JP5376310B2 - Synthetic resin cage and deep groove ball bearing for deep groove ball bearings - Google Patents

Synthetic resin cage and deep groove ball bearing for deep groove ball bearings Download PDF

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JP5376310B2
JP5376310B2 JP2009166411A JP2009166411A JP5376310B2 JP 5376310 B2 JP5376310 B2 JP 5376310B2 JP 2009166411 A JP2009166411 A JP 2009166411A JP 2009166411 A JP2009166411 A JP 2009166411A JP 5376310 B2 JP5376310 B2 JP 5376310B2
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cage
split
deep groove
pocket
groove ball
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JP2011021661A (en
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崇 上野
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NTN Corp
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NTN Corp
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Priority to JP2009166411A priority Critical patent/JP5376310B2/en
Priority to EP10792025.8A priority patent/EP2447557B1/en
Priority to US13/321,854 priority patent/US8939044B2/en
Priority to PCT/JP2010/060364 priority patent/WO2010150707A1/en
Priority to CN201080027562.5A priority patent/CN102803767B/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin holder for a deep groove ball bearing capable of improving lubricating properties. <P>SOLUTION: At one side in the axial direction of a first cylindrical split holder 41, the other side in the axial direction of the second cylindrical split holder 42 is assembled, and notches 45 and 50 forming a pocket for holding a ball with both split holders 41 and 42 assembled are formed at a one-side surface in the axial direction of the first split holder 41 and at the other-side surface in the axial direction of the second split holder 42 with a space in the circumferential direction. Between the first split holder 41 and the second split holder 42, a connection part X for the non-separation of both split holders 41 and 42 in the axial direction by means of engagement when both the split holders 41 and 42 are assembled is provided. After assembled to a deep groove ball bearing, when an outer race 11 and an inner race 21 relatively rotate, pump action is generated in the bearing due to the difference of the circumferential speed caused by the difference of the diameters between the first split holder 41 and the second split holder 42, and lubricating oil is forcedly made to flow in the bearing. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

この発明は、深みぞ玉軸受用の合成樹脂製保持器およびその保持器を用いた深みぞ玉軸受に関する。   The present invention relates to a synthetic resin cage for a deep groove ball bearing and a deep groove ball bearing using the cage.

一般に、自動車のトランスミッションにおいては、回転トルクの伝達にヘリカルギヤが採用されているため、そのヘリカルギヤを支持するシャフトには、回転時にラジアル荷重とスラスト荷重が負荷されることになる。   Generally, in a transmission of an automobile, a helical gear is used for transmission of rotational torque, and thus a radial load and a thrust load are applied to a shaft that supports the helical gear during rotation.

そこで、トランスミッションにおいては、普通、円すいころ軸受を用いてシャフトを支持するようにしているが、その円すいころ軸受においては負荷容量が大きいため、損失トルクの少ない深みぞ玉軸受が使用されるケースが多くなってきている。   Therefore, in a transmission, a tapered roller bearing is usually used to support the shaft. However, since the tapered roller bearing has a large load capacity, there is a case where a deep groove ball bearing with a small loss torque is used. It is getting more.

ここで、深みぞ玉軸受においては、外輪と内輪間に組込まれたボールを保持器により保持しており、その保持器として、金属製のものや、例えば、特許文献１に記載されているように、合成樹脂製のものが採用されている。   Here, in the deep groove ball bearing, the ball assembled between the outer ring and the inner ring is held by a cage, and the cage is made of metal or, for example, described in Patent Document 1 Furthermore, those made of synthetic resin are employed.

特開２００６−２５８１７２号公報JP 2006-258172 A

ところで、深みぞ玉軸受に採用されている上記のいずれの保持器も、単にボールを保持する機能しか有しないため、円すいころ軸受に比較して通油性（潤滑性）に劣り、トランスミッションのような高荷重下や高速回転下での使用においては、発熱し易く、耐久性に問題があり、改善すべき点が残されている。   By the way, any of the above cages used in the deep groove ball bearings has only a function of holding the balls, so that it is inferior in oil permeability (lubricity) compared to the tapered roller bearings, and is similar to a transmission. In use under high load or high speed rotation, heat is easily generated, there is a problem in durability, and there are points to be improved.

この発明の課題は、潤滑性の向上を図ることができるようにした深みぞ玉軸受用の合成樹脂製保持器および深みぞ玉軸受を提供することである。   An object of the present invention is to provide a synthetic resin cage for a deep groove ball bearing and a deep groove ball bearing that can improve lubricity.

上記の課題を解決するために、この発明に係る深みぞ玉軸受用の合成樹脂製保持器においては、合成樹脂の成形品からなる円筒形の第１分割保持器と、その第１分割保持器の内側に挿入される合成樹脂製の円筒形の第２分割保持器からなり、前記第１分割保持器の軸方向一側面と第２分割保持器の軸方向他側面に、その両分割保持器を内外に組み合わせた状態でボール保持用の円形のポケットを形成する切欠部を周方向に間隔をおいて設け、前記第１分割保持器と第２分割保持器が円形のポケットを形成する組み合わせ状態で、その両分割保持器を軸方向に非分離とする連結手段を設けた構成を採用したのである。   In order to solve the above-described problems, a synthetic resin cage for a deep groove ball bearing according to the present invention includes a cylindrical first divided cage made of a synthetic resin molded product, and the first divided cage. The second split cage is made of a synthetic resin and is inserted into the inner side of the first split cage, and the two split cages are provided on one axial side surface of the first split cage and the other axial side surface of the second split cage. A combined state in which notches are formed at intervals in the circumferential direction to form a circular pocket for holding a ball in a state in which the inner and outer portions are combined, and the first divided holder and the second divided holder form a circular pocket. Therefore, a configuration provided with connecting means for making the both split cages non-separable in the axial direction is adopted.

また、この発明に係る深みぞ玉軸受においては、内径面に軌道溝が形成された外輪と、外径面に軌道溝が形成された内輪と、外輪の軌道溝と内輪の軌道溝間に組込まれたボールと、そのボールを保持する保持器とからなる深みぞ玉軸受において、前記保持器として、上記の合成樹脂製保持器を採用した構成としたのである。   Further, in the deep groove ball bearing according to the present invention, the outer ring having the raceway groove formed on the inner diameter surface, the inner ring having the raceway groove formed on the outer diameter surface, and the raceway groove of the outer ring and the raceway groove of the inner ring are incorporated. In the deep groove ball bearing composed of the above balls and a cage for holding the balls, the above-mentioned synthetic resin cage is adopted as the cage.

上記の構成からなる深みぞ玉軸受の組立てに際しては、外輪と内輪間にボールを組込んだ後、外輪と内輪の一側方から軸受内部に第１分割保持器を、その第１分割保持器に形成された切欠部内にボールが収容されるように挿入し、かつ、外輪と内輪間の他側方から軸受内部に第２分割保持器を、その第２分割保持器に形成された切欠部内にボールが収容されるように挿入して、第１分割保持器の軸方向の一側部内に第２分割保持器の軸方向の他側部を嵌合して、連結手段により、その両分割保持器を連結する。   When assembling the deep groove ball bearing having the above structure, after assembling the ball between the outer ring and the inner ring, the first divided cage is placed inside the bearing from one side of the outer ring and the inner ring. The second split cage is inserted into the bearing from the other side between the outer ring and the inner ring, and the second split cage is formed in the notch portion formed in the second split cage. Is inserted so that the ball is accommodated in the first split cage, the other axial portion of the second split cage is fitted into one axial side of the first split cage, and the both splits are made by the connecting means. Connect the cage.

上記深みぞ玉軸受を用いて、例えば、トランスミッションのインプットシャフト等のトルク伝達シャフトを支持し、その支持状態において、トルク伝達シャフトが回転し、外輪と内輪が相対回転すると、ボールは自転しつつ公転し、その公転により、保持器も回転し、外輪と内輪間に潤滑油が介在していると、その潤滑油は保持器との接触によって連れ回されることになる。   The deep groove ball bearing is used to support, for example, a torque transmission shaft such as an input shaft of a transmission. When the torque transmission shaft rotates in the supported state and the outer ring and the inner ring rotate relative to each other, the ball rotates and revolves. However, due to the revolution, the cage also rotates, and when the lubricating oil is interposed between the outer ring and the inner ring, the lubricating oil is rotated by contact with the cage.

このとき、第１分割保持器と第２分割保持器は外径が異なるため、周速に差が生じ、第１分割保持器との接触によって連れ回わされる潤滑油の流れは第２分割保持器との接触によって連れ回される潤滑油の流れより速くなり、流れの速い側に流れの遅い側の潤滑油が引き寄せられて、軸受内部にポンプ作用が生じる。そのポンプ作用により潤滑油が軸受内部を一方向に流動し、深みぞ玉軸受は強制的に潤滑されることになる。   At this time, since the outer diameter of the first split cage is different from that of the second split cage, a difference occurs in the peripheral speed, and the flow of the lubricating oil driven by the contact with the first split cage is the second split. It becomes faster than the flow of the lubricating oil driven by the contact with the cage, and the lubricating oil on the slow flow side is drawn to the fast flow side, and a pumping action is generated inside the bearing. The pumping action causes the lubricating oil to flow in one direction in the bearing, and the deep groove ball bearing is forcibly lubricated.

ここで、連結手段として、第１分割保持器の隣接する切欠部間に形成された柱部の先端部に内向きの係合爪を設け、前記第２分割保持器の隣接する切欠部間に形成された柱部の先端部に外向きの係合爪を設け、第１分割保持器の係合爪を第２分割保持器の外径面に形成された係合凹部に係合し、第２分割保持器の係合爪を第１分割保持器の内径面に形成された係合凹部に係合させるようにした構成から成るものを採用することができる。   Here, as a connecting means, an inward engagement claw is provided at a tip portion of a pillar portion formed between adjacent notch portions of the first split cage, and between the adjacent notch portions of the second split cage. An outward engaging claw is provided at the tip of the formed column part, and the engaging claw of the first divided holder is engaged with an engaging recess formed on the outer diameter surface of the second divided holder. It is possible to employ a configuration in which the engaging claw of the two-divided cage is engaged with an engaging recess formed on the inner diameter surface of the first divided cage.

上記のような連結手段の採用において、係合爪と係合凹部の係合部の数を３つ以上とすることにより、第１分割保持器と第２分割保持器とをより確実に結合することができる。   In adopting the connecting means as described above, the number of the engagement portions of the engagement claw and the engagement recess is three or more, so that the first divided holder and the second divided holder are more reliably coupled. be able to.

この発明に係る合成樹脂製保持器において、切欠部は、平面形状において２分の１円を超える円形状とされて開口端に対向一対のポケット爪を有し、断面形状がボールの外周に沿う球面状とされたものであってもよく、あるいは、第１分割保持器と第２分割保持器の嵌合状態において円筒状のポケットを形成する平面Ｕ字形とされたものであってもよい。   In the synthetic resin cage according to the present invention, the cutout portion has a circular shape exceeding a half circle in a planar shape, and has a pair of opposed pocket claws at the opening end, and the cross-sectional shape is along the outer periphery of the ball. It may be a spherical shape, or may be a plane U-shape that forms a cylindrical pocket in the fitted state of the first divided cage and the second divided cage.

切欠部として、平面形状が２分の１円を超える円形状ものを採用すると、係合爪と係合凹部の係合およびポケット爪とボールの係合によって分割保持器の脱落を効果的に防止することができる。   If a circular shape with a planar shape exceeding one-half circle is used as the notch, the split cage is effectively prevented from falling off by engaging the engaging claw and the engaging recess and engaging the pocket claw and the ball. can do.

一方、切欠部として、平面形状がＵ字形とされたものを採用することにより、保持器の組込みにボールが干渉することがなく、軸受内部に保持器を容易に組込むことができる。   On the other hand, by adopting a U-shaped planar shape as the notch, the ball does not interfere with the assembly of the cage, and the cage can be easily incorporated into the bearing.

平面形状が２分の１円を超える円形状の切欠部の採用において、係合爪と係合凹部間に形成される周方向すきまをボールとポケット間に形成される周方向のポケットすきまより大きくしておくことにより、大きなモーメント荷重が負荷されてボールに遅れ進みが生じ、第１分割保持器と第２分割保持器とが相対的に回転しても、係合爪が係合凹部の周方向で対向する側面に当接することはなく、係合爪の損傷防止に効果を挙げることができる。   In adopting a circular notch with a planar shape exceeding a half circle, the circumferential clearance formed between the engaging claw and the engaging recess is larger than the circumferential pocket clearance formed between the ball and the pocket. By doing so, even if a large moment load is applied and the ball is delayed and advanced, the engaging claw will move around the engaging recess even if the first divided holder and the second divided holder rotate relatively. There is no contact with the side surfaces that face each other in the direction, and the effect of preventing damage to the engaging claws can be obtained.

また、係合爪と係合凹部間に形成される軸方向すきまをボールとポケット間に形成される軸方向のポケットすきまより大きくしておくことにより、第１分割保持器と第２分割保持器に離反する方向の軸方向力が作用した際に、対向一対のポケット爪の内面がボールの外周面に当接して、係合爪が係合凹部の軸方向端面に当接するというようなことはなく、係合爪の損傷防止に効果を挙げることができる。   Further, the first split cage and the second split cage can be obtained by setting the axial clearance formed between the engaging claw and the engaging recess larger than the axial pocket clearance formed between the ball and the pocket. When the axial force in the direction separating from each other is applied, the inner surfaces of the pair of opposing pocket claws abut against the outer peripheral surface of the ball, and the engaging claws abut against the axial end surface of the engaging recess. The effect of preventing damage to the engaging claws can be obtained.

一方、平面Ｕ字形の切欠部の採用において、係合爪と係合凹部間に形成される周方向すきまを径方向で対向する２つの切欠部によって形成されるポケットとそのポケット内に収容されるボール間の周方向のポケットすきまより大きくしておくことにより、大きなモーメント荷重が負荷されてボールに遅れ進みが生じ、第１分割保持器と第２分割保持器とが相対的に回転しても、係合爪が係合凹部の周方向で対向する側面に当接することはなく、係合爪の損傷防止に効果を挙げることができる。   On the other hand, in the adoption of a planar U-shaped notch, a circumferential clearance formed between the engaging claw and the engaging recess is accommodated in a pocket formed by two notches that are opposed in the radial direction and in the pocket. By making it larger than the circumferential pocket clearance between the balls, even if a large moment load is applied and the balls are delayed and advanced, the first split cage and the second split cage can rotate relatively. The engaging claws do not come into contact with the side surfaces opposed to each other in the circumferential direction of the engaging recess, and an effect can be obtained in preventing damage to the engaging claws.

深みぞ玉軸受は、潤滑油により潤滑されるため、第１分割保持器および第２分割保持器は耐油性に優れた合成樹脂で成形するのが好ましい。そのような樹脂として、ポリアミド４６（ＰＡ４６）、ポリアミド６６（ＰＡ６６）、ポリフェニレンスルファイド（ＰＰＳ）を挙げることができる。それらの樹脂のうち、ポリフェニレンスルファイド（ＰＰＳ）は、他の樹脂に比較して耐油性が優れているため、耐油性を考慮するならば、ポリフェニレンスルファイド（ＰＰＳ）を用いるのが最も好ましい。   Since the deep groove ball bearing is lubricated with lubricating oil, the first split cage and the second split cage are preferably formed of a synthetic resin excellent in oil resistance. Examples of such a resin include polyamide 46 (PA46), polyamide 66 (PA66), and polyphenylene sulfide (PPS). Among these resins, polyphenylene sulfide (PPS) has excellent oil resistance compared to other resins, and therefore, considering the oil resistance, it is most preferable to use polyphenylene sulfide (PPS).

また、樹脂材料の価格を考慮するならば、ポリアミド６６（ＰＡ６６）を用いるのが好ましく、潤滑油の種類に応じて適宜に決定すればよい。   In view of the price of the resin material, it is preferable to use polyamide 66 (PA66), which may be determined appropriately according to the type of the lubricating oil.

上記のように、この発明においては、第１分割保持器の軸方向一側部内に、その第１分割保持器より小径の第２分割保持器の軸方向他側部を嵌合して、連結手段の係合により第１分割保持器と第２分割保持器を軸方向に非分離としたので、深みぞ玉軸受への組込みにおいて、外輪と内輪が相対回転した際に、第１分割保持器と第２分割保持器の径差に基づく周速の相違から、軸受内部にポンプ作用を生じさせることができる。このため、そのポンプ作用によって軸受内部に潤滑油を強制的に流動させることができ、潤滑性に優れた深みぞ玉軸受を得ることができる。   As described above, in the present invention, the axially other side portion of the second split cage having a smaller diameter than that of the first split cage is fitted into the axially one side portion of the first split cage. Since the first split cage and the second split cage are not separated in the axial direction by the engagement of the means, when the outer ring and the inner ring rotate relative to each other in the incorporation into the deep groove ball bearing, the first split cage Because of the difference in peripheral speed based on the difference in diameter between the second split cage and the second split cage, a pumping action can be generated inside the bearing. For this reason, lubricating oil can be forced to flow inside the bearing by the pump action, and a deep groove ball bearing excellent in lubricity can be obtained.

この発明に係る合成樹脂製保持器を採用した深みぞ玉軸受の縦断正面図Longitudinal front view of a deep groove ball bearing employing a synthetic resin cage according to the present invention 図１に示す保持器の一部分を示す右側面図The right view which shows a part of cage | basket shown in FIG. 図１に示す保持器の一部分を示す左側面図The left view which shows a part of cage shown in FIG. 図１の第１分割保持器と第２分割保持器の結合部を拡大して示す断面図Sectional drawing which expands and shows the coupling | bond part of the 1st division | segmentation holder | retainer of FIG. 1, and a 2nd division | segmentation holder | retainer 第１分割保持器と第２分割保持器の一部分を示す平面図The top view which shows a part of a 1st division | segmentation holder | retainer and a 2nd division | segmentation holder | retainer （Ｉ）は、図５に示す第１分割保持器のポケットにボールを組込んだ状態での周方向のポケットすきまを示す平面図、（II）は、図５に示す第１分割保持器のポケットにボールを組込んだ状態での軸方向のポケットすきまを示す平面図(I) is a plan view showing a pocket clearance in the circumferential direction in a state where a ball is incorporated in the pocket of the first split cage shown in FIG. 5, and (II) is a plan view of the first split cage shown in FIG. Top view showing the pocket clearance in the axial direction with the ball in the pocket この発明に係る合成樹脂製保持器の他の例を示す一部分の平面図Partial plan view showing another example of the synthetic resin cage according to the present invention 図７に示す第１分割保持器のポケットにボールを組込んだ状態での周方向のポケットすきまを示す平面図The top view which shows the pocket clearance of the circumferential direction in the state which built the ball | bowl in the pocket of the 1st division | segmentation holder | retainer shown in FIG.

以下、この発明の実施の形態を図面に基づいて説明する。図１に示すように、深みぞ玉軸受Ａは、外輪１１の内径面に形成された軌道溝１２と内輪２１の外径面に設けられた軌道溝２２間にボール３１を組込み、そのボール３１をこの発明に係る保持器４０で保持している。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, in the deep groove ball bearing A, a ball 31 is incorporated between a raceway groove 12 formed on the inner diameter surface of the outer ring 11 and a raceway groove 22 provided on the outer diameter surface of the inner ring 21. Is held by the cage 40 according to the present invention.

ここで、外輪１１の軌道溝１２の両側に形成された一対の肩１３ａ、１３ｂのうち、軌道溝１２の一側方に位置する肩１３ａの高さを標準型深みぞ玉軸受の外輪の肩の高さより高くし、他側方に位置する肩１３ｂを標準型深みぞ玉軸受の外輪の肩の高さと同じ高さとしており、また、内輪２１の軌道溝２２の両側に形成された一対の肩２３ａ、２３ｂのうち、軌道溝２２の他側方に位置する肩２３ｂの高さを標準型深みぞ玉軸受の内輪の肩の高さより高くし、一側方に位置する肩２３ａの高さを標準型深みぞ玉軸受の内輪の肩の高さと同じ高さとしているが、外輪１１および内輪２１は、標準型深みぞ玉軸受の外輪および内輪と同一の構成からなるものを用いるようにしてもよく、また、外輪１１の他側方に位置する肩１３ｂおよび内輪２１の一側方に位置する肩２３ａの肩高さを標準型深みぞ玉軸受の肩の高さより低くしてもよい。なお、標準型深みぞ玉軸受とは、外輪の一対の肩の高さおよび内輪の一対の肩の高さが同じ高さとされている軸受のことをいう。   Here, of the pair of shoulders 13a and 13b formed on both sides of the raceway groove 12 of the outer ring 11, the height of the shoulder 13a located on one side of the raceway groove 12 is set to the shoulder of the outer ring of the standard deep groove ball bearing. The pair of shoulders 13b located on the other side are the same height as the shoulders of the outer rings of the standard type deep groove ball bearings. Of the shoulders 23a and 23b, the height of the shoulder 23b located on the other side of the raceway groove 22 is made higher than the height of the shoulder of the inner ring of the standard deep groove ball bearing, and the height of the shoulder 23a located on one side Is the same as the shoulder height of the inner ring of the standard type deep groove ball bearing, but the outer ring 11 and the inner ring 21 have the same configuration as the outer ring and inner ring of the standard type deep groove ball bearing. The shoulder 13b and the inner ring 21 located on the other side of the outer ring 11 A shoulder 23a shoulder height positioned on one side may be standard deep groove below shoulder height of the ball bearing. The standard deep groove ball bearing is a bearing in which the height of the pair of shoulders of the outer ring and the height of the pair of shoulders of the inner ring are the same.

図１乃至図３に示すように、保持器４０は、第１分割保持器４１と、その第１分割保持器４１の内側に挿入された第２分割保持器４２とからなる。   As shown in FIGS. 1 to 3, the holder 40 includes a first divided holder 41 and a second divided holder 42 inserted inside the first divided holder 41.

図５に示すように、第１分割保持器４１は、環状体４３の軸方向一側面に対向一対のポケット爪４４を周方向に等間隔に形成し、各対向一対のポケット爪４４間に上記環状体４３を刳り抜く平面形状が２分の１円を超える大きさの切欠部４５を設けた合成樹脂の成形品からなっている。   As shown in FIG. 5, the first split holder 41 has a pair of opposed pocket claws 44 formed on the one side surface in the axial direction of the annular body 43 at equal intervals in the circumferential direction. The planar shape of the annular body 43 is made of a synthetic resin molded product provided with a notch 45 having a size exceeding a half circle.

ここで、環状体４３の内径は、図１に示すように、ボール３１のピッチ円径（ＰＣＤ）に略等しく、外径は外輪１１の高さが高い肩１３ａの内径と高さの低い肩１３ｂの内径の範囲内とされて、外輪１１の高さの低い肩１３ｂ側から軸受内に挿入可能とされている。また、切欠部４５の内面は、ボール３１の外周に沿う球面状とされている。   Here, as shown in FIG. 1, the inner diameter of the annular body 43 is substantially equal to the pitch circle diameter (PCD) of the balls 31, and the outer diameter is equal to the inner diameter of the shoulder 13a where the height of the outer ring 11 is high and the shoulder whose height is low. The inner diameter of the outer ring 11 can be inserted into the bearing from the lower shoulder 13b side. Further, the inner surface of the notch 45 is a spherical shape along the outer periphery of the ball 31.

一方、第１分割保持器４２は、環状体４８の軸方向他側面に対向一対のポケット爪４９を周方向に等間隔に形成し、各対向一対のポケット爪４９間に上記環状体４８を刳り抜く平面形状が２分の１円を超える大きさの切欠部５０を設けた合成樹脂の成形品からなっている。   On the other hand, the first split cage 42 is formed with a pair of opposed pocket claws 49 on the other side surface in the axial direction of the annular body 48 at equal intervals in the circumferential direction, and the annular body 48 is wound between each pair of opposed pocket claws 49. It consists of a molded product of synthetic resin provided with a cutout portion 50 having a size that exceeds a half of a half of the planar shape to be extracted.

上記環状体４８の外径は、図１に示すように、ボール３１のピッチ円径（ＰＣＤ）に略等しく、内径は内輪２１の高さの高い肩２３ｂの外径と高さの低い肩２３ａの外径の範囲内とされている。この第２分割保持器４２は、高さの低い肩２３ａ側から軸受内に挿入可能とされ、かつ、第１分割保持器４１の内側に嵌合可能とされている。また、切欠部５０の内面は、ボール３１の外周に沿う球面状とされている。   As shown in FIG. 1, the outer diameter of the annular body 48 is substantially equal to the pitch circle diameter (PCD) of the balls 31, and the inner diameter is the outer diameter of the high shoulder 23b of the inner ring 21 and the low shoulder 23a. The outer diameter is within the range. The second split cage 42 can be inserted into the bearing from the low shoulder 23a side, and can be fitted inside the first split cage 41. Further, the inner surface of the notch 50 is formed in a spherical shape along the outer periphery of the ball 31.

図４および図５に示すように、第１分割保持器４１と第２分割保持器４２の相互間には、第１分割保持器４１の軸方向一側部内に第２分割保持器４２の軸方向他側部を挿入して、対向一対の切欠部４５，５０により円形のポケットを形成する状態において、その第１分割保持器４１と第２分割保持器４２を軸方向に非分離とする連結手段Ｘが設けられている。   As shown in FIG. 4 and FIG. 5, the shaft of the second split holder 42 is located between the first split holder 41 and the second split holder 42 within one side in the axial direction of the first split holder 41. In a state where a circular pocket is formed by a pair of opposed notches 45 and 50 by inserting the other side portion in the direction, the first split holder 41 and the second split holder 42 are non-separated in the axial direction. Means X are provided.

連結手段Ｘは、第１分割保持器４１の隣接する切欠部４５間に形成された柱部４３ａの先端部に内向きの係合爪４６を設け、かつ、環状体４３の内径面に上記係合爪４６と同一軸線上に溝状の係合凹部４７を形成し、第２分割保持器４２の隣接する切欠部５０間に形成された柱部４８ａの先端部に外向きの係合爪５１を設け、かつ、環状体４８の外径面に上記係合爪５１と同一軸線上に係合凹部５２を形成し、第１分割保持器４１の係合爪４６と第２分割保持器４２の係合凹部５２の係合、および、第２分割保持器４２の係合爪５１と第１分割保持器４１の係合凹部４７の係合によって、第１分割保持器４１と第２分割保持器４２とを軸方向に非分離とする構成とされている。   The connecting means X is provided with an inward engagement claw 46 at the tip of a pillar portion 43a formed between adjacent cutout portions 45 of the first split holder 41, and the engagement member X is provided on the inner diameter surface of the annular body 43. A groove-like engagement recess 47 is formed on the same axis as the joint claw 46, and an outward engagement claw 51 is formed at the tip of a column part 48 a formed between the adjacent notches 50 of the second split holder 42. And an engagement recess 52 is formed on the outer diameter surface of the annular body 48 on the same axis as the engagement claw 51, and the engagement claw 46 of the first divided holder 41 and the second divided holder 42 are By the engagement of the engagement recess 52 and the engagement of the engagement claw 51 of the second split retainer 42 and the engagement recess 47 of the first split retainer 41, the first split retainer 41 and the second split retainer. 42 is not separated in the axial direction.

ここで、第１分割保持器４１および第２分割保持器４２は、深みぞ玉軸受を潤滑する潤滑油に触れるため、耐油性に優れた合成樹脂を用いるようにする。そのような合成樹脂として、ポリアミド４６（ＰＡ４６）、ポリアミド６６（ＰＡ６６）、ポリフェニレンスルファイド（ＰＰＳ）を挙げることができる。これらの樹脂は、潤滑油の種類に応じて適切なものを選択して使用すればよい。   Here, since the 1st division | segmentation holder | retainer 41 and the 2nd division | segmentation holder | retainer 42 touch the lubricating oil which lubricates a deep groove ball bearing, it is made to use the synthetic resin excellent in oil resistance. Examples of such a synthetic resin include polyamide 46 (PA46), polyamide 66 (PA66), and polyphenylene sulfide (PPS). These resins may be selected and used according to the type of lubricating oil.

実施の形態で示す深みぞ玉軸受は上記の構造からなり、その深みぞ玉軸受の組立てに際しては、外輪１１の内側に内輪２１を挿入し、その内輪２１の軌道溝２２と外輪１１の軌道溝１２間に所要数のボール３１を組込む。   The deep groove ball bearing shown in the embodiment has the above-described structure. When the deep groove ball bearing is assembled, the inner ring 21 is inserted inside the outer ring 11, and the race groove 22 of the inner ring 21 and the race groove of the outer ring 11 are inserted. A required number of balls 31 are assembled between 12.

このとき、内輪２１を外輪１１に対して径方向にオフセットして、内輪２１の外径面の一部を外輪１１の内径面の一部に当接し、その当接部位から周方向に１８０度ずれた位置に三日月形の空間を形成し、その空間の一側方から内部にボール３１を組込むようにする。   At this time, the inner ring 21 is offset in the radial direction with respect to the outer ring 11, a part of the outer diameter surface of the inner ring 21 is brought into contact with a part of the inner diameter surface of the outer ring 11, and 180 degrees in the circumferential direction from the contact part. A crescent-shaped space is formed at a shifted position, and the ball 31 is assembled from one side of the space.

そのボール３１の組込みに際して、外輪１１のスラスト負荷側の肩１３ａや内輪２１の高さが高い肩２３ｂの肩高さＨ１が必要以上に高い場合には、ボール３１の組込みを阻害することになるが、実施の形態では、ボール３１の球径ｄに対する肩高さＨ１の比率Ｈ１／ｄが、０．５０を超えることのない高さとして、外輪１１と内輪２１間にボール３１を確実に組込むことができるようにしてある。 Upon incorporation of the balls 31, when the shoulder height H 1 of the thrust load side shoulder 13a and the height of the inner ring 21 of the outer ring 11 is high shoulder 23b is higher than necessary, to inhibit the incorporation of the balls 31 However, in the embodiment, the ball 31 is placed between the outer ring 11 and the inner ring 21 so that the ratio H 1 / d of the shoulder height H 1 to the ball diameter d of the ball 31 does not exceed 0.50. It is designed to be incorporated reliably.

ボール３１の組込み後、内輪２１の中心を外輪１１の中心に一致させてボール３１を周方向に等間隔に配置し、外輪１１の高さの低い肩１３ｂの一側方から外輪１１と内輪２１間に第１分割保持器４１を、その第１分割保持器４１に形成された切欠部４５内にボール３１が嵌り込むようにして挿入する。   After the ball 31 is assembled, the center of the inner ring 21 is made to coincide with the center of the outer ring 11, the balls 31 are arranged at equal intervals in the circumferential direction, and the outer ring 11 and the inner ring 21 from one side of the shoulder 13b where the height of the outer ring 11 is low. The first split holder 41 is inserted between the notches 45 formed in the first split holder 41 so that the balls 31 are fitted therebetween.

また、内輪２１の高さが低い肩２３ａの一側方から外輪１１と内輪２１間に第２分割保持器４２を、その第２分割保持器４２に形成された切欠部５０内にボール３１が嵌り込むように挿入して、第１分割保持器４１の軸方向一側部内に第２分割保持器４２の軸方向他側部を嵌合する。   Further, the second split retainer 42 is inserted between the outer ring 11 and the inner ring 21 from one side of the shoulder 23a where the height of the inner ring 21 is low, and the ball 31 is inserted into the notch 50 formed in the second split retainer 42. It inserts so that it may fit, and the axial direction other side part of the 2nd division | segmentation holder | retainer 42 is fitted in the axial direction one side part of the 1st division | segmentation holder | retainer 41. FIG.

上記のように、第１分割保持器４１内に第２分割保持器４２を嵌合することにより、図１および図４に示すように、各分割保持器４１、４２に形成された係合爪４６、５１が相手方の分割保持器に設けられた係合凹部４７、５２に係合することになり、深みぞ玉軸受の組立てが完了する。   As described above, the engagement claws formed in the respective divided holders 41 and 42 by fitting the second divided holder 42 into the first divided holder 41 as shown in FIGS. 46 and 51 are engaged with engaging recesses 47 and 52 provided in the other split cage, and the assembly of the deep groove ball bearing is completed.

このように、外輪１１の軌道溝１２と内輪２１の軌道溝２２間にボール３１を組込んだ後、外輪１１と内輪１２間の両側方から内部に第１分割保持器４１と第２分割保持器４２とを挿入して、第１分割保持器４１内に第２分割保持器４２を嵌合する簡単な作業によって深みぞ玉軸受Ａを組立てることができる。   As described above, after the ball 31 is assembled between the raceway groove 12 of the outer ring 11 and the raceway groove 22 of the inner ring 21, the first split holder 41 and the second split hold are internally provided from both sides between the outer ring 11 and the inner ring 12. The deep groove ball bearing A can be assembled by a simple operation of inserting the second holder 42 and fitting the second divided holder 42 into the first divided holder 41.

ここで、上記深みぞ玉軸受Ａを用いて、例えば、トランスミッションのインプットシャフト等のトルク伝達シャフトを支持し、その支持状態において、トルク伝達シャフトが回転し、外輪１１と内輪２１が相対回転すると、ボール３１は自転しつつ公転し、その公転により、保持器４０も回転し、外輪１１と内輪２１間に潤滑油が介在されていると、その潤滑油は保持器４０との接触によって連れ回されることになる。   Here, using the deep groove ball bearing A, for example, a torque transmission shaft such as an input shaft of a transmission is supported, and in the support state, the torque transmission shaft rotates and the outer ring 11 and the inner ring 21 rotate relative to each other. The ball 31 revolves while rotating, and the cage 40 also rotates due to the revolution. When the lubricating oil is interposed between the outer ring 11 and the inner ring 21, the lubricating oil is rotated by contact with the cage 40. Will be.

このとき、第１分割保持器４１と第２分割保持器４２は外径が異なるため、周速に差が生じ、第１分割保持器４１との接触によって連れ回される潤滑油の流れは第２分割保持器４２との接触によって連れ回される潤滑油の流れより速くなり、流れの速い側に流れの遅い側の潤滑油が引寄せられて、軸受内部にポンプ作用が生じる。そのポンプ作用により、図１の矢印で示す方向に潤滑油が流動し、軸受内部が強制的に潤滑されることになり、深みぞ玉軸受Ａの潤滑性の向上を図ることができる。   At this time, since the first split cage 41 and the second split cage 42 have different outer diameters, there is a difference in peripheral speed, and the flow of lubricating oil that is rotated by contact with the first split cage 41 is the first. It becomes faster than the flow of the lubricating oil driven by the contact with the two-divided cage 42, the lubricating oil on the slow flow side is attracted to the fast flow side, and a pump action is generated inside the bearing. Due to the pump action, the lubricating oil flows in the direction indicated by the arrow in FIG. 1 and the inside of the bearing is forcibly lubricated, so that the lubricity of the deep groove ball bearing A can be improved.

実施の形態で示す深みぞ玉軸受においては、第１分割保持器４１の切欠部４５および第２分割保持器４２の切欠部５０の開口端にボール３１を抱き込む対向一対のポケット爪４４、４９を設け、上記第１分割保持器４１に形成された対向一対のポケット爪４４と第２分割保持器４２に設けられた対向一対のポケット爪４９を相反する方向に向く組み合わせとし、その組み合わせ状態において、係合爪４６、５１を係合凹部４７、５２に係合して、第１分割保持器４１と第２分割保持器４２を軸方向に非分離としているため、大きなモーメント荷重が負荷されてボール３１に遅れや進みが生じても、保持器４０は脱落するようなことはない。   In the deep groove ball bearing shown in the embodiment, a pair of opposed pocket claws 44 and 49 that embed the ball 31 in the open ends of the cutout portion 45 of the first divided holder 41 and the cutout portion 50 of the second divided holder 42. And a pair of opposed pocket claws 44 formed in the first divided holder 41 and a pair of opposed pocket claws 49 provided in the second divided holder 42 are oriented in opposite directions, and in the combined state Since the engagement claws 46 and 51 are engaged with the engagement recesses 47 and 52 and the first divided holder 41 and the second divided holder 42 are not separated in the axial direction, a large moment load is applied. Even if the ball 31 is delayed or advanced, the retainer 40 does not fall off.

ここで、図６（Ｉ）に示すように、係合爪４６、５１と係合凹部４７、５２間に形成される周方向すきま６０のすきま量δ１をボール３１と切欠部４５、５０間に形成される周方向のポケットすきま６１のすきま量δ２より大きくしておくことにより、大きなモーメント荷重が負荷されてボール３１に遅れ進みが生じ、第１分割保持器４１と第２分割保持器４２とが相対的に回転しても、係合爪４６、５１が係合凹部４７、５２の周方向で対向する側面に当接することはなく、係合爪４６、５１の損傷防止に効果を挙げることができる。 Here, as shown in FIG. 6 (I), the clearance δ 1 of the circumferential clearance 60 formed between the engaging claws 46, 51 and the engaging recesses 47, 52 is set between the ball 31 and the notches 45, 50. By making the clearance larger than the clearance amount δ 2 of the circumferential pocket clearance 61 formed on the ball 31, a large moment load is applied and the ball 31 is delayed and advanced, and the first split retainer 41 and the second split retainer 42, the engaging claws 46 and 51 do not come into contact with the opposite side surfaces of the engaging recesses 47 and 52 in the circumferential direction, which is effective in preventing damage to the engaging claws 46 and 51. Can be mentioned.

また、図６（II）に示すように、係合爪４６、５１と係合凹部４７、５２間に形成される軸方向すきま６２のすきま量δ３をボール３１と切欠部４５、５０間に形成される軸方向のポケットすきま６３のすきま量δ４より大きくしておくことにより、第１分割保持器４１と第２分割保持器４２に離反する方向の軸方向力が作用した際に、対向一対のポケット爪４４、４９の内面がボール３１の外周面に当接して、係合爪４６、５１が係合凹部４７、５２の軸方向端面に当接するというようなことがなくなり、係合爪４６、５１の損傷防止に効果を挙げることができる。 Further, as shown in FIG. 6 (II), the clearance δ 3 of the axial clearance 62 formed between the engaging claws 46, 51 and the engaging recesses 47, 52 is set between the ball 31 and the notches 45, 50. When the axial force in the direction away from the first divided cage 41 and the second divided cage 42 is applied to the first divided cage 41 and the second divided cage 42 by making the gap amount δ 4 of the formed axial pocket gap 63 larger than the gap amount δ 4. The inner surfaces of the pair of pocket claws 44 and 49 abut against the outer peripheral surface of the ball 31, and the engagement claws 46 and 51 do not abut against the axial end surfaces of the engagement recesses 47 and 52. The effect of preventing the damage of 46 and 51 can be obtained.

図１および図５では、切欠部４５、５０として、環状体４３、４８を刳り抜く平面形状が２分の１円を超える大きさであって、断面形状が円弧状とされたものを示したが、切欠部４５、５０はこれに限定されるものではない。例えば、図７に示すように、第１分割保持器４１と第２分割保持器４２の嵌合状態において円筒状のポケットを形成する平面Ｕ字形とされたものであってもよい。   In FIGS. 1 and 5, as the notches 45 and 50, the planar shape of the annular bodies 43 and 48 is larger than a half circle, and the cross-sectional shape is an arc shape. However, the notches 45 and 50 are not limited to this. For example, as shown in FIG. 7, a flat U-shape that forms a cylindrical pocket in the fitted state of the first divided holder 41 and the second divided holder 42 may be used.

図７に示す切欠部４５、５０の採用において、図７および図８に示すように、係合爪４６、５１と係合凹部４７、５２間に形成される周方向すきま６４のすきま量δ５をボール３１と切欠部４５、５０間に形成される周方向のポケットすきま６６のすきま量δ６より大きくしておくことにより、大きなモーメント荷重が負荷されてボール３１に遅れ進みが生じ、第１分割保持器４１と第２分割保持器４２とが相対的に回転しても、係合爪４６、５１が係合凹部４７、５２の周方向で対向する側面に当接することはなく、係合爪４６、５１の損傷防止に効果を挙げることができる。 When the notches 45 and 50 shown in FIG. 7 are employed, the clearance δ 5 of the circumferential clearance 64 formed between the engaging claws 46 and 51 and the engaging recesses 47 and 52 as shown in FIGS. Is larger than the clearance amount δ 6 of the circumferential pocket clearance 66 formed between the ball 31 and the notches 45 and 50, a large moment load is applied and the ball 31 is delayed and advanced. Even if the split holder 41 and the second split holder 42 are relatively rotated, the engaging claws 46 and 51 do not come into contact with the side surfaces of the engaging recesses 47 and 52 that are opposed to each other in the circumferential direction. An effect can be obtained in preventing damage to the claws 46 and 51.

３１ ボール
４０ 保持器
４１ 第１分割保持器
４２ 第２分割保持器
４３ａ 柱部
４４ ポケット爪
４５ 切欠部
４６ 係合爪
４７ 係合凹部
４８ａ 柱部
４９ ポケット爪
５０ 切欠部
５１ 係合爪
５２ 係合凹部
６０ 周方向すきま
６１ 周方向のポケットすきま
６２ 軸方向すきま
６３ 軸方向のポケットすきま
６４ 周方向すきま
６５ 周方向のポケットすきま
Ｘ 連結手段 31 Ball 40 Cage 41 First divided cage 42 Second divided cage 43a Column 44 Pocket claw 45 Notch 46 Engagement claw 47 Engagement recess 48a Pillar 49 Pocket claw 50 Notch 51 Engagement claw 52 Engage Recess 60 Circumferential clearance 61 Circumferential pocket clearance 62 Axial clearance 63 Axial pocket clearance 64 Circumferential clearance 65 Circumferential pocket clearance X Connection means

Claims (8)

合成樹脂の成形品からなる円筒形の第１分割保持器と、その第１分割保持器の内側に挿入される合成樹脂製の円筒形の第２分割保持器からなり、前記第１分割保持器の軸方向一側面と第２分割保持器の軸方向他側面に、第１分割保持器の軸方向一側部内に第２分割保持器の軸方向他側部を嵌合する組み合わせ状態でボール保持用の円形のポケットを形成する切欠部を周方向に間隔をおいて設け、前記第１分割保持器と第２分割保持器が円形のポケットを形成すると共に、第１分割保持器の軸方向他側部が第２分割保持器の軸方向他側面から軸方向に突出し、かつ、第２分割保持器の軸方向一側部が第１分割保持器の軸方向一側面から軸方向に突出する組み合わせ状態で、その両分割保持器を軸方向に非分離とする連結手段を設け、
前記連結手段が、前記第１分割保持器の隣接する切欠部間に形成された柱部の先端部に内向きの係合爪を設け、前記第２分割保持器の隣接する切欠部間に形成された柱部の先端部に外向きの係合爪を設け、第１分割保持器の係合爪を第２分割保持器の外径面に形成された係合凹部に係合し、第２分割保持器の係合爪を第１分割保持器の内径面に形成された係合凹部に係合した構成とされ、前記係合爪と係合凹部の係合部の数を３つ以上とした深みぞ玉軸受用の合成樹脂製保持器。 A first split cage having a cylindrical shape made of a synthetic resin molded product and a cylindrical second split cage made of synthetic resin inserted inside the first split cage, the first split cage The ball is held in a combined state in which the other axial side of the second split cage is fitted into the first axial side of the first split cage on the one axial side surface of the second split cage and the other axial side surface of the second split cage. Notch portions for forming circular pockets for use in the circumferential direction are provided at intervals in the circumferential direction, and the first divided holder and the second divided holder form circular pockets, and the axial direction of the first divided holder, etc. A combination in which the side portion protrudes in the axial direction from the other axial side surface of the second split cage, and the one axial side portion of the second split cage projects in the axial direction from one axial side surface of the first split cage In the state, provided with a connecting means for non-separating both the split cage in the axial direction
The connecting means is provided between the adjacent notches of the second split cage by providing an inward engagement claw at the tip of the pillar portion formed between the adjacent notches of the first split cage. An outward engaging claw is provided at the tip of the pillar portion, and the engaging claw of the first divided holder is engaged with an engaging recess formed in the outer diameter surface of the second divided holder, The engaging claw of the split cage is configured to engage with an engaging recess formed on the inner diameter surface of the first split cage, and the number of engaging portions of the engaging claw and the engaging recess is three or more. Synthetic resin cage for deep groove ball bearings. 前記切欠部が、平面形状において２分の１円を超える円形状とされて開口端に対向一対のポケット爪を有し、断面形状がボールの外周に沿う球面状とされた請求項１に記載の深みぞ玉軸受用の合成樹脂製保持器。 It said notch has a circular shape and has been opposed pair of pocket claws into the open end more than 1 yen 2 minutes in a planar shape, according to claim 1 in which the cross-sectional shape is a spherical shape along the outer periphery of the ball Synthetic resin cage for deep groove ball bearings. 前記係合爪と係合凹部間に形成される周方向すきまを径方向で対向する２つの切欠部によって形成されるポケットとそのポケット内に収容されるボール間の周方向のポケットすきまより大きくした請求項２に記載の深みぞ玉軸受用の合成樹脂製保持器。 The circumferential clearance formed between the engaging claw and the engaging recess is made larger than the circumferential pocket clearance between the pocket formed by the two notch portions facing each other in the radial direction and the ball accommodated in the pocket. A synthetic resin cage for a deep groove ball bearing according to claim 2 . 前記係合爪と係合凹部間に形成される軸方向すきまを径方向で対向する２つの切欠部によって形成されるポケットとそのポケット内に収容されるボール間の軸方向のポケットすきまより大きくした請求項２又は３に記載の深みぞ玉軸受用の合成樹脂製保持器。 The axial clearance formed between the engaging claw and the engaging recess is made larger than the axial pocket clearance between the pocket formed by the two notch portions opposed in the radial direction and the ball accommodated in the pocket. A synthetic resin cage for deep groove ball bearings according to claim 2 or 3 . 前記切欠部が、第１分割保持器と第２分割保持器の組み合わせ状態において円筒状のポケットを形成する平面Ｕ字形とされた請求項１に記載の深みぞ玉軸受用の合成樹脂製保持器。 The synthetic resin cage for a deep groove ball bearing according to claim 1, wherein the notch is formed into a flat U-shape that forms a cylindrical pocket in a combined state of the first divided cage and the second divided cage. . 前記係合爪と係合凹部間に形成される周方向すきまを径方向で対向する２つの切欠部によって形成されるポケットとそのポケット内に収容されるボール間の周方向のポケットすきまより大きくした請求項５に記載の深みぞ玉軸受用の合成樹脂製保持器。 The circumferential clearance formed between the engaging claw and the engaging recess is made larger than the circumferential pocket clearance between the pocket formed by the two notch portions facing each other in the radial direction and the ball accommodated in the pocket. A synthetic resin cage for a deep groove ball bearing according to claim 5 . 前記第１分割保持器および第２分割保持器が、ポリアミド４６、ポリアミド６６およびポリフェニレンスルファイドの一種からなる請求項１乃至６のいずれかの項に記載の深みぞ玉軸受用の合成樹脂製保持器。 The synthetic resin holder for a deep groove ball bearing according to any one of claims 1 to 6 , wherein the first split cage and the second split cage are made of one of polyamide 46, polyamide 66, and polyphenylene sulfide. vessel. 内径面に軌道溝が形成された外輪と、外径面に軌道溝が形成された内輪と、外輪の軌道溝と内輪の軌道溝間に組込まれたボールと、そのボールを保持する保持器とからなる深みぞ玉軸受において、
前記保持器が、請求項１乃至７のいずれかの項に記載の保持器からなることを特徴とする深みぞ玉軸受。 An outer ring having a raceway groove formed on the inner diameter surface, an inner ring having a raceway groove formed on the outer diameter surface, a ball assembled between the raceway groove of the outer ring and the raceway groove of the inner ring, and a cage for holding the ball In deep groove ball bearings consisting of
A deep groove ball bearing, wherein the retainer comprises the retainer according to any one of claims 1 to 7 .
JP2009166411A 2009-06-26 2009-07-15 Synthetic resin cage and deep groove ball bearing for deep groove ball bearings Active JP5376310B2 (en)

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JP2009166411A JP5376310B2 (en) 2009-07-15 2009-07-15 Synthetic resin cage and deep groove ball bearing for deep groove ball bearings
EP10792025.8A EP2447557B1 (en) 2009-06-26 2010-06-18 Retainer made of synthetic resin for use in a deep groove ball bearing; deep groove ball bearing; and gear support device
US13/321,854 US8939044B2 (en) 2009-06-26 2010-06-18 Retainer made of synthetic resin for use in a deep groove ball bearing; deep groove ball bearing; and gear support device
PCT/JP2010/060364 WO2010150707A1 (en) 2009-06-26 2010-06-18 Synthetic resin holder for deep groove ball bearings, deep groove ball bearing, and gear supporting device
CN201080027562.5A CN102803767B (en) 2009-06-26 2010-06-18 The synthetic resin retainer of deep groove ball bearing and deep groove ball bearing and gear support device

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