JP2020082809A - Tire wheel assembly and manufacturing method of the same - Google Patents

Abstract

To provide a tire wheel assembly which enables easy attachment of a helmholtz resonator to a wheel which is a commercial item.SOLUTION: A tire wheel assembly 1 includes: a sub air chamber member 10 disposed within a tire air chamber 9 and serving as a helmholtz resonator; and a support member 20 which is provided so as to extend from the sub air chamber member 10. The sub air chamber member 10 is supported in a cantilever manner with the support member 20 sandwiched between a bead 24 of a tire 1b and a bead seat 15 of a rim 11.SELECTED DRAWING: Figure 2

Description

The present invention relates to a tire wheel assembly and a method for manufacturing the tire wheel assembly.

BACKGROUND ART Conventionally, a vehicle wheel having a Helmholtz resonator on an outer peripheral surface of a well portion of a rim is known (for example, refer to Patent Document 1). In the vehicle wheel of Patent Document 1, a vertical wall is formed on the outer peripheral surface of the well so as to extend in the wheel circumferential direction, and the Helmholtz resonator is locked in the groove formed in the vertical wall. It is composed.

JP 2012-45971 A

However, the conventional vehicle wheel (for example, refer to Patent Document 1) requires a groove portion in the vertical wall of the wheel, and therefore a commercial product of the wheel cannot be used as it is, which increases the manufacturing cost of the wheel. was there. Therefore, there has been a demand for a tire-wheel assembly in which a Helmholtz resonator can be easily attached to a commercially available wheel.

An object of the present invention is to provide a tire wheel assembly that allows a Helmholtz resonator to be easily attached to a commercially available wheel, and a method for manufacturing the tire wheel assembly.

The tire wheel assembly of the present invention to achieve the above-mentioned object, comprises a sub air chamber member as a Helmholtz resonator arranged in the tire air chamber, and a support member extending from the sub air chamber member, The air chamber member is characterized in that the support member is cantilevered by being sandwiched between the bead of the tire and the bead seat of the rim.

In the method for manufacturing a tire wheel assembly of the present invention, the first step of dropping the bead on the side sandwiching the support member into the well portion of the rim, and the second step of assembling the support member to the dropped bead. And a third step of seating the bead with the support member mounted on the bead seat.

ADVANTAGE OF THE INVENTION According to this invention, the tire wheel assembly which can attach a Helmholtz resonator to a commercially available wheel easily, and its manufacturing method can be provided.

It is a perspective view of the tire wheel assembly concerning the embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II in FIG. 1. It is the whole auxiliary air chamber member perspective view, and is a figure containing a supporting member. 1A is a view of the auxiliary air chamber member of FIG. 1 looking down from diagonally above inside the wheel width direction, and FIG. 1B is a view of the sub air chamber member of FIG. 1 looking down from above diagonally outside the wheel width direction. is there. FIG. 4 is a side view of the sub air chamber member schematically showing a state of the sub air chamber member as seen from the direction of arrow IV in FIG. (A)-(c) is a manufacturing-process figure of a tire wheel assembly. It is a side view of the sub air chamber member which concerns on a modification. It is a fragmentary sectional view around a rim flange which shows the modification of a supporting member. It is a fragmentary sectional view around a rim flange which shows the modification of a rim. (A) is a partial plan view of a support member according to a modification, and (b) is a sectional view taken along line IXb-IXb of (a). It is the whole auxiliary air chamber member perspective view which has a supporting member concerning other modifications, (a) is a figure corresponding to Drawing 3 (a), (b) is a figure corresponding to Drawing 3 (b). Is.

Next, a tire wheel assembly 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.

<Overall structure of tire wheel assembly>
FIG. 1 is a perspective view of a tire wheel assembly 1 according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II of FIG.
As shown in FIG. 1, a tire/wheel assembly 1 according to the present embodiment includes a wheel 1a, a tire 1b, a sub air chamber member 10 as a Helmholtz resonator, and a support member 20 that cantilevers the sub air chamber member 10. And is mainly provided.

The wheel 1a in the present embodiment is assumed to be made of a light metal such as an aluminum alloy or a magnesium alloy, or a general steel material.
The wheel 1a includes a rim 11 on which the tire 1b is mounted and a disc 12 for connecting the rim 11 to a hub (not shown).
The rim 11 has a well portion 11c that is recessed toward the inner side in the wheel radial direction (rotation center side) between the bead seats 15 formed at both ends in the wheel width direction Y.

As shown in FIG. 2, the rim 11 has a bead sheet 15 formed on both outer sides of the outer peripheral surface 11d of the well portion 11c in the wheel width direction Y via humps 16. Then, the outside of the bead seat 15 in the wheel width direction Y rises to the rim flange 14.

As shown in FIG. 1, the tire 1b extends in a toroidal shape around the rim 11 to form a tire air chamber 9 inside.
As shown in FIG. 2, the tire 1b includes a tread 21 forming a ground contact surface, a sidewall 23 forming a side surface of the tire 1b via a shoulder 22, and a bead 24 arranged on the bead seat 15. ing.

A bead wire 24 a is arranged inside the bead 24. The bead wire 24a extends annularly in the circumferential direction of the rim 11. Then, the bead wire 24a causes the bead 24 to be seated on the bead seat 15 by the elastic force.

<Sub air chamber member>
Next, the sub air chamber member 10 (see FIG. 1) will be described.
As shown in FIG. 1, the sub air chamber member 10 (Helmholtz resonator) is arranged so as to be adjacent to the bead seat 15 on the side opposite to the disk 12 side forming the design surface.
The sub air chamber member 10 is composed of a hollow body having a hollow portion inside. The auxiliary air chamber member 10 in the present embodiment is assumed to be a resin molded product such as polypropylene or polyamide.
However, the sub air chamber member 10 can also be formed of a metal plate.

The sub air chamber member 10 is a member that is long in one direction, and includes a main body portion 13 formed in a tubular shape and a tube body 18 in which a communication hole 18a is formed.
However, the cross-sectional shape of the main body 13 is not limited to the circular shape, and may be any cross-sectional shape. Further, the sectional shape of the tubular body 18 in which the communication hole 18a is formed is not limited to the circular shape, and may be an arbitrary sectional shape. Further, the position of the tubular body 18 in the main body portion 13 is not particularly limited and can be set to any position of the main body portion 13.
The sub air chamber member 10 is configured to have a symmetrical shape in the wheel circumferential direction X with the partition wall 13a extending in the wheel width direction Y at the center of the main body 13 as a boundary.

FIG. 3 is an overall perspective view of the sub air chamber member 10, and is a view including a support member 20 described later. 1A is a view of the sub air chamber member 10 of FIG. 1 looking down from the inside obliquely above in the wheel width direction Y, and FIG. 1B is a view of the sub air chamber member 10 of FIG. It is the figure which looked down.

As shown in FIGS. 3A and 3B, the main body portion 13 of the sub air chamber member 10 is curved in its longitudinal direction. That is, the main body 13 is arranged along the wheel circumferential direction X when arranged on the outer peripheral surface 11d of the well 11c.
The hollow portion (not shown) of the main body portion 13 forms a sub air chamber SC (see FIG. 3) described later. The hollow portion is divided into two in the wheel circumferential direction X by the partition wall 13a. The partition wall 13a is formed such that a part of the upper side and a part of the lower side of the peripheral wall 17 forming the main body 13 are recessed in the wheel width direction Y in a groove shape. Although not shown in the drawings, the partition wall 13a is formed by joining a part of the upper side and a part of the lower side of the peripheral wall 17 at a substantially central position of the hollow portion.

Next, the tubular body 18 (see FIG. 3) will be described.
FIG. 4 is a side view of the sub air chamber member 10 that schematically shows the state of the sub air chamber member 10 as seen from the direction of the arrow IV in FIG.
As shown in FIG. 4, the tubular body 18 is formed so as to project in the wheel circumferential direction X from the end surface of the main body portion 13 in the wheel circumferential direction X.

As described above, the sub air chamber member 10 in the present embodiment has a symmetrical shape in the wheel circumferential direction X with the partition wall 13a as a boundary. Therefore, the tubular bodies 18 in the present embodiment are arranged so as to be paired at positions symmetrical to each other at both ends of the main body 13 in the longitudinal direction (wheel circumferential direction X).

Further, as shown in FIGS. 3A and 3B, a communication hole 18a is formed inside the tube body 18. Such a communication hole 18a is formed between the sub air chamber SC (see FIG. 2) formed inside the main body 13 and the tire 1b (see FIG. 2) on the well 11c (see FIG. 2). The tire air chamber 9 (see FIG. 2) to be communicated.

Then, as shown in FIG. 4, the pair of tubular bodies 18 are arranged at positions that are open at approximately 90° intervals with respect to the wheel axis Ax.
Unlike the conventional wheel, the sub air chamber member 10 having the tube bodies 18 (communication holes 18a) arranged at such intervals produces "silence unevenness" when vibration is input from the tread 21 of the tire 1b. It can be prevented more reliably.

However, the number of the sub air chambers SC and the position of the tubular body 18 are not limited to this. Therefore, when the number of the sub air chambers SC is two, the respective tubular bodies 18 can be arranged at positions that open 90 degrees around the wheel rotation axis. Further, when the number of the sub air chambers SC is three or five or more, the respective tubular bodies 18 can be arranged at equal intervals in the wheel circumferential direction X.

<Supporting member>
Next, the support member 20 will be described.
As shown in FIG. 2, the supporting member 20 in the present embodiment extends while bending from the sub air chamber member 10 toward the rim flange 14 side opposite to the disc 12.
As shown in FIGS. 3A and 3B, the support member 20 is formed to have a length equal to the length of the main body portion 13 of the sub air chamber member 10 in the wheel circumferential direction X over substantially the entire length thereof. ..
Further, the support member 20 is formed integrally with the sub air chamber member 10 so as to extend from the peripheral wall 17 positioned substantially at the center of the sub air chamber member 10 in the vertical direction (wheel radial direction Z).
However, the support member 20 is formed separately from the sub air chamber member 10 and can be attached to the sub air chamber member 10 later. Therefore, the support member 20 may be made of metal.

As shown in FIG. 3B, the support member 20 is formed of a bent plate body.
Specifically, the support member 20 includes a first member 20a, a second member 20b, and a third member 20c.
More specifically, as shown in FIG. 2, the support member 20 includes a first member 20a extending from the auxiliary air chamber member 10 to the outside in the wheel width direction Y, and a lower portion (wheel diameter) from the tip of the first member 20a. A second member 20b extending inward in the direction Z), a third member 20c extending further from the lower end of the second member 20b to the outside in the wheel width direction Y, and an upper end (wheel diameter) of the third member 20c. And a fourth member 20d extending in an inverted S-shaped curve (outside of the direction Z). Incidentally, the inverted S-shaped curve of the fourth member 20d is formed following the shape of the contact surface between the bead 24 and the rim flange 14.

The support member 20 has spring elasticity, and the substantially U-shaped portion formed by the second member 20b, the third member 20c, and the fourth member 20d is wound and sandwiched by the bead 24. It has a clip function.

As shown in FIG. 2, such a supporting member 20 is sandwiched between the bead seat 15 and the bead 24 seated on the bead seat 15.
Specifically, the support member 20 is sandwiched between the bead seat 15 and the bead 24 on the side opposite to the disk 12 side.
As a result, the sub air chamber member 10 is cantilevered by the support member 20 in the tire wheel assembly 1.
The support member 20 sandwiches the bead 24 by the clip function before and after being sandwiched between the bead 24 and the bead sheet 15.

In such a tire wheel assembly 1, as shown in FIG. 1, a marker M indicating the attachment position of the sub air chamber member 10 is attached to the sidewall 23 of the tire 1b.
However, the marker M can also be attached to the rim flange 14 of the rim 11. Further, the marker M can be attached to both the tire 1b and the rim 11.
The marker M can also be attached to at least one of the tire 1b and the rim 11 located on the side surface opposite to the disk 12.

<Method for manufacturing tire wheel assembly>
Next, a method for manufacturing the tire wheel assembly according to this embodiment will be described.
5A to 5C are manufacturing process diagrams of the tire wheel assembly 1. 5(a) to 5(c), the tire 1b is partially shown only in the vicinity of the bead 24 on the side where the support member 20 is assembled for convenience of drawing.

In this manufacturing method, as shown in FIG. 5(a), a wheel 1a and a tire 1b assembled to the wheel 1a are prepared in advance.
Then, in this manufacturing method, the bead 24 on the side sandwiching the support member 20 is dropped into the well portion 11c of the rim 11. This step corresponds to the "first step" in the claims.

Next, in this manufacturing method, as shown in FIG. 5B, the support member 20 in which the sub air chamber member 10 is integrated is assembled to the dropped bead 24. Specifically, the support member 20 sandwiches the bead 24 by the above-mentioned clip function. This step corresponds to the "second step" in the claims.

Next, in this manufacturing method, as shown in FIG. 5C, the bead 24 with the support member 20 assembled thereon is moved onto the bead sheet 15, so that the bead 24 is attached to the bead sheet 15 via the support member 20. Sit down. This step corresponds to the "third step" in the claims.
As a result, the auxiliary air chamber member 10 is cantilevered in the tire air chamber 9 by the support member 20 sandwiched between the bead 24 and the bead seat 15.
Then, in parallel with these first to third steps, the other bead (not shown) is seated on the bead seat 15 on the side of the disk 12 to complete a series of manufacturing steps of the tire wheel assembly 1. To do.

<Effect>
Next, the function and effect of the tire wheel assembly 1 of this embodiment will be described.
In the conventional wheel (for example, refer to Patent Document 1), the groove portion for attaching the sub air chamber member is required as described above. Therefore, there has been a demand for a tire/wheel assembly in which a Helmholtz resonator can be easily attached to a commercially available wheel.

In the tire wheel assembly 1 of the present embodiment, the sub air chamber member 10 is cantilevered by the support member 20 sandwiched between the bead 24 and the bead seat 15 of the tire 1b.
According to such a tire wheel assembly 1, the Helmholtz resonator can be easily attached to a commercially available wheel.
Further, according to the tire wheel assembly 1, since the support member 20 is sandwiched between the bead 24 and the bead seat 15 to support the sub air chamber member 10 in a cantilever manner, the sub air chamber member 10 is assembled. Wearability is improved.

The support member 20 is formed to have a length equal to the length of the main body 13 of the sub air chamber member 10 over the entire wheel circumferential direction X.
With such a support member 20, the main body portion 13 of the sub air chamber member 10 can be stably supported on the rim 11 over substantially the entire wheel circumferential direction X of the main body portion 13.

In addition, in the tire wheel assembly 1, the support member 20 sandwiches the bead 24 so as to be wound.
According to such a tire wheel assembly 1, as shown in FIG. 5B, when the support member 20 is positioned with respect to the bead 24, the support member 20 is unlikely to shift with respect to the bead 24. This further improves the assemblability of the sub air chamber member 10.

Generally, when the tire 1b is assembled to the rim 11, the bead 24 is once dropped into the well portion 11c from the side opposite to the disc 12 side (design surface side) and then seated on the bead seat 15.
On the other hand, the support member 20 of the tire wheel assembly 1 is sandwiched between the bead seat 15 and the bead 24 on the side opposite to the disk 12 side.
Therefore, according to such a tire wheel assembly 1, when the tire 1b is assembled to the rim 11, the bead 24 on the side supporting the auxiliary air chamber member 10 in a cantilever manner is well behind the bead 24 on the opposite side. It is dropped into the part 11c. Therefore, according to the tire wheel assembly 1, the sub air chamber member 10 can be easily attached to the bead 24.

Further, in the tire wheel assembly 1, at least one of the tire 1b and the rim 11 is provided with a marker M indicating the attachment position of the sub air chamber member 10.
According to such a tire wheel assembly 1, by inserting a tire replacement tool such as a lever into the tire wheel assembly 1 while avoiding the position of the marker M when replacing the tire 1b, the tire replacement tool for the sub air chamber member 10 is inserted. Interference can be avoided.

Further, in the method of manufacturing the tire wheel assembly 1, the bead 24 is seated on the bead seat 15 after the support member 20 is assembled to the bead 24 dropped in the well portion 11c.
According to such a method of manufacturing the tire wheel assembly 1, the sub air chamber member 10 can be easily attached to the bead 24.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be implemented in various forms.
In the above embodiment, the tubular body 18 having the communication hole 18a is formed so as to project from the main body 13 in the wheel circumferential direction X. However, the protruding direction of the tubular body 18 is not limited to this.

FIG. 6 is a side view of the sub air chamber member 10a according to the modification.
As shown in FIG. 6, the tubular body 18 of the auxiliary air chamber member 10a projects from the end of the main body 13 in the wheel circumferential direction X toward the outside in the wheel radial direction Z.
Further, although not shown, the tubular body 18 may be configured to project outward or inward in the wheel width direction.
The pair of tubular bodies 18 shown in FIG. 6 are arranged at positions that are open at approximately 90° intervals with respect to the wheel axis Ax.

FIG. 7 to be referred to next is a partial cross-sectional view around the rim flange 14 showing a modified example of the support member 20. FIG. 8 is a partial cross-sectional view around the rim flange 14 showing a modified example of the rim 11. 9A is a partial plan view of the support member 20 according to the modification, and FIG. 9B is a sectional view taken along line IXb-IXb of FIG. 9A.

As shown in FIG. 7, in the support member 20 according to the modified example, the front end portion of the support member 20 extending from the bead seat 15 side to the rim flange 14 side is folded back and sandwiches the front end portion of the rim flange 14. When the support member 20 is made of metal, the support member 20 may be sandwiched between the bead 24 and the bead seat 15 and then folded back to the tip end side of the rim flange 14.
In the tire wheel assembly 1 having the support member 20 as described above, the sub air chamber member 10 is more firmly fixed to the rim 11.

As shown in FIG. 8, in the rim 11 according to the modified example, a recess 25 that absorbs a step between the support member 20 and the rim 11 is provided in a part of the rim 11 that holds the support member 20 between the bead 24. Has been formed. The recess 25 is formed by a groove extending from the bead seat 15 side to the rim flange 14 side depending on the width of the support member 20 in the wheel circumferential direction X (see FIG. 1) and the thickness of the support member 20.
Since such a rim 11 can absorb a step between the rim 11 and the support member 20, even if the amount of elastic deformation of the bead 24 in contact with the bead sheet 15 is small, the rim 11 and the tire 1b can be more surely excellent. It is possible to maintain good airtightness.

As shown in FIGS. 9A and 9B, the support member 20 according to the modification has a plurality of slits 26 formed along the direction in which the support member 20 extends from the sub air chamber member 10. .. These slits 26 are formed so as to be aligned in the wheel circumferential direction X.
When such a support member 20 is sandwiched between the bead 24 and the bead seat 15, the support member 20 can be more flexibly and elastically deformed so as to follow the curved surface in the wheel circumferential direction X.

Next, FIG. 10A and FIG. 10B to be referred to are overall perspective views of an auxiliary air chamber member having a support member 20 according to another modification, and FIG. ), and FIG. 10(b) is a diagram corresponding to FIG. 3(b).
The support member 20 according to this modification is different from the support member 20 according to the above-described embodiment (see FIGS. 3A and 3B) in the center portion of the auxiliary air chamber member 10 in the wheel circumferential direction X. Partially provided.
According to the support member 20 according to this modification, the clip operation of the support member 20 with respect to the bead 24 becomes easy in the “second step” (see FIG. 5B) of the method for manufacturing a tire wheel assembly.

DESCRIPTION OF SYMBOLS 1 tire wheel assembly 1a wheel 1b tire 9 tire air chamber 10 sub air chamber member 10a sub air chamber member 11 rim 11c well portion 11d well portion outer peripheral surface 12 disk 13 main body portion 13a partition wall 14 rim flange 15 bead sheet 16 hump 17 peripheral wall 18 tubular body 18a communication hole 20 support member 20a first member 20b second member 20c third member 20d fourth member 21 tread 22 shoulder 23 sidewall 24 bead 24a bead wire 25 recess 26 slit Ax wheel shaft M marker SC auxiliary air Chamber X Wheel circumferential direction Y Wheel width direction Z Wheel radial direction

Claims (8)

A sub air chamber member as a Helmholtz resonator arranged in the tire air chamber,
A support member provided so as to extend from the sub air chamber member,
Equipped with
A tire wheel assembly, wherein the auxiliary air chamber member is cantilevered by sandwiching the support member between a bead seat of a tire and a bead seat of a rim. The tire wheel assembly according to claim 1, wherein the support member sandwiches the bead so as to be wound therein. The tire wheel assembly according to claim 2, wherein a tip end portion of the support member extending from the bead seat side to the rim flange side is folded back to further sandwich the tip end portion of the rim flange. The tire wheel assembly according to claim 1, wherein the support member is sandwiched between the bead seat and the bead on the side opposite to the disc side of the wheel. The tire wheel assembly according to claim 1, wherein the support member is formed with a plurality of slits extending along the extending direction of the support member so as to be aligned in the wheel circumferential direction. The tire wheel assembly according to claim 1, wherein at least one of the tire and the rim is provided with a marker indicating a mounting position of the sub air chamber member. The tire wheel assembly according to claim 1, wherein a rim portion that holds the support member between the tire and the tire is formed with a recess that absorbs a step between the support member and the rim. .. It is a manufacturing method of the tire wheel assembly according to claim 1,
A first step of dropping the bead on the side sandwiching the support member into the well portion of the rim;
A second step of assembling the support member to the dropped bead;
A third step of seating the bead with the support member mounted on the bead seat;
A method of manufacturing a tire wheel assembly, comprising:

Images