JP2012172683A - Propeller shaft, and yoke structure of cardin joint - Google Patents

Propeller shaft, and yoke structure of cardin joint Download PDF

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Publication number
JP2012172683A
JP2012172683A JP2011031690A JP2011031690A JP2012172683A JP 2012172683 A JP2012172683 A JP 2012172683A JP 2011031690 A JP2011031690 A JP 2011031690A JP 2011031690 A JP2011031690 A JP 2011031690A JP 2012172683 A JP2012172683 A JP 2012172683A
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Prior art keywords
shaft
yoke
groove
tip
propeller shaft
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JP2011031690A
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Inventor
Kenichiro Ishikura
健一郎 石倉
Keigo Yoshida
啓悟 吉田
Hiromichi Komai
浩倫 駒井
Hidekazu Aoki
英和 青木
Shinichi Kondo
伸一 近藤
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Ltd
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Priority to JP2011031690A priority Critical patent/JP2012172683A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
    • F16D3/387—Fork construction; Mounting of fork on shaft; Adapting shaft for mounting of fork
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/12—Mounting or assembling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
    • F16D3/41—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes with ball or roller bearings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a propeller shaft in which the outer diameter of a yoke can be reduced as much as possible while securing excellent assembling performance of a cross shaft to the yoke, and a weight reduction is achieved.SOLUTION: In the propeller shaft including an input side yoke 6 axially fixed at the one end of an input shaft and formed with the tip in a two-forked state, a spider shaft provided on a pair of fitting insertion holes 13c and 13c formed on two-forked tips 13b and 13b of the yoke, and guide grooves 14 and 14 along the axial direction are formed on opposite inner surfaces 13d and 13d of both the tips. This guide groove is formed such that the groove depth d is gradually deepened from the fitting insertion hole side to the tip edge side of the tip, and the groove width w is formed larger than the outer diameter of the shaft part of the spider shaft.

Description

本発明は、例えば自動車用のプロペラシャフト及びカルダンジョイントのヨーク構造に関する。   The present invention relates to a propeller shaft for an automobile and a yoke structure of a cardan joint, for example.

この種の従来のプロペラシャフトとしては、以下の特許文献１に記載されているようなものが知られている。   As this type of conventional propeller shaft, one described in Patent Document 1 below is known.

概略を説明すれば、このプロペラシャフトは、軸方向に配設された一対の軸部と、該各軸部の対向端部に設けられたカルダンジョイントとを備えている。このカルダンジョイントは、各基端部が前記各軸部の端部に溶接などによって固定された対向する一対のヨークと、該各ヨークの先端部にそれぞれ形成された各貫通孔に挿通配置された十字軸と、該十字軸を前記貫通孔に回転自在に支持する軸受部と、を備えている。   In brief, the propeller shaft includes a pair of shaft portions disposed in the axial direction, and a cardan joint provided at the opposite end of each shaft portion. The cardan joint is inserted and arranged in a pair of opposing yokes whose base end portions are fixed to the end portions of the shaft portions by welding or the like, and through holes formed in the tip portions of the yokes, respectively. A cross shaft, and a bearing portion that rotatably supports the cross shaft in the through hole.

また、前記各ヨークの二股部の対向する内面に案内溝が形成されており、この案内溝は、溝深さが前記各貫通孔側から二股部側に向かって浅くなるようにテーパ状に形成されている。   Further, guide grooves are formed on the inner surfaces of the forked portions of each yoke facing each other, and the guide grooves are formed in a tapered shape so that the groove depth becomes shallower from the through holes to the forked portions. Has been.

そして、前記カルダンジョイントの十字軸をヨークに組み付ける場合は、該十字軸の全体を適宜傾斜させて、その一端部を、前記案内溝を通過させながら一方の貫通孔内に挿入し、次いで、前記一端部を貫通孔の内部へ嵌挿させながら、他端部を引き起こして該他端部を他方の貫通孔の内部に嵌挿させる。これによって、十字軸をヨークに容易に取り付けることができる。   When the cross shaft of the cardan joint is assembled to the yoke, the entire cross shaft is appropriately inclined, and one end thereof is inserted into one through hole while passing through the guide groove. While the one end portion is fitted into the through hole, the other end portion is raised and the other end portion is fitted into the other through hole. Thus, the cross shaft can be easily attached to the yoke.

実公昭４４−１１２２８号公報Japanese Utility Model Publication No. 44-11228

しかし、この従来のプロペラシャフトにあっては、前記案内溝によって十字軸の容易な取り付けが可能になるものの、前記案内溝は、その溝深さが貫通孔側から二股部の先端側に沿って漸次浅くなるように形成されており、換言すれば、貫通孔側が深く、ヨーク先端部側が浅くなっている。このため、溝部のないヨークに比べてヨーク全体の剛性が小さくなってしまう。つまり、溝部は、貫通孔側で大きく切り欠かれていることからベアリングキャップを含めた十字軸の支持剛性が低下してしまう。   However, in this conventional propeller shaft, although the cross groove can be easily attached by the guide groove, the groove depth of the guide groove extends from the through hole side to the tip of the bifurcated portion. In other words, the through hole side is deeper and the yoke tip end side is shallower. For this reason, the rigidity of the whole yoke will become small compared with the yoke without a groove part. That is, since the groove portion is greatly cut out on the through hole side, the support rigidity of the cross shaft including the bearing cap is lowered.

そこで、前記案内溝のないヨークと同程度の剛性を持たせるためには、二股部の肉厚を大きくする必要がある。この結果、ヨークの外径が大きくなってしまうと共に、重量の増加が余儀なくされる。   Therefore, in order to have the same degree of rigidity as the yoke without the guide groove, it is necessary to increase the thickness of the bifurcated portion. As a result, the outer diameter of the yoke is increased and the weight is inevitably increased.

本発明は、前記従来のプロペラシャフトの技術的課題に鑑みて案出されたもので、ヨークに対する十字軸の良好な組付性を確保しつつヨークの外径を可及的に小さくできると共に、軽量化が図れるプロペラシャフトを提供するものである。   The present invention has been devised in view of the technical problem of the conventional propeller shaft, and it is possible to make the outer diameter of the yoke as small as possible while ensuring good assembly of the cross shaft to the yoke. A propeller shaft that can be reduced in weight is provided.

請求項１に記載の発明は、軸部の端部にヨークや十字軸などからなるカルダンジョイントを備えたプロペラシャフトであって、ヨークの二股部の対向する内面の少なくともいずれか一方に軸方向へ沿った溝部を形成すると共に、該溝部は、その溝深さが前記貫通孔側から前記二股部の先端側に向かって漸次深くなるように形成されていると共に、溝巾が前記十字軸の外径よりも大きく形成されていることを特徴としている。   The invention according to claim 1 is a propeller shaft provided with a cardan joint made of a yoke, a cross shaft or the like at the end of the shaft portion, and is axially provided on at least one of the opposing inner surfaces of the bifurcated portion of the yoke. The groove portion is formed so that the groove depth gradually becomes deeper from the through hole side toward the tip end side of the bifurcated portion, and the groove width is outside the cross shaft. It is characterized by being formed larger than the diameter.

請求項２に記載の発明は、カルダンジョイントのヨーク構造であって、前記ヨークは、先端部に形成された二股部の対向する内面の少なくともいずれか一方に軸方向に沿った溝部が形成され、該溝部は、その溝深さが前記貫通孔側から前記二股部の先端側に向かって漸次深くなるように形成されていると共に、溝巾が前記十字軸の外径よりも大きく形成されていることを特徴としている。   The invention according to claim 2 is a yoke structure of a cardan joint, wherein the yoke is formed with a groove portion along the axial direction on at least one of the opposed inner surfaces of the bifurcated portion formed at the tip portion. The groove portion is formed so that the groove depth gradually becomes deeper from the through hole side toward the tip end side of the bifurcated portion, and the groove width is formed larger than the outer diameter of the cross shaft. It is characterized by that.

本発明によれば、ヨークに対して十字軸を組み付ける際に、前記溝部を利用して組み付けることができるので、この組付作業が容易になる。   According to the present invention, when the cross shaft is assembled to the yoke, it can be assembled using the groove portion, and this assembling work is facilitated.

特に、前記溝部は、その溝深さが貫通孔側から二股部の先端側に向かって漸次深くなるように形成されていることから、貫通孔の周囲の剛性の低下を抑制することができるため、貫通孔に嵌挿される十字軸の支持剛性を高く維持できる。これによって、ヨークの外径を大きくする必要がなくなると共に、軽量化が図れる。   In particular, since the groove depth is formed so that the groove depth gradually becomes deeper from the through hole side toward the tip end side of the bifurcated portion, it is possible to suppress a decrease in rigidity around the through hole. The support rigidity of the cross shaft inserted into the through hole can be maintained high. Accordingly, it is not necessary to increase the outer diameter of the yoke, and the weight can be reduced.

本発明に係るプロペラシャフトの一実施形態を一部断面して示す側面図である。1 is a side view showing a partially sectioned embodiment of a propeller shaft according to the present invention. 本発明に係るカルダンジョイントの一実施形態を示す分解斜視図である。It is a disassembled perspective view which shows one Embodiment of the cardan joint which concerns on this invention. 本実施形態に供される入力側ヨークを示し、Ａは入力側ヨークの縦断面図、Ｂは横断面図である。The input side yoke provided to this embodiment is shown, A is a longitudinal sectional view of the input side yoke, and B is a transverse sectional view. 本実施形態に供される入力側ヨークを溶湯鍛造した直後の状態を示し、Ａは入力側ヨークの縦断面図、Ｂは横断面図であるThe state immediately after melt-forging the input side yoke provided for this embodiment is shown, A is a longitudinal cross-sectional view of an input side yoke, B is a cross-sectional view. Ａは本実施形態における入力側ヨークに十字軸を組み付ける状態を示す模式図、Ｂはガイド溝のない従来技術における入力側ヨークに十字軸を組み付ける状態を示す模式図である。A is a schematic diagram showing a state in which the cross shaft is assembled to the input side yoke in the present embodiment, and B is a schematic diagram showing a state in which the cross shaft is assembled to the input side yoke in the related art having no guide groove.

以下、本発明に係るプロペラシャフト及びカルダンジョイントのヨーク構造の実施形態を図面に基づいて説明する。この実施形態では、自動車用のプロペラシャフトと該プロペラシャフトに用いられる自在継手であるカルダンジョイントのヨークに適用したものである。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a yoke structure of a propeller shaft and a cardan joint according to the present invention will be described based on the drawings. In this embodiment, the present invention is applied to a propeller shaft for an automobile and a cardan joint yoke which is a universal joint used for the propeller shaft.

前記プロペラシャフト１は、図１に示すように、いわゆる２ジョイントタイプであって、アルミニウム合金材によって一体に形成された長尺円筒状の軸部である入力軸２と、該入力軸２の一端部に設けられて、図外のトランスミッション側に接続される第１カルダンジョイント３と、入力軸２の他端部に設けられて、図外のデファレンシャル側の出力軸に接続される第２カルダンジョイント４とから主として構成されている。   As shown in FIG. 1, the propeller shaft 1 is a so-called two-joint type, and includes an input shaft 2 that is a long cylindrical shaft portion integrally formed of an aluminum alloy material, and one end of the input shaft 2. The first cardan joint 3 provided in the part and connected to the transmission side outside the figure, and the second cardan joint provided in the other end part of the input shaft 2 and connected to the output side on the differential side outside the figure 4 is mainly composed.

前記第１カルダンジョイント３は、図２に示すように、前記入力軸２の一端部２ａとトランスミッション側の円筒状のすべり継手５とを接続するものであって、前記入力軸２の一端部２ａに取り付けられる端末部材である入力側ヨーク６と、前記すべり継手５に一体に有するスリーブヨーク７と、前記入力側ヨーク６とスリーブヨーク７とを連結する十字軸であるスパイダー軸８と、から主として構成されている。   As shown in FIG. 2, the first cardan joint 3 connects one end 2 a of the input shaft 2 and a cylindrical sliding joint 5 on the transmission side, and includes one end 2 a of the input shaft 2. An input side yoke 6 that is a terminal member attached to the sliding joint 5, a sleeve yoke 7 that is integrated with the sliding joint 5, and a spider shaft 8 that is a cross shaft that connects the input side yoke 6 and the sleeve yoke 7. It is configured.

前記第２カルダンジョイント４は、デファレンシャルギアに取り付けられるフランジヨーク９と、入力軸２の他端部２ｂに取り付けられる出力側ヨーク１０と、前記フランジヨーク９と出力側ヨーク１０とを連結する十字軸であるスパイダー軸１１と、から主として構成されている。   The second cardan joint 4 includes a flange yoke 9 attached to a differential gear, an output side yoke 10 attached to the other end 2b of the input shaft 2, and a cross shaft for connecting the flange yoke 9 and the output side yoke 10 together. It is mainly comprised from the spider shaft 11 which is.

第１カルダンジョイント３と第２カルダンジョイント４は、前記入力側ヨーク６と出力側ヨーク１１などの基本構造が同一であるから、以下、図２などに基づいて第１カルダンジョイント３について具体的に説明して、第２カルダンジョイント４については同一符号を付して具体的な説明は省略する。   Since the first cardan joint 3 and the second cardan joint 4 have the same basic structure such as the input side yoke 6 and the output side yoke 11, the first cardan joint 3 will be specifically described below with reference to FIG. In the description, the second cardan joint 4 is denoted by the same reference numeral, and a detailed description thereof is omitted.

前記入力側ヨーク６は、アルミニウム合金材をベースとしたいわゆる溶湯鍛造によって一体に形成され、図３Ａ、Ｂにも示すように、前記入力軸２側に有する円筒状の基部１２と、該基部１２の先端側に一体に有する二股部である一対のフォーク部１３、１３とから構成されている。   The input side yoke 6 is integrally formed by so-called molten metal forging based on an aluminum alloy material. As shown in FIGS. 3A and 3B, the input side yoke 6 has a cylindrical base portion 12 on the input shaft 2 side, and the base portion 12. It is comprised from a pair of fork parts 13 and 13 which are the forked part which has integrally on the front end side.

前記基部１２は、各フォーク部１３、１３と反対側の後端部が前記入力軸２の一端部２ａに軸方向から摩擦溶接によって接合されている。   The base 12 has a rear end opposite to the forks 13, 13 joined to one end 2 a of the input shaft 2 by friction welding from the axial direction.

前記二股状の各フォーク部１３、１３は、図３Ａ、Ｂに示すように、基部１２側の基端部１３ａ、１３ａから軸方向に延びる先端部１３ｂ、１３ｂが先細り状のほぼＵ字形状に形成され、軸方向のほぼ中央位置に、前記各スパイダー軸８が嵌挿される貫通孔である嵌挿孔１３ｃ、１３ｃがそれぞれ径方向へ貫通形成されている。また、前記フォーク部１３は、溶湯鍛造による成形直後の状態を示す図４Ａ，Ｂにも示すように、対向する内面１３ｄ、１３ｄに所定巾の溝部である一対のガイド溝１４，１４が形成されている。   As shown in FIGS. 3A and 3B, the bifurcated fork portions 13 and 13 are formed in a substantially U shape in which tip portions 13b and 13b extending in the axial direction from the base end portions 13a and 13a on the base portion 12 side are tapered. The insertion holes 13c and 13c, which are formed and are through holes into which the spider shafts 8 are inserted, are formed in a substantially central position in the axial direction. In addition, as shown in FIGS. 4A and 4B showing the state immediately after forming by the forging of the molten metal, the fork portion 13 is formed with a pair of guide grooves 14 and 14 which are grooves of a predetermined width on the inner surfaces 13d and 13d facing each other. ing.

この各ガイド溝１４、１４は、図４Ａ、Ｂに明確に示すように、後に孔開け加工によって形成される前記嵌挿孔１３ｃ、１３ｃの形成位置から先端部１３ｂ、１３ｂの先端縁まで延びた長方形状に形成され、その溝深さｄが前記嵌挿孔１３ｃ、１３ｃ側から先端部側１３ｂ、１３ｂの先端縁まで漸次深くなるようにテーパ状に形成されていると共に、溝巾ｗが前記スパイダー軸８の各軸部８ｂの外径よりも僅かに大きく形成されている。   As clearly shown in FIGS. 4A and B, the guide grooves 14 and 14 extend from the formation positions of the fitting insertion holes 13c and 13c, which are formed later by drilling, to the tip edges of the tip portions 13b and 13b. It is formed in a rectangular shape, and the groove depth d is tapered so that it gradually becomes deeper from the fitting insertion holes 13c, 13c side to the distal end edges of the distal end side portions 13b, 13b, and the groove width w is The spider shaft 8 is formed slightly larger than the outer diameter of each shaft portion 8b.

また、図３及び図４に示すように、前記各ガイド溝１４、１４を構成する両側壁の先端角部には、所定曲率半径の第１アール部１５ａ、１５ａが形成されていると共に、前記先端部１３ｂ、１３ｂの各ガイド溝１４の開口端となる先端角部には、所定曲率半径の第２アール部１５ｂ、１５ｂがそれぞれ形成されている。   Also, as shown in FIGS. 3 and 4, first corners 15a, 15a having a predetermined radius of curvature are formed at the tip corners of both side walls constituting the guide grooves 14, 14, and Second rounded portions 15b and 15b having a predetermined radius of curvature are formed at the corners of the tips, which are the open ends of the guide grooves 14 of the tips 13b and 13b.

前記スパイダー軸８は、図１及び図２に示すように、一般的な構造であって中央部８ａから十字方向に延びる４つの軸部８ｂ、８ｃから構成され、各軸部８ｂ８ｃには、それぞれ円筒状のベアリングキャップ１６が嵌着されている。このベアリングキャップ１６のスパイダー軸８側の位置には、嵌着溝８ｄが形成され、該嵌着溝８ｄに前記ベアリングキャップ１６の軸方向の移動を規制するスナップリング１７が嵌着固定されるようになっている。また、各ベアリングキャップ１６の前端と前記スパイダー軸８との間に、それぞれシールリング１８が介装されている。   As shown in FIGS. 1 and 2, the spider shaft 8 has a general structure and is composed of four shaft portions 8b and 8c extending in the cross direction from the central portion 8a. Each shaft portion 8b8c includes A cylindrical bearing cap 16 is fitted. A fitting groove 8d is formed at a position of the bearing cap 16 on the spider shaft 8 side, and a snap ring 17 for restricting the axial movement of the bearing cap 16 is fitted and fixed to the fitting groove 8d. It has become. Further, a seal ring 18 is interposed between the front end of each bearing cap 16 and the spider shaft 8.

また、前記各フォーク部１３，１３の対向内面１３ｄ、１３ｄの前記嵌挿孔１３ｃ、１３ｃの孔縁は、該嵌挿孔１３ｃ、１３ｃの軸方向に対してほぼ垂直な平坦状に形成されている。これによって、スナップリング１７と前記対向内面１３ｄとの接触面積を十分に確保することができる。   Further, the hole edges of the fitting insertion holes 13c and 13c of the opposing inner surfaces 13d and 13d of the fork portions 13 and 13 are formed in a flat shape substantially perpendicular to the axial direction of the fitting insertion holes 13c and 13c. Yes. Thereby, a sufficient contact area between the snap ring 17 and the opposed inner surface 13d can be secured.

そして、本実施形態において、前記入力側ヨーク３などにスパイダー軸８を組み付ける際には、図５Ａに示すように、まず、スパイダー軸８全体を適宜傾倒させながら一方の軸部８ｂの一端を入力側ヨーク３の内側から一方の嵌挿孔１３ｃに挿通し、続いて、そのままスパイダー軸８を持ち上げながら反対側の他方の軸部８ｃの一端を前記ガイド溝１４に沿って他方の嵌挿孔１３ｃ方向へ移動させ、そのまま他方の嵌挿孔１３ｃ内に挿通させる。   In this embodiment, when the spider shaft 8 is assembled to the input side yoke 3 or the like, as shown in FIG. 5A, first, one end of one shaft portion 8b is input while appropriately tilting the entire spider shaft 8. The other insertion portion 13c is inserted into the other insertion portion 13c along the guide groove 14 while the spider shaft 8 is lifted as it is and the other end portion of the other shaft portion 8c is inserted into the other insertion portion 13c from the inside of the side yoke 3. It is made to move in the direction and is inserted as it is into the other fitting insertion hole 13c.

このように、スパイダー軸８の他方の軸部８ｃをガイド溝１４に沿って他方の嵌挿孔１３ｃまで移動させることができるので、かかる組付作業性が向上すると共に、剛性を確保しつつ入力側ヨーク３の外径を可及的に小さくすることが可能になる。   In this way, the other shaft portion 8c of the spider shaft 8 can be moved along the guide groove 14 to the other fitting insertion hole 13c, so that the assembling workability is improved and input is performed while ensuring rigidity. It becomes possible to make the outer diameter of the side yoke 3 as small as possible.

すなわち、図５Ｂに示す前記ガイド溝１４が形成されていないものと、図５Ａに示す本実施形態のものを比較して説明すると、ガイド溝１４が形成されていないものは、前記同じ長さのスパイダー軸８’を嵌挿孔１３ｃ’に組み付ける場合には、一方の軸部８ｂ’を一方の嵌挿孔１３ｃ’に挿通した後に、反対側の他方の軸部８ｃ’を他方の嵌挿孔１３ｃ’に嵌挿するには、その軸部８ｃ’の突出長さ分だけ両フォーク部１３，１３間の長さＬ１を、前記本実施形態の長さＬよりも長く設定しなければならない。したがって、必然的にガイド溝１４が形成されていない入力側ヨーク６’の外径Ｄｏは、実施形態の入力側ヨーク３の外径Ｄよりも大きく形成しなければならない。   That is, when the guide groove 14 shown in FIG. 5B is not formed and this embodiment shown in FIG. 5A is compared, the guide groove 14 having no guide groove 14 has the same length. When assembling the spider shaft 8 ′ into the insertion hole 13c ′, after inserting one shaft portion 8b ′ into the one insertion hole 13c ′, the other shaft portion 8c ′ on the opposite side is inserted into the other insertion hole. In order to fit into 13c ', the length L1 between the fork parts 13 and 13 must be set longer than the length L of the present embodiment by the length of projection of the shaft 8c'. Accordingly, the outer diameter Do of the input side yoke 6 ′ in which the guide groove 14 is not necessarily formed must be formed larger than the outer diameter D of the input side yoke 3 of the embodiment.

換言すれば、本実施形態の場合は、前記ガイド溝１４を形成したことによって、両フォーク部１３、１３の間の長さＬが、ガイド溝を有さないものＬ１よりも短くすることができ、この結果、入力側ヨーク３の外径もＤ＜Ｄｏとなる。   In other words, in the case of the present embodiment, by forming the guide groove 14, the length L between the fork portions 13 and 13 can be made shorter than the length L1 that does not have the guide groove. As a result, the outer diameter of the input side yoke 3 is also D <Do.

この結果、プロペラシャフト１の回転半径を小さくすることができるため、プロペラシャフト１の車両への組付性も向上する。   As a result, since the rotation radius of the propeller shaft 1 can be reduced, the assembling property of the propeller shaft 1 to the vehicle is also improved.

特に、本実施形態では、前記各ガイド溝１４の溝深さｄをフォーク部１３の嵌挿孔１３ｃ側から先端部１３ｂまで漸次深くなるように形成したため、前記嵌挿孔１３ｃの周囲の剛性の低下を抑制することが可能になる。このため、該嵌挿孔１３ｃやベアリングキャップ１６によるスパイダー軸８の各軸部８ｂ、８ｃの高い支持剛性を確保することができる。   In particular, in the present embodiment, the groove depth d of each guide groove 14 is formed so as to gradually become deeper from the fitting insertion hole 13c side of the fork portion 13 to the tip end portion 13b, so that the rigidity around the fitting insertion hole 13c is increased. It is possible to suppress the decrease. For this reason, the high support rigidity of each axial part 8b of the spider shaft 8 by this fitting insertion hole 13c and the bearing cap 16 is securable.

したがって、前記特許文献１に記載した従来技術のような案内溝を有するものであっても、フォーク部の剛性を確保するために肉厚に形成しなければならないといった技術的課題を有しない。   Therefore, even if it has a guide groove like the prior art described in the said patent document 1, in order to ensure the rigidity of a fork part, it does not have the technical subject that it must form in thickness.

また、本実施形態では、前記フォーク部１３のガイド溝１４の角部と先端側に第１，第２アール部１５ａ、１５ｂを形成したため、ガイド溝１４やその付近の入口巾が広くなることから前記軸部８ｂ、８ｃを各嵌挿孔１３ｃ、１３ｃに嵌挿させる際の角部への干渉を回避することが可能になり、この組付作業が容易になる。また、たとえ、干渉したとしても大きな損傷の発生を抑制できる。この結果、カルダンジョイント３の耐久性を向上させることが可能になる。   In the present embodiment, since the first and second rounded portions 15a and 15b are formed at the corners and the front end side of the guide groove 14 of the fork portion 13, the guide groove 14 and the vicinity of the inlet are widened. It is possible to avoid interference with corner portions when the shaft portions 8b and 8c are inserted into the respective insertion holes 13c and 13c, and this assembling work is facilitated. Moreover, even if it interferes, generation | occurrence | production of a big damage can be suppressed. As a result, the durability of the cardan joint 3 can be improved.

さらに、前記入力側ヨーク６などの各ヨークを溶湯鍛造によって形成したことによって、該鍛造時に前記ガイド溝１４や各アール部１５ａ、１５ｂも同時に形成することができるので、後工程で加工する必要がない。よって、成形コストの低減化が図れる。また、前記ガイド溝１４は、前述のように、先端部１３ｂ方向へ漸次深くなるように形成されていることから、前記溶湯鍛造後の離型作業、つまり抜き性が良好になり、該離型作業も容易になる。   Furthermore, since each yoke such as the input side yoke 6 is formed by melt forging, the guide groove 14 and the rounded portions 15a and 15b can be formed at the same time during the forging. Absent. Therefore, the molding cost can be reduced. Further, as described above, the guide groove 14 is formed so as to gradually become deeper in the direction of the tip end portion 13b. Therefore, the mold release operation after the forging of the molten metal, that is, the drawability is improved. Work becomes easy.

さらに、前記入力側ヨーク６及び出力側ヨーク９をアルミニウム合金材によって形成したため、プロペラシャフト１全体の軽量化が図れる。この結果、プロペラシャフト１の固有振動数が上昇することによって車体に伝達される振動を抑制できる。   Furthermore, since the input side yoke 6 and the output side yoke 9 are formed of an aluminum alloy material, the weight of the propeller shaft 1 as a whole can be reduced. As a result, the vibration transmitted to the vehicle body can be suppressed by increasing the natural frequency of the propeller shaft 1.

本発明は、前記実施形態の構成に限定されるものではなく、前記ガイド溝１４は、２つのフォーク部１３，１３のいずれか一方のみに形成することも可能であり、このようにすれば、ガイド溝１４を有しない一方側のヨークの剛性をさらに高めることが可能になる。   The present invention is not limited to the configuration of the above embodiment, and the guide groove 14 can be formed only in one of the two fork portions 13 and 13, and in this way, It is possible to further increase the rigidity of the yoke on one side that does not have the guide groove 14.

また、前記ガイド溝１４は、溶湯鍛造による形成に限らず、加工によって形成することも可能である。   Further, the guide groove 14 is not limited to being formed by melt forging, but can be formed by processing.

さらに、前記入力側ヨーク６や出力側ヨーク９を、アルミニウム合金材以外の例えば、鉄などの他の金属材料を使用することも可能である。   Further, the input side yoke 6 and the output side yoke 9 can be made of other metal materials such as iron other than the aluminum alloy material.

また、例えば、前記スナップリング１７を用いずに、嵌挿孔１３ｃ内でベアリングキャップ１６をかしめることによって固定することも可能である。   Further, for example, without using the snap ring 17, the bearing cap 16 can be fixed by caulking in the fitting insertion hole 13c.

また、本発明は、プロペラシャフト１の入力軸２に接合するヨークばかりか、フランジ部あるいは摺動部を備えたヨークにも適用することが可能である。   Further, the present invention can be applied not only to a yoke joined to the input shaft 2 of the propeller shaft 1 but also to a yoke having a flange portion or a sliding portion.

前記実施形態から把握される前記請求項以外の発明の技術的思想について以下に説明する。
〔請求項ａ〕前記溝部が形成された前記二股部の一方の先端側に形成された角部にアール部を形成したことを特徴とする請求項３に記載のプロペラシャフトまたはカルダンジョイントのヨーク構造。 The technical ideas of the invention other than the claims ascertained from the embodiment will be described below.
[Claim a] The propeller shaft or the cardan joint yoke structure according to claim 3, wherein a rounded portion is formed at a corner portion formed on one tip side of the bifurcated portion where the groove portion is formed. .

１…プロペラシャフト
２…入力軸（軸部）
３・４…第１、第２カルダンジョイント
５…すべり軸受
６…入力側ヨーク
７…スリーブヨーク
８・１１…スパイダー軸（十字軸）
８ｂ・８ｃ…軸部
９…フランジヨーク
１０…出力側ヨーク
１２…ヨーク基部
１３…フォーク部
１３ａ…基端部
１３ｂ…先端部
１４…ガイド溝（溝部）
１５ａ…第１アール部
１５ｂ…第２アール部 1 ... Propeller shaft 2 ... Input shaft (shaft)
3 · 4 ··· First and second cardan joints 5 ··· Slide bearing 6 ··· Input side yoke 7 · · · Sleeve yoke 8 · 11 · · · Spider shaft (cross shaft)
8b · 8c ··· Shaft portion 9 ··· Flange yoke 10 ··· Output side yoke 12 ··· Yoke base portion 13 ··· Fork portion 13a ··· Base end portion 13b · · · Tip portion 14 ··· Guide groove
15a ... 1st radius part 15b ... 2nd radius part

Claims (3)

軸部と、該軸部の軸方向端部に固定され、先端部が二股状に形成されたヨークと、該ヨークの二股部に形成された一対の貫通孔に設けられた十字軸と、を備え、前記十字軸は、前記各貫通孔に挿通された状態で両側から軸受が嵌合されるプロペラシャフトであって、
前記二股部の対向する内面の少なくともいずれか一方に軸方向へ沿った溝部を形成すると共に、該溝部は、その溝深さが前記貫通孔側から前記二股部の先端側に向かって漸次深くなるように形成されていると共に、溝巾が前記十字軸の外径よりも大きく形成されていることを特徴とするプロペラシャフト。 A shaft portion, a yoke fixed to an axial end portion of the shaft portion and having a tip portion formed in a bifurcated shape, and a cross shaft provided in a pair of through holes formed in the bifurcated portion of the yoke, The cross shaft is a propeller shaft to which a bearing is fitted from both sides in a state of being inserted into each through hole,
A groove portion extending in the axial direction is formed on at least one of the opposing inner surfaces of the bifurcated portion, and the groove depth gradually increases from the through hole side toward the distal end side of the bifurcated portion. A propeller shaft characterized in that the groove width is formed larger than the outer diameter of the cross shaft. 軸部の端部に設けられたカルダンジョイントのヨーク構造であって、
前記ヨークは、先端部に形成された二股部の対向する内面の少なくともいずれか一方に軸方向に沿った溝部が形成され、該溝部は、その溝深さが前記貫通孔側から前記二股部の先端側に向かって漸次深くなるように形成されていると共に、溝巾が前記十字軸の外径よりも大きく形成されていることを特徴とするカルダンジョイントのヨーク構造。 A cardan joint yoke structure provided at the end of the shaft,
The yoke is formed with a groove along the axial direction on at least one of the opposing inner surfaces of the bifurcated portion formed at the tip, and the groove has a groove depth from the through-hole side to the bifurcated portion. A cardan joint yoke structure, wherein the yoke structure is formed so as to be gradually deeper toward the tip side, and the groove width is formed to be larger than the outer diameter of the cross shaft. 前記溝部の先端側に形成された角部に、アール部を形成したことを特徴とする請求項１または２に記載のプロペラシャフトまたはカルダンジョイントのヨーク構造。   3. The propeller shaft or cardan joint yoke structure according to claim 1, wherein a rounded portion is formed at a corner portion formed on a front end side of the groove portion. 4.
JP2011031690A 2011-02-17 2011-02-17 Propeller shaft, and yoke structure of cardin joint Pending JP2012172683A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016003729A (en) * 2014-06-18 2016-01-12 日本精工株式会社 Yoke for cross shaft joint, and cross shaft joint
JP2016008654A (en) * 2014-06-24 2016-01-18 日本精工株式会社 Joint cross type universal joint

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5061237U (en) * 1973-10-11 1975-06-05
JP2006275086A (en) * 2005-03-28 2006-10-12 Hikari Seiko Co Ltd Universal joint

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5061237U (en) * 1973-10-11 1975-06-05
JP2006275086A (en) * 2005-03-28 2006-10-12 Hikari Seiko Co Ltd Universal joint

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016003729A (en) * 2014-06-18 2016-01-12 日本精工株式会社 Yoke for cross shaft joint, and cross shaft joint
JP2016008654A (en) * 2014-06-24 2016-01-18 日本精工株式会社 Joint cross type universal joint

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