JP3753058B2

JP3753058B2 - Assembling method and assembling apparatus and phase measuring method and measuring apparatus for combination type spur gear

Info

Publication number: JP3753058B2
Application number: JP2001372208A
Authority: JP
Inventors: 功久小林; 清孝平田; 光男熊谷
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2001-12-06
Filing date: 2001-12-06
Publication date: 2006-03-08
Anticipated expiration: 2021-12-06
Also published as: JP2003172432A

Description

【０００１】
【発明の属する技術分野】
この発明に係る組み合わせ式やまば歯車の組立方法及び組立装置並びに位相測定方法及び測定装置は、自動車用変速機や各種産業機械の動力伝達部に組み込む組み合わせ式やまば歯車を構成する１対のはすば歯車の位相を適正に規制する為に利用する。
【０００２】
【従来の技術】
自動車用変速機や各種産業機械の動力伝達部を構成する複数の歯車は、それぞれはすば歯車としている。この理由は、動力伝達時に、これら各歯車の噛合部で発生する騒音（噛み合い音）を低減させる為である。この様に各歯車をはすば歯車とした場合には、上記自動車用変速機や各種産業機械の運転時に、各歯車の噛合部にスラスト力が発生する。この様に歯車同士の噛合部で発生したスラスト力は、歯車を固設した軸等を軸方向に押圧する。歯車を両端部に設けた伝達軸等の場合には、１対の歯車の（はすばの）傾斜方向を互いに逆にする事により上記スラスト力を相殺する事も可能である。ところが、中間部に１個の歯車のみを設けている回転部材に関しては、この様な方法で上記スラスト力を相殺する事はできない。そして、この様なスラスト力を、上記回転部材を支持している転がり軸受により支承する構造を採用した場合には、この転がり軸受部分の回転抵抗が大きくなり、動力の伝達効率が悪化するだけでなく、この転がり軸受の耐久性も損なわれる。
【０００３】
この様な事情に鑑みて、特開平８−１５９２２９号公報、同９−８９０６３号公報等には、組み合わせ式やまば歯車に関する発明が記載されている。これら各公報に記載された組み合わせ式やまば歯車は、互いに傾斜方向が逆で、且つ、ピッチ、傾斜角度並びに径に関する寸法が互いに等しい１対のはすば歯車を互いに同心に結合固定して成る。この様な組み合わせ式やまば歯車の場合には、動力伝達に伴って上記１対のはすば歯車に、互いに逆方向に同じ大きさのスラスト力が発生する。この為、上記組み合わせ式やまば歯車と共に回転する転がり軸受に大きなスラスト力を支承させる必要がなくなって、動力の伝達効率並びに転がり軸受の耐久性向上を図れる。尚、上記特開平８−１５９２２９号公報には、１対のはすば歯車の位相をずらせる事により噛み合い荷重の変動を抑制し、噛み合い部で発生するノイズ低減を図る技術も記載されている。
【０００４】
【発明が解決しようとする課題】
上述の様な組み合わせ式やまば歯車により構成した動力伝達部の伝達効率を確保し、組み合わせ式やまば歯車同士の噛合部で発生する騒音を抑える為には、この組み合わせ式やまば歯車を構成する１対のはすば歯車同士の位相を適正に規制する必要がある。この位相が少しでもずれていた場合には、上記噛合部の噛み合い抵抗が大きくなり、伝達効率が低下するだけでなく、運転時に発生する騒音が大きくなる。
【０００５】
これに対して、１対のはすば歯車を、これら両はすば歯車同士の位相を所望通りに規制した状態で組み合わせる事は面倒である。特に、噛み合い荷重の変動を抑制すべく、１対のはすば歯車の位相をずらせる構造の場合には、これら両はすば歯車同士の位相のずれを適正値に規制した状態のまま、これら両はすば歯車を組み合わせる事は、従前の技術のままでは困難である。この為、これら両はすば歯車を、円周方向に関する位相を適正に規制した状態のまま組み合わせる方法及び装置、並びに互いに組み合わせた１対のはすば歯車同士の位相が適正か否かを測定する方法及び装置が必要になる。
本発明の組み合わせ式やまば歯車の組立方法及び組立装置並びに位相測定方法及び測定装置は、この様な事情に鑑みて発明したものである。
【０００６】
【課題を解決するための手段】
本発明の組み合わせ式やまば歯車の組立方法及び組立装置並びに位相測定方法及び測定装置のうち、請求項１に係る組み合わせ式やまば歯車の組立方法は、互いに傾斜方向が逆で、且つ、ピッチ、傾斜角度並びに径に関する寸法が互いに等しい１対のはすば歯車を互いに同心に結合固定して成る組み合わせ式やまば歯車の組立方法に関する。
この様な請求項１に係る組み合わせ式やまば歯車の組立方法は、先ず、上記１対のはすば歯車を互いに同心に配置すると共に、これら両はすば歯車の外周縁に形成した複数の歯のうちの円周方向に隣り合う歯同士の間でこれら両はすば歯車の軸方向反対側端面から等距離位置部分に、形状及び大きさが互いに同一であって、上記両はすば歯車の中心軸に関する位相が所望の関係に規制された第一、第二両位置決め片をがたつきなく係合させる事により、上記両はすば歯車同士の円周方向に関する位相を上記所望の関係に規制する。その後、上記第一、第二両位置決め片と上記両はすば歯車の歯とを係合させた状態のままこれら両はすば歯車同士を互いに近付けて、互いに結合固定する。
【０００７】
又、請求項３に係る組み合わせ式やまば歯車の組立装置は、互いに傾斜方向が逆で、且つ、ピッチ、傾斜角度並びに径に関する寸法が互いに等しい１対のはすば歯車を互いに同心に結合固定して成る組み合わせ式やまば歯車を組み立てる為の組立装置に関する。
この様な請求項３に係る組み合わせ式やまば歯車の組立装置は、第一、第二両支持板と、第一、第二両支持凸部と、第一支持ブロックと、第一プランジャと、第一位置決め片と、第二支持ブロックと、第二プランジャと、第二位置決め片とを備える。
このうちの第一、第二両支持板は、互いに平行に且つ遠近動自在に設置されている。
又、上記第一、第二両支持凸部は、これら両支持板の互いに対向する部分に互いに同心に設けられ、それぞれの周囲に上記各はすば歯車をがたつきなく支持自在である。
又、上記第一支持ブロックは、上記第一支持板のうちで上記第二支持板と対向する片面に支持固定されている。
又、上記第一プランジャは、上記第一支持ブロックに、上記第一支持凸部の直径方向の変位自在に、先端部をこの第一支持凸部の側に向けた状態で支持されている。
又、上記第一位置決め片は、上記第一プランジャの先端部に設置されている。又、上記第二支持ブロックは、上記第二支持板のうちで上記第一支持板と対向する片面に支持固定されている。
又、上記第二プランジャは、上記第二支持ブロックに、上記第二支持凸部の直径方向の変位自在に、先端部をこの第二支持凸部の側に向けた状態で支持されている。
又、上記第二位置決め片は、上記第二プランジャの先端部に設置されており、上記第一位置決め片と形状及び大きさが同じである。
そして、上記第一、第二両プランジャの先端側への変位に伴って第一、第二両位置決め片を、前記両はすば歯車の歯の軸方向反対側端面からの距離が既知である部分に係合自在としている。
【０００８】
又、請求項５に係る組み合わせ式やまば歯車の位相測定方法は、互いに傾斜方向が逆で、且つ、ピッチ、傾斜角度並びに径に関する寸法が互いに等しい１対のはすば歯車を互いに同心に結合固定して成る組み合わせ式やまば歯車を構成する、これら両はすば歯車の歯の円周方向に関する位相を測定する方法である。
この様な請求項５に係る組み合わせ式やまば歯車の位相測定方法は、上記両はすば歯車を互いに同心に配置すると共に、これら両はすば歯車の外周縁に形成した複数の歯のうちの円周方向に隣り合う歯同士の間でこれら両はすば歯車の軸方向反対側端面からの距離が既知である部分に、形状及び大きさが互いに同一である第一、第二両位置決め片をがたつきなく係合させる状態と、円周方向に関するこれら第一、第二両位置決め片の位相を一致させる状態とを実現する。次いで、両状態の間でのこれら第一、第二両位置決め片の円周方向に関する変位量に基づいて、上記両はすば歯車の歯の円周方向に関する位相を測定する。
【０００９】
更に、請求項７に係る組み合わせ式やまば歯車の位相測定装置は、互いに傾斜方向が逆で、且つ、ピッチ、傾斜角度並びに径に関する寸法が互いに等しい１対のはすば歯車を互いに同心に結合固定して成る組み合わせ式やまば歯車を構成する、これら両はすば歯車の歯の円周方向に関する位相を測定する装置である。
この様な請求項７に係る組み合わせ式やまば歯車の位相測定装置は、第一支持板と、支持軸と、第二支持板と、第一支持ブロックと、第一プランジャと、第一位置決め片と、第二支持ブロックと、第二プランジャと、第二位置決め片と、測定器とを備える。
このうちの支持軸は、上記第一支持板の片面にその基端部を、この第一支持板に対し直角に支持され、その中間部周囲に上記組み合わせ式やまば歯車をがたつきなく外嵌自在である。
又、上記第二支持板は、上記第一支持板に対し平行に配置された状態でこの支持軸の先端部に着脱自在に、且つ、この支持軸を中心とする回転自在に設けられている。
又、上記第一支持ブロックは、上記第一支持板のうちで上記第二支持板と対向する片面に支持固定されている。
又、上記第一プランジャは、上記第一支持ブロックに、上記支持軸の直径方向の変位自在に、先端部をこの支持軸の側に向けた状態で支持されている。
又、上記第一位置決め片は、上記第一プランジャの先端部に設置されている。
又、上記第二支持ブロックは、上記第二支持板のうちで上記第一支持板と対向する片面に支持固定されている。
又、上記第二プランジャは、上記第二支持ブロックに、上記支持軸の直径方向の変位自在に、先端部をこの支持軸の側に向けた状態で支持されている。
又、上記第二位置決め片は、上記第二プランジャの先端部に設置されたもので、上記第一位置決め片と形状及び大きさが同じである。
更に、上記測定器は、上記第一支持板に対する上記第二支持板の変位量を測定する為のものである。
そして、上記第一、第二両プランジャの先端側への変位に伴って第一、第二両位置決め片を、上記両はすば歯車の歯の軸方向反対側端面からの距離が既知である部分に係合自在としている。
【００１０】
【作用】
前述の様な、請求項１、３に係る組み合わせ式やまば歯車の組立方法及び組立装置によれば、第一、第二両位置決め片と両はすば歯車の歯とを係合させた状態のままこれら両はすば歯車同士を互いに近付けて互いに結合固定する事で、これら両はすば歯車同士を、適正な位相関係で組み合わせる事ができる。
又、請求項５、７に係る組み合わせ式やまば歯車の位相測定方法及び測定装置によれば、第一、第二両位置決め片と両はすば歯車の歯とをがたつきなく係合させる状態と、円周方向に関するこれら第一、第二両位置決め片の位相を一致させる状態との間でのこれら第一、第二両位置決め片の円周方向に関する変位量に基づいて、上記両はすば歯車の歯の円周方向に関する位相を測定できる。
【００１１】
【発明の実施の形態】
図１〜４は、請求項１〜４に対応する、本発明の組み合わせ式やまば歯車の組立装置の実施の形態の１例を示している。この組み合わせ式やまば歯車の組立装置１は、図１に示す様な１対のはすば歯車２ａ、２ｂを、図３〜４に示す様に互いに結合固定して、組み合わせ式やまば歯車３とする場合に、上記両はすば歯車２ａ、２ｂの円周方向に関する位相を適正に規制するものである。これら両はすば歯車２ａ、２ｂは、傾斜方向が逆で、且つ、ピッチ、歯の傾斜角度並びに径に関する寸法（ピッチ円、歯先円、歯底円の直径）が互いに等しい。又、上記両はすば歯車２ａ、２ｂの中心部に設けたボス部４ａ、４ｂの軸方向端面で互いに対向する部分には、互いにがたつきなく嵌合する環状凹部５と環状凸部６とを、それぞれのはすば歯車２ａ、２ｂと同心に形成している。
【００１２】
上述の様な両はすば歯車２ａ、２ｂを、位相を適正に規制した状態で組み合わせて、上記組み合わせ式やまば歯車３とする、組み合わせ式やまば歯車の組立装置１は、第一、第二両支持板７、８と、第一、第二両支持凸部９、１０と、第一支持ブロック１１と、第一プランジャ１２と、第一位置決め片１３と、第二支持ブロック１４と、第二プランジャ１５と、第二位置決め片１６とを備える。
【００１３】
このうちの第一、第二両支持板７、８は、互いに平行に且つ遠近動自在に設置されている。この為に図示の例では、下側に位置する第一支持板７の上面四隅部にガイドロッド１７、１７を鉛直方向に植設し、これら各ガイドロッド１７、１７の上端部を、上記第二支持板８の四隅部に形成したガイド孔１８、１８内に、スリーブ１９、１９を介して、軸方向の移動（昇降）自在に挿入している。上記各ガイドロッド１７、１７の周囲には、図示しない圧縮コイルばねを配置し、上記第二支持板８に、上向きの弾力を付与している。従ってこの第二支持板８は、図示しないプレス装置のラム等により下方に押圧された場合にのみ、上記各圧縮コイルばねの弾力に抗して下降する（上記第一支持板７に近付く）。
【００１４】
又、上記第一、第二両支持凸部９、１０は、上記第一、第二両支持板７、８の互いに対向する部分に互いに同心に設けられ、それぞれの周囲に上記各はすば歯車２ａ、２ｂをがたつきなく支持自在である。このうちの第一支持凸部９は、上記第一支持板７の上面中央部に、その中心軸を上記各ガイドロッド１７、１７の中心軸と平行にした状態で（中心軸を鉛直方向に向けた状態で）固定している。これに対して上記第二支持凸部１０は、上記第二支持板８の中央部に、この第二支持板８の下面からの出入自在に設けている。
【００１５】
この為に図示の例では、上記第二支持板８の上面中央部に昇降機構２０を、その出力ロッド２１を上記各ガイドロッド１７、１７の中心軸と平行にした状態で（中心軸を鉛直方向に向けた状態で）設置している。そして、上記出力ロッド２１の下端部に、上記第二支持凸部１０を構成する弾性スリーブ２２を支持している。この弾性スリーブ２２は、軸方向両端縁から軸方向に向け複数の切り込みを、両端縁同士の間で位相を半分ずつずらせた状態で形成する事により、外径を弾性的に収縮自在としたものである。この様な弾性スリーブ２２は、上記出力ロッド２１により下降させられた状態で、その下半部が、図１、３に示す様に、上記第二支持板８の下面から突出する。そしてこの状態で、その外径を弾性的に縮めた状態で、前記１対のはすば歯車２ａ、２ｂのうち、組み合わせ作業時に上側に存在するはすば歯車２ｂのボス部４ｂ内に押し込み自在である。
【００１６】
又、前記第一支持ブロック１１は、前記第一支持板７のうちで上記第二支持板８と対向する片面、即ち、上面に支持固定されている。そして、上記第一支持ブロック１１に前記第一プランジャ１２を、前記第一支持凸部９の直径方向の変位自在に、先端部をこの第一支持凸部９の側に向けた状態で支持している。この為に本例の場合には、上記第一支持ブロック１１に第一支持孔２３を、上記第一支持凸部９の直径方向に亙って形成している。この第一支持孔２３は、この第一支持凸部９寄りの小径部と反対寄りの大径部とを段部により連続させた貫通孔である。又、上記第一プランジャ１２の中間部には、上記小径部に進入不能で上記大径部に摺動自在に係合する鍔部を設けている。更に上記第一プランジャ１２の尾部（図１〜３の右端部）は、上記第一支持ブロック１１の外端面にねじ止め固定した第一抑え板２４に形成した通孔を、摺動自在に挿通している。又、この第一抑え板２４と上記鍔部との間に圧縮コイルばねを設けて上記第一プランジャ１２に、上記第一支持凸部９に近付く方向の弾力を付与している。この第一プランジャ１２は、上記第一抑え板２４から突出した尾部を引っ張る事により上記第一支持凸部９から離れる方向に変位させられるが、この尾部を引っ張る力を解除すれば、上記圧縮コイルばねの弾力により、上記第一支持凸部９に近付く方向に変位する。
【００１７】
この様な第一プランジャ１２の先端に、前記第一位置決め片１３を設置している。この第一位置決め片１３としては、例えば玉軸受用の鋼球（ボール）を使用する。この場合には、この鋼球の中心を、上記第一プランジャ１２の中心軸上に位置させる。或は、上記第一プランジャ１２の先端面を半球状に形成して、この第一プランジャ１２の先端部自体を、上記第一位置決め片１３とする事もできる。この場合には、半球形状の曲率中心を、上記第一プランジャ１２の中心軸上に位置させる。そして、上記圧縮ばねの弾力に基づく上記第一プランジャ１２の先端側への変位に伴って、上記第一位置決め片１３を、前記第一支持板７の上面に支持したはすば歯車２ａの外周縁部に係合自在としている。尚、係合時に上記第一位置決め片１３が、このはすば歯車２ａの外周縁部に形成した多数の歯のうちで、円周方向に隣り合う歯の円周方向側面同士の間に掛け渡される様に、上記第一位置決め片１３の曲率半径を規制している。言い換えれば、この位置決め片１３が、歯先の端縁や歯底に突き当たらず、各歯の円周方向側面に突き当たる様にしている。
【００１８】
一方、前記第二支持ブロック１４は、前記第二支持板８のうちで前記第一支持板７と対向する片面、即ち下面に支持固定されている。そして、上記第二支持ブロック１４に前記第二プランジャ１５を、前記第二支持凸部１０（及び前記第一支持凸部９）の直径方向の変位自在に、先端部をこの第二支持凸部１０の側に向けた状態で支持している。この為に本例の場合には、上記第二支持ブロック１４に第二支持孔２５を、上記第二支持凸部１０の直径方向に亙って形成している。この第二支持孔２５は、この第二支持凸部１０寄りの小径部と反対寄りの大径部とを段部により連続させた貫通孔である。又、上記第二プランジャ１５の中間部には、上記小径部に進入不能で上記大径部に摺動自在に係合する鍔部を設けている。更に上記第二プランジャ１５の尾部（図１、３の右端部）は、上記第二支持ブロック１４の外端面にねじ止め固定した第二抑え板２６に形成した通孔を、摺動自在に挿通している。又、この第二抑え板２６と上記鍔部との間に圧縮コイルばねを設けて上記第二プランジャ１５に、上記第二支持凸部１０に近付く方向の弾力を付与している。この第二プランジャ１５は、上記第二抑え板２６から突出した尾部を引っ張る事により上記第二支持凸部１０から離れる方向に変位させられるが、この尾部を引っ張る力を解除すれば、上記圧縮コイルばねの弾力により、上記第二支持凸部１０に近付く方向に変位する。
【００１９】
この様な第二プランジャ１５の先端に、前記第二位置決め片１６を設置している。この第二位置決め片１６としても、前述した第一位置決め片１３と同様に、玉軸受用の鋼球（ボール）を使用したり、或は、上記第二プランジャ１５の先端面を半球状に形成する。鋼球の中心、或は上記半球形状の曲率中心を、上記第二プランジャ１５の中心軸上に位置させる事も、上記第一位置決め片１３の場合と同様である。又、上記第二位置決め片１６は、この第一位置決め片１３と、形状及び大きさが同じである。そして、上記圧縮ばねの弾力に基づく上記第二プランジャ１５の先端側への変位に伴って、上記第二位置決め片１６を、前記第二支持板８の下面に支持したはすば歯車２ｂの外周縁部に係合自在としている。尚、係合時に上記第二位置決め片１６が、このはすば歯車２ｂの外周縁部に形成した多数の歯のうちで、円周方向に隣り合う歯の円周方向側面同士の間に掛け渡される様に、上記第二位置決め片１６の曲率半径を規制している。
【００２０】
前記第一プランジャ１２と上記第二プランジャ１５とは、図２に示す様に、円周方向に関して角度θだけずらせた状態で設けている。この角度θは、前記１対のはすば歯車２ａ、２ｂの外周縁部に形成した歯の位相をずらせるべき角度αに応じて規制する。これら両はすば歯車２ａ、２ｂの外周縁部に形成した歯の中心角ピッチをβとし、ｋを自然数とすれば、θ＝α＋ｋ・βとなる。上記両はすば歯車２ａ、２ｂの位相を一致させる場合には、θ＝ｋ・βとする。尚、前記第一、第二支持板７、８同士を近付けた場合に、前記第一、第二両支持ブロック１１、１４同士が干渉する可能性がなければ、上記各式で、ｋ＝０としても良い。
【００２１】
又、前述の様に第一支持板７の上面に支持したはすば歯車２ａの外周縁部と前記第一位置決め片１３との軸方向に関する係合位置と、前記第二支持板８の下面に支持したはすば歯車２ｂの外周縁部と上記第二位置決め片１６との軸方向に関する係合位置とは、互いに同じとなる様にしている。本例の場合、上記第一、第二両位置決め片１３、１６と上記１対のはすば歯車２ａ、２ｂの外周縁部に形成した歯の側面とが係合する位置を、これら両はすば歯車２ａ、２ｂの歯の軸方向反対側端面から等距離位置としている。尚、この前提条件として、上記両はすば歯車２ａ、２ｂの中心部に設けた前記各ボス部４ａ、４ｂの軸方向端面を、上記第一支持板７の上面或は上記第二支持板８の下面に突き当てる。この点に就いて、図１を参照しつつ説明する。
【００２２】
図示の場合、上記下側のはすば歯車２ａの外周縁部に形成した歯と上記第一位置決め片１３との係合部（歯の側面と第一位置決め片１３との接触点）が、上記歯の下端縁からＬ_1a、上端縁からＬ_1bの距離に存在する。又、上記上側のはすば歯車２ｂの外周縁部に形成した歯と上記第二位置決め片１６との係合部が、上記歯の上端縁からＬ_2a、下端縁からＬ_2bの距離に存在する。本例の場合、Ｌ_1a＝Ｌ_2a、Ｌ_1b＝Ｌ_2bとしている。尚、上記両はすば歯車２ａ、２ｂの外周縁に形成した歯の幅をそれぞれＷ₁ 、Ｗ₂ とした場合、Ｗ₁ ＝Ｌ_1a＋Ｌ_1b＝Ｌ_2a＋Ｌ_2b＝Ｗ₂ である。上記各式で表した状態に、上記第一、第二両位置決め片１３、１６と上記１対のはすば歯車２ａ、２ｂの外周縁部に形成した歯の側面とが係合する位置を規制する為には、前記第一、第二プランジャ１２、１５の中心と、上記第一支持板７の上面又は上記第二支持板８の下面との距離を、上記両はすば歯車２ａ、２ｂの外周縁に形成した歯とこれら第一、第二両支持板７、８との距離との関係で適正に規制する。
【００２３】
但し、上記第一、第二両位置決め片１３、１６と上記両はすば歯車２ａ、２ｂの外周縁部との係合位置の歯の軸方向反対側端面からの距離が既知であれば、第一、第二両位置決め片１３、１６と１対のはすば歯車２ａ、２ｂの外周縁部に形成した歯とが係合する位置が、これら両はすば歯車２ａ、２ｂの歯の軸方向反対側端面から等距離位置に存在しなくても、上記両はすば歯車２ａ、２ｂ同士の位相を算出できる。従って、Ｌ_1a≠Ｌ_2a、Ｌ_1b≠Ｌ_2bとしても、本発明は実施可能である。
【００２４】
上述の様に構成する組立装置１を使用して、上記１対のはすば歯車２ａ、２ｂを所定の位相で組み合わせ、組み合わせ式やまば歯車３とする作業は、次の様にして行なう。先ず、上記第一、第二両支持板７、８同士を、図１に示す様に互いに離隔させた状態で、第一の支持板７の上面に設けた第一支持凸部９に上記はすば歯車２ａを、第二の支持板８の下面から突出させた第二支持凸部１０に上記はすば歯車２ｂを、それぞれがたつきなく外嵌する。この際、このはすば歯車２ｂの中心部に設けたボス部４ｂの上端面を、上記第二支持板８の下面に突き当てる。この状態で上記第二支持凸部１０は、弾性的に縮径して、上記はすば歯車２ｂが落下しない様に保持する。上記はすば歯車２ａの中心部に設けたボス部４ａの下端面が重力により上記第一支持板７の上面に突き当たる事は勿論である。この状態で、上記１対のはすば歯車２ａ、２ｂは、互いに同心に支持される。又、上記両ボス部４ａ、４ｂの端部に形成し、前記環状凹部５と環状凸部６とは、互いに対向させる。
【００２５】
この様に上記両はすば歯車２ａ、２ｂを互いに同心に支持した状態で、これら両はすば歯車２ａ、２ｂの外周縁部に形成した歯に、前記第一、第二両プランジャ１２、１５の先端部に設けた第一、第二位置決め片１３、１６を係合させる。この係合作業時には、先ず、上記第一、第二両プランジャ１２、１５を圧縮ばねの弾力に抗して上記両はすば歯車２ａ、２ｂの径方向外方に退避させる。そして、この状態で、上記第一、第二両プランジャ１２、１５の中心軸の延長線上に、上記両はすば歯車２ａ、２ｂの外周縁部で円周方向に隣り合う歯同士の間部分を位置させる。その後、上記第一、第二両プランジャ１２、１５の先端部に設けた、上記第一、第二両位置決め片１３、１６を、上記圧縮ばねの弾力に基づいて、上記円周方向に隣り合う歯同士の間部分に進入させる。この作業により、上記両はすば歯車２ａ、２ｂの中心軸に関する位相が所望の関係に規制される。
【００２６】
次いで、上記第一、第二両位置決め片１３、１６と上記両はすば歯車２ａ、２ｂの歯とを係合させた状態のまま、これら両はすば歯車２ａ、２ｂ同士を互いに近付けて、図３に示す様に互いに結合固定する。この結合固定時には、前記第二支持板８を、図示しないプレス装置のラムにより、前記各ガイドロッド１７、１７の周囲に配置した、図示しない圧縮コイルばねの弾力に抗して下降させる。この下降時に、上記第二プランジャ１５は、上記第二支持板８と共に下降するので、上記両はすば歯車２ａ、２ｂの位相は、上記規制された状態のままに維持される。そして、上記第二支持板８の下降に伴って、前記両ボス部４ａ、４ｂの端部に形成した前記環状凹部５と環状凸部６とが、締り嵌めにより嵌合する。この状態で上記両はすば歯車２ａ、２ｂ同士が、円周方向に関する位相が適正に規制された状態のまま結合される。
【００２７】
この様にして上記両はすば歯車２ａ、２ｂ同士を結合したならば、先ず、前記昇降機構２０により、それまで下降していた、前記第二支持凸部１０である前記弾性スリーブ２２を上昇させ、この弾性スリーブ２２を、上記はすば歯車２ｂの中心部に形成したボス部４ｂの内側から抜き取る。次いで、上記ラムにより上記第二支持板８を押圧していた力を解除し、この第二支持板８を、上記図示しない圧縮コイルばねの弾力により、上昇させる。この状態で、上記環状凹部５と環状凸部６との嵌合に基づいて上記両はすば歯車２ａ、２ｂを結合して成る、前記組み合わせ式やまば歯車３を取り出す。
【００２８】
図４は、この様にして得られた組み合わせ式やまば歯車３を示している。本例の場合には、上記環状凹部５と環状凸部６とを、十分に大きな締り嵌めで嵌合させている為、そのまま組み合わせ式やまば歯車３として使用可能である。これに対して、用途によっては、上記環状凹部５と環状凸部６との嵌合のみでは、上記両はすば歯車２ａ、２ｂ同士の結合力が不十分である場合も考えられる。そこで、この様な場合には、上記環状凹部５と環状凸部６とを嵌合させて成る上記組み合わせ式やまば歯車３を取り出した後、この組み合わせ式やまば歯車３に、図５〜８に示す様な構造を組み付ける事もできる。
【００２９】
先ず、図５に示した第１例の構造は、１対のはすば歯車２ａ、２ｂ同士の間にノックピン２７を掛け渡したものである。このノックピン２７を嵌合させる為の円孔は、上記環状凹部５と環状凸部６とを嵌合させて上記組み合わせ式やまば歯車３を構成した後に形成する。尚、上記ノックピン２７を円周方向に関して複数本設け、且つ、上記両はすば歯車２ａ、２ｂ同士の間に上記ノックピン２７を掛け渡すまでの間、これら両はすば歯車２ａ、２ｂ同士の位置関係を規制できるのであれば、上記環状凹部５と環状凸部６とを省略する事もできる。又、これら環状凹部５と環状凸部６とを設ける場合でも、単なる心合わせの為の印籠嵌合とする事もできる。
【００３０】
次に、図６に示した第２例の構造は、１対のはすば歯車２ａ、２ｂ同士を複数本のボルト２８、２８とナット２９とにより結合したものである。これら各ボルト２８、２８を挿通する為の円孔は、上記環状凹部５と環状凸部６とを嵌合させて上記組み合わせ式やまば歯車３を構成した後に形成する。本例の場合も、上記各ボルト２８、２８とナット２９とにより上記両はすば歯車２ａ、２ｂ同士を結合するまでの間、これら両はすば歯車２ａ、２ｂ同士の位置関係を規制できるのであれば、上記環状凹部５と環状凸部６とを省略する事もできる。又、これら環状凹部５と環状凸部６とを設ける場合でも、単なる心合わせの為の印籠嵌合とする事もできる。
【００３１】
次に、図７に示した第３例の構造の場合には、１対のはすば歯車２ａ´、２ｂ´同士の間に、短円筒状の結合スリーブ３０を掛け渡したものである。この結合スリーブ３０は、上記両はすば歯車２ａ´、２ｂ´同士を位相を合わせた状態で互いに近付けるのと同時に、これら両はすば歯車２ａ´、２ｂ´の互いに対向する部分に形成した環状凹部５、５に締り嵌めで内嵌し、これら両はすば歯車２ａ´、２ｂ´同士の間に掛け渡す。
【００３２】
更に、図８に示した第４例の構造の場合には、１対のはすば歯車２ａ、２ｂ同士の間に、円筒状のスプラインスリーブ３１を掛け渡し、これら両はすば歯車２ａ、２ｂの内周面に係止した止め輪３２、３２により、このスプラインスリーブ３１の抜け止めを図ったものである。このスプラインスリーブ３１の外周面に形成した雄スプライン溝を係合させる為、上記両はすば歯車２ａ、２ｂの内周面に設ける雌スプライン溝は、これら両はすば歯車２ａ、２ｂの位相を合わせた後に形成する。この様な本例の場合も、上記スプラインスリーブ３１を掛け渡す（或は雌スプライン溝を形成する）までの間、上記両はすば歯車２ａ、２ｂ同士の位置関係を規制できるのであれば、環状凹部５と環状凸部６とを省略する事もできる。又、これら環状凹部５と環状凸部６とを設ける場合でも、単なる心合わせの為の印籠嵌合とする事もできる。
【００３３】
次に、図９〜１２は、請求項５〜８に対応する、本発明の組み合わせ式やまば歯車の位相測定装置の実施の形態の１例を示している。この位相測定装置３３は、第一支持板７ａと、支持軸３４と、第二支持板８ａと、第一支持ブロック１１ａと、第一プランジャ１２ａと、第一位置決め片１３ａと、第二支持ブロック１４ａと、第二プランジャ１５ａと、第二位置決め片１６ａと、測定器３５とを備える。
【００３４】
このうちの支持軸３４は、上記第一支持板７ａの片面である上面に、その基端部である下端部を、この第一支持板７ａに対し直角に、即ち中心軸を鉛直方向に配置した状態で支持固定している。この様な支持軸３４は、図１１に示す様にその中間部周囲に、１対のはすば歯車２ａ、２ｂを結合固定して成る組み合わせ式やまば歯車３を、がたつきなく外嵌自在である。
【００３５】
又、上記第二支持板８ａは、上記第一支持板７ａに対し平行に配置された状態で上記支持軸３４の先端部である上端部に、着脱自在に、且つ、この支持軸３４を中心とする回転自在に設けられている。この為に本例の場合には、上記第二支持板８ａの中央部でこの第二支持板８ａの中央部に形成した通孔３６の周囲部分を、上下１対のスラスト軸受３７、３７により挟持している。測定作業時にこれら両スラスト軸受３７、３７と上記第二支持板８ａの中央部とを、上記支持軸３４に外嵌したスリーブ３８（図９）或は上記組み合わせ式やまば歯車３の中心部に設けたボス部４ｂ（図１１）の上端面と、上記支持軸３４の上端部に螺着したナット３９の下面との間で挟持する。
【００３６】
又、前記第一支持ブロック１１ａは、上記第一支持板７ａのうちで上記第二支持板８ａと対向する片面である上面に支持固定されている。又、前記第一プランジャ１２ａは、上記第一支持ブロック１１ａに、上記支持軸３４の直径方向の変位自在に、先端部をこの支持軸３４の側に向けた状態で支持されている。又、前記第一位置決め片１３ａは、上記第一プランジャ１２ａの先端部に設置されている。尚、これら第一支持ブロック１１ａ、第一プランジャ１２ａ、第一位置決め片１３ａの構成及び機能に関しては、前述の図１〜３に示した組立装置１を構成する第一支持ブロック１１、第一プランジャ１２、第一位置決め片１３の構成及び機能と同じであるから、同等部分には同一符号を付して、重複する説明は省略する。
【００３７】
又、上記第二支持ブロック１４ａは、上記第二支持板８ａのうちで上記第一支持板７ａと対向する片面である下面に支持固定されている。又、前記第二プランジャ１５ａは、上記第二支持ブロック１４ａに、上記支持軸３４の直径方向の変位自在に、先端部をこの支持軸３４の側に向けた状態で支持されている。又、前記第二位置決め片１６ａは、上記第二プランジャ１５ａの先端部に設置されたもので、上記第一位置決め片１３ａと形状及び大きさが同じである。これら第二支持ブロック１４ａ、第二プランジャ１５ａ、第二位置決め片１６ａの構成及び機能に関しても、前述の図１〜３に示した組立装置１を構成する第二支持ブロック１４、第二プランジャ１５、第二位置決め片１６の構成及び機能と同じであるから、同等部分には同一符号を付して、重複する説明は省略する。
【００３８】
但し、本例の位相測定装置３３を構成する第一、第二支持ブロック１１ａ、１４ａの場合には、上記組立装置１を構成する第一、第二支持ブロック１１、１４とは異なり、円周方向に関する位相がほぼ一致する部分に設けている。より具体的には、上記支持軸３４に対して上記第二支持板８ａを回転させ、この第二支持板８ａの長さ方向と前記第一支持板７ａの長さ方向とを一致させた状態で、上記第一、第二両プランジャ１２ａ、１５ａ同士が互いに平行になる様に、上記第一、第二両支持ブロック１１ａ、１４ａの設置位置並びに設置方向を規制している。
【００３９】
そして、上記第一プランジャ１２ａ及び上記第二プランジャ１５ａの先端側への変位に伴って、前記第一位置決め片１３ａと上記第二位置決め片１６ａとを、前記両はすば歯車２ａ、２ｂの外周縁部に形成した歯の軸方向反対側端面から等距離位置部分に係合自在としている。この為に図示の例では、上記両位置決め片１３ａ、１６ａを、上記両はすば歯車２ａ、２ｂの外周縁部に形成した歯の幅方向中央位置に突き当て自在としている。
【００４０】
更に、前記測定器３５は、上記第一支持板７ａに対する上記第二支持板８ａの変位量を測定する為のもので、図示の例ではマイクロメータヘッドを使用している。即ち、上記第一支持板７ａの上面に上記測定器３５を、支持ブラケット４０により支持すると共に、この測定器３５の測定端子４１を、上記第二支持板８ａの下面に固定した衝合片４２に突き当てている。この構成により、前記支持軸３４を中心とする上記第二支持板８ａの回転角度を、上記衝合片４２の変位量として測定自在としている。
【００４１】
上述の様に構成する位相測定装置３３を使用して、前記組み合わせ式やまば歯車３を構成する上記１対のはすば歯車２ａ、２ｂの位相を測定する作業は、次の様にして行なう。先ず、上記測定器３５の初期設定作業を行なう。この初期設定作業は、図９〜１０に示す様にして、円周方向に関する上記第一、第二両位置決め片１３ａ、１６ａの位相を一致させる。即ち、上記第一支持板７ａの上面に１対のＬ字ブロック４３、４３を、それぞれの平坦面を直角方向に位置させた状態で配置し、これら両平坦面同士の交差部分に、上記第一、第二両位置決め片１３ａ、１６ａを突き当てる。この状態ではこれら第一、第二両位置決め片１３ａ、１６ａの円周方向に関する位相が一致するので、この状態での上記測定器３５の指示値を、初期値（零点）とする。この際、上記支持軸３４には、前記スリーブ３８を外嵌して、上記第二支持板８ａを支える。
【００４２】
次いで、図１１〜１２に示す様に、上記１対のはすば歯車２ａ、２ｂを組み合わせて成る組み合わせ式やまば歯車３を、上記支持軸３４に外嵌する。この状態では上記第二支持板８ａを、この組み合わせ式やまば歯車３の中心部に設けたボス部４ａ、４ｂが支承する。そこで、この状態で、前記第一、第二両プランジャ１２ａ、１５ａの先端部に設けた、前記第一、第二両位置決め片１３ａ、１６ａを、上記両はすば歯車２ａ、２ｂの外周縁部に形成した歯のうちで円周方向に隣り合う歯同士の間部分に進入させる。この際、上記第二支持板８ａを上記支持軸３４を中心として回転させる事により、第一、第二両位置決め片１３ａ、１６ａを上記両はすば歯車２ａ、２ｂの外周縁部に形成した歯に、それぞれがたつきなく係合させる。
【００４３】
そして、図９〜１０に示す様に上記第一、第二両位置決め片１３ａ、１６ａの円周方向に関する位相を一致させた状態と、これら両位置決め片１３ａ、１６ａの位相を上記両はすば歯車２ａ、２ｂ同士の位相に合わせた状態との間で、上記第二支持板８ａの回転角度を測定する。本例の場合、この回転角度は、前記測定器３５が測定する、前記衝合片４２の変位量として、次の様にして求められる。
【００４４】
上記支持軸３４の中心と、上記測定器３５の測定端と上記衝合片４２との当接位置との距離をＲとし、上記２種類の状態でのこの衝合片の変位量をＬとする。この場合に、上記回転角度θ（上記両はすば歯車２ａ、２ｂ同士の位相差）が微小であれば、 sinθ≒θであるから、この回転角度θを、θ＝Ｌ／Ｒで求める。これに対して、上記回転角度が大きく、 sinθ≒θが成り立たない場合には、図１３から明らかな通り、上記回転角度θを、θ＝ sin^-1（Ｌ／Ｒ）で求める。
【００４５】
尚、図示の例では、それぞれが変速機等の他の部品と独立して形成された、１対のはすば歯車を所定の位相に組み合わせたり、或は組み合わされた１対のはすば歯車同士の位相を測定する場合に就いて示した。但し、本発明は、この様な他の部品と独立した１対のはすば歯車に関して実施する場合に限らず、はすば歯車を一体に形成した１対の部品を所定の位相に組み合わせたり、或は組み合わされた１対の部品に直接形成したはすば歯車同士の位相を測定する場合にも適用できる。例えば、自動車用の自動変速機の変速ユニットとして使用される、ダブルキャビティ型のトロイダル型無段変速機を構成する１対の出力側ディスクの外周縁部に、互いに傾斜方向が逆であるはすば歯車を直接形成する事が考えられている。この様な場合に、上記１対の出力側ディスクを所定の位相に組み合わせたり、或は組み合わされた１対の出力側ディスク同士の位相を測定する為に、本発明を使用する事ができる。この場合、これら両出力側ディスクが、各請求項に記載したはすば歯車に相当する事は明らかである。勿論、独立したはすば歯車と、他の部品と一体に設けられたはすば歯車との結合に関して実施する事もできる。
【００４６】
【発明の効果】
本発明の組み合わせ式やまば歯車の組立方法及び組立装置並びに位相測定方法及び測定装置は以上に述べた通り構成され作用する為、回転伝達時にスラスト力を発生しない、高精度の組み合わせ式やまば歯車を実現できる。そして、組み合わせ式やまば歯車を組み込んだ、自動車用変速機や各種産業機械の性能向上に寄与できる。
【図面の簡単な説明】
【図１】本発明の組み合わせ式やまば歯車の組立装置の実施の形態の１例を、はすば歯車同士を結合する以前の状態で示す縦断面図。
【図２】一部を省略して示す平面図。
【図３】はすば歯車同士を結合した状態で示す縦断面図。
【図４】はすば歯車同士を結合固定する構造の第１例を示す断面図。
【図５】同じく第２例を示す平面図及び断面図。
【図６】同じく第３例を示す平面図及び断面図。
【図７】同じく第４例を示す断面図。
【図８】同じく第５例を示す断面図。
【図９】本発明の組み合わせ式やまば歯車の位相測定装置の実施の形態の１例を、第一、第二両位置決め片の位相を一致させた状態で示す縦断面図。
【図１０】一部を省略して図９の上方から見た平面図。
【図１１】組み合わせ式やまば歯車を構成する１対のはすば歯車に合わせて第一、第二両位置決め片の位相をずらせた状態で示す縦断面図。
【図１２】一部を省略して図１１の上方から見た平面図。
【図１３】第二支持板の変位量から位相のずれ角度を求める場合を示す模式図。
【符号の説明】
１組立装置
２ａ、２ｂ、２ａ′、２ｂ′ はすば歯車
３組み合わせ式やまば歯車
４ａ、４ｂボス部
５環状凹部
６環状凸部
７、７ａ第一支持板
８、８ａ第二支持板
９第一支持凸部
１０第二支持凸部
１１、１１ａ第一支持ブロック
１２、１２ａ第一プランジャ
１３、１３ａ第一位置決め片
１４、１４ａ第二支持ブロック
１５、１５ａ第二プランジャ
１６、１６ａ第二位置決め片
１７ガイドロッド
１８ガイド孔
１９スリーブ
２０昇降機構
２１出力ロッド
２２弾性スリーブ
２３第一支持孔
２４第一抑え板
２５第二支持孔
２６第二抑え板
２７ノックピン
２８ボルト
２９ナット
３０結合スリーブ
３１スプラインスリーブ
３２止め輪
３３位相測定装置
３４支持軸
３５測定器
３６通孔
３７スラスト軸受
３８スリーブ
３９ナット
４０支持ブラケット
４１測定端子
４２衝合片
４３Ｌ字ブロック[0001]
BACKGROUND OF THE INVENTION
An assembly method and an assembly apparatus and a phase measurement method and a measurement apparatus for a combination type spur gear according to the present invention are a pair of parts constituting a combination type spur gear incorporated in a power transmission unit of an automobile transmission or various industrial machines. This is used to properly regulate the phase of the helical gear.
[0002]
[Prior art]
Each of the plurality of gears constituting the power transmission unit of the transmission for automobiles and various industrial machines is a helical gear. The reason for this is to reduce noise (meshing noise) generated at the meshing portions of these gears during power transmission. When each gear is a helical gear, a thrust force is generated at the meshing portion of each gear during the operation of the automobile transmission or various industrial machines. The thrust force generated at the meshing portion of the gears in this way presses the shaft or the like on which the gear is fixed in the axial direction. In the case of a transmission shaft or the like provided with gears at both ends, the thrust force can be offset by reversing the inclination directions of the pair of gears. However, with respect to a rotating member having only one gear in the middle part, the thrust force cannot be canceled out in this way. When such a thrust force is supported by the rolling bearing that supports the rotating member, the rotational resistance of the rolling bearing portion increases and the power transmission efficiency only deteriorates. In addition, the durability of the rolling bearing is also impaired.
[0003]
In view of such circumstances, Japanese Patent Application Laid-Open Nos. 8-159229, 9-89063, and the like describe inventions relating to a combination type spur gear. The combination type helical gear described in each of these publications is formed by concentrically connecting and fixing a pair of helical gears whose inclination directions are opposite to each other and whose pitch, inclination angle and diameter are equal to each other. . In the case of such a combination type helical gear, a thrust force having the same magnitude is generated in the opposite direction to the pair of helical gears as power is transmitted. For this reason, it is not necessary to support a large thrust force on the rolling bearing that rotates together with the combination type splint gear, and power transmission efficiency and durability of the rolling bearing can be improved. The above Japanese Patent Laid-Open No. 8-159229 also describes a technique for reducing the noise generated at the meshing portion by suppressing the variation of the meshing load by shifting the phase of the pair of helical gears. .
[0004]
[Problems to be solved by the invention]
In order to secure the transmission efficiency of the power transmission unit composed of the combination type or the spur gear as described above and to suppress the noise generated at the meshing part of the combination type or the spur gear, this combination type or the spur gear is configured. It is necessary to properly regulate the phase between a pair of helical gears. If this phase is shifted even a little, the meshing resistance of the meshing portion increases, and not only the transmission efficiency decreases, but also the noise generated during operation increases.
[0005]
On the other hand, it is troublesome to combine a pair of helical gears in a state where the phases of these helical gears are regulated as desired. In particular, in the case of a structure in which the phase of a pair of helical gears is shifted in order to suppress fluctuations in the meshing load, these both remain in a state where the phase shift between the helical gears is regulated to an appropriate value. It is difficult to combine these two helical gears with the conventional technology. For this reason, a method and apparatus for combining these helical gears with the phase in the circumferential direction properly regulated, and measuring whether the phase of a pair of helical gears combined with each other is appropriate. A method and apparatus is needed.
The assembling method and the assembling apparatus and the phase measuring method and the measuring apparatus for the combination-type helical gear according to the present invention have been invented in view of such circumstances.
[0006]
[Means for Solving the Problems]
Among the assembling method and assembling apparatus and the phase measuring method and measuring apparatus according to the present invention, the assembling method of the combining bevel gear according to claim 1 has an inclination direction opposite to each other and a pitch, The present invention relates to a method of assembling a combination type helical gear formed by connecting and fixing a pair of helical gears having the same inclination angle and diameter dimensions.
In the method of assembling the combination type helical gear according to claim 1, first, the pair of helical gears are arranged concentrically with each other, and both of these are formed on the outer peripheral edge of the helical gear. Among the teeth that are adjacent to each other in the circumferential direction, these two are identical in shape and size to the equidistant position from the axially opposite end face of the helical gear. By engaging the first and second positioning pieces whose phase with respect to the central axis of the gear are regulated in a desired relationship without rattling, the phase in the circumferential direction between the helical gears is set to the desired value. Regulate relationships. Thereafter, with the first and second positioning pieces and the teeth of the helical gears engaged with each other, the both helical gears are brought close to each other and fixed to each other.
[0007]
In addition, the combination type helical gear assembly device according to claim 3 couples and fixes a pair of helical gears concentrically with each other, the directions of inclination being opposite to each other and the dimensions regarding pitch, inclination angle and diameter being equal to each other. The present invention relates to an assembling apparatus for assembling a combination type splint gear.
Such claims 3 The assembly device of the combination type splint gear according to the first and second support plates, the first and second support projections, the first support block, the first plunger, and the first positioning piece, A second support block, a second plunger, and a second positioning piece are provided.
Of these, the first and second support plates are installed in parallel to each other and freely movable.
The first and second support protrusions are provided concentrically with each other on the portions of the support plates facing each other, and can freely support the helical gears around each of them.
The first support block is supported and fixed to one side of the first support plate facing the second support plate.
The first plunger is supported by the first support block in a state in which the distal end portion faces the first support convex portion so as to be displaceable in the diameter direction of the first support convex portion.
The first positioning piece is installed at the tip of the first plunger. The second support block is supported and fixed on one side of the second support plate facing the first support plate.
The second plunger is supported by the second support block in a state in which the distal end portion faces the second support convex portion so as to be displaceable in the diameter direction of the second support convex portion.
The second positioning piece is installed at the tip of the second plunger, and has the same shape and size as the first positioning piece.
The distance between the first and second positioning pieces from the axially opposite end surfaces of the helical gear teeth is known in accordance with the displacement of the first and second plungers toward the tip side. The part can be freely engaged.
[0008]
Further, the phase measurement method of the combination type helical gear according to claim 5 couples a pair of helical gears concentrically to each other whose inclination directions are opposite to each other and whose pitch, inclination angle and diameter are equal to each other. This is a method of measuring the phase of the helical gear teeth in the circumferential direction.
The phase measurement method of the combination type helical gear according to claim 5 is such that both the helical gears are arranged concentrically with each other, and both of the teeth are formed on the outer peripheral edge of the helical gear. The first and second positionings are identical in shape and size to each other between the teeth adjacent to each other in the circumferential direction of the helical gear, and the distance from the axially opposite end face of the helical gear is known. A state in which the pieces are engaged without rattling and a state in which the phases of the first and second positioning pieces in the circumferential direction are matched are realized. Next, based on the amount of displacement of the first and second positioning pieces in the circumferential direction between the two states, the phase of the helical gear teeth in the circumferential direction is measured.
[0009]
Furthermore, the phase measuring device for the combination type helical gear according to claim 7 couples a pair of helical gears concentrically to each other whose inclination directions are opposite to each other and whose pitch, inclination angle and diameter are equal to each other. These are the devices that measure the phase in the circumferential direction of the teeth of the helical gears, which constitute the fixed combination type helical gear.
The phase measuring device for a combination type splint gear according to claim 7 includes a first support plate, a support shaft, a second support plate, a first support block, a first plunger, and a first positioning piece. And a second support block, a second plunger, a second positioning piece, and a measuring instrument.
Of these, the support shaft is supported at one end of the first support plate at a right angle with respect to the first support plate, and the combination type splint gear is not loosened around the middle portion. Fits freely.
The second support plate is detachably attached to the distal end portion of the support shaft in a state of being arranged parallel to the first support plate, and is rotatable about the support shaft. .
The first support block is supported and fixed to one side of the first support plate facing the second support plate.
The first plunger is supported by the first support block in a state in which the tip end portion faces the support shaft so as to be displaceable in the diameter direction of the support shaft.
The first positioning piece is installed at the tip of the first plunger.
The second support block is supported and fixed on one side of the second support plate facing the first support plate.
The second plunger is supported by the second support block in a state in which the distal end portion faces the support shaft so as to be displaceable in the diameter direction of the support shaft.
The second positioning piece is installed at the tip of the second plunger and has the same shape and size as the first positioning piece.
Furthermore, the measuring device is for measuring a displacement amount of the second support plate with respect to the first support plate.
The distance between the first and second positioning pieces from the axially opposite end surfaces of the helical gear teeth is known in accordance with the displacement of the first and second plungers toward the tip side. The part can be freely engaged.
[0010]
[Action]
According to the method and apparatus for assembling the combination type helical gear according to claims 1 and 3 as described above, the first and second positioning pieces are engaged with the teeth of the helical gears. The two helical gears can be combined with each other in an appropriate phase relationship by bringing the helical gears close to each other and being fixedly coupled to each other.
According to the combination type helical gear phase measuring method and measuring device according to claims 5 and 7, both the first and second positioning pieces and both helical gear teeth are engaged with each other without rattling. Based on the amount of displacement of the first and second positioning pieces in the circumferential direction between the state and the state of matching the phases of the first and second positioning pieces in the circumferential direction, The phase of the helical gear teeth in the circumferential direction can be measured.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 4 show an example of an embodiment of an assembly device for a combination type helical gear according to the present invention corresponding to claims 1 to 4. The combination type helical gear assembly apparatus 1 is configured by combining and fixing a pair of helical gears 2a and 2b as shown in FIG. 1 to each other as shown in FIGS. In this case, both the above-mentioned two appropriately regulate the phase in the circumferential direction of the helical gears 2a, 2b. These helical gears 2a and 2b are opposite in inclination direction, and have the same pitch, tooth inclination angle and diameter-related dimensions (pitch circle, tip circle, and root circle diameter). In addition, the annular recess 5 and the annular projection 6 that fit in each other on the axially opposite end surfaces of the boss portions 4a and 4b provided at the central portions of the helical gears 2a and 2b without rattling. Are formed concentrically with the respective helical gears 2a, 2b.
[0012]
The combination type helical gear assembly apparatus 1 in which both the helical gears 2a and 2b as described above are combined in a state where the phase is properly regulated to form the combination type helical gear 3 is the first and the second. Two support plates 7, 8, first and second support projections 9, 10, first support block 11, first plunger 12, first positioning piece 13, second support block 14, A second plunger 15 and a second positioning piece 16 are provided.
[0013]
Of these, the first and second support plates 7 and 8 are installed in parallel to each other and movable freely. For this purpose, in the example shown in the figure, guide rods 17 and 17 are implanted vertically at the four corners of the upper surface of the first support plate 7 located on the lower side, and the upper ends of the guide rods 17 and 17 are connected to the first support plate 7. The sleeves 19 and 19 are inserted into guide holes 18 and 18 formed at the four corners of the two support plates 8 so as to be movable (lifted and lowered) in the axial direction. A compression coil spring (not shown) is disposed around each of the guide rods 17 and 17 to impart upward elasticity to the second support plate 8. Accordingly, the second support plate 8 descends against the elasticity of the compression coil springs (approaching the first support plate 7) only when pressed downward by a ram or the like of a pressing device (not shown).
[0014]
The first and second support projections 9 and 10 are provided concentrically with each other on the opposing portions of the first and second support plates 7 and 8, respectively, The gears 2a and 2b can be supported without rattling. Of these, the first support projection 9 is formed in the center of the upper surface of the first support plate 7 with its central axis parallel to the central axis of each of the guide rods 17 and 17 (with the central axis in the vertical direction). Fixed) On the other hand, the second support protrusion 10 is provided at the center of the second support plate 8 so as to be freely accessible from the lower surface of the second support plate 8.
[0015]
For this purpose, in the example shown in the figure, the lifting mechanism 20 is provided at the center of the upper surface of the second support plate 8 and the output rod 21 is parallel to the central axes of the guide rods 17 and 17 (the central axis is vertical). It is installed in the direction facing. And the elastic sleeve 22 which comprises the said 2nd support convex part 10 is supported by the lower end part of the said output rod 21. As shown in FIG. This elastic sleeve 22 has a plurality of cuts in the axial direction from both end edges in the axial direction so that the outer diameter can be elastically contracted by forming a half-phase shift between the both end edges. It is. When such an elastic sleeve 22 is lowered by the output rod 21, the lower half of the elastic sleeve 22 protrudes from the lower surface of the second support plate 8 as shown in FIGS. In this state, the outer diameter of the pair of helical gears 2a and 2b is pushed into the boss portion 4b of the helical gear 2b that is present on the upper side of the pair of helical gears 2a and 2b with the outer diameter thereof being elastically contracted. It is free.
[0016]
The first support block 11 is supported and fixed on one side of the first support plate 7 facing the second support plate 8, that is, the upper surface. Then, the first plunger 12 is supported on the first support block 11 in such a manner that the distal end portion is directed toward the first support convex portion 9 so that the first support convex portion 9 can be displaced in the diameter direction. ing. For this reason, in the case of this example, a first support hole 23 is formed in the first support block 11 over the diameter direction of the first support convex portion 9. The first support hole 23 is a through hole in which a small-diameter portion near the first support convex portion 9 and a large-diameter portion near the opposite are made continuous by a stepped portion. Further, an intermediate portion of the first plunger 12 is provided with a flange portion that cannot enter the small diameter portion and slidably engages with the large diameter portion. Further, the tail portion of the first plunger 12 (the right end portion in FIGS. 1 to 3) is slidably inserted through a through hole formed in the first holding plate 24 fixed to the outer end surface of the first support block 11 with screws. is doing. In addition, a compression coil spring is provided between the first holding plate 24 and the flange portion to give the first plunger 12 elasticity in a direction approaching the first support convex portion 9. The first plunger 12 is displaced in a direction away from the first support convex portion 9 by pulling the tail projecting from the first restraining plate 24. If the force pulling the tail is released, the compression coil The spring is displaced in a direction approaching the first support convex portion 9 by the elasticity of the spring.
[0017]
The first positioning piece 13 is installed at the tip of such a first plunger 12. As this 1st positioning piece 13, the steel ball (ball) for ball bearings is used, for example. In this case, the center of the steel ball is positioned on the central axis of the first plunger 12. Alternatively, the tip surface of the first plunger 12 may be formed in a hemispherical shape, and the tip portion of the first plunger 12 itself may be the first positioning piece 13. In this case, the hemispherical center of curvature is positioned on the central axis of the first plunger 12. Then, along with the displacement of the first plunger 12 toward the distal end side based on the elasticity of the compression spring, the outer side of the helical gear 2 a that supports the first positioning piece 13 on the upper surface of the first support plate 7. The peripheral edge can be freely engaged. The first positioning piece 13 is hung between the circumferential side surfaces of the teeth adjacent in the circumferential direction among the many teeth formed on the outer peripheral edge of the helical gear 2a when engaged. As is passed, the radius of curvature of the first positioning piece 13 is restricted. In other words, the positioning piece 13 does not hit the edge of the tooth tip or the tooth bottom, but hits the circumferential side surface of each tooth.
[0018]
On the other hand, the second support block 14 is supported and fixed to one side of the second support plate 8 facing the first support plate 7, that is, the lower surface. Then, the second plunger 15 is placed on the second support block 14 so that the second support convex portion 10 (and the first support convex portion 9) can be displaced in the diametrical direction. It supports in the state which turned to 10 side. For this reason, in the case of this example, the second support hole 25 is formed in the second support block 14 over the diameter direction of the second support convex portion 10. The second support hole 25 is a through hole in which a small-diameter portion near the second support convex portion 10 and a large-diameter portion near the opposite are made continuous by a stepped portion. Further, an intermediate portion of the second plunger 15 is provided with a flange portion that cannot enter the small diameter portion and slidably engages with the large diameter portion. Further, the tail portion of the second plunger 15 (the right end portion in FIGS. 1 and 3) is slidably inserted through a through hole formed in the second holding plate 26 fixed to the outer end surface of the second support block 14 with screws. is doing. Also this Second holding plate A compression coil spring is provided between the flange 26 and the flange portion to give the second plunger 15 elasticity in a direction approaching the second support convex portion 10. The second plunger 15 is displaced in a direction away from the second support convex portion 10 by pulling the tail protruding from the second holding plate 26. If the force pulling the tail is released, the compression coil The spring is displaced in the direction approaching the second support convex portion 10 by the elasticity of the spring.
[0019]
The second positioning piece 16 is installed at the tip of the second plunger 15. As the second positioning piece 16, a steel ball (ball) for ball bearings is used as in the first positioning piece 13, or the tip surface of the second plunger 15 is formed in a hemispherical shape. To do. Similar to the case of the first positioning piece 13, the center of the steel ball or the center of curvature of the hemispherical shape is positioned on the central axis of the second plunger 15. The second positioning piece 16 has the same shape and size as the first positioning piece 13. Then, along with the displacement of the second plunger 15 toward the distal end side based on the elasticity of the compression spring, the outer side of the helical gear 2 b that supports the second positioning piece 16 on the lower surface of the second support plate 8. The peripheral edge can be freely engaged. The second positioning piece 16 is hung between the circumferential side surfaces of the teeth adjacent to each other in the circumferential direction among the many teeth formed on the outer peripheral edge of the helical gear 2b. As is passed, the radius of curvature of the second positioning piece 16 is restricted.
[0020]
As shown in FIG. 2, the first plunger 12 and the second plunger 15 are provided so as to be shifted by an angle θ with respect to the circumferential direction. This angle θ is regulated according to the angle α that should shift the phase of the teeth formed on the outer peripheral edge portions of the pair of helical gears 2a and 2b. Both of these are θ = α + k · β, where β is the central angular pitch of the teeth formed on the outer peripheral edges of the helical gears 2a and 2b, and k is a natural number. When both the phases of the helical gears 2a and 2b are matched, θ = k · β. If the first and second support plates 7 and 8 are brought close to each other, there is no possibility that the first and second support blocks 11 and 14 interfere with each other. It is also good.
[0021]
Further, as described above, the engagement position in the axial direction between the outer peripheral edge of the helical gear 2a supported on the upper surface of the first support plate 7 and the first positioning piece 13, and the lower surface of the second support plate 8 The engaging positions in the axial direction between the outer peripheral edge of the helical gear 2b supported by the second positioning piece 16 and the second positioning piece 16 are the same. In the case of this example, the positions where the first and second positioning pieces 13 and 16 and the side surfaces of the teeth formed on the outer peripheral edge portions of the pair of helical gears 2a and 2b are engaged with each other. The positions of the helical gears 2a and 2b are equidistant from the opposite end surfaces in the axial direction of the teeth. As a precondition, the axial end surfaces of the boss portions 4a and 4b provided at the central portions of the helical gears 2a and 2b are used as the upper surface of the first support plate 7 or the second support plate. 8 against the lower surface. This point will be described with reference to FIG.
[0022]
In the case of the illustration, the engaging portion (the contact point between the side surface of the tooth and the first positioning piece 13) between the tooth formed on the outer peripheral edge of the lower helical gear 2a and the first positioning piece 13 is as follows. L from the lower edge of the tooth _1a , L from the upper edge _1b Exists in the distance. Further, the engaging portion between the teeth formed on the outer peripheral edge of the helical gear 2b on the upper side and the second positioning piece 16 is L from the upper edge of the teeth. _2a , L from the lower edge _2b Exists in the distance. In this example, L _1a = L _2a , L _1b = L _2b It is said. It should be noted that the widths of the teeth formed on the outer peripheral edges of the helical gears 2a and 2b are respectively W ₁ , W ₂ W ₁ = L _1a + L _1b = L _2a + L _2b = W ₂ It is. The positions where the first and second positioning pieces 13 and 16 and the side surfaces of the teeth formed on the outer peripheral edge portions of the pair of helical gears 2a and 2b are engaged with each other in the state expressed by the above formulas. In order to regulate, the distance between the centers of the first and second plungers 12 and 15 and the upper surface of the first support plate 7 or the lower surface of the second support plate 8, the both helical gears 2 a, It regulates appropriately by the relationship between the tooth | gear formed in the outer periphery of 2b, and the distance of these 1st, 2nd both support plates 7 and 8. FIG.
[0023]
However, if the distance from the axially opposite end surface of the tooth at the engagement position between the first and second positioning pieces 13 and 16 and the outer peripheral edge portions of the helical gears 2a and 2b is known, The positions where the first and second positioning pieces 13 and 16 engage with the teeth formed on the outer peripheral edge of the pair of helical gears 2a and 2b are the positions of the teeth of the helical gears 2a and 2b. The phases of the helical gears 2a and 2b can be calculated even if they are not equidistant from the axially opposite end face. Therefore, L _1a ≠ L _2a , L _1b ≠ L _2b However, the present invention can be implemented.
[0024]
The assembly device 1 configured as described above is used to combine the pair of helical gears 2a and 2b at a predetermined phase to obtain a combination type helical gear 3 as follows. First, the first and second support plates 7 and 8 are separated from each other as shown in FIG. The helical gear 2b is externally fitted to the second support convex portion 10 in which the helical gear 2a protrudes from the lower surface of the second support plate 8 without rattling. At this time, the upper end surface of the boss portion 4 b provided at the center portion of the helical gear 2 b is abutted against the lower surface of the second support plate 8. In this state, the second support convex portion 10 is elastically reduced in diameter and held so that the helical gear 2b does not fall. Of course, the lower end surface of the boss 4a provided at the center of the helical gear 2a hits the upper surface of the first support plate 7 by gravity. In this state, the pair of helical gears 2a and 2b are supported concentrically with each other. In addition, the annular recess 5 and the annular projection 6 are opposed to each other, formed at the ends of the boss portions 4a and 4b.
[0025]
Thus, in the state which supported both the helical gears 2a and 2b concentrically with each other, these both teeth are formed on the teeth formed on the outer peripheral edges of the helical gears 2a and 2b. The first and second positioning pieces 13 and 16 provided at the tip of 15 are engaged. At the time of this engagement operation, first, the first and second plungers 12 and 15 are retracted radially outward of the helical gears 2a and 2b against the elasticity of the compression spring. And in this state, on the extension line of the central axis of the first and second plungers 12 and 15, the portion between the teeth adjacent in the circumferential direction at the outer peripheral edge of the helical gears 2a and 2b. Position. Thereafter, the first and second positioning pieces 13 and 16 provided at the distal ends of the first and second plungers 12 and 15 are adjacent to each other in the circumferential direction based on the elasticity of the compression spring. Enter the part between the teeth. By this operation, the phases of the two helical gears 2a and 2b with respect to the central axis are regulated to a desired relationship.
[0026]
Next, with both the first and second positioning pieces 13 and 16 engaged with the teeth of the helical gears 2a and 2b, these two helical gears 2a and 2b are brought close to each other. As shown in FIG. 3, they are coupled and fixed to each other. At the time of coupling and fixing, the second support plate 8 is lowered against the elasticity of a compression coil spring (not shown) disposed around the guide rods 17 and 17 by a ram of a press device (not shown). At the time of the lowering, the second plunger 15 is lowered together with the second support plate 8, so that the phases of the helical gears 2a and 2b are maintained in the restricted state. As the second support plate 8 is lowered, the annular recess 5 and the annular projection 6 formed at the ends of the boss portions 4a and 4b are fitted together by an interference fit. In this state, the two helical gears 2a and 2b are coupled with each other while the phase in the circumferential direction is properly regulated.
[0027]
When the helical gears 2a and 2b are coupled to each other in this way, first, the elevating mechanism 20 raises the elastic sleeve 22 that has been lowered so far, which is the second support convex portion 10. The elastic sleeve 22 is extracted from the inside of the boss 4b formed at the center of the helical gear 2b. Next, the force pressing the second support plate 8 by the ram is released, and the second support plate 8 is raised by the elasticity of the compression coil spring (not shown). In this state, the combination type helical gear 3 formed by coupling the helical gears 2a and 2b based on the fitting of the annular recess 5 and the annular projection 6 is taken out.
[0028]
FIG. 4 shows the combination type helical gear 3 obtained in this way. In the case of this example, the annular recess 5 and the annular projection 6 are fitted with a sufficiently large interference fit, and thus can be used as they are as a combination type helical gear 3. On the other hand, depending on the application, the coupling force between the helical gears 2a and 2b may be insufficient only by fitting the annular recess 5 and the annular protrusion 6 together. Therefore, in such a case, after taking out the combination type helical gear 3 in which the annular concave portion 5 and the annular convex portion 6 are fitted, the combination type helical gear 3 is shown in FIGS. It is also possible to assemble a structure as shown in.
[0029]
First, in the structure of the first example shown in FIG. 5, a knock pin 27 is spanned between a pair of helical gears 2a and 2b. The circular hole for fitting the knock pin 27 is formed after the annular concave portion 5 and the annular convex portion 6 are fitted to form the combination type helical gear 3. It should be noted that a plurality of knock pins 27 are provided in the circumferential direction, and until the knock pins 27 are spanned between the helical gears 2a and 2b, these two pins are connected between the helical gears 2a and 2b. If the positional relationship can be regulated, the annular recess 5 and the annular projection 6 can be omitted. Even when the annular concave portion 5 and the annular convex portion 6 are provided, it is also possible to perform a stamp seal fitting for simple alignment.
[0030]
Next, the structure of the 2nd example shown in FIG. 6 couple | bonds a pair of helical gears 2a and 2b with the some volt | bolts 28 and 28 and the nut 29. FIG. The circular holes for inserting the bolts 28 and 28 are formed after the annular concave portion 5 and the annular convex portion 6 are fitted to form the combination type helical gear 3. Also in this example, until the both helical gears 2a and 2b are coupled to each other by the bolts 28 and 28 and the nut 29, the positional relationship between the helical gears 2a and 2b can be regulated. In this case, the annular concave portion 5 and the annular convex portion 6 can be omitted. Even when the annular concave portion 5 and the annular convex portion 6 are provided, it is also possible to perform a stamp seal fitting for simple alignment.
[0031]
Next, in the case of the structure of the third example shown in FIG. 7, a short cylindrical coupling sleeve 30 is spanned between a pair of helical gears 2a ′ and 2b ′. The coupling sleeve 30 is formed on the portions of the helical gears 2a ′ and 2b ′ facing each other at the same time as the two helical gears 2a ′ and 2b ′ are brought close to each other in phase. The ring-shaped recesses 5 and 5 are fitted with an interference fit, and both of them are spanned between the helical gears 2a 'and 2b'.
[0032]
Further, in the case of the structure of the fourth example shown in FIG. 8, a cylindrical spline sleeve 31 is stretched between a pair of helical gears 2a, 2b, both of which are helical gears 2a, The spline sleeve 31 is prevented from coming off by retaining rings 32, 32 locked to the inner peripheral surface 2b. In order to engage the male spline grooves formed on the outer peripheral surface of the spline sleeve 31, the female spline grooves provided on the inner peripheral surfaces of the helical gears 2a and 2b are in phase with the helical gears 2a and 2b. Formed after combining. In the case of this example, as long as the positional relationship between the helical gears 2a and 2b can be regulated until the spline sleeve 31 is passed (or a female spline groove is formed), The annular recess 5 and the annular protrusion 6 can be omitted. Even when the annular concave portion 5 and the annular convex portion 6 are provided, it is also possible to perform a stamp seal fitting for simple alignment.
[0033]
Next, FIGS. 9 to 12 show an example of the embodiment of the phase measuring apparatus for the combination type helical gear according to the present invention, corresponding to claims 5 to 8. The phase measuring device 33 includes a first support plate 7a, a support shaft 34, a second support plate 8a, a first support block 11a, a first plunger 12a, a first positioning piece 13a, and a second support block. 14a, a second plunger 15a, a second positioning piece 16a, and a measuring instrument 35.
[0034]
Of these, the support shaft 34 is arranged on the upper surface, which is one side of the first support plate 7a, and the lower end, which is the base end, is perpendicular to the first support plate 7a, that is, the central axis is arranged in the vertical direction. It is supported and fixed in the state. As shown in FIG. 11, such a support shaft 34 has a combination type helical gear 3 formed by connecting and fixing a pair of helical gears 2a and 2b around the intermediate portion thereof, so that it can be externally fitted without rattling. It is free.
[0035]
The second support plate 8a is detachably attached to an upper end portion, which is a tip portion of the support shaft 34, in a state where the second support plate 8a is arranged in parallel with the first support plate 7a, and the support shaft 34 is centered. It is provided so that it can rotate freely. For this reason, in this example, the peripheral portion of the through hole 36 formed in the central portion of the second support plate 8a at the central portion of the second support plate 8a is separated by a pair of upper and lower thrust bearings 37, 37. It is pinched. These thrust bearings 37, 37 and the central portion of the second support plate 8a are connected to the sleeve 38 (FIG. 9) fitted on the support shaft 34 or the central portion of the combination type spur gear 3 during the measurement operation. It is sandwiched between the upper end surface of the provided boss portion 4 b (FIG. 11) and the lower surface of the nut 39 screwed to the upper end portion of the support shaft 34.
[0036]
The first support block 11a is supported and fixed to the upper surface which is one side of the first support plate 7a facing the second support plate 8a. The first plunger 12a is supported on the first support block 11a in a state in which the distal end portion faces the support shaft 34 so as to be displaceable in the diameter direction of the support shaft 34. The first positioning piece 13a is installed at the tip of the first plunger 12a. In addition, regarding the structure and function of these 1st support block 11a, the 1st plunger 12a, and the 1st positioning piece 13a, the 1st support block 11 and the 1st plunger which comprise the assembly apparatus 1 shown in above-mentioned FIGS. 1-3. 12. Since it is the same as the structure and function of the 1st positioning piece 13, the same code | symbol is attached | subjected to an equivalent part and the overlapping description is abbreviate | omitted.
[0037]
The second support block 14a is supported and fixed to the lower surface which is one side of the second support plate 8a facing the first support plate 7a. The second plunger 15a is supported on the second support block 14a so that the distal end of the second plunger 15a faces the support shaft 34 so as to be displaceable in the diameter direction of the support shaft 34. The second positioning piece 16a is installed at the tip of the second plunger 15a and has the same shape and size as the first positioning piece 13a. Regarding the configuration and functions of the second support block 14a, the second plunger 15a, and the second positioning piece 16a, the second support block 14, the second plunger 15, and the assembly device 1 shown in FIGS. Since it is the same as the structure and function of the 2nd positioning piece 16, the same code | symbol is attached | subjected to an equivalent part and the overlapping description is abbreviate | omitted.
[0038]
However, in the case of the first and second support blocks 11a and 14a constituting the phase measuring device 33 of this example, unlike the first and second support blocks 11 and 14 constituting the assembly device 1, the circumference It is provided in a portion where the phase with respect to the direction substantially coincides. More specifically, the second support plate 8a is rotated with respect to the support shaft 34, and the length direction of the second support plate 8a matches the length direction of the first support plate 7a. Thus, the installation position and the installation direction of the first and second support blocks 11a and 14a are regulated so that the first and second plungers 12a and 15a are parallel to each other.
[0039]
As the first plunger 12a and the second plunger 15a are displaced toward the distal end side, the first positioning piece 13a and the second positioning piece 16a are moved outside the helical gears 2a and 2b. It is possible to engage with the equidistant position portion from the end surface on the opposite side in the axial direction of the tooth formed on the peripheral edge. For this reason, in the illustrated example, both the positioning pieces 13a and 16a are allowed to abut on the center position in the width direction of the teeth formed on the outer peripheral edges of the helical gears 2a and 2b.
[0040]
Further, the measuring device 35 is for measuring the amount of displacement of the second support plate 8a with respect to the first support plate 7a. In the illustrated example, a micrometer head is used. That is, the measuring device 35 is supported on the upper surface of the first support plate 7a by the support bracket 40, and the abutting piece 42 in which the measurement terminal 41 of the measuring device 35 is fixed to the lower surface of the second support plate 8a. It has hit against. With this configuration, the rotation angle of the second support plate 8 a around the support shaft 34 can be measured as the displacement amount of the abutting piece 42.
[0041]
The phase measuring device 33 configured as described above is used to measure the phase of the pair of helical gears 2a and 2b constituting the combination type helical gear 3 as follows. . First, the initial setting operation of the measuring device 35 is performed. In this initial setting operation, the phases of the first and second positioning pieces 13a and 16a in the circumferential direction are matched as shown in FIGS. That is, a pair of L-shaped blocks 43, 43 are arranged on the upper surface of the first support plate 7a with their flat surfaces positioned at right angles, and the first flat plate 7a is placed at the intersection of the two flat surfaces. The first and second positioning pieces 13a and 16a are brought into contact with each other. In this state, the phases of the first and second positioning pieces 13a and 16a in the circumferential direction coincide with each other. Therefore, the indicated value of the measuring device 35 in this state is set to an initial value (zero point). At this time, the sleeve 38 is fitted onto the support shaft 34 to support the second support plate 8a.
[0042]
Next, as shown in FIGS. 11 to 12, the combination type helical gear 3 formed by combining the pair of helical gears 2 a and 2 b is externally fitted to the support shaft 34. In this state, the second support plate 8a The The bosses 4a and 4b provided at the center of the combination type blind gear 3 are supported. Therefore, in this state, the first and second positioning pieces 13a and 16a provided at the distal ends of the first and second plungers 12a and 15a are connected to the outer peripheral edges of the helical gears 2a and 2b. Of the teeth formed on the part, the teeth are entered between the teeth adjacent in the circumferential direction. At this time, by rotating the second support plate 8a around the support shaft 34, the first and second positioning pieces 13a and 16a are formed on the outer peripheral edge portions of the helical gears 2a and 2b. Each tooth is engaged with each other without rattling.
[0043]
9-10, the first and second positioning pieces 13a, 16a have the same phase in the circumferential direction, and the positioning phases 13a, 16a are in phase with each other. The rotation angle of the second support plate 8a is measured between the gears 2a and 2b and the state matched to the phases of the gears 2a and 2b. In the case of this example, the rotation angle is obtained as follows as a displacement amount of the abutting piece 42 measured by the measuring device 35.
[0044]
The distance between the center of the support shaft 34 and the contact position between the measuring end of the measuring device 35 and the abutting piece 42 is R, and the displacement amount of the abutting piece in the two types of states is L. To do. In this case, if the rotation angle θ (the phase difference between the two helical gears 2a and 2b) is small, sin θ≈θ, and therefore the rotation angle θ is obtained by θ = L / R. On the other hand, when the rotation angle is large and sin θ≈θ does not hold, as is apparent from FIG. 13, the rotation angle θ is set to θ = sin ^-1 Obtained by (L / R).
[0045]
In the illustrated example, a pair of helical gears, each formed independently of other parts such as a transmission, are combined in a predetermined phase, or a pair of combined helical gears. The case of measuring the phase between gears is shown. However, the present invention is not limited to the case of carrying out a pair of helical gears independent of such other parts, but a pair of parts formed integrally with a helical gear may be combined in a predetermined phase. The present invention can also be applied to the case of measuring the phases of helical gears directly formed on a pair of parts combined. For example, the inclination directions of the pair of output side disks constituting a double-cavity toroidal continuously variable transmission used as a transmission unit of an automatic transmission for automobiles are opposite to each other. It is considered to form gears directly. In such a case, the present invention can be used to combine the pair of output side disks with a predetermined phase or measure the phase of the pair of output side disks combined. In this case, it is obvious that both the output side disks correspond to the helical gears described in the claims. Of course, it can also be implemented in connection with an independent helical gear and a helical gear provided integrally with other components.
[0046]
【The invention's effect】
Since the assembly method and assembly device and phase measurement method and measurement device of the combination type spur gear of the present invention are configured and act as described above, a high-precision combination type spur gear that does not generate a thrust force during rotation transmission. Can be realized. And it can contribute to the performance improvement of the transmission for motor vehicles and various industrial machines which incorporated the combination type and the spur gear.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of an embodiment of an assembly device for a combination type helical helical gear according to the present invention before the helical gears are coupled together.
FIG. 2 is a plan view showing a part thereof omitted.
FIG. 3 is a longitudinal sectional view showing helical gears coupled together.
FIG. 4 is a cross-sectional view showing a first example of a structure for coupling and fixing helical gears.
FIG. 5 is a plan view and a cross-sectional view showing a second example.
FIG. 6 is a plan view and a sectional view showing a third example.
FIG. 7 is a cross-sectional view showing a fourth example.
FIG. 8 is a sectional view showing a fifth example.
FIG. 9 is a longitudinal sectional view showing an example of the embodiment of the phase measuring device for a combination type helical gear according to the present invention in a state in which the phases of the first and second positioning pieces are matched.
10 is a plan view seen from above in FIG. 9 with a part omitted. FIG.
FIG. 11 is a longitudinal sectional view showing a state in which the phases of the first and second positioning pieces are shifted in accordance with a pair of helical gears constituting a combination type helical gear.
12 is a plan view seen from above in FIG. 11 with a part omitted. FIG.
FIG. 13 is a schematic diagram showing a case where a phase shift angle is obtained from a displacement amount of a second support plate.
[Explanation of symbols]
1 Assembly equipment
2a, 2b, 2a ', 2b' helical gears
3 Combination type blind gear
4a, 4b Boss
5 annular recess
6 annular projection
7, 7a First support plate
8, 8a Second support plate
9 First support protrusion
10 Second support protrusion
11, 11a First support block
12, 12a First plunger
13, 13a First positioning piece
14, 14a Second support block
15, 15a Second plunger
16, 16a Second positioning piece
17 Guide rod
18 Guide hole
19 sleeve
20 Lifting mechanism
21 Output rod
22 Elastic sleeve
23 First support hole
24 First holding plate
25 Second support hole
26 Second holding plate
27 knock pin
28 volts
29 nuts
30 coupling sleeves
31 Spline sleeve
32 retaining ring
33 Phase measuring device
34 Support shaft
35 Measuring instrument
36 through holes
37 Thrust bearing
38 sleeve
39 Nut
40 Support bracket
41 Measuring terminal
42 Colliding pieces
43 L-shaped block

Claims

A method for assembling a combination type helical gear comprising a pair of helical gears having opposite inclination directions and having the same pitch, inclination angle, and diameter dimensions, concentrically coupled to each other. A pair of helical gears are arranged concentrically with each other, and these two gears are arranged between the teeth adjacent to each other in the circumferential direction among the plurality of teeth formed on the outer peripheral edge of the helical gear. The first and second parts having the same shape and size in the part where the distance from the opposite end face in the axial direction is the same, and the phase with respect to the central axis of the helical gears being regulated to a desired relationship By engaging the two positioning pieces without rattling, the phase of the helical gears in the circumferential direction is restricted to the desired relationship, and then the first and second positioning pieces and the two are These remain engaged with the helical gear teeth. Gear assembly method of Invite mountain combinational coupling fixed to each other close to the gears with each other helical.

The positions where the first and second positioning pieces engage with the outer peripheral edge of the pair of helical gears are equidistant from the axially opposite end surfaces of the helical gear teeth. A method for assembling the combination type splint gear according to item 1.

An assembling apparatus for assembling a combination type helical gear in which a pair of helical gears whose inclination directions are opposite to each other and whose pitch, inclination angle, and diameter are equal to each other are coupled and fixed concentrically. The first and second support plates installed parallel to each other and freely movable, and concentric with each other on the opposing portions of the two support plates. First and second support convex portions that can be supported without rattling, a first support block that is supported and fixed to one surface of the first support plate that faces the second support plate, and the first support block The first plunger is supported at the tip of the first plunger, and the first plunger is supported in a state in which the tip is directed toward the first support convex so that the first support convex can be displaced in the diameter direction. First positioning piece and the second support Among these, the second support block supported and fixed on one surface facing the first support plate, and the second support block are displaceable in the diametrical direction of the second support convex portion with the second end portion being the second support block. A second plunger supported in a state directed toward the support convex portion, and a second positioning piece installed at the tip of the second plunger and having the same shape and size as the first positioning piece. The first and second positioning pieces are displaced in accordance with the displacement of the first and second plungers toward the tip side, and the distances from the opposite end surfaces of the helical gear teeth in the axial direction are known. An assembly device for a combination type bevel gear that is freely engageable with the position portion.

The positions where the first and second positioning pieces engage with the outer peripheral edge of the pair of helical gears are equidistant from the axially opposite end surfaces of the helical gear teeth. Item 4. A combination type bevel gear assembling apparatus according to Item 3.

A pair of helical gears that are opposite to each other in inclination direction and that have the same dimensions in terms of pitch, inclination angle, and diameter are coupled and fixed concentrically with each other. A method for measuring a phase of a gear tooth in the circumferential direction, in which both the helical gears are arranged concentrically with each other, and both of them are circles of a plurality of teeth formed on the outer peripheral edge of the helical gear. Between the teeth adjacent in the circumferential direction, the first and second positioning pieces having the same shape and size are placed on the part where the distance from the axially opposite end face of the helical gear is known. A state in which the first and second positioning pieces are in phase with each other in a circumferential direction, and the first and second positioning pieces between the two states are Based on the amount of displacement in the circumferential direction Gear phase measurement methods if mountain combinational measuring the phase in the circumferential direction of the teeth of the helical gear.

The positions where the first and second positioning pieces engage with the outer peripheral edge of the pair of helical gears are equidistant from the axially opposite end surfaces of the helical gear teeth. Item 6. A phase measuring method for a combination type splint gear described in Item 5.

A pair of helical gears that are opposite to each other in inclination direction and that have the same dimensions in terms of pitch, inclination angle, and diameter are coupled and fixed concentrically with each other. A device for measuring the phase of a gear tooth in the circumferential direction, comprising a first support plate, a base end portion of which is supported on one side of the first support plate, and a right angle with respect to the first support plate. A support shaft that can be freely fitted around the intermediate portion without looseness of the combined type and the spur gear, and is detachably attached to the tip of the support shaft in a state of being arranged in parallel to the first support plate, and A second support plate rotatably provided around the support shaft, a first support block supported and fixed on one side of the first support plate facing the second support plate, and the first support block The support block can be displaced in the diameter direction of the support shaft. Of the first support, the first plunger is supported with the tip portion directed toward the support shaft, the first positioning piece installed at the tip portion of the first plunger, and the second support plate. A second support block supported and fixed on one side facing the plate, and supported by the second support block in a state in which the tip portion is directed to the support shaft side so as to be displaceable in the diameter direction of the support shaft. A second plunger, a second positioning piece installed at the tip of the second plunger and having the same shape and size as the first positioning piece, and displacement of the second support plate relative to the first support plate A measuring instrument for measuring the amount of the first and second positioning pieces as the first and second plungers are displaced toward the tip side, and both the helical gear teeth are opposite to each other in the axial direction. It is possible to engage with a position part whose distance from the side end surface is known. Seen fit equation mountain If the gear of the phase measurement device.

The positions where the first and second positioning pieces engage with the outer peripheral edge of the pair of helical gears are equidistant from the axially opposite end surfaces of the helical gear teeth. Item 8. A phase measuring device for a combination type coiled gear according to item 7.