JP4171865B2

JP4171865B2 - Ball row assembly equipment for double row ball bearings

Info

Publication number: JP4171865B2
Application number: JP2001017250A
Authority: JP
Inventors: 隆森崎
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2001-01-25
Filing date: 2001-01-25
Publication date: 2008-10-29
Anticipated expiration: 2021-01-25
Also published as: JP2002219623A

Description

【０００１】
【発明の属する技術の分野】
本発明は複列玉軸受の上側の溝（内外輪間の上側玉軌道溝）に規定数の玉を装入して組立を行う装置、特に前記軸受の上側玉列を下から支える上側玉支持治具を玉装入完了後スムーズに軸受外へ抜き取ることができるようにし、これによって安定的な自動組立を可能にした複列玉軸受の玉入れ組立装置に関する。
【０００２】
【従来の技術】
従来、この種の複列玉軸受の組立装置としては、例えば特公平１−１６６１６号公告公報に記載された複列玉軸受の組立装置、あるいは特公平７−９６１７６号公告公報に記載された複列玉軸受の組立装置および玉詰め治具構造が知られている。これらはいずれも、１組の軸受内外輪を立位状態（その中心軸線を鉛直にした状態）で保持台上に保持し、前記内外輪間の下列側の玉軌道溝に規定数の玉を装入した後、垂直なアームに連結した三ケ月状の玉支持部を上側から内外輪間の上側溝と下側溝との間、つまり上列側軌道溝の下側へ挿入し、この三ケ月状玉支持部の上縁に沿うように上側玉を装入し、その後、内外輪を互いの中心が一致するように径方向に相対移動させるとともに、前記玉支持部を上側玉の非占有部分へ旋回移動させて上方へ抜き出す構成となっている。ここで、上側玉を装入した時点で、上側玉が占めている内外輪間の円弧状の領域を上側玉の占有部分、他の部分を非占有部分と称することにする。玉数が多く三ケ月状玉支持部の円周方向長さが玉の非占有部分より長い場合は、前記玉支持部を対称形に２体に分割し、それぞれの片端に垂直なアームを連結し、一対の玉支持部を各々個別に前記非占有部分へ旋回移動させて抜き取るようにしている（特公平７−９６１７６号公報）。
【０００３】
【発明が解決しようとする課題】
上述したように、これらの複列玉軸受用玉詰め組立装置は、上側玉の玉詰めの後、内外輪を径方向に偏倚した状態から内外輪どおしの中心が一致した状態に位置合せし、玉支持部を玉の非占有部分へ旋回移動させて抜き取るという構成をとっているが、上列側の玉を下から支えている玉支持部を上方へ抜き出すのに必要な空間領域へ旋回させると、上側の玉が玉支持部に連れ動かされて前記非占有部分へ入り込む事態が発生する場合がある。内外輪の芯合せがなされた後は、前記玉は内外輪の溝内に拘束されて上方へは抜けないようになるため、前記玉が僅かの個数でも移動して前記玉支持部を上方へ抜き出すのに必要な空間領域に入り込むと、前記玉支持部が上側の玉と干渉して内外輪間から上方へ引き上げることができず、無理に抜去しようとすると前記玉支持部あるいはその連結アームの破損が生じたり、玉や軌道溝に傷付きが起こるなどの危険があり、これがこの種の複列玉軸受の自動化組立を行う上で問題となっていた。
【０００４】
本発明は、上側玉支持治具の玉支持部を玉非占有部分へ旋回移動させた際の玉の移動の問題を解決し、前記上側玉支持治具の破損をなくして安定的な自動化組立を可能とする複列玉軸受の玉入れ組立装置を提供することにある。
【０００５】
【課題を解決するための手段】
本発明によれば、複列玉軸受の上側玉列と下側玉列との間の内外輪間位置に旋回および上下動作する１体または一対の上側玉支持治具を挿入し、上側玉の規定数装入後、軸受内外輪の芯合せ状態で前記上側玉支持治具を前記上側玉の非占有部分から抜き取るようにした複列玉軸受の玉入れ組立装置において、前記玉支持治具の前記非占有部分側への旋回移動に伴なう前記上側玉の該非占有部分側への連れ動きを防止する玉移動防止手段を前記非占有部分に設けた玉入れ組立装置が提供される。前記玉移動防止手段としては、玉移動防止ピン等の受け部材、あるいは該受け部材と共に、噴射流体圧で玉の移動を防止するノズル装置を設け、場合によっては、前記玉移動防止手段として前記ノズル装置だけを設ける。
【０００６】
【作用】
本発明による複列玉軸受の玉入れ組立装置は、軸受内外輪を、その中心軸線が垂直になるように保持しかつ相対偏心状態から同心状態に相対移動させる軸受支持機構と、前記内外輪を偏心状態にして下列側の玉を組み込むために該玉を下側から支える三ケ月形状の下側突起と、上列側の玉を組み込むために内外輪間に挿入されかつ該玉を上側軌道溝の下側で支える旋回および上下動可能な三ケ月形状の上側玉支持部および該支持部から上方へ延びる連結アームと、内外輪間に挿抜可能でかつ上列側の玉の移動を防止するための、受け部材とノズル装置の少なくとも一方を含む玉移動防止手段と、玉入れ時および軸受内外輪を同心状態に相対移動させる際の上列側の玉の飛び出しを防ぐ玉ならし装置と、玉供給部とを有して構成されているため、軸受内外輪の偏心状態で上下溝に玉を入れ、内外輪を同心状態に相対移動させた後、上下列の玉の間に挿入されている前記玉支持部を周方向反対側の玉非占有部分へ旋回させる際に上列側の玉は前記玉移動防止手段により移動が阻止され、玉非占有部分へ入り込むことがなく、玉支持部は上列側の玉と干渉することなく軸受の上方へ抜去できる。
【０００７】
前記受け部材は任意の機構で内外輪間に出入するようになっている。前記玉支持部は一体形のものだけでなく、２体に分割した形態のものでもよい。
【０００８】
【発明の実施の形態】
次に、本発明を好適な実施形態について図面を参照して説明する。
図１は、本発明の１実施例に係る複列玉軸受の玉入れ組立装置を用いて上列側の玉を上側玉支持治具の玉支持部に支持した状態の平面図であり、図２は図１に示す実施例における玉入れ組立装置の要部正面断面図である。まず図２を参照すれば、玉供給シュート５の下方に内外輪保持台３および外輪偏倚・芯出装置６から成る軸受支持機構４が設けられている。保持台３は図示しない基台のレール上に載置され、この保持台３の上面に複列玉軸受の内輪２と外輪１が組み合った状態で保持されている。この実施例では、内輪２は保持台３の上面に形成された位置決め用短軸３ａと嵌合して位置決めされ、外輪偏倚・芯出機構６は位置固定された内輪２に対して外輪１を横方向に押動動作して径方向に拘束するようになっている。
【０００９】
さらに後述するように、上下列の溝１０，１１に玉７，８を供給するときは、外輪１は軸受支持機構４の偏倚・芯出機構６により内輪２に対し片側に寄せられた状態で上方の玉供給シュート５からそれぞれ規定数の玉が装入される。図示のように内外輪保持台３の上面には内外輪の間に入り込む上面視三ケ月状の下側玉支持用突起９が設けられ、下側玉８はこの突起９の上端に支持されて内外輪２，１間の下側溝１１の位置に保持される。
【００１０】
内輪２に対し略同軸線上で軸受の上方に、上下動作および軸線まわりの往復回転動作を行う作動部材１２が設けられている。作動部材１２の下端には上側玉支持治具１３が装着されている。上側玉支持治具１３は上面視で三ケ月状の水平な玉支持部材１５と、玉支持部材１５の片端に連結されかつ上方へ伸長する垂直アーム１６とで構成され、この垂直アーム１６の上端が作動部材１２の下端に固着されている。玉支持部材１５は下側の玉支持用突起９と同様に内外輪２，１の間に挿入されるが、玉支持部材１５の円周方向長さは図１，図２の状態において規定数の上列側の玉７を全数支持できる長さを有するとともに、後述する内外輪２，１の芯合せ時に上列側の玉７の非占有部分の円周方向長さより短かい長さに形成される。
【００１１】
上側玉支持治具１３に隣接して、内外輪２，１間に供給された玉７の飛び出しを防止する玉ならし装置１７が上下動作可能に図示しない上下動機構に設けられている。玉ならし装置１７の下面には同様に玉供給後に内外輪２，１間に入り込んで上列側の玉７を上から押さえる三ケ月状の玉ならし用突起１８が形成されている。
【００１２】
図１，図２の実施例で玉ならし装置１７にはＬ形に下方へ折曲した受け部材としての玉移動防止ピン１９（玉移動防止手段）が取り付けられている。玉ならし装置１７が下降し、玉移動防止ピン１９が内外輪２，１間に挿入されたときのピン位置は、その下端が、玉支持治具１３の旋回に伴ない連れ動いて非占有部分（後述）へ侵入しようとする上側玉７と係合する位置であり、かつ図１に示されるように、片側に寄せられた規定数の上側玉列の端部近くで、しかもこの玉列を支持しているときの上側玉支持治具１３の垂直アーム１６に隣接した位置となっている。また、上側玉支持治具１３が上側玉７の非占有部分（後述）へ旋回するときに垂直アーム１６がこの玉移動防止ピン１９と干渉しないようなピン径およびピン位置が定められる。なお、これらの条件を満たせば受け部材の形状は、本実施例のものに限定されず、また必ずしもピンでなくてもよい。また、垂直アーム１６と干渉しても、自身が変形して垂直アーム１６の旋回は妨げず、かつ上側玉７の移動は防止するような、例えばブラシ状の受け部材としてもい。
【００１３】
なお、作動部材１２の上下動機構および回転駆動機構、並びに玉ならし装置１７の上下動機構は特に限定されるものでなく、公知の機構および駆動手段が採用され得るが、例えば特公平１−１６６１６号、特公平７−９６１７６号公報に記載の構造が好適に用いられる。
【００１４】
内外輪２，１間の下側の軌道溝１１へ下側の玉８が規定数装入された後、外輪１が片側へ偏倚された状態で上側玉支持治具１３が降下し、上側玉支持部材１５が上側の軌道溝１０に隣接してその下側に入り（図２の破線位置）、この支持部材１５上に玉供給シュート５から供給された上列側の規定数の玉７が支持される。そして玉ならし装置１７が降下して上列側の玉７の上面を押えるとともに、該ならし装置１７に保持されたピン１９が内外輪２，１間に挿入される。その後、外輪偏倚・芯出機構６によって外輪１が径方向に押動され、内外輪２，１の中心が合致される。この状態で上側玉支持治具１３が軸受中心まわりに旋回し、その上側玉支持部材１５が上側玉７の非占有部分２０にもたらされ（図３の状態）、内外輪２，１の間から上方へ抜き出される。上側玉支持部材１５が前記非占有部分２０へ旋回するときに、上側の玉列の末端部では、玉７は玉移動防止ピン１９によって上側玉支持部材１５の旋回方向への移動が阻止され、またこれと反対側の玉列末端部は前記治具１３の垂直アーム１６に阻止されて非占有部分２０に玉７が入り込むことがなく、上側玉支持部材１５は玉７と何ら干渉せずに抜去される。また、玉移動防止ピン１９があるため、内外輪２，１の芯合せと垂直アーム１６の旋回を同時に行うようにしても確実に上側玉７の前記非占有部分２０への侵入が防止される。玉移動防止ピン１９は、上側玉支持部材１５を軸受内部から抜き出した後、玉ならし装置１７が上方へ退避することにより、同時に軸受内部から抜き出される。
【００１５】
図４に示すような従来の玉詰め組立装置では、規定数装填された上列側の玉７を円周方向に規制する手段がないために、上側玉支持部材１５が同図の矢印方向に旋回して玉７の非占有部分２０に移動したとき、上側の玉７が前記支持部材１５に連れ動いて非占有部分２０に入り込むことがあり、この状態では内外輪２，１間の軌道溝に拘束された非占有部分２０の玉７と干渉して前記支持部材１５を上方へ引き抜くことができないが、本発明によれば、このような事態は発生しない。
【００１６】
図５は本発明の他の実施例を示す図１と同様部分の平面図である。この実施例では前記玉ならし装置１７（図２）とともに上下動する玉移動防止ピン１９に加えて、流体噴射ノズル装置２１（玉移動防止手段）が前記ピン１９の近傍に設けられ、上側玉支持部材１５が玉非占有部分２０へ旋回移動する際に、このノズル装置２１から上側玉７の玉列の末端部に向けてエアが噴射され、このときの噴射流体圧で玉７が非占有部分２０へ移動するのが防止される。この場合もノズル装置２１は上側玉支持部材１５が旋回するときに垂直アーム１６と干渉しないように配置され、また玉詰めの完了した軸受を次工程へ搬送するときに邪魔にならないように前記上側玉支持治具と連動して前記軸受に対して進入、退避するようにしてもよい。
【００１７】
図５の実施例のように玉移動防止ピン１９とノズル装置２１とを併用することにより、玉７の非占有部分２０への移動防止は一層確実になるが、例えば小径の複列玉軸受の場合など、ノズルから噴射される流体のみにより玉の移動が阻止できれば玉移動防止ピン１９を省略し、ノズル装置２１のみにより玉７の移動を防止するようにしてもよい。また、流体としてエアを用いたが、空気以外の気体、あるいは油等の液体を用いてもよい。
【００１８】
図６は本発明のさらに他の実施例による玉入れ装置を示したものであり、図１と同様の部分における平面図である。また図７は図６の実施例に適用される上側玉支持治具の一例を示す斜視図である。図１の実施例において、上側の溝への玉装入後の非占有部分の円周方向長さが玉規定数長さよりも長い場合は上側玉支持部材１５を軸受内外輪２，１の間から抜き取ることができるが、玉７の非占有部分２０の円周方向長さが玉規定数長さよりも短かい軸受に対しては上側玉支持部材１５が玉列の両端部分と干渉して上方へ抜き出せない。このような場合は図７に示すように対称形に２体に分割した上側玉支持治具２２が使用される。各々の玉支持部材２３，２４は三ケ月状に形成され、かつ各々の片端部から垂直アーム２５，２６が上方へ伸長し、個別に上下動作および回転動作する作動部材に連結される。アーム２５，２６の位置と反対側の三ケ月状玉支持部材２３，２４の端部２３ａ，２４ａどおしが対接した状態では、玉支持部材２３，２４の上縁は玉規定数長さをカバーできる長さとなるが、玉非占有部分ではそれぞれ片側単独の玉支持部材２３または２４が玉列と干渉せずに位置するように構成されている。
【００１９】
したがって、このような分割形玉支持部材２３，２４を抜き取る場合は、どちらか一方の玉支持部材２３を先に玉非占有部分から抜去した後、他方の玉支持部材２４を玉非占有部分へ旋回させて抜き取るという方法がとられる。両側の玉支持部材２３，２４の旋回方向は互いに逆向きとなる。
【００２０】
図６，図７の実施例で、２個の旋回および上下動作する垂直アーム２５，２６に連結された三ケ月状玉支持部材２３，２４に対応するため、玉移動防止ピン１９，２７がそれぞれ玉支持部材２３，２４の垂直アーム２５，２６の近傍の上側軌道溝に挿入されるようになっている。これらのピン１９，２７が玉支持部材２３，２４を個別に旋回移動（互いに逆向き）させた際に、対応する玉列の末端部で玉７と係合して玉が非占有部に移動するのが防止され、それぞれの玉支持部材２３，２４は安全に前記非占有部分から上方へ抜き出すことができる。
【００２１】
なお、本実施例ではピン１９，２７を前記上側玉７の占有部分と非占有部分との境界近傍に挿入するようにしているが、垂直アーム２５，２６を旋回後、玉支持部材２３，２４の上方への抜き出しが可能であればよいので、ピン１９，２７の挿入位置は、この条件を満たせば、非占有部分内の他の位置でもよい。
【００２２】
図６の実施例でも一対の玉移動防止ピン１９，２７と併用して図５で説明したノズル装置を玉非占有部分の周方向両端近傍に臨ませるようにすることができ、また場合によっては、ノズル装置のみを設けてその流体噴射により玉の移動を防止するようにしてもよい。また、いずれの実施例でも、受け部材（実施例においては玉移動防止ピン１９，２７）は前記玉ならし装置に連結する形態に限定されず、その他の独立した往復動機構に支持されて軸受内外輪に出入するようにしてもよい。この場合も前記受け部材は玉支持部材の旋回および上下動作と連動して動作するように構成され得る。
さらに、受け部材が旋回アーム１６だけでなく玉支持治具１３とも干渉しないようにすることが可能であれば、受け部材を例えば下側玉支持治具９に立設するか、保持台３上面から出入り可能な構成とするようにしてもよい。
【００２３】
【発明の効果】
以上説明したように本発明によれば、玉の非占有部分の端部近傍に出入可能に設けた玉移動防止用の受け部材（例えばピン部材）あるいは流体噴射ノズル装置、あるいはこれらを組み合せた構造の玉移動防止手段により、玉支持治具の玉支持部が内外輪間から上方へ退避するための空間即ち玉非占有部分へ上側玉が入り込むのが阻止され、前記玉支持治具を破損することなく軸受内部から安全確実に抜去することが可能となり、この種の複列玉軸受における自動化組立の信頼性を向上させることができるなど、大きな効果がもたらされる。
【図面の簡単な説明】
【図１】本発明の１実施例に係る複列玉軸受の玉入れ組立装置を用いて上列側の玉を上側玉支持治具の玉支持部に支持した状態の平面図である。
【図２】図１に示す実施例における玉入れ組立装置の要部正面断面図である。
【図３】図１に示す実施例で玉支持部材の抜き取り時における玉非占有部分と玉支持部材の位置関係を示す平面図である。
【図４】従来の玉入れ装置で玉非占有部分の玉支持部材上に玉が入り込んだ状態を示す平面図である。
【図５】本発明の他の実施例を示す図１と同様部分の平面図である。
【図６】分割形玉支持治具を使用した本発明の実施例を示す図１と同様部分の平面図である。
【図７】図６の実施例における分割形玉支持治具の斜視図である。
【符号の説明】
１外輪
２内輪
４軸受支持機構
５玉供給シュート
９下側玉支持用突起
１２作動部材
１３，２２上側玉支持治具
１５，２３，２４玉支持部材
１６，２５，２６垂直アーム
１７玉ならし装置
１９，２７玉移動防止ピン
２０玉非占有部分
２１ノズル装置[0001]
[Field of the Invention]
The present invention relates to a device for assembling by inserting a specified number of balls into the upper groove (the upper ball raceway groove between the inner and outer rings) of the double row ball bearing, in particular, the upper ball support for supporting the upper ball row of the bearing from below. The present invention relates to a ball assembly apparatus for a double row ball bearing that enables a jig to be smoothly removed from the bearing after completion of ball insertion, thereby enabling stable automatic assembly.
[0002]
[Prior art]
Conventionally, as an assembly apparatus for this type of double row ball bearing, for example, an assembly apparatus for a double row ball bearing described in Japanese Patent Publication No. 1-161616 or a composite apparatus described in Japanese Patent Publication No. 7-96176 2. Description of the Related Art An assembly device for a ball bearing and a ball stuffing jig structure are known. Both of these hold a pair of bearing inner and outer rings on a holding stand in a standing state (with their central axis vertical), and place a prescribed number of balls in the ball raceway grooves on the lower row side between the inner and outer rings. After insertion, insert the crescent-shaped ball support connected to the vertical arm from the upper side between the upper and lower grooves between the inner and outer rings, that is, below the upper row raceway groove. The upper ball is inserted along the upper edge of the support portion, and then the inner and outer rings are moved relative to each other in the radial direction so that their centers coincide with each other, and the ball support portion is turned to the unoccupied portion of the upper ball. It is configured to be moved and extracted upward. Here, when the upper ball is inserted, the arc-shaped region between the inner and outer rings occupied by the upper ball is referred to as an occupied portion of the upper ball, and the other portion is referred to as a non-occupied portion. If the number of balls is large and the circumferential length of the crescent-shaped ball support is longer than the non-occupied portion of the ball, the ball support is divided into two symmetrically, and a vertical arm is connected to each end. The pair of ball support portions are individually pivoted to the unoccupied portion and extracted (Japanese Patent Publication No. 7-96176).
[0003]
[Problems to be solved by the invention]
As described above, these double row ball bearing ball assembling devices are aligned from the state in which the inner and outer rings are radially displaced from the state in which the inner and outer rings are radially displaced after the upper ball is packed. The ball support part is swung to the non-occupied part of the ball and extracted, but the ball support part supporting the ball on the upper row side from the bottom is taken up to the space area required to extract upward. When turning, the upper ball may be moved by the ball support portion and enter the unoccupied portion. After the inner and outer rings are aligned, the balls are restrained in the grooves of the inner and outer rings so that they do not come out upward. Therefore, even a small number of the balls move and the ball support portion moves upward. When entering the space area necessary for extraction, the ball support portion interferes with the upper ball and cannot be lifted upward from between the inner and outer rings, and when trying to forcibly remove it, the ball support portion or its connecting arm There are dangers such as breakage and damage to the balls and raceway grooves, and this has been a problem in the automated assembly of this type of double row ball bearings.
[0004]
The present invention solves the problem of ball movement when the ball support portion of the upper ball support jig is swung to the non-occupied portion of the ball, and eliminates the damage of the upper ball support jig and enables stable automated assembly. It is an object of the present invention to provide a ball tray assembly device for a double row ball bearing that enables the above.
[0005]
[Means for Solving the Problems]
According to the present invention, one or a pair of upper ball support jigs that turn and move up and down is inserted between the inner and outer ring positions between the upper and lower ball rows of the double row ball bearing, In a ball assembly apparatus for a double row ball bearing in which the upper ball support jig is removed from the non-occupied portion of the upper ball in a state where the inner and outer rings of the bearing are aligned, There is provided a ball holder assembling apparatus provided with ball movement preventing means for preventing movement of the upper ball to the unoccupied part side accompanying the turning movement to the unoccupied part side in the unoccupied part. As the ball movement prevention means, a receiving member such as a ball movement prevention pin, or a nozzle device that prevents movement of the ball by jet fluid pressure is provided together with the receiving member, and in some cases, the nozzle movement prevention means includes the nozzle Only equipment is provided.
[0006]
[Action]
A ball assembly assembly apparatus for a double row ball bearing according to the present invention includes a bearing support mechanism for holding a bearing inner and outer rings so that a central axis thereof is vertical and relatively moving the inner and outer rings from a relative eccentric state to a concentric state, and the inner and outer rings. A crescent-shaped lower projection that supports the ball from the lower side in order to incorporate the lower row ball in an eccentric state, and inserted between the inner and outer rings to incorporate the upper row ball, and the ball is inserted into the upper raceway groove. A crescent-shaped upper ball support portion that can be swiveled and moved up and down supported on the lower side, a connecting arm that extends upward from the support portion, and a ball that can be inserted and removed between the inner and outer rings and prevents the movement of the balls on the upper row side , Ball movement preventing means including at least one of a receiving member and a nozzle device, a ball leveling device that prevents the upper row side balls from popping out when the balls are inserted and the inner and outer rings of the bearing are moved relative to each other in a concentric state, and a ball supply unit Because it is configured with Inserting balls into the upper and lower grooves in the eccentric state of the bearing inner and outer rings, and moving the inner and outer rings relative to each other in a concentric state, the non-occupied balls on the opposite side in the circumferential direction are inserted between the upper and lower rows of balls. When the ball is swung to the part, the upper row side ball is prevented from moving by the ball movement preventing means and does not enter the non-occupied portion of the ball, and the ball support portion does not interfere with the upper row side ball. Can be removed.
[0007]
Before Symbol receiving member is adapted to and from between the inner and outer rings in any mechanism. The ball support portion is not limited to an integral type, and may be divided into two.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a state in which upper row balls are supported by a ball support portion of an upper ball support jig using a ball holder assembly device for a double row ball bearing according to one embodiment of the present invention. 2 is a front cross-sectional view of a main part of the ball assembly apparatus in the embodiment shown in FIG. First, referring to FIG. 2, a bearing support mechanism 4 including an inner / outer ring holding base 3 and an outer ring biasing / centering device 6 is provided below the ball supply chute 5. The holding table 3 is placed on a rail of a base (not shown), and the inner ring 2 and the outer ring 1 of the double row ball bearing are held on the upper surface of the holding table 3 in a combined state. In this embodiment, the inner ring 2 is positioned by fitting with a positioning short shaft 3 a formed on the upper surface of the holding table 3, and the outer ring biasing / centering mechanism 6 moves the outer ring 1 to the fixed inner ring 2. It is pushed in the lateral direction and restrained in the radial direction.
[0009]
Further, as will be described later, when the balls 7 and 8 are supplied to the upper and lower grooves 10 and 11, the outer ring 1 is brought to one side with respect to the inner ring 2 by the biasing and centering mechanism 6 of the bearing support mechanism 4. A specified number of balls are charged from the upper ball supply chute 5. As shown in the drawing, a lower ball supporting projection 9 having a crescent-shaped top view that penetrates between the inner and outer rings is provided on the upper surface of the inner / outer ring holding base 3, and the lower ball 8 is supported by the upper ends of the projections 9 It is held at the position of the lower groove 11 between the rings 2 and 1.
[0010]
An actuating member 12 that performs vertical movement and reciprocating rotation around the axis is provided on the substantially coaxial line and above the bearing with respect to the inner ring 2. An upper ball support jig 13 is attached to the lower end of the operating member 12. The upper ball support jig 13 is composed of a crescent-shaped horizontal ball support member 15 as viewed from above and a vertical arm 16 connected to one end of the ball support member 15 and extending upward. It is fixed to the lower end of the actuating member 12. The ball support member 15 is inserted between the inner and outer rings 2 and 1 in the same manner as the lower ball support protrusion 9, but the circumferential length of the ball support member 15 is a specified number in the state of FIGS. 1 and 2. It has a length that can support all the balls 7 on the upper row side and is shorter than the circumferential length of the non-occupied portion of the balls 7 on the upper row side when aligning the inner and outer rings 2, 1 described later. Is done.
[0011]
Adjacent to the upper ball support jig 13, a ball leveling device 17 for preventing the ball 7 supplied between the inner and outer rings 2 and 1 from jumping out is provided in a vertical movement mechanism (not shown) so as to be movable up and down. Similarly, on the lower surface of the ball leveling device 17, a crescent-shaped ball leveling projection 18 is formed which enters between the inner and outer rings 2, 1 after supplying the ball and presses the upper row side ball 7 from above.
[0012]
1 and 2, the ball leveling device 17 is provided with a ball movement prevention pin 19 (ball movement prevention means) as a receiving member bent downward in an L shape. When the ball leveling device 17 is lowered and the ball movement prevention pin 19 is inserted between the inner and outer rings 2 and 1, the lower end of the pin is moved along with the turning of the ball support jig 13 and is not occupied. This position is a position that engages with the upper ball 7 that is about to enter a portion (described later) and, as shown in FIG. 1, near the end of the prescribed number of upper ball rows that are brought to one side. Is located adjacent to the vertical arm 16 of the upper ball support jig 13. Further, the pin diameter and the pin position are determined so that the vertical arm 16 does not interfere with the ball movement preventing pin 19 when the upper ball support jig 13 turns to an unoccupied portion (described later) of the upper ball 7. If these conditions are satisfied, the shape of the receiving member is not limited to that of the present embodiment, and is not necessarily a pin. Further, even if it interferes with the vertical arm 16, it may be a brush-shaped receiving member that deforms itself and does not prevent the vertical arm 16 from turning and prevents the upper ball 7 from moving.
[0013]
The vertical movement mechanism and the rotational drive mechanism of the actuating member 12 and the vertical movement mechanism of the ball leveling device 17 are not particularly limited, and known mechanisms and driving means may be employed. The structures described in Japanese Patent No. 16616 and Japanese Patent Publication No. 7-96176 are preferably used.
[0014]
After a prescribed number of lower balls 8 are inserted into the lower raceway groove 11 between the inner and outer rings 2 and 1, the upper ball support jig 13 is lowered while the outer ring 1 is biased to one side, and the upper balls The support member 15 is adjacent to the upper raceway groove 10 and enters the lower side thereof (the position indicated by the broken line in FIG. 2), and a predetermined number of balls 7 on the upper row side supplied from the ball supply chute 5 are placed on the support member 15. Supported. Then, the ball leveling device 17 descends and presses the upper surface of the upper row side ball 7, and the pin 19 held by the leveling device 17 is inserted between the inner and outer rings 2 and 1. Thereafter, the outer ring 1 is pushed in the radial direction by the outer ring biasing and centering mechanism 6 so that the centers of the inner and outer rings 2 and 1 are matched. In this state, the upper ball support jig 13 turns around the center of the bearing, and the upper ball support member 15 is brought to the unoccupied portion 20 of the upper ball 7 (the state shown in FIG. 3). It is extracted upward from. When the upper ball support member 15 turns to the non-occupied portion 20, the ball 7 is prevented from moving in the turning direction of the upper ball support member 15 by the ball movement prevention pin 19 at the end of the upper ball row, Further, the ball row end on the opposite side is blocked by the vertical arm 16 of the jig 13 so that the ball 7 does not enter the unoccupied portion 20, and the upper ball support member 15 does not interfere with the ball 7 at all. Extracted. Further, since the ball movement preventing pin 19 is provided, the upper ball 7 is reliably prevented from entering the unoccupied portion 20 even if the inner and outer rings 2, 1 are aligned and the vertical arm 16 is turned at the same time. . The ball movement prevention pin 19 is simultaneously extracted from the inside of the bearing when the upper ball support member 15 is extracted from the inside of the bearing and then the ball leveling device 17 is retracted upward.
[0015]
In the conventional ball assembling apparatus as shown in FIG. 4, since there is no means for regulating the upper row side balls 7 loaded with a specified number in the circumferential direction, the upper ball support member 15 is arranged in the direction of the arrow in FIG. When turning and moving to the unoccupied portion 20 of the ball 7, the upper ball 7 may move along with the support member 15 and enter the unoccupied portion 20, and in this state, the raceway groove between the inner and outer rings 2,1 The support member 15 cannot be pulled upward due to interference with the balls 7 of the unoccupied portion 20 constrained by the above, but according to the present invention, such a situation does not occur.
[0016]
FIG. 5 is a plan view of the same portion as FIG. 1 showing another embodiment of the present invention. In this embodiment, in addition to the ball movement prevention pin 19 that moves up and down together with the ball leveling device 17 (FIG. 2), a fluid ejection nozzle device 21 (ball movement prevention means) is provided in the vicinity of the pin 19 and the upper ball When the support member 15 pivots to the ball non-occupied portion 20, air is jetted from the nozzle device 21 toward the end of the ball row of the upper ball 7, and the ball 7 is not occupied by the jet fluid pressure at this time. Moving to the part 20 is prevented. Also in this case, the nozzle device 21 is arranged so as not to interfere with the vertical arm 16 when the upper ball support member 15 is swung, and the upper device so as not to interfere with the transfer of the ball-packed bearing to the next process. You may make it approach and retract | save with respect to the said bearing interlock | cooperating with a ball | bowl support jig | tool.
[0017]
By using the ball movement prevention pin 19 and the nozzle device 21 together as in the embodiment of FIG. 5, the movement of the ball 7 to the unoccupied portion 20 is further reliably prevented. In some cases, if the movement of the ball can be prevented only by the fluid ejected from the nozzle, the ball movement prevention pin 19 may be omitted, and the movement of the ball 7 may be prevented only by the nozzle device 21. Further, although air is used as the fluid, a gas other than air or a liquid such as oil may be used.
[0018]
FIG. 6 shows a beading device according to still another embodiment of the present invention, and is a plan view of the same portion as FIG. FIG. 7 is a perspective view showing an example of an upper ball support jig applied to the embodiment of FIG. In the embodiment of FIG. 1, when the circumferential length of the unoccupied portion after the ball is inserted into the upper groove is longer than the prescribed number of balls, the upper ball support member 15 is placed between the bearing inner and outer rings 2 and 1. The upper ball support member 15 interferes with both end portions of the ball row and moves upward with respect to the bearing whose circumferential length of the unoccupied portion 20 of the ball 7 is shorter than the prescribed number of balls. I can't pull out. In such a case, as shown in FIG. 7, the upper ball support jig 22 divided into two bodies symmetrically is used. Each of the ball support members 23 and 24 is formed in a crescent shape, and the vertical arms 25 and 26 extend upward from one end of each of the ball support members 23 and 24, and are individually connected to an operation member that moves up and down and rotates. In the state where the ends 23a, 24a of the crescent-shaped ball support members 23, 24 on the opposite side to the positions of the arms 25, 26 are in contact with each other, the upper edges of the ball support members 23, 24 have the prescribed number of balls. Although it is a length that can be covered, the ball support member 23 or 24 on one side alone is positioned so as not to interfere with the ball row in each non-occupied portion of the ball.
[0019]
Therefore, when such split-type ball support members 23, 24 are extracted, after one of the ball support members 23 is first removed from the non-occupied portion of the ball, the other ball support member 24 is moved to the non-occupied portion of the ball. The method of turning and extracting is taken. The turning directions of the ball support members 23 and 24 on both sides are opposite to each other.
[0020]
6 and 7, in order to correspond to the crescent-shaped ball support members 23 and 24 connected to the two vertical arms 25 and 26 that swing and move up and down, the ball movement prevention pins 19 and 27 are respectively balls. The support members 23 and 24 are inserted into the upper raceway grooves in the vicinity of the vertical arms 25 and 26. When these pins 19 and 27 individually turn the ball support members 23 and 24 (in opposite directions), the balls engage with the balls 7 at the end portions of the corresponding ball rows and the balls move to the non-occupied portions. The ball support members 23 and 24 can be safely extracted upward from the unoccupied portion.
[0021]
In this embodiment, the pins 19 and 27 are inserted in the vicinity of the boundary between the occupied part and the non-occupied part of the upper ball 7, but after turning the vertical arms 25 and 26, the ball support members 23 and 24 are rotated. As long as it can be extracted upward, the insertion positions of the pins 19 and 27 may be other positions in the unoccupied portion as long as this condition is satisfied.
[0022]
In the embodiment of FIG. 6 as well, the nozzle device described in FIG. 5 can be made to face the vicinity of both ends in the circumferential direction of the ball non-occupied portion in combination with the pair of ball movement preventing pins 19 and 27. Alternatively, only the nozzle device may be provided, and the movement of the ball may be prevented by the fluid ejection. In any of the embodiments, the receiving member (in the embodiment, the ball movement preventing pins 19 and 27) is not limited to the form connected to the ball leveling device, and is supported by another independent reciprocating mechanism to be a bearing. You may make it go in and out of the inner and outer rings. In this case as well, the receiving member may be configured to operate in conjunction with the turning and up / down movement of the ball support member.
Furthermore, if it is possible to prevent the receiving member from interfering with not only the swivel arm 16 but also the ball support jig 13, for example, the receiving member is erected on the lower ball support jig 9 or the upper surface of the holding table 3. You may make it the structure which can enter / exit.
[0023]
【The invention's effect】
As described above, according to the present invention, a ball movement preventing receiving member (for example, a pin member) or a fluid jet nozzle device provided in the vicinity of the end of the non-occupied portion of the ball, or a structure in which these are combined The ball movement prevention means prevents the ball support portion of the ball support jig from retreating upward from between the inner and outer rings, that is, prevents the upper ball from entering the non-occupied portion of the ball and damages the ball support jig. Therefore, it is possible to safely and reliably remove the bearing from the inside without increasing the reliability of automated assembly in this type of double-row ball bearing.
[Brief description of the drawings]
FIG. 1 is a plan view of a state in which upper row balls are supported by a ball support portion of an upper ball support jig using a ball holder assembly device for a double row ball bearing according to one embodiment of the present invention.
FIG. 2 is a front cross-sectional view of a main part of the ball case assembling apparatus in the embodiment shown in FIG. 1;
3 is a plan view showing a positional relationship between a ball non-occupied portion and a ball support member when the ball support member is extracted in the embodiment shown in FIG. 1; FIG.
FIG. 4 is a plan view showing a state in which a ball enters a ball support member in a non-occupied portion of the ball with a conventional ball holder.
FIG. 5 is a plan view of the same portion as FIG. 1 showing another embodiment of the present invention.
6 is a plan view of the same portion as FIG. 1 showing an embodiment of the present invention using a split ball support jig. FIG.
7 is a perspective view of a split ball support jig in the embodiment of FIG. 6. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 4 Bearing support mechanism 5 Ball supply chute 9 Lower ball support protrusion 12 Actuating members 13, 22 Upper ball support jigs 15, 23, 24 Ball support members 16, 25, 26 Vertical arm 17 Ball leveling device 19, 27 Ball movement prevention pin 20 Ball non-occupied portion 21 Nozzle device

Claims

Insert a single body or a pair of upper ball support jigs that turn and move up and down at the position between the inner and outer rings between the upper and lower ball rows of the double row ball bearing, and after loading the prescribed number of upper balls, In a ball assembly apparatus for a double row ball bearing in which the upper ball support jig is extracted from the non-occupied portion of the upper ball in a state where the inner and outer rings of the bearing are aligned, to the non-occupied portion side of the ball support jig. A ball movement preventing means for preventing the upper balls from being moved toward the unoccupied portion accompanying the turning movement of the upper ball is provided in the unoccupied portion. A ball holder assembly apparatus for a double row ball bearing, comprising a receiving member provided in a position between the occupied portion and the non-occupied portion and detachable .

The ball movement preventing means includes a nozzle device that ejects fluid toward a terminal portion of the upper ball row at a position between an occupied portion and an unoccupied portion of the upper ball row when the upper ball is loaded. 2. A ball assembly apparatus for a double row ball bearing according to claim 1.

Insert a single body or a pair of upper ball support jigs that turn and move up and down at the position between the inner and outer rings between the upper and lower ball rows of the double row ball bearing, and after loading the prescribed number of upper balls, In a ball assembly apparatus for a double row ball bearing in which the upper ball support jig is extracted from the non-occupied portion of the upper ball in a state where the inner and outer rings of the bearing are aligned, to the non-occupied portion side of the ball support jig. A ball movement preventing means for preventing the upper balls from being moved toward the unoccupied portion accompanying the turning movement of the upper ball is provided in the unoccupied portion. A device for assembling a ball bearing assembly for a double row ball bearing, comprising a nozzle device that injects fluid toward the end portion of the upper ball row at a position between the occupied portion and the unoccupied portion of the upper ball row.