high accuracy while considering airtightness to form a sub air chamber. Unlike what is to be done, in the present invention, the auxiliary air chamber member having the auxiliary air chamber can be simply manufactured by simply fitting it into the outer peripheral surface of the rim using elastic deformation. As a result, in the present invention, compared to a conventional vehicle wheel (see, for example, Patent Document 1), the number of manufacturing steps and the manufacturing cost can be reduced, and the mass productivity can be improved.

  Further, according to the present invention, the ridge is formed on the outer peripheral surface of the rim, the concave portion having a shape corresponding to the ridge portion is formed in the auxiliary air chamber member, and the auxiliary air chamber member is elastic in the concave portion. It can be simply manufactured by being deformed and fitted into the protrusion. For example, with respect to the ridge portion of the rim made of a metal material, for example, the concave portion of the auxiliary air chamber member made of a resin material is elastically deformed and expanded, and the ridge portion is inserted (loaded, loaded) into the concave portion By attaching), the auxiliary air chamber member can be easily fixed to the rim.

  Furthermore, according to the present invention, a ridge is formed on the auxiliary air chamber member, a recess having a shape corresponding to the ridge is formed on the outer peripheral surface of the rim, and the ridge is elastically deformed to By being fitted into the recess, it can be easily manufactured. For example, the ridge portion of the sub-air chamber member made of a resin material is elastically deformed and bent, and the ridge portion is inserted (loaded, mounted) into the concave portion of the rim made of a metal material, so that the rim On the other hand, the auxiliary air chamber member can be easily fixed.

  Furthermore, according to the present invention, a recess is formed in a portion facing the tire air chamber near the bead seat portion on the outer peripheral surface of the rim, and the auxiliary air chamber member is elastically deformed so as to be fitted into the recess. By comprising, it can manufacture simply.

  According to the vehicle wheel of the present invention, since the auxiliary air chamber member having the auxiliary air chamber is fitted in advance using elasticity, the vehicle wheel can be easily mounted on the outer peripheral surface of the wheel. Compared with the wheel, it is possible to reduce the number of manufacturing steps and the manufacturing cost, and to improve the mass productivity.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a perspective view of a vehicle wheel according to the first embodiment of the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of a main part of a wheel in which a tire is mounted on the vehicle wheel of FIG.

  The vehicle wheel of the present invention is mainly characterized in that an auxiliary air chamber member (Helmholtz resonator) is fitted and fitted to the outer peripheral surface side of the rim using elastic deformation. Here, after first describing the overall configuration of the vehicle wheel, the configuration of the auxiliary air chamber member will be described.

  As shown in FIG. 1, a vehicle wheel 10 according to the first embodiment includes a rim 14 for mounting a tire 12 (see FIG. 2), and a disk 16 for connecting the rim 14 to a hub (not shown). And an auxiliary air chamber member 24 that is elastically deformed and is mounted on the outer peripheral surface side of the rim 14.

  As shown in FIG. 2, the rim 14 includes a bead sheet portion 14a formed at both ends in the width direction, a rim flange portion 14b formed by bending outward from the bead sheet portion 14a, A well portion 14c is formed between the bead sheet portions 14a and 14a so as to be recessed inward in the radial direction. In this case, the outer peripheral surface of the rim 14 is constituted by an outer surface including a bead seat portion 14a, a rim flange portion 14b, a hump portion (not shown), and a well portion 14c.

  A bead portion 12a of a tire 12 is attached to the bead seat portion 14c. As a result, a tire air chamber 20 formed of an annular sealed space is formed between the rim 14 and the inner peripheral surface of the tire 12.

  The well portion 14 c is provided to drop the bead portion 12 a of the tire 12 when the tire 12 is assembled to the rim 14. As shown in FIG. 2 and FIG. 4, a ridge portion 22 that slightly protrudes upward and has a substantially T-shaped longitudinal section is provided in a substantially central portion along the width direction of the well portion 14 c. It is done. The protrusions 22 may be formed in an arc shape extending a predetermined length along the outer peripheral surface of the rim 14, or may be formed discontinuously along the outer peripheral surface of the rim 14 at predetermined intervals. . As will be described later, the protruding portion 14 is provided with an elastically deformed sub-air chamber member 24 fitted therein to lock (hold) the sub-air chamber member 24 at a predetermined position.

  For example, when the rim 14 is cast, the protrusion 22 is formed integrally with the well 14c, or after forming an annular protrusion having a rectangular cross section (not shown) in the well 14c, the annular protrusion The cross section may be formed to have a substantially T-shaped cross section.

  As shown in FIG. 2, the disk 16 is continuously formed radially inward from the end of the rim 14 on the vehicle outer side. The rim 14 and the disk 16 are manufactured from, for example, a lightweight high-strength material such as an aluminum alloy or a magnesium alloy. In addition, it is not limited to these materials, You may form from steel (steel) etc. The vehicle wheel 10 may be a spoke wheel.

  Next, the auxiliary air chamber member will be described. FIG. 3A is an enlarged longitudinal sectional view of the auxiliary air chamber member mounted on the outer peripheral surface of the rim, and FIG. 3B is an explanation showing a state in which the auxiliary air chamber member is elastically deformed when the auxiliary air chamber member is mounted. FIG. 4 and FIG. 4 are partial cross-sectional perspective views showing a state in which the auxiliary air chamber member is fitted into a protrusion provided on the outer peripheral surface of the rim.

  As shown in FIG. 3A and FIG. 4, the auxiliary air chamber member 24 is a member formed in an elongated shape along one direction arranged along the circumferential direction of the well portion 14 c. A sub air chamber 26 is provided inside. And the four sub air chamber members 24 in 1st Embodiment are arrange | positioned at substantially equal intervals along the surrounding surface of the well part 14c. That is, the vehicle wheel 10 according to the first embodiment includes two sets of a pair of auxiliary air chamber members 24 that face each other across the center of the rim 14 (hereinafter referred to as the rim center). In this case, it is preferable that the auxiliary air chamber member 24 is set at a central angle within 90 degrees along the circumferential direction from the rim center. The number of the auxiliary air chamber members 24 is preferably four, but may be three or two.

  As shown in FIGS. 3A and 4, the auxiliary air chamber member 24 extends along the outer peripheral surface of the well portion 14 c (rim 14) and curves along the longitudinal direction. Is formed. The sub-air chamber member 24 has a main body portion 28 in which a sub-air chamber 26 is formed, and the bottom surface of the main body portion 28 extends in the longitudinal direction and has a substantially T-shaped protrusion. A recess 30 having a shape corresponding to 22 and having a substantially T-shaped cross section is formed.

  The concave portion 30 is configured by a narrow rectangular opening and a wide rectangular hole continuous with the opening as viewed in a longitudinal section.

  Further, as shown in FIG. 2, the auxiliary air chamber member 24 has a protrusion 32 that protrudes from the main body 28 by a predetermined length in a direction substantially orthogonal to the rotation direction of the wheel (wheel main body). The projecting portion 32 extends toward the bead sheet portion 14 a and is positioned by being fitted into an engaging portion (not shown) that is bulged and formed in the well portion 14 c, and the circumferential direction of the auxiliary air chamber member 24. It has a function to prevent rotation. The projecting portion 32 is formed in a hollow tubular shape, and a communication hole 34 for communicating the auxiliary air chamber 26 and the tire air chamber 20 is formed.

  The shape of the auxiliary air chamber 26 formed inside the auxiliary air chamber member 24 is not particularly limited, but a flat shape is preferable when viewed in a longitudinal section. Further, the volume of the auxiliary air chamber 26 is preferably about 50 to 250 cc, for example. By setting the volume of the auxiliary air chamber 26 within this range, the auxiliary air chamber member 24 can achieve a weight reduction by suppressing an increase in weight while sufficiently exhibiting a silencing effect. be able to. Further, the length of the auxiliary air chamber member 24 along the circumferential direction is set to the same length as the circumferential length of the rim 14, and is appropriately determined in consideration of the adjustment of the weight of the vehicle wheel 10 and the assembling property with respect to the well portion 14c. Set to

  The cross-sectional shape of the communication hole 34 is not particularly limited, and may be any of, for example, a circle, an ellipse, a polygon, and a tunnel shape. The diameter of the communication hole 34 is preferably 5 mm or more when the cross section is circular. Further, the communication hole 34 having a cross-sectional shape other than a circle preferably has a diameter of 5 mm or more in terms of a cross-sectional area converted to a circle having the same cross-sectional area.

  The length of the communication hole 34 may be set so as to satisfy the expression for obtaining the resonance frequency of the Helmholtz resonator represented by the following (Expression 1).

f ₀ = C / 2π × √ (S / V (L + α × √S)) (Expression 1)
However,
f ₀ (Hz): resonance frequency C (m / s): sound velocity inside the auxiliary air chamber 26 (= sound velocity inside the tire air chamber 20)
V (m ³ ): volume of the auxiliary air chamber 26 L (m): length of the communication hole 34 S (m ² ): sectional area of the opening of the communication hole 34 α: correction coefficient

The resonance frequency f ₀ (Hz) is matched with the resonance frequency of the tire air chamber 20. At that time, the resonance frequencies of the sub air chamber members 24 composed of a total of four may be set to be the same or different from each other. Specifically, when two resonance frequencies (f ₁ , f ₂ ) are recognized as the resonance frequencies of the tire air chamber 20, the resonance frequencies f ₀ of the four auxiliary air chamber members 24 are set to (f ₁ + f ₂ ) / 2 can be set. Further, the resonance frequency f ₀ of the additional air chamber member 24 of a pair of opposite sides of the rim center is set to f _1, setting the resonance frequency f ₀ of the other pair of sub air chamber member 24 to f ₂ You can also.

  The material of the sub air chamber member 24 may be any material having elasticity such as synthetic resin or rubber. Further, considering various factors such as weight reduction of the auxiliary air chamber member 24, improvement of mass productivity, reduction of manufacturing cost, and securing of the airtightness of the auxiliary air chamber 26, lightweight and highly rigid blow molding is possible and elastic. For example, polypropylene that is resistant to repeated bending fatigue is preferable.

  The vehicle wheel 10 according to the first embodiment is basically configured as described above. Next, the function and effect will be described.

  The vehicle wheel 10 according to the first embodiment is constructed with high accuracy while considering airtightness by sequentially assembling a plurality of partition walls and lid members on the rim as in a conventional vehicle wheel (see, for example, Patent Document 1). Unlike the case where the auxiliary air chamber is formed by combining the two, the auxiliary air chamber member 24 having the auxiliary air chamber 26 is manufactured by simply fitting it into the outer peripheral surface of the rim 14 using elastic deformation. The

  That is, in the vehicle wheel 10 according to the first embodiment, the concave portion 30 formed on the bottom surface of the auxiliary air chamber member 24 is engaged with the ridge portion 22 formed on the top surface of the well portion 14c (rim 14). When the auxiliary air chamber member 24 is pressed (pressurized) toward the well portion 14c, the concave portion 30 is elastically deformed and expanded, and the ridge portion 22 having a substantially T-shaped cross section is formed. The auxiliary air chamber member 24 is fitted into the recess 30. Thus, for example, the protrusion 22 made of a metal material is inserted (loaded, mounted) into the recess 30 of the auxiliary air chamber member 24 made of, for example, a resin material using elastic deformation. Thus, the auxiliary air chamber member 24 is fixed to the rim 14.

  In addition, when the protrusion 22 of the well portion 14c is fitted (inserted) into the recess 30 of the sub air chamber member 24, the center portion along the longitudinal direction of the sub air chamber member 24 is sequentially moved toward both ends. Alternatively, the auxiliary air chamber member 24 may be pressed and fitted uniformly with the jig using a curved jig (not shown) corresponding to the shape of the auxiliary air chamber member 24. You may make it fit.

  Therefore, the vehicle wheel 10 according to the first embodiment can reduce the number of manufacturing steps and the manufacturing cost and improve the mass productivity as compared with the conventional vehicle wheel (see, for example, Patent Document 1). Can do. In addition, unlike the conventional vehicle wheel, the vehicle wheel 10 according to the first embodiment does not require special consideration for securing the airtightness of the auxiliary air chamber 26, so that the quality of the silencing performance is stable. Can be achieved.

  In addition, the vehicle wheel 10 according to the first embodiment confirms and corrects the resonance frequency in the auxiliary air chamber member 24 itself before the auxiliary air chamber member 24 is fitted into the outer peripheral surface of the rim 14 using elastic deformation. Therefore, the product yield in the auxiliary air chamber member 24 can be improved.

  FIG. 5A is an enlarged vertical sectional view of a sub air chamber member constituting a vehicle wheel according to a first modification of the first embodiment, and FIG. 5B is the sub air chamber of FIG. FIG. 5C is a partial cross-sectional perspective view showing the communication hole formed in the auxiliary air chamber member. FIG. 5C is a diagram illustrating a state in which the member is elastically deformed and fitted into the protrusion.

  In the vehicle wheel 10 shown in FIGS. 1 to 4, the protrusion 22 provided on the well portion 14 c side of the wheel is illustrated as having a substantially T-shaped cross section, but is not limited thereto. For example, as shown in the first modification of FIGS. 5A and 5B, a pair of substantially L-shaped cross sections that are spaced apart by a predetermined distance along the width direction of the rim 14 (well portion 14c). Ridges 22a, 22a, and a recess 30a having a bowl-shaped cross-section into which the substantially L-shaped ridges 22a, 22a are fitted on both sides along the width direction of the auxiliary air chamber member 24, 30a may be provided.

  FIG. 6A is an enlarged vertical sectional view of a sub air chamber member constituting a vehicle wheel according to a second modification of the first embodiment, and FIG. 6B is the sub air of FIG. 6A. It is explanatory drawing which shows the state which a chamber member elastically deforms and is fitted by a protrusion part.

  As shown in the second modification of FIGS. 6A and 6B, the protrusion 22b protruding upward from the well portion 14c is formed in a sawtooth shape, and the inner wall of the recess 30b is formed in the sawtooth shape in the cross section. When the vehicle wheel 10 is rotated by forming a corresponding saw-like portion and utilizing the elastic deformation of the concave portion 30b, the ridge 22b is caused by the saw-like portion of the concave portion 30b when the vehicle wheel 10 rotates. It is securely locked and the retaining function is exhibited.

  In addition, you may provide the protrusion part 32 in which the communicating hole 34 was formed in the one end part along the longitudinal direction of the sub air chamber member 24 so that it may extend along the circumferential direction, or FIG. ), The communication hole 34 may be provided by cutting out a part of the upper surface of the main body 28 of the auxiliary air chamber member 24.

  Next, the vehicle wheel which concerns on 2nd Embodiment of this invention is shown in FIGS. In the embodiment described below, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 7A is an enlarged vertical sectional view of a sub air chamber member constituting the vehicle wheel according to the second embodiment, and FIG. 7B is a protrusion of the sub air chamber member of FIG. 7A. FIG. 7C is a partial cross-sectional perspective view showing a state in which the auxiliary air chamber member is attached to the outer peripheral surface of the rim.

  In the second embodiment, a protrusion 22c that protrudes downward is formed on the bottom surface of the auxiliary air chamber member 24, and the protrusion 22c is formed by utilizing elastic deformation of the protrusion 22c. The recessed portion 30c to be fitted is different from the first embodiment in that the recessed portion 30c is formed on the upper surface of the wheel well portion 14c (rim 14).

  In this case, as shown in FIG. 7, the protrusion 22c has a solid shape and an arrow shape (↓) with a downward cross section, and a recess 30c having a narrow long groove is formed in the well portion 14c of the wheel. The auxiliary air chamber member 24 is fixed to the rim 14 by fitting the protrusion 22c into the recess 30c using elastic deformation of the protrusion 22c of the chamber member 24.

  The concave portion 30c formed of a narrow long groove formed in the wheel is formed, for example, by bending at substantially the same time when the rim 14 is manufactured by extrusion molding, or machined on the upper surface of the rim 14. May be formed.

  FIG. 8A is an enlarged vertical cross-sectional view of a sub air chamber member constituting the vehicle wheel according to the first modification of the second embodiment, and FIG. 8B is the sub air of FIG. 8A. FIG. 9 is a partial cross-sectional perspective view showing a state in which the protrusions of FIG. 7A are discontinuously spaced apart from each other by a predetermined interval. FIG.

  Further, as shown in the first modified example of FIG. 8, the protrusion 22d has a hollow shape communicating with the auxiliary air chamber 26 of the main body 28, and is engaged with a recess 30d having a rectangular longitudinal section formed on the wheel side. A mating engagement portion 36 may be provided on the protrusion 22d. In this case, the hollow engaging portion 36 formed in the protruding portion 22d is reduced in diameter and elastically deformed, whereby the protruding portion 22d is fitted in the recess 30d on the wheel side.

  The protrusions 22c (22d) formed in the auxiliary air chamber member 24 are formed so as to be continuous along the longitudinal direction of the main body 28, or as shown in FIG. It may be formed so as to be divided in a discontinuous manner. Other functions and effects are the same as those of the first embodiment, and thus detailed description thereof is omitted.

  Next, a plurality of configuration examples according to the third embodiment of the present invention are shown in FIGS. FIG. 10 is a partial cross-sectional view of a vehicle wheel according to a first configuration example of the third embodiment, FIG. 11 is a partial cross-sectional view of a vehicle wheel according to a second configuration example of the third embodiment, and FIG. FIG. 13A is a partial sectional view of a vehicle wheel according to a third configuration example of the third embodiment, FIG. 13A is a partial sectional view of a vehicle wheel according to the fourth configuration example of the third embodiment, and FIG. FIG. 13 is a partial cross-sectional view showing a communication hole formed in the auxiliary air chamber member of FIG. 13A, and FIG. 14 is a partial cross-sectional view of a vehicle wheel according to a fifth configuration example of the third embodiment.

  In the third embodiment, the sub air chamber is located in a portion facing the tire air chamber 20 surrounded by the tire 12 and the wheel (wheel main body) and adjacent to the well portion 14c (a portion near the bead seat portion 14a). It differs from 1st Embodiment and 2nd Embodiment by the point by which the member 24 is arrange | positioned (refer FIG. 2).

  In the first configuration example of the third embodiment, as shown in FIG. 10, a rectangular cross section inclined at a predetermined angle with respect to a vertical line on the lower side of one bead seat portion 14 a on the disk 16 side (outside of the wheel). A concave portion 30e having a shape is formed, and a sub-air chamber member 24 having a hollow rectangular shape corresponding to the rectangular concave portion 30e is fitted using the elastic deformation thereof.

  That is, the opening 40 of the recessed portion 30e bulges out to form a protrusion 40 that protrudes toward the inside by a predetermined length, and the auxiliary air chamber member 24 having the hollow cross-sectional rectangular shape is removed. When engaged with the stop projection 40, the side wall of the sub air chamber member 24 formed in a hollow shape is elastically deformed inward and is inserted into the back of the recess 30e.

  In the first configuration example of the third embodiment, the retaining projection 40 can be easily manufactured by, for example, integrally molding with a wheel by casting, and there is no obstacle on the well portion 14c side. Since there is no thing, the auxiliary air chamber member 24 can be easily attached along the lateral direction on the well portion 14c side, and the attaching operation of the auxiliary air chamber member 24 can be performed efficiently.

  In the second configuration example of the third embodiment, as shown in FIG. 11, a protrusion 22e having a substantially T-shaped cross section is formed on the inner wall of the recess 30f so as to extend in the circumferential direction ( A sub-air chamber member 24 having a substantially T-shaped cross section corresponding to the shape of the protrusion 22e is formed in the sub-air chamber member 24 having a hollow rectangular section. When the groove 24 is inserted from the oblique direction along the recess 30f, the groove portion 42 is elastically deformed and expanded, and the protrusion 22e having a T-shaped cross section is fitted into the groove portion 42, whereby the auxiliary air chamber member 24 is inserted. Are elastically coupled into the recess 30f.

  In the third configuration example of the third embodiment, as shown in FIG. 12, in contrast to the second configuration example, a solid ridge 22f is integrally formed on the auxiliary air chamber member 24 side. The narrow groove 44 into which the protrusion 22f is elastically deformed and fitted is formed along the circumferential direction on the inner wall side of the recess 30g.

  In the fourth configuration example of the third embodiment, as shown in FIG. 13A, the substantially flat first surface and the substantially flat second surface intersect with each other at an obtuse angle in the longitudinal section, and the first The auxiliary air chamber member 24 is formed of a hollow trihedron configured by a third surface that is a curved surface that suspends the surface and the second surface. In addition, a concave portion 30h is formed on the lower side of one bead sheet portion 14a on the disk 16 side and inclined toward the other bead sheet portion 14a, and corresponding to the shape of the sub-air chamber member 24 made of the trihedron. Yes. At the opening portion of the concave portion 30h, a protruding convex portion 40 that protrudes toward the inside by a predetermined length is bulged.

  In this case, the auxiliary air chamber member 24 made of the trihedron is slid from the lateral direction toward the concave portion 30h, so that the auxiliary air chamber member 24 is engaged with and elastically deformed with the retaining convex portion 40. By pressing the sub air chamber member 24 toward the back side of the recess 30h, the sub air chamber member 24 is fitted into the recess 30h and elastically fitted.

  As shown in FIG. 13B, a communication hole 34 may be formed on the side wall of the auxiliary air chamber member 24 facing the well portion 14c by partially cutting away the side wall.

  In the fifth configuration example of the third embodiment, as shown in FIG. 14, a recess 30i having a rectangular cross section is formed in a portion of the wheel directly below the bead seat portion 14a, and elastic deformation is performed in the recess 30i. The auxiliary air chamber member 24 having a substantially rectangular cross section is inserted by use. In this case, conversely, the auxiliary air chamber member 24 may be inserted into a recess 30i (not shown) formed in a portion of the wheel just below the bead seat portion 14a. The auxiliary air chamber member 24 is constituted by a single member formed separately from the wheel.

  Thus, the airtightness of the auxiliary air chamber 26 is improved by adopting a structure in which the auxiliary air chamber member 24 is fitted under the bead seat portion 14a inside or outside the wheel by utilizing its elastic deformation. At the same time, productivity (assembly performance) can be improved.

1 is a perspective view of a vehicle wheel according to a first embodiment of the present invention. FIG. 2 is an enlarged longitudinal sectional view of a main part of a wheel in which a tire is mounted on the vehicle wheel in FIG. 1. (A) is an enlarged longitudinal sectional view of the sub air chamber member mounted on the outer peripheral surface of the rim, and (b) is an explanatory view showing a state in which the sub air chamber member is elastically deformed when the sub air chamber member is mounted. It is a partial cross section perspective view which shows the state by which a sub air chamber member is engage | inserted with respect to the rib part provided in the outer peripheral surface of the rim | limb. (A) is an enlarged longitudinal cross-sectional view of the sub air chamber member which comprises the vehicle wheel which concerns on the 1st modification of 1st Embodiment, (b) is an elastic deformation of the said sub air chamber member of (a). Explanatory drawing which shows the state engage | inserted by a protrusion part, (c) is an enlarged longitudinal cross-sectional view which shows the communicating hole formed in the said auxiliary | assistant air chamber member. (A) is an enlarged longitudinal cross-sectional view of the sub air chamber member which comprises the vehicle wheel which concerns on the 2nd modification of 1st Embodiment, (b) is the said sub air chamber member of (a) elastically deforming. It is explanatory drawing which shows the state engage | inserted by a protrusion part. (A) is an enlarged longitudinal cross-sectional view of the sub air chamber member which comprises the vehicle wheel which concerns on 2nd Embodiment of this invention, (b) is that the protrusion of the said sub air chamber member of (a) is elastic. FIG. 4C is a partial cross-sectional perspective view showing a state in which the auxiliary air chamber member is attached to the outer peripheral surface of the rim. (A) is an expanded longitudinal cross-sectional view of the sub air chamber member which comprises the vehicle wheel which concerns on the 1st modification of 2nd Embodiment of this invention, (b) is the said sub air chamber member of (a). It is explanatory drawing which shows the state which a protrusion part elastically deforms and is engage | inserted by a recessed part. It is a partial cross section perspective view which shows the state which made the protrusion of FIG. It is a fragmentary sectional view of the wheel for vehicles concerning the 1st example of composition of a 3rd embodiment of the present invention. It is a fragmentary sectional view of the vehicle wheel concerning the 2nd example of composition of the 3rd embodiment. It is a fragmentary sectional view of the wheel for vehicles concerning the example of the 3rd composition of the 3rd embodiment. (A) is a fragmentary sectional view of the vehicle wheel which concerns on the 4th structural example of 3rd Embodiment, (b) is a part which shows the state by which the communicating hole was formed in the sub air chamber member shown by (a) It is sectional drawing. It is a fragmentary sectional view of the wheel for vehicles concerning the 5th example of composition of the 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle wheel 12 Tire 14 Rim 14a Bead seat part 14c Well part 20 Tire air chamber 22, 22a-22f Projection part 24 Sub air chamber member 26 Sub air chamber 30, 30a-30i Concave part 34 Communication hole

Claims (4)

A vehicle wheel in which a sub air chamber member is disposed in a tire air chamber,
The auxiliary air chamber member has an auxiliary air chamber formed therein, a communication hole for communicating the auxiliary air chamber and the tire air chamber, and uses the elastic deformation of the auxiliary air chamber member to A vehicle wheel characterized by being fitted into an outer peripheral surface. The vehicle wheel according to claim 1,
A protrusion is formed on the outer peripheral surface of the rim, and a concave portion having a shape corresponding to the protrusion is formed in the auxiliary air chamber member, and the auxiliary air chamber member is elastically deformed in the concave portion. The vehicle wheel is fitted into the protrusion. The vehicle wheel according to claim 1,
A protrusion is formed on the auxiliary air chamber member, and a recess having a shape corresponding to the protrusion is formed on the outer peripheral surface of the rim, and the protrusion is elastically deformed and fitted into the recess. A vehicle wheel characterized by the above. The vehicle wheel according to claim 1,
A concave portion is formed in a portion facing the tire air chamber near the bead seat portion on the outer peripheral surface of the rim, and the sub air chamber member is fitted into the concave portion by elastic deformation. Vehicle wheel.

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