JP2016068689A - wheel - Google Patents

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JP2016068689A
JP2016068689A JP2014198636A JP2014198636A JP2016068689A JP 2016068689 A JP2016068689 A JP 2016068689A JP 2014198636 A JP2014198636 A JP 2014198636A JP 2014198636 A JP2014198636 A JP 2014198636A JP 2016068689 A JP2016068689 A JP 2016068689A
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boss
wheel
axial direction
viewed
tooth
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JP5997744B2 (en
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龍一 永井
Ryuichi Nagai
龍一 永井
真二 伊藤
Shinji Ito
真二 伊藤
鈴木　都志充
Toshimitsu Suzuki
都志充 鈴木
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Honda Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a wheel inexpensive and capable of suppressing occurrence of noise.SOLUTION: A wheel comprises a hub part made of a light alloy, and a boss 20 made of a metal of higher strength than the light alloy and provided at the axial center of the hub part by casting for insertion of an axle, in which rotational force is transmitted between the axle and the hub part via the boss 20. The boss 20 comprises a large teeth portion 22 that is formed, as a power transmission part between the boss and the hub part, in a radial wave shape as viewed in the axial direction and has a high tooth height h2, and a small teeth portion 21 that is formed, on a nearer side to the axis than the large teeth portion 22, in a radial wave shape as viewed in the axial direction and has a tooth height h1 lower than that of the large teeth portion 22.SELECTED DRAWING: Figure 2

Description

本発明は、ホイールに関するものである。   The present invention relates to a wheel.

従来、例えば特許文献１に見られるように、軽合金製ハブ部（１４ｂ）と、軽合金より高強度の金属製でかつ前記ハブ部（１４ｂ）の軸心に鋳込みにより設けられ、車軸（１３）が挿通されるボス（１８）とを備え、回転力が車軸（１３）とハブ部（１４ｂ）との間でボス（１８）を介して伝達されるホイールが知られている。   Conventionally, as seen in Patent Document 1, for example, a light alloy hub portion (14b) and a metal made of a metal having a higher strength than a light alloy and provided at the shaft center of the hub portion (14b) by casting are provided. ) Through which the rotational force is transmitted between the axle (13) and the hub (14b) via the boss (18) is known.

このような構造のホイールにあっては、製造時に軽合金製ハブ部（１４ｂ）とボス（１８）との境界に微細な隙間が生じることがある。そのため、比較的大きなエンジン駆動力等の回転力が作用する際、該回転力がある大きさになるまではボス（１８）とハブ部（１４ｂ）とは静止摩擦力により回転力に耐えているものの、該回転力がある大きさを越えると、ボス（１８）とハブ部（１４ｂ）とが回転力に耐えられなくなって動摩擦の状態となり、その際、静止摩擦の状態で蓄えられたエネルギが一気に放出され、ボス（１８）とハブ部（１４ｂ）とが一気に相対移動する際に音が発生することがあった。   In the wheel having such a structure, a fine gap may be generated at the boundary between the light alloy hub (14b) and the boss (18) during manufacture. Therefore, when a rotational force such as a relatively large engine driving force is applied, the boss (18) and the hub portion (14b) withstand the rotational force by a static friction force until the rotational force reaches a certain level. However, when the rotational force exceeds a certain magnitude, the boss (18) and the hub portion (14b) become unable to withstand the rotational force and become a state of dynamic friction. At this time, the energy stored in the state of static friction is reduced. There was a case where sound was generated when the boss (18) and the hub portion (14b) moved relative to each other at a stroke.

このような音の発生を防止するため、特許文献１記載の従来技術では、ボス（１８）とハブ部（１４ｂ）との間に、鋳込みによるボス（１８）とハブ部（１４ｂ）との間の静止摩擦係数を低減させる摩擦係数低減層（１９）を介在させた構造としていた。   In order to prevent the generation of such sound, in the prior art described in Patent Document 1, between the boss (18) and the hub portion (14b), between the cast boss (18) and the hub portion (14b). The friction coefficient reducing layer (19) for reducing the static friction coefficient is interposed.

このような従来の構造によれば、エンジン駆動力やエンジンブレーキによる回転力が比較的小さいうちにボス（１８）とハブ部（１４ｂ）との間で滑りが生じるため、静止摩擦の状態で大きなエネルギが蓄えられるということがなくなり、結果として、音の発生を防止又は軽減できる。   According to such a conventional structure, since slip occurs between the boss (18) and the hub portion (14b) while the rotational force by the engine driving force or engine brake is relatively small, it is large in the state of static friction. Energy is not stored, and as a result, generation of sound can be prevented or reduced.

特開２００７−１１２３８７号公報JP 2007-112387 A

上述した特許文献１記載の従来技術では、ボス（１８）とハブ部（１４ｂ）との間に、摩擦係数低減層（１９）を介在させるため、耐熱性にも優れた表面処理材料が必要になる。また、ボス（１８）には酸化皮膜（黒皮）が形成されなくなるため、電位差による腐食にも対応した表面処理材料を選定する必要がある。
そのため、表面処理コストが高価になり、結果としてホイールのコストが上昇する。
本発明が解決しようとする課題は、廉価かつ音の発生を抑制することができるホイールを提供することである。 In the prior art described in Patent Document 1 described above, since the friction coefficient reducing layer (19) is interposed between the boss (18) and the hub portion (14b), a surface treatment material excellent in heat resistance is required. Become. Further, since an oxide film (black skin) is not formed on the boss (18), it is necessary to select a surface treatment material that can cope with corrosion due to a potential difference.
Therefore, the surface treatment cost becomes expensive, and as a result, the cost of the wheel increases.
The problem to be solved by the present invention is to provide a wheel that is inexpensive and can suppress the generation of sound.

上記課題を解決するために本発明のホイールは、
軽合金製ハブ部と、
軽合金より高強度の金属製でかつ前記ハブ部の軸心に鋳込みにより設けられ、車軸が挿通されるボスと、
を備えるホイールであって、
前記ボスは、
軸線方向から見て波形で放射状に形成され、歯の高さ（Ｈ２）が大きな大歯部と、
歯の高さ（ｈ１）が前記大歯部（２２）よりも小さな小歯部（２１）と、
を備え、
前記大歯部及び前記小歯部は周方向に複数設けられていることを特徴とする。
本願発明者が上記音の発生理由について考察した結果、次のことが分かった。
（１）鋳造時に、ボスとハブ部との間において、隙間が生じる。
（２）使用により隙間が拡大し、ボスとハブ部とが相対移動し得るスペースが形成される。
（３）ボスとハブ部とが相対移動し得るスペースが形成されてしまうと、前述したように、静止摩擦の状態で蓄えられたエネルギが一気に放出され、ボスとハブ部とが相対移動を開始する際に音が発生する。
これに対し、本発明のホイールによれば、ボスが、ハブ部との間の動力伝達部として、軸線方向から見て波形で放射状に形成され、歯の高さが高い大歯部と、この大歯部よりも中心側において、軸線方向から見て波形で放射状に形成され、歯の高さが前記大歯部よりも小さな小歯部とを備えているので、ボスとハブ部との間で伝達される動力（負荷）は、大歯部と小歯部とに分散される。
分散されることにより大歯部に作用する負荷が軽減されることから、使用によってもボスとハブ部とが相対移動し得るスペースが形成されにくくなる。
結果として、音の発生が抑制されることとなる。
また、この発明によれば、ボスの形状を変えれば足りるから、従来技術による摩擦係数低減層の形成に比べれば、特殊な表面処理が不要であるため廉価である。 In order to solve the above problems, the wheel of the present invention is
A light alloy hub,
A boss which is made of a metal having a strength higher than that of a light alloy and is provided by casting in the shaft center of the hub portion, and the axle is inserted;
A wheel comprising:
The boss
A large tooth portion that is radially formed with a waveform when viewed from the axial direction and has a large tooth height (H2);
A small tooth portion (21) having a tooth height (h1) smaller than the large tooth portion (22);
With
A plurality of large teeth and small teeth are provided in the circumferential direction.
As a result of studying the reason for the generation of the sound, the inventors of the present application have found the following.
(1) During casting, a gap is generated between the boss and the hub portion.
(2) The gap is enlarged by use, and a space in which the boss and the hub portion can move relative to each other is formed.
(3) When a space where the boss and the hub portion can move relative to each other is formed, as described above, the energy stored in the state of static friction is released at once, and the boss and the hub portion start relative movement. Sound is generated when
On the other hand, according to the wheel of the present invention, the boss is formed as a power transmission portion between the hub portion and a radial shape with a waveform when viewed from the axial direction, and the large tooth portion having a high tooth height, In the center side of the large tooth part, it is radially formed in a waveform when viewed from the axial direction, and has a small tooth part whose tooth height is smaller than that of the large tooth part. The power (load) transmitted at is distributed to the large tooth portion and the small tooth portion.
Since the load acting on the large tooth portion is reduced by being dispersed, it is difficult to form a space in which the boss and the hub portion can move relative to each other even when used.
As a result, the generation of sound is suppressed.
Further, according to the present invention, since it is sufficient to change the shape of the boss, it is inexpensive because a special surface treatment is unnecessary as compared with the formation of the friction coefficient reducing layer according to the prior art.

このホイールにおいては、
軸線方向から見て、相隣接する大歯部同士の間において相隣接する小歯部同士の間に形成される凹部形状は、相隣接する大歯部同士の間に形成される凹部と軸方向視で一致している構成とすることができる。
このように構成すると、成形性を高めることができる。 In this wheel,
When viewed from the axial direction, the shape of the recess formed between the adjacent small tooth portions between the adjacent large tooth portions is the same as the recess formed between the adjacent large tooth portions and the axial direction. It can be set as the structure which corresponds visually.
If comprised in this way, a moldability can be improved.

このホイールにおいては、
軸線方向から見て、一つの大歯部内に二つの小歯部が配置されている構成とすることができる。
このように構成すると、成形性を高めることができるとともに、小歯部の歯の高さも確保できる。 In this wheel,
It can be set as the structure by which two small tooth parts are arrange | positioned in one large tooth part seeing from an axial direction.
If comprised in this way, while being able to improve a moldability, the height of the tooth | gear of a small tooth part is securable.

本発明に係るホイールの一実施の形態を示す図で、（ａ）は側面図、（ｂ）は図（ａ）におけるｂ−ｂ断面図。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the wheel which concerns on this invention, (a) is a side view, (b) is bb sectional drawing in Fig. (A). 同実施の形態におけるボスを示す図で、（ａ）は側面図、（ｂ）は図（ａ）におけるｂ−ｂ断面図、（ｃ）は図（ａ）の部分拡大図。It is a figure which shows the boss | hub in the embodiment, (a) is a side view, (b) is bb sectional drawing in Fig. (A), (c) is the elements on larger scale of Fig. (A). この実施の形態のホイールが取り付けられる一例としてのパワーユニットの平断面図。The plane sectional view of the power unit as an example to which the wheel of this embodiment is attached.

以下、本発明に係るホイールの実施の形態について図面を参照して説明する。なお、各図において、同一部分ないし相当する部分には、同一の符号を付してある。   Embodiments of a wheel according to the present invention will be described below with reference to the drawings. In each figure, the same reference numerals are given to the same or corresponding parts.

図１に示すように、この実施の形態のホイール１０は、軽合金製ハブ部１１と、軽合金より高強度の金属製でかつハブ部１１の軸心に鋳込みにより設けられ、車軸３１（図３参照）が挿通されるボス２０とを備え、回転力が車軸３１とハブ部１１との間でボス２０を介して伝達されるホイールである。   As shown in FIG. 1, the wheel 10 of this embodiment includes a light alloy hub portion 11 and a metal made of a metal having a strength higher than that of the light alloy and is cast into the shaft center of the hub portion 11. 3) and a boss 20 through which the rotational force is transmitted between the axle 31 and the hub portion 11 via the boss 20.

図２（ａ）（ｃ）に示すように、ボス２０は、ハブ部１１との間の動力伝達部として、
軸線方向から見て波形で放射状に形成され、歯の高さｈ２が大きな大歯部２２と、
この大歯部２２よりも軸心側において、軸線方向から見て波形で放射状に形成され、歯の高さｈ１が大歯部２２よりも小さな小歯部２１とを備えている。 As shown in FIGS. 2A and 2C, the boss 20 is a power transmission part between the hub part 11 and the boss 20.
A large tooth portion 22 that is radially formed with a waveform when viewed from the axial direction and has a large tooth height h2,
On the axial center side with respect to the large tooth portion 22, there is provided a small tooth portion 21 that is radially formed in a waveform when viewed from the axial direction and has a tooth height h 1 smaller than that of the large tooth portion 22.

このホイール１０により得られる作用効果について説明する。
まず、軽合金製ハブ部と、軽合金より高強度の金属製でかつ前記ハブ部の軸心に鋳込みにより設けられ、車軸が挿通されるボスとを備え、回転力が車軸とハブ部との間でボスを介して伝達されるホイールにおいて音が発生する理由について説明する。 The effects obtained by the wheel 10 will be described.
First, a light alloy hub portion and a boss that is made of a metal having a strength higher than that of the light alloy and is cast into the shaft center of the hub portion and through which the axle is inserted, the rotational force between the axle and the hub portion. The reason why sound is generated in the wheel transmitted through the boss between the two will be described.

本願発明者が上記音の発生理由について考察した結果、次のことが分かった。
（１）鋳造時に、ボスとハブ部との間において、隙間が生じる。
（２）使用により隙間が拡大し、ボスとハブ部とが相対移動し得るスペースが形成される。
（３）ボスとハブ部とが相対移動し得るスペースが形成されてしまうと、前述したように、静止摩擦の状態で蓄えられたエネルギが一気に放出され、ボスとハブ部とが相対移動を開始する際に音が発生する。 As a result of studying the reason for the generation of the sound, the inventors of the present application have found the following.
(1) During casting, a gap is generated between the boss and the hub portion.
(2) The gap is enlarged by use, and a space in which the boss and the hub portion can move relative to each other is formed.
(3) When a space where the boss and the hub portion can move relative to each other is formed, as described above, the energy stored in the state of static friction is released at once, and the boss and the hub portion start relative movement. Sound is generated when

これに対し、この実施の形態のホイール１０によれば、図２に示すように、ボス２０が、ハブ部１１との間の動力伝達部として、軸線方向から見て波形で放射状に形成され、歯の高さｈ２が高い大歯部２２と、この大歯部２２よりも軸心側において、軸線方向から見て波形で放射状に形成され、歯の高さｈ１が大歯部２２よりも小さな小歯部２１とを備えているので、ボス２０とハブ部１１との間で伝達される動力（負荷）は、大歯部２２と小歯部２１とに分散される。   On the other hand, according to the wheel 10 of this embodiment, as shown in FIG. 2, the bosses 20 are radially formed in a waveform as viewed from the axial direction as a power transmission portion between the hub portion 11 and A large tooth portion 22 having a high tooth height h2 and a radial shape in a waveform when viewed from the axial direction on the axial center side with respect to the large tooth portion 22, and a tooth height h1 smaller than that of the large tooth portion 22. Since the small tooth portion 21 is provided, the power (load) transmitted between the boss 20 and the hub portion 11 is distributed to the large tooth portion 22 and the small tooth portion 21.

分散されることにより大歯部２２に作用する負荷が軽減されることから、使用によってもボス２０とハブ部１１とが相対移動し得るスペースが形成されにくくなる。
結果として、音の発生が抑制されることとなる。
また、このホイール１０によれば、ボス２０の形状を従来の形状から変えれば足りるから、特許文献１による摩擦係数低減層の形成に比べれば、特殊な表面処理が不要であるため廉価である。 Since the load acting on the large tooth portion 22 is reduced by being dispersed, it is difficult to form a space in which the boss 20 and the hub portion 11 can move relative to each other even when used.
As a result, the generation of sound is suppressed.
Further, according to the wheel 10, it is sufficient to change the shape of the boss 20 from the conventional shape. Therefore, compared with the formation of the friction coefficient reducing layer according to Patent Document 1, a special surface treatment is not required and the cost is low.

図２（ａ）に示すように、軸線方向から見て、相隣接する大歯部２２同士の間において相隣接する小歯部２１同士の間に形成される凹部形状２１ｃは、相隣接する大歯部２２同士の間に形成される凹部２２ｃにおける中心側形状（２１ｃ）と一致している。つまり、相隣接する大歯部２２同士の間において相隣接する小歯部２１同士を結ぶ曲線は、相隣接する大歯部２２同士を結ぶ曲線と重なっている。
このように構成すると、成形性を高めることができる。 As shown in FIG. 2A, when viewed from the axial direction, the concave shape 21c formed between the adjacent small tooth portions 21 between the adjacent large tooth portions 22 is adjacent to each other. This coincides with the central shape (21c) in the recess 22c formed between the tooth portions 22. That is, the curve connecting the adjacent small tooth portions 21 between the adjacent large tooth portions 22 overlaps the curve connecting the adjacent large tooth portions 22.
If comprised in this way, a moldability can be improved.

図２（ａ）（ｃ）に示すように、軸線方向から見て、一つの大歯部２２内に二つの小歯部２１が配置されている。
このように構成すると、成形性を高めることができるとともに、小歯部２１の歯の高さｈ１も確保できる。 As shown in FIGS. 2A and 2C, two small tooth portions 21 are arranged in one large tooth portion 22 when viewed from the axial direction.
If comprised in this way, while being able to improve a moldability, the height h1 of the tooth | gear of the small tooth part 21 is also securable.

この実施の形態では、ホイール１０はハブ部１１を含めアルミニューム合金の一体成形品であり、ボス２０は鉄製である。
ホイール１０は、例えば図３に示すように、パワーユニット３０の出力軸（車軸）３１に取り付けられる。
出力軸３１とホイール１０のボス２０とはスプライン結合される。図２において、２３がスプラインである。 In this embodiment, the wheel 10 is an integrally formed product of aluminum alloy including the hub portion 11, and the boss 20 is made of iron.
The wheel 10 is attached to the output shaft (axle) 31 of the power unit 30, for example, as shown in FIG.
The output shaft 31 and the boss 20 of the wheel 10 are splined. In FIG. 2, 23 is a spline.

以上、本発明の実施の形態について説明したが、本発明は上記の実施の形態に限定されるものではなく、本発明の要旨の範囲内において適宜変形実施可能である。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified within the scope of the gist of the present invention.

１０：ホイール、１１：ハブ部、２０：ボス、２１：小歯部、２２：大歯部、２１ｃ、２２ｃ：凹部形状、３１：車軸。   10: Wheel, 11: Hub part, 20: Boss, 21: Small tooth part, 22: Large tooth part, 21c, 22c: Concave shape, 31: Axle.

Claims (3)

軽合金製ハブ部（１１）と、
軽合金より高強度の金属製でかつ前記ハブ部（１１）の軸心に鋳込みにより設けられ、車軸（３１）が挿通されるボス（２０）と、
を備えるホイールであって、
前記ボス（２０）は、
軸線方向から見て波形で放射状に形成され、歯の高さ（ｈ２）が大きな大歯部（２２）と、
歯の高さ（ｈ１）が前記大歯部（２２）よりも小さな小歯部（２１）と、
を備え、
前記大歯部（２２）及び前記小歯部（２１）は周方向に複数設けられていることを特徴とするホイール。 A light alloy hub (11);
A boss (20) which is made of a metal having a strength higher than that of a light alloy and which is provided by casting in the shaft center of the hub portion (11) and through which the axle (31) is inserted;
A wheel comprising:
The boss (20)
A large tooth portion (22) which is radially formed in a waveform when viewed from the axial direction and has a large tooth height (h2);
A small tooth portion (21) having a tooth height (h1) smaller than the large tooth portion (22);
With
A wheel characterized in that a plurality of the large teeth (22) and the small teeth (21) are provided in the circumferential direction. 請求項１において、
軸線方向から見て、相隣接する大歯部（２２）同士の間において相隣接する小歯部（２１）同士の間に形成される凹部形状（２１ｃ）は、相隣接する大歯部（２２）同士の間に形成される凹部（２２ｃ）と軸方向視で一致していることを特徴とするホイール。 In claim 1,
When viewed from the axial direction, the concave shape (21c) formed between the adjacent small teeth (21) between the adjacent large teeth (22) is adjacent to the adjacent large teeth (22). ) A wheel characterized in that it coincides with the recess (22c) formed between them in the axial direction. 請求項１または２において、
軸線方向から見て、一つの大歯部（２２）内に二つの小歯部（２１）が配置されていることを特徴とするホイール。 In claim 1 or 2,
A wheel characterized in that two small teeth (21) are arranged in one large tooth (22) when viewed from the axial direction.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5675201A (en) * 1979-11-22 1981-06-22 Nankai Tekko Kk Plastic wheel for vehicle
JPS58113501U (en) * 1982-01-29 1983-08-03 大同工業株式会社 Hub for light alloy wheels
JPH0416003U (en) * 1990-05-31 1992-02-10
JPH06183201A (en) * 1992-12-18 1994-07-05 Yamaha Motor Co Ltd Die-cast wheel for motorcycle
JPH0930201A (en) * 1995-07-18 1997-02-04 Honda Motor Co Ltd Cast wheel
JPH09118106A (en) * 1995-10-24 1997-05-06 Honda Motor Co Ltd Cast wheel and its manufacture
JP2007112387A (en) * 2005-10-24 2007-05-10 Yamaha Motor Co Ltd Wheel, and motorcycle having the wheel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5675201A (en) * 1979-11-22 1981-06-22 Nankai Tekko Kk Plastic wheel for vehicle
JPS58113501U (en) * 1982-01-29 1983-08-03 大同工業株式会社 Hub for light alloy wheels
JPH0416003U (en) * 1990-05-31 1992-02-10
JPH06183201A (en) * 1992-12-18 1994-07-05 Yamaha Motor Co Ltd Die-cast wheel for motorcycle
JPH0930201A (en) * 1995-07-18 1997-02-04 Honda Motor Co Ltd Cast wheel
JPH09118106A (en) * 1995-10-24 1997-05-06 Honda Motor Co Ltd Cast wheel and its manufacture
JP2007112387A (en) * 2005-10-24 2007-05-10 Yamaha Motor Co Ltd Wheel, and motorcycle having the wheel

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