JP2004360786A - Connecting structure of shaft and yoke - Google Patents

Connecting structure of shaft and yoke Download PDF

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Publication number
JP2004360786A
JP2004360786A JP2003159631A JP2003159631A JP2004360786A JP 2004360786 A JP2004360786 A JP 2004360786A JP 2003159631 A JP2003159631 A JP 2003159631A JP 2003159631 A JP2003159631 A JP 2003159631A JP 2004360786 A JP2004360786 A JP 2004360786A
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Prior art keywords
shaft
yoke
shaped groove
axis
joint
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Japanese (ja)
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Noriyuki Kamata
紀之 鎌田
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Priority to JP2003159631A priority Critical patent/JP2004360786A/en
Publication of JP2004360786A publication Critical patent/JP2004360786A/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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0847—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to a radial screw
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent the formation of a clearance in the circumferential direction on axes of the rotation of a shaft and a yoke by simple work and to accurately perform the center alignment in the connecting work of the joint yoke of an universal joint as a part of a steering device of an automobile, and the shaft. <P>SOLUTION: One end in the axial direction X1 of the joint yoke 6 of the universal joint is provided with an approximately U-shaped groove 10 extended in the axial direction X1. Inner side faces opposite to each other of side walls 7, 8 of the U-shape groove 10 are planes which are not parallel so that they are slightly opened toward an opening side. Both side faces of one end of the shaft 3 are also planes which are not parallel having the similar crossed axes angle same, and its average width B is slightly larger than an average separating distance H of the side wall parts 7, 8. The connecting work is performed by pressing the shaft 3 to the U-shaped groove 10 in parallel and fastening its center by a bolt 13. The U-shaped groove 10 is firmly fixed in a state of holding the shaft 3 by taper effect, whereby the formation of the clearance in the circumferential direction of the rotation on the axis is surely prevented, and the center alignment can be accurately performed with the specific fastening torque. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、制約の多い作業環境のもと、例えば自動車のステアリング機構の操舵回転を伝達するシャフトと、自在継ぎ手のヨークとの連結作業に関し、特に、簡易な作業で正確に自在継手のヨークおよびシャフトを連結できる構造を提案するものである。
【０００２】
【従来の技術】
自動車のステアリングコラムとステアリングギアボックスとを連結する中間シャフトの連結構造の組み立てに際しては、操舵時のガタツキや異音などの発生を防止するため、一方のシャフトの回転軸線を他方の継手ヨークの回転軸線に完全一致させる心合わせ作業を誤差なく行うとともに、シャフトと継手ヨークの隙間、特に、上記回転軸線を中心とした回転周方向の隙間が生じることなく連結しなければならないが、当該連結作業は、運転席足元付近の奥まった狭く暗い空間で行わねばならず、不自然な作業姿勢を強いられるなど作業効率上の問題があった。このため、作業効率を改善するとともに連結作業の精度向上を目指すことを目的としては、従来、例えば特許文献１乃至３に記載のごときものが知られている。
【０００３】
【特許文献１】
特開平１１−３０２４１号公報
【特許文献２】
特開平１０−１６９６６４号公報
【特許文献３】
特開平１１−２７０５７０号公報
【０００４】
特許文献１に記載のヨークとシャフトの連結構造は、薄いプレス鋼板製のタブのばね力を利用して、ヨークのＵ字溝に嵌合したシャフトに押圧力を与えることにより、心合わせ作業を正確かつ効率的に行えるようしたものである。
また特許文献２および３に記載のヨークとシャフトの連結構造は、ヨークのＵ字溝の開口側に薄いプレス鋼板製のカム部材を掛け渡し、Ｕ字溝に嵌合したシャフトに押圧力を与えることにより、心合わせ作業を正確かつ効率的に行えるようしたものである。
【０００５】
【発明が解決しようとする課題】
しかし、上記従来のようなヨークとシャフトの連結構造にあっては、以下に説明するような問題を生ずる。つまりシャフトとヨークの隙間を小さくすることはできるが、完全に回転周方向の隙間をなくすことができたかどうか確認することができない。その結果、組み付け作業や部品精度のばらつき等により、回転周方向の隙間が生じている可能性がある。また、薄いプレス鋼板製であるため、組み付け作業後の長期間の部品劣化により、心合わせがずれてしまったり、上記隙間が発生する懸念があった。さらに、タブ部材やカム部材といった小さな部品をボルト孔にはめ込む作業が必要であり、部品点数が増加したり、作業効率が複雑になるなど製作コスト上好ましいことではない。
【０００６】
本発明は、より簡易な組み付け作業をもって、より確実に心合わせを行い、かつ回転方向の隙間をなくし、あわせて長期間にわたって耐久性のあるヨークとシャフトの連結構造を提案するものである。
【０００７】
【課題を解決するための手段】
この目的のため本発明によるヨークとシャフトの連結構造は、請求項１に記載のごとく、
動作時に回転するシャフトと、
該シャフトの一端を挿入する略逆Ｕ字形断面の結合部を有するヨークとを具え、
前記ヨークの結合部に前記シャフトの一端を挿入し、これらを締結することにより前記ヨークと前記シャフトとを連結する連結構造において、
前記ヨークの結合部の断面を、前記略逆Ｕ字形の開口部から頂部にかけて先細となる形状とすると共に、
前記シャフトの一端の断面を、前記ヨークの結合部への挿入方向に向かって先細となる形状とし、
前記ヨークと前記シャフトとの連結に際し、前記ヨークの回転軸線と前記シャフトの回転軸線とが一致するように前記シャフトを前記ヨークの結合部に挿入し、その後両者を締結するよう構成したことを特徴としたものである。
【０００８】
【発明の効果】
かかる本発明の構成によれば、シャフトをヨークのＵ字形の結合部に押し込む際に、シャフトの両側面がＵ字形の両側壁から圧力を受け、隙間なく連結することができる。また、工場ではエアーラチェットレンチなどを用いて一定トルクで緊締するところ、締結器具を用いてシャフトをＵ字形の両側壁の間に押し込むため、一定トルクで緊締することで上記押し込み量を管理することが可能であり、簡易な作業をもって、正確に心合わせを行うことができる。さらに、ボルトを使用して緊締することでシャフトをＵ字形の両側壁の間に圧入するため、シャフトがＵ字形の両側壁から圧力を受けてしっかり嵌合しており、長期間経過後であっても、隙間や回転軸線がずれることがなく、異音やガタツキが発生することがない当該連結構造の信頼性を高めることができる。
【０００９】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づき詳細に説明する。
図１は本発明の一実施の形態になるシャフトとヨークの連結構造を一部に用いたステアリング操舵機構を示す側面図である。
図示せざるステアリングホイールと連結し、軸方向に回転する第１シャフト１の一端は、自在継手４を介して第２シャフト２の一端と連結し、第２シャフト２の他端は、自在継手５を介して第３シャフト３の一端と連結し、第３シャフト３の他端は図示せざる転舵輪に連節する。このため、運転者が図示せざるステアリングホイールを回転させると、シャフト１，２，３が回転し、図示せざる転舵輪が転舵する。自在継手４および５は一組の継手ヨークの一端同士を連結してなり、それぞれ継手ヨークの他端はシャフト１，２または３に連結される。
【００１０】
本発明に係るシャフトとヨークの連結構造は、自在継手４および５のいずれにおいても用いてよいことは勿論であるが、特に、シャシ側部材である第３シャフト３と、運転席側部材である継手ヨーク６を連結する作業は、組み立て作業の最終工程において運転席足元付近の奥まった狭く暗い空間で行わねばならず、また、不自然な作業姿勢を強いられるといった本発明の解決しようとする課題を含む。
【００１１】
図２は自在継手５付近を拡大して示し、図中（ａ）は本実施の形態になるシャフトとヨークの連結構造に用いる継手ヨーク６の側面図であり、（ｂ）はシャフト３の一端の側面図である。また、図２のＡ−Ａ線上で断面とし、矢の方向に見て示す横断面図を図３に示し、図中（ｂ）はヨーク６の横断面図、（ｃ）はシャフト３の横断面図、（ａ）はシャフト３をヨーク６に圧入・緊締するためボルト１３の側面図である。
【００１２】
運転席側部材である継手ヨーク６は、操舵時には軸線Ｘ１を中心に回転する。継手ヨーク６は、軸線Ｘ１に関する一端で、相互に向かい合った側壁７，８を具える。側壁７，８の対向する端部同士を軸線Ｘ１方向に延在する底壁９で一体に連結することで軸線Ｘ１方向に延在するＵ字溝１０を形成する。
他方、継手ヨーク６の軸線Ｘ１に関する他端には、自在継手５の一部をなす一対の軸受舌片１４，１４を対向するよう設ける。軸受舌片１４，１４には図示せざる継手部材を挿通するための孔１４ｂ，１４ｂを対向するようそれぞれ穿設し、孔１４ｂ，１４ｂの中心を軸線Ｘ１に一致させる。軸受舌片１４，１４は対向する継手ヨーク２６と連結して自在継手５を構成する。
【００１３】
Ｕ字溝１０の側壁７，８の内側面は相互に対向する平面とし、僅かに不平行であって、側壁７，８の内側面同士の離隔距離はＵ字溝１０開放側へ向かって増大する。Ｕ字溝１０は対称軸Ｙに関して左右対称であり、底壁９中央には対称軸Ｙ方向にボルト孔９ｂを穿設し、かつ孔９ｂ内周には雌ねじを刻設する。また、ボルト孔９ｂは軸線Ｘ１と直交する。そして、底壁９中央の外周９ｆを対称軸Ｙに直角な平面に成形し、ボルト孔９ｂに挿通するボルト１３の頭部との接触を良くする。
【００１４】
シャシ側部材であるシャフト３は操舵時には軸線Ｘ１を中心に回転する。
シャフト３の平坦に成形した側面１１，１２は僅かに不平行であって、該交差角は、側壁７，８の内側面の交差角と一致する。また、シャフト３の対称軸Ｙに対して直角方向の軸線Ｘ２を通る幅Ｂは、側壁７，８の内側面の軸線Ｘ１における離隔距離Ｈよりも僅かに大きい。シャフト３には、対称軸Ｙに一致するようにボルト孔３ｂを穿設し、かつ孔３ｂ内周には雌ねじを刻設する。また、ボルト孔３ｂはシャフトの軸線Ｘ２と直交する。
【００１５】
運転席側部材の継手ヨーク６とシャシ側部材のシャフト３の連結作業は、Ｕ字溝１０にシャフト３の一端を嵌合させ、相互の軸線Ｘ１，Ｘ２を一致するように心合わせを行う。まず、図２および図３に示すようにボルト孔９ｂとボルト孔３ｂを一致させた状態で、太矢印方向にシャフト３をＵ字溝１０に押し込むと、図４および図５に示すようになる。次に底壁９ｆ側からボルト１３をボルト孔９ｂおよびボルト孔３ｂに挿通すると、双方の軸線Ｘ１およびＸ２が平行して距離ｄだけ近接する。最後にボルト１３を所定の締め付けトルクをもって締結することにより、シャフト３はＵ字溝１０の奥へ押し込まれ、シャフト３の軸線Ｘ１が継手ヨーク６の軸線Ｘ２に一致すると連結作業は完了する。継手ヨーク６の軸線Ｘ１とシャフト３の軸線Ｘ２の距離をｄとして、ｄとボルト１３の締め付けトルクＴの関係をグラフに示すと図６のようになる。締め付けトルクＴを一定値Ｔ１からＴ２の間で管理することにより、相互の軸線Ｘ１，Ｘ２を一致させる。
【００１６】
本実施の形態によれば、Ｕ字溝１０の側壁７，８の内側面は相互に対向する僅かに不平行な平面であり、シャフト３の断面の軸線Ｘ２における幅Ｂは側壁７，８の内側面の軸線Ｘ１における離隔距離Ｈよりもわずかに大きく、Ｕ字溝１０にシャフト３の一端を嵌合する際には、ボルト１３を挿通・締結するため、テーパ効果により、Ｕ字溝１０の側壁７，８がシャフト３を挟接した状態でしっかりと連結する。このため、シャフトとヨークの回転周方向の隙間を確実になくすことができ、操舵時のガタツキや異音を防止することができる。
【００１７】
また、継手ヨーク６のボルト孔９ｂおよびシャフト３のボルト孔３ｂにボルト１３が係合するため、まず継手ヨーク６の軸線Ｘ１とシャフト３の軸線Ｘ２を平行位置に合わせることができ、次に所定の締め付けトルクＴ１からＴ２までのある値をもってＵ字溝１０にシャフト３を圧入するため、ヨーク６の軸線Ｘ１とシャフト３の軸線Ｘ２の心合わせを容易に行うことができる。
【００１８】
また、ボルト孔３ｂに雌ねじを刻設したため、ボルト１３を締結するのみで簡単に心合わせをすることができ、ナットなどの部品が不要になって部品点数の削減や、作業効率の向上を達成することができる。
なお、テーパ角により、圧入効果を得るために、側壁７，８の内側面の交差角はおよそ５度が望ましい。
【図面の簡単な説明】
【図１】本発明の一実施の形態になるシャフトとヨークの連結構造を一部に用いたステアリング操舵機構を示す側面図である。
【図２】同実施の形態になるシャフトとヨークの連結構造の連結手順を示す分解図であり、
（ａ）は継手ヨークの側面図、
（ｂ）はシャフトの側面図である。
【図３】同実施の形態になるシャフトとヨークの連結構造を図２のＡ−Ａ線上で断面とし、矢の方向に見て示す分解図であり、
（ａ）は締結用ボルトの側面図、
（ｂ）は継手ヨークの横断面図、
（ｃ）はシャフトの横断面図である。
【図４】同実施の形態になるシャフトとヨークの連結構造の連結作業において、ボルト孔同士を一致させた状態を示す側面図である。
【図５】同実施の形態になるシャフトとヨークの連結構造の連結作業において、ボルト孔同士を一致させた状態を、図４のＢ−Ｂ線上で断面とし、矢の方向に見て示す横断面図である。
【図６】同実施の形態になるシャフトとヨークの連結構造の連結作業において、ボルトの締め付けトルクＴと、継手ヨークの軸線Ｘ１およびシャフトの軸線Ｘ２の距離ｄとの関係を示すグラフである。
【符号の説明】
１，２，３ シャフト
４，５ 自在継ぎ手
６，２６ 継手ヨーク
７，８ 側壁部
９ Ｕ字溝底壁部
１０ Ｕ字溝
１１，１２ シャフト側面
１４ 軸受舌片[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection operation between a shaft for transmitting the steering rotation of a steering mechanism of an automobile and a yoke of a universal joint under a work environment with many restrictions, and particularly, a yoke for a universal joint and a yoke for a universal joint with a simple operation. It proposes a structure that can connect shafts.
[0002]
[Prior art]
When assembling the connection structure of the intermediate shaft that connects the steering column and the steering gear box of the car, in order to prevent rattling and abnormal noise during steering, the rotation axis of one shaft is rotated by the rotation of the other joint yoke. The centering work to make the axis completely coincide with the axis must be performed without error, and the connection must be made without generating a gap between the shaft and the joint yoke, particularly, a gap in the circumferential direction around the rotation axis. However, the operation must be performed in a narrow and dark space deep in the vicinity of the feet of the driver's seat, and there is a problem in work efficiency such as an unnatural work posture. For this reason, for the purpose of improving the working efficiency and improving the accuracy of the connection work, conventionally, for example, those described in Patent Documents 1 to 3 are known.
[0003]
[Patent Document 1]
JP-A-11-30241 [Patent Document 2]
JP-A-10-169664 [Patent Document 3]
JP-A-11-270570
The connecting structure of the yoke and the shaft described in Patent Document 1 uses a spring force of a tab made of a thin pressed steel plate to apply a pressing force to the shaft fitted in the U-shaped groove of the yoke, thereby performing the centering operation. It is intended to be performed accurately and efficiently.
Further, in the connecting structure of the yoke and the shaft described in Patent Documents 2 and 3, a thin pressed steel plate cam member is laid over the opening side of the U-shaped groove of the yoke to apply a pressing force to the shaft fitted in the U-shaped groove. Thus, the aligning operation can be performed accurately and efficiently.
[0005]
[Problems to be solved by the invention]
However, the conventional connection structure between the yoke and the shaft has the following problems. That is, although the gap between the shaft and the yoke can be reduced, it cannot be confirmed whether the gap in the rotational circumferential direction has been completely eliminated. As a result, there is a possibility that a gap in the rotational circumferential direction may be generated due to an assembling operation, a variation in component accuracy, or the like. In addition, since it is made of a thin pressed steel plate, there is a concern that the alignment may be deviated or the above gap may be generated due to long-term component deterioration after the assembling work. Further, it is necessary to insert small components such as tab members and cam members into the bolt holes, which is not preferable in terms of manufacturing cost, such as an increase in the number of components and an increase in work efficiency.
[0006]
The present invention proposes a connection structure of a yoke and a shaft that is more durable for a long period of time by performing a more secure assembling operation, performing a more secure alignment, and eliminating a gap in the rotational direction.
[0007]
[Means for Solving the Problems]
For this purpose, the connecting structure of the yoke and the shaft according to the present invention is as described in claim 1.
A shaft that rotates during operation,
A yoke having a substantially inverted U-shaped cross-section for inserting one end of the shaft,
In a connection structure for connecting the yoke and the shaft by inserting one end of the shaft into a connection portion of the yoke and fastening them,
The cross section of the connecting portion of the yoke has a shape that tapers from the substantially inverted U-shaped opening to the top,
The cross section of one end of the shaft has a shape that tapers in a direction of insertion of the yoke into a coupling portion,
In connecting the yoke and the shaft, the shaft is inserted into the coupling portion of the yoke so that the rotation axis of the yoke matches the rotation axis of the shaft, and then the two are fastened. It is what it was.
[0008]
【The invention's effect】
According to the configuration of the present invention, when the shaft is pushed into the U-shaped coupling portion of the yoke, both side surfaces of the shaft receive pressure from both the U-shaped side walls and can be connected without a gap. Also, in the factory, when tightening with a constant torque using an air ratchet wrench, etc., since the shaft is pushed between the U-shaped both side walls using a fastening tool, the above pushing amount should be controlled by tightening with a constant torque. It is possible to perform accurate alignment with a simple operation. Furthermore, since the shaft is press-fitted between the U-shaped side walls by tightening using bolts, the shaft is tightly fitted by receiving pressure from the U-shaped side walls, and after a long period of time. Even so, it is possible to enhance the reliability of the connection structure without any displacement of the gap or the rotation axis and without generation of abnormal noise or rattling.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing a steering mechanism using a connection structure between a shaft and a yoke according to an embodiment of the present invention.
One end of the first shaft 1 connected to a steering wheel not shown and rotating in the axial direction is connected to one end of the second shaft 2 via a universal joint 4, and the other end of the second shaft 2 is connected to a universal joint 5. And the other end of the third shaft 3 is connected to a steered wheel (not shown). Therefore, when the driver rotates a steering wheel (not shown), the shafts 1, 2, and 3 rotate, and steered wheels (not shown) are steered. The universal joints 4 and 5 connect one end of a set of joint yokes, and the other end of the joint yoke is connected to the shaft 1, 2, or 3, respectively.
[0010]
The connection structure between the shaft and the yoke according to the present invention may be used in any of the universal joints 4 and 5, but in particular, the third shaft 3 which is a chassis side member and the driver side member. The work to connect the joint yoke 6 must be performed in a narrow and dark space deep in the vicinity of the foot of the driver's seat in the final step of the assembling work, and an unnatural working posture is forced to be solved by the present invention. including.
[0011]
FIG. 2 is an enlarged view of the vicinity of the universal joint 5, in which (a) is a side view of a joint yoke 6 used in a connecting structure of a shaft and a yoke according to the present embodiment, and (b) is one end of the shaft 3. FIG. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 and viewed in the direction of the arrow, where (b) is a cross-sectional view of the yoke 6 and (c) is a cross-section of the shaft 3. FIG. 3A is a side view of a bolt 13 for press-fitting and tightening the shaft 3 into the yoke 6.
[0012]
The joint yoke 6, which is a driver side member, rotates about the axis X1 during steering. The joint yoke 6 has mutually opposing side walls 7, 8 at one end with respect to the axis X1. The U-shaped groove 10 extending in the direction of the axis X1 is formed by integrally connecting opposing ends of the side walls 7, 8 with a bottom wall 9 extending in the direction of the axis X1.
On the other hand, a pair of bearing tongues 14, 14 forming part of the universal joint 5 are provided at the other end of the joint yoke 6 with respect to the axis X <b> 1 so as to face each other. Holes 14b, 14b for inserting a joint member (not shown) are formed in the bearing tongues 14, 14 so as to face each other, and the centers of the holes 14b, 14b coincide with the axis X1. The bearing tongues 14, 14 are connected to the joint yoke 26 facing to form the universal joint 5.
[0013]
The inner surfaces of the side walls 7 and 8 of the U-shaped groove 10 are planes facing each other and are slightly non-parallel, and the distance between the inner surfaces of the side walls 7 and 8 increases toward the open side of the U-shaped groove 10. I do. The U-shaped groove 10 is bilaterally symmetric with respect to the axis of symmetry Y. A bolt hole 9b is formed in the center of the bottom wall 9 in the direction of the axis of symmetry Y, and a female screw is formed on the inner periphery of the hole 9b. The bolt hole 9b is orthogonal to the axis X1. Then, the outer periphery 9f at the center of the bottom wall 9 is formed into a plane perpendicular to the axis of symmetry Y to improve the contact with the head of the bolt 13 inserted into the bolt hole 9b.
[0014]
The shaft 3, which is a chassis-side member, rotates about the axis X1 during steering.
The flat shaped side surfaces 11 and 12 of the shaft 3 are slightly non-parallel, and the intersection angle matches the intersection angle of the inner side surfaces of the side walls 7 and 8. Further, the width B passing through the axis X2 perpendicular to the axis of symmetry Y of the shaft 3 is slightly larger than the separation distance H on the axis X1 of the inner side surfaces of the side walls 7, 8. A bolt hole 3b is formed in the shaft 3 so as to coincide with the axis of symmetry Y, and a female screw is formed in the inner periphery of the hole 3b. The bolt hole 3b is orthogonal to the axis X2 of the shaft.
[0015]
In connecting the joint yoke 6 of the driver's seat-side member and the shaft 3 of the chassis-side member, one end of the shaft 3 is fitted into the U-shaped groove 10 and the shafts X1 and X2 are aligned with each other. First, when the shaft 3 is pushed into the U-shaped groove 10 in the direction of the thick arrow with the bolt holes 9b and the bolt holes 3b aligned as shown in FIGS. 2 and 3, the state shown in FIGS. 4 and 5 is obtained. . Next, when the bolt 13 is inserted into the bolt hole 9b and the bolt hole 3b from the bottom wall 9f side, both axes X1 and X2 are parallel and approach by a distance d. Finally, the bolts 13 are tightened with a predetermined tightening torque, whereby the shaft 3 is pushed into the depth of the U-shaped groove 10. When the axis X1 of the shaft 3 matches the axis X2 of the joint yoke 6, the connection operation is completed. Assuming that the distance between the axis X1 of the joint yoke 6 and the axis X2 of the shaft 3 is d, the relationship between d and the tightening torque T of the bolt 13 is shown in a graph as shown in FIG. By managing the tightening torque T between the fixed values T1 and T2, the axes X1 and X2 are made to coincide with each other.
[0016]
According to the present embodiment, the inner surfaces of the side walls 7 and 8 of the U-shaped groove 10 are slightly non-parallel planes facing each other, and the width B of the shaft 3 in the cross section axis X2 is When the one end of the shaft 3 is fitted into the U-shaped groove 10, the bolt 13 is inserted and fastened to the U-shaped groove 10 by a taper effect. The side walls 7, 8 are firmly connected with the shaft 3 held therebetween. For this reason, the clearance between the shaft and the yoke in the rotational circumferential direction can be reliably eliminated, and rattling and abnormal noise during steering can be prevented.
[0017]
Further, since the bolt 13 is engaged with the bolt hole 9b of the joint yoke 6 and the bolt hole 3b of the shaft 3, first, the axis X1 of the joint yoke 6 and the axis X2 of the shaft 3 can be aligned in parallel, and Since the shaft 3 is press-fitted into the U-shaped groove 10 with a certain value of the tightening torque T1 to T2, the axis X1 of the yoke 6 and the axis X2 of the shaft 3 can be easily aligned.
[0018]
In addition, since the female screw is engraved in the bolt hole 3b, the centering can be easily performed only by fastening the bolt 13, so that components such as nuts are not required, thereby reducing the number of components and improving work efficiency. can do.
In addition, in order to obtain a press-fitting effect due to the taper angle, the intersection angle of the inner side surfaces of the side walls 7 and 8 is preferably about 5 degrees.
[Brief description of the drawings]
FIG. 1 is a side view showing a steering mechanism using a connection structure between a shaft and a yoke according to an embodiment of the present invention;
FIG. 2 is an exploded view showing a connecting procedure of a connecting structure of the shaft and the yoke according to the embodiment;
(A) is a side view of the joint yoke,
(B) is a side view of the shaft.
FIG. 3 is an exploded view showing a connecting structure of the shaft and the yoke according to the embodiment in a cross section taken along line AA of FIG. 2 and viewed in a direction of an arrow;
(A) is a side view of the fastening bolt,
(B) is a cross-sectional view of the joint yoke,
(C) is a cross-sectional view of the shaft.
FIG. 4 is a side view showing a state in which bolt holes are aligned with each other in a connecting operation of the connecting structure of the shaft and the yoke according to the embodiment.
FIG. 5 is a cross-sectional view taken along line BB in FIG. 4 showing a state in which the bolt holes are aligned with each other in the connecting operation of the connecting structure of the shaft and the yoke according to the embodiment; FIG.
FIG. 6 is a graph showing a relationship between a bolt tightening torque T and a distance d between an axis X1 of the joint yoke and an axis X2 of the shaft in a connecting operation of the connecting structure of the shaft and the yoke according to the embodiment.
[Explanation of symbols]
1, 2, 3 Shaft 4, 5 Universal joint 6, 26 Joint yoke 7, 8 Side wall 9 U-shaped groove bottom wall 10 U-shaped groove 11, 12 Shaft side 14 Bearing tongue

Claims (2)

動作時に回転するシャフトと、
該シャフトの一端を挿入する略逆Ｕ字形断面の結合部を有するヨークとを具え、 前記ヨークの結合部に前記シャフトの一端を挿入し、これらを締結することにより前記ヨークと前記シャフトとを連結する連結構造において、
前記ヨークの結合部の断面を、前記略逆Ｕ字形の開口部から頂部にかけて先細となる形状とすると共に、
前記シャフトの一端の断面を、前記ヨークの結合部への挿入方向に向かって先細となる形状とし、
前記ヨークと前記シャフトとの連結に際し、前記ヨークの回転軸線と前記シャフトの回転軸線とが一致するように前記シャフトを前記ヨークの結合部に挿入し、その後両者を締結するよう構成したことを特徴とするシャフトとヨークの連結構造。A shaft that rotates during operation,
A yoke having a coupling portion having a substantially inverted U-shaped cross-section for inserting one end of the shaft, and connecting the yoke and the shaft by inserting one end of the shaft into the coupling portion of the yoke and fastening them. In the connection structure to
The cross section of the connecting portion of the yoke has a shape that tapers from the substantially inverted U-shaped opening to the top,
The cross section of one end of the shaft has a shape that tapers in a direction of insertion of the yoke into a coupling portion,
In connecting the yoke and the shaft, the shaft is inserted into the coupling portion of the yoke so that the rotation axis of the yoke matches the rotation axis of the shaft, and then the two are fastened. The connection structure between the shaft and the yoke. 請求項１に記載の連結構造において、
前記ヨークの結合部の略逆Ｕ字形の頂部にねじ孔を、当該頂部を貫通するように形成すると共に、前記シャフトの一端にもねじ孔を、シャフトを貫通するように形成し、
各ねじ孔が一致するよう位置合わせして、前記ヨークの結合部に前記シャフトの一端を挿入した後、これらねじ孔にボルトを挿通することにより両者を締結するよう構成したことを特徴とするシャフトとヨークの連結構造。The connection structure according to claim 1,
A screw hole is formed at a substantially inverted U-shaped top of the coupling portion of the yoke, so as to penetrate the top, and a screw hole is formed at one end of the shaft so as to penetrate the shaft.
A shaft, characterized in that the screw holes are aligned so that they coincide with each other, one end of the shaft is inserted into the joint of the yoke, and bolts are inserted through these screw holes to fasten the two. And yoke connection structure.
JP2003159631A 2003-06-04 2003-06-04 Connecting structure of shaft and yoke Pending JP2004360786A (en)

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Family Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010272008A (en) * 2009-05-22 2010-12-02 Hitachi Omron Terminal Solutions Corp Card processing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010272008A (en) * 2009-05-22 2010-12-02 Hitachi Omron Terminal Solutions Corp Card processing device

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