JP2019199094A - Wheel for vehicle and method of manufacturing the same - Google Patents

Abstract

To reduce cost of manufacture of a rim to which a Helmholtz resonator is attached more remarkably than the conventional way.SOLUTION: A wheel for vehicle 1 comprises an auxiliary air chamber member 10 (Helmholtz resonator) integrally molded on an outer peripheral surface 11d of a well part 11c of the rim by gas assist injection molding. The wheel for vehicle 1 does not require a standing wall for attaching the auxiliary air chamber member 10 unlike conventional wheel for vehicle and there are performed simultaneously molding the auxiliary air chamber member 10, positioning the auxiliary air chamber member 10, and bonding to the outer peripheral surface 11d of the auxiliary air chamber member 10.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a vehicle wheel and a manufacturing method thereof.

  Conventionally, a vehicle wheel having a Helmholtz resonator on the outer peripheral surface of a well portion of a rim is known (for example, see Patent Document 1). In the vehicle wheel of Patent Document 1, a standing wall is formed so as to extend in the wheel circumferential direction on the outer peripheral surface of the well portion, and the Helmholtz resonator is configured to be locked to the standing wall. According to such a vehicle wheel, the Helmholtz resonator can be easily attached to the rim.

JP 2012-45971 A

  However, in the conventional vehicle wheel (see, for example, Patent Document 1), the above-mentioned standing wall must be separately formed over the entire circumference of the rim in the circumferential direction of the rim, so that the rim manufacturing process becomes complicated. Thus, there is a problem that the manufacturing cost increases.

  The subject of this invention is providing the vehicle wheel which can reduce the manufacturing cost of the rim | limb which mounts a Helmholtz resonator markedly more than before.

The vehicle wheel according to the present invention that achieves the above-described object includes a Helmholtz resonator integrally formed on the surface of the rim.
Further, the vehicle wheel manufacturing method of the present invention includes a step of disposing the wheel in a mold integrally formed by an outer shape formed by the wheel and a Helmholtz resonator attached to the rim of the wheel, and the Helmholtz And a step of injecting a molten resin into the inner space of the mold shaped like an outer shape of a resonator, and a step of integrally forming the Helmholtz resonator with respect to the rim by the molten resin injected into the mold. It is characterized by.

  According to the vehicle wheel of the present invention, the manufacturing cost of the rim to which the Helmholtz resonator is attached can be significantly reduced as compared with the conventional one.

1 is a perspective view of a vehicle wheel according to an embodiment of the present invention. It is a whole perspective view of a Helmholtz resonator (sub-air chamber member). FIG. 3 is a sectional view taken along line III-III in FIG. 1. FIG. 4 is a front view of a Helmholtz resonator (sub-air chamber member) viewed from the direction of arrow IV in FIG. 1. It is explanatory drawing of the laser etching surface formed in the outer peripheral surface of a well part. It is explanatory drawing of the anchor hole formed in the outer peripheral surface of a well part. (A) And (b) is a manufacturing process explanatory view of the wheel for vehicles concerning the embodiment of the present invention. (A) to (c) is a manufacturing process explanatory diagram of a vehicle wheel according to an embodiment of the present invention. It is a disassembled perspective view of the sub air chamber member which comprises the vehicle wheel which concerns on a modification. It is a fragmentary sectional view of the wheel for vehicles concerning a modification. (A) to (c) is a manufacturing process explanatory view of a vehicle wheel according to a modification.

Next, a vehicle wheel according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, “X” indicates the wheel circumferential direction, “Y” indicates the wheel width direction, and “Z” indicates the wheel radial direction.
Below, after explaining the whole structure of the vehicle wheel first, the sub air chamber member as a Helmholtz resonator and the manufacturing method of the wheel for vehicles are demonstrated.

<Overall configuration of vehicle wheel>
FIG. 1 is a perspective view of a vehicle wheel 1 according to an embodiment of the present invention.
As shown in FIG. 1, a vehicle wheel 1 according to the present embodiment includes a rim 11 made of a metal such as an aluminum alloy or a magnesium alloy, a sub air chamber member 10 made of a synthetic resin such as a polyamide resin (Helmholtz resonator). ) Is integrally molded.
In FIG. 1, reference numeral 12 denotes a disk for connecting the rim 11 to a hub (not shown).

  The rim 11 has well portions 11c that are recessed toward the inner side (rotation center side) in the wheel radial direction between bead sheets (not shown) formed at both ends in the wheel width direction Y, respectively. The outer peripheral surface 11d of the well portion 11c defined by the bottom surface of the recess has substantially the same diameter around the wheel axis over the wheel width direction Y.

In this embodiment, the rim 11 includes a vertical wall 15a that rises from the outer peripheral surface 11d of the well portion 11c to the rim flange side on one side (inner side) of the wheel width direction Y, and the other side of the wheel width direction Y ( And a vertical wall 15b rising from the outer peripheral surface 11d of the well portion 11c to the rim flange side.
Incidentally, on the outer peripheral surface 11d of the well portion 11c in the present embodiment, unlike the conventional vehicle wheel (see, for example, Patent Document 1 above), the wheel periphery in the middle of the wheel width direction Y of the outer peripheral surface 11d. There is no standing wall extending over the entire circumference in the direction X.

In FIG. 1, reference numeral 13 denotes a main body (resonator main body) constituting the auxiliary air chamber member 10, and reference numeral 18 denotes a tube constituting the auxiliary air chamber member 10.
Although the auxiliary air chamber members 10 are not shown in FIG. 1 for convenience of drawing, four outer peripheral surfaces 11d are arranged along the wheel circumferential direction X at equal intervals. In addition, each of the tubular bodies 18 in each auxiliary air chamber member 10 is disposed at intervals of 90 degrees around the wheel rotation axis.

<Sub-air chamber member>
Next, the auxiliary air chamber member 10 (helmholtz resonator) will be described.
FIG. 2 is an overall perspective view of the auxiliary air chamber member 10. 3 is a cross-sectional view taken along the line III-III in FIG.
As shown in FIG. 2, the auxiliary air chamber member 10 is a member that is long in one direction, and includes the main body portion 13 (resonator main body portion) and the tubular body 18.

The main body 13 is curved in the longitudinal direction. That is, the main body 13 is formed along the wheel circumferential direction X by integrally molding the auxiliary air chamber member 10 with respect to the outer peripheral surface 11d (see FIG. 1) of the well portion 11c (see FIG. 1).
The inside of the main body 13 is hollow. This hollow portion (not shown) forms a secondary air chamber SC (see FIG. 3) described later.
In FIG. 2, reference numeral 18 a is a communication hole formed inside the tube body 18. Reference numerals 25a, 25b, and 25c denote an upper portion (upper plate), a bottom portion (bottom plate), and a side portion (bottom plate) that constitute the main body 13 described below.

As shown in FIG. 3, the main body 13 has a substantially rectangular shape that is long in the wheel width direction Y in a cross-sectional view orthogonal to the longitudinal direction (the wheel circumferential direction X in FIG. 2).
Specifically, the main body 13 includes a bottom portion 25b (bottom plate) disposed along the outer peripheral surface 11d of the well portion 11c, and an upper portion 25a disposed to face the bottom portion 25b across the auxiliary air chamber SC. Top plate) and a pair of side portions 25c (side plates) that connect the bottom portion 25b and the upper portion 25a to form a substantially rectangular shape.
In FIG. 3, reference numeral 9 denotes a tire air chamber formed between the tire 11 (not shown) on the well portion 11c, reference numeral 10 denotes a sub air chamber member, and reference numeral 11 denotes a rim. Yes, reference numeral 18a is a communication hole, and reference numeral 21 is an adhesive described in detail later.

Next, the tubular body 18 (see FIG. 1) will be described.
As shown in FIG. 1, the tubular body 18 protrudes from the main body 13 in the wheel circumferential direction X at a position deviated to one side of the wheel width direction Y in the main body 13 (inside the vehicle wheel 1). Is formed.

FIG. 4 is a front view of the auxiliary air chamber member 10 (Helmholtz resonator) viewed from the direction of arrow IV in FIG.
As shown in FIG. 4, the pipe body 18 has a semi-cylindrical shape in a front view. Specifically, the tubular body 18 is formed by joining a semicircular portion 18 b disposed outside the wheel radial direction Z and a rectangular portion 18 c disposed inside the wheel radial direction Z.

Further, the lower surface 18d located inside the wheel radial direction Z of the rectangular portion 18c is flush with the bottom portion 25b in the wheel circumferential direction (direction perpendicular to the paper surface of FIG. 4).
And the communication hole 18a is exhibiting the circular shape formed so that it may straddle the semicircle part 18b and the rectangular part 18c of the tubular body 18 by front view. In FIG. 4, reference numeral 10 denotes a sub air chamber member, reference numeral 25 a denotes an upper part (upper plate), and reference numeral 25 c denotes a side part (side plate).
As shown in FIG. 3, such a communication hole 18a is formed in a tire air chamber formed between the auxiliary air chamber SC formed inside the main body portion 13 and a tire (not shown) on the well portion 11c. 9 is communicated with.

Next, the joining structure of the auxiliary air chamber member 10 (see FIG. 1) to the rim 11 (see FIG. 1) will be described.
As will be described in detail later, the auxiliary air chamber member 10 is joined to the outer peripheral surface 11d (see FIG. 1) of the well portion 11c (see FIG. 1) by being integrally formed by injection molding. That is, the sub-air chamber member 10 and the outer peripheral surface 11d are joined by the molten resin that is a forming material of the sub-air chamber member 10 solidifying on the outer peripheral surface 11d.

  As a forming material of the sub air chamber member 10 in the present embodiment, for example, a thermoplastic resin used for injection molding (injection molding) is assumed. The thermoplastic resin is not particularly limited, and among them, a polyamide resin using polyamide MXD6 as a base resin and 6 nylon are preferable.

In addition, when the auxiliary air chamber member 10 (see FIG. 1) is integrally formed on the outer peripheral surface 11d (see FIG. 1) of the well portion 11c (see FIG. 1), it is desirable to perform a primer treatment on the outer peripheral surface 11d.
Examples of the primer treatment include application of a primer (undercoat). Examples of the primer include an adhesive. When the molten resin that is the material for forming the sub air chamber member 10 comes into contact with the adhesive in the present embodiment, the metal constituting the outer peripheral surface 11d and the resin of the sub air chamber member 10 are heated by the heat of the molten resin. Promote bonding. As the adhesive in the present embodiment, an adhesive that promotes the bonding between the metal and the resin of the auxiliary air chamber member 10 at about 60 to 120 ° C. is assumed. Examples of such an adhesive include, but are not limited to, an epoxy / phenolic resin adhesive and a reactive copolymer nylon adhesive. Among these, a reactive copolymer nylon adhesive is preferable. In this reactive copolymerized nylon adhesive, the isocyanate group forms a hydrogen bond with the metal surface constituting the wheel by a thermal reaction, and the nylon resin side is fused to the auxiliary air chamber member 10 by heat.

As shown in FIG. 3, such an adhesive 21 is interposed between the outer peripheral surface 11 d of the well portion 11 c and the auxiliary air chamber member 10.
In FIG. 3, the layer made of the adhesive 21 is schematically exaggerated for convenience of drawing, and does not indicate the actual thickness. The thickness of the adhesive 21 can be set to about 2 μm to 30 μm, but is not limited thereto.

Further, the outer peripheral surface 11d of the well portion 11c for integrally molding the auxiliary air chamber member 10 (see FIG. 3) is preferably roughened. Among these, the surface on which the application surface is formed by a laser etched surface is more preferable.
FIG. 5 is an explanatory diagram of the laser etched surface 22 formed on the outer peripheral surface 11d of the well portion 11c. In FIG. 5, the code | symbol 25b is the bottom part (bottom plate) of the main-body part 13, and the code | symbol 21 is an adhesive agent.

As shown in FIG. 5, the laser etching surface 22 is composed of an etching groove 22a and a flange 22b.
The etching groove 22a in the present embodiment is formed on the outer peripheral surface 11d when, for example, a YAG laser is scanned in one direction on the outer peripheral surface 11d, and has a predetermined groove depth on the front side in FIG. It is assumed to extend from the back to the back.
In addition, the flange portion 22b in the present embodiment is formed with a predetermined height on each side in the width direction of the etching groove 22a, and extends along the extending direction of the etching groove 22a.

Such a laser etched surface 22 is formed, for example, by scanning (scanning) a YAG laser with a predetermined hatching width on the outer peripheral surface 11d. Specifically, the YAG laser pierces the etching groove 22a at a predetermined depth, and the eluate and the like at the time of the piercing are deposited and hardened on both sides of the etching groove 22a, so that the flange portion 22b having a predetermined height is formed. The
In addition, although the extending direction of the etching groove | channel 22a and the collar part 22b in this embodiment assumes what was set to the wheel circumferential direction X, it is not limited to this.

In the present embodiment, by providing such a laser etching surface 22 on the outer peripheral surface 11d of the well portion 11c, the adhesive 21 is filled in the etching groove 22a and between the flange portions 22b. Although not shown in the drawing, the laser etched surface 22 is displaced in the groove width direction of the etching groove 22a and the side surface of the flange 22b overhangs, or the tips of the flanges 22b are not connected to each other. Connected on the etching groove 22a to partially form an arch.
Thus, an anchor structure of the adhesive 21 is constructed on the laser etched surface 22 by the adhesive 21 that penetrates deeply into the etching groove 22a and the adhesive 21 that is locked to the overhang portion or the arch.

An anchor hole can also be formed on the outer peripheral surface 11d (see FIG. 3) of the well portion 11c (see FIG. 3).
FIG. 6 is an explanatory diagram of the anchor hole 41 formed in the outer peripheral surface 11d of the well portion 11c.
As shown in FIG. 6, the anchor hole 41 is formed such that the outer peripheral surface 11 d is recessed in the wheel radial direction Z.
The anchor hole 41 in this embodiment has an inner diameter 41b wider than the opening diameter 41a.
Such anchor holes can be formed by performing, for example, blasting or etching on the outer peripheral surface 11d.
Thereby, the anchor structure of the adhesive 21 is constructed by the adhesive 21 entering the anchor hole 41.
In FIG. 6, reference numeral 25 b denotes a bottom portion (bottom plate) of the main body portion 13.

<Method for manufacturing vehicle wheel>
Next, the manufacturing method of the vehicle wheel 1 (refer FIG. 1) which concerns on this embodiment is demonstrated.
7 (a) and 7 (b), and FIGS. 8 (a) to 8 (c) are explanatory diagrams of the manufacturing process of the vehicle wheel according to the embodiment of the present invention. 8A to 8C correspond to the arrow VIII portion in FIG. 7B.

  As shown to Fig.7 (a), in the manufacturing method which concerns on this embodiment, the wheel main body 1a (wheel) for providing the sub air chamber member 10 (refer FIG. 1) first is prepared. The wheel body 1a is assumed to have the same structure as that obtained by removing the auxiliary air chamber member 10 from the vehicle wheel 1 shown in FIG.

An adhesive 21 is applied to the outer peripheral surface 11d of the well portion 11c of the wheel body 1a at a location where the auxiliary air chamber member 10 (see FIG. 1) is to be provided.
Examples of the method for applying the adhesive 21 include, but are not limited to, a bar coating method, a roll coating method, a spray coating method, and a brush coating method.
Although not shown, the wheel body 1a in the present embodiment is provided with a laser etched surface 22 (see FIG. 5), an anchor hole 41 (see FIG. 6), etc. on the outer peripheral surface 11d to which the adhesive 21 is applied. Is assumed.

As shown in FIG. 7B, in the manufacturing method of the present embodiment, the wheel body 1 a to which the adhesive 21 is applied is disposed in the mold 51.
The mold 51 has an internal space 52 in which the outer shapes of the wheel main body 1a and the auxiliary air chamber member 10 (see FIG. 1) are integrally formed. Specifically, the internal space 52 is mainly configured by an internal space 52a corresponding to the external shape of the wheel body 1a and an internal space 52b corresponding to the external shape of the auxiliary air chamber member 10 (see FIG. 1). .

FIG. 7B shows a state in which the wheel body 1a is disposed in the internal space 52a, and the outer peripheral surface 11d of the well portion 11c coated with the adhesive 21 faces the internal space 52b.
Incidentally, the metal mold | die 51 in this embodiment consists of 4 pieces arrange | positioned on the outer peripheral surface of the rim | limb 11 (refer FIG. 1). Then, each piece cooperates to clamp the wheel main body 1a from the outer peripheral side, so that the internal space shaped like the outer shape of the auxiliary air chamber member 10 (see FIG. 1) is formed on the outer peripheral surface 11d of the well portion 11c. Four cavities consisting of 52b are formed.

Next, in this manufacturing method, the auxiliary air chamber member 10 (see FIG. 1) is molded in the mold 51 by injecting molten resin into the internal space 52b. Specifically, gas assist injection molding of the auxiliary air chamber member 10 (see FIG. 1) is performed on the outer peripheral surface 11d of the well portion 11c.
In the following, this manufacturing method will be described by taking gas-assisted injection molding performed in the internal space 52b shown in the arrow VIII portion of FIG. 7B among the four internal spaces 52b (cavities) in the mold 51 as an example. explain.

  As shown in FIGS. 8 (a) to 8 (c) corresponding to the arrow VIII portion of FIG. 7 (b), a molten resin supply is supplied to the mold 51 to supply the molten resin to the internal space 52b (cavity). A passage 53a, a gas supply passage 53b for supplying gas to the internal space 52b, and a vent 53c for discharging and exhausting the remaining molten resin in the internal space 52b are provided. The mold configuration around the molten resin supply path 53a and the vent 53c schematically shown in FIGS. 8A to 8C may be either a known hot runner method or a cold runner method. A hot runner method is more desirable.

  Incidentally, the molten resin supply path 53a and the gas supply path 53b in the present embodiment are the internal space at a position corresponding to the opening end portion of the pipe body 18 (see FIG. 1) of the sub air chamber member 10 (see FIG. 1). It faces 52b. Further, the vent 53c in this embodiment faces the internal space 52b at a position corresponding to the end of the auxiliary air chamber member 10 on the side opposite to the end where the tube body 18 is formed.

As shown in FIG. 8A, in this manufacturing method, the molten resin 61a is supplied into the internal space 52b by the molten resin supply path 53a. The amount of the molten resin 61a supplied is within a range in which the bottom 25b (see FIG. 3), the top 25a (see FIG. 3), and the side 25c (see FIG. 3) can be formed with a predetermined thickness. It can be set appropriately.
As the molten resin 61a is filled into the internal space 52b, the air in the internal space 52b is exhausted through the vent 53c.
In FIG. 8A, reference numeral 1a is a wheel body, reference numeral 21 is an adhesive applied to the outer peripheral surface 11d of the well portion 11c, and reference numeral 51 is a mold (hereinafter, FIG. ) And FIG. 8 (c)).

Next, as shown in FIG. 8B, the gas 61b is supplied into the internal space 52b through the gas supply path 53b.
The temperature of the gas 61b in this embodiment is set to be the same as the temperature of the molten resin 61a supplied to the internal space 52b.
As the kind of the gas 61b, so-called inert gas such as nitrogen gas and argon gas is preferable, but air may be used.

When the gas 61b is filled in the internal space 52b of the mold 51, the molten resin in the internal space 52b is pushed out to the vent 53c side, and the excess molten resin 61a is discharged through the vent 53c. The
The molten resin 61a is solidified on the inner wall of the cavity, so that a bottom portion 25b (see FIG. 3), an upper portion 25a (see FIG. 3), and a side portion 25c (see FIG. 3) having a predetermined thickness are formed. Will be formed.

In the manufacturing method of the present embodiment, the amount of the gas 61b supplied to the internal space 52b depends on the volume of the auxiliary air chamber SC (see FIG. 3) related to the Helmholtz resonator resonance frequency at the time of design and the communication hole 18a (see FIG. 2). ) And the volume of the communication hole 18a defined by the cross-sectional area.
As a result, as shown in FIG. 8C, the sub air chamber member 10 having the designed sub air chamber SC and the communication hole 18a is formed in the cavity formed by the internal space 52b.

The molten resin 61a in the internal space 52b heats the adhesive 21 with the heat. Further, even after the molten resin 61a is solidified, the adhesive 21 is heated until it falls to room temperature. As a result, the adhesive 21 promotes the coupling between the auxiliary air chamber member 10 and the outer peripheral surface 11d of the well portion 11c.
Then, the vehicle wheel 1 (see FIG. 1) in which the auxiliary air chamber member 10 is integrally formed with the wheel body 1a is taken out from the mold 51, whereby a series of steps in the method for manufacturing the vehicle wheel 1 of the present embodiment. Ends.

<Effect>
Next, the effect which the vehicle wheel 1 of this embodiment and its manufacturing method show are demonstrated.
In the vehicle wheel 1 of the present embodiment, the auxiliary air chamber member 10 (Helmholtz resonator) is integrally formed on the outer peripheral surface 11d of the well portion 11c.
Thereby, the vehicle wheel 1 can simultaneously perform the formation of the auxiliary air chamber member 10, the positioning of the auxiliary air chamber member 10 with respect to the outer peripheral surface 11d, and the bonding with respect to the outer peripheral surface 11d.
Moreover, unlike the conventional vehicle wheel (for example, refer patent document 1), the vehicle wheel 1 does not need to form the standing wall for attaching the sub air chamber member 10 to the outer peripheral surface 11d in the rim | limb 11. FIG. As a result, the vehicle wheel 1 can significantly reduce the manufacturing cost of the rim 11 as compared with the prior art. And according to this vehicle wheel 1, it is not necessary to consider the intensity | strength change of the rim | limb 11 which arises by the presence or absence of a standing wall.

  Further, in the vehicle wheel 1 of the present embodiment, the auxiliary air is provided by interposing the adhesive 21 between the outer peripheral surface 11d of the well portion 11c and the auxiliary air chamber member 10 (Helmholtz resonator). The bonding strength between the chamber member 10 and the outer peripheral surface 11d is further improved. In particular, the vehicle wheel 1 using the adhesive 21 that promotes the coupling between the outer peripheral surface 11d and the sub air chamber member 10 by the heat of the molten resin further increases the sub air chamber member 10 and the outer peripheral surface 11d. The joint strength is improved.

Further, the vehicle wheel 1 of the present embodiment includes a sub air chamber member 10 (Helmholtz resonator) that is gas-assisted injection molded.
According to such a vehicle wheel 1, the hollow portion constituting the auxiliary air chamber SC can be easily formed in the auxiliary air chamber member 10 (helmholtz resonator) without using a complicated mold 51. .

Moreover, in the vehicle wheel 1 of this embodiment, it can be set as the structure which has the anchor hole 41 in the outer peripheral surface 11d of the well part 11c.
According to such a vehicle wheel 1, the adhesive 21 can be taken into the anchor hole 41. In this vehicle wheel 1, not only adhesion but also an anchor structure becomes fail-safe by constructing mechanical engagement between the auxiliary air chamber member 10 (Helmholtz resonator) and the outer peripheral surface 11 d.
Further, as will be described later, in the vehicle wheel 1 that does not have the adhesive 21, the molten resin forming the auxiliary air chamber member 10 is taken into the anchor hole 41. Thereby, the joint strength between the outer peripheral surface 11d and the auxiliary air chamber member 10 (Helmholtz resonator) is remarkably improved.

In the vehicle wheel 1 of the present embodiment, the outer peripheral surface 11d of the well portion 11c may be configured as the laser etched surface 22.
According to such a vehicle wheel 1, the adhesive 21 is filled in the etching groove 22 a and between the flange portions 22 b. In this vehicle wheel 1, not only adhesion but also an anchor structure becomes fail-safe by constructing mechanical engagement between the auxiliary air chamber member 10 (Helmholtz resonator) and the outer peripheral surface 11 d.
Further, as will be described later, in the vehicle wheel 1 that does not have the adhesive 21, the molten resin forming the auxiliary air chamber member 10 is taken in between the etching groove 22 a and the flanges 22 b. . Thereby, the joint strength between the outer peripheral surface 11d and the auxiliary air chamber member 10 (Helmholtz resonator) is remarkably improved.

In the method for manufacturing the vehicle wheel 1 according to this embodiment, the auxiliary air chamber member 10 (Helmholtz resonator) is integrally formed on the outer peripheral surface 11d of the well portion 11c by the molten resin 61a injected into the mold 51.
According to such a manufacturing method, formation of the sub air chamber member 10, positioning of the sub air chamber member 10 with respect to the outer peripheral surface 11d, and joining to the outer peripheral surface 11d can be performed simultaneously.
Moreover, this manufacturing method does not need to form the standing wall for attaching the sub air chamber member 10 to the outer peripheral surface 11d in the rim 11, unlike a conventional vehicle wheel (see, for example, Patent Document 1). Thereby, this manufacturing method can reduce the manufacturing cost of the rim | limb 11 markedly compared with the past. And the vehicle wheel 1 obtained by this manufacturing method does not need to consider the intensity | strength change of the rim | limb 11 which arises by the presence or absence of a standing wall.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, It can implement with a various form.
In the above-described embodiment, the vehicle wheel 1 in which the entire auxiliary air chamber member 10 is integrally formed on the outer peripheral surface 11d of the well portion 11c has been described. However, in the present invention, a part of the auxiliary air chamber member 10 is used as follows. It can also be set as the structure integrally formed in 11d of outer peripheral surfaces.

  FIG. 9 is an exploded perspective view of the auxiliary air chamber member 10 constituting the vehicle wheel 1 according to the modification. FIG. 10 is a partial cross-sectional view of the vehicle wheel 1 including the auxiliary air chamber member 10 of FIG. 9, and corresponds to FIG. In FIG. 9 and FIG. 10, the same components as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As illustrated in FIG. 9, the auxiliary air chamber member 10 (Helmholtz resonator) according to the modification includes a base portion 14 and a main body portion 13 (resonator main body portion).
The base portion 14 is formed of a plate body that is curved in the longitudinal direction. The base portion 14 is formed integrally with the outer peripheral surface 11d (see FIG. 1) of the well portion 11c (see FIG. 1), so that the concave surface side is along the wheel circumferential direction X.

  At both end portions of the base portion 14 in the wheel width direction Y, plate-like edge portions 14a projecting in a hook shape outside the wheel width direction Y are extended so as to extend along the wheel circumferential direction X. The plate-like edge portion 14 a is adapted to be fitted into the fitting groove 13 a of the main body portion 13.

The main body 13 is a member that is long in one direction, and includes a cylindrical tube 18 at an end in the longitudinal direction. Inside the tubular body 18, a circular communication hole 18a is formed in a cross-sectional view.
The main body portion 13 is curved with substantially the same curvature as the base portion 14, and overlaps the convex side of the base portion 14 on the concave side.

As shown in FIG. 10, the main body 13 surrounds the sub-air chamber SC having a substantially rectangular shape in a cross-sectional view by a bottom 25b, an upper part 25a, and a side part 25c.
The auxiliary air chamber SC communicates with the tire air chamber 9 through the communication hole 18a.
Inside the wheel radial direction Z of the main body 13, the fitting grooves 13 a are formed at both ends in the wheel width direction Y.

  And the main-body part 13 is assembled | attached to the base part 14 by inserting the plate-shaped edge part 14a of the base part 14 in the insertion groove | channel 13a of the main-body part 13. FIG. That is, in the vehicle wheel 1 according to this modification, the main body portion 13 is attached to the outer peripheral surface 11d via the base portion 14 that is integrally formed with the outer peripheral surface 11d of the well portion 11c.

In the vehicle wheel 1 according to such a modification, the adhesive 21 is interposed between the outer peripheral surface 11d of the well portion 11c and the base portion 14.
In FIG. 10, the layer made of the adhesive 21 is schematically exaggerated for the convenience of drawing, and does not indicate the actual thickness. The film thickness of the adhesive 21 can be set to the same level as the film thickness of the adhesive 21 (see FIG. 3) in the above embodiment.

Next, the manufacturing method of the vehicle wheel 1 (refer FIG. 10) which concerns on a modification is demonstrated.
FIG. 11A to FIG. 11C are explanatory diagrams of manufacturing steps of the vehicle wheel 1 of FIG.
As shown in FIG. 11A, in the manufacturing method according to the modified example, the adhesive 21 is applied to a predetermined portion of the outer peripheral surface 11d of the well portion 11c of the wheel body 1a in the same manner as in the above embodiment.
Although not shown, a laser etched surface 22 (see FIG. 5), an anchor hole 41 (see FIG. 6), and the like are provided on the outer peripheral surface 11d to which the adhesive 21 is applied.

As shown in FIG. 11B, in the manufacturing method according to the modified example, the wheel body 1 a to which the adhesive 21 is applied is disposed in the mold 51.
An internal space 52c corresponding to the base portion 14 (see FIG. 10) is formed in the mold 51 in which the wheel body 1a is disposed. However, in this internal space 52c, a core (not shown) is arranged at a predetermined position in order to form a bowl-shaped plate-like edge portion 14a (see FIG. 10) in the base portion 14.
Next, in this manufacturing method, although not shown, molten resin is injected into the internal space 52c of the mold 51, and the base portion 14 (see FIG. 9) is integrally formed on the outer peripheral surface 11d.

And as shown in FIG.11 (c), the main-body part 13 is assembled | attached to each of the base part 14 of the wheel main body 1a taken out from the metal mold | die 51 (refer FIG.11 (b)). That is, as shown in FIG. 11C, the base portion 13 is slid toward the base portion 14 on the outer peripheral surface 11d, so that the base portion is inserted into the fitting groove 13a of the main portion 13 as shown in FIG. Fourteen plate-like edges 14a are fitted.
As a result, the vehicle body 1 of the modified example (see FIG. 10) is completed by assembling the main body portion 13 via the base portion 14 on the outer peripheral surface 11d of the well portion 11c. Incidentally, although the main body 13 in this modification is assumed to be a separately manufactured thermoplastic resin molded product, the main body 13 may be molded by a known method.

  In the vehicle wheel 1 of the modified example, an adhesive (not shown) is interposed between the main body portion 13 and the base portion 14, or the main body portion 13 and the base portion 14 are mechanically coupled. In addition, the main body 13 can be prevented from rotating when the vehicle wheel 1 is rotated.

  According to the vehicle wheel 1 of such a modification, since only the base portion 14 is integrally formed with the outer peripheral surface 11d, the degree of freedom in designing the main body portion 13 is further improved. In addition, since only the base portion 14 is integrally formed on the outer peripheral surface 11d, a simple apparatus that injects only the molten resin into the mold 51 can be used.

  Further, in the vehicle wheel 1 according to the embodiment and the modified example, it is assumed that the adhesive 21 (see FIGS. 3 and 10) is applied to the outer peripheral surface 11d of the well portion 11c. The adhesive 21 can be omitted. That is, in the vehicle wheel 1, the auxiliary air chamber member 10 is integrally formed directly with the outer peripheral surface 11d of the well portion 11c.

  Further, in the present invention, the auxiliary air chamber member 10 (see FIG. 3) or the base portion 14 (see FIG. 10) is integrally formed on either the vertical walls 15a, 15b or from the outer peripheral surface 11d to the vertical walls 15a, 15b. It can also be set as the structure made.

  Further, in the present invention, the auxiliary air chamber member 10 (see FIG. 3) or the base portion 14 (see FIG. 10) is integrally formed on the surface of the rim 11 (see FIG. 1) outside the tire air chamber 9. You can also. In this case, the tubular body 18 is inserted into the through hole for the tire air chamber 9 formed in the rim 11 in an airtight manner.

DESCRIPTION OF SYMBOLS 1 Wheel for vehicles 1a Wheel main body 10 Auxiliary air chamber member (Helmholtz resonator)
11 Rim 11c Well part 11d Outer peripheral surface of well part 12 Disc 13 Body part (Resonator body part)
14 Base part 18 Tube 18a Communication hole 21 Adhesive 22 Laser etched surface 41 Anchor hole 51 Mold 52 Internal space of the mold 52a Internal space of the mold 52b Internal space of the mold 52c Internal space of the mold 53a Molten resin Supply path 53b Gas supply path 53c Vent 61a Molten resin 61b Gas SC Secondary air chamber X Wheel circumferential direction Y Wheel width direction Z Wheel radial direction

Claims (7)

  A vehicle wheel comprising a Helmholtz resonator integrally formed on a surface of a rim.   The vehicle wheel according to claim 1, wherein an adhesive is interposed between the rim and the Helmholtz resonator.   The vehicle wheel according to claim 1, wherein the Helmholtz resonator is gas-assisted injection molded. The Helmholtz resonator is
A base part integrally formed on the surface of the rim;
A resonator body having a secondary air chamber and assembled to the base;
The vehicle wheel according to claim 1, further comprising:   The vehicle wheel according to claim 1, wherein a surface of the rim integrally formed with the Helmholtz resonator has an anchor hole.   The vehicle wheel according to claim 1, wherein a surface of the rim integrally formed with the Helmholtz resonator is formed by a laser etching surface. Disposing the wheel in a mold formed integrally with a wheel and a Helmholtz resonator attached to the rim of the wheel;
Injecting molten resin into the inner space of the mold shaped like the shape of the Helmholtz resonator;
Integrally forming the Helmholtz resonator on the rim with the molten resin injected into the mold;
A method for manufacturing a vehicle wheel, comprising:

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