JP2004270876A

JP2004270876A - Follower bearing equipped with lubrication means

Info

Publication number: JP2004270876A
Application number: JP2003065253A
Authority: JP
Inventors: Takaaki Tsuboi; 孝明壷井
Original assignee: Nippon Thompson Co Ltd
Current assignee: Nippon Thompson Co Ltd
Priority date: 2003-03-11
Filing date: 2003-03-11
Publication date: 2004-09-30
Anticipated expiration: 2023-03-11
Also published as: JP4050638B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a follower bearing in which a lubrication means which comes in contact with the outer ring of a cam follower as the follower bearing so as to lubricate the same has a lubricating section which comes in contact with a mated rolling surface on which the outer ring rolls, whereby the lifespan is prolonged, the cleaning facility is improved and the number of processing steps can be decreased. <P>SOLUTION: The lubrication means comes in contact with the outer ring of the cam follower at least at two positions so as to lubricate the same, and is formed with the lubricating section which comes in contact with the mated rolling surface on which the outer ring rolls. A support member of the lubrication means is provided with a scraper for scraping the mated rolling surface. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、摺動トラック面に接触させて使用する潤滑装置を備えたフォロア軸受の改良に関する。
【０００２】
【従来の技術】
従来例のカムフォロア或はローラフォロアと称されるフォロア軸受の外輪に潤滑油を供給する構造は、外輪外周面とカバーとにより形成された空隙たる潤滑油溜りが、常に潤滑油を保持し、かつ塗布する構造である。
また、フォロア軸受の外輪外周面とカバーとの間の空隙にフェルト等の吸油性軟質材を装着することにより、潤滑油のフォロア軸受の外輪外周面に対する塗布ができ、また該カバーにより潤滑油の飛散の抑制が可能な構造であった。（例えば特許文献１参照）
【０００３】
【特許文献１】
特開平９−８９０７８号公報（第２頁、第３頁、図１Ａ、１−Ｂ、図３）
【０００４】
【発明が解決しようとする課題】
しかしながら、前記特開平９−８９０７８号公報に示されるものは、外輪外周面とカバーとにより形成された空隙たる潤滑油溜りに吸油性軟質材料たるフェルトを装着して給油する構造であり、フェルトと外輪外周面との接触状態により摺動抵抗が変化し、場合によっては摺動抵抗が大きくなるという問題がある。
【０００５】
またフォロア軸受の外周面を覆うカバーが、フォロア軸受の軸の端面部分またはカム従動節本体に固定されるものであり、従って前記軸の端面部分または該軸のカバー取付部の加工を必要とし、加工工程が増加する等の問題もある。
【０００６】
またフォロア軸受の軸の端面部分に、カバーを固定するための該軸の端面部分の利用、例えば潤滑油の供給孔の形成などが制限される問題がある。
【０００７】
このため、本発明は、外輪外周面の転動時に、潤滑部材との接触による摺動抵抗が少なく、しかも焼付防止が可能で、フォロア軸受の寿命の向上が図られ、かつ潤滑油の飛散もなく、クリーン性を向上させることができ、しかも加工工数を減少できると共に、フォロア軸受の軸の軸端の利用も可能な潤滑装置を備えるフォロア軸受を提供することを課題としている。
【０００８】
【課題を解決するための手段】
前記課題を解決するために、請求項１の発明では、外輪が組付けられている軸付きカムフォロア或はローラフォロアと称されるフォロア軸受において、フォロア軸受の外輪に少なくとも２箇所で接触して潤滑を行う潤滑部材を具備する潤滑装置と、該潤滑装置を外輪外周面に向って当接支持する支持部材とが、フォロア軸受の軸に軸支されている構成とした。
【０００９】
請求項２の発明では、請求項１の発明に、潤滑部材に、フォロア軸受の外輪が転動する相手側転動面に当接する接触部が形成されており、かつ潤滑部材の支持部材に、前記接触部近傍の相手側転動面に対して微小間隔を保持して対峙する位置にスクレイパーを形成した構成を付加した。
【００１０】
請求項３の発明では、請求項１または請求項２の発明に、潤滑装置の潤滑部材が、潤滑油を含有した多孔質構造の焼結樹脂部材、及び潤滑油の再補給を可能とした多孔質構造の焼結樹脂部材のうちから選ばれた潤滑部材であるという構成を付加した。
【００１１】
請求項４の発明では、請求項１および請求項２の発明に潤滑装置の潤滑部材が固形潤滑剤であるという構成を付加した。
【００１２】
【発明の実施の形態】
図１ないし図４は請求項１および請求項２の各発明を併せ適用した潤滑装置を備えたフォロア軸受の第１の実施例を示すもので、フォロア軸受たる軸付きカムフォロア１の構成の概要を示しており、厚肉の外輪４が組付けられている軸付きカムフォロア１に、潤滑部材５が具備された潤滑装置２が装着され、かつ該潤滑装置２を、外輪の外周面６に向って支持部材３が若干の押圧力を有して当接支持した構成とされている。
【００１３】
次に第１の実施例の軸付きカムフォロア１の詳細を、図２（Ａ）（正面図）、図２（Ｂ）（縦断面図）、図２（Ｃ）（側面図）、図２（Ｄ）（支持体の背面図）について説明する。
【００１４】
図２（Ｂ）および図２（Ｃ）において、軸付きカムフォロア１の軸７の軌道部８は、ニードルローラたる転動体群９が転動するための軌道面を形成しており、該転動体群９の外側に組み込まれた外輪４が、軸７に対して転動体群９を介して回動自在に支承されている。
【００１５】
軸７の端部には、軸取付ねじ部１０が形成されており、図２（Ｂ）に一部破断面として表示されている従動節１１に穿設された軸孔１２に軸７が挿着され、ナット１３により軸取付部１４で前記従動節１１に固着されると共に、後述される支持部材３の端面材２１の端部が、同様に軸７の軸取付部１４に軸支されて共締めされている。この時軸７の端面に穿設された六角孔４０はナット１３による締付時の締め返しに供せられる。
【００１６】
図２（Ｃ）の半部を断面とした側面図に示される符号１５は、軸７と一体的なフランジ部、符号１６は軸７に組み込まれた側板で、両者共に外輪４の転動時における軸方向の位置決め用とされている。
【００１７】
図１及び図２（Ａ）に示されるように、潤滑装置２の潤滑部材５は、フォロア軸受たる軸付きカムフォロア１の外輪４の外周面６に少なくとも２箇所で接触して潤滑を行うと共に、一方で外輪４が接触し転動する相手側転動面１７にも２箇所で接触し、潤滑を行う。従って該潤滑装置２は、前記軸付きカムフォロア１の外輪４、並びに相手側転動面１７との両者に同時に接触、潤滑を行うもので、図２（Ａ）に示されるように後述される支持部材３の保持部２２に装着されている。
【００１８】
図３は前記潤滑部材５を示しており、該潤滑部材５は、前記保持部２２に図３に示す背部５ｃ部分で着脱自在に装着されており、上端部５ａは、外輪４の図２（Ａ）、（Ｂ）に示す相手側転動面１７に接触して潤滑を行う部分とされており、図示例では、縦断面半円形状とされ、接触による摩擦係数を少なくし、必要以上の摩擦力を与えることなく相手側転動面１７への潤滑を円滑に行いうる形状とされ、また外輪４に接触する隅部５ｂは円弧面に形成され、外輪の外周面６に対する回転摩擦に適合する円弧面とされ、前記背部５ｃは、支持部材３の前記保持部２２に適合する形状とされている。なお、潤滑部材５の形状は、同一機能を有する限り、図示構造に限定されるものではない。
支持部材３は、図４（Ａ）、図４（Ｂ）、図４（Ｃ）に示されるように弾性材たる板材がＬ字形に折曲され、端面部材（２１）が形成されており、該端面部材（２１）は端部の孔２０により、軸付きカムフォロア１の軸７に軸支されている。支持部材３は正面側を示す図４（Ａ）及び、図２（Ａ）に示されるごとく、外輪４を背面及び上部両側２箇所で覆う形状とされている。
【００１９】
また、前記支持部材３は、弾性を有する板材で形成されており、若干の押圧力を有して外輪の外周面６に向って潤滑部材５を確実に保持すると共に支持部材３のバネ作用により、潤滑部材（５）の接触部分に若干加圧作用をあたえうる設定をすることにより、軸付きカムフォロア１の外輪４の外周面６及び前記相手側転動面１７に、夫々適合する設定摺動抵抗での潤滑が円滑に行われる。
【００２０】
また支持部材３の上面端部には、軸付きカムフォロア１の外輪４が転動する相手側転動面１７に対応する位置に潤滑部材（５）を装着できる保持部２２が配設されている。即ち図３に示す潤滑部材５の上端部５ａの頂面が前記相手側転動面１７の摺動面に必要最小限の摺動抵抗で当接するよう保持されている。また前記上端部５ａに隣接して保持部２２の上面から、符号２４が付された突起片が立設され、該突起片２４の頂部が相手側転動面１７に対して微小間隔を保持して対峙する位置を占めており、潤滑部材５の上端部５ａに対応するスクレイパーとされ、前記相手側転動面１７の塵埃等の除去に供せられている。
【００２１】
潤滑装置２の支持部材３は、成形が容易な弾性を保有する材料であれば、金属のほか合成樹脂製であってもよい。
【００２２】
第１の実施例に示す潤滑部材５は、交換可能であれば、フェルト等の油吸収性軟質材料とし、潤滑油を含ませる構成としてもよい。
【００２３】
図５ないし図８は第２の実施例を示し、図５は第２の実施例のフォロア軸受たる軸付きカムフォロアの構成の概要を示しており、主たる使用目的、機能、作用において前記第１実施例と同一の部材は、同一名称、同一符号で表示している。符号１は、第１の実施例のものと同一構造のものを使用したフォロア軸受たる軸付きカムフォロア、２５は潤滑装置、２６は潤滑部材、２７は潤滑装置２５を支持する支持部材、４は軸付きカムフォロア１の厚肉の外輪、６は外輪４の外周面、１５はフランジ部、４０は軸取付用六角穴であり、符号３１は、後述される空隙部分を示し、潤滑装置２５の潤滑部材２６と、外輪外周面６とが接触していない部分であって潤滑油の油溜りとされている。
【００２４】
第２の実施例を示す詳細図である図６（Ａ）、図６（Ｂ）、図６（Ｃ）において、軸付きカムフォロア１の外輪４に、上部の左右２箇所及び中心部直下１箇所の計３箇所で接触して潤滑を行う潤滑部材２６を具備する潤滑装置２５と、該装置２５を支持し軸付きカムフォロア１に軸支されている支持部材２７の主たる構成部分について説明する。
【００２５】
図６（Ａ）は、軸付きカムフォロア１の縦断面であり、該カムフォロア１の軸７の軌道部８はニードルローラたる転動体群９が転動するための軌道面を形成しており、転動体群９の外周に組み込まれた外輪４は、軸７に対して転動体群９を介して回動自在に支承されている。
【００２６】
軸７の端部には、軸取付ねじ部１０が形成されており、破断面として表わす従動節１１に穿設された軸孔１２に軸７が挿入され、ナット１３で軸取付部１４が従動節１１に固着されていると共に、後述される支持部材２７の背面板３０が軸支され共締めされている。
【００２７】
図６（Ａ）において、符号１５は軸７と一体的なフランジ部、符号１６は軸７に組み込まれた側板で、外輪４の転動時における軸方向位置決め用とされている。
【００２８】
図５及び図６（Ａ）、（Ｂ）、（Ｃ）に示されるように、潤滑装置２５の潤滑部材２６は、軸付きカムフォロア１の外輪４の外周面６に対して少なくとも３箇所の潤滑接触部１８、１８、１９において接触すると共に、外輪４の外周面６が接触し転動する相手側転動面１７にも凸部たる接触部２８、２８が接触して潤滑する。従って前記カムフォロア１の外輪４と相手側転動面１７との両者の潤滑を同時に行う。
【００２９】
前記潤滑部材２６は、図７（Ａ）、（Ｂ）に示されるごとく、外径の両側面が垂直面をなし、下面が水平面をなし、上部の２箇所に外輪４の外周面６に対する潤滑接触部１８、１８及び相手側転動面１７に接触する接触部２８、２８が形成され、下面には１箇所の潤滑接触部１９が形成され、この、潤滑接触部１８、１８と潤滑接触部１９とを除く潤滑部材２６の内周面は、外輪４の外周面６との間に空隙部分３１、３１を形成する凹陥部とされて潤滑油の油溜りとされている。なお、図６（Ａ）に示すごとく、軸取付ねじ部１０の端面の給油口３７から軸７の軌道部８に通ずる潤滑油供給路３８が穿設されている。なお、潤滑部材２６は、請求項３の発明により、多孔質構造の焼結樹脂部材とされてもよく、この潤滑部材２６は、特開平１０−２０５５３４号公報に記載されているごとく高密度ポリエチレン樹脂の微粒子、例えば、細粒径３０μｍで、粗粒径が２５０〜３００μｍの粉末を、成形型に充填し、加圧加熱成形して作製したオープンポアから成る多孔質の焼結樹脂部材で作製されている。潤滑プレートの多孔質の焼結樹脂部材の空間率は、例えば、４０〜５０％のものを使用でき、上記の多孔質の焼結樹脂部材を、潤滑油であるタービン油等に浸漬し、潤滑油を多孔部に含浸させたものであり、潤滑油の補給も可能である。
【００３０】
また潤滑部材２６は、請求項４の発明により、固形潤滑剤とされてもよく、この場合の潤滑部材２６は、特開２００１−２０８０５７号公報に一例として記載されているごとく、粉末樹脂として、超高分子量ポリエチレンパウダ（例えば、三井石油化学株式会社製のミペロン（登録商標）ＸＭ−２２０）と、潤滑油として、ＦＢＫオイル（タービン油）（ＲＯ＃１００）とを準備し、両者を重量比で３０：７０の割合で混合し、得られた液状混合物を成形型に注入し、この成形型を気密箱に配置して箱内圧を下げて脱泡し、成形型を１５０℃で１０分以上加熱して混合液を固形化したのち、放熱後に成形型から脱型し、仕上げ成形することにより、固形潤滑剤とされたものである。
【００３１】
図８（Ａ）、（Ｂ）、（Ｃ）に示すものは、前記図７（Ａ）、（Ｂ）に示す潤滑部材２６を支持する支持部材２７を示しており、図８（Ｂ）に示す背面板（３０）に開設された図８（Ａ）に示す孔３９により、支持部材２７が軸７に軸支され、背面板３０には図８（Ａ）、（Ｂ）に示すごとく正面側に向って底面板３３が折曲形成されており、前記潤滑部材２６を着脱自在に載置できるように構成されており、該底面板３３の前縁の任意の２箇所に小片３６が上向きに折曲形成され、前記背面板３０と小片３６とにより潤滑部材２６を安定保持できるように構成されている。
【００３２】
また底面板３３の両側から上方へ折曲された折曲片３３Ａ、３３Ｂの上部には、潤滑部材２６を上方から保持する保持部３４が形成され、該保持部３４の先端部に図６（Ｂ）に示すように、前記相手側転動面１７に近接し、該面１７に対し微小間隔を保持して上端面が位置させられた突起片がスクレイパー３５として折曲形成され、前記転動面１７の塵埃除去に供せられている。
【００３３】
図９に示す潤滑装置を備えた軸付きカムフォロアは、図５に示す第２実施例の変形例であり、その基本構成は第２実施例と同一であり、その作用も同一であるが、潤滑部材４１が縦断面で欠円形状であり、該潤滑部材４１を保持する支持部材４２も同様の欠円形状とされている点で構造上の差を有する。従って図９において、第２実施例と同一作用、同一機能の部材については同一符合を用いて説明する。
【００３４】
図９に示す潤滑装置２９は、図５、図６（Ｂ）に示される第２の実施例の潤滑装置２５の変形例であり、外輪４の外周面６に接触して潤滑を行うもので、外輪４に対して上部の２箇所の接触部１８、１８、下部の１箇所の接触部１９で接触して潤滑を行い、相手側転動面１７に対応する潤滑面とされる接触部２８、２８が上部の上面に配設されており、この接触部２８、２８の各背面には、相手側転動面に近接してスクレイパー３５が形成されている。これ等の接触部１８、１８、１９、２８、２８及びスクレイパー３５の構成も、作用も、機能も、図５に示す実施例のものと同一であるが、全体の外形形状が略欠円形状であり、外観が良く、角形に比し占有空間が狭く、取付上のスペースを狭くしうるものである。
【００３５】
図１０（Ａ）、（Ｂ）は、第３の実施例を示すものでフォロア軸受たるローラフォロア４３の構成の概要を示している。
この実施例は、第２の実施例の軸付きカムフォロア１をローラフォロア４３に組替えた構造のものであり、図１０では図示が省略されているが、第２の実施例の図５、図６（Ｂ）に示される潤滑装置２５、支持部材２７、潤滑部材２６は、第２の実施例のものと同一の部材を適用している。従って主たる使用目的、機能、作用において第２の実施例と同一の部材は同一名称、同一符号で表示しており、符号４３はローラフォロア、４４は外輪、４５は外輪外周面、３５はスクレイパーである。
【００３６】
即ち図１０（Ａ）、（Ｂ）に示すローラフォロア４３の外輪４４に対する潤滑については、図６（Ｂ）に示す第２の実施例の潤滑装置２５と同一形状、同一作用のものを適用する。
即ち、潤滑装置２５は外輪４４の外周面４５に対して潤滑を行うもので、外輪４４の上部の２箇所の潤滑接触部１８、１８と下部の１箇所の潤滑接触部１９により接触して潤滑を行う。また前記相手側転動面１７に対応して接触部２８、２８が配設されており、該接触部２８、２８の接触により潤滑が行われ、また該接触部２８、２８の各背面には相手側転動面１７に近接してスクレイパー３５が形成されている。これ等の潤滑接触部１８、１８、１９、接触部２８、２８及びスクレイパー３５の構成、作用も、図５、図６（Ｂ）に示す実施例のものと同一のものである。
従って、該潤滑部材２６を具備している潤滑装置２５は、支持部材２７に支承されると共に支持部材２７の背面板３０でローラフォロア４３の軸４６に軸支されている。
図１０（Ａ）に示すローラフォロア４３の縦断面において、ローラフォロア４３の軸４６に嵌入された内輪４７には、ローラフォロアたる転動体群４８が転動するための軌道面５６が形成されており、転動体群４８の外周に組込まれた外輪４４にも軌道面５９が形成されており、転動体群４８を介して軸４６に対して回動自在に支承されている。図１０（Ａ）中符号５４は転動体群４８の保持器である。
【００３７】
軸４６の転動体群４８側の端部には軸４６と一体にフランジ部６０が形成され、他の端部には、軸取付ねじ部４９が形成されており、従動節１１に穿設された孔５０に軸４６が挿入され、ナット１３で固着されていると共に、図１０（Ａ）、（Ｂ）に示されるように支持部材２７の背面板３０が軸支され共締めされている。
【００３８】
また符号５１は転動体群４８の両側において軸４６に組込まれた側板で、軸４６の端部に形成されたフランジ部６０と共に外輪４４の転動時における軸方向の位置決め用とされている。
【００３９】
図１１は、請求項４の発明を、図１０（Ａ）に示すローラフォロア４３における転動体群４８が配設される外輪４４と内輪４７との間の該転動体群４８の転動部位に、潤滑剤として組み込んだ実施の一例を、図１０（Ａ）中のＸ−Ｘ線断面位置に相当する軸４６の軸心と直交する縦断面とし示している。
【００４０】
図１１において、軸４６に内輪４７が嵌着され、内輪４７と外輪４４との間に転動体群４８が配列され、内輪４７と外輪４４との間に転動体群４８が転動する軌道面５６、５９が形成され、外輪４４の外周面４５が相手側転動面１７に沿って転動する構造とされている。
【００４１】
図１１において転動体群４８と保持器５４とは、内輪４７と外輪４４との間において、転動体群４８の転動面が露出された状態で固形潤滑剤５５により覆われている。
【００４２】
前記転動体群４８と保持器５４及び固形潤滑剤５５とは、一体に組み立てられ、固形潤滑剤５５は内輪４７の軌道面５６と外輪４４の軌道面５９と、転動体群４８と保持器５４との間の間隙部分に、充填された構造で一体成形されている。前記固形潤滑剤５５は、ローラフォロア４３に限らず、既述のカムフォロアにも適用されることは勿論である。
【００４３】
この請求項４の発明に係る固形潤滑剤５５を用いた場合、転動体群４８の回転に伴い固形潤滑剤５５から滲み出た潤滑油が徐々に軌道面と転動体群４８との接触部分に供給されるので、内輪４７と外輪４４との間の潤滑性能を長期に亘って維持できる。
また固形潤滑部材５５は、前記軌道面５６の転動体群４８と保持器５４の隙間を塞ぐ形状に成形されるので、塵埃等の異物の侵入やある程度の水分の浸入を防止するシールとしての働きも奏する。
【００４４】
【発明の効果】
請求項１に記載される発明によると、軸付きカムフォロア或はローラフォロアと称するフォロア軸受の外輪に少なくとも２箇所で接触して潤滑を行う潤滑部材を具備する潤滑装置と、該潤滑装置を前記フォロア軸受の外輪の外周面に向って当接支持する支持部材とが前記フォロア軸受の軸に軸支されている構成であるから、外輪の転動に伴って、潤滑装置より適量の潤滑油が潤滑部に対して供給され、かつ鋼板等弾性を有する材料を使用する支持部材のばね効果により接触部が押圧され所定の接触圧が付与でき、接触しての潤滑作用により、より効果的な潤滑油の供給ができるので外輪外周面の転動による発熱や焼付きなどを良好に防止でき、接触部の損耗を防ぎ、寿命を向上させる効果をもたらし、かつ潤滑油の飛散を低減させることができ、クリーン性を向上させる効果を奏する。
【００４５】
潤滑部材は、外輪外周面と少なくとも２箇所で接触するので、外輪外周面と摺動部材たる潤滑部材との接触部分が少ないので摺動抵抗を抑えることができる効果がある。
【００４６】
また支持部材における潤滑部材の装着部分が外輪の外周面に対して位置決めされているので、潤滑部材の接触部分が正確に位置決めされ、かつ固着されて接触するので、接触部分の寸法管理が可能となり、より効果的に軌道面に潤滑油を供給でき、摺動抵抗を抑えることができる効果がある。また支持体を軸と共締めして固定できるから取付のための加工や部品を必要としない効果を有する。更には、フォロア軸受の外周域、軸端等に潤滑油溜り形成のためのカバー等が全く不要となるので、その加工工程を不必要とし、グリースニップルの取付、集中給油管の取付け等軸端の利用も可能とする等の付帯的効果も有する。
【００４７】
請求項２に記載される発明によると、潤滑部材に、フォロア軸受の外輪が転動する相手側転動面に当接する接触部が形成されており、潤滑装置の支持部材に前記接触部近傍の相手側転動面に対して微小間隔を保持して対峙する位置を占めるようにスクレイパーが形成されているので、潤滑装置の潤滑部材は相手側転動面にも接触し、相手側転動面により効果的に潤滑油を供給でき、摺動抵抗の減少、接触部の損耗防止等をより向上させうる効果がある。
【００４８】
更に、前記相手側転動面に接触する潤滑部材の接触部付近に配設されたスクレイパーにより、転動面の塵埃等を除去できるので、転動面の保護及び前述の効果のより一層の向上を図りうる効果がある。
【００４９】
請求項３に記載される発明によれば、軸付きカムフォロア或はローラフォロアと称するフォロア軸受の外輪外周面と潤滑部材との間には、上部２箇所と下部１箇所の接触潤滑部が配置されるのみで、接触部以外の部分には空隙部分たる油溜り部が軸心に沿って形成されているという構成であるから、外輪外周面と潤滑部材との間に形成された空隙部分の存在により摺動抵抗の減少を図ることができる効果を有している。
【００５０】
請求項３に記載される発明によると、潤滑装置の潤滑部材は、潤滑油を含有した多孔質構造及び潤滑油の再補給を可能とする多孔質構造の焼結樹脂部材で構成されているから、潤滑部材としての成形が容易であり、潤滑部材の交換が可能で取り扱いが容易であるという効果を有し、潤滑油供給系路が不要となり、フォロア軸受の構造を簡単としうる効果も奏する。
【００５１】
潤滑部材は、潤滑油を含有した多孔質構造の焼結樹脂部材であり、フォロア軸受の使用条件に対応した各種の潤滑油の選択、含浸、使用が可能であり、再含浸も可能となり、１組のフォロア軸受を継続して使用可能とする効果も有する。
【００５２】
請求項４の発明によると、潤滑部材が固形潤滑剤であり、該潤滑部材の交換のみにより、フォロア軸受の長期間の連続稼動を可能とする効果を奏し、更には潤滑油供給回路の形成が全く不要であるため、フォロア軸受の構造の簡略化、小型化を図りうる効果も奏する。
【図面の簡単な説明】
【図１】潤滑装置を備えたフォロア軸受たる軸付きカムフォロアの第１の実施例の斜視図である。
【図２】図１に示すものの正面、背面、断面を示す図である。
【図３】図１に示されるものの潤滑部材の斜視図である。
【図４】図１に示されるものの支持部材の正面、背面、側面を示す図である。
【図５】潤滑装置を備えた軸付きカムフォロアの第２の実施例の斜視図である。
【図６】図５に示すものの断面、正面、側面を示す図である。
【図７】図５に示されるものの潤滑部材の正面、側面を示す図である。
【図８】図５に示されるものの支持部材の正面、側面、平面を示す図である。
【図９】潤滑装置を備えた軸付きカムフォロアの別の実施例の正面図である。
【図１０】潤滑装置を備えたローラフォロアの第３の実施例の断面図、正面図である。
【図１１】請求項４の発明を適用したローラフォロアの実施例における図１０（Ａ）中のＸ−Ｘ線断面位置に相当する縦断面図である。
【符号の説明】
１カムフォロア
２、２５潤滑装置
３、２７支持部材
４、４４外輪
５、２６、４１潤滑部材
６、４５外輪外周面
１７相手側転動面
１８、１９潤滑接触部
２４、３５スクレイパー
２８接触部
２９潤滑装置
３１空隙部分
４３ローラフォロア
４７内輪
５５固形潤滑剤[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of a follower bearing provided with a lubrication device used in contact with a sliding track surface.
[0002]
[Prior art]
In a conventional structure in which lubricating oil is supplied to the outer ring of a follower bearing called a cam follower or a roller follower, a lubricating oil reservoir as a gap formed by an outer ring outer peripheral surface and a cover always holds lubricating oil, and It is a structure to apply.
Also, by installing an oil-absorbing soft material such as felt in the gap between the outer ring outer peripheral surface of the follower bearing and the cover, the lubricating oil can be applied to the outer ring outer peripheral surface of the follower bearing, and the cover can be used to lubricate the lubricating oil. The structure was capable of suppressing scattering. (For example, see Patent Document 1)
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-89078 (page 2, page 3, FIG. 1A, 1-B, FIG. 3)
[0004]
[Problems to be solved by the invention]
However, the structure disclosed in Japanese Patent Application Laid-Open No. 9-89078 has a structure in which a felt, which is an oil-absorbing soft material, is attached to a lubricating oil reservoir which is a gap formed by an outer peripheral surface of an outer ring and a cover, and lubricated. There is a problem that the sliding resistance changes depending on the state of contact with the outer peripheral surface of the outer ring, and in some cases, the sliding resistance increases.
[0005]
Further, a cover covering the outer peripheral surface of the follower bearing is fixed to the end face portion of the shaft of the follower bearing or the cam follower main body, and thus requires processing of the end face portion of the shaft or the cover mounting portion of the shaft, There are also problems such as an increase in processing steps.
[0006]
In addition, there is a problem that the use of the end face of the shaft for fixing the cover to the end face of the shaft of the follower bearing, for example, the formation of a lubricating oil supply hole is limited.
[0007]
Therefore, according to the present invention, during rolling of the outer ring outer peripheral surface, sliding resistance due to contact with the lubricating member is small, seizure can be prevented, the life of the follower bearing is improved, and lubricating oil is scattered. Another object of the present invention is to provide a follower bearing having a lubricating device that can improve cleanliness, reduce the number of processing steps, and can also use the shaft end of the follower bearing shaft.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, according to the invention of claim 1, in a follower bearing called an axial cam follower or a roller follower to which an outer ring is attached, lubricating by contacting the outer ring of the follower bearing at at least two places. And a supporting member for supporting the lubricating device in contact with the outer peripheral surface of the outer race are supported by a shaft of a follower bearing.
[0009]
According to a second aspect of the present invention, in the first aspect of the present invention, the lubricating member has a contact portion that is in contact with a mating rolling surface on which the outer ring of the follower bearing rolls, and A configuration in which a scraper is formed at a position facing the opposite rolling surface in the vicinity of the contact portion while maintaining a small interval is added.
[0010]
According to a third aspect of the present invention, in the first or second aspect, the lubricating member of the lubricating device has a porous structure of a sintered resin member containing a lubricating oil and a porous member capable of replenishing the lubricating oil. A configuration is added in which the lubricating member is selected from sintered resin members having a high quality structure.
[0011]
According to a fourth aspect of the present invention, a configuration in which the lubricating member of the lubricating device is a solid lubricant is added to the first and second aspects of the invention.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1 to 4 show a first embodiment of a follower bearing provided with a lubricating device to which the inventions of claims 1 and 2 are applied. The outline of the configuration of a cam follower 1 with a shaft as a follower bearing is shown. 1, a lubricating device 2 provided with a lubricating member 5 is mounted on a cam follower 1 with a shaft to which a thick outer ring 4 is attached, and the lubricating device 2 is moved toward an outer peripheral surface 6 of the outer ring. The support member 3 has a configuration in which the support member 3 is abutted and supported with a slight pressing force.
[0013]
2A (front view), FIG. 2B (vertical sectional view), FIG. 2C (side view), and FIG. D) (back view of the support) will be described.
[0014]
2 (B) and 2 (C), a raceway portion 8 of a shaft 7 of the cam follower 1 with a shaft forms a raceway surface for rolling a group of rolling members 9 serving as needle rollers. The outer ring 4 incorporated outside the group 9 is rotatably supported on the shaft 7 via the rolling element group 9.
[0015]
A shaft mounting screw portion 10 is formed at an end of the shaft 7, and the shaft 7 is inserted into a shaft hole 12 formed in a follower 11, which is shown as a partially broken surface in FIG. And is fixed to the follower 11 by a shaft mounting portion 14 by a nut 13, and an end of an end face member 21 of the support member 3 described later is similarly supported by the shaft mounting portion 14 of the shaft 7. They are tightened together. At this time, the hexagonal hole 40 formed in the end face of the shaft 7 is used for tightening with the nut 13 when tightening.
[0016]
Reference numeral 15 shown in a side view in which a half portion of FIG. 2C is a cross section is a flange portion integrated with the shaft 7, and reference numeral 16 is a side plate incorporated in the shaft 7, both of which are used when the outer race 4 rolls. For positioning in the axial direction.
[0017]
As shown in FIGS. 1 and 2A, the lubricating member 5 of the lubricating device 2 lubricates the lubricating member 5 by contacting the outer peripheral surface 6 of the outer ring 4 of the cam follower 1 with a shaft at at least two places. On the other hand, the outer ring 4 also comes into contact with the mating rolling surface 17 on which the outer ring 4 comes into contact with rolling at two places to perform lubrication. Accordingly, the lubricating device 2 simultaneously contacts and lubricates both the outer ring 4 of the cam follower 1 with the shaft and the mating rolling surface 17 and supports the lubricating device 2 as described later with reference to FIG. It is mounted on the holding part 22 of the member 3.
[0018]
FIG. 3 shows the lubricating member 5. The lubricating member 5 is detachably attached to the holding portion 22 at a back portion 5c shown in FIG. 3, and an upper end portion 5a is provided on the outer race 4 in FIG. The lubricating portion is in contact with the mating rolling surface 17 shown in FIGS. 1A and 1B and is lubricated. In the illustrated example, the lubricating portion has a semicircular vertical cross section, thereby reducing the coefficient of friction due to the contact and making it unnecessary. It has a shape that can smoothly lubricate the mating rolling surface 17 without giving a frictional force, and the corner 5b that comes into contact with the outer ring 4 is formed in an arcuate surface, and is adapted to rotational friction with the outer peripheral surface 6 of the outer ring. The back portion 5 c is shaped to fit the holding portion 22 of the support member 3. The shape of the lubricating member 5 is not limited to the illustrated structure as long as it has the same function.
As shown in FIGS. 4 (A), 4 (B) and 4 (C), the support member 3 is formed by bending an elastic plate material into an L-shape to form an end member (21). The end face member (21) is supported by the shaft 7 of the cam follower 1 with a shaft through an end hole 20. As shown in FIGS. 4 (A) and 2 (A) showing the front side, the support member 3 has a shape that covers the outer ring 4 at two places on both the back and upper sides.
[0019]
Further, the support member 3 is formed of an elastic plate material, has a slight pressing force, securely holds the lubrication member 5 toward the outer peripheral surface 6 of the outer ring, and uses the spring action of the support member 3 to operate. By setting the contact portion of the lubricating member (5) so as to give a slight pressurizing action, the set sliding can be adapted to the outer peripheral surface 6 of the outer ring 4 of the cam follower with shaft 1 and the mating rolling surface 17 respectively. Lubrication with resistance is performed smoothly.
[0020]
At the upper end of the support member 3, there is provided a holding portion 22 to which a lubricating member (5) can be attached at a position corresponding to the mating rolling surface 17 on which the outer ring 4 of the cam follower 1 with a shaft rolls. . That is, the top surface of the upper end portion 5a of the lubricating member 5 shown in FIG. 3 is held so as to abut against the sliding surface of the mating rolling surface 17 with a minimum necessary sliding resistance. Further, a projection piece denoted by reference numeral 24 is erected from the upper surface of the holding part 22 adjacent to the upper end part 5a, and the top part of the projection piece 24 holds a minute interval with respect to the mating rolling surface 17. And a scraper corresponding to the upper end portion 5a of the lubricating member 5, and is used for removing dust and the like on the mating rolling surface 17.
[0021]
The support member 3 of the lubricating device 2 may be made of synthetic resin in addition to metal, as long as the material has elasticity that is easy to mold.
[0022]
The lubricating member 5 shown in the first embodiment may be made of an oil-absorbing soft material such as felt, if it is replaceable, and may contain lubricating oil.
[0023]
FIGS. 5 to 8 show a second embodiment, and FIG. 5 shows an outline of the configuration of a cam follower with a shaft as a follower bearing of the second embodiment. The same members as in the example are indicated by the same names and the same reference numerals. Reference numeral 1 denotes a cam follower with a shaft as a follower bearing using the same structure as that of the first embodiment, 25 denotes a lubricating device, 26 denotes a lubricating member, 27 denotes a supporting member for supporting the lubricating device 25, and 4 denotes a shaft. A thick outer ring of the cam follower 1, 6 is an outer peripheral surface of the outer ring 4, 15 is a flange portion, 40 is a hexagonal hole for shaft mounting, reference numeral 31 denotes a gap portion described later, and a lubricating member of the lubricating device 25. 26 is a portion where the outer ring outer peripheral surface 6 is not in contact, and is a lubricating oil sump.
[0024]
6 (A), 6 (B), and 6 (C), which are detailed views showing the second embodiment, the outer ring 4 of the cam follower 1 with a shaft has two upper right and left locations and one location just below the center. The main components of a lubricating device 25 provided with a lubricating member 26 for contacting and lubricating at a total of three locations and a supporting member 27 which supports the device 25 and is supported by the cam follower 1 with a shaft will be described.
[0025]
FIG. 6A is a longitudinal section of the cam follower 1 with a shaft, and the raceway portion 8 of the shaft 7 of the cam follower 1 forms a raceway surface for rolling a group of rolling elements 9 as needle rollers. The outer ring 4 incorporated on the outer periphery of the moving body group 9 is rotatably supported on the shaft 7 via the rolling body group 9.
[0026]
A shaft mounting screw portion 10 is formed at an end of the shaft 7, and the shaft 7 is inserted into a shaft hole 12 formed in a driven joint 11 represented as a broken surface, and the shaft mounting portion 14 is driven by a nut 13. In addition to being fixed to the joint 11, a back plate 30 of a support member 27 described later is pivotally supported and fastened together.
[0027]
In FIG. 6A, reference numeral 15 denotes a flange portion integral with the shaft 7, and reference numeral 16 denotes a side plate incorporated in the shaft 7 for positioning in the axial direction when the outer race 4 rolls.
[0028]
As shown in FIGS. 5 and 6 (A), (B) and (C), the lubricating member 26 of the lubricating device 25 lubricates the outer peripheral surface 6 of the outer ring 4 of the shafted cam follower 1 in at least three places. In addition to the contact at the contact portions 18, 18, 19, the contact portions 28, 28, which are convex portions, also lubricate the mating rolling surface 17, which is in contact with the outer peripheral surface 6 of the outer ring 4 and rolls. Therefore, the outer ring 4 of the cam follower 1 and the mating rolling surface 17 are simultaneously lubricated.
[0029]
As shown in FIGS. 7A and 7B, the lubricating member 26 has lubricating surfaces for the outer peripheral surface 6 of the outer race 4 at two upper positions, both sides of the outer diameter forming a vertical surface, a lower surface forming a horizontal surface. The contact portions 18 and 18 and the contact portions 28 and 28 that contact the mating rolling surface 17 are formed, and one lubricating contact portion 19 is formed on the lower surface, and the lubricating contact portions 18 and 18 and the lubricating contact portion are formed. The inner peripheral surface of the lubricating member 26 excluding 19 is formed as a concave portion that forms gap portions 31 between the outer peripheral surface 6 of the outer ring 4 and a lubricating oil reservoir. As shown in FIG. 6 (A), a lubricating oil supply passage 38 is formed from the oil supply port 37 on the end face of the shaft mounting screw portion 10 to the track portion 8 of the shaft 7. Incidentally, the lubricating member 26 may be a sintered resin member having a porous structure according to the invention of claim 3, and the lubricating member 26 is made of a high-density polyethylene as described in JP-A-10-205534. Resin fine particles, for example, powder having a fine particle diameter of 30 μm and a coarse particle diameter of 250 to 300 μm, are filled in a mold, and are made of a porous sintered resin member made of an open pore formed by pressure and heat molding. Have been. The porous sintered resin member of the lubricating plate may have a porosity of, for example, 40% to 50%. The porous sintered resin member is immersed in a lubricating oil such as a turbine oil and lubricated. The porous portion is impregnated with oil, and lubricating oil can be supplied.
[0030]
Further, the lubricating member 26 may be a solid lubricant according to the invention of claim 4, and the lubricating member 26 in this case is, as described as an example in JP-A-2001-208057, as a powder resin, Ultra high molecular weight polyethylene powder (for example, Miperon (registered trademark) XM-220 manufactured by Mitsui Petrochemical Co., Ltd.) and FBK oil (turbine oil) (RO # 100) as a lubricating oil are prepared, and the weight ratio between the two is adjusted. The mixture was mixed at a ratio of 30:70, the obtained liquid mixture was poured into a mold, and the mold was placed in an airtight box, the pressure inside the box was lowered, and the foam was defoamed. After the mixture is solidified by heating, the mixture is removed from the mold after heat radiation, and is subjected to finish molding to form a solid lubricant.
[0031]
FIGS. 8A, 8B, and 8C show a support member 27 that supports the lubricating member 26 shown in FIGS. 7A and 7B, and FIG. The support member 27 is pivotally supported by the shaft 7 by the hole 39 shown in FIG. 8 (A) opened in the rear plate (30) shown in FIG. The bottom plate 33 is bent toward the side so that the lubricating member 26 can be removably mounted thereon, and the small pieces 36 face upward at arbitrary two places on the front edge of the bottom plate 33. The lubricating member 26 is configured to be stably held by the back plate 30 and the small pieces 36.
[0032]
A holding portion 34 for holding the lubricating member 26 from above is formed on the upper portions of the bent pieces 33A and 33B which are bent upward from both sides of the bottom plate 33, and FIG. As shown in FIG. 2B, a protruding piece which is close to the mating rolling surface 17 and whose upper end surface is positioned with a small distance from the mating surface 17 is bent and formed as a scraper 35. The surface 17 is provided for dust removal.
[0033]
A cam follower with a shaft provided with a lubricating device shown in FIG. 9 is a modification of the second embodiment shown in FIG. 5, and its basic configuration is the same as that of the second embodiment, and its operation is the same. There is a structural difference in that the member 41 has a partially circular shape in a longitudinal section, and the supporting member 42 for holding the lubricating member 41 has the same partially circular shape. Therefore, in FIG. 9, members having the same functions and functions as those of the second embodiment will be described using the same reference numerals.
[0034]
A lubricating device 29 shown in FIG. 9 is a modification of the lubricating device 25 of the second embodiment shown in FIGS. 5 and 6B, and performs lubrication by contacting the outer peripheral surface 6 of the outer race 4. The two contact portions 18, 18 at the upper portion and the contact portion 19 at the lower portion make contact with the outer ring 4 to perform lubrication, and a contact portion 28 serving as a lubricating surface corresponding to the mating rolling surface 17. , 28 are disposed on the upper surface of the upper part, and a scraper 35 is formed on the back surface of each of the contact portions 28, 28 in close proximity to the mating rolling surface. The structure, operation and function of these contact portions 18, 18, 19, 28 and 28 and the scraper 35 are the same as those of the embodiment shown in FIG. The appearance is good, the occupied space is narrower than the square shape, and the space for mounting can be narrowed.
[0035]
FIGS. 10A and 10B show a third embodiment and show an outline of the configuration of a roller follower 43 as a follower bearing.
This embodiment has a structure in which the shafted cam follower 1 of the second embodiment is replaced with a roller follower 43, and is not shown in FIG. 10, but is shown in FIGS. 5 and 6 of the second embodiment. The same members as those of the second embodiment are applied to the lubrication device 25, the support member 27, and the lubrication member 26 shown in FIG. Therefore, the same members as those of the second embodiment in the main purpose, function and operation are indicated by the same names and the same reference numerals, reference numeral 43 denotes a roller follower, 44 denotes an outer ring, 45 denotes an outer ring outer peripheral surface, and 35 denotes a scraper. is there.
[0036]
That is, as for lubrication of the outer ring 44 of the roller follower 43 shown in FIGS. 10A and 10B, the same shape and the same action as those of the lubricating device 25 of the second embodiment shown in FIG. 6B are applied. .
That is, the lubricating device 25 lubricates the outer peripheral surface 45 of the outer ring 44, and the two lubricating contact portions 18, 18 in the upper portion of the outer ring 44 and the lubricating contact portion 19 in the lower portion contact and lubricate. I do. Further, contact portions 28, 28 are provided corresponding to the mating rolling surface 17, and lubrication is performed by the contact of the contact portions 28, 28, and on the back surface of each of the contact portions 28, 28. A scraper 35 is formed near the mating rolling surface 17. The construction and operation of these lubricating contact portions 18, 18, 19, contact portions 28, 28 and scraper 35 are the same as those of the embodiment shown in FIGS. 5 and 6B.
Therefore, the lubricating device 25 including the lubricating member 26 is supported by the supporting member 27 and is supported by the shaft 46 of the roller follower 43 on the back plate 30 of the supporting member 27.
In the longitudinal section of the roller follower 43 shown in FIG. 10A, a raceway surface 56 for rolling the rolling element group 48 as a roller follower is formed on the inner ring 47 fitted on the shaft 46 of the roller follower 43. A raceway surface 59 is also formed on the outer race 44 incorporated on the outer periphery of the rolling element group 48, and is rotatably supported on the shaft 46 via the rolling element group 48. Reference numeral 54 in FIG. 10A indicates a cage for the rolling element group 48.
[0037]
A flange portion 60 is formed integrally with the shaft 46 at an end of the shaft 46 on the rolling element group 48 side, and a shaft mounting screw portion 49 is formed at the other end. The shaft 46 is inserted into the hole 50 and fixed with the nut 13, and the back plate 30 of the support member 27 is pivotally supported and fastened together as shown in FIGS. 10A and 10B.
[0038]
Reference numeral 51 denotes a side plate incorporated in the shaft 46 on both sides of the rolling element group 48, together with a flange portion 60 formed at an end of the shaft 46, for positioning in the axial direction when the outer ring 44 rolls.
[0039]
FIG. 11 shows that the invention according to claim 4 is applied to the rolling portion of the rolling element group 48 between the outer ring 44 and the inner ring 47 in the roller follower 43 shown in FIG. An example of an embodiment in which a lubricant is incorporated is shown as a vertical cross section orthogonal to the axis of the shaft 46 corresponding to the cross section position along the line XX in FIG.
[0040]
In FIG. 11, an inner ring 47 is fitted on a shaft 46, a rolling element group 48 is arranged between the inner ring 47 and the outer ring 44, and a raceway surface on which the rolling element group 48 rolls between the inner ring 47 and the outer ring 44. 56 and 59 are formed, and the outer peripheral surface 45 of the outer race 44 is configured to roll along the mating rolling surface 17.
[0041]
In FIG. 11, the rolling element group 48 and the retainer 54 are covered with the solid lubricant 55 between the inner ring 47 and the outer ring 44 with the rolling surface of the rolling element group 48 exposed.
[0042]
The rolling element group 48, the retainer 54, and the solid lubricant 55 are assembled integrally, and the solid lubricant 55 includes the raceway surface 56 of the inner ring 47 and the raceway surface 59 of the outer ring 44, and the rolling element group 48 and the retainer 54. Are integrally formed with a filled structure. The solid lubricant 55 is, of course, not limited to the roller follower 43, but is also applicable to the cam follower described above.
[0043]
When the solid lubricant 55 according to the fourth aspect of the present invention is used, the lubricating oil that has oozed from the solid lubricant 55 with the rotation of the rolling element group 48 gradually contacts the raceway surface and the contact portion between the rolling element group 48. Since it is supplied, the lubrication performance between the inner ring 47 and the outer ring 44 can be maintained for a long time.
Further, since the solid lubricating member 55 is formed in a shape that closes the gap between the rolling element group 48 of the raceway surface 56 and the retainer 54, the solid lubricating member 55 functions as a seal for preventing intrusion of foreign matter such as dust and penetration of a certain amount of moisture. Also play.
[0044]
【The invention's effect】
According to the first aspect of the present invention, a lubricating device including a lubricating member that lubricates by contacting an outer ring of a follower bearing called a cam follower with a shaft or a roller follower at at least two places, and the lubricating device is provided with the follower. Since the support member for supporting and supporting the outer ring of the outer ring of the bearing is supported by the shaft of the follower bearing, an appropriate amount of lubricating oil is lubricated by the lubricating device with the rolling of the outer ring. The contact portion is pressed by a spring effect of a supporting member that is made of a material having elasticity such as a steel plate and is supplied to the portion, and a predetermined contact pressure can be applied. Can prevent the heat generation and seizure caused by the rolling of the outer ring outer peripheral surface, prevent wear of the contact part, improve the service life, and reduce the scattering of lubricating oil. , An effect of improving cleanliness.
[0045]
Since the lubricating member comes into contact with the outer peripheral surface of the outer ring at at least two places, there is little contact between the outer peripheral surface of the outer race and the lubricating member as a sliding member, so that the sliding resistance can be suppressed.
[0046]
In addition, since the mounting portion of the lubricating member in the support member is positioned with respect to the outer peripheral surface of the outer ring, the contact portion of the lubricating member is accurately positioned and fixedly contacted, so that dimensional control of the contact portion becomes possible. The lubricating oil can be more effectively supplied to the raceway surface, and the sliding resistance can be suppressed. Further, since the support can be fixed together with the shaft, there is an effect that no processing or parts are required for mounting. Further, since no cover or the like for forming a lubricating oil reservoir is required on the outer peripheral area of the follower bearing, the shaft end, and the like, the machining process is not required, and the grease nipple is attached, and the centralized lubrication pipe is attached. It also has additional effects such as enabling the use of
[0047]
According to the invention described in claim 2, the lubricating member is formed with the contact portion that comes into contact with the mating rolling surface on which the outer ring of the follower bearing rolls, and the support member of the lubricating device is provided near the contact portion. Since the scraper is formed so as to occupy a position facing the mating rolling surface with a small interval, the lubricating member of the lubricating device also contacts the mating rolling surface, and As a result, the lubricating oil can be supplied more effectively, and there is an effect that the sliding resistance can be reduced and the contact portion can be prevented from being worn out.
[0048]
Furthermore, dust and the like on the rolling surface can be removed by the scraper disposed near the contact portion of the lubricating member that comes into contact with the mating rolling surface, so that the rolling surface can be protected and the above-described effects can be further improved. There is an effect that can be achieved.
[0049]
According to the invention described in claim 3, two upper and one lower contact lubricating portions are disposed between the outer peripheral surface of the outer ring of the follower bearing called a cam follower with a shaft or a roller follower and the lubricating member. And the oil reservoir portion, which is a gap portion, is formed along the axis in the portion other than the contact portion, so that there is a gap portion formed between the outer peripheral surface of the outer ring and the lubricating member. Has the effect of reducing the sliding resistance.
[0050]
According to the invention described in claim 3, the lubricating member of the lubricating device is constituted by the porous structure containing the lubricating oil and the sintered resin member having the porous structure enabling the replenishment of the lubricating oil. The lubricating member can be easily formed, the lubricating member can be replaced, and the lubricating member can be easily handled. The lubricating oil supply line is not required, and the structure of the follower bearing can be simplified.
[0051]
The lubricating member is a sintered resin member having a porous structure containing a lubricating oil. Various lubricating oils corresponding to the use conditions of the follower bearing can be selected, impregnated and used, and can be re-impregnated. This also has the effect that the set of follower bearings can be used continuously.
[0052]
According to the invention of claim 4, the lubricating member is a solid lubricant, and the replacement of the lubricating member has an effect of enabling continuous operation of the follower bearing for a long period of time. Since it is unnecessary at all, there is an effect that the structure of the follower bearing can be simplified and downsized.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first embodiment of a cam follower with a shaft as a follower bearing provided with a lubricating device.
FIG. 2 is a diagram showing a front surface, a back surface, and a cross section of what is shown in FIG.
FIG. 3 is a perspective view of a lubrication member shown in FIG.
FIG. 4 is a diagram showing the front, back, and side surfaces of the support member shown in FIG.
FIG. 5 is a perspective view of a second embodiment of a cam follower with a shaft provided with a lubrication device.
FIG. 6 is a diagram showing a cross section, a front, and a side of the one shown in FIG. 5;
FIG. 7 is a view showing the front and side surfaces of the lubrication member shown in FIG.
FIG. 8 is a view showing the front, side, and plane of the support member shown in FIG. 5;
FIG. 9 is a front view of another embodiment of a cam follower with a shaft provided with a lubrication device.
FIG. 10 is a sectional view and a front view of a third embodiment of a roller follower provided with a lubrication device.
FIG. 11 is a longitudinal sectional view corresponding to a sectional position along line XX in FIG. 10A in the embodiment of the roller follower to which the invention of claim 4 is applied.
[Explanation of symbols]
Reference Signs List 1 cam follower 2, 25 lubrication device 3, 27 support member 4, 44 outer ring 5, 26, 41 lubrication member 6, 45 outer ring outer peripheral surface 17 mating rolling surface 18, 19 lubricating contact portion 24, 35 scraper 28 contact portion 29 lubrication Device 31 Void portion 43 Roller follower 47 Inner ring 55 Solid lubricant

Claims

外輪が組付けられている軸付きカムフォロア或はローラフォロアと称されるフォロア軸受において、フォロア軸受の外輪に少なくとも２箇所で接触して潤滑を行う潤滑部材を具備する潤滑装置と、該潤滑装置を外輪外周面に向って当接支持する支持部材とが、フォロア軸受の軸に軸支されていることを特徴とする潤滑装置を備えたフォロア軸受。In a follower bearing called a cam follower or a roller follower with a shaft to which an outer ring is attached, a lubricating device including a lubricating member that contacts and lubricates the outer ring of the follower bearing at at least two places, and A follower bearing provided with a lubricating device, wherein a support member that abuts and supports the outer ring outer peripheral surface is supported by a shaft of the follower bearing.

潤滑部材に、フォロア軸受の外輪が転動する相手側転動面に当接する接触部が形成されており、潤滑装置の支持部材の、前記接触部近傍の相手側転動面に対して微小間隔を保持して対峙する位置にスクレイパーが形成されている請求項１に記載の潤滑装置を備えたフォロア軸受。The lubricating member is formed with a contact portion that abuts against a mating rolling surface on which the outer ring of the follower bearing rolls. The follower bearing provided with the lubricating device according to claim 1, wherein a scraper is formed at a position facing and holding the lubrication device.

潤滑装置の潤滑部材が、潤滑油を含有した多孔質構造の焼結樹脂部材であることを特徴とする請求項１または請求項２に記載の潤滑装置を備えたフォロア軸受。The follower bearing provided with a lubricating device according to claim 1 or 2, wherein the lubricating member of the lubricating device is a sintered resin member having a porous structure containing lubricating oil.

潤滑装置の潤滑部材は、固形潤滑剤であることを特徴とする請求項１または請求項２に記載の潤滑装置を備えたフォロア軸受。The follower bearing provided with the lubrication device according to claim 1 or 2, wherein the lubrication member of the lubrication device is a solid lubricant.