JP2005048803A - Yoke for universal joint - Google Patents

Yoke for universal joint Download PDF

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Publication number
JP2005048803A
JP2005048803A JP2003203511A JP2003203511A JP2005048803A JP 2005048803 A JP2005048803 A JP 2005048803A JP 2003203511 A JP2003203511 A JP 2003203511A JP 2003203511 A JP2003203511 A JP 2003203511A JP 2005048803 A JP2005048803 A JP 2005048803A
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JP
Japan
Prior art keywords
holding cylinder
yoke
universal joint
pin receiving
holding
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.)
Pending
Application number
JP2003203511A
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Japanese (ja)
Inventor
Akiko Ueno
晶子 上野
Shuzo Hiragushi
周三 平櫛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP2003203511A priority Critical patent/JP2005048803A/en
Publication of JP2005048803A publication Critical patent/JP2005048803A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08Couplings 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
    • F16D1/0852Couplings 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 between the mating surfaces of the hub and shaft
    • F16D1/0864Couplings 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 between the mating surfaces of the hub and shaft due to tangential loading of the hub, e.g. a split hub
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38Hooke'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
    • F16D3/382Hooke'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
    • F16D3/387Fork construction; Mounting of fork on shaft; Adapting shaft for mounting of fork
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/103Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yoke of simple structure for a universal joint improved in shaft holding strength and possible to be used with a large load. <P>SOLUTION: A holding cylinder 20 provided with split grooves 24 and 24 extended in the longitudinal direction is formed in a peripheral wall at opposite two positions by bending a plate material connected to cross directional both sides of an arm board 25. Both longitudinal ends of the arm board 25 extended in a side corresponding to circumferential positions of the split grooves 24 and 24 are bent at a nearly right angle toward a side opposite to the holding cylinder 20 to form pin receiver arms 21 and 21. A fastening ring 7 is fitted on the holding cylinder 20, and fastened by a bolt 8 and a nut 80, and diameter of the holding cylinder 20 is thereby shrunken by shrinkage width of the split grooves 24 and 24 to hold the shaft 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、軸心が交叉、又は偏心した2本のシャフトを回転伝達可能に連結すべく用いられる自在継手のヨークに関する。
【0002】
【従来の技術】
多くの産業分野において、軸心が交叉、又は偏心した2本のシャフトを回転伝達可能に連結するために広く用いられている自在継手(ユニバーサルジョイント)は、連結対象となるシャフトを内嵌保持する保持筒の一側に二股に分岐するピン受けアームを連設して構成された一対のヨークを備え、これらのヨークを、夫々のピン受けアームが略直角をなして交叉するように向き合わせ、各ピン受けアームの先端部に貫通形成された受け孔に嵌合する十字形のクロスピンにより連結してなる公知の機械要素である。
【0003】
このような自在継手のヨークにおいて、シャフトを保持する保持筒は、多くの場合、円筒体の周壁の一部に軸長方向に延びる割り溝を備え、該割り溝の両側縁に沿って締め付け用のブラケットを設けてなり、該ブラケットに挿通されたボルトの締め付けにより前記割り溝の縮幅を伴って縮径して、内部に嵌め込まれたシャフトを強固に保持するように構成されている。
【0004】
この種のヨークは、保持筒に設けられる割り溝の周方向位置に応じて、所謂、腹割れ型のヨークと背割れ型のヨークとに分類される。腹割れ型のヨークは、ピン受けアームの受け孔の軸心、即ち、該受け孔に連結されるクロスピンの軸心と略直交する周方向位置に割り溝を備え、逆に背割れ型のヨークは、クロスピンの軸心と略一致する周方向位置に割り溝を備えている。これらは、各1個を組み合わせて用いた場合、クロスピンにより連結された状態においてボルトの締め付け方向が同一となり、例えば、周辺スペースが限られた場所での組み付けを容易に行わせることが可能となる(例えば、特許文献1参照)。
【0005】
このような2種のヨークのうち、腹割れ型のヨークは、保持筒の周壁の割り溝の位置がピン受けアームの対向面間に位置することから、従来から、一枚の板材を割り溝を余して円筒形に曲げ、前記板材の一方の端縁の2箇所に予め突設されたアーム片をピン受けアームとして残す手順により、プレス成形により製造することが提案されている(例えば、特許文献2参照)。
【0006】
【特許文献1】
特開平11−218148号公報
【特許文献2】
特開2003−28187号公報
【0007】
【発明が解決しようとする課題】
ところが、以上の如くプレス成形により製造される従来のヨークは、保持筒に設けられる割り溝がピン受けアームの対向面間に連通する形態をなすことから、使用状態下でのピン受けアームへの作用力が、前記割り溝を直接的に拡幅するように加わるため、シャフトの保持強度が不足し、大負荷での使用に適さないという問題があった。
【0008】
特許文献2においては、割り溝の両側縁に沿って設けられるボルト締め付け用のブラケットを、ピン受けアームの対向面間への連通部にまで延長し、更に、このブラケットに補強用のリブを一体成形することにより保持強度を高めるようにしているが、この構成においても十分な強度を得ることは難しい。
【0009】
本発明は斯かる事情に鑑みてなされたものであり、シャフトの保持強度が高く大負荷での使用が可能な自在継手のヨークを簡易に提供することを目的とする。
【0010】
【課題を解決するための手段】
本発明の第1発明に係る自在継手のヨークは、シャフトを内嵌保持する保持筒と、該保持筒の一側に連設され、二股に分岐された夫々の先端にクロスピンの受け孔を有するピン受けアームとを備え、前記保持筒の周壁の前記受け孔の軸心の方向と略一致する周方向位置に割り溝を備える自在継手のヨークにおいて、前記保持筒及びピン受けアームは、板材の曲げ成形により一体に構成してあることを特徴とする。
【0011】
本発明においては、シャフトを保持する保持筒の周壁に設けられる割り溝の周方向位置が、該保持筒の一側にて二股に分岐されたピン受けアームに設けられるピン受け孔の方向と略一致しており、使用状態下での外力の作用による割り溝の拡幅が生じ難い背割れ型のヨークを、板材の曲げ成形により、保持筒及びピン受けアームを含めて一体に構成する。このような背割れ型のヨークは、使用状態下にて加わる外力の作用による割り溝の拡幅が生じ難く、大負荷での使用が可能となる。
【0012】
また本発明の第2発明に係る自在継手のヨークは、前記保持筒に外嵌され、該保持筒に締め付け力を加える締め付けリングを備えることを特徴とする。
【0013】
この発明においては、シャフトを保持する保持筒に締め付けリングを外嵌し、この締め付けリングを介して保持筒に締め付け力を加え、該保持筒に内嵌されたシャフトを固定する。締め付けリングは、保持筒の周方向に回転させることにより締め付けのためのボルトの位置を変えることができ、背割れ型又は腹割れ型としての組み付けが可能となる。
【0014】
【発明の実施の形態】
以下本発明をその実施の形態を示す図面に基づいて詳述する。図1は、本発明に係るヨークを備える自在継手の使用状態を示す側面図である。
【0015】
図示の如く自在継手1は、一対のヨーク2,3を十字形のクロスピン4により連結して構成され、2本のシャフト5、6を回転伝達可能に連結している。ヨーク2は、シャフト5を内嵌保持する円筒形の保持筒20と、該保持筒20の一側に連設され、二股に分岐する一対のピン受けアーム21,21とを備えている。ピン受けアーム21,21の先端部には、保持筒20の軸心と直交する向きに同軸をなして貫通形成された受け孔22,22が設けてある。これらの受け孔22,22には、夫々に嵌着保持された軸受23,23を介してクロスピン4の対向端部が内嵌保持されている。
【0016】
図2は、ヨーク2の外観斜視図である。本図に示す如く保持筒20は、周壁の相対向する2箇所に、軸長方向の全長に亘って延設された割り溝24,24を備えている。また、保持筒20の一側端部は、平板状をなすアーム基板25により全面に亘って塞がれており、保持筒20は、割り溝24,24の形成位置と略直交する周方向位置において、アーム基板25の両側縁に適幅に亘って接続されている。なお図2中には、片側の接続部のみが示されている。
【0017】
アーム基板25は、割り溝24,24の形成位置を含む保持筒20の径方向に延長されており、これらの延長部の夫々は、保持筒20の連設側と逆向きに略直角をなして屈曲され、ピン受けアーム21,21が一体形成されている。ピン受けアーム21,21の先端部には、前述の如く受け孔22,22が貫通形成されており、これらの受け孔22,22の夫々には、図2中に2点鎖線により示す軸受23,23が嵌着保持されるようになしてある。
【0018】
保持筒20の他側端部は、全面に亘って開放されており、保持筒20の内面には、開放側端部から適長に亘ってスプライン26が形成されている。保持筒20に内嵌保持されるシャフト5は、図2中に2点鎖線により示されている。このシャフト5の外周面には、保持筒20内周のスプライン26と対応するスプライン50が形成されており、開放側端部から保持筒20に内嵌されたシャフト5は、両者の嵌合周面におけるスプライン26,50の噛合により一体回転可能に連結されるようになしてある。
【0019】
また保持筒20の中途部には、締め付けリング7が外嵌されている。この締め付けリング7は、適幅の帯板を保持筒20への嵌め込みが可能な内径を有する円環状に曲げ、両端部を径方向外向きに屈曲させ、適宜のギャップを隔てて対向する締め付けフランジ70,70を一体成形して構成されている。これらの締め付けフランジ70,70には、締め付けリング7の軸方向と略直交する向きに貫通形成されたボルト孔71,71が設けてある。
【0020】
締め付けリング7は、保持筒20の周方向において、締め付けフランジ70,70間のギャップが割り溝24,24の一方に略整合するように位置決めされ、この状態でボルト孔71,71に挿通されたボルト8の端部にナット80を螺合させ、これらを締め付けフランジ70,70の外面に緩く締め付けて仮止めされている。このような締め付けリング7は、ボルト8及びナット80の更なる締め付けにより、締め付けフランジ70,70間のギャップの縮幅を伴って縮径し、保持筒20を外側から締め付ける作用をなす。保持筒20は、前述の如く周壁の二か所に割り溝24,24を備えており、締め付けリング7の締め付けにより割り溝24,24の縮幅を伴って縮径することができ、この縮径により保持筒20に内嵌されたシャフト5は、軸長方向への抜け出し不可に保持される。
【0021】
図3は、以上の如く構成されたヨーク2の製造手順の説明図である。ヨーク2は、図3(a)に示す如く、一方向に長い矩形形状を有する中央板90の幅方向両側に、これよりも短寸の矩形形状を有する側板91,91が連設された素材板9を用いる。中央板90と側板91,91とは、両者の長手方向中央部に適幅の接続部を残してスリット92,92により隔絶されている。また中央板90の長手方向の両端部は、半円形に成形されている。
【0022】
このような素材板9に対し、まず、図3(b)に示す如く、中央板90の両端部の夫々が厚さ方向の同側に向けて略直角をなすように折り曲げられ、アーム基板25とピン受けアーム21,21とが成形される。次いで、図3(c)に示す如く、側板91,91の夫々がアーム基板25との接続部を折り線とし、ピン受けアーム21,21と逆向きに略直角をなすように折り曲げられ、次いで、折り曲げられた側板91,91の夫々が同径の半円形状をなすように屈曲され、図3(d)に示す如く、夫々の端縁間に割り溝24,24を残して円筒形の保持筒20が成形される。最後に、図3(d)中に2点鎖線により示す如く、ピン受けアーム21,21の夫々に受け孔22,22を形成して、図2に示すヨーク2が製造される。
【0023】
このように本発明に係る自在継手1のヨーク2は、平板状をなす素材板9の曲げ成形により簡易に製造することができる上、保持筒20の周壁の割り溝24,24の周方向位置が、ピン受けアーム21,21の先端の受け孔22,22の軸心の方向と略一致する背割れ型となっており、使用状態下でのピン受けアーム21,21への作用力が割り溝24,24を拡幅するように加わる虞れがなく、シャフト5を強固に保持することができ、大負荷が加わる用途への使用が可能となる。
【0024】
なお、保持筒20とアーム基板25とは、後者の幅方向両側の一部において接続されているのみであるが、前述した成形により得られる保持筒20は、端面の全周に亘ってアーム基板25と当接しており、ピン受けアーム21,21の延設方向に加わる曲げ力に対してもアーム基板25を支えとして十分な強度を有している。この強度は、更に、保持筒20の端面とアーム基板25との当接部に対して溶接を実施し、両者を一体化させることにより一層高めることができる。
【0025】
図4は、他方のヨーク3の外観斜視図である。該ヨーク3も、周壁に割り溝34,34を備え、内面にスプライン36が形成された保持筒30と、該保持筒30一側が当接されたアーム基板35の端部を曲げ成形してなるピン受けアーム31,31とを備え、これらのピン受けアーム31,31の先端に貫通形成された受け孔32,32の夫々に軸受33,33を嵌着保持させた構成となっており、前述したヨーク2と全く同様の成形手順にて製造される。
【0026】
またヨーク3は、保持筒30に外嵌された締め付けリング7を備える。この締め付けリング7は、ヨーク2の保持筒20に外嵌された締め付けリング7と全く同じものであるが、締め付けフランジ70,70間のギャップの位置が割り溝34,34の周方向位置と直交するように位置決めされ、この状態でボルト8及びナット80を締め付けて仮止めされている。
【0027】
従って、このようなヨーク3においては、締め付けリング7による保持筒30の締め付けを、ピン受けアーム31,31の延設方向から実施することができ、腹割れ型のヨークと同様の組み付けが可能である。これにより、ヨーク2及びヨーク3をクロスピン4により連結してなる自在継手1により、シャフト5とシャフト6とを連結する場合、ヨーク2の締め付けのためのボルト8と、ヨーク3の締め付けのためのボルト8とが、図1に示す如く、同一の方向に向くことなり、これらの締め付けを同側から実施することができ、周辺スペースが限られた場所での組み付けを容易に行わせることが可能となる。
【0028】
なお、締め付けリング7は、組み付け段階においてヨーク2の保持筒20及びヨーク3の保持筒30の周方向に適宜に変更することができ、ボルト8の締め付け操作に都合の良い位置への変更により、一層簡易な組み付けが可能となる。
【0029】
【発明の効果】
以上詳述した如く本発明に係る自在継手のヨークにおいては、保持筒に設けられた割り溝が使用状態下での外力に対して強い位置にある背割れ型のヨークを板材の曲げ成形により一体構成することができ、保持筒に内嵌されたシャフトの保持強度が高く、大負荷での使用が可能な自在継手を簡易に構成することが可能となる等、本発明は優れた効果を奏する。
【図面の簡単な説明】
【図1】本発明に係るヨークを備える自在継手の使用状態を示す側面図である。
【図2】一方のヨークの外観斜視図である。
【図3】図2に示すヨークの製造手順の説明図である。
【図4】他方のヨークの外観斜視図である。
【符号の説明】
1 自在継手
2 ヨーク
3 ヨーク
4 クロスピン
7 締め付けリング
20,30 保持筒
21,31 ピン受けアーム
22,32 受け孔
24,34 割り溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a universal joint yoke used to connect two shafts whose shaft centers are crossed or eccentric so as to transmit rotation.
[0002]
[Prior art]
In many industrial fields, universal joints (universal joints) that are widely used to connect two shafts whose shaft centers intersect or are eccentric so as to transmit rotation can be internally fitted and held. Provided with a pair of yokes that are configured by connecting a pin receiving arm that branches into two branches on one side of the holding cylinder, these yokes face each other so that each pin receiving arm intersects at a substantially right angle, This is a known mechanical element that is connected by a cross-shaped cross pin that fits into a receiving hole formed through the tip of each pin receiving arm.
[0003]
In such a universal joint yoke, the holding cylinder for holding the shaft is often provided with a split groove extending in the axial length direction in a part of the peripheral wall of the cylindrical body, and is tightened along both side edges of the split groove. The bracket is provided, and the diameter of the split groove is reduced by tightening a bolt inserted into the bracket, so that the shaft fitted therein is firmly held.
[0004]
This type of yoke is classified into a so-called belly crack type yoke and a back crack type yoke according to the circumferential position of the split groove provided in the holding cylinder. The belly crack type yoke has a split groove at a circumferential position substantially orthogonal to the axis of the receiving hole of the pin receiving arm, that is, the axis of the cross pin connected to the receiving hole. Is provided with a split groove at a circumferential position substantially coinciding with the axis of the cross pin. When one of these is used in combination, the tightening direction of the bolt is the same when connected by a cross pin, and for example, it is possible to easily perform assembly in a place where the peripheral space is limited. (For example, refer to Patent Document 1).
[0005]
Of these two types of yokes, the split-type yoke has a split groove on the peripheral wall of the holding cylinder located between the opposing surfaces of the pin receiving arm. It is proposed to be manufactured by press molding by the procedure of leaving the arm piece preliminarily provided at two places on one end edge of the plate material as a pin receiving arm by bending the plate into a cylindrical shape (for example, Patent Document 2).
[0006]
[Patent Document 1]
JP 11-218148 A [Patent Document 2]
Japanese Patent Laid-Open No. 2003-28187
[Problems to be solved by the invention]
However, the conventional yoke manufactured by press molding as described above has a configuration in which the split groove provided in the holding cylinder communicates between the opposing surfaces of the pin receiving arm. Since the acting force is applied so as to directly widen the split groove, there is a problem that the holding strength of the shaft is insufficient and it is not suitable for use under a heavy load.
[0008]
In Patent Document 2, a bolt tightening bracket provided along both side edges of a split groove is extended to a communicating portion between opposing surfaces of a pin receiving arm, and a reinforcing rib is integrated with the bracket. Although the holding strength is increased by molding, it is difficult to obtain sufficient strength even in this configuration.
[0009]
The present invention has been made in view of such circumstances, and an object of the present invention is to simply provide a universal joint yoke that has a high shaft holding strength and can be used under a large load.
[0010]
[Means for Solving the Problems]
The universal joint yoke according to the first aspect of the present invention has a holding cylinder for internally fitting and holding the shaft, and a cross-pin receiving hole provided at one end of the holding cylinder that is connected to one side of the holding cylinder. A universal joint yoke including a pin receiving arm and having a split groove at a circumferential position substantially coincident with the axial direction of the receiving hole of the peripheral wall of the holding cylinder. It is characterized by being integrally formed by bending.
[0011]
In the present invention, the circumferential position of the split groove provided in the peripheral wall of the holding cylinder holding the shaft is substantially the same as the direction of the pin receiving hole provided in the pin receiving arm that is bifurcated on one side of the holding cylinder. A back-cracked yoke that is in agreement and is difficult to cause the split groove to be widened by the action of an external force under use is integrally formed by bending the plate material, including the holding cylinder and the pin receiving arm. Such a back-cracked yoke is less likely to widen the split groove due to the action of an external force applied in use, and can be used with a heavy load.
[0012]
The yoke of the universal joint according to the second aspect of the present invention is characterized in that it includes a tightening ring that is fitted on the holding cylinder and applies a tightening force to the holding cylinder.
[0013]
In the present invention, a tightening ring is externally fitted to a holding cylinder that holds the shaft, a tightening force is applied to the holding cylinder through the tightening ring, and the shaft fitted inside the holding cylinder is fixed. The tightening ring can be rotated in the circumferential direction of the holding cylinder to change the position of the bolt for tightening, and can be assembled as a back cracking mold or a belly cracking mold.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a side view showing a use state of a universal joint including a yoke according to the present invention.
[0015]
As shown in the figure, the universal joint 1 is configured by connecting a pair of yokes 2 and 3 with a cross-shaped cross pin 4 and connecting two shafts 5 and 6 so as to be able to transmit rotation. The yoke 2 includes a cylindrical holding cylinder 20 that fits and holds the shaft 5 and a pair of pin receiving arms 21 and 21 that are connected to one side of the holding cylinder 20 and branch into two branches. At the tip portions of the pin receiving arms 21, 21, receiving holes 22, 22 are formed so as to penetrate in a direction perpendicular to the axis of the holding cylinder 20. In these receiving holes 22, 22, the opposite ends of the cross pin 4 are fitted and held via bearings 23, 23 fitted and held respectively.
[0016]
FIG. 2 is an external perspective view of the yoke 2. As shown in the figure, the holding cylinder 20 is provided with split grooves 24 and 24 extending over the entire length in the axial length direction at two opposite positions of the peripheral wall. Further, one end of the holding cylinder 20 is closed over the entire surface by a flat arm substrate 25, and the holding cylinder 20 is positioned in a circumferential direction substantially orthogonal to the formation positions of the split grooves 24 and 24. The arm substrate 25 is connected to both side edges over an appropriate width. In FIG. 2, only the connection portion on one side is shown.
[0017]
The arm substrate 25 is extended in the radial direction of the holding cylinder 20 including the formation positions of the split grooves 24, 24, and each of these extensions forms a substantially right angle in the direction opposite to the continuous side of the holding cylinder 20. The pin receiving arms 21 and 21 are integrally formed. As described above, the receiving holes 22 and 22 are formed through the tip end portions of the pin receiving arms 21 and 21. The bearing holes 23 are indicated by two-dot chain lines in FIG. , 23 are fitted and held.
[0018]
The other end of the holding cylinder 20 is open over the entire surface, and a spline 26 is formed on the inner surface of the holding cylinder 20 from the open end to an appropriate length. The shaft 5 that is fitted and held in the holding cylinder 20 is indicated by a two-dot chain line in FIG. A spline 50 corresponding to the spline 26 on the inner periphery of the holding cylinder 20 is formed on the outer peripheral surface of the shaft 5, and the shaft 5 fitted into the holding cylinder 20 from the open side end portion has a fitting periphery of both. The splines 26 and 50 are engaged with each other so as to be integrally rotatable.
[0019]
A tightening ring 7 is fitted on the middle of the holding cylinder 20. The tightening ring 7 is formed by bending a band plate having an appropriate width into an annular shape having an inner diameter that can be fitted into the holding cylinder 20, bending both ends radially outward, and facing each other with an appropriate gap therebetween. 70 and 70 are integrally formed. These fastening flanges 70 and 70 are provided with bolt holes 71 and 71 penetratingly formed in a direction substantially orthogonal to the axial direction of the fastening ring 7.
[0020]
The tightening ring 7 is positioned in the circumferential direction of the holding cylinder 20 so that the gap between the tightening flanges 70 and 70 is substantially aligned with one of the split grooves 24 and 24, and is inserted into the bolt holes 71 and 71 in this state. A nut 80 is screwed onto the end of the bolt 8, and these are loosely tightened to the outer surfaces of the tightening flanges 70, 70 to be temporarily fixed. Such a tightening ring 7 has a function of tightening the holding cylinder 20 from the outside by further reducing the diameter of the gap between the tightening flanges 70 and 70 by further tightening the bolt 8 and the nut 80. The holding cylinder 20 is provided with the split grooves 24 and 24 at two locations on the peripheral wall as described above, and can be reduced in diameter with the reduced width of the split grooves 24 and 24 by tightening the tightening ring 7. The shaft 5 fitted in the holding cylinder 20 by the diameter is held so that it cannot be pulled out in the axial direction.
[0021]
FIG. 3 is an explanatory diagram of the manufacturing procedure of the yoke 2 configured as described above. As shown in FIG. 3A, the yoke 2 is a material in which side plates 91 and 91 having a rectangular shape shorter than this are connected to both sides in the width direction of a central plate 90 having a rectangular shape that is long in one direction. A plate 9 is used. The central plate 90 and the side plates 91 and 91 are separated from each other by slits 92 and 92, leaving a connection portion having an appropriate width at the central portion in the longitudinal direction of both. Further, both end portions in the longitudinal direction of the central plate 90 are formed in a semicircular shape.
[0022]
With respect to such a material plate 9, first, as shown in FIG. 3 (b), both end portions of the center plate 90 are bent so as to form a substantially right angle toward the same side in the thickness direction, and the arm substrate 25. And pin receiving arms 21 and 21 are formed. Next, as shown in FIG. 3 (c), each of the side plates 91 and 91 is bent so that the connecting portion with the arm substrate 25 is a fold line, and is substantially perpendicular to the pin receiving arms 21 and 21, respectively. Each of the bent side plates 91 and 91 is bent so as to form a semicircular shape having the same diameter, and as shown in FIG. 3 (d), the split grooves 24 and 24 are left between the respective edges to form a cylindrical shape. The holding cylinder 20 is molded. Finally, as shown by a two-dot chain line in FIG. 3 (d), the receiving holes 22 and 22 are formed in the pin receiving arms 21 and 21, respectively, and the yoke 2 shown in FIG. 2 is manufactured.
[0023]
As described above, the yoke 2 of the universal joint 1 according to the present invention can be easily manufactured by bending the flat plate 9 and the circumferential positions of the split grooves 24 and 24 on the peripheral wall of the holding cylinder 20. However, it is a back-crack type that substantially matches the axial direction of the receiving holes 22 and 22 at the tips of the pin receiving arms 21 and 21, and the acting force on the pin receiving arms 21 and 21 under use is reduced. There is no fear that the grooves 24, 24 are widened, the shaft 5 can be firmly held, and it can be used for applications where a heavy load is applied.
[0024]
The holding cylinder 20 and the arm substrate 25 are connected only at a part of both sides in the width direction of the latter, but the holding cylinder 20 obtained by the above-described molding is provided on the arm substrate over the entire circumference of the end surface. 25, and has sufficient strength with the arm substrate 25 as a support against the bending force applied in the extending direction of the pin receiving arms 21 and 21. This strength can be further enhanced by performing welding on the contact portion between the end surface of the holding cylinder 20 and the arm substrate 25 and integrating the two.
[0025]
FIG. 4 is an external perspective view of the other yoke 3. The yoke 3 is also formed by bending a holding cylinder 30 having split grooves 34, 34 on its peripheral wall and having a spline 36 formed on the inner surface, and an end of an arm substrate 35 with which one side of the holding cylinder 30 is in contact. The pin receiving arms 31, 31 are provided, and the bearings 33, 33 are fitted and held in the receiving holes 32, 32 penetratingly formed at the tips of the pin receiving arms 31, 31, respectively. The same manufacturing procedure as that of the yoke 2 is manufactured.
[0026]
Further, the yoke 3 includes a tightening ring 7 fitted on the holding cylinder 30. This tightening ring 7 is exactly the same as the tightening ring 7 fitted on the holding cylinder 20 of the yoke 2, but the position of the gap between the tightening flanges 70, 70 is orthogonal to the circumferential position of the split grooves 34, 34. In this state, the bolt 8 and the nut 80 are tightened and temporarily fixed.
[0027]
Accordingly, in such a yoke 3, the holding cylinder 30 can be tightened by the tightening ring 7 from the extending direction of the pin receiving arms 31, 31 and can be assembled in the same manner as the belly crack type yoke. is there. Thereby, when the shaft 5 and the shaft 6 are connected by the universal joint 1 in which the yoke 2 and the yoke 3 are connected by the cross pin 4, the bolt 8 for fastening the yoke 2 and the fastening for the yoke 3 are connected. As shown in FIG. 1, the bolts 8 are directed in the same direction, so that they can be tightened from the same side, and can be easily assembled in a place where the peripheral space is limited. It becomes.
[0028]
The tightening ring 7 can be appropriately changed in the circumferential direction of the holding cylinder 20 of the yoke 2 and the holding cylinder 30 of the yoke 3 in the assembly stage, and by changing to a position convenient for the tightening operation of the bolt 8, A simpler assembly is possible.
[0029]
【The invention's effect】
As described above in detail, in the universal joint yoke according to the present invention, a back-cracked yoke in which the split groove provided in the holding cylinder is strong against the external force under use is integrated by bending the plate material. The present invention has excellent effects, such as being able to be configured, and having a high holding strength of the shaft fitted inside the holding cylinder, making it possible to easily configure a universal joint that can be used under heavy loads. .
[Brief description of the drawings]
FIG. 1 is a side view showing a use state of a universal joint including a yoke according to the present invention.
FIG. 2 is an external perspective view of one yoke.
3 is an explanatory diagram of a manufacturing procedure of the yoke shown in FIG. 2. FIG.
FIG. 4 is an external perspective view of the other yoke.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Universal joint 2 Yoke 3 Yoke 4 Cross pin 7 Tightening ring 20, 30 Holding cylinder 21, 31 Pin receiving arm 22, 32 Receiving hole 24, 34 Split groove

Claims (2)

シャフトを内嵌保持する保持筒と、該保持筒の一側に連設され、二股に分岐された夫々の先端にクロスピンの受け孔を有するピン受けアームとを備え、前記保持筒の周壁の前記受け孔の軸心の方向と略一致する周方向位置に割り溝を備える自在継手のヨークにおいて、
前記保持筒及びピン受けアームは、板材の曲げ成形により一体に構成してあることを特徴とする自在継手のヨーク。
A holding cylinder for internally fitting and holding the shaft; and a pin receiving arm provided on one side of the holding cylinder and having a cross pin receiving hole at each end of the bifurcated branch, and the peripheral wall of the holding cylinder In a universal joint yoke provided with a split groove at a circumferential position substantially coincident with the direction of the axial center of the receiving hole,
The universal joint yoke according to claim 1, wherein the holding cylinder and the pin receiving arm are integrally formed by bending a plate material.
前記保持筒に外嵌され、該保持筒に締め付け力を加える締め付けリングを備える請求項1記載の自在継手のヨーク。The universal joint yoke according to claim 1, further comprising a tightening ring that is externally fitted to the holding cylinder and applies a tightening force to the holding cylinder.
JP2003203511A 2003-07-30 2003-07-30 Yoke for universal joint Pending JP2005048803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003203511A JP2005048803A (en) 2003-07-30 2003-07-30 Yoke for universal joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
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Family

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Country Status (1)

Country Link
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160370A (en) * 2012-02-08 2013-08-19 Jtekt Corp Universal joint and yoke
EP3144552A4 (en) * 2014-05-13 2018-01-24 NSK Ltd. Joint cross-type universal joint yoke and manufacturing method therefor
JP2018128077A (en) * 2017-02-08 2018-08-16 日本精工株式会社 Coupling structure of yoke and shaft
JP2019044945A (en) * 2017-09-07 2019-03-22 日本精工株式会社 Torque transmission shaft
JP2019052700A (en) * 2017-09-15 2019-04-04 日本精工株式会社 Torque transmission shaft
CN110332244A (en) * 2019-07-04 2019-10-15 杭州灵展科技有限公司 A kind of mechanical power transmission axis
CN111065835A (en) * 2017-09-07 2020-04-24 日本精工株式会社 Torque transmission shaft
JP2020085110A (en) * 2018-11-22 2020-06-04 日本精工株式会社 Torque transmission shaft
EP3667111A4 (en) * 2017-09-07 2020-08-19 NSK Ltd. Torque transmission shaft

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160370A (en) * 2012-02-08 2013-08-19 Jtekt Corp Universal joint and yoke
CN104114890A (en) * 2012-02-08 2014-10-22 株式会社捷太格特 Universal joint and yoke
EP3144552A4 (en) * 2014-05-13 2018-01-24 NSK Ltd. Joint cross-type universal joint yoke and manufacturing method therefor
US10156267B2 (en) 2014-05-13 2018-12-18 Nsk Ltd. Yoke for cross shaft universal joint and method for manufacturing the same
JP2018128077A (en) * 2017-02-08 2018-08-16 日本精工株式会社 Coupling structure of yoke and shaft
JP2019044945A (en) * 2017-09-07 2019-03-22 日本精工株式会社 Torque transmission shaft
CN111065835A (en) * 2017-09-07 2020-04-24 日本精工株式会社 Torque transmission shaft
EP3667111A4 (en) * 2017-09-07 2020-08-19 NSK Ltd. Torque transmission shaft
CN111065835B (en) * 2017-09-07 2022-04-29 日本精工株式会社 Torque transmission shaft
JP2019052700A (en) * 2017-09-15 2019-04-04 日本精工株式会社 Torque transmission shaft
JP2020085110A (en) * 2018-11-22 2020-06-04 日本精工株式会社 Torque transmission shaft
CN110332244A (en) * 2019-07-04 2019-10-15 杭州灵展科技有限公司 A kind of mechanical power transmission axis

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