JP2020111208A - Vehicular tire wheel assembly - Google Patents

Abstract

To provide a vehicular tire wheel assembly which allows a helmholtz resonator to be provided at low cost.SOLUTION: A vehicular tire wheel assembly 1A includes a wheel 2 appearing in a cylindrical shape, a tire 30 attached to an outer peripheral surface of the wheel 2, and a sub chamber member 40A accommodated in a tire air chamber S1 constituted by the wheel 2 and the tire 30. The sub chamber member 40A has engagement parts 47A, 48 which can engage with both end parts. The engagement of the engagement parts 47A, 48 allows an annular appearance.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle tire wheel assembly.

Conventionally, there is a Helmholtz resonator arranged on the outer peripheral surface of a well portion of a wheel for a vehicle, in which both edge portions protruding in the wheel width direction are locked in a circumferential groove provided in a rim. It is known (for example, refer to Patent Document 1). When this Helmholtz resonator is pressed toward the outer peripheral surface of the well portion, both edge portions thereof are elastically deformed and easily fit into the circumferential groove. Therefore, such a Helmholtz resonator can be easily attached to the wheel.

JP 2012-45971 A

However, in the conventional wheel having such a Helmholtz resonator (for example, refer to Patent Document 1), a peripheral groove for attaching the resonator must be cut and formed in the rim. Therefore, this wheel has a problem that the manufacturing process becomes complicated and the manufacturing cost increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle tire wheel assembly capable of providing a Helmholtz resonator at low cost.

In order to solve the above-mentioned problems, a vehicle tire wheel assembly of the present invention includes a wheel having a cylindrical shape, a tire attached to an outer peripheral surface of the wheel, and a space formed by the wheel and the tire. And a Helmholtz resonator, wherein the Helmholtz resonator has engaging portions that are engageable with each other at both ends in the circumferential direction, and the engaging portions engage with each other to present an annular shape. To do.

According to the present invention, since it is not necessary to form a circumferential groove for fixing the Helmholtz resonator to the wheel, a vehicle tire wheel assembly having the Helmholtz resonator can be provided at low cost.

It is sectional drawing which shows typically the tire wheel assembly for vehicles which concerns on 1st embodiment of this invention, and is sectional drawing seen from the axial direction of the rotating shaft. It is sectional drawing which shows typically the tire wheel assembly for vehicles which concerns on 1st embodiment of this invention, and is a II-II sectional view taken on the line of FIG. It is the elements on larger scale of the Helmholtz resonator which concerns on 1st embodiment of this invention, (a) is a figure which shows the state before engagement typically, (b) is a figure which shows the state after engagement typically Is. It is sectional drawing which shows typically the tire wheel assembly for vehicles which concerns on 2nd embodiment of this invention. It is a fragmentary enlarged view of the Helmholtz resonator in the vehicle tire wheel assembly concerning a third embodiment of the present invention, (a) is a sectional view showing the state before engagement typically, and (b) is after engagement. FIG. 4 is a cross-sectional view schematically showing the state. It is sectional drawing which shows typically the tire wheel assembly for vehicles which concerns on 4th embodiment of this invention, and is sectional drawing seen from the axial direction of the rotating shaft.

Next, a vehicle tire wheel assembly according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In FIGS. 1 to 6 referred to, “X” is the circumferential direction of the vehicle tire wheel assembly, “Y” is the width direction of the vehicle tire wheel assembly (axial direction of the rotating shaft), “ “Z” indicates the radial direction of the vehicle tire wheel assembly. In the following description, the terms "circumferential direction", "width direction" and "radial direction" refer to the circumferential direction, width direction and radial direction of the vehicle tire wheel assembly.

<First embodiment>
As shown in FIGS. 1 and 2, a vehicle tire wheel assembly 1A according to a first embodiment of the present invention includes a wheel 2, a tire 30, and a sub air chamber member (Helmholtz resonator) 40A. .. Here, the assembly of the wheel 2 and the sub air chamber member 40A constitutes a vehicle wheel.

<wheel>
The wheel 2 is a metal member such as an aluminum alloy or a magnesium alloy. The wheel 2 is formed in a substantially bottomed cylindrical shape by joining a disk 10 having a substantially disk shape and a rim 20A having a substantially cylindrical shape by welding or the like.

≪Disc≫
The disk 10 is a portion that is connected to a hub (not shown), and is provided at an opening of a width direction end portion (end portion on the vehicle width direction outer side) of the rim 20A. In the present embodiment, the disc 10 is a so-called spoke disc.

≪Rim≫
The rim 20</b>A includes a first peripheral wall portion 21 that is an intermediate portion in the width direction, a first side wall portion 22 that extends radially outward from one end portion in the width direction of the first peripheral wall portion 21, and a first side wall portion 22. Of the second peripheral wall portions 23, 23, and the second peripheral wall portions 23, 23 extending outward in the width direction from the radial outer end portion or the other end portion in the width direction of the first peripheral wall portion 21. A pair of second side wall portions 24, 24 extending radially outward from the width direction outer end portions, and a pair extending outward in the width direction from the radial direction outer end portions of the second side wall portions 24, 24. And the end wall portions 25, 25 are integrally provided. A combination of the second peripheral wall portion 23, the second side wall portion 24, and the end wall portion 25 at both widthwise ends of the rim 20 constitutes a bead seat to which the tire 30 is attached. In addition, the first peripheral wall portion 21 constitutes a well portion that is recessed radially inward between the pair of bead sheets.

Of the outer peripheral surface of the first peripheral wall portion 21 forming the well portion, one side in the width direction (vehicle outer side, disk 10 side) is a bottom surface 21a having the same diameter in the width direction, and the other side in the width direction (vehicle side). The inner side is an inclined surface 21b whose diameter increases toward the outer end in the width direction. In the present embodiment, the inclined surface 21b connects the widthwise outer end portion of the bottom surface 21a and the widthwise one end portion of the second peripheral wall portion 23. A protrusion 21c is formed at the boundary between the bottom surface 21a and the inclined surface 21b. The protrusion 21c has a substantially triangular shape that is lower than the auxiliary air chamber portion 40α when viewed from the circumferential direction, and the slope of the slope on the bottom surface 21a side is the slope of the slope on the slope surface 21b side (for example, with respect to the bottom surface 21a). It is set more gently than the vertical). The protrusion 21c may be formed in an annular shape over the entire circumferential direction, or may be formed intermittently in the circumferential direction so that the movement of the sub air chamber portion 40α can be regulated. Note that, in FIG. 1 and FIG. 6 described later, the projection 21c is not shown.

<Tires>
The tire 30 is a member mainly made of resin that is attached to the outer peripheral surface of the wheel 2 and constitutes an annular tire air chamber S1 together with the wheel 2. The tire 30 integrally includes a peripheral wall portion 31 having an annular shape having a diameter larger than that of the rim 20A, and a pair of side wall portions 32, 32 extending inward in the radial direction from both ends in the width direction of the peripheral wall portion 31. .. The peripheral wall portion 31 is a so-called tread portion that contacts the road surface. The base end portion (radially outer end portion) of the side wall portion 32 is a so-called shoulder portion. An intermediate portion (radially intermediate portion) of the side wall portion 32 is a so-called sidewall portion. The tip portion (radially inner end portion) of the side wall portion 32 is a so-called bead portion that is fixed to the bead seat of the rim 20A when the tire air chamber S1 is filled with air.

<Sub air chamber member>
The sub air chamber member 40A is a member for silencing the resonance sound (air column resonance sound) generated in the tire air chamber S1 by Helmholtz resonance. The sub air chamber member 40A is a resin member having a plurality of (four in the present embodiment) sub air chamber portions 40α arranged in the circumferential direction (for example, a polyamide resin (having a polyamide MXD6 as a base resin), 6 synthetic resin such as nylon). The sub air chamber member 40A can be manufactured by blow molding or the like.

The sub air chamber portion 40α is provided with a bottom wall portion 41 extending in the circumferential direction and having an arcuate shape in an axial view, and a pair of circumferential directions extending radially outward from both circumferential end portions of the bottom wall portion 41. The side wall portions 42, 42, a pair of width direction side wall portions 43, 43 extending radially outward from the width direction end portions of the bottom wall portion 41, the circumferential side wall portions 42, 42, and the width direction side wall portion 43. , 43, which extend in the circumferential direction so as to connect the upper ends of the ceiling walls 43, 43, and have an arcuate shape in an axial view. Further, the sub air chamber portion 40α includes a pipe portion 45 protruding from any of the wall portions (the ceiling wall portion 44 in the present embodiment). The pipe portion 45 functions as a communication hole that connects the sub air chamber S2, which is a space inside the sub air chamber 40α, and the tire air chamber S1.

In the present embodiment, the four sub air chamber portions 40α are arranged in the circumferential direction so as to have rotational symmetry of 90°. It should be noted that the four sub air chambers 40α may be arranged such that the openings (that is, the portions exhibiting the sound deadening function) on the tip side of the tube portion 45 are arranged at 90° intervals. Further, the bottom wall portions 41 of the four sub air chamber portions 40α are extended in the circumferential direction and are connected in series with each other, and have a ring shape as a whole. In other words, of the four sub air chambers 40α that are provided in series, the two adjacent sub air chambers 40α are connected to each other by the connecting portion 46 that is flush with the bottom wall portion 41.

The width of the sub air chamber portion 40α is sufficiently smaller than the width of the first peripheral wall portion 21 that is the well portion, and is less than or equal to the width of the inclined surface 21b in the present embodiment. Further, the bottom wall portion 41 of the sub air chamber portion 40α is formed so as to go radially outward toward the widthwise outer end portion, similarly to the inclined surface 21b.

Further, among the four auxiliary air chamber portions 40α provided in series, the leading auxiliary air chamber portion 40α is provided with a claw-shaped engaging portion 47A, and the trailing auxiliary air chamber portion 40α is provided. Is provided with an engaging portion 48 having a claw shape.

As shown in FIG. 3, the engaging portion 47A has an extending wall portion 47a extending in the circumferential direction from the circumferential side wall portion 42 on the leading side, and a radially outward direction from the tip end portion of the extending wall portion 47a. The radial wall portion 47b that extends is integrally provided with the folding wall portion 47c that extends in the folding direction from the radial outer end portion of the radial wall portion 47b. That is, the extending wall portion 47a, the radial wall portion 47b, and the folded wall portion 47c form a groove portion whose both ends in the width direction are open with the radial wall portion 47b as the bottom surface.

Further, the engaging portion 48 has an extending wall portion 48a extending in the circumferential direction from the rearmost circumferential side wall portion 42, and a diameter extending inward in the radial direction from the tip end portion of the extending wall portion 48a. The direction wall portion 48b and the folded wall portion 48c extending in the folding direction from the radially outer end portion of the radial wall portion 48b are integrally provided. That is, the extending wall portion 48a, the radial wall portion 48b, and the folded wall portion 48c form a groove portion whose both widthwise end portions are open with the radial wall portion 48b as a bottom surface.

<Assembly method of the sub air chamber member to the well portion>
As shown in FIGS. 3(a) and 3(b), the worker applies the engaging portions 47A and 48 from the width direction in a state in which the sub air chamber member 40A is provided on the bottom surface 21a side (see the dotted chain line in FIG. 2). Move and engage each other. That is, the folded wall portion 47c of the engaging portion 47A is fitted into the groove portion of the engaging portion 48, and the folded wall portion 48c of the engaging portion 48 is fitted into the groove portion of the engaging portion 47A. In this engaged state, the sub air chamber member 40A has an annular shape that is coaxial with the wheel 2, and the engagement portions 47A and 48 regulate the relative movement of the plurality of sub air chamber portions 40α in the circumferential direction and the radial direction. ..

Subsequently, as shown in FIG. 2, the worker moves the sub air chamber member 40A to the disk 10 side and brings the bottom wall portion 41 into contact with the inclined surface 21b. Here, the protrusion 21c contacts the widthwise side wall 43 on the inner side in the widthwise direction, and restricts the movement of the auxiliary air chamber member 40A in the widthwise direction (movement to the bottom surface 21a side).

A vehicle tire wheel assembly 1A according to a first embodiment of the present invention includes a wheel 2 having a cylindrical shape, a tire 30 attached to an outer peripheral surface of the wheel 2, the wheel 2 and the tire 30. And a Helmholtz resonator (sub air chamber member 40A) housed in a space (tire air chamber S1), the Helmholtz resonator having engaging portions 47A and 48 capable of engaging with each other at both ends, The engagement portions 47A and 48 are engaged with each other to form an annular shape.
Therefore, since the Helmholtz resonator is annular around the wheel 2 in the vehicle tire wheel assembly 1A, it is not necessary to process the circumferential groove for fixing the Helmholtz resonator to the wheel 2, and the vehicle tire wheel assembly 1A. The Helmholtz resonator can be provided at a low cost in the space of 1A.

Further, in the vehicle tire wheel assembly 1A, the wheel 2 is formed between a pair of width direction bead seats to which the tires 30 are attached, and a well portion formed between the bead seats and having a diameter smaller than that of the bead seats (first And a peripheral wall portion 21), the well portion has an inclined surface 21b having a diameter increasing toward one end in the width direction, and the Helmholtz resonator is separated from the bead seat at the other end in the width direction. It is characterized in that it is provided so as to come into contact with the inclined surface 21b in this state.
Therefore, in the vehicle tire wheel assembly 1A, the engaging portions 47A and 48 can be easily engaged with the Helmholtz resonator separated from the inclined surface 21b.

Further, in the vehicle tire wheel assembly 1A, in the width direction of the Helmholtz resonator, at least one of the Helmholtz resonator and the well portion is in contact with the Helmholtz resonator and the inclined surface 21b of the well portion. It is characterized by including a movement restricting portion (protrusion 21c) for restricting movement.
Therefore, the vehicle tire wheel assembly 1A can be preferably held with the Helmholtz resonator in contact with the inclined surface 21b.

Further, the vehicle tire wheel assembly 1A is characterized in that the engaging portions 47A, 48 have a claw shape that can be engaged with each other in the radial direction by sliding in the width direction.
Therefore, in the vehicle tire wheel assembly 1A, the engaging portions 47A and 48 can be easily engaged with a simple structure, and the engaging portions 47A and 48 can be preferably prevented from being disengaged due to centrifugal force. ..

<Second embodiment>
Next, the vehicle tire wheel assembly according to the second embodiment of the present invention will be described focusing on the differences from the vehicle tire wheel assembly 1A according to the first embodiment.

As shown in FIG. 4, in the vehicle tire wheel assembly 1B according to the second embodiment of the present invention, the first peripheral wall portion (well portion) 21 of the rim 20B, which replaces the rim 20A, has a protrusion 21c. Instead, the hole 21d is formed. The sub air chamber portion 40β, which replaces the sub air chamber portion 40α of the sub air chamber member 40B, further includes a protrusion 49. The protruding portion 49 is provided so as to protrude radially inward from the bottom wall portion 41 and is inserted into a bottomed hole portion (recess) 21d formed in the inclined surface 21b. The combination of the protrusion 49 and the hole 21d regulates the movement of the auxiliary air chamber member 40B in the width direction (movement to the bottom surface 21a side).

In the vehicle tire wheel assembly 1B according to the second embodiment of the present invention, at least one of the Helmholtz resonator and the well portion is in a state where the Helmholtz resonator and the inclined surface 21b of the well portion are in contact with each other. A movement restricting portion (a hole portion 21d and a protrusion portion 49) that restricts movement of the Helmholtz resonator in the width direction is provided.
Therefore, the vehicle tire wheel assembly 1B can be suitably held with the Helmholtz resonator in contact with the inclined surface 21b.

<Third embodiment>
Next, the vehicle tire wheel assembly according to the third embodiment of the present invention will be described focusing on the differences from the vehicle tire wheel assembly 1A according to the first embodiment.

As shown in FIG. 5, in the vehicle tire wheel assembly 1C according to the third embodiment of the present invention, the sub air chamber member 40C instead of the sub air chamber member 40A is an engaging portion instead of the engaging portion 47A. With 47C. The engaging portion 47C includes an extending wall portion 47d extending in the circumferential direction from the leading side circumferential side wall portion 42, and a hole portion 47e formed in the extending wall portion 47d. The operator inserts the engaging portion 48 into the hole portion 47e to engage the engaging portion 48. That is, the tip end portion of the extending wall portion 48a abuts on the radial outer surface of the extending wall portion 47d, the radial wall portion 48b abuts on the inner surface of the hole portion 47e, and the folded wall portion 48c of the extending wall portion 47d. Abuts on the radially inner surface. In the engaged state, the sub air chamber member 40C has an annular shape coaxial with the wheel 2.

In the vehicle tire wheel assembly 1C according to the third embodiment of the present invention, the engaging portions 47C and 48 can be easily engaged with a simple structure, and the engaging portions 47C and 48 are disengaged by centrifugal force. Can be preferably prevented.

<Fourth Embodiment>
Next, the vehicle tire wheel assembly according to the fourth embodiment of the present invention will be described focusing on the differences from the vehicle tire wheel assembly 1A according to the first embodiment.

As shown in FIG. 6, a vehicle tire wheel assembly 1D according to a fourth embodiment of the present invention includes a plurality of (four in the present embodiment) sub air chamber members instead of the sub air chamber members 40A. 40D. The sub air chamber member 40D corresponds to one sub air chamber portion 40α. In the sub air chamber member 40D, a convex portion 42a is formed on one circumferential side wall portion 42, and a concave portion 42b is formed on the other circumferential side wall portion 42. In the present embodiment, the recess 42b is a groove that extends in the width direction and is open at both ends in the width direction.

The convex portion 42a of the one sub air chamber member 40D is engaged by being inserted into the concave portion 42b of the other sub air chamber member 40D. Further, the concave portion 42b of the one sub air chamber member 40D is engaged with by inserting the convex portion 42a of the other sub air chamber member 40D. Due to this engagement, the plurality of sub air chamber members 40D have an annular shape that is coaxial with the wheel 2.

<Assembly method of the sub air chamber member to the well portion>
The operator may engage the plurality of sub air chamber members 40D with each other on the side of the inclined surface 21b (see FIG. 2), or engage the plurality of sub air chamber members 40D with each other on the side of the bottom surface 21a (see FIG. 2). You may make it annular and move to the inclined surface 21b side.

A vehicle tire wheel assembly 1D according to a fourth embodiment of the present invention includes a plurality of the Helmholtz resonators (sub air chamber members 40D), and the engaging portion (provided at one end of the Helmholtz resonator). The plurality of Helmholtz resonators have an annular shape by the convex portion 42a) and the engaging portion (recess 42b) provided at the other end of the other Helmholtz resonator being engaged with each other. To do.
Therefore, in the vehicle tire wheel assembly 1D, the plurality of Helmholtz resonators are engaged with each other so as to form an annular shape around the wheel 2, and therefore it is not necessary to form the circumferential groove for fixing the Helmholtz resonator to the wheel 2. Therefore, the Helmholtz resonator can be provided in the space of the vehicle tire wheel assembly 1A at low cost.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the scope of the present invention. For example, the shapes of the engaging portion and the movement restricting portion are not limited to those described above.

1A, 1B, 1C, 1D Vehicle tire-wheel assembly 2 Wheel 21b Inclined surface 21c Projection part (movement restriction part)
21d Hole (movement restriction part)
30 Tires 40A, 40B, 40C, 40D Sub air chamber member (Helmholtz resonator)
47A, 47C Engagement part 48 Engagement part 49 Projection part (movement control part)

Claims (5)

A wheel with a cylindrical shape,
A tire attached to the outer peripheral surface of the wheel,
A Helmholtz resonator housed in a space formed by the wheel and the tire,
Equipped with
A tire wheel assembly for a vehicle, wherein the Helmholtz resonator has engaging portions capable of engaging with each other at both ends, and the engaging portions engage with each other to form an annular shape. The wheel is
A pair of width direction bead sheets to which the tire is attached,
A well portion formed between the bead sheets and having a diameter smaller than that of the bead sheets,
Have
The well portion has an inclined surface whose diameter increases toward one end in the width direction,
The vehicle tire wheel assembly according to claim 1, wherein the Helmholtz resonator is provided so as to contact the inclined surface in a state of being separated from the bead seat at the other end in the width direction. At least one of the Helmholtz resonator and the well portion includes a movement restricting portion that restricts movement of the Helmholtz resonator in the width direction when the Helmholtz resonator and the inclined surface of the well portion are in contact with each other. The tire wheel assembly for a vehicle according to claim 2. The tire wheel assembly for a vehicle according to any one of claims 1 to 3, wherein the engagement portion has a claw shape that can be engaged with each other in the radial direction by sliding in the width direction. Three-dimensional. A plurality of the Helmholtz resonators,
One of the Helmholtz resonators, the engaging portion provided at one end of the Helmholtz resonator, and the engaging portion provided at the other end of the other Helmholtz resonator are engaged with each other, so that the plurality of Helmholtz resonators are provided. The tire wheel assembly for a vehicle according to claim 1, wherein the tire wheel assembly has a ring shape.

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