JP4232514B2 - Continuously variable transmission - Google Patents

Continuously variable transmission Download PDF

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Publication number
JP4232514B2
JP4232514B2 JP2003104447A JP2003104447A JP4232514B2 JP 4232514 B2 JP4232514 B2 JP 4232514B2 JP 2003104447 A JP2003104447 A JP 2003104447A JP 2003104447 A JP2003104447 A JP 2003104447A JP 4232514 B2 JP4232514 B2 JP 4232514B2
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Japan
Prior art keywords
continuously variable
variable transmission
planetary gear
shaft
carrier
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JP2004308814A (en
JP2004308814A5 (en
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尚 今西
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NSK Ltd
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NSK Ltd
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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
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/048Type of gearings to be lubricated, cooled or heated
    • F16H57/0482Gearings with gears having orbital motion
    • 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
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/048Type of gearings to be lubricated, cooled or heated
    • F16H57/0487Friction gearings
    • F16H57/049Friction gearings of the toroid type

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • General Details Of Gearings (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、車両(自動車)用自動変速装置として利用する、トロイダル型無段変速機と遊星歯車式変速機とを組み込んだ無段変速装置の改良に関する。具体的には、これらトロイダル型無段変速機と遊星歯車式変速機との接合部の摩耗防止と、遊星歯車式変速機に組み込んだラジアルニードル軸受の潤滑性向上との両立を図るものである。
【0002】
【従来の技術】
自動車用自動変速装置としてトロイダル型無段変速機を使用する事が研究され、一部で実施されている。又、トロイダル型無段変速機と遊星歯車式変速機とを組み合わせて無段変速装置を構成する事が、特許文献1〜7に記載されている様に、従来から提案されている。図4は、このうちの特許文献2に記載された無段変速装置を示している。この無段変速装置は、トロイダル型無段変速機1と遊星歯車式変速機2とを組み合わせて成る。このうちのトロイダル型無段変速機1は、入力軸3と、1対の入力側ディスク4、4と、出力側ディスク5と、複数のパワーローラ6、6とを備える。
【0003】
又、上記遊星歯車式変速機2は、上記入力軸3及び一方(図4の右方)の入力側ディスク4に結合固定されたキャリア7を備える。このキャリア7の径方向中間部に、その両端部にそれぞれ遊星歯車8、9を固設した第一の伝達軸10を、回転自在に支持している。又、上記キャリア7を挟んで上記入力軸3と反対側に、その両端部に太陽歯車11、12を固設した第二の伝達軸13を、上記入力軸3と同心に、回転自在に支持している。そして、上記各遊星歯車8、9と、上記出力側ディスク5にその基端部(図4の左端部)を結合した中空回転軸14の先端部(図4の右端部)に固設した太陽歯車15又は上記第二の伝達軸13の一端部(図4の左端部)に固設した太陽歯車11とを、それぞれ噛合させている。又、一方(図4の左方)の遊星歯車8を、別の遊星歯車16を介して、上記キャリア7の周囲に回転自在に設けたリング歯車17に噛合させている。
【0004】
一方、上記第二の伝達軸13の他端部(図4の右端部)に固設した太陽歯車12の周囲に設けた第二のキャリア18に遊星歯車19、20を、回転自在に支持している。尚、この第二のキャリア18は、上記入力軸3及び第二の伝達軸13と同心に配置された、出力軸21の基端部(図4の左端部)に固設されている。又、上記各遊星歯車19、20は、互いに噛合すると共に、一方の遊星歯車19が上記太陽歯車12に、他方の遊星歯車20が、上記第二のキャリア18の周囲に回転自在に設けた第二のリング歯車22に、それぞれ噛合している。又、上記リング歯車17と上記第二のキャリア18とを低速用クラッチ23により係脱自在とすると共に、上記第二のリング歯車22とハウジング等の固定の部分とを、高速用クラッチ24により係脱自在としている。
【0005】
上述の様な、図4に示した無段変速装置の場合、上記低速用クラッチ23を接続すると共に上記高速用クラッチ24の接続を断った、所謂低速モード状態では、上記入力軸3の動力が上記リング歯車17を介して上記出力軸21に伝えられる。そして、前記トロイダル型無段変速機1の変速比を変える事により、無段変速装置全体としての変速比、即ち、上記入力軸3と上記出力軸21との間の変速比が変化する。この様な低速モード状態では、無段変速装置全体としての変速比は、無限大に変化する。即ち、上記トロイダル型無段変速機1の変速比を調節する事により、上記入力軸3を一方向に回転させた状態のまま上記出力軸21の回転状態を、停止状態を挟んで、正転、逆転の変換自在となる。
【0006】
これに対して、上記低速用クラッチ23の接続を断ち、上記高速用クラッチ24を接続した、所謂高速モード状態では、上記入力軸3の動力が上記第一、第二の伝達軸10、13を介して上記出力軸21に伝えられる。そして、上記トロイダル型無段変速機1の変速比を変える事により、無段変速装置全体としての変速比が変化する。この場合には、上記トロイダル型無段変速機1の変速比を大きくする程、無段変速装置全体としての変速比が大きくなる。
【0007】
【特許文献1】
特開平6−174033号公報
【特許文献2】
特開2000−220719号公報
【特許文献3】
特開2002−139124号公報
【特許文献4】
米国特許第5607372号明細書
【特許文献5】
米国特許第6059685号明細書
【特許文献6】
米国特許第6099431号明細書
【特許文献7】
米国特許第6358178号明細書
【0008】
【先発明の説明】
又、特願2003−56681号には、図5に示す様な無段変速装置が開示されている。この図5に示した無段変速装置は、前述の図4に示した従来から知られている無段変速装置と同様の機能を有するもであるが、遊星歯車式変速機2a部分の構造を工夫する事により、この遊星歯車式変速機2a部分の組立性を向上させている。入力軸3及び1対の入力側ディスク4、4と共に回転するキャリア7aの両側面に、それぞれ1対ずつの遊星歯車25a、25b、26a、26bを、回転自在に支持している。そして、上記キャリア7aの各側面に支持した各遊星歯車25a、25b同士、各遊星歯車26a、26b同士を、互いに噛合させると共に、内径側の遊星歯車25a、26aを、出力側ディスク5にその基端部(図5の左端部)を結合した中空回転軸14aの先端部(図5の右端部)及び伝達軸27の一端部(図5の左端部)にそれぞれ固設した第一、第二の太陽歯車28、29に、外径側の遊星歯車25b、26bをリング歯車30に、それぞれ噛合させている。
【0009】
一方、上記伝達軸27の他端部(図5の右端部)に固設した第三の太陽歯車31の周囲に設けた第二のキャリア18aに遊星歯車32a、32bを、回転自在に支持している。尚、この第二のキャリア18aは、上記入力軸3と同心に配置された出力軸21aの基端部(図5の左端部)に固設されている。又、上記各遊星歯車32a、32bは、互いに噛合すると共に、内径側の遊星歯車32aを上記第三の太陽歯車31に、外径側の遊星歯車32bを、上記第二のキャリア18aの周囲に回転自在に設けた第二のリング歯車22aに、それぞれ噛合させている。又、上記リング歯車30と上記第二のキャリア18aとを低速用クラッチ23aにより係脱自在とすると共に、上記第二のリング歯車22aとハウジング等の固定の部分とを、高速用クラッチ24aにより係脱自在としている。
【0010】
この様に構成する改良された無段変速装置の場合、上記低速用クラッチ23aを接続し、上記高速用クラッチ24aの接続を断った状態では、上記入力軸3の動力が、上記リング歯車30を介して上記出力軸21aに伝えられる。そして、トロイダル型無段変速機1の変速比を変える事により、無段変速装置全体としての変速比、即ち、上記入力軸3と上記出力軸21aとの間の変速比が変化する。これに対して、上記低速用クラッチ23aの接続を断ち、上記高速用クラッチ24aを接続した状態では、上記入力軸3の動力が、前記各遊星歯車25a、25b、上記リング歯車30、前記各遊星歯車26a、26b、前記伝達軸27、前記各遊星歯車32a、32b、上記第二のキャリア18aを介して、上記出力軸21aに伝えられる。そして、上記トロイダル型無段変速機1の変速比を変える事により、無段変速装置全体としての変速比が変化する。
【0011】
尚、次述する図6〜7に示す様に、外径側の遊星歯車25として、軸方向寸法が長いものを使用すると共に、この長い遊星歯車25を内径側の遊星歯車25a、26a及びリング歯車30aに噛合させる構造を採用しても、同様の機能を発揮できる。この場合には、直径の大きなリング歯車30aの軸方向寸法を短縮して、遊星歯車式変速機2bの軽量化を図れる。
【0012】
前述した図4及び上述した図5の構造は、原理的なもので、具体的な構造を示したものではない。実際に無段変速装置を構成する場合には、各部を回転自在に支持する構造、並びに、回転支持部に潤滑油(トラクションオイル)を供給する為の構造が必要になる。図6〜7は、この様な点を考慮して、先に考えた無段変速装置の具体的構造の1例を示している。尚、この構造では、上述した様に、外径側の遊星歯車25として軸方向寸法が長いものを使用すると共に、この長い遊星歯車25を、内径側の遊星歯車25a、26a及びリング歯車30aに噛合させている。
【0013】
ハウジング33内の所定位置に、それぞれの中間部に環状部を備えた1対の支柱34、34を、連結板35とバルブボディー36とを介して支持固定している。このバルブボディー36内には、トロイダル型無段変速機1の変速比調節の為の制御弁装置を組み込んでいる。又、上記各支柱34、34の両端部には、パワーローラ6、6(図4参照)を支持するトラニオンの両端部を揺動及び軸方向の変位自在に支持する為の支持板37、37を支持している。又、上記各支柱34、34の中間部に設けた環状部同士の間に出力側ディスク5を、1対の転がり軸受38、38により、回転自在に支持している。又、上記出力側ディスク5の内径側に中空回転軸14aの基半部(図6の左半部)を、スプライン係合に基づき、回転伝達自在に結合している。
【0014】
そして上記中空回転軸14aの内側に、入力軸3aを挿通している。この入力軸3aの中間部基端寄り部分に一方(図6の左方)の入力側ディスク4aを、ボールスプライン39を介して支持すると共に、油圧式の押圧装置40により上記入力側ディスク4aを、上記出力側ディスク5に向け、押圧自在としている。これに対して他方(図6の右方)の入力側ディスク4bは上記中空回転軸14aの中間部先端寄り(図6の右寄り)部分の周囲に、ラジアルニードル軸受41により、回転及び軸方向の変位自在に支持している。そして、上記他方の入力側ディスク4bと上記入力軸3aとを、キャリア7aを介して結合している。従って、上記出力側ディスク5を軸方向両側から挟む位置に設けた1対の入力側ディスク4a、4bは、上記入力軸3aと上記キャリア7aとを介して、同期して回転する。
【0015】
上記キャリア7aは、断面L字形で全体を円環状とした中間支持板42と、それぞれが円輪状に形成された1対の連結板43a、43bとの間に、それぞれ複数本ずつ(例えば3本ずつ)の遊星軸44a、44b、44cを掛け渡している。そして、これら各遊星軸44a、44b、44cの周囲に前記各遊星歯車25a、26a、25を、それぞれラジアルニードル軸受45a、45b、45cを介して、回転自在に支持している。そして、外径側の遊星歯車25と内径側の各遊星歯車25a、26aとを、互いに噛合させると共に、内径側の遊星歯車25a、26aを、上記中空回転軸14aの先端部(図6の右端部)に固設した第一の太陽歯車28又は伝達軸27の基端部に固設した第二の太陽歯車29に、外径側の遊星歯車25をリング歯車30aに、それぞれ噛合させている。
【0016】
上記各遊星軸44a、44b、44cの中心部には通油路46a、46b、46cを、軸方向中間部にはこれら各通油路46a、46b、46cと上記各遊星軸44a、44b、44cの外周面とを通じさせるノズル孔47a、47b、47cを、それぞれ設けている。又、内径側の遊星軸44a、44bの中心部に形成した通油路46a、46b同士は、上記中間支持板42に対する嵌合支持部で互いに対向する事により、互いに連通している。更に、前記入力軸3aの中心部に形成した給油路48と、上記通油路46b、46cとを、この入力軸3aの先端部(図6の右端部)及び上記第二の太陽歯車29の基端部にそれぞれ形成した給油孔49、50と、前記連結板43bに形成した給油路51、51とにより、連通させている。
【0017】
又、上記中間支持板42の中心に設けた円筒部52は、上記入力軸3aの中間部先端寄り部分にスプライン係合させ、ローディングナット53により抑え付けている。このローディングナット53は、上記第二の太陽歯車29の中心孔54内に入り込んでおり、これらローディングナット53の外周面と中心孔54の内周面との間に、ラビリンスシールを構成している。従って、上記入力軸3aの先端部の給油孔49から上記中心孔54の奥部に吐出した潤滑油は、上記第二の太陽歯車29の基端部に形成した給油孔50、50を通じて、上記支持板43bに形成した給油路51、51に、効果的に導かれる。尚、図示は省略するが、上記中間支持板42の円輪部55と上記各連結板43a、43bとは、前記各遊星歯車25、25a、26aから円周方向に外れた位置に設けた連結部により、互いに連結している。この構成により、前記キャリア7aの、回転伝達方向の力に対する強度及び剛性を確保している。
【0018】
又、前記他方の入力側ディスク4bと上記キャリア7aとの間での回転伝達を行なわせるべく、この入力側ディスク4bの外側面複数個所に形成した凸部56と、上記連結板43aの外周縁部に形成した切り欠き57とを係合させている。更に、この連結板43aと上記入力側ディスク4bの外側面との突き合わせ部に潤滑油を供給して、この突き合わせ部のフレッチング摩耗の防止を図っている。この為に、上記入力軸3aの中心に設けた給油路48内の潤滑油を、この入力軸3aの中間部に形成した給油孔58と、前記中空回転軸14aの中間部先端寄り部分に形成した給油孔59とを通じて、上記突き合わせ部に送り込み自在としている。
【0019】
上述の様な、図6〜7に示した無段変速装置の運転時には、駆動軸60により上記入力軸3aを回転駆動する。同時に、前記押圧装置40に油圧を導入して、前記各入力側ディスク4a、4b及び出力側ディスク5の側面と前記各パワーローラ6、6の周面との転がり接触部(トラクション部)の面圧を確保する。又、上記給油路48内に潤滑油を送り込んで、この潤滑油を、前記各ラジアルニードル軸受45a〜45c等の回転支持部及び上記突き合わせ部に供給し、各部の潤滑及び冷却を行なう事で、これら各部に摩耗や焼き付き等の損傷が発生するのを防止する。
【0020】
【発明が解決しようとする課題】
前述の様に構成し上述の様に作用する先発明に係る無段変速装置の場合、入力側ディスク4b寄りで内径側の遊星歯車25aを支持するラジアルニードル軸受45aの潤滑と、キャリア7aの連結板43aと入力側ディスク4bの外側面との突き合わせ部の潤滑とを、必ずしも十分に両立できない。この理由は、上記ラジアルニードル軸受45aを流通する潤滑油の量を多くすると、中空回転軸14aの中間部先端寄り部分に形成した給油孔59から上記連結板43aの内径側に吐出された潤滑油が、必ずしも上記突き合わせ部の潤滑に有効に利用されない為である。この点に就いて、以下に説明する。
【0021】
無段変速装置の運転時に上記ラジアルニードル軸受45aは高速で回転する為、損傷防止の為にはこのラジアルニードル軸受45aを通過する潤滑油の量を多くする必要がある。そして、この量を多くする為には、遊星軸44aの中心部に形成した通油路46aからの潤滑油の送り込みに対する背圧を低くする必要がある。更に、この背圧を低くする為には、上記遊星歯車25aの端面と上記連結板43aの側面との間に挟持するスラストワッシャ61が上記潤滑油の流通に対する抵抗になるのを低く抑える必要がある。このスラストワッシャ61の側面には、本発明の実施の形態の1例を示す様に複数の凹溝62、62を放射方向に形成しており、これら各凹溝62、62の数を増やしたり、これら各凹溝62、62の幅及び深さにより定まる断面積を広くすれば、上記抵抗を低く抑えられる。そして、上記ラジアルニードル軸受45aを通過する潤滑油の量を多くできる。
【0022】
ところが、この様にしてこのラジアルニードル軸受45aを通過する潤滑油の量を多くすると、上記突き合わせ部に送り込まれる潤滑油の量が不足し易くなる。この理由は、前記給油孔59から上記連結板43aの内径側に吐出された潤滑油の多くが、上記突き合わせ部を通過せずに、上記各凹溝62、62を通過して流れる為である。即ち、上記給油孔59から上記連結板43aの内径側に吐出された潤滑油は、上記突き合わせ部か、或は上記連結板43aと前記遊星歯車25aの端面との間を通過して、この連結板43aの径方向外側に排出される。この際に潤滑油は、抵抗の小さい部分を流れようとする為、上記各凹溝62、62の数を増やしたり断面積を広くして上記連結板43aと前記遊星歯車25aの端面との間の抵抗を低くすると、上記突き合わせ部を通過する潤滑油の量が少なくなる。
【0023】
上記給油孔59から上記連結板43aの内径側に吐出された潤滑油は、上記各凹溝62、62を通過する以外にも、前記遊星歯車25aと前記キャリア7aとの間部分に存在する隙間等を通じて排出されるが、図6〜7に示した構造の場合、上記突き合わせ部のフレッチング摩耗防止の面からは、この突き合わせ部以外の流路を極力狭くする事が必要になる。但し、この突き合わせ部以外の流路は、必ずしも十分に狭くできない。
これらの事を考慮すれば、上記突き合わせ部を通過する潤滑油の量を確保しつつ、上記ラジアルニードル軸受45aを通過する潤滑油の量を多くできる構造の実現が望まれる。
本発明の無段変速装置は、この様な事情に鑑みて発明したものである。
【0024】
【課題を解決するための手段】
本発明の無段変速装置は、入力軸と、出力軸と、トロイダル型無段変速機と、遊星歯車式変速機とを備える。
そして、これらトロイダル型無段変速機と遊星歯車式変速機とは、トロイダル型無段変速機を構成する入力側ディスクと遊星歯車式変速機を構成するキャリアとを互いに対向させると共に、これら入力側ディスクとキャリアとが同期して回転する状態に組み合わされている。
又、上記キャリアに設けた遊星軸の周囲に遊星歯車が、ラジアルニードル軸受を介して回転自在に支持されている。
又、このラジアルニードル軸受に潤滑油を送り込む為の給油通路が設けられており、この給油通路からこのラジアルニードル軸受に送り込まれた潤滑油を、更に上記入力側ディスクと上記キャリアとの対向面同士の間に送り込み自在としている。
【0025】
【作用】
上述の様に構成する本発明の無段変速装置の場合、ラジアルニードル軸受に送り込まれた潤滑油を、更に上記入力側ディスクと上記キャリアとの対向面同士の間に送り込む為、これら対向面同士の突き合わせ部を通過する潤滑油の量を確保しつつ、上記ラジアルニードル軸受を通過する潤滑油の量を多くできる。
【0026】
【発明の実施の形態】
図1〜3は、本発明の実施の形態の1例を示している。尚、本例の特徴は、入力側ディスク4b寄りで内径側の遊星歯車25aを支持するラジアルニードル軸受45aの潤滑と、キャリア7aの連結板43aと上記入力側ディスク4bの外側面との突き合わせ部の潤滑とを両立させる為、上記ラジアルニードル軸受45aを通過した潤滑油の一部を、上記突き合わせ部に送り込む為の構造にある。その他の部分の構造及び作用は、前述の図6〜7に示した先発明に係る構造と同様であるから、同等部分に関する図示並びに説明は、省略若しくは簡略にし、以下、本発明の特徴部分を中心に説明する。
【0027】
上記連結板43aの円周方向複数個所(例えば円周方向等間隔3個所)に円孔63を、軸方向に貫通する状態で形成している。そして、これら各円孔63に上記遊星歯車25aを支持する為の遊星軸44aの軸方向一端部(図1の左端部)を、締り嵌めにより嵌合固定している。上記各円孔63の内周縁には、1乃至複数(図示の例では1)の切り欠き64を、上記連結板43aの両面同士を連通させる状態で形成している。この切り欠き64は、上記円孔63に上記遊星軸44aの端部を内嵌固定した場合にも塞がれず、上記連結板43aの内側面(上記遊星歯車25a側の面)から外側面(上記入力側ディスク4b側の面)に潤滑油を供給する給油路として機能する。この為、上記遊星軸44aの中心部に設けた通油路46aからノズル孔47aを通じて上記ラジアルニードル軸受45aに送り込まれた潤滑油の一部が、上記連結板43aと上記入力側ディスク4bの外側面との突き合わせ部に送り込まれる。
【0028】
更に本例の場合には、上記連結板43aの内側面(片側面)と上記遊星歯車25aの端面との間にスラストワッシャ61を設けている。このスラストワッシャ61のうちでの上記遊星歯車25aに対向する側面には複数(図示の例では4本)の凹溝62、62を、放射方向に形成している。又、上記スラストワッシャ61の内周縁の複数個所(図示の例では4個所)に、第二の切り欠き65、65を形成している。尚、これら各第二の切り欠き65、65と上記各凹溝62、62との円周方向に関する位相は、実際には図2に示す様に異なっているが、図1には、一致している如く描いている。更に、上記連結板43aの内側面で上記遊星軸44aの端部を囲む分に凹溝66を、全周に亙って形成している。そして、上記ラジアルニードル軸受45aに送り込まれた潤滑油の一部を、上記各第二の切り欠き65、65と上記凹溝66と上記切り欠き64とを通じて、上記連結板43aと上記入力側ディスク4bの外側面との突き合わせ部に送り込み自在としている。本例の場合、上記凹溝66を設ける事によって、上記各第二の切り欠き65、65と上記切り欠き64との位相に関係なく、上記ラジアルニードル軸受45aに送り込まれた潤滑油の一部を上記突き合わせ部に送り込める様にしている。
【0029】
上述の様に構成する本例の無段変速装置の場合、上記ラジアルニードル軸受45aに送り込まれた潤滑油を、更に前記入力側ディスク4bと上記連結板43aとの対向面同士の間の、内径寄り部分に送り込める。そして、この部分に送り込まれた潤滑油が、上記対向面同士の突き合わせ部に油膜を形成して、この突き合わせ部にフレッチング摩耗が生じる事を防止する。この様に突き合わせ部の潤滑に供する潤滑油は、上記ラジアルニードル軸受45aを潤滑したものを使用する為、上記突き合わせ部を通過する潤滑油の量を確保しつつ、上記ラジアルニードル軸受45aを通過する潤滑油の量を多くできる。即ち、このラジアルニードル軸受45aを通過する潤滑油の一部を上記突き合わせ部を通じて排出する事で、このラジアルニードル軸受45aに潤滑油を流通させる事に対する抵抗を低減し、このラジアルニードル軸受45aに潤滑油の量を増大させられる。同時に、上記突き合わせ部にも、必要とする潤滑油を、効率良く送り込める。
【0030】
尚、上記ラジアルニードル軸受45a及び上記突き合わせ部を通過する潤滑油の量は、前記切り欠き64、前記第二の切り欠き65、65、前記各凹溝62、66の数及び断面積を変える事により、適宜調節できる。又、図示の例では、スラストワッシャ61として単板構造(対向面同士の間に1枚のみ設ける構造)のものに就いて示したが、2枚構造(対向面同士の間に2枚設ける構造)を採用する事もできる。この場合には、上記ラジアルニードル軸受45aの側に、優れた耐摩耗性を有する鉄系金属製のものを、上記連結板43aの側に、自己潤滑性を有する銅系金属製のものを、それぞれ使用する事が好ましい。但し、2枚のスラストワッシャは、それぞれの内周縁部に形成した第二の切り欠きの位相を一致させた状態で、相対回転不能に組み合わせる。尚、本発明を実施する場合に、上記突き合わせ部に送り込む潤滑油の量をより多くすべく、前述した先発明と同様の給油孔59(図6〜7参照)を設ける事は自由である。
【0031】
【発明の効果】
本発明は、以上に述べた通り構成され作用するので、遊星歯車を支持するラジアルニードル軸受の潤滑と、キャリアと入力側ディスクとの突き合わせ部のフレッチング摩耗防止とを、高次元で両立し、優れた耐久性を有する無段変速装置を実現できる。
【図面の簡単な説明】
【図1】本発明の実施の形態の1例を示す、図6の右上部に相当する断面図。
【図2】スラストワッシャの斜視図。
【図3】キャリアを構成する連結板の部分斜視図。
【図4】従来から知られている無段変速装置の1例を示す略断面図。
【図5】先発明に係る無段変速装置の1例を示す略断面図。
【図6】先に考えた具体的構造の1例を示す部分断面図。
【図7】同じく図6の右上部拡大図。
【符号の説明】
1 トロイダル型無段変速機
2、2a、2b 遊星歯車式変速機
3、3a 入力軸
4、4a、4b 入力側ディスク
5 出力側ディスク
6 パワーローラ
7、7a キャリア
8 遊星歯車
9 遊星歯車
10 第一の伝達軸
11 太陽歯車
12 太陽歯車
13 第二の伝達軸
14、14a 中空回転軸
15 太陽歯車
16 遊星歯車
17 リング歯車
18、18a 第二のキャリア
19 遊星歯車
20 遊星歯車
21、21a 出力軸
22、22a 第二のリング歯車
23、23a 低速用クラッチ
24、24a 高速用クラッチ
25、25a、25b 遊星歯車
26a、26b 遊星歯車
27 伝達軸
28 第一の太陽歯車
29 第二の太陽歯車
30、30a リング歯車
31 第三の太陽歯車
32a、32b 遊星歯車
33 ハウジング
34 支柱
35 連結板
36 バルブボディー
37 支持板
38 転がり軸受
39 ボールスプライン
40 押圧装置
41 ラジアルニードル軸受
42 中間支持板
43a、43b 連結板
44a、44b、44c 遊星軸
45a、45b、45c ラジアルニードル軸受
46a、46b、46c 通油路
47a、47b、47c ノズル孔
48 給油路
49 給油孔
50 給油孔
51 給油路
52 円筒部
53 ローディングナット
54 中心孔
55 円輪部
56 凸部
57 切り欠き
58 給油孔
59 給油孔
60 駆動軸
61 スラストワッシャ
62 凹溝
63 円孔
64 切り欠き
65 第二の切り欠き
66 凹溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a continuously variable transmission that incorporates a toroidal type continuously variable transmission and a planetary gear type transmission that is used as an automatic transmission for a vehicle (automobile). Specifically, it is intended to achieve both the prevention of wear at the joint between the toroidal-type continuously variable transmission and the planetary gear type transmission and the improvement of the lubricity of the radial needle bearing incorporated in the planetary gear type transmission. .
[0002]
[Prior art]
The use of a toroidal continuously variable transmission as an automatic transmission for automobiles has been studied and implemented in part. In addition, as described in Patent Documents 1 to 7, it has been conventionally proposed to configure a continuously variable transmission by combining a toroidal type continuously variable transmission and a planetary gear type transmission. FIG. 4 shows the continuously variable transmission described in Patent Document 2 among them. This continuously variable transmission is formed by combining a toroidal type continuously variable transmission 1 and a planetary gear type transmission 2. Of these, the toroidal continuously variable transmission 1 includes an input shaft 3, a pair of input side disks 4, 4, an output side disk 5, and a plurality of power rollers 6, 6.
[0003]
The planetary gear type transmission 2 includes a carrier 7 coupled and fixed to the input shaft 3 and one input side disk 4 (right side in FIG. 4). A first transmission shaft 10 in which planetary gears 8 and 9 are fixed to both ends of the carrier 7 in a radial intermediate portion is rotatably supported. Further, a second transmission shaft 13 having sun gears 11 and 12 fixed to both ends thereof is supported on the opposite side of the input shaft 3 with the carrier 7 interposed therebetween, and is concentrically supported by the input shaft 3 and is rotatably supported. is doing. The planetary gears 8 and 9 and the sun fixed to the distal end portion (the right end portion in FIG. 4) of the hollow rotary shaft 14 whose base end portion (the left end portion in FIG. 4) is coupled to the output side disk 5. The gear 15 or the sun gear 11 fixed to one end (the left end in FIG. 4) of the second transmission shaft 13 is engaged with each other. Further, one (left side in FIG. 4) planetary gear 8 is meshed with a ring gear 17 rotatably provided around the carrier 7 via another planetary gear 16.
[0004]
On the other hand, planetary gears 19 and 20 are rotatably supported on a second carrier 18 provided around the sun gear 12 fixed to the other end portion (the right end portion in FIG. 4) of the second transmission shaft 13. ing. The second carrier 18 is fixed to the base end portion (left end portion in FIG. 4) of the output shaft 21 disposed concentrically with the input shaft 3 and the second transmission shaft 13. The planetary gears 19 and 20 mesh with each other, and one planetary gear 19 is provided on the sun gear 12 and the other planetary gear 20 is rotatably provided around the second carrier 18. The two ring gears 22 mesh with each other. The ring gear 17 and the second carrier 18 can be freely engaged and disengaged by a low speed clutch 23, and the second ring gear 22 and a fixed part such as a housing are engaged by a high speed clutch 24. It is considered to be removable.
[0005]
In the case of the continuously variable transmission shown in FIG. 4 as described above, in the so-called low speed mode state in which the low speed clutch 23 is connected and the high speed clutch 24 is disconnected, the power of the input shaft 3 is reduced. This is transmitted to the output shaft 21 via the ring gear 17. By changing the gear ratio of the toroidal continuously variable transmission 1, the gear ratio of the continuously variable transmission, that is, the gear ratio between the input shaft 3 and the output shaft 21 changes. In such a low speed mode state, the speed ratio of the continuously variable transmission as a whole changes to infinity. That is, by adjusting the gear ratio of the toroidal-type continuously variable transmission 1, the rotation state of the output shaft 21 with the input shaft 3 rotated in one direction is changed between the forward rotation and the rotation state. , Reverse conversion is possible.
[0006]
On the other hand, in the so-called high speed mode state in which the low speed clutch 23 is disconnected and the high speed clutch 24 is connected, the power of the input shaft 3 causes the first and second transmission shafts 10 and 13 to be connected. Via the output shaft 21. And the gear ratio as the whole continuously variable transmission changes by changing the gear ratio of the toroidal type continuously variable transmission 1. In this case, the greater the gear ratio of the toroidal continuously variable transmission 1, the greater the gear ratio of the continuously variable transmission as a whole.
[0007]
[Patent Document 1]
JP-A-6-174033
[Patent Document 2]
JP 2000-220719 A
[Patent Document 3]
JP 2002-139124 A
[Patent Document 4]
US Pat. No. 5,607,372
[Patent Document 5]
US Pat. No. 6,059,658
[Patent Document 6]
US Pat. No. 6,099,431
[Patent Document 7]
US Pat. No. 6,358,178
[0008]
[Description of the invention]
Japanese Patent Application No. 2003-56681 discloses a continuously variable transmission as shown in FIG. The continuously variable transmission shown in FIG. 5 has the same function as that of the conventionally known continuously variable transmission shown in FIG. 4, but the structure of the planetary gear type transmission 2a portion is the same. By devising, the assemblability of the planetary gear type transmission 2a is improved. A pair of planetary gears 25a, 25b, 26a, and 26b are rotatably supported on both side surfaces of the carrier 7a that rotates together with the input shaft 3 and the pair of input side disks 4 and 4, respectively. Then, the planetary gears 25a and 25b supported on the side surfaces of the carrier 7a and the planetary gears 26a and 26b are meshed with each other, and the planetary gears 25a and 26a on the inner diameter side are connected to the output side disk 5 with the base. First and second fixed respectively to the tip end portion (right end portion in FIG. 5) of the hollow rotary shaft 14a joined to the end portion (left end portion in FIG. 5) and one end portion (left end portion in FIG. 5) of the transmission shaft 27. The planetary gears 25b and 26b on the outer diameter side are meshed with the ring gear 30 respectively.
[0009]
On the other hand, the planetary gears 32a and 32b are rotatably supported on the second carrier 18a provided around the third sun gear 31 fixed to the other end portion (the right end portion in FIG. 5) of the transmission shaft 27. ing. The second carrier 18a is fixed to the base end portion (left end portion in FIG. 5) of the output shaft 21a disposed concentrically with the input shaft 3. The planetary gears 32a and 32b mesh with each other, and the planetary gear 32a on the inner diameter side is placed on the third sun gear 31 and the planetary gear 32b on the outer diameter side is placed around the second carrier 18a. The second ring gears 22a that are rotatably provided are meshed with each other. The ring gear 30 and the second carrier 18a can be freely engaged and disengaged by a low speed clutch 23a, and the second ring gear 22a and a fixed part such as a housing are engaged by a high speed clutch 24a. It is considered to be removable.
[0010]
In the case of the improved continuously variable transmission configured as described above, the power of the input shaft 3 causes the ring gear 30 to be driven when the low speed clutch 23a is connected and the high speed clutch 24a is disconnected. Via the output shaft 21a. By changing the gear ratio of the toroidal-type continuously variable transmission 1, the gear ratio of the continuously variable transmission, that is, the gear ratio between the input shaft 3 and the output shaft 21a changes. On the other hand, when the low speed clutch 23a is disconnected and the high speed clutch 24a is connected, the power of the input shaft 3 is applied to the planetary gears 25a, 25b, the ring gear 30, and the planetary gears. It is transmitted to the output shaft 21a through the gears 26a and 26b, the transmission shaft 27, the planetary gears 32a and 32b, and the second carrier 18a. And the gear ratio as the whole continuously variable transmission changes by changing the gear ratio of the toroidal type continuously variable transmission 1.
[0011]
As shown in FIGS. 6 to 7 to be described below, as the planetary gear 25 on the outer diameter side, one having a long axial dimension is used, and this long planetary gear 25 is used as the planetary gears 25a and 26a on the inner diameter side and the ring. The same function can be exhibited even if a structure for meshing with the gear 30a is employed. In this case, the axial dimension of the ring gear 30a having a large diameter can be shortened to reduce the weight of the planetary gear type transmission 2b.
[0012]
The structures shown in FIGS. 4 and 5 described above are fundamental and do not show a specific structure. When actually configuring a continuously variable transmission, a structure for rotatably supporting each part and a structure for supplying lubricating oil (traction oil) to the rotation support part are required. 6 to 7 show an example of a specific structure of the continuously variable transmission considered above in consideration of such points. In this structure, as described above, the planetary gear 25 on the outer diameter side having a long axial dimension is used, and the long planetary gear 25 is used as the planetary gears 25a and 26a and the ring gear 30a on the inner diameter side. Meshing.
[0013]
A pair of struts 34 and 34 each having an annular portion at each intermediate portion are supported and fixed via a connecting plate 35 and a valve body 36 at predetermined positions in the housing 33. A control valve device for adjusting the transmission ratio of the toroidal type continuously variable transmission 1 is incorporated in the valve body 36. Further, support plates 37, 37 for supporting both ends of the trunnion supporting the power rollers 6, 6 (see FIG. 4) so as to swing and displace in the axial direction are provided at both ends of each of the columns 34, 34. Support. Further, the output side disk 5 is rotatably supported by a pair of rolling bearings 38 between the annular portions provided at the intermediate portions of the support columns 34. Further, the base half (the left half in FIG. 6) of the hollow rotary shaft 14a is coupled to the inner diameter side of the output side disk 5 based on spline engagement so as to be able to transmit the rotation.
[0014]
The input shaft 3a is inserted inside the hollow rotary shaft 14a. One input side disk 4a (left side in FIG. 6) is supported via a ball spline 39 near the base end of the input shaft 3a, and the input side disk 4a is supported by a hydraulic pressing device 40. The output side disk 5 can be pressed freely. On the other hand, the other input side disk 4b (on the right side in FIG. 6) is rotated and axially moved by a radial needle bearing 41 around the middle tip end (right side in FIG. 6) of the hollow rotary shaft 14a. Supports displaceability. The other input side disk 4b and the input shaft 3a are coupled via a carrier 7a. Accordingly, the pair of input side disks 4a and 4b provided at the positions sandwiching the output side disk 5 from both sides in the axial direction rotate synchronously via the input shaft 3a and the carrier 7a.
[0015]
The carrier 7a has a plurality of (for example, three) each between an intermediate support plate 42 having an L-shaped cross section and an annular shape as a whole and a pair of connecting plates 43a and 43b each formed in an annular shape. ) Planet shafts 44a, 44b and 44c. The planetary gears 25a, 26a, and 25 are rotatably supported around the planetary shafts 44a, 44b, and 44c through radial needle bearings 45a, 45b, and 45c, respectively. Then, the planetary gear 25 on the outer diameter side and the planetary gears 25a and 26a on the inner diameter side are meshed with each other, and the planetary gears 25a and 26a on the inner diameter side are connected to the tip of the hollow rotary shaft 14a (the right end in FIG. 6). The planetary gear 25 on the outer diameter side is meshed with the ring gear 30a, respectively, with the first sun gear 28 fixed to the first part) or the second sun gear 29 fixed to the base end part of the transmission shaft 27. .
[0016]
The oil passages 46a, 46b, 46c are provided at the center of the planetary shafts 44a, 44b, 44c, and the oil passages 46a, 46b, 46c and the planetary shafts 44a, 44b, 44c are provided at the center in the axial direction. Nozzle holes 47a, 47b, and 47c are provided respectively through the outer peripheral surface of the nozzle. The oil passages 46a and 46b formed at the center of the planetary shafts 44a and 44b on the inner diameter side communicate with each other by facing each other at the fitting support portion with respect to the intermediate support plate 42. Further, an oil supply passage 48 formed at the center of the input shaft 3a and the oil passages 46b and 46c are connected to the tip end portion (the right end portion in FIG. 6) of the input shaft 3a and the second sun gear 29. The oil supply holes 49 and 50 formed in the base end part and the oil supply passages 51 and 51 formed in the connecting plate 43b communicate with each other.
[0017]
A cylindrical portion 52 provided at the center of the intermediate support plate 42 is spline-engaged with a portion near the tip of the intermediate portion of the input shaft 3 a and is held down by a loading nut 53. The loading nut 53 enters the center hole 54 of the second sun gear 29, and a labyrinth seal is formed between the outer peripheral surface of the loading nut 53 and the inner peripheral surface of the center hole 54. . Accordingly, the lubricating oil discharged from the oil supply hole 49 at the distal end of the input shaft 3a to the inner part of the center hole 54 passes through the oil supply holes 50, 50 formed at the base end of the second sun gear 29, and Effectively guided to the oil supply passages 51, 51 formed in the support plate 43b. Although not shown, the annular portion 55 of the intermediate support plate 42 and the connection plates 43a and 43b are connected to the planetary gears. 25, 25a, 26a Are connected to each other by a connecting portion provided at a position deviated from the circumferential direction. This configuration ensures the strength and rigidity of the carrier 7a with respect to the force in the direction of rotation transmission.
[0018]
Further, in order to transmit the rotation between the other input side disk 4b and the carrier 7a, convex portions 56 formed at a plurality of locations on the outer side surface of the input side disk 4b and the outer peripheral edge of the connecting plate 43a. A notch 57 formed in the portion is engaged. Further, lubricating oil is supplied to the abutting portion between the connecting plate 43a and the outer side surface of the input side disk 4b to prevent fretting wear of the abutting portion. For this purpose, the lubricating oil in the oil supply passage 48 provided in the center of the input shaft 3a is formed in the oil supply hole 58 formed in the intermediate portion of the input shaft 3a and the portion near the tip of the intermediate portion of the hollow rotary shaft 14a. Through the refueling hole 59, it can be fed into the butt portion.
[0019]
During operation of the continuously variable transmission shown in FIGS. 6 to 7 as described above, the input shaft 3a is rotationally driven by the drive shaft 60. At the same time, hydraulic pressure is introduced into the pressing device 40, and the surface of the rolling contact portion (traction portion) between the side surface of each of the input side disks 4a, 4b and output side disk 5 and the peripheral surface of each of the power rollers 6,6. Ensure pressure. Also, by feeding the lubricating oil into the oil supply passage 48 and supplying the lubricating oil to the rotation support portions and the butting portions such as the radial needle bearings 45a to 45c, the respective portions are lubricated and cooled, These parts are prevented from being damaged such as wear and seizure.
[0020]
[Problems to be solved by the invention]
In the case of the continuously variable transmission according to the present invention configured as described above and acting as described above, the lubrication of the radial needle bearing 45a supporting the planetary gear 25a on the inner diameter side near the input side disk 4b and the connection of the carrier 7a. Lubrication of the abutting portion between the plate 43a and the outer surface of the input side disk 4b cannot always be sufficiently achieved. The reason for this is that if the amount of lubricating oil flowing through the radial needle bearing 45a is increased, the lubricating oil discharged to the inner diameter side of the connecting plate 43a from the oil supply hole 59 formed near the tip of the intermediate portion of the hollow rotating shaft 14a. However, it is not necessarily effectively used for lubrication of the butt portion. This point will be described below.
[0021]
Since the radial needle bearing 45a rotates at a high speed during operation of the continuously variable transmission, it is necessary to increase the amount of lubricating oil passing through the radial needle bearing 45a in order to prevent damage. In order to increase this amount, it is necessary to reduce the back pressure against the feeding of the lubricating oil from the oil passage 46a formed at the center of the planetary shaft 44a. Further, in order to reduce the back pressure, it is necessary to keep the thrust washer 61 sandwiched between the end face of the planetary gear 25a and the side face of the connecting plate 43a from becoming a resistance to the flow of the lubricating oil. is there. A plurality of concave grooves 62, 62 are formed on the side surface of the thrust washer 61 in the radial direction as shown in an example of the embodiment of the present invention. The number of the concave grooves 62, 62 can be increased. If the cross-sectional area determined by the width and depth of each of the concave grooves 62 and 62 is increased, the resistance can be kept low. And the quantity of the lubricating oil which passes the said radial needle bearing 45a can be increased.
[0022]
However, when the amount of the lubricating oil passing through the radial needle bearing 45a is increased in this way, the amount of the lubricating oil fed into the butt portion is likely to be insufficient. This is because most of the lubricating oil discharged from the oil supply hole 59 to the inner diameter side of the connecting plate 43a flows through the concave grooves 62 and 62 without passing through the butted portion. . That is, the lubricating oil discharged from the oil supply hole 59 to the inner diameter side of the connecting plate 43a passes through the abutting portion or between the connecting plate 43a and the end face of the planetary gear 25a. It is discharged to the outside in the radial direction of the plate 43a. At this time, since the lubricating oil tends to flow through a portion having a small resistance, the number of the concave grooves 62 and 62 is increased or the cross-sectional area is widened, so that the gap between the connecting plate 43a and the end face of the planetary gear 25a is increased. When the resistance is reduced, the amount of lubricating oil passing through the butt portion is reduced.
[0023]
The lubricating oil discharged from the oil supply hole 59 to the inner diameter side of the connecting plate 43a passes through the concave grooves 62, 62, and is also a gap existing between the planetary gear 25a and the carrier 7a. However, in the case of the structure shown in FIGS. 6 to 7, it is necessary to make the flow path other than the butted portion as narrow as possible from the aspect of preventing the fretting wear of the butted portion. However, the flow path other than the abutting portion cannot always be sufficiently narrow.
Considering these things, it is desired to realize a structure that can increase the amount of lubricating oil that passes through the radial needle bearing 45a while securing the amount of lubricating oil that passes through the abutting portion.
The continuously variable transmission of the present invention has been invented in view of such circumstances.
[0024]
[Means for Solving the Problems]
The continuously variable transmission of the present invention includes an input shaft, an output shaft, a toroidal continuously variable transmission, and a planetary gear type transmission.
The toroidal type continuously variable transmission and the planetary gear type transmission are configured such that the input side disk constituting the toroidal type continuously variable transmission and the carrier constituting the planetary gear type transmission are opposed to each other, and these input side The disk and the carrier are combined in a state of rotating in synchronization.
A planetary gear is rotatably supported around a planetary shaft provided on the carrier via a radial needle bearing.
Further, an oil supply passage is provided for feeding lubricating oil to the radial needle bearing, and the lubricating oil fed from the oil supply passage to the radial needle bearing is further passed between the opposed surfaces of the input side disk and the carrier. It can be sent in between.
[0025]
[Action]
In the case of the continuously variable transmission according to the present invention configured as described above, the lubricating oil fed to the radial needle bearing is further fed between the opposed surfaces of the input side disk and the carrier. The amount of lubricating oil passing through the radial needle bearing can be increased while securing the amount of lubricating oil passing through the butted portion.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an example of an embodiment of the present invention. The feature of this example is that the radial needle bearing 45a that supports the planetary gear 25a on the inner diameter side near the input side disk 4b, and the abutting portion between the connecting plate 43a of the carrier 7a and the outer surface of the input side disk 4b. In order to achieve both of the above-described lubrication, a part of the lubricating oil that has passed through the radial needle bearing 45a is sent to the butt portion. Since the structure and operation of the other parts are the same as those of the structure according to the prior invention shown in FIGS. 6 to 7 described above, the illustration and description of the equivalent parts are omitted or simplified. The explanation is centered.
[0027]
Circular holes 63 are formed in a plurality of places in the circumferential direction of the connecting plate 43a (for example, three places at equal intervals in the circumferential direction) so as to penetrate in the axial direction. Then, one end portion in the axial direction of the planetary shaft 44a (left end portion in FIG. 1) for supporting the planetary gear 25a is fitted and fixed in each circular hole 63 by interference fitting. One to a plurality of (1 in the illustrated example) notches 64 are formed on the inner peripheral edge of each circular hole 63 so that both surfaces of the connecting plate 43a are in communication with each other. The notch 64 is not closed even when the end of the planetary shaft 44a is fitted and fixed to the circular hole 63, and is not closed from the inner surface (the surface on the planetary gear 25a side) of the connecting plate 43a. It functions as an oil supply passage for supplying lubricating oil to the input side disk 4b side surface. For this reason, a part of the lubricating oil fed into the radial needle bearing 45a through the nozzle hole 47a from the oil passage 46a provided at the center of the planetary shaft 44a is outside the connecting plate 43a and the input side disk 4b. It is sent to the butting part with the side.
[0028]
Further, in the case of this example, a thrust washer 61 is provided between the inner side surface (one side surface) of the connecting plate 43a and the end surface of the planetary gear 25a. A plurality of (four in the illustrated example) concave grooves 62, 62 are formed in the radial direction on the side face of the thrust washer 61 facing the planetary gear 25a. In addition, second notches 65 and 65 are formed at a plurality of locations (four locations in the illustrated example) on the inner peripheral edge of the thrust washer 61. The phase in the circumferential direction between each of the second cutouts 65 and 65 and each of the concave grooves 62 and 62 is actually different as shown in FIG. It is drawn as it is. Further, a groove 66 is formed over the entire circumference so as to surround the end of the planetary shaft 44a on the inner surface of the connecting plate 43a. A part of the lubricating oil fed to the radial needle bearing 45a is passed through the second notches 65, 65, the concave groove 66, and the notch 64, and the connecting plate 43a and the input side disk. 4b can be fed into the abutting portion with the outer surface of 4b. In the case of the present example, by providing the concave groove 66, a part of the lubricating oil fed into the radial needle bearing 45a regardless of the phase of the second notches 65 and 65 and the notch 64. Can be fed into the butt section.
[0029]
In the case of the continuously variable transmission of the present example configured as described above, the lubricating oil fed into the radial needle bearing 45a is further converted into an inner diameter between the opposing surfaces of the input disk 4b and the connecting plate 43a. Can be sent to the side. And the lubricating oil sent to this part forms an oil film in the abutting part of the said opposing surfaces, and prevents that fretting wear arises in this abutting part. Since the lubricating oil used to lubricate the butt portion is lubricated with the radial needle bearing 45a, the lubricating oil passes through the radial needle bearing 45a while securing the amount of lubricating oil passing through the butt portion. The amount of lubricating oil can be increased. That is, by discharging a part of the lubricating oil passing through the radial needle bearing 45a through the abutting portion, the resistance to flowing the lubricating oil through the radial needle bearing 45a is reduced, and the radial needle bearing 45a is lubricated. The amount of oil can be increased. At the same time, the necessary lubricating oil can be efficiently fed into the butt portion.
[0030]
Note that the amount of lubricating oil passing through the radial needle bearing 45a and the abutting portion varies the number and cross-sectional area of the notches 64, the second notches 65 and 65, and the concave grooves 62 and 66. Can be adjusted as appropriate. Further, in the illustrated example, the thrust washer 61 is shown as having a single plate structure (a structure in which only one sheet is provided between the facing surfaces), but a two-sheet structure (a structure in which two sheets are provided between the facing surfaces). ) Can also be adopted. In this case, an iron-based metal having excellent wear resistance is provided on the radial needle bearing 45a side, and a self-lubricating copper-based metal is provided on the connecting plate 43a side. Each is preferably used. However, the two thrust washers are combined so that they cannot rotate relative to each other in a state in which the phases of the second cutouts formed in the respective inner peripheral edge portions are matched. In addition, when implementing this invention, in order to increase the quantity of the lubricating oil sent to the said butt | matching part, it is free to provide the oil supply hole 59 (refer FIGS. 6-7) similar to the previous invention mentioned above.
[0031]
【The invention's effect】
Since the present invention is configured and operates as described above, the lubrication of the radial needle bearing that supports the planetary gear and the prevention of fretting wear at the abutting portion between the carrier and the input side disk are compatible with each other at a high level. A continuously variable transmission having high durability can be realized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view corresponding to the upper right part of FIG. 6 showing an example of an embodiment of the present invention.
FIG. 2 is a perspective view of a thrust washer.
FIG. 3 is a partial perspective view of a connecting plate constituting a carrier.
FIG. 4 is a schematic cross-sectional view showing an example of a conventionally known continuously variable transmission.
FIG. 5 is a schematic cross-sectional view showing an example of a continuously variable transmission according to the present invention.
FIG. 6 is a partial cross-sectional view showing an example of a specific structure previously considered.
7 is an enlarged view of the upper right part of FIG.
[Explanation of symbols]
1 Toroidal continuously variable transmission
2, 2a, 2b Planetary gear type transmission
3, 3a Input shaft
4, 4a, 4b Input side disk
5 Output disk
6 Power roller
7, 7a Career
8 Planetary gear
9 Planetary gear
10 First transmission shaft
11 Sun gear
12 Sun gear
13 Second transmission shaft
14, 14a Hollow rotating shaft
15 Sun gear
16 Planetary gear
17 Ring gear
18, 18a Second carrier
19 Planetary gear
20 planetary gears
21, 21a Output shaft
22, 22a Second ring gear
23, 23a Low speed clutch
24, 24a High speed clutch
25, 25a, 25b Planetary gear
26a, 26b planetary gear
27 Transmission shaft
28 The first sun gear
29 Second Sun Gear
30, 30a Ring gear
31 Third sun gear
32a, 32b Planetary gear
33 Housing
34 prop
35 connecting plate
36 Valve body
37 Support plate
38 Rolling bearings
39 Ball spline
40 Pressing device
41 Radial needle bearings
42 Intermediate support plate
43a, 43b connecting plate
44a, 44b, 44c Planetary axis
45a, 45b, 45c Radial needle bearings
46a, 46b, 46c Oil passage
47a, 47b, 47c Nozzle hole
48 Refueling route
49 Refueling hole
50 Refueling hole
51 Refueling route
52 Cylindrical part
53 Loading nut
54 Center hole
55 torus
56 Convex
57 Notch
58 Refueling hole
59 Refueling hole
60 Drive shaft
61 Thrust Washer
62 Groove
63 hole
64 cutout
65 Second cutout
66 Groove

Claims (3)

入力軸と、出力軸と、トロイダル型無段変速機と、遊星歯車式変速機とを備え、これらトロイダル型無段変速機と遊星歯車式変速機とは、トロイダル型無段変速機を構成する入力側ディスクと遊星歯車式変速機を構成するキャリアとを互いに対向させると共に、これら入力側ディスクとキャリアとが同期して回転する状態に組み合わされており、このキャリアに設けた遊星軸の周囲に遊星歯車が、ラジアルニードル軸受を介して回転自在に支持されており、このラジアルニードル軸受に潤滑油を送り込む為の給油通路が設けられており、この給油通路からこのラジアルニードル軸受に送り込まれた潤滑油を、更に上記入力側ディスクと上記キャリアとの対向面同士の間に送り込み自在とした無段変速装置。An input shaft, an output shaft, a toroidal type continuously variable transmission, and a planetary gear type transmission are provided, and these toroidal type continuously variable transmission and planetary gear type transmission constitute a toroidal type continuously variable transmission. The input side disk and the carrier constituting the planetary gear type transmission are opposed to each other, and the input side disk and the carrier are combined in a state of rotating in synchronization with each other, around the planetary shaft provided on the carrier. The planetary gear is rotatably supported via a radial needle bearing, and an oil supply passage is provided for feeding lubricating oil to the radial needle bearing. The lubrication sent from the oil supply passage to the radial needle bearing A continuously variable transmission that allows oil to be further fed between opposing surfaces of the input side disk and the carrier. キャリアを構成して遊星軸の端部を支持固定する連結板と入力側ディスクの外側面とを互いに対向させ、この連結板を軸方向に貫通する状態で形成した円孔に上記遊星軸の端部を嵌合固定し、この円孔の内周縁に形成した切り欠きを通じて、ラジアルニードル軸受に送り込まれた潤滑油を、更に上記入力側ディスク外側面と上記連結板の他側面との間に送り込み自在とした、請求項1に記載した無段変速装置。The end of the planetary shaft is formed in a circular hole formed in such a manner that the connecting plate that constitutes a carrier and supports and fixes the end of the planetary shaft and the outer surface of the input disk face each other and penetrates the connecting plate in the axial direction. The lubricating oil fed into the radial needle bearing is further fed between the outer side surface of the input side disk and the other side surface of the connecting plate through a notch formed in the inner peripheral edge of the circular hole. The continuously variable transmission according to claim 1, wherein the continuously variable transmission is free. 連結板の片側面と遊星軸の周囲に設けられた遊星歯車の端面との間にスラストワッシャを設け、このスラストワッシャの内周縁に形成した第二の切り欠きと、上記連結板の片側面で上記遊星軸の端部を囲む部分に形成した凹溝と、円孔の内周縁に形成した切り欠きとを通じて、ラジアルニードル軸受に送り込まれた潤滑油を、更に上記入力側ディスク外側面と上記連結板の他側面との間に送り込み自在とした、請求項2に記載した無段変速装置。A thrust washer is provided between one side of the connecting plate and the end face of the planetary gear provided around the planetary shaft, and a second notch formed on the inner peripheral edge of the thrust washer, and one side of the connecting plate Lubricating oil fed to the radial needle bearing is further connected to the input-side disk outer surface through the concave groove formed in the portion surrounding the end of the planetary shaft and the notch formed in the inner peripheral edge of the circular hole. The continuously variable transmission according to claim 2, wherein the continuously variable transmission can be freely fed between the other side surfaces of the plate.
JP2003104447A 2003-04-08 2003-04-08 Continuously variable transmission Expired - Fee Related JP4232514B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN102536450A (en) * 2010-11-24 2012-07-04 谢夫勒科技有限两合公司 Intermediate gear device

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JP4731161B2 (en) * 2004-12-27 2011-07-20 ダイハツ工業株式会社 Planetary gear set
JP2006242314A (en) * 2005-03-04 2006-09-14 Nsk Ltd Toroidal continuously variable transmission
JP2007040334A (en) * 2005-08-01 2007-02-15 Nsk Ltd Needle roller bearing
JP4867931B2 (en) * 2008-02-21 2012-02-01 日本精工株式会社 Continuously variable transmission
JP5257336B2 (en) * 2009-11-25 2013-08-07 日本精工株式会社 Continuously variable transmission
KR101231882B1 (en) * 2010-10-12 2013-02-08 현대 파워텍 주식회사 Lubrication device for automatic transmission
JP2019196821A (en) * 2018-05-10 2019-11-14 本田技研工業株式会社 Planetary gear mechanism

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Publication number Priority date Publication date Assignee Title
CN102536450A (en) * 2010-11-24 2012-07-04 谢夫勒科技有限两合公司 Intermediate gear device
CN102536450B (en) * 2010-11-24 2015-11-25 舍弗勒技术股份两合公司 Intermediate gear device

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