JP2007078115A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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JP2007078115A
JP2007078115A JP2005268595A JP2005268595A JP2007078115A JP 2007078115 A JP2007078115 A JP 2007078115A JP 2005268595 A JP2005268595 A JP 2005268595A JP 2005268595 A JP2005268595 A JP 2005268595A JP 2007078115 A JP2007078115 A JP 2007078115A
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Prior art keywords
grease
bearing
inner ring
outer ring
seal
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Hideji Ito
秀司 伊藤
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2005268595A priority Critical patent/JP2007078115A/en
Priority to DE112006002478T priority patent/DE112006002478T5/en
Priority to US11/992,071 priority patent/US20090116776A1/en
Priority to CN2006800333713A priority patent/CN101263312B/en
Priority to PCT/JP2006/317101 priority patent/WO2007043249A1/en
Publication of JP2007078115A publication Critical patent/JP2007078115A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing capable of simplifying a structure of a seal with a grease pocket and grease filling work in a sealed bearing having superior insulation performance. <P>SOLUTION: The cylindrical roller bearing 31 includes an inner ring 32, an outer ring 33 which has the same width with the inner ring 32 in an axial direction and forms insulation layers on an outer diameter surface and both end faces, cylindrical rollers 34 arranged between the inner ring 32 and outer ring 33, a retainer 35 for retaining the cylindrical rollers at regular intervals, and a seal 36 as a sealing member, which seals both ends of the bearing. The seal 36 has a projecting shape with a sectioned C-shape from both ends of the inner ring 32 and outer ring 33, and is formed by injection molding of a resin material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、転がり軸受、特に、軌道輪に絶縁層を有する鉄道車両主電動機用軸受に関するものである。   The present invention relates to a rolling bearing, and more particularly to a railway vehicle main motor bearing having an insulating layer on a raceway.

従来、鉄道車両主電動機に用いられる軸受は、円筒ころ軸受や深溝玉軸受が用いられている。例えば、図８に示すような円筒ころ軸受１は、内輪２と、外輪３と、内輪２および外輪３の間に配置された転動体としての円筒ころ４と、円筒ころ４の間隔を保持する保持器５と、グリースを封入する密封シール６とを備える。   Conventionally, cylindrical roller bearings and deep groove ball bearings have been used as bearings used in railway vehicle main motors. For example, a cylindrical roller bearing 1 as shown in FIG. 8 maintains an interval between an inner ring 2, an outer ring 3, a cylindrical roller 4 as a rolling element disposed between the inner ring 2 and the outer ring 3, and the cylindrical roller 4. A cage 5 and a hermetic seal 6 enclosing grease are provided.

また、鉄道車両主電動機に使用される円筒ころ軸受１は、電食による軸受の損傷を防止するために、外輪３の外径面および両端面に絶縁被膜が形成されている。絶縁被膜は、セラミックス等を溶射することにより形成する。   Moreover, the cylindrical roller bearing 1 used for a railway vehicle main motor has insulating coatings formed on the outer diameter surface and both end surfaces of the outer ring 3 in order to prevent damage to the bearing due to electrolytic corrosion. The insulating coating is formed by spraying ceramics or the like.

さらに、鉄道車両主電動機は屋外で使用されるため、軸受周辺構造でグリースポケットを形成するオープンタイプの軸受では、塵埃の混入によるグリースの劣化が懸念される。そこで、円筒ころ軸受１は、塵埃の混入によるグリースの劣化を防止し、メンテナンス周期を延伸するために密封式軸受とされる。   Furthermore, since the railway vehicle main motor is used outdoors, there is a concern that grease may deteriorate due to dust contamination in an open type bearing in which a grease pocket is formed in the bearing peripheral structure. Therefore, the cylindrical roller bearing 1 is a sealed bearing in order to prevent deterioration of grease due to mixing of dust and extend a maintenance cycle.

上記構成の円筒ころ軸受１の場合、軸受内部の空間が小さいので、鉄道車両主電動機用軸受に必要な軸受寿命を確保するのに十分な量のグリースを封入することができないという問題がある。   In the case of the cylindrical roller bearing 1 configured as described above, since the space inside the bearing is small, there is a problem that a sufficient amount of grease cannot be sealed to ensure the bearing life required for the bearing for the railway vehicle main motor.

しかし、上記の問題を解決する手段として、内部空間容積に対するグリースの充填比率を引き上げることが考えられるが、この場合、軸受回転時、特に始動時においてグリースの攪拌抵抗が増大し、軸受の急激な温度上昇を招く恐れがあり、適切ではない。   However, as a means for solving the above problem, it is conceivable to increase the filling ratio of the grease with respect to the internal space volume. In this case, the agitation resistance of the grease increases at the time of rotation of the bearing, particularly at start-up, and the bearing suddenly increases. It may cause a temperature rise and is not appropriate.

そこで、密封式軸受において、軸受内部に十分な量のグリースを確保することができる円筒ころ軸受が、例えば、特開２００３−１３９７１号公報（特許文献１）や特開２００４−３４６９７２号公報（特許文献２）に記載されている。   Therefore, in sealed bearings, cylindrical roller bearings capable of securing a sufficient amount of grease inside the bearing are disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-13971 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2004-346972 (Patent). Document 2).

特開２００３−１３９７１号公報（特許文献１）に記載されている円筒ころ軸受１１は、図９に示すように、軸方向幅が長い内輪１２と、外輪１３と、内輪１２および外輪１３の間に配置された円筒ころ１４と、円筒ころ１４の間隔を保持する保持器１５と、グリースを軸受内部に封入する断面形状がＬ字型の密封シール１６とを備える。密封シール１６は、芯金１６ａを絶縁性樹脂１６ｂで覆っている。また、外輪１３の外径面および両端面に絶縁被膜が形成されている。   As shown in FIG. 9, the cylindrical roller bearing 11 described in Japanese Patent Application Laid-Open No. 2003-13971 (Patent Document 1) includes an inner ring 12 having a long axial width, an outer ring 13, an inner ring 12, and an outer ring 13. Are provided with a cylindrical roller 14, a retainer 15 that holds the interval between the cylindrical rollers 14, and a hermetic seal 16 having an L-shaped cross-sectional shape that encloses grease inside the bearing. The hermetic seal 16 covers the cored bar 16a with an insulating resin 16b. In addition, an insulating coating is formed on the outer diameter surface and both end surfaces of the outer ring 13.

また、特開２００４−３４６９７２号公報（特許文献）に記載されている円筒ころ軸受２１は、図１０に示すように、内輪２２と、外輪２３と、内輪２２および外輪２３の間に配置された円筒ころ２４と、円筒ころ２４の間隔を保持する保持器２５と、内輪２２および外輪２３の両端面からコの字型に突出する密封シール２６とを備え、外輪２３の外径面および両端面は絶縁材料２７で覆われている。   Moreover, the cylindrical roller bearing 21 described in JP 2004-346972 A (patent document) is disposed between the inner ring 22, the outer ring 23, the inner ring 22, and the outer ring 23 as shown in FIG. 10. A cylindrical roller 24, a cage 25 that holds the interval between the cylindrical rollers 24, and a sealing seal 26 that protrudes in a U-shape from both end surfaces of the inner ring 22 and the outer ring 23, and the outer diameter surface and both end surfaces of the outer ring 23 Is covered with an insulating material 27.

上記の各公報に記載された円筒ころ軸受１１，２１は、軸受端面から突出した密封シール１６，２６がグリースポケットとして機能するので、軸受内部に封入可能なグリース量が増加する。   In the cylindrical roller bearings 11 and 21 described in the above publications, the seal seals 16 and 26 protruding from the bearing end surfaces function as grease pockets, so that the amount of grease that can be sealed inside the bearings increases.

しかし、上記構成の円筒ころ軸受において、軸受回転時の温度上昇によってグリースの粘度が低下すると、グリースポケット内のグリースが軸受下部に偏るという問題がある。このグリースが軸受内部に大量に流入すると、攪拌抵抗が増大し、急激な温度上昇を招く恐れがある。   However, in the cylindrical roller bearing configured as described above, there is a problem that when the viscosity of the grease decreases due to a temperature rise during rotation of the bearing, the grease in the grease pocket is biased toward the lower portion of the bearing. If a large amount of this grease flows into the bearing, the stirring resistance increases, which may cause a rapid temperature rise.

そこで、図１０に示す円筒ころ軸受２１は、グリースポケット内のグリースを均等に保持するために、密封シール２６の内壁面から突出する堰２８により、グリースポケットを複数の分割領域に区切っている。これにより、グリースが軸受下部に偏るのを防止することができる。
特開２００３−１３９７１号公報 特開２００４−３４６９７２号公報 Therefore, in the cylindrical roller bearing 21 shown in FIG. 10, the grease pocket is divided into a plurality of divided regions by a weir 28 protruding from the inner wall surface of the hermetic seal 26 in order to uniformly hold the grease in the grease pocket. Thereby, it is possible to prevent the grease from being biased toward the lower portion of the bearing.
JP 2003-13971 A JP 2004-346972 A

特開２００３−１３９７１号公報（特許文献１）に記載されている円筒ころ軸受１１は、密封シール１６に金属製の芯金１６ａを使用している。絶縁性樹脂１６ｂで覆われているため、通常の使用状態では問題とはならないが、高い電圧が負荷された場合には、通電して円筒ころ軸受１１が破損する恐れがある。また、特開２００４−３４６９７２号公報（特許文献２）に記載されている円筒ころ軸受２１は、密封シール２６の材料には言及されていない。   The cylindrical roller bearing 11 described in Japanese Patent Application Laid-Open No. 2003-13971 (Patent Document 1) uses a metal core 16 a for the hermetic seal 16. Since it is covered with the insulating resin 16b, there is no problem in a normal use state. However, when a high voltage is applied, the cylindrical roller bearing 11 may be damaged by energization. Further, the cylindrical roller bearing 21 described in Japanese Patent Application Laid-Open No. 2004-346972 (Patent Document 2) is not referred to as the material of the hermetic seal 26.

また、図１０に示す円筒ころ軸受２１に使用されている密封シール２６は、複数の独立した分割領域を有するので、各分割領域毎にグリースの注入口２９を設けてグリースを封入する必要があり、グリース封入に要する作業工数が大幅に増大すると共に、密封シール２６の構造が複雑になるという問題がある。   Further, since the sealing seal 26 used in the cylindrical roller bearing 21 shown in FIG. 10 has a plurality of independent divided regions, it is necessary to provide a grease inlet 29 for each divided region to enclose the grease. There is a problem that the number of work steps required for filling the grease is greatly increased and the structure of the hermetic seal 26 is complicated.

そこで、この発明の目的は、絶縁性能に優れた密封式軸受を提供することである。さらに、グリースポケットを有する密封シールの構造およびグリースの封入作業を簡素化した転がり軸受を提供することを目的とする。   Accordingly, an object of the present invention is to provide a sealed bearing having excellent insulation performance. It is another object of the present invention to provide a rolling bearing in which the structure of a hermetic seal having a grease pocket and the grease filling operation are simplified.

この発明に係る転がり軸受は、内輪と、外輪と、内輪および外輪の間に配置された複数の転動体と、軸受両端部を密封する密封部材とを備える。そして、内輪の内径面および端面、または外輪の外径面および端面には絶縁被膜が設けられ、密封部材は樹脂材料で形成され、内輪および外輪の両端面からコの字型の断面形状で突出する。   A rolling bearing according to the present invention includes an inner ring, an outer ring, a plurality of rolling elements disposed between the inner ring and the outer ring, and a sealing member that seals both ends of the bearing. The inner ring inner surface and end surface or the outer ring outer surface and end surface are provided with an insulating coating, the sealing member is formed of a resin material, and protrudes in a U-shaped cross-sectional shape from both end surfaces of the inner ring and the outer ring. To do.

上記構成の転がり軸受は、コの字型の密封部材がグリースポケットとして機能するので、軸受内部に十分な量のグリースを封入することができる。さらに、絶縁被膜を設けると共に絶縁性の高い樹脂を密封部材の材料として使用することにより、軸受全体としての絶縁性能が向上する。   In the rolling bearing configured as described above, since the U-shaped sealing member functions as a grease pocket, a sufficient amount of grease can be sealed inside the bearing. Furthermore, by providing an insulating coating and using a highly insulating resin as a material for the sealing member, the insulating performance of the entire bearing is improved.

好ましくは、密封部材は、内壁面から突出する堰によって円周方向に区切られた複数の分割領域を有する。これにより、各分割領域に封入したグリースが他の分割領域に流出するのを防止できるので、グリースの粘度が低下した場合でもグリースが軸受下部に偏るのを防止することができる。   Preferably, the sealing member has a plurality of divided regions divided in the circumferential direction by a weir protruding from the inner wall surface. As a result, the grease sealed in each divided region can be prevented from flowing out to the other divided regions, so that even when the viscosity of the grease is reduced, the grease can be prevented from being biased to the lower portion of the bearing.

好ましくは、密封部材は、隣接する分割領域間に連通する連続領域を有する。このように、隣接する分割領域を結ぶ連続領域を設けることにより、１つのグリース注入口から全分割領域にグリースを充填することができる。その結果、密封部材の構造およびグリース封入作業を簡素化することができる。   Preferably, the sealing member has a continuous region that communicates between adjacent divided regions. Thus, by providing the continuous area | region which connects an adjacent division area, grease can be filled to all the division areas from one grease injection port. As a result, the structure of the sealing member and the grease filling operation can be simplified.

さらに好ましくは、連続領域は密封部材の開口端側に位置する。これにより、過剰に充填されたグリースを除去するのが容易となるので、適正な量のグリースを封入することができる。   More preferably, the continuous region is located on the open end side of the sealing member. Accordingly, it becomes easy to remove the excessively filled grease, so that an appropriate amount of grease can be sealed.

この発明は、絶縁被膜を設けると共に絶縁性の高い樹脂を密封部材の材料として使用することにより、軸受の絶縁性能を向上することができる。さらに、コの字型のグリースポケットを有する密封部材に分割領域と連続領域とを設けることにより、密封部材の構造およびグリース充填作業を簡素化した転がり軸受を得ることができる。   According to the present invention, the insulating performance of the bearing can be improved by providing an insulating coating and using a highly insulating resin as a material for the sealing member. Further, by providing the sealing member having a U-shaped grease pocket with the divided region and the continuous region, a rolling bearing that simplifies the structure of the sealing member and the grease filling operation can be obtained.

図１を参照して、この発明の一実施形態に係る円筒ころ軸受３１を説明する。   With reference to FIG. 1, the cylindrical roller bearing 31 which concerns on one Embodiment of this invention is demonstrated.

円筒ころ軸受３１は、内輪３２と、内輪３２と軸方向幅が同一であって、外径面および両端面に絶縁層が形成されている外輪３３と、内輪３２および外輪３３の間に配置された転動体としての円筒ころ３４と、円筒ころ３４の間隔を保持する保持器３５と、軸受両端部を密封する密封部材としての密封シール３６とを備える。   The cylindrical roller bearing 31 is disposed between the inner ring 32, the outer ring 33 having the same axial width as the inner ring 32, and an insulating layer formed on the outer diameter surface and both end surfaces, and the inner ring 32 and the outer ring 33. A cylindrical roller 34 as a rolling element, a retainer 35 that holds the space between the cylindrical rollers 34, and a sealing seal 36 as a sealing member that seals both ends of the bearing.

絶縁層は、セラミックス等の絶縁物質を溶射することにより形成する。また、軸受内部空間には、グリースが充填されている。グリースとしては、例えば、リチウム系グリースやウレア系グリースが使用される。   The insulating layer is formed by spraying an insulating material such as ceramics. The bearing internal space is filled with grease. As the grease, for example, lithium grease or urea grease is used.

密封シール３６は、内輪３２および外輪３３の両端面からコの字型の断面形状で突出する形状で、グリースポケットとしても機能する。また、内壁面から突出する堰３７を有し、図２に示すように、堰３７によって円周方向に区切られた複数の分割領域３６ａと、図３に示すように、密封シール３６の開口端側に、隣接する分割領域３６ａの間に連通する連続領域３６ｂと、密封シール３６の壁面の少なくとも１箇所にグリース注入口（図示せず）とを有する。なお、このような密封シール３６は、樹脂材料を射出成型して形成する。   The hermetic seal 36 has a U-shaped cross-sectional shape protruding from both end faces of the inner ring 32 and the outer ring 33 and also functions as a grease pocket. Further, as shown in FIG. 2, there are a plurality of divided regions 36a that are divided in the circumferential direction by the weir 37 and an open end of the sealing seal 36 as shown in FIG. On the side, a continuous region 36b that communicates between the adjacent divided regions 36a, and a grease inlet (not shown) in at least one place on the wall surface of the hermetic seal 36 are provided. Such a hermetic seal 36 is formed by injection molding of a resin material.

上記構成のように、外輪３３の外径面および両端面に絶縁層を形成すると共に、密封シール３６に絶縁性の高い樹脂材料を使用することにより、円筒ころ軸受３１全体としての絶縁性能を向上することができる。   As described above, an insulating layer is formed on the outer diameter surface and both end surfaces of the outer ring 33, and the insulating performance of the cylindrical roller bearing 31 as a whole is improved by using a highly insulating resin material for the sealing seal 36. can do.

また、グリースポケットを複数の分割領域３６ａに区切ることによって、軸受回転時にグリースの粘度が低下した場合でも、各分割領域３６ａに封入したグリースが他の分割領域３６ａに流出するのを防止できるので、均等にグリースを保持することができる。   Further, by dividing the grease pocket into a plurality of divided regions 36a, it is possible to prevent the grease enclosed in each divided region 36a from flowing out to the other divided regions 36a even when the viscosity of the grease decreases during bearing rotation. Grease can be held evenly.

上記の密封シール３６にグリースを充填する場合、まず密封シール３６の開口端をシール等で密封し、グリース注入口からグリースを注入する。密封シール３６内に注入されたグリースは、まず１つの分割領域３６ａを満たした後、連続領域３６ｂを経由して左右に隣接する分割領域３６ａに移動する。全ての分割領域３６ａがグリースで満たされたら、開口端のシールを外して連続領域３６ｂの余分なグリースを除去する。   When filling the sealing seal 36 with grease, the opening end of the sealing seal 36 is first sealed with a seal or the like, and the grease is injected from the grease injection port. The grease injected into the hermetic seal 36 first fills one divided region 36a and then moves to the left and right divided regions 36a via the continuous region 36b. When all the divided regions 36a are filled with grease, the seal at the open end is removed, and excess grease in the continuous region 36b is removed.

このように、隣接する分割領域３６ａの間に連通する連続領域３６ｂを設けることにより、１箇所のグリース注入口から全ての分割領域３６ａにグリースを充填することができる。これにより、密封シール３６の構造およびグリースの充填作業を簡素化することができる。さらに、連続領域３６ｂを密封シール３６の開口端側に設けることにより、過剰に充填されたグリースを容易に除去することができるので、適正な量のグリースを封入することができる。   Thus, by providing the continuous region 36b that communicates between the adjacent divided regions 36a, it is possible to fill all the divided regions 36a with grease from one grease inlet. Thereby, the structure of the hermetic seal 36 and the grease filling operation can be simplified. Further, by providing the continuous region 36b on the opening end side of the hermetic seal 36, the excessively filled grease can be easily removed, so that an appropriate amount of grease can be enclosed.

なお、図２に示す堰３７は、密封シール３６の円周上に均等に設けた例を示したが、これに限ることなく、グリースの偏りを効果的に防止できる位置に重点的に配置してよく、また、任意の数の堰３７を設けることができる。   2 shows an example in which the weir 37 is provided evenly on the circumference of the hermetic seal 36. However, the weir 37 is not limited to this, and the dam 37 is placed in a position where the grease can be effectively prevented from being biased. Any number of weirs 37 may be provided.

また、図３に示す密封シール３６は、密封性能を高めるために内輪３２側に位置する壁面を外輪３３側に位置する壁面より長くした例を示したが、これに限ることなく、例えば図４に示すように両壁面を同じ長さとしてもよいし、図５に示すように外輪側の壁面を内輪側の壁面より長くしてもよい。なお、図４および図５の参照番号４６，５６は密封シールを、参照番号４６ｂ，５６ｂは連続領域を、参照番号４７，５７は堰をそれぞれ示している。   3 shows an example in which the wall surface located on the inner ring 32 side is longer than the wall surface located on the outer ring 33 side in order to improve the sealing performance, but the present invention is not limited to this example. Both wall surfaces may have the same length as shown in FIG. 5, or the outer ring wall surface may be longer than the inner ring wall surface as shown in FIG. 4 and 5, reference numbers 46 and 56 indicate a hermetic seal, reference numbers 46b and 56b indicate continuous regions, and reference numbers 47 and 57 indicate weirs, respectively.

さらに、図３に示す密封シール３６は、連続領域３６ｂを開口端側に設けた例を示したが、これに限ることなく、例えば図６に示すように径方向外側に設けてもよいし、図７に示すように径方向内側に設けてもよい。さらには、上記の例を組み合わせて、複数箇所に設けることとしてもよい。なお、図６および図７の参照番号６６，７６は密封シールを、参照番号６６ｂ，７６ｂは連続領域を、参照番号６７，７７は堰をそれぞれ示している。   Furthermore, although the sealing seal 36 shown in FIG. 3 has shown the example which provided the continuous area | region 36b in the opening end side, it may not be restricted to this, for example, as shown in FIG. As shown in FIG. 7, it may be provided radially inside. Furthermore, it is good also as providing in several places combining said example. 6 and 7, reference numerals 66 and 76 indicate a hermetic seal, reference numerals 66b and 76b indicate continuous regions, and reference numerals 67 and 77 indicate weirs, respectively.

上記構成の円筒ころ軸受３１には、内輪３２と外輪３３とに標準品を使用することができる。これにより、製品のコストアップを抑制することが可能となる。さらに、密封式軸受とすることにより、周辺部材によるラビリンス構造を簡素化することができるので、モータの小型化および軽量化が可能になる。   Standard products can be used for the inner ring 32 and the outer ring 33 in the cylindrical roller bearing 31 configured as described above. Thereby, it becomes possible to suppress the cost increase of a product. Furthermore, since the labyrinth structure by the peripheral member can be simplified by using the sealed bearing, the motor can be reduced in size and weight.

なお、上記の各実施形態においては、外輪の外径面および両端面に絶縁層を有する円筒ころ軸受の例を示したが、これに限ることなく、内輪の内径面および両端面に絶縁層を形成することとしてもよい。内輪内径面は、外輪外径面と比較して溶射面積が小さいので、絶縁被膜を内輪内径面に溶射することによって、溶射コストを削減することが可能となる。また、絶縁層が密封シールと軌道輪との接合部に干渉しなので、密封シールの固定方法を簡素なものとすることができる。   In each of the above embodiments, an example of a cylindrical roller bearing having an insulating layer on the outer diameter surface and both end surfaces of the outer ring has been shown. However, the present invention is not limited thereto, and an insulating layer is provided on the inner diameter surface and both end surfaces of the inner ring. It is good also as forming. Since the inner ring inner surface has a smaller spray area than the outer ring outer surface, the thermal spraying cost can be reduced by spraying the insulating coating on the inner ring inner surface. Moreover, since the insulating layer interferes with the joint between the hermetic seal and the race, the method for fixing the hermetic seal can be simplified.

さらに、上記の実施形態においては、円筒ころ軸受３１の例を示したが、これに限ることなく、円錐ころ軸受、自動調心ころ軸受、深溝玉軸受、４点接触玉軸受、アンギュラ玉軸受等、転動体がころであるか玉であるかを問わず、あらゆる転がり軸受に適用することができる。   Furthermore, in the above-described embodiment, the example of the cylindrical roller bearing 31 has been shown. However, the present invention is not limited to this, but a tapered roller bearing, a self-aligning roller bearing, a deep groove ball bearing, a four-point contact ball bearing, an angular ball bearing, and the like. Regardless of whether the rolling element is a roller or a ball, it can be applied to any rolling bearing.

以上、図面を参照してこの発明の実施形態を説明したが、この発明は、図示した実施形態のものに限定されない。図示した実施形態に対して、この発明と同一の範囲内において、あるいは均等の範囲内において、種々の修正や変形を加えることが可能である。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

この発明は、鉄道車両主電動機等に使用される転がり軸受に有利に利用される。   The present invention is advantageously used for rolling bearings used in railway vehicle main motors and the like.

この発明の一実施形態に係る円筒ころ軸受を示す図である。It is a figure which shows the cylindrical roller bearing which concerns on one Embodiment of this invention. 図１の密封シールの正面図である。FIG. 2 is a front view of the hermetic seal of FIG. 1. 図１の密封シールの拡大断面図である。It is an expanded sectional view of the hermetic seal of FIG. 図１の円筒ころ軸受に用いる密封シールの他の実施形態であって、内輪側の壁面と外輪側の壁面とが同一寸法である例を示す図である。FIG. 6 is a view showing another embodiment of the hermetic seal used for the cylindrical roller bearing of FIG. 1, and shows an example in which the inner ring wall surface and the outer ring wall surface have the same dimensions. 図１の円筒ころ軸受に用いる密封シールの他の実施形態であって、外輪側の壁面が内輪側の壁面より長い例を示す図である。FIG. 5 is a view showing another embodiment of the hermetic seal used for the cylindrical roller bearing of FIG. 1, and showing an example in which the outer ring wall surface is longer than the inner ring wall surface. 図１の円筒ころ軸受に用いる密封シールの他の実施形態であって、連続領域を径方向外側に設けた例を示す図である。It is other embodiment of the sealing seal used for the cylindrical roller bearing of FIG. 1, Comprising: It is a figure which shows the example which provided the continuous area | region in the radial direction outer side. 図１の円筒ころ軸受に用いる密封シールの他の実施形態であって、連続領域を径方向内側に設けた例を示す図である。It is other embodiment of the seal seal used for the cylindrical roller bearing of FIG. 1, Comprising: It is a figure which shows the example which provided the continuous area | region inside radial direction. 従来の標準的なころ軸受を示す図である。It is a figure which shows the conventional standard roller bearing. 内輪の軸方向幅を外輪と比較して広くして、軸受内部空間を大きくしたころ軸受の一例を示す図である。It is a figure which shows an example of the roller bearing which expanded the axial direction width | variety of the inner ring | wheel compared with the outer ring | wheel, and enlarged the bearing internal space. 密封シールを内輪および外輪の端面から突出させて、軸受内部空間を大きくしたころ軸受の他の例を示す図である。It is a figure which shows the other example of the roller bearing which made the seal seal protrude from the end surface of an inner ring | wheel and an outer ring | wheel, and enlarged the bearing internal space.

符号の説明Explanation of symbols

１，２１，３１ 円筒ころ軸受、２，１２，２２，３２ 内輪、３，１３，２３，３３ 外輪、４，１４，２４，３４ 円筒ころ、５，１５，２５，３５ 保持器、６，１６，２６，３６，４６，５６，６６，７６ 密封シール、１６ａ 芯金、１６ｂ 絶縁性樹脂、２７ 絶縁材料、２８，３７，４７，５７，６７，７７ 堰、２９ グリース注入口、３６ａ 分割領域、３６ｂ，４６ｂ，５６ｂ，６６ｂ，７６ｂ 連続領域。   1, 21, 31 Cylindrical roller bearing, 2, 12, 22, 32 Inner ring, 3, 13, 23, 33 Outer ring, 4, 14, 24, 34 Cylindrical roller, 5, 15, 25, 35 Cage, 6, 16 , 26, 36, 46, 56, 66, 76 Sealing seal, 16a cored bar, 16b insulating resin, 27 insulating material, 28, 37, 47, 57, 67, 77 weir, 29 grease inlet, 36a divided region, 36b, 46b, 56b, 66b, 76b Continuous region.

Claims (4)

内輪と、
外輪と、
前記内輪および前記外輪の間に配置された複数の転動体と、
軸受両端部を密封する密封部材とを備え、
前記内輪の内径面および端面、または前記外輪の外径面および端面には、絶縁層が設けられ、
前記密封部材は、樹脂材料で形成され、前記内輪および前記外輪の両端面からコの字型の断面形状で突出する、転がり軸受。 Inner ring,
Outer ring,
A plurality of rolling elements disposed between the inner ring and the outer ring;
A sealing member for sealing both ends of the bearing,
An insulating layer is provided on the inner diameter surface and the end surface of the inner ring, or on the outer diameter surface and the end surface of the outer ring,
The sealing member is a rolling bearing formed of a resin material and protruding in a U-shaped cross-sectional shape from both end faces of the inner ring and the outer ring. 前記密封部材は、内壁面から突出する堰によって円周方向に区切られた複数の分割領域を有する、請求項１に記載の転がり軸受。   The rolling bearing according to claim 1, wherein the sealing member has a plurality of divided regions that are divided in a circumferential direction by a weir protruding from an inner wall surface. 前記密封部材は、隣接する前記分割領域間に連通する連続領域を有する、請求項２に記載の転がり軸受。   The rolling bearing according to claim 2, wherein the sealing member has a continuous region communicating between the adjacent divided regions. 前記連続領域は、前記密封部材の開口端側に位置する、請求項３に記載の転がり軸受。   The rolling bearing according to claim 3, wherein the continuous region is located on an opening end side of the sealing member.
JP2005268595A 2005-09-15 2005-09-15 Rolling bearing Pending JP2007078115A (en)

Priority Applications (5)

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JP2005268595A JP2007078115A (en) 2005-09-15 2005-09-15 Rolling bearing
DE112006002478T DE112006002478T5 (en) 2005-09-15 2006-08-30 Rolling bearing and axle support structure of a main motor for rail vehicle
US11/992,071 US20090116776A1 (en) 2005-09-15 2006-08-30 Rolling Bearing and Spindle Support Structure of Main Motor for Railway Vehicle
CN2006800333713A CN101263312B (en) 2005-09-15 2006-08-30 Rolling bearing and main shaft supporting structure for main motor of railway vehicle
PCT/JP2006/317101 WO2007043249A1 (en) 2005-09-15 2006-08-30 Rolling bearing and main shaft supporting structure for main motor of railway vehicle

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CN103758873A (en) * 2013-12-12 2014-04-30 洛阳轴研科技股份有限公司 Grease lubrication sealing bearing
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