JPH084321Y2 - Casting wheels for motorcycles - Google Patents
Casting wheels for motorcyclesInfo
- Publication number
- JPH084321Y2 JPH084321Y2 JP1987159290U JP15929087U JPH084321Y2 JP H084321 Y2 JPH084321 Y2 JP H084321Y2 JP 1987159290 U JP1987159290 U JP 1987159290U JP 15929087 U JP15929087 U JP 15929087U JP H084321 Y2 JPH084321 Y2 JP H084321Y2
- Authority
- JP
- Japan
- Prior art keywords
- hub
- spoke
- axle
- side walls
- peripheral wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、自動二輪車用の鋳造ホイールに関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cast wheel for a motorcycle.
自動二輪車では、リムとハブを複数のスポークで連結
したホイールを軽合金でダイカスト鋳造などによって一
体鋳造したものを用いることがある。その場合、軽量化
のために、中子を用いて内側を中空に形成する。しか
し、ハブは、中心に車軸筒部分を設けて、剛性を高めて
いるので、その外側とスポークの内側の中空部を形成す
る中子の砂は、小さい孔を設けて取出しており、中子砂
抜きに手間がかかって、製造が面倒でコスト高について
いる。例えば、特開昭61−92754号公報参照。In some motorcycles, a wheel in which a rim and a hub are connected by a plurality of spokes is integrally cast from a light alloy by die casting or the like. In that case, in order to reduce the weight, a hollow core is used to form the inside. However, since the hub is provided with the axle cylinder portion in the center to enhance the rigidity, the sand of the core that forms the hollow portion on the outside of the hub and the inside of the spoke is taken out by providing a small hole. It takes time and labor to remove the sand, and the production is troublesome and the cost is high. See, for example, JP-A-61-292754.
なお、中空のハブ内部に強度を高めるために補強部材
を配設することが考えられるが、スポークの根元の周辺
が弱いことを考慮してそこを強化するように補強部材を
配設する技術は、従来提案されていない。Although it is possible to dispose a reinforcing member inside the hollow hub in order to increase the strength, a technique for disposing a reinforcing member to strengthen the spoke is considered to be weak around the base of the spoke. , Not previously proposed.
この考案は、リム、ハブ、スポークを一体鋳造するホ
イルで、ハブの剛性とスポークの根元の剛性とをあわせ
て高め、効率良く剛性を向上させて、肉薄化することが
できるようにし、内側を中空にする中子の砂抜きが容易
にできて、製造時間が短縮でき、コストダウンを図るこ
とができる自動二輪車用の鋳造ホイールを得ることを目
的とする。This device is a foil that casts a rim, a hub, and spokes integrally, and enhances the rigidity of the hub and the rigidity of the root of the spoke together, so that the rigidity can be efficiently improved and the inner wall can be thinned. An object of the present invention is to obtain a casting wheel for a motorcycle, in which the hollow core can be easily sand-removed, the manufacturing time can be shortened, and the cost can be reduced.
本考案は、前記目的を達成するため、外周の環状のリ
ム（１）と、中央に車軸孔（４）を設けた左右の側壁
（2a、2a）と該左右の側壁（2a、2a）間の外周を連結し
た周壁（2b）とからなる太鼓状のハブ（２）とを複数の
スポーク（３）で連結して軽合金で一体鋳造する自動二
輪車用の鋳造ホイールにおいて、前記ハブ（２）の側壁
（2a、2a）および周壁（2b）の内側に形成した中空部
（５）とスポーク（３）の内側に形成した中空部（６）
とを接続口（８）を介してそれぞれ連通させ、さらに、
前記ハブ（２）内側の中空部（５）内で左右の側壁（2
a、2a）間を円弧状のブリッジ部（７）で連結させると
共に、該ブリッジ部（７）は、各スポーク（３）につい
て、車軸孔（４）より外方で周壁（2b）より内方の車軸
径方向位置であって、かつ、少なくとも一部がスポーク
（３）の中空部（６）から車軸径方向に見て前記接続口
（８）と重なった周方向位置にそれぞれ設けたことを特
徴とする自動二輪車用の鋳造ホイールの構成を有する。In order to achieve the above-mentioned object, the present invention provides a space between the left and right side walls (2a, 2a) and the left and right side walls (2a, 2a) provided with an outer peripheral annular rim (1) and an axle hole (4) in the center. A casting wheel for a motorcycle, in which a drum-shaped hub (2) consisting of a peripheral wall (2b) connecting the outer circumferences of the two is connected by a plurality of spokes (3) and integrally cast with a light alloy, the hub (2) (5) formed inside the side walls (2a, 2a) and peripheral wall (2b) and the hollow (6) formed inside the spokes (3)
And are communicated with each other through the connection port (8),
Inside the hollow part (5) inside the hub (2), left and right side walls (2
a, 2a) are connected by an arcuate bridge portion (7), and the bridge portion (7) is, for each spoke (3), outside the axle hole (4) and inside the peripheral wall (2b). Of the spokes (3), and at least a part of the spokes (3) is provided at a circumferential position overlapping the connection port (8) when viewed from the hollow portion (6) of the spoke (3) in the axle radial direction. It has a characteristic construction of a casting wheel for a motorcycle.
本考案においては、ブリッジ部によりハブの車軸方向
両側の左右側壁を連結するためハブの剛性が高い。ま
た、ハブには、スポークの中心線上に負荷がかかるの
で、ハブを少なくとも一部がスポークの中空部から車軸
径方向に見て接続口と重なった周方向位置にそれぞれ設
けることにより、剛性の弱いスポークの根元とハブのス
ポーク取り付け箇所周辺とを中心に剛性を強化できる。In the present invention, since the bridge portion connects the left and right side walls on both sides in the axle direction of the hub, the rigidity of the hub is high. In addition, since the hub is loaded on the center line of the spoke, rigidity is weakened by providing the hub at a circumferential position where at least a part of the hub overlaps with the connection port when viewed in the radial direction of the axle from the hollow portion of the spoke. Rigidity can be strengthened around the root of the spoke and the area around the spoke attachment point of the hub.
以下、本考案を図面に示す実施例によって説明する。 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.
外周の環状のリム１と、中央に車軸孔４を設けた左右
の側壁2a、2aと該左右の側壁2a、2a間の外周を連結した
周壁2bとからなる太鼓状のハブ２とを複数のスポーク３
で連結して、軽合金でダイカスト鋳造等により一体鋳造
して自動二輪車用の鋳造ホイールとする。A plurality of drum-shaped hubs 2 each having an annular rim 1 on the outer periphery, left and right side walls 2a and 2a having an axle hole 4 in the center, and a peripheral wall 2b connecting the outer periphery between the left and right side walls 2a and 2a are provided. Spoke 3
Then, the cast wheels for motorcycles are integrally cast by light casting such as die casting.
前記ハブ２には、中心に車軸を通す車軸孔４を設け、
側壁2a、2aおよび周壁2bで囲まれる内側に中空部５を形
成する。スポーク３の内側にも中空部を形成する。ハブ
５の中空部５とスポーク３の中空部６とを接続口８を介
してそれぞれ連通させる。なお、前記中空部５と中空部
６とはジェルモールドなどの中子で一連に形成し、鋳型
に中子をセットすることによって形成する。The hub 2 is provided with an axle hole 4 through which an axle passes,
The hollow portion 5 is formed inside by being surrounded by the side walls 2a, 2a and the peripheral wall 2b. A hollow portion is also formed inside the spoke 3. The hollow portion 5 of the hub 5 and the hollow portion 6 of the spoke 3 are communicated with each other via the connection port 8. The hollow portion 5 and the hollow portion 6 are formed by forming a core with a core such as a gel mold and setting the core in a mold.
前記ハブ２内側の中空部５内に円弧状のブリッジ部７
を前記中子を貫通させて設け、円弧状のブリッジ部７で
左右の側壁2a、2a間を連結する。An arc-shaped bridge portion 7 is provided in the hollow portion 5 inside the hub 2.
Is provided so as to penetrate the core, and the left and right side walls 2a, 2a are connected by an arcuate bridge portion 7.
また、前記ブリッジ部７は、各スポーク３について、
車軸孔４より外方で周壁2bより内方の車軸径方向位置で
あって、かつ、少なくとも一部がスポーク３の中空部６
から車軸径方向に見て前記接続口８と重なった周方向位
置にそれぞれ設ける。In addition, the bridge portion 7 is, for each spoke 3,
At a position outside the axle hole 4 and inside the peripheral wall 2b in the axle radial direction, and at least a part of which is the hollow portion 6 of the spoke 3.
Are provided at circumferential positions overlapping the connection port 8 when viewed in the radial direction of the axle.
リム１の外周には、タイヤが嵌着され、ハブ２の車軸
孔４には、車軸が貫通され、車軸はベアリングを介し
て、車軸孔４に回転自在に取り付けられる。A tire is fitted around the outer periphery of the rim 1, an axle is passed through the axle hole 4 of the hub 2, and the axle is rotatably attached to the axle hole 4 via a bearing.
以下実施例の作用を説明する。 The operation of the embodiment will be described below.
ハブ２は、両側が複数のブリッジ部７で連結されて、
剛性を高く保てる。特にブリッジ部７は、各スポーク３
について、ハブ２内側の中空部５内において、左右の側
壁2a、2a間を連結しており、車軸孔４より外方で周壁2b
より内方の車軸径方向位置であって、かつ、少なくとも
一部がスポーク３の中空部６から車軸径方向に見て前記
接続口８と重なった周方向位置にそれぞれ設けているの
で、スポーク３の根元3aの中空部６の弱い箇所を中心に
強化するとができる。ブリッジ部７は、複数設けてあっ
て、ブリッジ部７とブリッジ部７の間に隙間があるの
で、鋳造後砂状になった中子を隙間を通して車軸孔４に
落すことができ、中子砂の抜取りが簡単に短時間ででき
て、コストダウンを図るとができる。The hub 2 is connected on both sides with a plurality of bridge portions 7,
High rigidity can be maintained. In particular, the bridge portion 7 is for each spoke 3
In the hollow portion 5 inside the hub 2, the left and right side walls 2a are connected to each other, and the peripheral wall 2b is located outside the axle hole 4.
The spokes 3 are located inward in the radial direction of the axle, and at least a part of the spoke 3 is provided at a circumferential position overlapping the connection port 8 when viewed from the hollow portion 6 of the spoke 3 in the axle radial direction. It can be strengthened around the weak part of the hollow part 6 of the root 3a. Since a plurality of bridge portions 7 are provided and there is a gap between the bridge portions 7 and 7, the sand core after casting can be dropped into the axle hole 4 through the gap. Can be easily removed in a short time, and the cost can be reduced.
以上説明したように、この考案によれば、ハブの両側
がブリッジ部で連結されて剛性を高めることができる。
特にブリッジ部が、ハブ内側の中空部内において、左右
の側壁間を連結しており、各スポークについて、車軸孔
より外方で周壁より内方の車軸径方向位置であって、か
つ、少なくとも一部がスポークの中空部から車軸径方向
に見て前記接続口と重なった周方向位置にそれぞれ設け
ているので、剛性の弱いスポークの根元の剛性を高める
ことができる。そして、複数のブリッジ部の間には間隔
があって、中子砂を簡単に車軸孔に抜くことができ、中
子砂の抜取り時間を短縮できてコストダウンを図ること
ができる。又、ハブには、中子砂を抜くための小孔を設
ける必要がなく、強度上有利にできる。As described above, according to the present invention, both sides of the hub are connected by the bridge portion, so that the rigidity can be increased.
In particular, the bridge portion connects the left and right side walls in the hollow portion inside the hub, and for each spoke, it is at a position outside the axle hole and inside the peripheral wall in the axle radial direction, and at least partly. Are provided at circumferential positions overlapping with the connection ports when viewed in the radial direction of the axle from the hollow portions of the spokes, so that the rigidity of the base of the spokes having low rigidity can be increased. Further, since there is a space between the plurality of bridge portions, the core sand can be easily extracted into the axle hole, and the time for extracting the core sand can be shortened and the cost can be reduced. Further, it is not necessary to provide the hub with a small hole for removing the core sand, which is advantageous in strength.
図は本考案の一実施例を示し、第１図は一部を破断面に
した正面図、第２図は拡大部分縦断面図である。 １……リム、２……ハブ、３……スポーク、４……車軸
孔、５……中空部、６……中空部、７……ブリッジ部。FIG. 1 shows an embodiment of the present invention, FIG. 1 is a front view with a partially broken section, and FIG. 2 is an enlarged partial vertical sectional view. 1 ... rim, 2 ... hub, 3 ... spoke, 4 ... axle hole, 5 ... hollow part, 6 ... hollow part, 7 ... bridge part.
Claims (1)
（４）を設けた左右の側壁（2a、2a）と該左右の側壁
（2a、2a）間の外周を連結した周壁（2b）とからなる太
鼓状のハブ（２）とを複数のスポーク（３）で連結して
軽合金で一体鋳造する自動二輪車用鋳造ホイールにおい
て、 前記ハブ（２）の側壁（2a、2a）および周壁（2b）の内
側に形成した中空部（５）とスポーク（３）の内側に形
成した中空部（６）とを接続口（８）を介してそれぞれ
連通させ、 さらに、前記ハブ（２）内側の中空部（５）内で左右の
側壁（2a、2a）間を円弧状のブリッジ部（７）で連結さ
せると共に、 該ブリッジ部（７）は、各スポーク（３）について、車
軸孔（４）より外方で周壁（2b）より内方の車軸径方向
位置であって、かつ、少なくとも一部がスポーク（３）
の中空部（６）から車軸径方向に見て前記接続口（８）
と重なった周方向位置にそれぞれ設けたことを特徴とす
る自動二輪車用鋳造ホイール。1. A peripheral wall which connects an outer periphery between an outer peripheral annular rim (1), left and right side walls (2a, 2a) having an axle hole (4) in the center, and the left and right side walls (2a, 2a). A casting wheel for a motorcycle, wherein a drum-shaped hub (2) composed of (2b) and a drum-shaped hub (2) are connected by a plurality of spokes (3) and integrally cast with a light alloy, the sidewalls (2a, 2a) of the hub (2). And the hollow part (5) formed inside the peripheral wall (2b) and the hollow part (6) formed inside the spoke (3) are communicated with each other through a connection port (8), and the hub (2) ) Inside the hollow part (5), the left and right side walls (2a, 2a) are connected by an arcuate bridge part (7), and the bridge part (7) is provided with an axle hole for each spoke (3). (4) Axial radial position outside of the peripheral wall (2b) outside of (4) and at least part of the spoke (3 )
The connection port (8) when viewed from the hollow part (6) in the radial direction of the axle.
A casting wheel for a motorcycle, which is provided at a circumferential position overlapping with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987159290U JPH084321Y2 (en) | 1987-10-20 | 1987-10-20 | Casting wheels for motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987159290U JPH084321Y2 (en) | 1987-10-20 | 1987-10-20 | Casting wheels for motorcycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0163501U JPH0163501U (en) | 1989-04-24 |
| JPH084321Y2 true JPH084321Y2 (en) | 1996-02-07 |
Family
ID=31440373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987159290U Expired - Lifetime JPH084321Y2 (en) | 1987-10-20 | 1987-10-20 | Casting wheels for motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084321Y2 (en) |
-
1987
- 1987-10-20 JP JP1987159290U patent/JPH084321Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0163501U (en) | 1989-04-24 |
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