JP2020032812A - Vehicular wheel and vehicle - Google Patents

Vehicular wheel and vehicle Download PDF

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Publication number
JP2020032812A
JP2020032812A JP2018159612A JP2018159612A JP2020032812A JP 2020032812 A JP2020032812 A JP 2020032812A JP 2018159612 A JP2018159612 A JP 2018159612A JP 2018159612 A JP2018159612 A JP 2018159612A JP 2020032812 A JP2020032812 A JP 2020032812A
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Japan
Prior art keywords
spoke
axle direction
axle
disk
rim
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JP2018159612A
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JP6806744B2 (en
Inventor
祐介 中村
Yusuke Nakamura
祐介 中村
健 佐原
Ken Sahara
健 佐原
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2018159612A priority Critical patent/JP6806744B2/en
Priority to DE102019211054.1A priority patent/DE102019211054A1/en
Priority to CN201910789159.9A priority patent/CN110861441B/en
Publication of JP2020032812A publication Critical patent/JP2020032812A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/001—Lightweight wheels, e.g. for strollers or toys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/04—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/06—Rims characterised by means for attaching spokes, i.e. spoke seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/002—Disc wheels, i.e. wheels with load-supporting disc body characterised by the shape of the disc
    • B60B3/005—Disc wheels, i.e. wheels with load-supporting disc body characterised by the shape of the disc in the section adjacent to rim
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/02—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body integral with rim
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/04—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding
    • B60B3/041—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc
    • B60B3/044—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc characterised by cross-sectional details of the attachment, e.g. the profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/10—Disc wheels, i.e. wheels with load-supporting disc body apertured to simulate spoked wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/12—Means of reinforcing disc bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/111—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/30—Increase in
    • B60B2900/311—Rigidity or stiffness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Braking Arrangements (AREA)

Abstract

To provide a vehicular wheel with a spoke part, which enables weight saving in addition to securement of necessary strength and which inhibits complication of manufacture.SOLUTION: A vehicular wheel 1 comprises a disc part 2, a rim part 3, and a plurality of spoke parts 4 for connecting the disc part 2 and the rim part 3 together. A radial inner end of the spoke part 4 is formed in the state of protruding outward in an axle direction with respect to the disc part 2, and extended inward in a radial direction with respect to an outer peripheral edge of the disc part 2. On an axial inside surface, a concave thickness-reduced part 13 is provided astride the spoke part 4 and the disc part 2.SELECTED DRAWING: Figure 1

Description

本開示は、車軸回りに配置されたディスク部と、タイヤが取り付けられるリム部と、ディスク部及びリム部間を連結するスポーク部とを有する車両用ホイール、及び該車両用ホイールを備えた車両に関する。   The present disclosure relates to a vehicle wheel having a disc portion disposed around an axle, a rim portion to which a tire is attached, and a spoke portion connecting the disc portion and the rim portion, and a vehicle including the vehicle wheel. .

ホイールには、車軸回りに配置されたディスク部、タイヤが取り付けられるリム部、並びに、ディスク部及びリム部間を連結するスポーク部を有するものがある。例えば特許文献１には、スポーク部の車軸方向の外側の面に肉抜き部を設けて軽量化し、ディスク補強部材をディスク部及びスポーク部の車軸方向の外側の面に接着させることによりホイール全体の強度及び意匠性を向上させた車両用ホイールが記載されている。   Some wheels have a disk portion arranged around an axle, a rim portion to which a tire is attached, and a spoke portion connecting the disk portion and the rim portion. For example, in Patent Document 1, a lightening portion is provided on the outer surface of the spoke portion in the axle direction to reduce the weight. A vehicle wheel with improved strength and design is described.

特開２０１６−３７０６１号公報JP 2016-37061 A

特許文献１に記載の車両用ホイールでは、ホイールの強度を確保するために、ディスク部及びスポーク部の表面に補強部材を接着させる必要があり、その製造作業が煩雑であった。このような問題に鑑み、本発明は、必要な強度を確保した上で軽量化でき、かつ、製造の煩雑化が抑制された、スポーク部を有する車両用ホイールを提供することを目的とする。   In the vehicle wheel described in Patent Literature 1, it is necessary to adhere a reinforcing member to the surfaces of the disc portion and the spoke portion in order to secure the strength of the wheel, and the manufacturing operation is complicated. In view of such a problem, an object of the present invention is to provide a vehicle wheel having a spoke portion, which can be reduced in weight while securing necessary strength, and in which production complexity is suppressed.

本発明の少なくともいくつかの実施形態は、車軸を中心とした円盤状をなし、ハブ（７）に取り付けられるべきディスク部（２）と、タイヤが取り付けられるべき円環状をなすリム部（３）と、前記ディスク部及び前記リム部を互いに結合する複数のスポーク部（４）とを備える車両用ホイールであって、前記スポーク部の半径方向の内端部が、前記ディスク部に対して車軸方向の外向きに突出形成され、かつ前記ディスク部の外周縁よりも前記半径方向の内方に延出し、前記車軸方向の内側の面において、凹状の肉抜き部（１３）が前記スポーク部及び前記ディスク部に跨がって設けられていることを特徴とする。   At least some embodiments of the present invention are disc-shaped around an axle, a disk portion (2) to be attached to a hub (7), and an annular rim portion (3) to which a tire is to be attached. And a plurality of spokes (4) for connecting the disc and the rim together, wherein a radially inner end of the spokes extends in the axle direction with respect to the disc. And protrudes outward in the radial direction from the outer peripheral edge of the disk portion. On the inner surface in the axle direction, a concave lightening portion (13) includes the spoke portion and the spoke portion. It is characterized by being provided over the disk part.

この構成によれば、スポーク部及びディスク部に跨る範囲に肉抜き部を設けることによって、応力が一部に集中することを抑制して車両用ホイールの強度及び剛性を最適化できるとともに、車両用ホイールを軽量化できる。補強用の他の部材を取り付けることなく、車両用ホイールに必要な強度を確保できるため、製造時の作業性が向上する。   According to this configuration, by providing the lightening portion in a range straddling the spoke portion and the disk portion, it is possible to suppress concentration of stress on a part and optimize the strength and rigidity of the vehicle wheel, and Wheels can be reduced in weight. Since the strength required for the vehicle wheel can be ensured without attaching another member for reinforcement, workability during manufacturing is improved.

本発明の少なくともいくつかの実施形態は、上記構成において、前記スポーク部の前記半径方向の内端部における前記車軸方向の外側の表面は、前記半径方向の内方に向かうにつれて前記車軸方向の内方に向かい、前記ディスク部の前記車軸方向の外側の表面に接続する接続面（１２）を有し、前記肉抜き部の前記半径方向の延在範囲は、前記接続面の前記半径方向の延在範囲の全体を含むことを特徴とする。   In at least some embodiments of the present invention, in the above-described configuration, the outer surface in the axle direction at the radially inner end of the spoke portion is formed such that the outer surface in the axle direction is inward in the radial direction. And a connecting surface (12) connected to the axle-side outer surface of the disk portion, wherein the radial extension range of the lightening portion extends in the radial direction of the connecting surface. It is characterized in that the entire range is included.

この構成によれば、スポーク部とディスク部との連結部分における断面変化が緩やかになり、応力集中を抑制して車両用ホイール１を軽量化できる。   According to this configuration, the cross-sectional change in the connection portion between the spoke portion and the disk portion becomes gentle, and the stress concentration can be suppressed to reduce the weight of the vehicle wheel 1.

本発明の少なくともいくつかの実施形態は、上記構成の何れかにおいて、側面視で前記ディスク部及び前記リム部に重なっていない範囲において、前記スポーク部の周方向の幅及び厚さは略一定であり、前記半径方向の外方に向かうにつれて、前記肉抜き部の周方向の幅が広くなり、及び／又は前記肉抜き部の前記車軸方向の深さが深くなることを特徴とする。   In at least some embodiments of the present invention, in any of the above-described configurations, the width and thickness of the spoke portion in the circumferential direction are substantially constant in a range not overlapping the disc portion and the rim portion in a side view. There is a feature in that the width of the lightening portion in the circumferential direction increases and / or the depth of the lightening portion in the axle direction increases toward the outside in the radial direction.

スポーク部は、半径方向の外端側（リム部側）が半径方向の内端側（ディスク部側）よりも強度上細くできるが、この構成によれば、半径方向の外方に向かうほど肉抜きの量が増えるため、強度を確保した上で軽量化が図れる。   The spoke portion can be thinner at the radially outer end side (rim portion side) than the radially inner end side (disk portion side). However, according to this configuration, the spokes become more radially outward. Since the amount of punching increases, the weight can be reduced while securing the strength.

本発明の少なくともいくつかの実施形態は、上記構成の何れかにおいて、前記スポーク部と前記リム部との連結部分において、前記スポーク部の前記半径方向の外端部は、前記リム部に対して前記リム部の前記車軸方向の外縁（３ａ）よりも前記車軸方向の外方に突出形成され、かつ前記リム部の内周縁（３ｂ）よりも前記半径方向の外方に延出していることを特徴とする。   According to at least some embodiments of the present invention, in any of the above-described configurations, in a connection portion between the spoke portion and the rim portion, the radially outer end of the spoke portion is positioned relative to the rim portion. The rim portion is formed so as to protrude outward in the axle direction from the outer edge (3a) in the axle direction, and extends outward in the radial direction from the inner peripheral edge (3b) of the rim portion. Features.

この構成によれば、スポーク部の外端部が、リム部に対して車軸方向の外方に突出しているため、スポーク部の剛性が向上する。   According to this configuration, the outer end of the spoke protrudes outward in the axle direction with respect to the rim, so that the rigidity of the spoke is improved.

本発明の少なくともいくつかの実施形態は、上記の何れかの構成の車両用ホイールと、前記ディスク部よりも前記車軸方向の内方に配置され、側面視で前記車軸を中心として円形をなすブレーキディスク（１４）とを備える車両において、前記ディスク部の外径は、前記ブレーキディスクの外径に略等しいことを特徴とする。   At least some embodiments of the present invention include a vehicle wheel having any one of the above-described configurations, and a brake that is disposed inward of the disc portion in the axle direction and has a circular shape around the axle in a side view. In a vehicle provided with a disc (14), an outer diameter of the disc portion is substantially equal to an outer diameter of the brake disc.

この構成によれば、ブレーキディスクが外部から見え難く、意匠性が向上する。また、ブレーキの摩耗粉の飛散が抑制され、車両用ホイールの車軸方向の外側の面に摩耗粉が付着することが抑制される。   According to this configuration, the brake disk is hard to be seen from the outside, and the design is improved. In addition, scattering of the wear powder of the brake is suppressed, and the wear powder is suppressed from adhering to the outer surface of the vehicle wheel in the axle direction.

本発明によれば、スポーク部を有する車両用ホイールにおいて、必要な強度が確保された上で軽量化でき、製造の煩雑化が抑制できる。   ADVANTAGE OF THE INVENTION According to this invention, in the vehicle wheel which has a spoke part, required intensity | strength can be ensured and weight can be reduced, and complication of manufacture can be suppressed.

実施形態に係るホイールの斜視図Perspective view of a wheel according to an embodiment 実施形態に係るホイール本体の車軸方向の内側（裏面側）から見た側面図FIG. 2 is a side view of the wheel body according to the embodiment as viewed from the inside (rear side) in the axle direction. Ａ：実施形態に係るホイール本体の車軸方向の外側（表面側）から見た側面図、Ｂ：Ａ図のＢ−Ｂ断面図A: side view of the wheel body according to the embodiment as viewed from the outside (front side) in the axle direction; B: BB cross-sectional view of FIG. 図３（Ａ）におけるＩＶ−ＩＶ断面図IV-IV sectional view in FIG.

以下、図面を参照して本発明の実施形態について説明する。説明に当たって前後、左右及び上下の方向は、車両の方向に従う。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description, front and rear, left and right, and up and down directions follow the direction of the vehicle.

図１〜図４に示すように、車両用ホイール１は、側面視で左右方向に延びる車軸を中心とした円形をなすディスク部２と、タイヤが取り付けられるリム部３と、ディスク部２及びリム部３を互いに連結する複数のスポーク部４とを備える。車両用ホイール１は、鋳物又は鍛造物である。   As shown in FIGS. 1 to 4, the vehicle wheel 1 includes a disk portion 2 having a circular shape centered on an axle extending in the left-right direction in a side view, a rim portion 3 to which a tire is attached, the disk portion 2 and a rim. A plurality of spoke portions 4 for connecting the portions 3 to each other. The vehicle wheel 1 is a casting or a forging.

円盤状のディスク部２は、側面視における中心を貫通するセンター孔５と、センター孔５よりも半径方向の外方において、車軸方向に貫通する５つの締結孔６とが設けられている。５つの締結孔６は、センター孔５と同心円の共通の円周上に、周方向において互いに等間隔に配置される。車両本体のハブ７（図３）の軸部がセンター孔５に嵌合し、ハブ７に設けられたボルト（図示せず）が締結孔６に挿通されてナット（図示せず）に締結されることにより、又は、ボルト（図示せず）を締結孔６に挿通してハブ７に設けられたナット部（図示せず）に締結させることにより、車両用ホイール１がハブ７に固定される。ディスク部２の車軸方向の内側の面には、締結孔６の間に軽量化のための肉抜き８が設けられている。   The disc-shaped disc portion 2 is provided with a center hole 5 penetrating the center in a side view, and five fastening holes 6 penetrating in the axle direction outside the center hole 5 in the radial direction. The five fastening holes 6 are arranged at equal intervals in the circumferential direction on a common circumference concentric with the center hole 5. A shaft portion of a hub 7 (FIG. 3) of the vehicle body fits into the center hole 5, and a bolt (not shown) provided in the hub 7 is inserted into the fastening hole 6 and fastened to a nut (not shown). The vehicle wheel 1 is fixed to the hub 7 by inserting a bolt (not shown) into the fastening hole 6 and fastening the bolt to a nut (not shown) provided on the hub 7. . On the inner surface of the disk portion 2 in the axle direction, a lightening 8 for reducing the weight is provided between the fastening holes 6.

円環状のリム部３は、車軸方向の外側に位置する第１ビードシート部９と、車軸方向の内側に位置する第２ビードシート部１０と、第１ビードシート部９及び第２ビードシート部１０の間を連結する中間部１１とを備える。第１ビードシート部９及び第２ビードシート部１０の半径方向の外側の面にはタイヤのビード（図示せず）が密着する。第１ビードシート部９が中間部１１に比べて厚肉になっていることにより、車両用ホイール１が回転する際の振動が低減され、騒音振動性能が向上する。第１ビードシート部９の車軸方向の外側の面は、半径方向の内方に向かうにつれて車軸方向の内方に向かい、かつ、車軸方向の外側に凸となるように湾曲している。   The annular rim portion 3 includes a first bead seat portion 9 located outside in the axle direction, a second bead seat portion 10 located inside in the axle direction, and a first bead seat portion 9 and a second bead seat portion. And an intermediate portion 11 connecting between the two. A bead (not shown) of the tire is in close contact with the outer surface of the first bead seat portion 9 and the second bead seat portion 10 in the radial direction. Since the first bead seat portion 9 is thicker than the intermediate portion 11, vibration when the vehicle wheel 1 rotates is reduced, and noise vibration performance is improved. The outer surface of the first bead seat portion 9 in the axle direction is curved so as to go inward in the axle direction as it goes inward in the radial direction and to protrude outward in the axle direction.

１０本のスポーク部４がディスク部２から半径方向の外方に放射状に延出してリム部３の第１ビードシート部９に連結している。１０本のスポーク部４は、車軸を中心に１０回対称形に配置される。すなわち、互いに隣り合うスポーク部４の半径方向の延長線がなす角度は等しく３６°である。   Ten spoke portions 4 extend radially outward from the disk portion 2 and are connected to the first bead seat portion 9 of the rim portion 3. The ten spokes 4 are arranged symmetrically ten times around the axle. That is, the angle formed by the radially extending lines of the adjacent spoke portions 4 is equal to 36 °.

各々のスポーク部４は、側面視で、半径方向に延びる中心線に対して左右対称形をなす。スポーク部４の車軸方向の外側の面は、概ね車軸方向に直交している。スポーク部４の半径方向の両端面の近傍を除いた部分において、スポーク部４の車軸方向の外面の周方向幅は、略一定であり、車軸方向の内面の周方向幅よりも狭くなっており、周方向の両側面は傾斜面となっている。   Each spoke 4 has a symmetrical shape with respect to a center line extending in the radial direction in a side view. The outer surface of the spoke portion 4 in the axle direction is substantially orthogonal to the axle direction. In portions other than the vicinity of both radial end surfaces of the spoke portion 4, the circumferential width of the outer surface in the axle direction of the spoke portion 4 is substantially constant, and is smaller than the circumferential width of the inner surface in the axle direction. , Both side surfaces in the circumferential direction are inclined surfaces.

スポーク部４の半径方向の内端部は、ディスク部２に対して車軸方向の外向きに突出形成され、かつディスク部２の外周縁よりも半径方向の内方に延出している。スポーク部４の半径方向の内端部における、ディスク部２に接続する車軸方向の外側の接続面１２は、半径方向の内方に向かうにつれて車軸方向の内方に向かうように傾斜又は湾曲している。   A radially inner end of the spoke portion 4 is formed so as to protrude outward in the axle direction with respect to the disk portion 2, and extends radially inward from the outer peripheral edge of the disk portion 2. The outer connection surface 12 in the axle direction at the radially inner end of the spoke portion 4 and connected to the disk portion 2 is inclined or curved so as to move inward in the axle direction as it moves inward in the radial direction. I have.

スポーク部４及びディスク部２の車軸方向の内側の面において、両者の連結部は概ね半径方向に沿って滑らかに連続しているが、スポーク部４及びディスク部２に跨る範囲に凹状の肉抜き部１３が形成されている。スポーク部４及びディスク部２に跨る範囲に肉抜き部１３を設けることによって、応力が一部に集中することを抑制して車両用ホイール１の強度及び剛性を最適化できるとともに、車両用ホイール１を軽量化できる。   On the inner surface of the spoke portion 4 and the disc portion 2 in the axle direction, the connecting portion of both is smoothly continuous substantially along the radial direction, but a concave hollow portion is formed in a range straddling the spoke portion 4 and the disc portion 2. A part 13 is formed. By providing the lightening portion 13 in a range extending over the spoke portion 4 and the disk portion 2, it is possible to suppress the concentration of stress on a part and to optimize the strength and rigidity of the vehicle wheel 1, and to improve the vehicle wheel 1. Can be reduced in weight.

肉抜き部１３は半径方向に沿って延在する。肉抜き部１３の半径方向の内端は、接続面１２よりも半径方向の内方に位置する。肉抜き部１３の半径方向の外端は、接続面１２よりも半径方向の外方、かつ、第１ビードシート部９の内周縁よりも半径方向の内方に位置する。従って、肉抜き部１３の半径方向の延在範囲は、接続面１２の半径方向の延在範囲の全体を含む。接続面１２によって、ディスク部２の車軸方向の外側の面とスポーク部４の車軸方向の外側の面との間に車軸方向に段差が生じている。この段差によってディスク部２及びスポーク部４を合わせた断面形状が急変すると、この部分に応力が集中する。しかし、肉抜き部１３の半径方向の延在範囲が、接続面１２の半径方向の延在範囲の全体を含むため、この部分の断面形状の変化が緩やかになり、応力集中を避けて車両用ホイール１を軽量化できる。   The lightening portion 13 extends in the radial direction. The radially inner end of the lightening portion 13 is located radially inward of the connection surface 12. The radially outer end of the lightening portion 13 is located radially outward from the connection surface 12 and radially inward from the inner peripheral edge of the first bead seat portion 9. Therefore, the radial extension range of the lightening portion 13 includes the entire radial extension range of the connection surface 12. Due to the connection surface 12, a step is formed in the axle direction between the outer surface of the disk portion 2 in the axle direction and the outer surface of the spoke portion 4 in the axle direction. When the sectional shape of the disc portion 2 and the spoke portion 4 together changes suddenly due to this step, stress concentrates on this portion. However, since the radially extending range of the lightening portion 13 includes the entire radially extending range of the connection surface 12, the cross-sectional shape of this portion gradually changes, and stress concentration is avoided to prevent the vehicle from being concentrated. The weight of the wheel 1 can be reduced.

また、側面視でディスク部２及びリム部３に重なっていない範囲において、スポーク部４の周方向の幅及び厚さは略一定である。肉抜き部１３の周方向の幅は、半径方向の外方に向かうにつれて拡がっている。すなわち、肉抜き部１３は、側面視で等脚台形状をなしている。なお、肉抜き部１３の周方向の幅が変化することに加えて、又は代えて、肉抜き部１３の車軸方向の深さが、半径方向の外方に向かうにつれて深くなってもよい。スポーク部４は、半径方向の外端側（リム部側）が半径方向の内端側（ディスク部側）よりも強度上細くできるため、肉抜き部を半径方向の外方に向かうにつれて大きくすることにより、強度を確保した上で軽量化できる。   Further, in a range not overlapping the disk portion 2 and the rim portion 3 in side view, the circumferential width and thickness of the spoke portion 4 are substantially constant. The width of the lightening portion 13 in the circumferential direction increases toward the outside in the radial direction. That is, the lightening portion 13 is in the shape of an equilateral trapezoid in a side view. In addition to or instead of changing the circumferential width of the lightening portion 13, the depth of the lightening portion 13 in the axle direction may be increased toward the outside in the radial direction. Since the spoke portion 4 can be thinner at the outer end side (rim side) in the radial direction than the inner end side (disk side) in the radial direction, the thickness of the lightening portion increases toward the outside in the radial direction. Thereby, the weight can be reduced while securing the strength.

スポーク部４の半径方向の外端部は、リム部３の第１ビードシート部９の車軸方向の外側の面に連結する。第１ビードシート部９の車軸方向外側の面は、半径方向の外周縁が車軸方向の外縁になるように湾曲している。スポーク部４の半径方向の外端部は、リム部３に対してリム部３の車軸方向の外縁３ａよりも車軸方向の外方に向かって突出形成され、かつリム部３の第１ビードシート部９の半径方向の内周縁３ｂよりも半径方向の外方に延出している。このように、スポーク部４の外端部が、リム部３に対して車軸方向の外方に突出していることにより、スポーク部４の剛性が向上している。   The radially outer end of the spoke portion 4 is connected to the outer surface of the first bead seat portion 9 of the rim portion 3 in the axle direction. The outer surface of the first bead seat portion 9 in the axle direction is curved such that the outer peripheral edge in the radial direction is the outer edge in the axle direction. A radially outer end of the spoke portion 4 is formed so as to protrude outward from the rim portion 3 in the axle direction beyond the outer edge 3a of the rim portion 3 in the axle direction, and the first bead seat of the rim portion 3 The portion 9 extends radially outward from the radial inner peripheral edge 3b. As described above, since the outer end of the spoke portion 4 protrudes outward in the axle direction with respect to the rim portion 3, the rigidity of the spoke portion 4 is improved.

車両用ホイール１が取り付けられた車両は、車両用ホイール１と同軸にディスク部２よりも車軸方向の内方、かつ、第２ビードシート部１０よりも車軸方向の外方に配置されて、側面視で車軸を中心とした円形をなすブレーキディスク１４を備える。ディスク部２の外径は、ブレーキディスク１４の外径に略等しい。このため、ブレーキディスク１４が外部から見え難く、意匠性が向上する。また、ブレーキの摩耗粉の飛散が抑制され、車両用ホイール１の意匠面である、車軸方向の外側の面に摩耗粉が付着することが抑制される。   The vehicle to which the vehicle wheel 1 is attached is disposed coaxially with the vehicle wheel 1 inward in the axle direction from the disc portion 2 and further outward than the second bead seat portion 10 in the axle direction. It has a brake disc 14 that is circular in shape with the axle as the center. The outer diameter of the disk portion 2 is substantially equal to the outer diameter of the brake disk 14. For this reason, the brake disk 14 is hardly seen from the outside, and the design is improved. In addition, the scattering of the wear powder from the brake is suppressed, and the wear powder is prevented from adhering to the outer surface in the axle direction, which is the design surface of the vehicle wheel 1.

以上のように、車両用ホイール１は、肉抜き部１３を設けることにより軽量化されるが、スポーク部４のディスク部２及びリム部３への連結形状や、肉抜き部１３の形状及び配置によって剛性が向上するため、補強のための他の部材を接合しなくても車両用ホイール１に必要な強度を確保できる。   As described above, the vehicle wheel 1 is reduced in weight by providing the lightening portion 13, but the shape of the connection of the spoke portion 4 to the disk portion 2 and the rim portion 3, and the shape and arrangement of the lightening portion 13 The rigidity is thereby improved, so that the strength required for the vehicle wheel 1 can be secured without joining other members for reinforcement.

以上で具体的実施形態の説明を終えるが、本発明は上記実施形態に限定されることなく幅広く変形実施することができる。例えば、スポーク部や締結孔の数は変更してもよく、この場合、複数のスポーク部及び締結孔は車軸を中心とする回転対称形に配置されることが好ましい。   Although the description of the specific embodiments has been completed above, the present invention can be widely modified without being limited to the above embodiments. For example, the number of spokes and fastening holes may be changed, and in this case, it is preferable that the plurality of spokes and fastening holes be arranged in a rotationally symmetric shape about the axle.

１：車両用ホイール
２：ディスク部
３：リム部（３ａ：車軸方向の外縁、３ｂ：内周縁）
４：スポーク部
７：ハブ
１２：接続面
１３：肉抜き部
１４：ブレーキディスク 1: vehicle wheel 2: disk portion 3: rim portion (3a: outer edge in the axle direction, 3b: inner peripheral edge)
4: Spoke part 7: Hub 12: Connection surface 13: Lightening part 14: Brake disk

Claims (5)

車軸を中心とした円盤状をなし、ハブに取り付けられるべきディスク部と、
タイヤが取り付けられるべき円環状をなすリム部と、
前記ディスク部及び前記リム部を互いに結合する複数のスポーク部とを備える車両用ホイールであって、
前記スポーク部の半径方向の内端部が、前記ディスク部に対して車軸方向の外向きに突出形成され、かつ前記ディスク部の外周縁よりも前記半径方向の内方に延出し、
前記車軸方向の内側の面において、凹状の肉抜き部が前記スポーク部及び前記ディスク部に跨がって設けられていることを特徴とする車両用ホイール。 A disk part that has a disk shape centered on the axle and should be attached to the hub,
An annular rim to which the tire should be attached,
A plurality of spokes that couple the disc portion and the rim portion to each other,
A radially inner end of the spoke portion is formed so as to protrude outward in the axle direction with respect to the disk portion, and extends radially inward from an outer peripheral edge of the disk portion,
A vehicle wheel, wherein a concave hollow portion is provided across the spoke portion and the disc portion on the inner surface in the axle direction. 前記スポーク部の前記半径方向の内端部における前記車軸方向の外側の表面は、前記半径方向の内方に向かうにつれて前記車軸方向の内方に向かい、前記ディスク部の前記車軸方向の外側の表面に接続する接続面を有し、
前記肉抜き部の前記半径方向の延在範囲は、前記接続面の前記半径方向の延在範囲の全体を含むことを特徴とする請求項１に記載の車両用ホイール。 The outer surface in the axle direction at the radially inner end of the spoke portion faces inward in the axle direction as it goes inward in the radial direction, and the outer surface in the axle direction of the disk portion. A connection surface for connecting to
The vehicle wheel according to claim 1, wherein the radial extension range of the lightening portion includes the entire radial extension range of the connection surface. 側面視で前記ディスク部及び前記リム部に重なっていない範囲において、前記スポーク部の周方向の幅及び厚さは略一定であり、前記半径方向の外方に向かうにつれて、前記肉抜き部の周方向の幅が広くなり、及び／又は前記肉抜き部の前記車軸方向の深さが深くなることを特徴とする請求項１又は２に記載の車両用ホイール。   In a range that does not overlap the disc portion and the rim portion in a side view, the circumferential width and thickness of the spoke portion are substantially constant. The vehicle wheel according to claim 1, wherein a width in a direction is increased and / or a depth of the lightening portion in the axle direction is increased. 前記スポーク部と前記リム部との連結部分において、前記スポーク部の前記半径方向の外端部は、前記リム部に対して前記リム部の前記車軸方向の外縁よりも前記車軸方向の外方に突出形成され、かつ前記リム部の内周縁よりも前記半径方向の外方に延出していることを特徴とする請求項１〜３の何れか一項に記載の車両用ホイール。   In the connection portion between the spoke portion and the rim portion, the radially outer end portion of the spoke portion is located more outward in the axle direction than the outer edge in the axle direction of the rim portion with respect to the rim portion. The vehicle wheel according to any one of claims 1 to 3, wherein the vehicle wheel is formed so as to protrude and extends outward in the radial direction from an inner peripheral edge of the rim portion. 前記ハブに固定された請求項１〜４の何れか一項に記載の車両用ホイールと、
前記ディスク部よりも前記車軸方向の内方に配置され、側面視で前記車軸を中心として円形をなすブレーキディスクとを備える車両において、
前記ディスク部の外径は、前記ブレーキディスクの外径に略等しいことを特徴とする車両。 The vehicle wheel according to any one of claims 1 to 4, fixed to the hub,
A vehicle that is disposed more inward in the axle direction than the disk portion and has a brake disk that forms a circle around the axle in a side view.
The vehicle according to claim 1, wherein an outer diameter of the disc portion is substantially equal to an outer diameter of the brake disc.
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