JP2018144612A - Vehicular wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular wheel capable of suppressing a decrease in rigidity while sufficiently securing the capacity of an auxiliary air chamber.SOLUTION: In a vehicular wheel 1A, auxiliary air chambers SC1, SC2, SC3 and SC4 serving as helmholtz resonators are provided on an outer peripheral surface 11s of a rim 11. The rim 11 comprises hump parts H1 and H2 that protrude to the outside Z1 in a radial direction Z in a cross-sectional view in a width direction Y, a recess 31 that is formed between the hump parts H1 and H2, and a lid part 41 that forms the auxiliary air chambers SC1, SC2, SC3 and SC4 by connecting the hump parts H1 and H2 together and closing the recess 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle wheel.

  A tire that is said to have a large diameter and a narrow width is known to be effective in fuel efficiency (fuel consumption rate), but there is a tendency for noise called air column resonance to increase. As a countermeasure against such noise, a vehicle wheel equipped with a narrow resonator having a narrow width has been proposed (for example, see Patent Document 1).

JP-A-2015-174495

  However, in the vehicle wheel described in Patent Document 1, there is a possibility that the rigidity of the wheel is lowered and the comfort during traveling is impaired.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a vehicle wheel that enhances comfort during traveling.

  The present invention relates to a vehicle wheel in which a sub air chamber as a Helmholtz resonator is provided on an outer peripheral surface of a rim. The rim includes a first hump portion and a second hump that project radially outward in a cross-sectional view in the width direction. A hump, a recess formed between the first hump and the second hump, and a lid that forms the auxiliary air chamber by closing the recess from the outer periphery of the rim; It is characterized by providing.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle wheel which improved the comfort at the time of driving | running | working can be provided.

It is sectional drawing of the vehicle wheel which concerns on 1st Embodiment. It is a partially cutaway perspective view of the vehicle wheel according to the first embodiment. It is a front view of the wheel for vehicles concerning a 1st embodiment. It is sectional drawing of the vehicle wheel which concerns on 2nd Embodiment. It is a front view of the wheel for vehicles concerning a 2nd embodiment. It is sectional drawing of the wheel for vehicles which concerns on 3rd Embodiment. It is a front view of the wheel for vehicles concerning a 3rd embodiment. It is sectional drawing of the wheel for vehicles which concerns on 4th Embodiment. It is a front view of the wheel for vehicles concerning a 4th embodiment. It is sectional drawing of the wheel for vehicles which concerns on 5th Embodiment. It is a front view of the wheel for vehicles concerning a 5th embodiment. It is a B direction arrow line view of FIG. It is a front view of the wheel for vehicles concerning the modification of a 5th embodiment. It is sectional drawing of the wheel for vehicles which concerns on 6th Embodiment. It is a front view of the wheel for vehicles concerning a 6th embodiment.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
(First embodiment)
FIG. 1 is a perspective view of a vehicle wheel according to the first embodiment.
As shown in FIG. 1, the vehicle wheel 1 </ b> A according to the first embodiment is provided with auxiliary air chambers SC <b> 1, SC <b> 2, SC <b> 3, SC <b> 4 as Helmholtz resonators on the outer peripheral surface 11 s of the rim 11.

  The vehicle wheel 1A includes a rim 11 for attaching the tire 20 and a disk 12 for connecting the rim 11 to a hub (not shown). The vehicle wheel 1A can be made of a light metal such as aluminum, an aluminum alloy, or a magnesium alloy.

  The rim 11 is a recess having a shape recessed toward the inner side Z2 of the wheel radial direction Z (hereinafter referred to as the radial direction Z) and the hump portion H1 (first hump portion) and the hump portion H2 (second hump portion). Part 31. A lid 41 is attached to the recess 31 from the outer peripheral side of the rim 11 so as to connect the hump H1 and the hump H2.

  The rim 11 has bead sheets 11a and 11b formed at both ends in the wheel width direction Y (hereinafter referred to as the width direction Y). In the present embodiment, the bead seat 11a and the hump portion H1 are described as the inner side (inside) of the vehicle wheel 1A, and the bead seat 11b and the hump portion H2 are described as the outer side (outside) of the vehicle wheel 1A. . In FIG. 1, the bead 21a, 21b vicinity of the tire 20 assembled | attached to the rim | limb 11 is partially drawn with the virtual line (two-dot chain line).

  The hump portion H1 is formed on the recessed portion 31 side of the bead sheet 11a so as to protrude outward Z1 in the radial direction Z in the cross-sectional view in the width direction Y (cross-sectional view in the width direction). The hump portion H2 is formed on the recessed portion 31 side of the bead sheet 11b so as to protrude outward Z1 in the radial direction Z in the cross-sectional view in the width direction Y (cross-sectional view in the width direction). That is, in the rim 11, the recessed portion 31 is formed integrally with the rim 11 so as to connect the hump portion H1 and the hump portion H2.

  The recessed portion 31 is formed so that the concave surface faces the outer side Z1 in the radial direction Z, extends in the wheel circumferential direction X (hereinafter referred to as the circumferential direction X; see FIG. 2), and is rotated by the wheel rotation axis O (hereinafter referred to as the rotation axis). It is formed in an annular shape centering on O. See FIG.

  Moreover, the recessed part 31 is located between the hump part H1 and the hump part H2. The recess 31 includes a bottom surface portion 31a extending in the width direction Y in a cross-sectional view in the width direction Y, and a side surface portion (rising portion) 31b extending from the inner side end of the bottom surface portion 31a toward the hump portion H1. And a side surface portion (rising portion) 31c extending from the outer end portion of the bottom surface portion 31a toward the hump portion H2.

  In addition, partition walls 31d, 31e, and 31f extending from the bottom surface portion 31a toward the outer side Z1 in the radial direction Z are formed integrally with the recess portion 31 (rim 11) in the recess portion 31. The partition walls 31d to 31f are formed with an interval in the width direction Y. Thereby, the recessed part 31 is divided into four recessed parts 32a, 32b, 32c, and 32d.

  Further, the inner partition wall 31d is formed with the highest height from the bottom surface portion 31a. The outer side partition wall 31f is formed with the lowest height from the bottom surface portion 31a. The central partition wall 31e is formed at a height between the partition wall 31d and the partition wall 31f. That is, the partition walls 31d to 31f are configured such that the height decreases from the inner side toward the outer side.

  The lid portion 41 is configured by a plate-like member in the cross-sectional view in the width direction Y (cross-sectional view in the width direction), and connects the hump portion H1 and the hump portion H2 and closes the recess portion 31 from the outer peripheral side of the rim 11. The auxiliary air chambers SC1, SC2, SC3, and SC4 are formed. Moreover, the cover part 41 is extended in the circumferential direction X (refer FIG. 2), and is cyclically | annularly formed centering | focusing on the rotating shaft O (refer FIG. 2).

  Moreover, as a material of the cover part 41, for example, CFRP (Carbon Fiber Reinforced Plastics) is formed. Since CFRP has a high specific strength and specific rigidity, it is possible to reduce the weight of the vehicle wheel 1A. And the rigidity of the dent part 31 can be improved and the comfort at the time of driving | running | working can be improved. Moreover, since the centrifugal force applied to the cover part 41 is proportional to the mass of the cover part 41, if the cover part 41 is lightweight, it will become easy to fasten the cover part 41 to the recessed part 31. FIG.

  In addition, as a material of the cover part 41, it is not limited to CFRP, Other fiber reinforced plastics may be sufficient. Further, the plastic material of the lid portion 41 may be a thermoplastic resin such as polypropylene, which is resistant to repeated bending fatigue, or nylon having high heat resistance. The material of the reinforcing fiber may be an aramid fiber or a glass fiber in addition to the carbon fiber.

  Further, in the case where the resonator is mounted, a dent portion 31 is formed in the rim 11. For this reason, when a lateral force acts on the tire 20 during actual running, the curved portion R1 at the boundary between the bottom surface portion 31a and the side surface portion 31b and the bottom surface portion 31a and the side surface portion 31c are compared with a normal normal rim. The bending deformation at the curved portion R2 at the boundary increases. For this reason, there is a possibility that the rim 11 may be deformed in a direction to open left and right (width direction Y). However, in this embodiment, by closing the dent part 31 with the cover part 41, the deformation | transformation which opens to the right and left of the rim | limb 11 can be suppressed, and it becomes possible to improve the comfort at the time of driving | running | working. In addition, since the lid portion 41 is made of CFRP, it is possible to stably suppress the rim 11 from being deformed left and right (width direction Y) by increasing the strength. In addition, the centrifugal force acting on the lid portion 41 can be reduced by reducing the weight of the CFRP, and it is possible to enhance the comfort during traveling as well as the effect of facilitating the lid portion 41 to be fastened to the rim 11.

  Moreover, the cover part 41 inclines so that it may become a downward slope in the width direction Y toward the hump part H2 side from the hump part H1 side. As a result, a substantially concave portion 34 is formed on the hump portion H2 side of the lid portion 41 toward the inner side Z2 in the radial direction Z. The concave portion 34 can function as a well portion for facilitating the attachment / detachment of the tire 20.

  The lid portion 41 includes a boundary portion 33a between the hump portion H1 and the inner side upper end of the recessed portion 31, upper ends 33c, 33d, and 33e of the partition walls 31d to 31f, and an outer side of the hump portion H2 and the recessed portion 31. At the boundary 33b with the upper end, it is fixed via an adhesive. In addition, as an adhesive agent, an epoxy resin type thing can be used, for example. Note that the adhesive is not limited to the above-described adhesive as long as it can bond CFRP and metal (such as an aluminum alloy). Moreover, if the cover part 41 is lightweight, since the centrifugal force which acts on the cover part 41 will become small, adhesion | attachment of the cover part 41 will become difficult to peel.

FIG. 2 is a partially cutaway perspective view of the vehicle wheel according to the first embodiment.
As shown in FIG. 2, partition walls 31 d to 31 f are formed in the recessed portion 31 of the rim 11 at intervals in the width direction. FIG. 2 illustrates a state in which a part of the lid 41 is notched and a part of the recesses 32a to 32d defined by the partition walls 31d to 31f is exposed. The recesses 32a to 32d (partition walls 31d to 31f) are formed in an annular shape over the outer peripheral surface 11s (see FIG. 1) of the rim 11 over 360 degrees.

  As a processing method of the recesses 32a to 32d in such a vehicle wheel 1A, for example, cutting can be employed. By adopting the cutting process in this way, the shape change in the recessed portion 31 is facilitated, and the design change is facilitated. In addition, as a processing method of the recessed parts 32a-32d, it is not limited to cutting, Casting may be sufficient. If it is casting, cutting can be omitted.

  In the vehicle wheel 1 </ b> A configured as described above, the auxiliary air chambers SC <b> 1, SC <b> 2, SC <b> 3, SC <b> 4 (see FIG. 1) are formed in an annular shape along the circumferential direction X over 360 degrees. For this reason, the capacity | capacitance of each sub-air chamber SC1, SC2, SC3, SC4 can be ensured large.

  Further, since the recess 31 and the partition walls 31d to 31f can be integrally formed of metal by cutting or casting, the rigidity of the sub air chambers SC1, SC2, SC3, and SC4 is made as compared with the case of forming with a synthetic resin. Can be increased. This eliminates the need to form reinforcing columns in the auxiliary air chambers SC1, SC2, SC3, SC4. As a result, a large capacity of the auxiliary air chambers SC1, SC2, SC3, and SC4 can be secured, and air column resonance (road noise) can be more effectively reduced.

FIG. 3 is a front view of the vehicle wheel according to the first embodiment. In FIG. 3, the positions of the sub air chambers SC1, SC2, SC3, and SC4 are schematically shown by solid lines, and the other portions are shown by two-dot chain lines.
As shown in FIG. 3, a communication hole 42 a (see FIG. 1, see arrow A <b> 1 in FIG. 3) for communicating the auxiliary air chamber SC <b> 1 and the tire air chamber MC (see FIG. 1) is formed in the lid portion 41. Yes. Further, the lid portion 41 is formed with a communication hole 42b (see arrow A2) that allows the auxiliary air chamber SC2 and the tire air chamber MC (see FIG. 1) to communicate with each other. Further, the lid portion 41 is formed with a communication hole 42c (see arrow A3) that allows the auxiliary air chamber SC3 and the tire air chamber MC (see FIG. 1) to communicate with each other. Further, the lid portion 41 is formed with a communication hole 42d (see arrow A4) that allows the auxiliary air chamber SC4 and the tire air chamber MC (see FIG. 1) to communicate with each other.

  The communication holes 42a to 42d are formed at intervals of 90 degrees in the circumferential direction X. The sub air chambers SC1, SC2, SC3, and SC4 match the resonance frequency of the tire air chamber MC with the resonance frequency of the sub air chambers SC1, SC2, SC3, and SC4. Thereby, since an antiphase resonance can be formed, the resonance of the tire air chamber MC can be reduced. In FIG. 1, the shapes of the communication holes 42 a to 42 d are illustrated in a simplified manner, but the shapes (diameter, length, etc.) of the communication holes 42 a to 42 d can be appropriately changed according to the resonance frequency. .

  As described above, the vehicle wheel 1A according to the first embodiment is a vehicle wheel 1A in which the auxiliary air chambers SC1, SC2, SC3, and SC4 as Helmholtz resonators are provided on the outer peripheral surface 11s of the rim 11. The rim 11 includes a hump portion H1 and a hump portion H2 that protrude outward Z1 (radially outer side) in the radial direction Z in a cross-sectional view in the width direction Y (cross-sectional view in the width direction), and a hump portion H1 and a hump portion H2. A recessed portion 31 formed therebetween, and a lid portion 41 that forms the auxiliary air chambers SC1, SC2, SC3, and SC4 by closing the recessed portion 31 from the outer peripheral side of the rim 11 are provided. As a result, the sub air chambers SC1, SC2, SC3, SC4 are formed so as to close the recess 31 with the lid portion 41, so that the capacity of the sub air chambers SC1, SC2, SC3, SC4 can be largely secured. It becomes possible to reduce air column resonance sound (road noise). Further, by fixing the hump portion H1 and the hump portion H2 so as to bridge with the lid portion 41, the rigidity of the vehicle wheel 1A is increased, and the curved portions R1, R2 of the recess portion 31 (see FIG. 1). ) Can be reduced, so that the comfort of the vehicle during travel can be improved.

  Further, in the first embodiment, communication holes 42a to 42d that connect the tire air chamber MC and the sub air chambers SC1, SC2, SC3, and SC4 are formed in the lid portion 41 (see FIG. 1). By the way, when four sub air chambers SC1, SC2, SC3, and SC4 are formed side by side in the width direction Y, between the sub air chambers SC1 and SC2, between the sub air chambers SC2 and SC3, and between the sub air chambers SC3 and SC4. It becomes difficult to form a communication hole in the. Therefore, in the first embodiment, by forming the communication holes 42a to 42d in the lid portion 41, it becomes easy to form the communication holes 42a to 42d in the auxiliary air chambers SC1, SC2, SC3, and SC4.

  In the first embodiment, the lid 41 is made of carbon fiber reinforced plastic (CFRP). According to this, since the rigidity (strength) of the lid portion 41 can be increased, when applied to the vehicle wheel 1A to which the tire 20 is attached, the rigidity of the vehicle wheel 1A can be improved and the vehicle can be comfortably driven. Can increase the sex. Further, the lid 41 can be further reduced in weight, the centrifugal force acting on the lid 41 can be reduced, and the lid 41 can be easily fastened to the rim 11.

  Moreover, in 1st Embodiment, the cover part 41 is formed in the substantially cylindrical shape (refer FIG. 2 and FIG. 3). According to this, the rigidity of the vehicle wheel 1A can be increased when the lid portion 41 is attached to the recessed portion 31 as compared with the case where the lid portion 41 is divided and formed, thereby further improving the comfort during traveling. Can be increased.

  Moreover, in 1st Embodiment, the partition walls 31d-31f are integrally formed with the rim | limb 11 in the recessed part 31 (refer FIG. 1). According to this, since it can form integrally with metals, such as aluminum alloy, it becomes unnecessary to form many support | pillars in the inside like the case where it forms with resin. Thereby, the capacity | capacitance of sub air chamber SC1, SC2, SC3, SC4 can be increased, and an air column resonance sound (road noise) can be reduced more effectively in a wheel.

(Second Embodiment)
FIG. 4 is a cross-sectional view of the vehicle wheel according to the second embodiment, and FIG. 5 is a front view of the vehicle wheel according to the second embodiment. Note that in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
As shown in FIG. 4, in the vehicle wheel 1 </ b> B of the second embodiment, a partition wall 31 g extending from the bottom surface portion 31 a of the recess portion 31 toward the outer side Z <b> 1 in the radial direction Z is formed integrally with the rim 11. The partition wall 31 g is formed at the approximate center in the width direction Y of the recess 31. Thereby, the recessed part 31 is divided into two recessed parts 32e and 32f.

  The lid portion 41 is configured by a plate-like member in the cross-sectional view in the width direction Y (cross-sectional view in the width direction), and connects the hump portion H1 and the hump portion H2 and closes the recess portion 31 from the outer peripheral side of the rim 11. Thus, the auxiliary air chambers SC5 and SC6 are formed. The lid 41 extends in the circumferential direction X and is formed in an annular shape around the rotation axis O (see FIG. 5).

  Moreover, the cover part 41 inclines so that it may become a downward slope in the width direction Y toward the hump part H2 side from the hump part H1 side. As a result, a substantially concave portion 34 is formed on the hump portion H2 side of the lid portion 41 toward the inner side Z2 in the radial direction Z. The concave portion 34 can function as a well portion for facilitating the attachment / detachment of the tire 20.

  As shown in FIG. 5, the lid portion 41 has a communication hole 42e (see FIG. 4) for communicating the sub air chamber SC5 and the tire air chamber MC, and a communication hole for communicating the sub air chamber SC5 and the tire air chamber MC. 42f is formed. When the communication hole 42e is formed at a position indicated by an arrow A5 in FIG. 5, the communication hole 42f is a position rotated by 90 ° in the circumferential direction X with respect to the communication hole 42e, as indicated by an arrow A6 in FIG. In other words, the phase is formed at a position shifted by 90 °. As described above, even when the auxiliary air chambers SC5 and SC6 are provided and the communication holes 42e and 42f are provided at a 90 degree phase, the resonance of the tire air chamber MC can be reduced as in the first embodiment. .

  In the vehicle wheel 1 </ b> B according to the second embodiment configured as described above, auxiliary air chambers SC <b> 5 and SC <b> 6 as Helmholtz resonators are provided on the outer peripheral surface 11 s of the rim 11. The rim 11 includes a hump portion H1 and a hump portion H2 that protrude outward Z1 (radially outer side) in the radial direction Z in a cross-sectional view in the width direction Y (cross-sectional view in the width direction), and a hump portion H1 and a hump portion H2. A recess 31 formed therebetween and a lid 41 that forms the auxiliary air chambers SC5 and SC6 by closing the recess 31 from the outer peripheral side of the rim 11 are provided (see FIG. 4). As a result, the sub air chambers SC5 and SC6 are formed so as to close the recess 31 with the lid portion 41, so that a sufficient capacity of the sub air chambers SC5 and SC6 can be secured, and air column resonance sound (road noise) ) Can be effectively reduced. Further, by fixing the hump portion H1 and the hump portion H2 so as to bridge with the lid portion 41, the rigidity is increased, and the bending portions R1 and R2 (see FIG. 4) of the concave portion 31 are deformed. Since it can reduce, the comfort at the time of driving | running | working can be improved.

  In the second embodiment, communication holes 42e and 42f that connect the tire air chamber MC and the auxiliary air chambers SC5 and SC6 are formed in the lid portion 41 (see FIGS. 4 and 5). According to this, the communication holes 42e and 41f can be formed more easily than when formed in the metal on the rim 11 side.

  In the second embodiment, a partition wall 31g is formed integrally with the rim 11 in the recess 31 (see FIG. 4). Thereby, the rigidity of sub air chamber SC5, SC6 can be improved, and also a manufacturing process can be simplified rather than the case of the partition walls 31d-31f of 1st Embodiment.

  In the second embodiment, since the two auxiliary air chambers SC5 and SC6 are formed (see FIG. 4), the four auxiliary air chambers SC1, SC2, SC3 and SC4 are used as in the first embodiment. In comparison, the capacity of one auxiliary air chamber can be further increased. Thereby, air column resonance sound (road noise) can be effectively reduced.

  In the second embodiment, similarly to the first embodiment, the lid portion 41 can be reduced in weight and the centrifugal force acting on the lid portion 41 can be reduced, so that the lid portion 41 can be easily fastened to the rim 11.

(Third embodiment)
FIG. 6 is a cross-sectional view of the vehicle wheel according to the third embodiment, and FIG. 7 is a front view of the vehicle wheel according to the third embodiment.
As shown in FIG. 6, the vehicle wheel 1 </ b> C of the third embodiment is provided with auxiliary air chambers SC <b> 7, SC <b> 8, SC <b> 8, SC <b> 10 as Helmholtz resonators on the inner peripheral surface 11 t of the rim 11.

  The rim 11 includes a hump portion H1 (first hump portion) and a hump portion H2 (second hump portion), and a recessed portion 51 having a shape recessed toward the outer side Z1 in the radial direction Z. A lid 61 is attached to the recess 51 so as to close the recess 51 from the inner peripheral side of the rim 11.

  The recess 51 is formed so that the concave surface faces the inner side Z2 in the radial direction Z, extends in the circumferential direction X, and is formed in an annular shape around the rotation axis O (see FIG. 7).

  Further, the recessed portion 51 is located between the hump portion H1 and the hump portion H2. Further, the recess 51 includes a bottom surface portion (top surface portion) 51a extending in the width direction Y in a cross-sectional view in the width direction Y, and a side surface portion 51b extending from the inner side end of the bottom surface portion 51a toward the hump portion H1. And a side surface 51c extending from the outer end of the bottom surface 51a toward the hump H2.

  Further, partition walls 51 d, 51 e, 51 f extending from the bottom surface 51 a toward the inner side Z <b> 2 in the radial direction Z are formed integrally with the rim 11 in the recess 51. The partition walls 51d to 51f are formed with an interval in the width direction Y. Thereby, the recessed part 51 is divided into four recessed parts 52a, 52b, 52c, 52d.

  Further, the inner side partition wall 51d is formed with the lowest height (the shortest length) from the bottom surface portion 51a. The outer-side partition wall 51f is formed with the highest height (the longest length) from the bottom surface portion 31a. The central partition wall 51e is formed at a height (length) between the partition wall 51d and the partition wall 51f. That is, the partition walls 51d to 51f are configured to increase in height from the inner side toward the outer side.

  The lid portion 61 is formed of a plate-like member in a cross-sectional view in the width direction Y, and closes the entire concave portions 52a to 52d of the concave portion 51 from the inner peripheral side of the rim 11, whereby the auxiliary air chambers SC7, SC8, SC9, It is configured to form SC10. The auxiliary air chambers SC7, SC8, SC9, and SC10 are formed side by side in the width direction Y. Moreover, the cover part 61 is extended in the circumferential direction X (refer FIG. 7), and is cyclically | annularly formed centering | focusing on the rotating shaft O (refer FIG. 7).

  The lid 61 is formed in a position where the outer side (disk 12 side) end 61 a substantially overlaps the hump H 2 in the radial direction Z in the width direction Y. The lid 61 is formed longer in the width direction Y on the inner side (the side opposite to the disk 12) than the position where the inner end 61b overlaps the hump H1 in the radial direction Z. That is, the vehicle wheel 1 </ b> C has high rigidity at the outer disk 12, and has low rigidity because it is not supported on the inner side. Therefore, the rigidity of the vehicle wheel 1C can be increased by extending and fixing the lid portion 61 made of CFRP or the like longer to the inner side than to the outer side. Thus, the comfort at the time of driving | running | working of a vehicle can be improved because the rigidity of the wheel 1B for vehicles is improved.

  The lid 61 includes an inner peripheral surface 11t of the rim 11 corresponding to the bead sheet 11a, lower ends (tips) 53c to 53e of the partition walls 51d to 51f, and an inner peripheral surface 11t of the rim 11 corresponding to the hump portion H2. And are fixed via an adhesive.

  As shown in FIG. 7, a communication hole 52 a (see FIG. 6, see arrow A <b> 7 in FIG. 7) for communicating the sub air chamber SC <b> 7 and the tire air chamber MC (see FIG. 6) is formed in the recess 51. Yes. The recess 51 is formed with a communication hole 52b (see arrow A8 in FIG. 7) that allows the auxiliary air chamber SC8 and the tire air chamber MC (see FIG. 6) to communicate with each other. The recess 51 is formed with a communication hole 52c (see arrow A9 in FIG. 7) that allows the auxiliary air chamber SC9 and the tire air chamber MC (see FIG. 6) to communicate with each other. The recess 51 is formed with a communication hole 52d (see arrow A10 in FIG. 7) that allows the auxiliary air chamber SC10 and the tire air chamber MC (see FIG. 6) to communicate with each other. The communication holes 52b to 52d are also formed in the same manner as the communication hole 52a shown in FIG.

  The communication holes 52a to 52d are formed at intervals of 90 degrees in the circumferential direction X. The auxiliary air chambers SC7, SC8, SC9, and SC10 match the resonance frequency of the tire air chamber MC (see FIG. 6) with the resonance frequency of the auxiliary air chambers SC7, SC8, SC9, and SC10. Thereby, an antiphase resonance can be formed and the resonance of the tire air chamber MC can be reduced. In FIG. 6, the shapes of the communication holes 52 a to 52 d are illustrated in a simplified manner, but the shapes (diameter, length, etc.) of the communication holes 52 a to 52 d can be appropriately changed according to the resonance frequency. .

  As described above, in the vehicle wheel 1C of the third embodiment, the auxiliary air chambers SC7, SC8, SC9, and SC10 as Helmholtz resonators are provided on the inner peripheral surface 11t of the rim 11. The rim 11 includes a hump portion H1 and a hump portion H2 that protrude outward Z1 (radially outer side) in the radial direction Z in a cross-sectional view in the width direction Y (cross-sectional view in the width direction), and a hump portion H1 and a hump portion H2. And a lid portion 61 that forms the auxiliary air chambers SC7, SC8, SC9, and SC10 by closing the recess portion 51 from the inner peripheral side of the rim 11 (see FIG. 6). ). As a result, the sub air chambers SC7, SC8, SC9, and SC10 are formed so as to close the recess 51 with the lid portion 61, so that the capacity of the sub air chambers SC7, SC8, SC9, and SC10 can be sufficiently secured. When applied to the tire 20, air column resonance (road noise) can be effectively reduced. Further, by fixing the recessed portion 51 so as to be bridged by the lid portion 61, the rigidity of the vehicle wheel 1 </ b> C is increased and bending deformation of the curved portions R <b> 3 and R <b> 4 (see FIG. 6) of the recessed portion 51 is reduced. Therefore, it is possible to improve the comfort during traveling.

  In the third embodiment, the lid 61 is formed such that the side opposite to the disk 12 (the side opposite to the disk surface) extends longer in the width direction Y than the disk 12 side (the disk surface side). (See FIG. 6). According to this, the rigidity of the wheel can be increased by forming the lid portion 61 opposite to the disk 12 whose rigidity is weakened, thereby further improving the comfort during running.

  In the third embodiment, communication holes 52a to 52d that connect the tire air chamber MC (see FIG. 6) and the sub air chambers SC7, SC8, SC9, and SC10 are formed in the recessed portion 51 (rim 11). (See FIG. 6). According to this, by forming the communication holes 52a to 52d in the metal portion, it is possible to increase the accuracy of processing, and it is easy to perform processing such as the length and cross section of the hole effective in frequency. Moreover, when the cover part 61 is formed by CFRP etc., the strength reduction of the cover part 61 by forming the communication holes 52a-52d in CFRP can be prevented.

  In the third embodiment, the lid 61 is made of carbon fiber reinforced plastic (CFRP). According to this, since the rigidity (strength) of the lid portion 61 can be increased, the rigidity of the vehicle wheel 1 </ b> C can be improved even when applied to the vehicle wheel 1 </ b> C fitted with the tire 20. Comfort can be increased.

  Moreover, in 3rd Embodiment, the cover part 61 is formed in the substantially cylindrical shape (refer FIG. 7). According to this, the rigidity of the vehicle wheel 1 </ b> C can be increased and the steering stability of the vehicle can be further improved as compared with the case where the lid portion 61 is divided and formed.

  Moreover, in 3rd Embodiment, when the centrifugal force acts with respect to the cover part 61 by closing the recessed part 51 with the cover part 61 from the inner peripheral side of the rim | limb 11, centrifugal force is the direction which closes the cover part 61. Therefore, the lid portion 61 is less likely to be detached from the rim 11 as compared to the case where the recessed portion 31 is closed with the lid portion 41 from the outer peripheral side of the rim 11 as in the first embodiment and the second embodiment.

  Furthermore, in the third embodiment, the CFRP can be exposed to the outside of the vehicle wheel 1C, so that the design can be improved.

(Fourth embodiment)
FIG. 8 is a cross-sectional view of the vehicle wheel according to the fourth embodiment, and FIG. 9 is a front view of the vehicle wheel according to the fourth embodiment.
As shown in FIG. 8, in the vehicle wheel 1 </ b> D of the fourth embodiment, a partition wall 51 g extending from the bottom surface portion 51 a of the recessed portion 51 toward the inner side Z <b> 2 in the radial direction Z is formed integrally with the rim 11. The partition wall 51 g is formed at the approximate center in the width direction Y of the recess 51. Thereby, the recessed part 51 is divided into two recessed parts 32e and 32f.

  The lid portion 61 is configured by a plate-like member in the cross-sectional view in the width direction Y (cross-sectional view in the width direction), and connects the hump portion H1 and the hump portion H2 and closes the recessed portion 51 from the inner peripheral side of the rim 11. Thus, the auxiliary air chambers SC11 and SC12 are formed. The sub air chambers SC11 and SC12 are formed side by side in the width direction Y. The lid 61 extends in the circumferential direction X, and is formed in an annular shape around the rotation axis O (see FIG. 9). Moreover, the cover part 61 inclines so that it may become a downward slope toward the hump part H2 side in the width direction Y from the hump part H1 side.

  As shown in FIG. 9, the lid portion 61 has a communication hole 52e (see FIG. 8, see arrow A11 in FIG. 9) for communicating the auxiliary air chamber SC11 and the tire air chamber MC, the auxiliary air chamber SC12 and the tire air chamber. A communication hole 52f (see arrow A12 in FIG. 9) for communicating with the MC is formed. When the communication hole 52e is formed at a position indicated by an arrow A11 in FIG. 9, the communication hole 52f is a position rotated by 90 ° in the circumferential direction X with respect to the communication hole 52e, as indicated by an arrow A12 in FIG. In other words, the phase is formed at a position shifted by 90 °.

  In the vehicle wheel 1D of the fourth embodiment configured as described above, auxiliary air chambers SC11 and SC12 as Helmholtz resonators are provided on the inner peripheral surface 11t of the rim 11. The rim 11 includes a hump portion H1 and a hump portion H2 that protrude outward Z1 (radially outer side) in the radial direction Z in a cross-sectional view in the width direction Y (cross-sectional view in the width direction), and a hump portion H1 and a hump portion H2. A recessed portion 51 formed therebetween, and a lid portion 61 that forms the auxiliary air chambers SC11 and SC12 by closing the recessed portion 51 from the inner peripheral side of the rim 11 are provided. As a result, the sub air chambers SC11 and SC12 are formed so as to close the recess 51 with the lid portion 61, so that the capacity of the sub air chambers SC11 and SC12 can be sufficiently secured, and air column resonance sound (road noise) ) Can be effectively reduced. Further, by fixing both ends of the recess 51 in the width direction Y so as to be bridged by the lid 61, the rigidity is increased, and bending deformation of the curved portions R3 and R4 (see FIG. 8) of the recess 51 is reduced. Therefore, the comfort during running can be improved.

  In the fourth embodiment, communication holes 52e and 52f that connect the tire air chamber MC and the sub air chambers SC11 and SC12 are formed in the recess 51 (rim 11). According to this, the communication holes 52e and 52f can be formed more easily than when formed on the rim 11 side. Further, by forming the communication holes 52e and 52f in the metal portion, it is possible to improve the accuracy of processing, and it becomes easy to perform processing such as the length and cross section of the hole effective in frequency. Moreover, when the cover part 61 is formed by CFRP etc., the strength reduction of the cover part 61 by forming a communicating hole in CFRP can be prevented.

(Fifth embodiment)
FIG. 10 is a cross-sectional view of the vehicle wheel according to the fifth embodiment, FIG. 11 is a front view showing the vehicle wheel according to the fifth embodiment, and FIG. 12 is a view in the direction of arrow B in FIG.
As shown in FIG. 10, the vehicle wheel 1 </ b> E according to the fifth embodiment has a secondary air chamber SC <b> 13 as a Helmholtz resonator provided on the outer peripheral surface 11 s of the rim 11.

  The recessed portion 31 is formed so that the recessed surface faces the outer side Z1 in the radial direction Z, extends in the circumferential direction X (see FIG. 11), and is formed in an annular shape around the rotation axis O (see FIG. 11). In the fifth embodiment, the partition wall extending in the circumferential direction X is not formed in the recessed portion 31.

  The lid portion 81 is formed of a plate-like member in the cross-sectional view in the width direction Y (cross-sectional view in the width direction), and connects the hump portion H1 and the hump portion H2 and closes the recess portion 31 to thereby close the auxiliary air chamber SC13. It is configured to form.

  As shown in FIG. 11, the lid portion 81 has an arc portion 81 a extending in the circumferential direction, and extends in a direction orthogonal to the circumferential direction at both ends of the arc portion 81 a, and is substantially closed by the arc portion 81 a and the recessed portion 31. And end surface portions 81b and 81c.

  Moreover, the cover part 81 is formed in four places at intervals in the circumferential direction. The lid 81 is formed at an angle of approximately 90 degrees. Moreover, the cover parts 81 adjacent in the circumferential direction are arranged close to each other (with a gap in the circumferential direction).

  As shown in FIG. 12, a notch portion 82 is formed in the end surface portion 81 b of the lid portion 81. A gap formed between the end surface portion 81b and the recessed portion 31 is configured as a communication hole 83 that allows the auxiliary air chamber SC13 and the tire air chamber MC to communicate with each other. By changing the shape of the notch 82, the size of the communication hole 83 changes, and the resonance frequency can be changed.

  Further, the vehicle wheel 1E as viewed in the direction B1 in FIG. 11 is formed with a communication hole 83 that allows the auxiliary air chamber SC14 and the tire air chamber MC to communicate with each other, as in FIG. Similarly, the vehicle wheel 1E as viewed in the direction B2 in FIG. 11 is formed with a communication hole 83 that allows the auxiliary air chamber SC15 and the tire air chamber MC to communicate with each other. Similarly, the vehicle wheel 1E as viewed in the direction of the arrow B3 in FIG. 11 is formed with a communication hole 83 that allows the auxiliary air chamber SC16 and the tire air chamber MC to communicate with each other.

  In the vehicle wheel 1E of the fifth embodiment configured as described above, auxiliary air chambers SC13, SC14, SC15, and SC16 as Helmholtz resonators are provided on the outer peripheral surface 11s of the rim 11. The rim 11 includes a hump portion H1 and a hump portion H2 that protrude outward Z1 (radially outer side) in the radial direction Z in a cross-sectional view in the width direction Y (cross-sectional view in the width direction), and a hump portion H1 and a hump portion H2. A recessed portion 31 formed therebetween, and a lid portion 81 that forms the auxiliary air chambers SC13, SC14, SC15, SC16 by closing the recessed portion 31 from the outer peripheral side of the rim 11 are provided. Thus, the sub air chambers SC13, SC14, SC15, and SC16 are formed so as to close the recess 31 with the lid portion 81, so that the capacity of the sub air chambers SC13, SC14, SC15, and SC16 can be sufficiently secured. The air column resonance sound (road noise) can be effectively reduced. Further, by fixing both ends of the recessed portion 31 in the width direction Y so as to be bridged by the lid portion 81, the rigidity is increased and bending deformation of the curved portions R1, R2 (see FIG. 10) of the recessed portion 31 is reduced. Therefore, the comfort during running can be improved.

  Further, in the fifth embodiment, a communication hole 83 that communicates between the tire air chamber MC and the sub air chambers SC13, SC14, SC15, SC16 is formed (see FIG. 12). According to this, since it is not necessary to open the communication hole 83 in the recessed part 31, the manufacturing process of a communication hole is simplified, and since it is not necessary to open the communication hole 83 in the cover part 81, when the cover part 81 is CFRP, There is no reduction in strength due to the opening of holes.

  In the fifth embodiment, the case where the auxiliary air chambers SC13, SC14, SC15, and SC16 are separated from each other by the lid 81 has been described as an example. However, as shown in the modified example of FIG. An arc portion 81a of 81 may be formed in an annular shape, and an end face portion 81d that partitions adjacent sub-air chambers SC13, SC14 (SC14, SC15 / SC15, SC16 / SC16, SC13) may be formed. Thus, by forming the lid portion 81 from an arc shape to an annular shape, the rigidity of the vehicle wheel 1E is increased, and the bending deformation of the curved portions R1, R2 (see FIG. 10) of the recessed portion 31 is reduced. Therefore, the comfort when the vehicle is running can be improved.

  In the fifth embodiment, since the lid 81 can be reduced in weight by configuring the lid 81 with CFRP or the like, the centrifugal force acting on the lid 81 can be reduced. It becomes difficult to peel off.

(Sixth embodiment)
FIG. 14 is a cross-sectional view of the vehicle wheel according to the sixth embodiment, and FIG. 15 is a front view of the vehicle wheel according to the sixth embodiment.
As shown in FIG. 14, the vehicle wheel 1 </ b> F according to the sixth embodiment includes auxiliary air chambers SC <b> 17, SC <b> 18, SC <b> 19, SC <b> 20 as Helmholtz resonators provided on the outer peripheral surface 11 s of the rim 11.

  The recess 31 accommodates a container 91 that constitutes the auxiliary air chambers SC17, SC18, SC19, and SC20. In addition, the capacity | capacitance of subair chamber SC17, SC18, SC19, SC20 is securable by making the cross-sectional shape of the container 91 into the shape along the cross-sectional shape of the recessed part 31. However, the cross-sectional shape of the container 91 is not limited to the shape along the recessed portion 31, and may be other shapes such as a rectangular shape as shown in FIG.

  The container 91 can be formed by blow molding a synthetic resin material. The container 91 is not limited to a resin molded product, and can be formed of other materials such as metal. In the case of resin, light weight and high rigidity can be blow-molded in consideration of weight reduction, mass productivity improvement, production cost reduction, airtightness securing of sub air chambers SC17, SC18, SC19, SC20, etc. New resin is desirable. Among these, polypropylene that is resistant to repeated bending fatigue is particularly desirable.

  Further, the container 91 is formed with a communication hole 93 for communicating the auxiliary air chambers SC17, SC18, SC19, SC20 and the tire air chamber MC. The communication hole 93 is formed on one side surface 91 a in the circumferential direction of the container 91. Thereby, since it is not necessary to form the communication hole 93 in the cover part 92, the rigidity of the cover part 92 (for example, CFRP) does not fall.

  The communication hole 93 may be at any other position as long as it allows the auxiliary air chambers SC17, SC18, SC19, SC20 and the tire air chamber MC to communicate with each other. For example, the other side surface (in the circumferential direction) or the bottom surface of the container 91 may be used, or the lid portion 92 may be used.

  The lid portion 92 is configured by a plate-like member in the cross-sectional view in the width direction Y (cross-sectional view in the width direction), and connects the hump portion H1 and the hump portion H2 and closes the recessed portion 31 from the outer peripheral side of the rim 11. Yes. Moreover, the cover part 92 can be made lightweight and high-strength by being formed of CFRP, and the weight of the vehicle wheel 1F can be reduced.

  As shown in FIG. 15, a molded body in which the container 91 and the lid portion 92 are integrally molded is formed, and the molded body is arranged at four positions with a gap in the circumferential direction X in the recessed portion 31. Further, the molded body is formed in an arc shape having an angle of about 70 degrees in the front view of FIG.

  In addition, the length of the lid portion 92 in the circumferential direction X is longer than the length of the container 91 in the circumferential direction X. Thereby, by forming the cover part 92 long, the bending deformation of the recessed part 31 can be reduced, and steering stability can be improved.

  In the vehicle wheel 1F of the sixth embodiment configured as described above, auxiliary air chambers SC17, SC18, SC19, and SC20 as Helmholtz resonators are provided on the outer peripheral surface 11s of the rim 11. The rim 11 includes a hump portion H1 and a hump portion H2 that protrude outward Z1 (radially outer side) in the radial direction Z in a cross-sectional view in the width direction Y (cross-sectional view in the width direction), and a hump portion H1 and a hump portion H2. A concave portion 31 formed between them, a container 91 which is arranged in the concave portion 31 and forms the auxiliary air chambers SC17, SC18, SC19, SC20, and the auxiliary air chambers SC17, SC18, SC19, And a lid portion 92 that forms the SC 20. Accordingly, the auxiliary air chambers SC17, SC18, SC19, and SC20 are formed so as to close the recess 31 with the lid portion 92 from the outer peripheral side of the rim 11, so that the capacity of the auxiliary air chambers SC17, SC18, SC19, and SC20 is sufficient. The air column resonance sound (road noise) can be effectively reduced. In addition, by fixing both ends of the recess 31 in the width direction Y so as to be bridged by the lid 92, the rigidity can be increased and the bending deformation of the curved portions R1, R2 of the recess 31 can be reduced. , You can improve the comfort during running.

  Further, in the sixth embodiment, the present invention can be applied to the recess portion 31 (well portion) of a conventional (ordinary) vehicle wheel, and the auxiliary air chambers SC17, SC18, SC19, and SC20 can be easily configured.

  In the sixth embodiment, a communication hole 93 that connects the tire air chamber MC and the sub air chambers SC17, SC18, SC19, and SC20 is formed. According to this, since it is not necessary to open the communication hole 93 in the recessed part 31, the manufacturing process of a communication hole can be simplified, and since it is not necessary to open the communication hole 93 in the cover part 92, when the cover part 92 is CFRP, There is no reduction in strength due to the perforation.

  As mentioned above, although this embodiment was described, this invention is not limited to the said embodiment, It can implement with a various form. For example, in the first, second, fifth, and sixth embodiments, the lid portions 41, 81, and 92 are formed so as to connect the hump portion H1 and the hump portion H2, but the lid portions 41, 81, and 92 are formed. May be formed so as to connect the middle of the side surface portion 31b and the middle of the side surface portion 31c.

  In the fifth embodiment and the sixth embodiment, the case where the recess 31 is formed on the outer peripheral surface 11s of the rim 11 has been described as an example. However, as in the third embodiment and the fourth embodiment, the rim 11 may be applied to the inner peripheral surface 11t of the eleventh, and may be formed of a lid 81, a container 91, and a lid 92.

  In the fifth and sixth embodiments, the case where the auxiliary air chambers SC13, SC14, SC15, and SC16 (auxiliary air chambers SC17, SC18, SC19, and SC20) are provided at four locations has been described as an example. In addition, a configuration may be adopted in which auxiliary air chambers arranged with the phase shifted by 90 degrees are provided at two locations.

1A, 1B, 1C, 1D, 1E, 1F Vehicle wheel 11 Rim 11a, 11b Bead seat 11s Outer peripheral surface 11t Inner peripheral surface 12 Disc 13 Body portion 31, 51 Recessed portion 31d, 31e, 31f, 31g, 51d, 51e, 51f, 51g Partition wall 41, 61, 81, 92 Lid 42a, 42b, 42c, 42d, 42e, 42f, 52a, 52b, 52c, 52d, 52e, 52f, 83, 93 Communication hole 91 Container H1 hump (first (1 hump part)
H2 hump part (second hump part)
X Wheel circumferential direction (circumferential direction)
Y Wheel width direction (width direction)
Z Wheel radial direction (radial direction)
SC1, SC2, SC3, SC4, SC5, SC6, SC7, SC8, SC9, SC10, SC11, SC12, SC13, SC14, SC15, SC16, SC17, SC18, SC19, SC20 Secondary air chamber MC Tire air chamber

Claims (9)

A vehicle wheel provided with a secondary air chamber as a Helmholtz resonator on the outer peripheral surface of the rim,
In the cross-sectional view in the width direction, the rim,
A first hump portion and a second hump portion protruding outward in the radial direction;
A recess formed between the first hump portion and the second hump portion;
A lid that forms the auxiliary air chamber by closing the recess from the outer periphery of the rim;
A vehicle wheel comprising:   The vehicle wheel according to claim 1, wherein a communication hole that communicates a tire air chamber and the auxiliary air chamber is formed in the lid portion. A vehicle wheel provided with an auxiliary air chamber as a Helmholtz resonator on the inner peripheral surface of the rim,
In the cross-sectional view in the width direction, the rim,
A first hump portion and a second hump portion protruding outward in the radial direction;
A recess formed between the first hump portion and the second hump portion;
A lid that forms the auxiliary air chamber by closing the recess from the inner peripheral side of the rim;
A vehicle wheel comprising:   4. The vehicle wheel according to claim 3, wherein the lid portion extends longer in the width direction on the side opposite to the disk surface than on the disk surface side. 5.   5. The vehicle wheel according to claim 3, wherein a communication hole that communicates the tire air chamber with the auxiliary air chamber is formed in the recess.   The vehicle wheel according to any one of claims 1 to 5, wherein a partition wall partitioned in the width direction is formed integrally with the rim in the recess. A vehicle wheel provided with a secondary air chamber as a Helmholtz resonator on the outer peripheral surface of the rim,
In the cross-sectional view in the width direction, the rim,
A first hump portion and a second hump portion protruding outward in the radial direction;
A recess formed between the first hump portion and the second hump portion;
A container disposed in the recess and forming the auxiliary air chamber;
The container is fixed, and a lid for closing the dent from the outer periphery of the rim;
A vehicle wheel comprising:   The vehicle wheel according to any one of claims 1 to 7, wherein the lid portion is made of carbon fiber reinforced plastic.   The vehicle wheel according to any one of claims 1 to 8, wherein the lid portion has a substantially cylindrical shape.

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