JP4338238B2

JP4338238B2 - High load transmission for transmission

Info

Publication number: JP4338238B2
Application number: JP25744898A
Authority: JP
Inventors: 謙吉小野木
Original assignee: 東京自動機工株式会社
Priority date: 1998-08-08
Filing date: 1998-08-08
Publication date: 2009-10-07
Anticipated expiration: 2018-08-08
Also published as: JP2000055135A

Description

【０００１】
【発明の属する技術分野】
本発明は、動力伝動用のベルト伝達体であって、例えばプーリ車からの耐側圧性に優れた高負荷伝動用の無端伝達体に関する。特に、工作機械などの産業機械、車両、モータ等に設置される無段変速機で定馬力の動力伝達に最適な伝達体に関する。
【０００２】
【従来の技術】
無端伝達体として、無端ストラップに多数のリンクまたはブロックを配列支持する構造の先行技術は、既に数多く考案されている。日本特許出願の特開昭２−２７５１４５号（本田技研工業）は無端ストラップに形状記憶合金を用いて多数の金属ブロックの組付方法を改良した思想である。また日本特許出願の特開昭６−１０９０７７号（リケン）は隣接する各ブロック間の動きを抑制してスチールのストラップとブロックとの干渉を抑制したものである。更に日本特許出願の特開昭４−２１９５４８号（仏国カウチユ社）は、無端コアの合成ゴム・ベルトに多数のＵ字型リンクを組込んだ無端伝達体が開示されている。
【０００３】
これ等のベルト伝達体は、その幅（Ｘ）方向にプーリ挾持圧を受ける位置として左右端のそれぞれに受圧部が施されている点で共通するが、この受圧部で受ける幅（Ｘ）方向のプーリ挾持圧に対する圧力吸収方法がいずれも不完全かつ不充分である。特に無段変速機に適用する場合には外部からプーリ車を経てベルト伝達体に印加され、プーリ挾持圧は、負荷動力の大きさ、変速信号の有無および速度など各種の外的要因でその大きさおよび速度が大きく変動する。このため或る時には挾持圧は緩やかに印加されるが、他の或る時には、瞬時にしかも極度に大きな力で印加される。この場合に、いかなる大きさおよびいかなる速度のプーリ挾持圧が印加されても、ベルト伝達体がこれを瞬時に吸収しかつプーリ車の摩擦面およびベルト伝達体の双方に損傷を与えることがなく、安定な動力伝達状態に復帰させる必要がある。
【０００４】
従来技術のうち初めの二つの先行技術では、ブロック自体が金属等の剛体であってプーリ挾持圧が印加される幅（Ｘ）方向の荷重に対して全く弾性が存在しない。従ってその荷重に対する弾性吸収能力も全く存在しない。カウチユ社の開示思想は、Ｕ字型リンクの開放端部分が僅かに幅（Ｘ）方向に可撓性を有し、多少の弾性吸収力の存在が認められる。しかし無端コアに合成ゴム・ベルトが使われているため、充分な大きさのプーリ挾持圧に耐えられない。しかもその印加時に各リンクの位置決め状態が不安定になり、各リンクの配列状態の抑制力が働かないため、瞬時に過大圧力に対して伝動動作が不安定である。
【０００５】
【発明が解決しようとする課題】
本発明の変速機の高負荷伝達体は、如何なる大きさでかつ如何なる速度のプーリ挾持圧がプーリ車を介してベルト伝達体に印加される場合であっても、ベルト伝達体自体が、その幅（Ｘ）方向に充分な弾性力による荷重吸収能力を保証するため、単に各ブロック自体が個別に充分な弾性吸収能力を持つ構造にすることである。更にまた幅（Ｘ）方向の荷重を長手（Ｙ）方向の荷重に変換する機能を持たせることによって、長手（Ｙ）方向に隣接する他の複数のブロックに順次その荷重の分散吸収機能を達成させることである。
【０００６】
即ち、本発明の第一解決課題は、各ブロックが、プーリ挾持圧の非印加時には隣接ブロックと面接触しながら動力伝達するが、プーリ挾持圧の印加時には幅（Ｘ）方向の荷重を長手（Ｙ）方向の荷重に変換させるため隣接ブロックと共働してクサビ効果を達成するような弾性突出部を保持する高負荷伝達体を提供する。更にまた、各ブロックが、プーリ挾持圧の非印加時にも、また印加時にも長手（Ｙ）方向に突出成形した弾性突出部のクサビ効果によって動力伝動中に過大荷重を受圧しながら安定支持状態を保証する高負荷伝達体を提供することである。
【０００７】
本発明の第二解決課題は、各ブロックの弾性突出部が単に長手（Ｙ）方向のクサビ効果による弾性吸収性だけでなく、合成樹脂製のベルトがもつ弾性屈曲性と同等の特性を持たせるため、プーリ回転中心Ｃ０を中心とした正転時とＣ０を中心としない逆転時の屈曲方向の屈曲性に対しても充分な弾性吸収性を保証する高負荷伝達体の思想を提供している。
【０００８】
本発明の第三解決課題は、特にプーリ挾持圧の印加時には、各ブロックが隣接ブロックとの間でクサビ効果を働かせながら、二つの受圧部Ａ１，Ａ２と弾性突出部の先端当接部Ｃとの間で実質的な三点支持構造を維持するので、安定伝動状態を維持したまま更に大きなプーリ挾持圧にも充分に耐性をもつ高負荷伝達体を提供する。
【０００９】
本発明の第四解決課題は、各ブロックが弾性突出部で挾持圧を幅方向の伸縮変位を長手方向に伸縮変位に応力変換すると共に長手方向に印加される直進押込荷重を後方から弾性突出部に供給する事で両受圧部への充分な摩擦圧力の供給を保証する事である。
【０００１０】
【課題を解決するための手段】
本発明の第一解決手段の高負荷伝達体は、長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、上記ブロックは、該プーリ挾持圧の大きさに応じて幅（Ｘ）方向に伸縮自在に配置された上記両受圧部と、この受圧部に連なり幅（Ｘ）方向に該狭持圧を伝えかつ長手（Ｙ）直進方向に垂直の平面に配置され隣接ブロックと互に密接当接し該直進押込荷重を受けて動力伝達するための上記平面部と、さらに上記両受圧部の間に配置され該両受圧部間を結ぶ幅方向と垂直の長手（Ｙ）方向に向け断面形状がクサビ状または舌状に突出成形されて上記両受圧部間が幅方向の弾性力をもって撓むことを保証する為の弾性屈曲性を持つ弾性突出部とを有すると共に、直進押込伝動時には前後の隣接ブロックと上記平面部および上記弾性突出部で夫々面接触および上記ブロックの位置決めをして動力伝達しプーリ加圧摩擦伝動時には該プーリ挟持圧を上記弾性突出部の長手方向の弾性傾斜部の弾性応力に変換して弾性吸収したものである。
【００１１】
本発明の第二解決手段の高負荷伝達体は、長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、上記ブロックは、該プーリ挾持圧の大きさに応じて幅（Ｘ）方向に伸縮自在に配置された上記両受圧部と、この受圧部に連なり幅（Ｘ）方向に該狭持圧を伝えかつ長手（Ｙ）直進方向に垂直の平面に配置され隣接ブロックと互に密接当接し該直進押込荷重を受けて動力伝達するための上記平面部と、さらに上記両受圧部の間に配置され該両受圧部間を結ぶ幅方向と垂直の長手（Ｙ）方向およびラジアル（Ｚ）方向に向け突出成形されて上記両受圧部間に幅方向の弾性屈曲性を保証する弾性突出部とを有すると共に、上記弾性突出部はＸＹおよびＸＺ平面の各断面形状がクサビ状または舌状で長手方向およびラジアル方向に立体的な弾性傾斜部を形成してプーリ挾持圧を長手方向およびラジアル方向の弾性応力に変換して弾性吸収したものである。
【００１２】
本発明の第三解決手段の高負荷伝達体は、長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、上記各ブロックは、該挾持圧により幅方向に伸縮変位可能な上記両受圧部と、該挾持圧を上記両受圧部から弾性突出部に伝える二つの上記平面部と、更に上記両受圧部間に配される上記平面部から幅方向と垂直の長手方向に断面形状がクサビ状又は舌状に突出成形された単一または複数の上記弾性突出部とを有すると共に、該挾持圧による上記両受圧部の幅方向の伸縮変位を長手方向の伸縮変位に応力変換して後方の隣接ブロックに当接加圧される上記弾性突出部の先端当接部と上記両受圧部との間の三点支持構造で安定保持する事で上記各ブロックの上記平面部がプーリ回転軸芯を中心に速比に応じてラジアル方向に等角度で常時正規の配列を維持して安定伝動させたものである。
【００１３】
本発明の第四解決手段の高負荷伝達体は、長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、上記各ブロックは、該挾持圧により幅方向に伸縮変位可能な上記両受圧部と、該挟持圧を上記両受圧部から弾性突出部に伝える二つの上記平面部と、更に上記両受圧部間に配される上記平面部から幅方向と垂直の長手方向に断面形状がクサビ状又は舌状に突出成形され且つ上記弾性突出部の突出成形の方向を上記伝達体の長手進行方向の後方に向って突出成形された単一または複数の上記弾性突出部とを有すると共に、該挟持圧による上記両受圧部の幅方向の伸縮変位を長手方向の伸縮変位に応力変換された上記弾性突出部の先端当接部を更に後方で当接する隣接ブロックからの長手方向の直進押込荷重によって逆方向から押込加圧する事で動力伝動したものである。
【００１４】
【発明の実施の形態】
変速機では、ベルト伝達体の動作は、図１に示す通り定速比運転時にはプーリ車とベルト伝達体との摩擦接触面の全体に分布してプーリ挾持圧を受け接触点Ａで離れているが、変速動作の開始時にはベルト伝達体の接触半径ｒが一端から変動し始めるため、その時の終点で最短接触半径r ｍｉｎの接触点Ａ′がＡ″に瞬時に移動しプーリ挾持圧の全圧がそこに集中しベルトとプーリに機械的損傷を招来する。その瞬間だけベルトの屈曲状態は図１の破線の軌道Ｍ″の様に正転から逆転状態に変わりこの現象はプーリ車に変速指令が供給される度ごとに招来する。
【００１５】
この時に伝達体が、プーリ挾持圧を完全に吸収するだけの充分な弾性力による荷重吸収機能を持つためには、単一ないし数個のブロックだけでは充分な荷重吸収能力に欠けるため、弾性突出部が幅（Ｘ）方向の伸縮変位を長手（Ｙ）方向の伸縮変位に変換して、それ等のブロックに隣接する近隣ブロックに順次集中荷重を長手（Ｙ）方向にも分散させたものである。従って、この事は、変速比を急速に短時間で変化させる時にプーリ車および伝達体に集中荷重が一箇所に集中することが無く、瞬時に多数ブロックに分散することになるので、変形、外傷、その他の伝達不良を招くことなく、高速応答性、制御性の変速比の移行が可能になる。
【００１６】
本明細書では、主に油層内で使う湿式変速機用として記述したが、空気中で使う乾式の場合にも適用できる。従って本実施例では無端ストラップおよびブロックも主に金属剛体を前提としているが、これに限られず、ブロックを金属製と樹脂製とで交互配列しても良く、或いは金属材の表面に樹脂コーティング又は金属材の積層に成形しても良く、更には全てを樹脂材のみで加工しても良い。
【００１７】
また更に本明細書に示した各ブロックに施している弾性突出部の突出成形の方向は、いずれもベルト伝達体の進行方向（回転方向）の後方に向って突出成形し変換した分散吸収荷重が直進押込荷重と互に逆方向に向った例を開示したが、逆に進行方向の前方に向って突出させても良い。また、クサビ状突出部の突出形状に関しても、本実施例では、Ｖ形、台形ないし三角形或いは円弧状又は楕円錐状のものを示したが、クサビ効果により幅（Ｘ）方向荷重が長手（Ｙ）方向荷重に変換し、隣接ブロックの内外壁が弾性力を保持しながら互に食込み侵入してかつ押圧するならば、立体形の錐状、平板を成形したＵ形や舌状等の如何なる形状でも良い。
【００１８】
【第１実施例】
図１は本発明の第１実施例の変速機用の無端高負荷伝達体の一部分の装着状態を示す部分側面図である。同図中では伝達体の左側がプーリ挾持圧の非印加時に後方から直進押込荷重を受ける直進押込伝動状態Ｐを、また右側が伝達車１からプーリ挾持圧が印加され回転中心Ｃ０を中心に半径Ｒ０の角度(θ)の正転方向に折曲したプーリ加圧摩擦伝動状態Ｑをそれぞれ示し、両者は連なったまま単一の無端伝達体１０を形成する。なお作図の便宜上、無端伝達体１０の全体は省略し、一部分のみを描写する。
【００１９】
伝達体１０は、帯状をした無端保持体１１と、この保持体１１上を長手（Ｙ）方向に摺動可能に懸垂状態に吊下げられた多数のブロック１２とを無端の円環状に配列して構成される。伝達体１０は、伝達車１の矢印Ｓで示す回転方向に回動する。このとき、各ブロック１２は、伝達体１により伝達体１０の幅（Ｘ）方向すなわち回転軸芯方向にプーリ挾持圧を受ける受圧部１３，１４と、長手（Ｙ）直進方向Ｐと垂直の平面を前後に配置され隣接ブロックと互いに密接当接して連結状態を維持して動力伝達する平面部１３ａ，１３ｃ；１４ａ，１４ｃ；２０ｆ，２０ｄと、更に後面側にも同じく各ブロック相互間の連結状態により確実な位置決めを施すと同時に幅（Ｘ）方向の弾性力を長手（Ｙ）方向の応力に変換する弾性突出部２０と、で構成される。この時各ブロック１２は弾性突出部２０の上端腕曲切欠部を無端保持体１１で包囲された状態で、ラジアル（Ｚ）方向の遠心力に抗しながら伝動に寄与する。
【００２０】
伝達体１０がプーリ車１の軌道Ｍで等速比伝達中は、摩擦点Ａ，Ｂ，Ｃ，Ｄ，Ｅの半径ＲＡ，ＲＢ，ＲＣ，ＲＤ，ＲＥは全てＲ０でプーリ車１から伝達体１０に印加されるプーリ挾持圧は接触面の全周で略均等に分散加圧されている。しかし変速指令或いは変速機の外部より外乱が侵入したときには、この挾持圧の均等分散状態は次の等速状態に至るまでの一瞬間の間だけ乱れる。伝達体１０が、速比ε０の等速軌道Ｍから次の速比ε１の変速軌道Ｍ′に変更する変速指令が外部から供給された瞬間の伝動状態を分析してみる。この時伝達体１０は引張側の接触点Ａから順にＢないしＥに向って移動し始める。従って移行時の一瞬間の間の接触径ｒは同図の様にｒＡ＜ｒＢ＜ｒＣ…ｒＥの関係に到る。
【００２１】
この事は一瞬間だけ接触点Ａ′の１点に伝動に必要なプーリ挾持圧の全荷重が集中することを意味する。本発明はこの集中荷重を受けても、各ブロック１２は、幅（Ｘ）方向に充分な弾性屈曲性を付与することによって、この瞬時に印加される極度に大きな集中荷重を、これまた瞬時にＡ′点のブロック１２のみが引き受けることなく、順次他の隣接ブロック１２で構成されるＢ′点、Ｃ′点、Ｄ′点、Ｅ′点に荷重分散させて弾性吸収する構造の剛体製伝達体１０を実現したものである。望ましくは、Ａ′点を始点として終点Ｅまでの角度θ０が約４５度乃至１７０度程度まで分散すべきである。
【００２２】
図２は図１に示す第１実施例の高負荷伝達体１０に用いたブロック単体の構成を示し、図２Ａは左側係止具付ブロック１２Ｌの背面図、図２Ｂは同ブロック１２Ｌの上面図さらに図２Ｃは同ブロック１２Ｌの側面図をそれぞれ示す。更に図２Ｄは無端保持体１１に保持された右側係止具付ブロック１２Ｒの背面図を示す。図２Ａにおいて、左側係止具付ブロック１２Ｌは、左側平面部１３ａの上方に無端保持体１１からの脱落を阻止する係止具１７Ｌを施されかつその近傍には平面部１３ａの長手（Ｙ）方向に厚味ｌｍの貫通孔１５が施される。また図２Ｂに示す通り、右側平面部１４ａは平面部１４ａの同じ高さの位置に長手（Ｙ）方向の厚味ｌｍと略同等の長さｌｍの係合突起１６が施される。一方、図２Ｄに示す通り、ブロック１２Ｌとは逆に、係止具１７Ｒおよび貫通孔１５が平面部１４ａに、また係合突起１６が平面部１３ａにそれぞれ施された右側係止具付ブロック１２Ｒも、予め用意される。なお、図２Ｄでは、二つの車１ａ，１ｂからなるプーリ車１と無端保持体１１を同時に示してある。
【００２３】
本実施例では、各ブロック１２Ｌ，１２Ｒは、いずれも二つの受圧部１３，１４の間に平面部１３ａ，１４ａを経て弾性突出部２０が配置され、かつ全体が単一の金属弾性材をもって一体加工されて単一のブロック１２を形成する。また、この例では、弾性突出部２０は、図２Ｂのように弾性材の平板傾斜部２０ａ，２０ａがほぼ直角θ＝９０度に交互するように、伝達体１０の長手（Ｙ）方向に突出し、先端当接部２０ｂを台形に成形される。しかも、図２Ｅに示す通り、受圧部１３，１４の長手（Ｙ）方向の厚味ｌｍは、弾性傾斜部２０ａの厚味ｌｍとの間で傾斜角θの大きさに応じてｌｎ＝ｌｍ×ｓｉｎθ１で決る厚味に選定される。これによって図１で示した直進押込伝動時には、前後に隣接するブロック１２の相互間で受圧部１３，１４の正面および背面の各平面部１３ａ，１３ｃおよび１４ａ，１４ｃが互に密接当接し後方からの直進押込荷重を受けて動力伝動するだけでなく、弾性突出部２０の傾斜部２０ａ，台形部２０ｂの各傾斜平面部２０ｉ，２０ｃおよび台形平面部２０ｆ，２０ｄもこの時、同時に各ブロック間で密接当接状態を確保し、特に台形部２０ｂはもう一つ別の平面部として平面部１３ａ，１３ｃ；１４ａ，１４ｃと同様の直進押込荷重を受けている。
【００２４】
図２Ｃの様に、平面部１３ｃ，１４ｃおよび弾性突出部２０の傾斜部２０ａ並びに台形部２０ｂの正面側は、すべて平面状態だが、背面側は、図２Ａに示したＵ−Ｕ線より上方側を平面部１３ａ，１４ａ，台形平面部２０ｆ，傾斜平面部２０ｉに対して下方側は折曲部１３ｂ，１４ｂ，台形折曲部２０ｇ，傾斜折曲部２０ｈが施されている。これによって、図１で示した伝達体１０が接触半径Ｒ０の加圧摩擦位置に入ったとき、各ブロック１２が伝達車１の回転中心Ｃ０に対して変速比εに応じて決るラジアル（Ｚ）方向に略等角度θ１で位置決め配列できるように構成してある。折曲部は、直線状の傾斜平面としても、また円弧状の腕曲面即ち腕曲部にしてもよく、前者は図４Ｃに示す通り速比εが変化しても同じ折曲点Ｆで当接するが、後者では当接点の位置が速比に応じて変化する。本実施例では折曲部１３ｂ，１４ｂを直線状に、折曲部２０ａ，２０ｂを腕曲状または腕曲部にしてある。この加圧摩擦伝動状態Ｑでは、各ブロック１２の弾性突出部２０が傾斜状態のまま無端ストラップ１１によって安定状態に位置決めされ、速比εに応じて当接させるための腕曲切欠部２０e が弾性突出部２０の上端に施される。
【００２５】
図３は、上述した二種類の左側係止具付ブロック１２Ｌと右側係止具付ブロック１２Ｒとを無端ストラップ保持体１１に組立てる様子を示すブロック組立図である。二つの受圧部１３，１４にそれぞれ貫通穴１５および係合突起１６とが交互に施されているため、隣接ブロックの間では互に係合突起１６が貫通穴１５に挿入された状態で組立てられる。同時に係止具１７Ｌ，１７Ｒも同様に各受圧部１３，１４より交互に突出され、両者の間には挿入空間１９が残される。この挿入空間１９を介して保持隙間１８はストラップ１１の組付空間として使用される。この時、無端保持体１１の全周にブロック１２Ｌ，１２Ｒが配列され、各ブロック１２が保持体１１上を押圧移動できるように、ブロック１２Ｌと１２Ｒとの間に僅かな隙間が残される程度に設置される。
【００２６】
図４Ａおよび４Ｂは、本実施例の高負荷伝達体の図２Ｂの上面図によりその動作を説明するためのブロックの動作説明図であり、同図４Ａはプーリ挾持圧の弾性吸収力の変換原理図であり、同図４Ｂは同挾持圧を受ける前後の弾性突出部２０の変形状態を示す動作図である。説明の便合上、図４Ａに示す様に、二つの受圧部１３，１４を結ぶ、伝達体１０の幅Ｗの方向をＸ軸と、また伝達体１０の長手方向をＹ軸と、さらに図１に示すラジアル方向をＺ軸と、仮定する。
【００２７】
無段変速機では、二つの円錐車１ａ，１ｂの相対距離を変化させ、摩擦圧力を変えて所定の伝達動力を確保するため、伝達体１０には大きさおよび速さが自在に変動するプーリ挾持圧が加えられる。図４Ａのようにこれに応じて各ブロック１２には、受圧部１３，１４の摩擦面ａ１，ａ２にプーリ挾持圧が矢印Ａ，Ａ′の両側面から印加され、平面部１３ａ，１４ａを経て伝達され台形クサビ状又錐形クサビ状に成形された弾性突出部２０の端部ａ′１，ａ′２より所定距離Ｌの位置に板バネ傾斜部Ｂ，Ｂ′を介して先端当接部Ｃの仮想連結点ａ０に向って加圧される。本実施例のブロック１２は、或る程度の移動性を確保するため先端当接部Ｃは台形部２０ｂを施してあるがＶ字形でもよく、実質的な原理動作は同図に示す通り、三つの端部ａ０,ａ１,ａ３によってＸＹ平面上で安定支持状態に維持可能であることを示す。しかもＺ軸方向には無端ストラップ１１で位置決めされているため、実体的にはＸ，ＹおよびＺ軸のいずれの方向に対しても、個々のブロック１２は円錐車１ａ，１ｂ間で傾斜状態のまま伝動することもなく伝動中ほぼ完全な安定位置状態が確保される。
【００２８】
特に本発明の最大の特徴は、二つ存在する。第１の特徴は、伝達車１から加わるプーリ挾持圧が、小さな荷重でかつ緩やかに印加される場合でも、また逆に著しく過大な荷重でかつ瞬時に印加される場合であっても、これを速やかに弾性吸収するだけの充分な弾性吸収力を伝達体１０自体が内在しているため、最高速比εｍａｘから最小速比εｍｉｎに至るまでの変速時間を著しく短期制御できることである。第２の特徴は、仮に少数のブロック１２のみに極度に大きな瞬間荷重が加わっても、この荷重を隣接の他の複数のブロック郡に瞬時に順次分散されることによって、伝達車１及び伝達体１０への機械的損傷を皆無にできることである。
【００２９】
次に図４Ｂによって、本発明によるこれ等の集中荷重を分散する特徴の根拠を説明する。同図において右図（ｉ）は、図４Ａの受圧点ａ１，ａ２からプーリ挾持圧を受けてない状態を示し、左図（ｉｉ）はプーリ挾持圧を受けて、受圧部ａ１,ａ２がｂ１，ｂ２に幅（Ｘ）方向に距離βだけ弾性収縮した状態をそれぞれ示す。
【００３０】
図４Ｂ−（ｉ）では、この時弾性突出部２０の板バネ傾斜部２０ａ，２０ｂの角度θは図２Ｂに示す通り略９０°のままの状態である。しかし一担、伝達車１のプーリ挾持圧を受け始めると、受圧部１３，１４は移動し始め、図４Ｂ−(ｉｉ)に示すように弾性傾斜部２０ａ，２０ｂの双方が応力変形しながら、先端当接点もａ０からｂ０に前進し始め、その移動距離αはｌ０（＝ｌ０２−ｌ０１）になる。本実施例の先端は実際には台形部２０ｂを形成しているため、本ブロック１２の折曲点ａ０１,ａ０２の部分が隣接後方の後ブロック１２に対し、錐状の弾性傾斜部２０ａ，２０ｂのクサビ効果とともに強固な圧力で当接する結果、本ブロック１２はその受圧部１３，１４の受圧点ｂ１，ｂ２と先端当接部ｂ０１,ｂ０２の実質的な先端当接部ｂ０との三点支持効果によって応力変形し強固に支持され弾性吸収されることになる。後ブロック１２も本ブロック１２の先端当接部の圧力とプーリ挟持圧を受け本ブロック１２の圧力分散と略同等の動作を順次行い更に後ブロックに分散する。
【００３１】
更に、図４Ｃは、複数ブロック１２の弾性突出部２０が、挟持圧をベルト内で順次に圧力分散ないし変換機能を達成していることを図示している。即ち、本ブロック１２−１の弾性突出部２０の受圧部１３，１４を経て加わったＸ軸方向のプーリ挾持圧は、クサビ状傾斜部２０ａ,２０ｂの応力変形によって前後に隣接する他のブロック１２-０，１２−１への圧力を変化させるので、ブロック１２−２は折曲点Ｆ２を中心に傾き始めて当接点Ｅを介してＹ軸方向の弾性応力に変換されていることになる。本実施例の伝達体１０が全て金属剛体で製造された場合であっても、合成ゴムなどの樹脂材で製造した可撓性のベルト伝達体とほぼ同等の圧力分散機能を提供していることを意味する。このことは、幅（Ｘ）方向のプーリ挾持圧の大きさが小さく緩やかである場合は、変換後の長手（Ｙ）方向の複数のブロック１２だけでその弾性応力として弾性吸収する。しかし急瞬でかつ過大圧の場合にも、幅（Ｘ）方向の収縮が大きい分だけ瞬時に長手（Ｙ）方向の多数のブロック１２に分散されるので、一部のブロックやプーリ摩擦面が損傷することはない。結果的に最低から最高速比に至る変速時間を短縮しても安定伝動が可能となる。
【００３２】
なお、本実施例の傾斜部２０a の傾斜角度θおよびθ２は必要に応じて変更可能であり、また台形部２０b の形状も実質的に三点支持機能を果たす限り任意に変更可能である。更に上述した本発明の弾性突出部の積層による急峻衝撃荷重による荷重分散に関する技術思想は、次に記述している第２実施例で示す通り、弾性突出部が単一に限らず複数の弾性突出部を有しても良い。
【００３３】
【第２実施例】
図５は本発明の第２実施例の変速機の無端高負荷伝達体を示す。図５Ａは同伝達体のブロック１２を示す正面断面図、図５Ｂは保持体１１とブロック１２を示す側面断面図、図５Ｃは図５Ｂの上面図、さらに図５Ｄはブロック１２に施した保持体１１の挿入用の切開部を示す部分構成図である。本例でも、上述した第１実施例の「幅（Ｘ）方向のプーリ挾持圧を長手（Ｙ）方向の弾性力に変換する」ことで弾性吸収する基本思想を複数でかつ立体的に利用している。しかし更に幾つかの新たな技術思想を開示しているので、その新たな技術思想のみを、第１実施例と比較して項目ごとに説明する。
【００３４】
（１）第一に無端保持体は、帯状ストラップではなく、単線の繊維・鋼線等を円環状にたばねたワイヤロープ状の無端保持体１１で構成した思想である。断面形状は円形でブロック１２の中心に施した貫通孔１８を通じて各ブロック１２が個別に保持体１１上を摺動可能に支持される。（２）第二にブロック１２に施した弾性突出部２０の断面形状が、単なる弾性の平板材による折曲成形体ではなく、包囲部２０ｊ，２０ｋを施すことにより三次元の立体構造として円形またはほぼ半楕円形状に突出している円錐ないし錐状構造の思想である。即ち、図５Ａ，５Ｃの様にＸ―Ｘ線の断面形は、第１実施例の図２Ｂと略同等のＶ字またはＵ字状のクサビ形状を保持し、受圧部Ａ１，Ａ２と仮想連結点ａ０に向う当接部Ｃとの三点支持構およびクサビ効果による挾持圧分散機構は同一構成である。しかし本例では更にＺ軸方向にも仮想の先端当接点Ｄを想定し、二つの弾性傾斜部２０ａ，２０ａはＺ軸の下方（伝達体内周側）に向って傾斜角度θ３のＶ字またはＵ字状の第二のクサビ形状又は舌状突出部を第二のクサビ状突出部として有する。これによって図１に示すように各ブロックは、長手（Ｙ）方向だけでなく、プーリ回転軸芯Ｃ０を中心とした屈曲角度（θ０）方向の屈曲性についても第二のクサビ効果による所定の弾性吸収力を付与したものである。即ち伝達体１０の曲率半径Ｒが小さくなるのに応じて内部弾性力を増大させ、結果的には変速機の外部からプーリ車を介して印加される突発的な外乱衝撃力による伝達体１０の変則的な動きを長手（Ｙ）方向だけでなく、ラジアル（Ｚ）方向にも複数の隣接ブロックにて抑制させることを目的としたものである。
【００３５】
（３）弾性突出部２０はその先端貫通孔１８にワイヤロープ１１を挿入するため、立体包囲構造の一部に切開部２１が施される。図５Ｃに示す通りブロック１２は、Ｙ−Ｙ線を境に右側切開部２１Ｒを施した第一ブロック１２Ｒ′と、左側切開部２１Ｌを施した第二ブロック１２Ｌ′とが予め個別に用意される。貫通孔１５と係合突起１６の付設と同様に、保持体１１には第一および第二ブロック１２Ｒ′，１２Ｌ′が交互に配列され、これによって貫通孔１８からのブロックの脱落を阻止している。図５Ｄは、切開部２１の状態を示し、各接合片２２，２３には、それぞれ凸部２２ａ，２３ａと凹部２２ｂ，２３ｂとを互に連結し、互の係止部２２ｃおよび２３ｃによって図中の矢印ＶおよびＷ方向の加圧に対しても連結状態を維持する。しかし無端保持体１１の組込時は切開部２１を点線で示す接合片２３′に開放して、空間１９より挿入する。
（４）更に、切開部２１による弾性突出部２０の幅（Ｘ）方向の弾性力の強度が低下するのを補償強化するため、Ｖ字型に突出した弾性材２６を二つの平面部１３ａ，１４ａの上方部の間に介在させ二枚の弾性強化板材２５ａ，２５ｂを設置し平面部１３ａ，１４ａにスポット溶接２７で保持させ弾性力を強化させたものである。
【００３６】
（５）また図５Ａ，５Ｂに示すように仮想当接点Ｄとは対称の位置にもう１つ別の仮想の先端当接点Ｄ′を新たに設定し、点線２４で示す新たな弾性傾斜部２０ａ′，２０ａ′を角度θ４のＶ字型にして第三のクサビ状突出部又は閉環状傾斜部を成形してもよい。これによって無端伝達体１０が回転中心Ｃ０を中心とした伝達体内周側の弾性屈曲部２４ａだけでなく、その反対の側に屈曲する場合の伝達体外周側の弾性逆屈曲部２４ｂを確保するためのものである。特に図１で述べた通り、変速指令を受けた瞬間の最小接触点Ａ′にプーリ荷重が集中し、次の回動に伴ってプーリ車１が伝達体１０をＡ′点を挟み込んだままＡ″点で移動する。更にその次の瞬間に、Ｍ″方向に引張られるためＡ″点では、伝達体１０は正規の屈曲性とは逆にθ０が１８０°以上に逆転する。この時に少数ブロック１２のみに逆屈曲衝撃力がＡ″点に集中するのを阻止し、この仮想当接点Ｄ′による弾性吸収力で集中荷重を吸収する逆クサビ効果をもたせたのである。この構成により伝達体１０は、弾性突出部２０を立体的な舌状円錐形に成形Ｌ、長手（Ｙ）方向、正転屈曲角度（θ０）方向、更に逆転屈曲角度（θ０′）方向の三方向に夫々クサビ効果を働かせて、合成ゴム・ベルトと略同等の弾性屈曲性ならびに挟持圧分散機能を保持出来る。
【００３７】
【他の実施例】
上述の第１、第２実施例は、各ブロック１２として受圧部１３，１４と平面部１３ａ，１４ｂと弾性突出部２０が所定の弾性材から成る単一金属材で屈曲成形した湿式変速機用の伝達体の例を開示したが、単一金属材に限定されず、強化繊維を混合した樹脂材で全体を成形しても良く、また金属弾性材にこの樹脂材や金属材をラミネートした積層材の構成にしても良い。また、更に弾性突出部２０の形状は、受圧部から加わるプーリ挾持圧を幅（Ｘ）方向又は、半径Ｒの折曲（θ０、θ０′）方向の方向に充分な弾性が確保されるならば、第二ないし第三の突出部等複数突出部を成形しまた如何なる形状でも良い。更に、本発明の思想は、乾式変速機用の伝達体にも適用でき、例えば受圧部１３，１４をオイルレス・メタルのような含油金属を用い弾性突出部を弾性金属で構成しても良い。以上のように、本発明は、記述の実施態様だけに限定されず、特許請求の範囲内に於いて如何なる形態に変更しても、本権利範囲に含まれる。
【００３８】
【発明の効果】
この発明の高負荷伝達体は、主には金属材だけ、或いは金属と樹脂・繊維との複合材などの剛性素材を用いながら、従来樹脂製伝達体のもつ弾性可撓性、弾性吸収性および屈曲性と同様の原理にもとづき、高負荷用に適用できる充分な弾性可撓性と充分な耐久性と共に弾性吸収性及び屈曲性を実現したものである。この剛性素材を用いながらプーリ車又はベルト伝達体の一箇所に集中荷重が集中する事無く瞬時に多数ブロックに応力変換して分散ししかも充分な弾性可撓性を保証することによって従来の樹脂製伝達体では数十馬力〔ＨＰ〕以下の動力しか伝動能力を持ちえなかったのに対し、数十馬力乃至数百馬力〔ＨＰ〕以上の動力を小型にしてかつ高速の変速応答ができる伝達体を実現した。
【００３９】
本発明の伝達体は、プーリ挾持圧を受けて各ブロックの受圧部が幅（Ｘ）方向に受圧収縮した時に、長手（Ｙ）方向に突出成形した弾性材からなる弾性突出部の先端当接点の位置が長手（Ｙ）方向の伸縮動作に変換している。これにより隣接ブロック相互間で長手（Ｙ）方向に強固に連結しながら、プーリ挾持圧のもつ幅（Ｘ）方向荷重を瞬時に伝達体の長手（Ｙ）方向に分散すると同時に各ブロックが二つの受圧部Ａ１、Ａ２と弾性突出部の先端当接部Ｃとの間で三点支持構造を維持するので傾斜状態のまま伝動することなく位置決めの安定化を図る作用効果を、伝動中に常に機能させたものである。弾性突出部の突出成形方向がベルト伝達体の進行方向の後方に向くので先端当接部が後方から前方に向って長手方向の直進押込荷重を受け、結果的に各受圧部に摩擦圧力を与えて所定の伝達動力を確保する効果がある。
【００４０】
特に高負荷伝達体の受圧分散機能は、無段変速機に適用すると二つの大きな効果を生む。その一つは、伝達体が充分な弾性力による荷重吸収機能をもち安定伝動状態を維持するので最低速Ｖｍｉｎから最高速Ｖｍａｘに至る変速時間を短縮できる。即ち変速制御の速度を急峻に行っても伝達体がそのプーリ挾持圧の急激な変化に応答する高速応答能力を持つことである。もう一つは、変速機の外部の入出力機器から内部に向って変則的又は衝撃的なプーリ挾持圧が印加されることがあっても、ベルト伝達体自体が各ブロックのもつ多軸方向の充分な弾性可撓性によって、この衝撃を少数のブロックに集中させず、瞬時に長手（Ｙ）方向またはラジアル（Ｚ）方向の多数のブロックに分散させることによる衝撃吸収能力をもつことである。この二つの能力によって剛性素材でありながらゴム・ベルトと同等の弾性吸収機能を保持し、しかも樹脂ベルトとは比較にならない程の高負荷動力を小型かつ高速度の変速制御で伝動できる効果を奏する。
【図面の簡単な説明】
【図１】本発明の第１実施例変速機の高負荷伝達体の一部分を示す部分構成図である。
【図２】同上実施例の高負荷伝達体に使われるブロック単体の構成を示し、図２Ａは左側係止具付ブロックの背面図で、図２Ｂは同ブロックの上面図で、図２Ｃは同ブロックの側面図で、図２Ｄは右側係止具付ブロックの背面状態図で、さらに図２Ｅは同ブロック部材の厚さを示す部分断面図である。
【図３】同上実施例の高負荷伝達体のブロックの組立手順を示す部分組立図である。
【図４】同上実施例の高負荷伝達体のブロックの動作説明図であり、図４Ａは受圧変換機能を示す動作説明図で、図４Ｂは同ブロックの分散変形状態を示す動作説明図で、さらに図４Ｃは同上各ブロックの連鎖状態を示す動作説明図である。さらに
【図５】本発明の第２実施例変速機の高負荷伝達体のブロックを示し、図５Ａは同ブロックの正面断面図で、図５Ｂは同ブロックの側面断面組立図で、図５Ｃは同ブロックの側面組立図で、さらに図５Ｄは同ブロックに施した切開部の部分構成図である。
【符号の説明】
１，１ａおよび１ｂ伝達車またはプーリ車
２回転軸
１０高負荷伝達体、ベルト伝達体または伝達体
１１無端保持体、ストラップまたはワイヤロープ
１２ブロックまたはリンク
１２Ｌ左側（係止具付）ブロックまたは第二ブロック
１２Ｒ右側（係止具付）ブロックまたは第一ブロック
１３，１４受圧部
１３ａ，１４ａ平面部
１３ｂ，１４ｂ折曲部または腕曲部
１３ｃ，１４ｃ平面部
１５貫通孔
１６係合突起
１６ａ凹部
１７係止具
１８保持隙間または貫通孔
１９挿入空間
２０弾性突出部
２０ａ傾斜部、板バネ傾斜部またはクサビ状部
２０ｂ台形部または当接部
２０ｃ傾斜平面部または内壁
２０ｄ台形平面部、内壁または別の平面部
２０ｅ腕曲切欠部または切欠部
２０ｆ，２０ｉ平面部
２０ｇ，２０ｈ腕曲部または折曲部
２０ｊ，２０ｋ包囲部
２１，２１Ｒ，２１Ｌ切開部
２２，２３接合片
２２ａ，２３ａ凸部
２２ｂ，２３ｂ凹部
２２ｃ，２３ｃ係止部
２４ａ弾性屈曲部
２４ｂ弾性逆屈曲部
２５弾性板材
２６弾性材
２７溶接部[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a power transmission belt transmission body, for example, an endless transmission body for high load transmission having excellent side pressure resistance from a pulley wheel. In particular, the present invention relates to a transmission body that is optimal for power transmission of constant horsepower in a continuously variable transmission installed in industrial machines such as machine tools, vehicles, and motors.
[0002]
[Prior art]
  As the endless transmission body, many prior arts having a structure in which a large number of links or blocks are arranged and supported on an endless strap have already been devised. Japanese Patent Application Laid-Open No. 2-275145 (Honda Motor Co., Ltd.) is an idea in which a shape memory alloy is used for an endless strap and a method for assembling a large number of metal blocks is improved. Japanese Patent Application No. 6-109077 (Riken) suppresses the movement between adjacent blocks to suppress interference between the steel strap and the block. Further, Japanese Patent Application No. SHO 4-219548 (Couchille, France) discloses an endless transmission body in which a large number of U-shaped links are incorporated in an endless core synthetic rubber belt.
[0003]
  These belt transmission bodies are common in that a pressure receiving portion is provided at each of the left and right ends as a position for receiving the pulley holding pressure in the width (X) direction, but the width (X) direction received by the pressure receiving portion. The pressure absorption method for the pulley holding pressure is incomplete and insufficient. In particular, when applied to a continuously variable transmission, it is applied to the belt transmission body from the outside through a pulley wheel, and the pulley holding pressure is increased due to various external factors such as the load power, the presence / absence of a shift signal, and the speed. The height and speed vary greatly. For this reason, the holding pressure is gently applied at a certain time, but is applied instantaneously and with an extremely large force at other times. In this case, no matter how large and what speed pulley holding pressure is applied, the belt transmission body absorbs it instantly and does not damage both the friction surface of the pulley wheel and the belt transmission body, It is necessary to return to a stable power transmission state.
[0004]
  In the first two prior arts among the prior arts, the block itself is a rigid body such as metal, and there is no elasticity at all with respect to the load in the width (X) direction to which the pulley holding pressure is applied. Therefore, there is no elastic absorption capacity for the load. According to the disclosure concept of Couchille, the open end portion of the U-shaped link is slightly flexible in the width (X) direction, and the presence of some elastic absorption force is recognized. However, since a synthetic rubber belt is used for the endless core, it cannot withstand a sufficiently large pulley holding pressure. In addition, the positioning state of each link becomes unstable at the time of application, and the restraining force of the arrangement state of each link does not work, so that the transmission operation is instantaneously unstable against excessive pressure.
[0005]
[Problems to be solved by the invention]
  The high load transmission body of the transmission according to the present invention has a belt transmission body itself having a width of whatever size and speed at which a pulley holding pressure is applied to the belt transmission body via a pulley wheel. In order to guarantee the load absorption capability by a sufficient elastic force in the (X) direction, each block itself has a structure having a sufficient elastic absorption capability individually. Furthermore, by providing the function of converting the load in the width (X) direction into the load in the longitudinal (Y) direction, a function of sequentially dispersing and absorbing the load is achieved in other blocks adjacent in the longitudinal (Y) direction. It is to let you.
[0006]
  That is, the first of the present inventionSolution issuesEach block transmits power while being in surface contact with an adjacent block when no pulley holding pressure is applied, but when a pulley holding pressure is applied, the load in the width (X) direction is converted into a load in the longitudinal (Y) direction. Provided is a high load transmission body that holds an elastic protrusion that cooperates with an adjacent block to achieve a wedge effect. Furthermore, each block has a stable support state while receiving an excessive load during power transmission due to the wedge effect of the elastic protruding portion that is formed by protruding in the longitudinal (Y) direction even when no pulley holding pressure is applied. It is to provide a high load transmission body that guarantees.
[0007]
  Second of the present inventionSolution issuesSince the elastic protrusions of each block have not only the elastic absorbability due to the wedge effect in the longitudinal (Y) direction but also the characteristics equivalent to the elastic flexibility of the synthetic resin belt, the pulley rotation center C0 is Forward rotation centered and reverse rotation not centered on C0TimeThe idea of a high-load transmission body that guarantees sufficient elastic absorbability with respect to the flexibility in the bending direction is provided.
[0008]
  The third problem to be solved by the present invention is that, particularly when a pulley holding pressure is applied, each block exerts a wedge effect between adjacent blocks, while the two pressure receiving portions A1 and A2 and the tip contact portion C of the elastic projection portion A substantial three-point support structure is maintained between the two, so that a high load transmission body that is sufficiently resistant to a larger pulley holding pressure while maintaining a stable transmission state is provided.
[0009]
  The fourth problem to be solved by the present invention is that each block is an elastic protrusion, the holding pressure is converted from a stretching displacement in the width direction into a stretching displacement in the longitudinal direction, and a linear push load applied in the longitudinal direction is elastically projected from the rear. This ensures that sufficient friction pressure is supplied to both pressure receiving parts.
[00010]
[Means for Solving the Problems]
  First solution of the present inventionmeansIn order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, the high load transmission body of the present invention has a large number of blocks comprising two pressure receiving parts to receive pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape. In a high load transmission body of a transmission that is supported by an endless holding body to form an endless transmission body, the block is arranged to be extendable and contractible in the width (X) direction according to the magnitude of the pulley holding pressure. the aboveBothA pressure receiving portion, which is connected to the pressure receiving portion, transmits the holding pressure in the width (X) direction, and is arranged in a plane perpendicular to the longitudinal (Y) linear movement direction, in close contact with adjacent blocks, and receives the linear push load The flat part for transmitting power, and further, the cross-sectional shape is formed in a wedge shape or a tongue shape in the longitudinal (Y) direction perpendicular to the width direction connecting between the pressure receiving parts and disposed between the pressure receiving parts. And an elastic projecting portion having elastic flexibility to ensure that the pressure-receiving portion is bent with an elastic force in the width direction, and at the time of linear push transmission, the front and rear adjacent blocks, the flat portion and the elastic portion Each of the protrusions contacts the surface and positions the block to transmit power, and during pulley pressure friction transmission, the pulley clamping pressure is converted into elastic stress of the elastic inclined part in the longitudinal direction of the elastic protrusion and elastically absorbed. It is.
[0011]
  Second solution of the present inventionmeansIn order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, the high load transmission body of the present invention has a large number of blocks comprising two pressure receiving parts to receive pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape. In a high load transmission body of a transmission that is supported by an endless holding body to form an endless transmission body, the block is arranged to be extendable and contractible in the width (X) direction according to the magnitude of the pulley holding pressure. the aboveBothA pressure receiving portion, which is connected to the pressure receiving portion, transmits the holding pressure in the width (X) direction, and is arranged in a plane perpendicular to the longitudinal (Y) linear movement direction, in close contact with adjacent blocks, and receives the linear push load The flat part for transmitting power, and further, formed between the pressure receiving parts and projecting in the longitudinal (Y) direction and radial (Z) direction perpendicular to the width direction connecting the pressure receiving parts. There is an elastic protrusion that guarantees elastic flexibility in the width direction between the pressure receiving parts, and the elastic protrusion has a wedge-like or tongue-like cross-sectional shape in the XY and XZ planes and is three-dimensional in the longitudinal direction and radial direction. In other words, the pulley holding pressure is converted into the elastic stress in the longitudinal direction and the radial direction and elastically absorbed.
[0012]
  Third solution of the present inventionmeansThe high load transmission body ofIn order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, to support the pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape, a number of blocks comprising two pressure receiving parts are supported by an endless holding body. In a high load transmission body of a transmission formed with an endless transmission body,Each of the blocks includes the two pressure receiving portions that can be expanded and contracted in the width direction by the holding pressure, the two planar portions that transmit the holding pressure from the two pressure receiving portions to the elastic protrusions, and the two pressure receiving portions. And having one or a plurality of elastic protrusions whose cross-sectional shape protrudes in a wedge shape or a tongue shape in the longitudinal direction perpendicular to the width direction from the flat surface portion.The stress in the width direction of both the pressure receiving portions due to the holding pressure is converted into the longitudinal direction displacement.BackwardAdjacent blockA tip abutting portion of the elastic protruding portion to be abutted and pressed againstBy holding it stably with a three-point support structure between both pressure receiving partsThe flat portion of each block is always regular at an equal angle in the radial direction according to the speed ratio around the pulley rotation axis.Keep the arrayStable transmission.
[0013]
  Fourth solution of the present inventionmeansThe high load transmission body ofIn order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, to support the pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape, a number of blocks comprising two pressure receiving parts are supported by an endless holding body. In a high load transmission body of a transmission formed with an endless transmission body,Each of the blocks includes the two pressure receiving portions that can be expanded and contracted in the width direction by the holding pressure, the two planar portions that transmit the clamping pressure from the two pressure receiving portions to the elastic protrusions, and the two pressure receiving portions. The cross-sectional shape is formed into a wedge shape or a tongue shape in the longitudinal direction perpendicular to the width direction from the flat portion disposed, and the direction of the projecting molding of the elastic projecting portion is directed backward in the longitudinal direction of the transmission body. And a single or a plurality of the above-described elastic protrusions,Longitudinal rectilinear pushing load from an adjacent block that further abuts the tip abutting portion of the elastic protrusion, which has been subjected to stress conversion from the expansion / contraction displacement in the width direction of the pressure receiving portions to the longitudinal expansion / contraction displacement due to the clamping pressure. The power is transmitted by pushing and pressing from the opposite direction.
0014]
DETAILED DESCRIPTION OF THE INVENTION
  In the transmission, the operation of the belt transmission body is distributed over the entire frictional contact surface between the pulley wheel and the belt transmission body at the constant speed ratio operation as shown in FIG. However, since the contact radius r of the belt transmission body starts to fluctuate from one end at the start of the shifting operation, the contact point A ′ having the shortest contact radius r min immediately moves to A ″ at the end point at that time, and the total pressure of the pulley holding pressure is reached. Concentrate there and cause mechanical damage to the belt and pulley. Only at that moment, the bending state of the belt changes from the forward rotation to the reverse rotation as shown by the broken line M ″ in FIG. Will be invited whenever it is supplied.
0015]
  At this time, in order for the transmission body to have a load absorbing function with sufficient elastic force to completely absorb the pulley holding pressure, a single or a few blocks lack sufficient load absorbing capacity, The part converts the expansion / contraction displacement in the width (X) direction into the expansion / contraction displacement in the longitudinal (Y) direction, and the concentrated loads are sequentially distributed in the longitudinal (Y) direction to neighboring blocks adjacent to those blocks. is there. Therefore, this means that when the gear ratio is rapidly changed in a short time, the concentrated load is not concentrated on one place on the pulley wheel and the transmission body, and is instantaneously distributed to many blocks. Thus, it is possible to shift the speed ratio and controllable speed ratio without causing any other transmission failure.
0016]
  In the present specification, the description has been made mainly for the wet transmission used in the oil reservoir, but the present invention can also be applied to the dry type used in the air. Therefore, in the present embodiment, the endless strap and the block are mainly assumed to be a metal rigid body, but the present invention is not limited to this, and the block may be alternately arranged with metal and resin, or the surface of the metal material may be coated with resin or You may shape | mold into the lamination | stacking of a metal material, Furthermore, you may process all by resin material only.
0017]
  Furthermore, the direction of the protrusion molding of the elastic protrusions applied to each block shown in the present specification is that the dispersed absorption load converted by the protrusion molding toward the rear in the traveling direction (rotation direction) of the belt transmission body is converted. Although the example which turned to the reverse direction mutually with the linear pushing load was disclosed, you may make it protrude toward the front of the advancing direction conversely. Further, regarding the protruding shape of the wedge-shaped protruding portion, in this embodiment, a V shape, a trapezoidal shape, a triangular shape, an arc shape, or an elliptical cone shape is shown, but the load in the width (X) direction is long (Y ) If converted into a directional load, the inner and outer walls of adjacent blocks will bite into each other and press while holding the elastic force, and any shape such as a three-dimensional cone, U-shaped or tongue-shaped plate, etc. But it ’s okay.
0018]
[First embodiment]
  FIG. 1 is a partial side view showing a partly mounted state of an endless high load transmission body for a transmission according to a first embodiment of the present invention. In the figure, the left side of the transmitterButPulley holding pressureofWhen not appliedFrom behindPulling pressure friction in which the straight push transmission state P receives a straight push load, and the right side is applied with pulley holding pressure from the transmission wheel 1 and is bent in the forward rotation direction with an angle (θ) of radius R0 around the rotation center C0. The transmission state Q is shown, respectively, and both form a single endless transmission body 10 while being connected. For convenience of drawing, the entire endless transmission body 10 is omitted and only a part is depicted.
0019]
  The transmission body 10 includes an endless holding body 11 having a belt shape and a large number of blocks 12 suspended in a suspended state so as to be slidable on the holding body 11 in the longitudinal (Y) direction. Configured. The transmission body 10 rotates in the rotation direction indicated by the arrow S of the transmission wheel 1. At this time, each block 12 includes pressure receiving portions 13 and 14 that receive the pulley holding pressure in the width (X) direction of the transmission body 10, that is, the direction of the rotation axis by the transmission body 1, and a plane perpendicular to the longitudinal (Y) linear advance direction P. The flat portions 13a, 13c; 14a, 14c; 20f, 20d that transmit power while maintaining contact with each other in close contact with adjacent blocks are also connected to each other on the rear side. And an elastic protrusion 20 that converts an elastic force in the width (X) direction into a stress in the longitudinal (Y) direction at the same time as performing reliable positioning. At this time, each block 12 contributes to transmission while resisting the centrifugal force in the radial (Z) direction in a state where the upper end arm bending notch of the elastic protrusion 20 is surrounded by the endless holding body 11.
0020]
  While the transmission body 10 is transmitting at the constant speed ratio on the track M of the pulley wheel 1, the radii RA, RB, RC, RD, RE of the friction points A, B, C, D, E are all R0 and the transmission body from the pulley wheel 1. The pulley holding pressure applied to 10 is distributed and pressurized substantially uniformly over the entire circumference of the contact surface. However, when a disturbance enters from the outside of the shift command or the transmission, the uniform dispersion state of the holding pressure is disturbed only for a moment until the next constant speed state is reached. Let us analyze the transmission state at the moment when the transmission body 10 is supplied with a gear change command for changing from the constant speed trajectory M with the speed ratio ε0 to the next speed change trajectory M ′ with the speed ratio ε1. At this time, the transmission body 10 starts to move from B to E in order from the contact point A on the tension side. Therefore, the contact diameter r during the moment of transition reaches the relationship rA <rB <rC... RE as shown in FIG.
0021]
  This means that the entire load of pulley holding pressure necessary for transmission is concentrated at one point of the contact point A ′ for only one moment. Even if the present invention receives this concentrated load, each block 12 gives an extremely large concentrated load applied instantaneously and instantly by providing sufficient elastic flexibility in the width (X) direction. Rigid transmission having a structure in which load is distributed and elastically absorbed by points B ′, C ′, D ′, and E ′, which are successively constituted by other adjacent blocks 12 without being only accepted by the block 12 at point A ′. The body 10 is realized. Desirably, the angle θ0 from the point A ′ to the end point E should be dispersed to about 45 to 170 degrees.
0022]
  2 shows the structure of a single block used in the high load transmission body 10 of the first embodiment shown in FIG. 1, FIG. 2A is a rear view of the block 12L with a left side locking tool, and FIG. 2B is a top view of the block 12L. Further, FIG. 2C shows a side view of the block 12L. Furthermore, FIG. 2D shows a rear view of the block 12R with the right side locking tool held by the endless holding body 11. In FIG. 2A, the block 12L with the left side locking tool is provided with a locking tool 17L that prevents the endless holding body 11 from dropping off above the left side flat part 13a, and in the vicinity thereof, the length (Y) of the flat part 13a. Thick lm through-holes 15 are formed in the direction. Further, as shown in FIG. 2B, the right planar portion 14a is provided with an engaging projection 16 having a length lm substantially equal to the thickness lm in the longitudinal (Y) direction at the same height position of the planar portion 14a. On the other hand, as shown in FIG. 2D, on the contrary to the block 12L, the locking tool 17R and the through hole 15 are provided on the flat surface portion 14a, and the engaging protrusion 16 is provided on the flat surface portion 13a, and the right locking device-attached block 12R. Is also prepared in advance. In FIG. 2D, the pulley wheel 1 including the two wheels 1a and 1b and the endless holding body 11 are shown at the same time.
0023]
  In this embodiment, each of the blocks 12L and 12R has the elastic protrusion 20 disposed between the two pressure receiving portions 13 and 14 through the flat portions 13a and 14a, and the entire block 12L and 12R is integrally formed of a single metal elastic material. Processed to form a single block 12. Further, in this example, the elastic protruding portion 20 protrudes in the longitudinal (Y) direction of the transmission body 10 so that the flat plate inclined portions 20a, 20a of the elastic material alternate at substantially a right angle θ = 90 degrees as shown in FIG. 2B. The tip contact portion 20b is formed into a trapezoid. Moreover, as shown in FIG. 2E, the thickness lm in the longitudinal (Y) direction of the pressure receiving portions 13 and 14 is ln = lm × depending on the magnitude of the inclination angle θ between the thickness lm and the thickness lm of the elastic inclined portion 20a. Thickness determined by sin θ1 is selected. Thus, during the linear push-in transmission shown in FIG. 1, the flat surface portions 13a, 13c and 14a, 14c on the front and rear surfaces of the pressure receiving portions 13, 14 are in close contact with each other between the front and rear adjacent blocks 12.From the backNot only is the power transmitted under a straight indentation load, but also the inclined portions 20a of the elastic protrusion 20 and the inclined flat portions 20i and 20c of the trapezoidal portion 20b and the trapezoid flat portions 20f and 20d are simultaneously in close contact between the blocks. In particular, the trapezoidal portion 20b receives a straight indentation load similar to the flat portions 13a, 13c; 14a, 14c as another flat portion.
0024]
  As shown in FIG. 2C, the front sides of the flat portions 13c and 14c, the inclined portion 20a of the elastic protrusion 20 and the trapezoidal portion 20b are all in a flat state, but the back side is above the line U-U shown in FIG. 2A. The flat portions 13a and 14a, the trapezoidal flat surface portion 20f, and the inclined flat surface portion 20i are provided with bent portions 13b and 14b, a trapezoidal bent portion 20g, and an inclined bent portion 20h. Thus, when the transmission body 10 shown in FIG. 1 enters the pressure friction position with the contact radius R0, each block 12 is radial (Z) determined according to the transmission gear ratio ε with respect to the rotation center C0 of the transmission wheel 1. It is configured so that it can be positioned and arranged at substantially the same angle θ1 in the direction. The bent portion may be a straight inclined plane or an arc-shaped arm curved surface, that is, an arm bent portion. The former is applied at the same bending point F even if the speed ratio ε changes as shown in FIG. 4C. In the latter case, the position of the contact point changes according to the speed ratio. In this embodiment, the bent portions 13b and 14b are linear, and the bent portions 20a and 20b are arm-shaped or arm-shaped portions. In this pressurized friction transmission state Q, the elastic protrusions 20 of the respective blocks 12 are positioned in a stable state by the endless strap 11 in an inclined state, and the arm bend notches 20e for contacting according to the speed ratio ε are elastic. It is applied to the upper end of the protrusion 20.
0025]
  FIG. 3 is a block assembly diagram illustrating how the above-described two types of the left-side engaging block 12L and the right-side engaging block 12R are assembled to the endless strap holder 11. Since the through-holes 15 and the engaging projections 16 are alternately formed on the two pressure receiving portions 13 and 14, the adjacent receiving blocks are assembled with the engaging projections 16 inserted into the through-holes 15. . At the same time, the locking members 17L and 17R are alternately projected from the pressure receiving portions 13 and 14, respectively, and an insertion space 19 is left between them. The holding gap 18 is used as an assembly space for the strap 11 through the insertion space 19. At this time, the blocks 12L and 12R are arranged on the entire circumference of the endless holding body 11, and a slight gap is left between the blocks 12L and 12R so that each block 12 can be pressed and moved on the holding body 11. Installed.
0026]
  4A and 4B are operation explanatory views of blocks for explaining the operation of the high load transmission body of this embodiment by the top view of FIG. 2B. FIG. 4A is a principle of conversion of the elastic absorption force of the pulley holding pressure. FIG. 4B is an operation diagram showing a deformed state of the elastic protrusion 20 before and after receiving the holding pressure. For convenience of explanation, as shown in FIG. 4A, the direction of the width W of the transmission body 10 connecting the two pressure receiving portions 13 and 14 is the X axis, and the longitudinal direction of the transmission body 10 is the Y axis. The radial direction shown in FIG.
0027]
  In the continuously variable transmission, in order to change the relative distance between the two conical wheels 1a and 1b and change the frictional pressure to ensure a predetermined transmission power, the transmission body 10 has a pulley whose size and speed are freely variable. Holding pressure is applied. As shown in FIG. 4A, the pulley holding pressure is applied to the friction surfaces a1 and a2 of the pressure receiving portions 13 and 14 in accordance with this.~ sideThe leaf spring is inclined at a predetermined distance L from the ends a'1 and a'2 of the elastic protrusion 20 applied from the surface and transmitted through the flat portions 13a and 14a and formed into a trapezoidal wedge shape or a cone wedge shape. The pressure is applied toward the virtual connection point a0 of the tip contact portion C via the portions B and B ′. In the block 12 of this embodiment, the tip contact portion C is provided with a trapezoidal portion 20b in order to ensure a certain degree of mobility, but it may be V-shaped. It shows that the two end portions a0, a1, and a3 can maintain a stable support state on the XY plane. Moreover, since the endless strap 11 is positioned in the Z-axis direction, the individual blocks 12 are substantially inclined between the conical wheels 1a and 1b in any of the X, Y, and Z-axis directions. An almost complete stable position is ensured during transmission without transmission.
0028]
  In particular, there are two major features of the present invention. The first feature is that, even when the pulley holding pressure applied from the transmission wheel 1 is applied with a small load and gently, or conversely with a significantly excessive load and applied instantaneously, Since the transmission body 10 itself has a sufficient elastic absorption force to quickly absorb elastically, the shift time from the maximum speed ratio εmax to the minimum speed ratio εmin can be remarkably controlled in a short time. The second feature is that even if an extremely large instantaneous load is applied to only a small number of blocks 12, the transmission vehicle 1 and the transmission body are instantaneously distributed to other adjacent block groups in an instant. 10 with no mechanical damage.
0029]
  Next, FIG. 4B explains the basis of the feature for distributing these concentrated loads according to the present invention. In the same figure, the right figure (i) shows a state where the pulley holding pressure is not received from the pressure receiving points a1 and a2 in FIG. 4A, and the left figure (ii) receives the pulley holding pressure and the pressure receiving parts a1 and a2 are b1. , B2 respectively show a state of elastic contraction by a distance β in the width (X) direction.
0030]
  In FIG. 4B- (i), at this time, the angle θ of the leaf spring inclined portions 20a, 20b of the elastic protrusion 20 remains approximately 90 ° as shown in FIG. 2B. However, when it begins to receive the pulley holding pressure of the transmission wheel 1, the pressure receiving portions 13 and 14 start to move, and both the elastic inclined portions 20a and 20b are subjected to stress deformation as shown in FIG. 4B- (ii). The tip contact point also starts to advance from a0 to b0, and the moving distance α becomes l0 (= l02−l01). Since the tip of the present embodiment actually forms a trapezoidal portion 20b, the bent points a01, a02 of the main block 12 are conical elastic inclined portions 20a, 20b with respect to the rear block 12 adjacent to the rear. As a result of the abutment with a strong pressure along with the wedge effect, the block 12 is supported at three points by the pressure receiving points b1 and b2 of the pressure receiving portions 13 and 14 and the substantial tip contact portions b0 of the tip contact portions b01 and b02. Due to the effect, the stress is deformed and is firmly supported and elastically absorbed. The rear block 12 also receives the pressure at the tip contact portion of the main block 12 and the pulley clamping pressure, and sequentially performs an operation substantially the same as the pressure dispersion of the main block 12 and further distributes to the rear block.
0031]
  Further, FIG. 4C illustrates that the elastic protrusions 20 of the plurality of blocks 12 achieve a function of sequentially dispersing or converting the clamping pressure within the belt. That is, the pulley holding pressure in the X-axis direction applied via the pressure receiving portions 13 and 14 of the elastic protrusion 20 of the main block 12-1 is caused by the stress deformation of the wedge-shaped inclined portions 20a and 20b, and the other blocks 12 adjacent to the front and rear. Since the pressure to −0 and 12-1 is changed, the block 12-2 starts to be inclined around the bending point F2 and is converted into elastic stress in the Y-axis direction via the contact point E. Even when the transmission body 10 of the present embodiment is all made of a metal rigid body, it provides a pressure distribution function almost equivalent to that of a flexible belt transmission body made of a resin material such as synthetic rubber. Means. This means that when the pulley holding pressure in the width (X) direction is small and gentle, the converted longitudinal (Y) directionMultipleThe block 12 alone absorbs elastically as its elastic stress. However, even in the case of a sudden and excessive pressure, since a large amount of contraction in the width (X) direction is instantaneously distributed to the numerous blocks 12 in the longitudinal (Y) direction, some blocks and pulley friction surfaces There is no damage. As a result, stable transmission is possible even if the shift time from the lowest speed to the highest speed ratio is shortened.
0032]
  It should be noted that the inclination angles θ and θ2 of the inclined portion 20a of this embodiment can be changed as necessary, and the shape of the trapezoidal portion 20b can be arbitrarily changed as long as it substantially fulfills the three-point support function. Further, the technical idea regarding the load distribution due to the steep impact load due to the lamination of the elastic protrusions of the present invention described above is not limited to a single elastic protrusion, as shown in the second embodiment described below. It may have a part.
0033]
[Second embodiment]
  FIG. 5 shows an endless high load transmission body of a transmission according to a second embodiment of the present invention. 5A is a front sectional view showing the block 12 of the transmission body, FIG. 5B is a side sectional view showing the holding body 11 and the block 12, FIG. 5C is a top view of FIG. 5B, and FIG. It is a partial block diagram which shows the incision part for 11 insertion. Also in this example, the basic idea of elastic absorption by converting the pulley holding pressure in the width (X) direction into the elastic force in the longitudinal (Y) direction of the first embodiment described above is used in a plurality and three-dimensionally. ing. However, since some new technical ideas are disclosed, only the new technical ideas will be described for each item in comparison with the first embodiment.
0034]
  (1) First, the endless holding body is not a belt-like strap, but is an idea constituted by a wire rope-like endless holding body 11 in which a single fiber or steel wire is spring-formed in an annular shape. The cross-sectional shape is circular, and each block 12 is individually slidably supported on the holding body 11 through a through hole 18 provided in the center of the block 12. (2) Secondly, the cross-sectional shape of the elastic projection 20 applied to the block 12 is not a bent molded body made of a simple elastic flat plate material, but a circular three-dimensional structure by applying the surrounding portions 20j and 20k. The idea is a conical or conical structure projecting in a semi-elliptical shape. That is, as shown in FIGS. 5A and 5C, the cross-sectional shape of the XX line is substantially the same V-shaped or U-shaped wedge shape as FIG. 2B of the first embodiment, and is virtually connected to the pressure receiving portions A1 and A2. The three-point support structure with the abutting portion C toward the point a0 and the holding pressure dispersion mechanism by the wedge effect have the same configuration. However, in this example, a virtual tip contact point D is also assumed in the Z-axis direction, and the two elastic inclined portions 20a, 20a are V-shaped or U-shaped at an inclination angle θ3 toward the lower side of the Z-axis (periphery of the transmitting body). A second wedge-shaped or tongue-shaped protrusion having a letter shape is provided as the second wedge-shaped protrusion. Thus, as shown in FIG. 1, each block has a predetermined elasticity due to the second wedge effect not only in the longitudinal (Y) direction but also in the bending angle (θ0) direction about the pulley rotation axis C0. Absorbing power is given. That is, the internal elastic force is increased as the radius of curvature R of the transmission body 10 decreases, and as a result, the transmission body 10 is caused by a sudden disturbance impact force applied from the outside of the transmission through the pulley wheel. The object is to suppress irregular movement not only in the longitudinal (Y) direction but also in the radial (Z) direction by a plurality of adjacent blocks.
0035]
  (3) Since the elastic protrusion 20 inserts the wire rope 11 into the tip through-hole 18, an incision 21 is made in a part of the three-dimensional surrounding structure. As shown in FIG. 5C, in the block 12, a first block 12R ′ having a right incision 21R and a second block 12L ′ having a left incision 21L are separately prepared in advance from the YY line. . Similarly to the attachment of the through hole 15 and the engagement protrusion 16, the first and second blocks 12R 'and 12L' are alternately arranged on the holding body 11, thereby preventing the block from falling off the through hole 18. Yes. FIG. 5D shows the state of the incision portion 21, and the joining pieces 22 and 23 are connected to the convex portions 22 a and 23 a and the concave portions 22 b and 23 b, respectively. The connected state is maintained even under pressure in the directions of arrows V and W. However, when the endless holding body 11 is assembled, the incision 21 is opened to the joining piece 23 ′ indicated by the dotted line and inserted from the space 19.
(4) Further, in order to compensate for the reduction in the strength of the elastic force in the width (X) direction of the elastic protrusion 20 due to the incision 21, the elastic material 26 protruding in a V shape is provided with two flat portions 13 a, Two elastic reinforcing plate members 25a and 25b are installed between the upper portions of 14a and are held by the spot welds 27 on the flat surface portions 13a and 14a to enhance the elastic force.
0036]
  (5) Further, as shown in FIGS. 5A and 5B, another virtual tip contact point D ′ is newly set at a position symmetrical to the virtual contact point D, and a new elastic inclined portion 20a indicated by a dotted line 24 is formed. ′, 20a ′ may be formed into a V shape with an angle θ4 to form a third wedge-shaped protrusion or a closed annular inclined portion. Accordingly, in order to secure not only the elastic bending portion 24a on the inner circumference side of the transmission body centered on the rotation center C0 but also the elastic reverse bending portion 24b on the outer circumference side of the transmission body when the endless transmission body 10 is bent to the opposite side. belongs to. In particular, as described with reference to FIG. 1, the pulley load is concentrated at the minimum contact point A ′ at the moment of receiving the speed change command, and the pulley wheel 1 holds the transmission body 10 with the point A ′ in the next rotation. At the point “A”, the transmitting body 10 reverses θ0 to 180 ° or more contrary to the normal flexibility. At this time, a small number of blocks Only the number 12 prevents the reverse bending impact force from concentrating on the point A ″, and has the reverse wedge effect of absorbing the concentrated load by the elastic absorption force by the virtual contact point D ′. With this configuration, the transmission body 10 forms the elastic protrusion 20 into a three-dimensional tongue-shaped cone L, three in the longitudinal (Y) direction, the forward bending angle (θ0) direction, and the reverse bending angle (θ0 ′) direction. By using the wedge effect in each direction, it is possible to maintain the elastic bending property and pinching pressure dispersion function substantially equivalent to those of synthetic rubbers and belts.
0037]
[Other embodiments]
  The first and second embodiments described above are for wet transmissions in which the pressure receiving portions 13 and 14, the plane portions 13 a and 14 b, and the elastic protrusions 20 are bent as a single metal material made of a predetermined elastic material as each block 12. However, the present invention is not limited to a single metal material, and may be formed entirely of a resin material mixed with reinforcing fibers, or a laminate in which this resin material or metal material is laminated to a metal elastic material. The material may be configured. Further, the shape of the elastic protrusion 20 is such that the pulley holding pressure applied from the pressure receiving portion can be sufficiently elastic in the width (X) direction or the direction of the radius R (bent (θ0, θ0 ′)). A plurality of projecting portions such as the second to third projecting portions may be formed and may have any shape. Furthermore, the idea of the present invention can also be applied to a transmission for a dry transmission. For example, the pressure receiving portions 13 and 14 may be made of oil-impregnated metal such as oilless metal, and the elastic protrusions may be made of elastic metal. . As described above, the present invention is not limited to the described embodiments, and is included in the scope of the present invention even if it is changed in any form within the scope of the claims.
0038]
【The invention's effect】
  The high load transmission body of the present invention is mainly composed of a metal material or a rigid material such as a composite material of a metal and a resin / fiber. Based on the same principle as bendability, it achieves elastic absorbency and bendability as well as sufficient elastic flexibility and sufficient durability applicable for high loads. While using this rigid materialIt is possible to instantly convert stress into multiple blocks and disperse without concentrated load concentrated on one point of pulley wheel or belt transmission body.By guaranteeing sufficient elasticity and flexibility, the conventional resin transmission body can only have a power of several tens of horsepower [HP] or less, whereas several tens of horsepower or several hundred horsepower [HP] or more. Has realized a transmission body that can reduce the power of the machine and can respond at high speed.
0039]
  The transmission body according to the present invention has a tip contact point of an elastic projecting portion made of an elastic material projecting in the longitudinal (Y) direction when the pressure receiving portion of each block is subjected to pressure shrinkage in the width (X) direction under the pulley holding pressure. Is converted into a stretching operation in the longitudinal (Y) direction. As a result, while firmly connecting the adjacent blocks in the longitudinal (Y) direction, the load in the width (X) direction of the pulley holding pressure is instantaneously dispersed in the longitudinal (Y) direction of the transmission body, and at the same time, each blockSince the three-point support structure is maintained between the two pressure receiving portions A1 and A2 and the tip contact portion C of the elastic protrusion portionThe function and effect of stabilizing the positioning without transmitting in the inclined state are always functioned during transmission.Since the projecting direction of the elastic projecting part is rearward in the direction of travel of the belt transmission body, the tip abutting part receives a longitudinal pushing load from the rear to the front, resulting in frictional pressure being applied to each pressure receiving part. Thus, there is an effect of securing predetermined transmission power.
0040]
  In particular, the pressure distribution function of the high load transmission body produces two significant effects when applied to a continuously variable transmission. One of them isBecause the transmission body has a load absorbing function with sufficient elastic force and maintains a stable transmission stateThe shift time from the lowest speed Vmin to the highest speed Vmax can be shortened. That is, even if the speed of the speed change control is steep, the transmission body has a high-speed response capability that responds to a sudden change in the pulley holding pressure. The other is that even if an irregular or shocking pulley holding pressure is applied to the inside from the input / output device outside the transmission, the belt transmission body itself is in the multiaxial direction of each block. Sufficient elastic flexibility ensures that this impact is not concentrated on a small number of blocks, but instantly in the longitudinal (Y) directionOr radial (Z) directionIt has the ability to absorb shocks by dispersing it in multiple blocks. These two capacities maintain the same elastic absorption function as a rubber belt while being a rigid material, and also have the effect of being able to transmit high-load power that is incomparable to resin belts with small and high-speed shift control. .
[Brief description of the drawings]
FIG. 1 is a partial configuration diagram showing a part of a high load transmission body of a transmission according to a first embodiment of the present invention.
2 shows the structure of a single block used in the high load transmission body of the embodiment, FIG. 2A is a rear view of the block with the left side locking device, FIG. 2B is a top view of the block, and FIG. FIG. 2D is a side view of the block, and FIG. 2E is a partial cross-sectional view showing the thickness of the block member.
FIG. 3 is a partial assembly view showing an assembly procedure of a block of the high load transmission body of the embodiment.
4 is an operation explanatory diagram of a block of the high load transmission body of the embodiment, FIG. 4A is an operation explanatory diagram showing a pressure receiving conversion function, FIG. 4B is an operation explanatory diagram showing a distributed deformation state of the block, Furthermore, FIG. 4C is an operation explanatory view showing the chain state of each block. further
FIG. 5 shows a block of a high load transmission body of a transmission according to a second embodiment of the present invention, FIG. 5A is a front sectional view of the block, FIG. 5B is a side sectional assembly view of the block, and FIG. FIG. 5D is a partial configuration diagram of an incision made in the block.
[Explanation of symbols]
  1, 1a and 1b Transmission wheel or pulley wheel
  2 Rotating shaft
  10 High load transmission body, belt transmission body or transmission body
  11 Endless holder, strap or wire rope
  12 blocks or links
  12L Left side (with lock) block or second block
  12R Right side (with lock) block or first block
  13, 14 Pressure receiving part
  13a, 14a plane part
  13b, 14b Bent part or arm part
  13c, 14c plane part
  15 Through hole
  16 Engagement protrusion
  16a recess
  17 Locking tool
  18 Holding gap or through hole
  19 Insertion space
  20 Elastic protrusion
  20a Inclined part, leaf spring inclined part or wedge-shaped part
  20b Trapezoidal part or contact part
  20c Inclined plane or inner wall
  20d trapezoidal plane, inner wall or another plane
  20e Arm bend notch or notch
  20f, 20i plane part
  20g, 20h Arm or bent part
  20j, 20k enclosure
  21,21R, 21L incision
  22,23 Joining piece
  22a, 23a Convex part
  22b, 23b recess
  22c, 23c Locking part
  24a Elastic bent part
  24b Elastic reverse bend
  25 Elastic plate
  26 Elastic material
  27 Welded part

Claims

長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、
上記各ブロックは、該挾持圧の大きさに応じて幅（Ｘ）方向に伸縮自在に配置された上記受圧部と、この受圧部に連なり幅方向に該挾持圧を伝えかつ長手（Ｙ）直進方向に垂直の平面に配置され隣接ブロックと互に密接当接し該直進押込荷重を受けて動力伝達するための上記平面部と、さらに上記両受圧部の間に配置され該両受圧部間を結ぶ幅方向と垂直の長手（Ｙ）方向に向け断面形状がクサビ状または舌状に突出成形されて上記両受圧部間が幅方向の弾性力をもって撓むことを保証する為の弾性屈曲性を持つ弾性突出部とを有すると共に、直進押込伝動時には前後の隣接ブロックと上記平面部および上記弾性突出部で夫々面接触および上記各ブロックの位置決めをして動力伝達しプーリ加圧摩擦伝動時には該挾持圧を上記弾性突出部の長手方向の弾性傾斜部での弾性応力に変換して弾性吸収したことを特徴とする変速機の高負荷伝達体。In order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, to support the pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape, a number of blocks comprising two pressure receiving parts are supported by an endless holding body. In a high load transmission body of a transmission formed with an endless transmission body,
Each of the blocks includes the pressure receiving portion arranged to be expandable and contractable in the width (X) direction according to the holding pressure, and transmits the holding pressure in the width direction continuously to the pressure receiving portion and travels straight in the longitudinal direction (Y). Arranged on a plane perpendicular to the direction and in close contact with adjacent blocks to receive power from the linearly indented load and to transmit power, and further arranged between the two pressure receiving parts and connecting the two pressure receiving parts The cross-sectional shape is formed into a wedge shape or tongue shape in the longitudinal (Y) direction perpendicular to the width direction, and has an elastic flexibility to ensure that the pressure-receiving portion is bent with an elastic force in the width direction. and having an elastic projecting portion, at the time of straight advance push transmission該挾lifting to be the positioning of the respective surface contact and each block power transmission when the pulley pressure friction transmission before and after the adjacent block and the flat section and the elastic protrusions The length of the elastic protrusion High load transmission body of the transmission, characterized in that the elastically absorbed by converting the elastic stress in the direction of the elastic inclined portion.

長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、
上記各ブロックは、該挾持圧の大きさに応じて幅（Ｘ）方向に伸縮自在に配置された上記受圧部と、この受圧部に連なり幅方向に該挾持圧を伝えかつ長手（Ｙ）直進方向に垂直の平面に配置され隣接ブロックと互に密接当接し該直進押込荷重を受けて動力伝達するための上記平面部と、さらに上記両受圧部の間に配置され該両受圧部間を結ぶ幅方向と垂直の長手（Ｙ）方向およびラジアル（Ｚ）方向に向け突出成形されて上記両受圧部間に幅方向の弾性屈曲性を保証する弾性突出部とを有すると共に、上記弾性突出部はＸＹおよびＸＺ平面の各断面形状がクサビ状または舌状で長手方向およびラジアル方向に立体的な弾性傾斜部を形成して該挾持圧を長手方向およびラジアル方向の弾性応力に変換して弾性吸収したことを特徴とする変速機の高負荷伝達体。In order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, to support the pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape, a number of blocks comprising two pressure receiving parts are supported by an endless holding body. In a high load transmission body of a transmission formed with an endless transmission body,
Each of the blocks includes the pressure receiving portion arranged to be expandable and contractable in the width (X) direction according to the holding pressure, and transmits the holding pressure in the width direction continuously to the pressure receiving portion and travels straight in the longitudinal direction (Y). Arranged on a plane perpendicular to the direction and in close contact with adjacent blocks to receive power from the linearly indented load and to transmit power, and further arranged between the two pressure receiving parts and connecting the two pressure receiving parts An elastic protrusion that is formed in a longitudinal (Y) direction and a radial (Z) direction perpendicular to the width direction to ensure elastic flexibility in the width direction between the two pressure receiving portions; each sectional shape of the XY and XZ plane is in the longitudinal and radial directions to form a three-dimensional elastic inclining portion converts the clamping pressure in the longitudinal direction and radial direction of the elastic stress elastic absorbed by wedge-shaped or tongue Of a transmission characterized by Load transmission body.

請求項１または２において、上記ブロックは、上記弾性突出部を、一端で上記平面部に連なる上記弾性傾斜部で形成しまたはこの弾性傾斜部に両側で連なり長手（Ｙ）直進方向に垂直の平面から該直進押込荷重を受けるもう一つの別の平面部と上記弾性傾斜部とで形成したことを特徴とする変速機の高負荷伝達体。According to claim 1 or 2, said block, the spring arms, one end in form with the elastic inclined portion continuous to the flat portion or the contiguous longitudinal (Y) plane perpendicular to the straight direction at both sides in the elastic inclined portion A high load transmission body for a transmission, characterized in that it is formed by another flat portion that receives the linearly pushing load from the elastic slant portion.

請求項３において、上記ブロックは、上記平面部または上記弾性突出部の該弾性傾斜部には該傾斜部背面外壁の上方側または下方側に夫々腕曲切欠部或いは折曲部または腕曲部を施して上記ブロックの上記受圧部をラジアル方向に位置決め配列可能にしたことを特徴とする変速機の高負荷伝達体。In claim 3, said block, the flat portion or the upper side or respectively arms songs notch downward or bent portion or arm curved portion of the inclined portion rear outer wall the elastic inclined portion of the spring arms A high load transmission body for a transmission, characterized in that the pressure receiving portions of the block can be positioned and arranged in a radial direction.

長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、
上記各ブロックは、該挾持圧により幅方向に伸縮変位可能な上記両受圧部と、該挾持圧を上記両受圧部から弾性突出部に伝える二つの上記平面部と、更に上記両受圧部間に配される上記平面部から幅方向と垂直の長手方向に断面形状がクサビ状又は舌状に突出成形された単一または複数の上記弾性突出部とを有すると共に、該挾持圧による上記両受圧部の幅方向の伸縮変位を長手方向の伸縮変位に応力変換して後方の隣接ブロックに当接加圧される上記弾性突出部の先端当接部と上記両受圧部との間の三点支持構造で安定保持する事で上記各ブロックの上記平面部がプーリ回転軸芯を中心に速比に応じてラジアル方向に等角度で常時正規の配列を維持して安定伝動させたことを特徴とする変速機の高負荷伝達体。 In order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, to support the pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape, a number of blocks comprising two pressure receiving parts are supported by an endless holding body. In a high load transmission body of a transmission formed with an endless transmission body ,
Each of the blocks includes the two pressure receiving portions that can be expanded and contracted in the width direction by the holding pressure, the two planar portions that transmit the holding pressure from the two pressure receiving portions to the elastic protrusions, and the two pressure receiving portions. And both of the pressure receiving portions by the holding pressure and having one or a plurality of the elastic protruding portions whose cross-sectional shape protrudes in a wedge shape or a tongue shape in the longitudinal direction perpendicular to the width direction from the flat surface portion. A three-point support structure between the tip contact portion of the elastic protrusion and the pressure receiving portions that are subjected to stress conversion from the expansion / contraction displacement in the width direction to the expansion / contraction displacement in the longitudinal direction and pressed against the adjacent block behind The above-mentioned flat portion of each block is stably transmitted by maintaining a regular arrangement at an equal angle in the radial direction according to the speed ratio with the pulley rotating shaft core as a center by stably holding the shaft. High load transmission body of the machine.

長手方向と垂直な平面で直進押込荷重を受けるため平板状に成形した平面部の左右端にプーリ挾持圧を受けるために二つの受圧部を構成したブロックの多数個を無端保持体に支持させて無端伝達体を形成してなる変速機の高負荷伝達体において、
上記各ブロックは、該挾持圧により幅方向に伸縮変位可能な上記両受圧部と、該挟持圧を上記両受圧部から弾性突出部に伝える二つの上記平面部と、更に上記両受圧部間に配される上記平面部から幅方向と垂直の長手方向に断面形状がクサビ状又は舌状に突出成形され且つ上記弾性突出部の突出成形の方向を上記伝達体の長手進行方向の後方に向って突出成形された単一または複数の上記弾性突出部とを有すると共に、該挟持圧による上記両受圧部の幅方向の伸縮変位を長手方向の伸縮変位に応力変換された上記弾性突出部の先端当接部を更に後方で当接する隣接ブロックからの長手方向の直進押込荷重によって逆方向から押込加圧する事で動力伝動したことを特徴とする変速機の高負荷伝達体。 In order to receive a linear indentation load in a plane perpendicular to the longitudinal direction, to support the pulley holding pressure at the left and right ends of the flat part formed into a flat plate shape, a number of blocks comprising two pressure receiving parts are supported by an endless holding body. In a high load transmission body of a transmission formed with an endless transmission body ,
Each of the blocks includes the two pressure receiving portions that can be expanded and contracted in the width direction by the holding pressure, the two planar portions that transmit the clamping pressure from the two pressure receiving portions to the elastic protrusions, and the two pressure receiving portions. The cross-sectional shape is formed into a wedge shape or a tongue shape in the longitudinal direction perpendicular to the width direction from the flat portion disposed, and the direction of the projecting molding of the elastic projecting portion is directed backward in the longitudinal direction of the transmission body. A single or a plurality of elastic protrusions formed in a protruding manner , and the elastic protrusions at the ends of the elastic protrusions subjected to stress conversion into the longitudinal expansion and contraction displacements in the width direction of the two pressure receiving parts due to the clamping pressure. A high-load transmission body for a transmission, wherein power is transmitted by pressing and pressing in the reverse direction by a linearly pressing load in the longitudinal direction from an adjacent block that abuts the contact portion further rearward .

請求項１、２、５または６において、上記ブロックは、帯状またはワイヤロープ状の上記無端保持体が上記弾性突出部の上端に配した腕曲切欠部を包囲しまたは中心に配した貫通孔を通すことで上記無端保持体上を摺動可能に保持されたことを特徴とする変速機の高負荷伝達体。Claim 1, 2, 5 or 6, the block is a through-hole band or wire ropes of the endless carrier is arranged to surround or around the arm piece notched section provided at the upper end of the spring arms A high-load transmission body for a transmission, wherein the high-end transmission body is slidably held on the endless holding body.

請求項７において、上記ブロックは、長手方向またはラジアル方向に複数の上記弾性突出部を有し上記両受圧部を共通させて複数の該三点支持構造を働かせたことを特徴とする変速機の高負荷伝達体。 8. The transmission according to claim 7, wherein the block includes a plurality of the elastic protrusions in a longitudinal direction or a radial direction, and the plurality of three-point support structures are operated by using both the pressure receiving portions in common. High load transmission body.

請求項１、２、５または６において、上記ブロックは、上記弾性突出部のＸＺ平面の断面形状がラジアル方向でかつ上記伝達体の内周側または外周側に向い第二または第三のクサビ状または舌状突出部を夫々突出形成され、上記伝達体の正転屈曲方向または逆転屈曲方向の弾性力を保持したことを特徴とする変速機の高負荷伝達体。Claim 1, 2, 5 or 6, the block is the second or third wedge-shaped cross section in the XZ plane of the elastic protrusion facing an inner peripheral side or the outer peripheral side in the radial direction a and the transmission body Alternatively, a high-load transmission body for a transmission, wherein tongue-shaped projecting portions are formed so as to protrude and retain the elastic force in the forward bending direction or the reverse bending direction of the transmission body.

請求項１、２、５または６において、上記ブロックは、上記弾性突出部および上記平面部を弾性材で成る金属材または樹脂と強化繊維との複合材の単一平板材から或いは該単一平板材に別の金属材または樹脂材をラミネートした積層平板材から成形したことを特徴とする変速機の高負荷伝達体。Claim 1, 2, 5 or 6, the block is the elastic projection and or the single flat plate from a single flat plate composite with reinforcing fibers and the metal material or a resin consisting of the planar portion of a resilient member high load transmission body of the transmission or another metal material in wood, characterized in that molded from stacked flat plate laminated with the resin material.