JP2018179023A - Bearing - Google Patents

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JP2018179023A
JP2018179023A JP2017073923A JP2017073923A JP2018179023A JP 2018179023 A JP2018179023 A JP 2018179023A JP 2017073923 A JP2017073923 A JP 2017073923A JP 2017073923 A JP2017073923 A JP 2017073923A JP 2018179023 A JP2018179023 A JP 2018179023A
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outer ring
inner ring
bearing
ring
raceway groove
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馬嶋　一隆
Kazutaka Majima
一隆 馬嶋
敏樹 伊藤
Toshiki Ito
敏樹 伊藤
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Ibiden Co Ltd
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Ibiden Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a bearing which can be used under a high temperature and/or corrosive environment.SOLUTION: A bearing includes: an inner ring having a raceway groove at an outer periphery; an outer ring having a raceway groove at an inner periphery; and multiple rolling elements disposed between the inner ring and the outer ring. The inner ring, the outer ring, and the rolling elements are made of ceramic. The outer ring includes a first member and a second member which are joined so as to face each other in an axial direction. A joint part of the first member and the second member is located in the raceway groove of the outer ring.SELECTED DRAWING: Figure 1

Description

本発明は、軸受に関する。 The present invention relates to a bearing.

高温で使用可能な軸受として、特許文献１には、ステンレス製の内外輪の軌道溝にセラミック製のボールである複数の転動体が嵌め合わされた耐熱深溝玉軸受が開示されている。特許文献１に記載の軸受では、上記転動体の配列が該転動体を保持器で保持しない総玉構造であると共に、該転動体が配列された周方向にて該転動体１つないし２つ分の隙間を設け、該転動体と該軌道溝の間に所定のクリアランスを設け、高温雰囲気において該転動体の動きが上記内外輪によって拘束されないようにしたことを特徴としている。 As a bearing usable at high temperature, Patent Document 1 discloses a heat resistant deep groove ball bearing in which a plurality of rolling elements, which are balls made of ceramic, are fitted in raceways of inner and outer rings made of stainless steel. In the bearing described in Patent Document 1, the arrangement of the rolling elements has a full ball structure in which the rolling elements are not held by a cage, and one or two of the rolling elements in the circumferential direction in which the rolling elements are arranged. It is characterized in that a minute gap is provided and a predetermined clearance is provided between the rolling element and the raceway groove so that the movement of the rolling element is not restrained by the inner and outer rings in a high temperature atmosphere.

特開２０１０−１３３４６２号公報JP, 2010-133462, A

特許文献１に記載の軸受では、転動体が保持器で保持されていないことに加えて、転動体が配列された周方向にて該転動体１つないし２つ分の隙間を設けられているため、転動体が周方向に移動する虞がある。そのため、内輪の外周面の全周に沿って同軸状に取付溝を設け、該取付溝に環状の内輪プレートを嵌め合わせている。しかし、取付溝及び内輪プレートが設けられる分、軸受の構造が複雑となっている。 In the bearing described in Patent Document 1, in addition to the rolling elements being not held by the cage, a gap for one or two rolling elements is provided in the circumferential direction in which the rolling elements are arranged. Therefore, the rolling elements may move in the circumferential direction. Therefore, a mounting groove is provided coaxially along the entire circumference of the outer peripheral surface of the inner ring, and an annular inner ring plate is fitted to the mounting groove. However, since the mounting groove and the inner ring plate are provided, the structure of the bearing is complicated.

また、特許文献１に記載の軸受では、内外輪が金属のステンレス製であるため、高温での使用や腐食性環境下での使用に制限があった。 Further, in the bearing described in Patent Document 1, since the inner and outer rings are made of metal stainless steel, there have been limitations on use at high temperature and use in a corrosive environment.

本発明は、上記の問題を解決するためになされたものであり、高温及び／又は腐食性環境下で使用することができる軸受を提供することを目的とする。 The present invention has been made to solve the above problems, and it is an object of the present invention to provide a bearing that can be used under high temperature and / or corrosive environment.

本発明の軸受は、第１の態様において、外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、上記内輪と上記外輪との間に配置された複数の転動体とからなる軸受であって、上記内輪、上記外輪及び上記転動体は、セラミックからなり、上記外輪は、軸方向に向き合うように接合された第１部材と第２部材とを備え、上記第１部材と上記第２部材との接合部は、上記外輪の軌道溝に位置することを特徴とする。 The bearing according to the present invention, in the first aspect, comprises an inner ring having a raceway groove on the outer periphery, an outer ring having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner ring and the outer ring. A bearing, wherein the inner ring, the outer ring, and the rolling element are made of ceramic, and the outer ring includes a first member and a second member joined so as to face each other in the axial direction, the first member and the above A junction with the second member is located in the raceway groove of the outer ring.

本発明の軸受は、第２の態様において、外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、上記内輪と上記外輪との間に配置された複数の転動体とからなる軸受であって、上記内輪、上記外輪及び上記転動体は、セラミックからなり、上記内輪は、軸方向に向き合うように接合された第１部材と第２部材とを備え、上記第１部材と上記第２部材との接合部は、上記内輪の軌道溝に位置することを特徴とする。 The bearing according to the present invention, in the second aspect, comprises an inner ring having a raceway groove on the outer periphery, an outer ring having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner ring and the outer ring. A bearing, wherein the inner ring, the outer ring, and the rolling element are made of ceramic, and the inner ring includes a first member and a second member joined so as to face in the axial direction, and the first member and the second member. A junction with the second member is located in the raceway groove of the inner ring.

以下、本発明の第１の態様及び第２の態様を特に区別しない場合、単に「本発明の軸受」という。 Hereinafter, when the first aspect and the second aspect of the present invention are not particularly distinguished, they are simply referred to as “the bearing of the present invention”.

本発明の軸受においては、軸受を構成する内輪、外輪及び転動体がセラミックからなる、言い換えると、軸受がセラミックのみからなる。そのため、高温及び／又は腐食性環境下で軸受を使用することができる。 In the bearing of the present invention, the inner ring, the outer ring, and the rolling elements constituting the bearing are made of ceramic, in other words, the bearing is made only of ceramic. As such, the bearings can be used in high temperature and / or corrosive environments.

さらに、第１の態様では外輪、第２の態様では内輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、第１部材と第２部材との接合部が軌道溝に位置することを特徴としている。そのため、転動体を所定の位置に配置した後に第１部材と第２部材とを接合することによって、転動体を保持するための保持器を使用しなくても、転動体が敷き詰められた軸受を容易に作製することができる。また、特許文献１に記載の軸受と異なり、内輪プレート等を設けなくても転動体の位置を固定することができる。このように、本発明においては、軸受の構造を単純なものとすることができる。 Furthermore, in the first aspect, the outer ring in the first aspect, and in the second aspect, the inner ring includes the first member and the second member joined so as to face in the axial direction, and the joint between the first member and the second member is a track It is characterized by being located in a groove. Therefore, by arranging the rolling elements in a predetermined position and joining the first member and the second member, the bearing in which the rolling elements are spread can be used without using a cage for holding the rolling elements. It can be easily produced. Moreover, unlike the bearing described in Patent Document 1, the position of the rolling element can be fixed without providing the inner ring plate or the like. Thus, in the present invention, the structure of the bearing can be simplified.

なお、破損しやすいセラミック製の保持器を使用しないことにより、破損しにくい軸受とすることができる。 In addition, by not using a ceramic holder that is easily broken, the bearing can be made hard to be broken.

本発明の軸受において、上記内輪、上記外輪及び上記転動体は、窒化ケイ素、窒化アルミニウム、アルミナ及び黒鉛からなる群より選択される少なくとも１種のセラミックからなることが好ましい。これらのセラミックは、耐熱性及び耐食性に優れているため、高温及び／又は腐食性環境下で軸受を使用することができる。 In the bearing of the present invention, the inner ring, the outer ring and the rolling element are preferably made of at least one ceramic selected from the group consisting of silicon nitride, aluminum nitride, alumina and graphite. Because these ceramics are excellent in heat resistance and corrosion resistance, bearings can be used in high temperature and / or corrosive environments.

本発明の軸受において、上記第１部材と上記第２部材とは、接合層を介して接合されていることが好ましい。上記接合層は、炭素又は炭化ケイ素からなることが好ましい。
上記接合層は、例えば、第１部材と第２部材との間に樹脂を塗布した後、焼成することにより形成される。樹脂としてコプナ樹脂を用いた場合には、焼成後に炭素からなる接合層が得られ、また、樹脂としてポリカルボシランを用いた場合には、焼成後に炭化ケイ素からなる接合層が得られる。 In the bearing according to the present invention, preferably, the first member and the second member are joined via a joining layer. The bonding layer is preferably made of carbon or silicon carbide.
The bonding layer is formed, for example, by applying a resin between the first member and the second member and then baking it. When COPNA resin is used as the resin, a bonding layer made of carbon is obtained after firing, and when polycarbosilane is used as the resin, a bonding layer made of silicon carbide is obtained after firing.

本発明の軸受において、上記接合部は、上記第１部材及び上記第２部材の一方が凸で他方が凹のインロー構造（ｓｐｉｇｏｔ ｓｔｒｕｃｔｕｒｅ）を有していることが好ましい。この場合、第１部材と第２部材とを互いに嵌め合わすことができるため、強固に接合することができる。 In the bearing according to the present invention, preferably, the joint has a spigot structure in which one of the first member and the second member is convex and the other is concave. In this case, since the first member and the second member can be fitted to each other, they can be joined firmly.

本発明の軸受において、上記第１部材と上記第２部材とは、上記外輪又は上記内輪を上記軸方向から挟む把持具によって接合されていることが好ましい。第１部材と第２部材とを把持具によって機械的に挟むことによって、強固に接合することができる。 In the bearing according to the present invention, it is preferable that the first member and the second member be joined by a holding tool which holds the outer ring or the inner ring in the axial direction. By mechanically sandwiching the first member and the second member by the holding tool, they can be firmly joined.

本発明の軸受は、第３の態様において、外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、上記内輪と上記外輪との間に配置された複数の転動体とからなる軸受であって、上記内輪、上記外輪及び上記転動体は、窒化ケイ素、窒化アルミニウム、アルミナ及び黒鉛からなる群より選択される少なくとも１種のセラミックからなることを特徴とする。 The bearing according to the present invention, in the third aspect, comprises an inner ring having a raceway groove on the outer periphery, an outer ring having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner ring and the outer ring. A bearing, wherein the inner ring, the outer ring and the rolling element are made of at least one ceramic selected from the group consisting of silicon nitride, aluminum nitride, alumina and graphite.

本発明の第３の態様では、第１の態様及び第２の態様と同様、軸受がセラミックのみからなる。特に、第３の態様では、内輪、外輪及び転動体が、窒化ケイ素、窒化アルミニウム、アルミナ及び黒鉛からなる群より選択される少なくとも１種のセラミックからなる。これらのセラミックは、耐熱性及び耐食性に優れているため、高温及び／又は腐食性環境下で軸受を使用することができる。 In the third aspect of the present invention, as in the first and second aspects, the bearing is made of only ceramic. In particular, in the third aspect, the inner ring, the outer ring and the rolling elements are made of at least one ceramic selected from the group consisting of silicon nitride, aluminum nitride, alumina and graphite. Because these ceramics are excellent in heat resistance and corrosion resistance, bearings can be used in high temperature and / or corrosive environments.

図１は、本発明の第１実施形態に係る軸受の一例を模式的に示す斜視図である。FIG. 1 is a perspective view schematically showing an example of a bearing according to a first embodiment of the present invention. 図２は、本発明の第１実施形態に係る軸受の一例を模式的に示す平面図である。FIG. 2 is a plan view schematically showing an example of a bearing according to the first embodiment of the present invention. 図３は、図２に示す軸受のＩＩＩ−ＩＩＩ線断面図である。FIG. 3 is a sectional view taken along line III-III of the bearing shown in FIG. 図４は、外輪の第１部材と第２部材との接合部の一例を模式的に示す断面図である。FIG. 4 is a cross-sectional view schematically showing an example of a joint between the first member and the second member of the outer ring. 図５は、外輪の第１部材と第２部材との接合部の他の一例を模式的に示す断面図である。FIG. 5 is a cross-sectional view schematically showing another example of the joint between the first member and the second member of the outer ring. 図６は、把持具によって把持された外輪の一例を模式的に示す断面図である。FIG. 6 is a cross-sectional view schematically showing an example of the outer ring gripped by the gripping tool. 図７は、本発明の第２実施形態に係る軸受の一例を模式的に示す断面図である。FIG. 7 is a cross-sectional view schematically showing an example of a bearing according to a second embodiment of the present invention. 図８は、本発明の他の実施形態に係る軸受の一例を模式的に示す断面図である。FIG. 8 is a cross-sectional view schematically showing an example of a bearing according to another embodiment of the present invention.

（発明の詳細な説明）
以下、本発明の軸受について説明する。
本発明の軸受は、外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、上記内輪と上記外輪との間に配置された複数の転動体とからなる。本発明の軸受は、転動体を保持するための保持器を備えていないため、転動体が保持器によって保持されていない総玉構造を有している。破損しやすいセラミック製の保持器を使用しないことにより、破損しにくい軸受とすることができる。 (Detailed Description of the Invention)
Hereinafter, the bearing of the present invention will be described.
The bearing according to the present invention comprises an inner ring having a raceway groove on the outer periphery, an outer ring having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner ring and the outer ring. Since the bearing of the present invention does not have a cage for holding the rolling elements, it has a general ball structure in which the rolling elements are not held by the cage. By not using a fragile ceramic cage, the bearing can be made hard to break.

本発明の軸受において、内輪、外輪及び転動体は、セラミックからなる。軸受がセラミックのみからなるため、高温及び／又は腐食性環境下で軸受を使用することができる。内輪、外輪及び転動体は、同一のセラミックから構成されていることが好ましいが、異なるセラミックの組み合わせから構成されていてもよい。 In the bearing of the present invention, the inner ring, the outer ring and the rolling elements are made of ceramic. The bearings can be used in high temperature and / or corrosive environments because the bearings are only ceramic. The inner ring, the outer ring and the rolling elements are preferably made of the same ceramic, but may be made of a combination of different ceramics.

内輪、外輪及び転動体を構成するセラミックとしては特に限定されず、例えば、窒化ケイ素、窒化アルミニウム、窒化ホウ素、窒化チタン等の窒化物セラミック、アルミナ、シリカ、ジルコニア等の酸化物セラミック、炭化ケイ素、炭化チタン等の炭化物セラミック、黒鉛、ガラス状カーボン等のカーボン等を挙げることができる。これらのセラミックは、耐熱性及び耐食性に優れている。中でも、内輪、外輪及び転動体は、窒化ケイ素、窒化アルミニウム、アルミナ及び黒鉛からなる群より選択される少なくとも１種のセラミックからなることが好ましい。上述したように、内輪、外輪及び転動体は、同一のセラミックから構成されていてもよいし、異なるセラミックの組み合わせから構成されていてもよい。 The ceramic constituting the inner ring, the outer ring and the rolling elements is not particularly limited, and examples thereof include nitride ceramics such as silicon nitride, aluminum nitride, boron nitride and titanium nitride, oxide ceramics such as alumina, silica and zirconia, silicon carbide, Examples thereof include carbide ceramics such as titanium carbide, and carbon such as graphite and glassy carbon. These ceramics are excellent in heat resistance and corrosion resistance. Among them, the inner ring, the outer ring and the rolling element are preferably made of at least one ceramic selected from the group consisting of silicon nitride, aluminum nitride, alumina and graphite. As described above, the inner ring, the outer ring, and the rolling elements may be made of the same ceramic, or may be made of a combination of different ceramics.

以下に示す各実施形態は例示であり、異なる実施形態で示した構成の部分的な置換又は組み合わせが可能である。第２実施形態以降では、第１実施形態と共通の事項についての記述は省略し、異なる点についてのみ説明する。特に、同様の構成による同様の作用効果については、実施形態毎には逐次言及しない。 Each embodiment shown below is an illustration, and partial substitution or combination of composition shown in a different embodiment is possible. In the second and subsequent embodiments, descriptions of items common to the first embodiment will be omitted, and only different points will be described. In particular, the same operation and effect by the same configuration will not be sequentially referred to in each embodiment.

［第１実施形態］
本発明の第１実施形態では、外輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、第１部材と第２部材との接合部が外輪の軌道溝に位置することを特徴とする。 First Embodiment
In the first embodiment of the present invention, the outer ring includes the first member and the second member joined so as to face each other in the axial direction, and the joint between the first member and the second member is positioned in the raceway groove of the outer ring It is characterized by

図１は、本発明の第１実施形態に係る軸受の一例を模式的に示す斜視図である。図２は、本発明の第１実施形態に係る軸受の一例を模式的に示す平面図である。図３は、図２に示す軸受のＩＩＩ−ＩＩＩ線断面図である。 FIG. 1 is a perspective view schematically showing an example of a bearing according to a first embodiment of the present invention. FIG. 2 is a plan view schematically showing an example of a bearing according to the first embodiment of the present invention. FIG. 3 is a sectional view taken along line III-III of the bearing shown in FIG.

図１、図２及び図３に示す軸受１は、外周に軌道溝１５を有する内輪１０と、内周に軌道溝２５を有する外輪２０と、内輪１０と外輪２０との間に配置された複数の転動体３０とを備えている。軸受１において、転動体３０はボールであり、互いに密着するように、周方向（図２中、両矢印Ａで示す方向）に敷き詰められている。転動体３０はボールに限定されず、ピン又はローラ等であってもよい。 The bearing 1 shown in FIG. 1, FIG. 2 and FIG. 3 includes a plurality of inner rings 10 having raceways 15 on the outer circumference, an outer ring 20 having raceways 25 on the inner circumference, and a plurality of rings disposed between the inner and outer rings 10 and 20 And the rolling element 30 of FIG. In the bearing 1, the rolling elements 30 are balls, and are closely spaced in the circumferential direction (the direction indicated by the double arrow A in FIG. 2) so as to be in close contact with each other. The rolling elements 30 are not limited to balls, and may be pins or rollers.

外輪２０は、第１部材２１と第２部材２２とを備えている。図３に示すように、第１部材２１と第２部材２２とは、軸方向（図３中、両矢印Ｂで示す方向）に向き合うように接合されており、第１部材２１と第２部材２２との接合部２３は、外輪２０の軌道溝２５に位置している。 The outer ring 20 includes a first member 21 and a second member 22. As shown in FIG. 3, the first member 21 and the second member 22 are joined so as to face each other in the axial direction (direction shown by the double arrow B in FIG. 3), and the first member 21 and the second member The joint 23 with the joint 22 is located in the raceway groove 25 of the outer ring 20.

外輪の第１部材及び第２部材の構成は、軸方向に向き合うように接合され、接合部が外輪の軌道溝に位置する限り、特に限定されない。図１、図２及び図３に示す軸受１においては、第１部材２１及び第２部材２２がそれぞれ単一の部材から構成されているが、分割された複数の部材から構成されていてもよい。 The configurations of the first member and the second member of the outer ring are not particularly limited as long as they are joined to face each other in the axial direction and the joint portion is positioned in the raceway groove of the outer ring. In the bearing 1 shown in FIG. 1, FIG. 2 and FIG. 3, the first member 21 and the second member 22 are respectively constituted by a single member, but may be constituted by a plurality of divided members .

外輪の第１部材と第２部材とは、どのような方法で接合されていてもよい。例えば、外輪の第１部材と第２部材とは、接合層を介して接合されていることが好ましい。上記接合層は、炭素又は炭化ケイ素からなることが好ましい。
上記接合層は、例えば、第１部材と第２部材との間に樹脂を塗布した後、焼成することにより形成される。樹脂としてコプナ樹脂を用いた場合には、焼成後に炭素からなる接合層が得られ、また、樹脂としてポリカルボシランを用いた場合には、焼成後に炭化ケイ素からなる接合層が得られる。 The first member and the second member of the outer ring may be joined by any method. For example, it is preferable that the first member and the second member of the outer ring be joined via a joining layer. The bonding layer is preferably made of carbon or silicon carbide.
The bonding layer is formed, for example, by applying a resin between the first member and the second member and then baking it. When COPNA resin is used as the resin, a bonding layer made of carbon is obtained after firing, and when polycarbosilane is used as the resin, a bonding layer made of silicon carbide is obtained after firing.

図４は、外輪の第１部材と第２部材との接合部の一例を模式的に示す断面図である。
図４では、外輪２０の第１部材２１と第２部材２２とは、接合層２４を介して接合されている。 FIG. 4 is a cross-sectional view schematically showing an example of a joint between the first member and the second member of the outer ring.
In FIG. 4, the first member 21 and the second member 22 of the outer ring 20 are joined via the joining layer 24.

接合部は、外輪の第１部材及び第２部材の一方が凸で他方が凹のインロー構造を有していることが好ましい。この場合、第１部材と第２部材とを互いに嵌め合わすことができるため、強固に接合することができる。なお、接合部は、インロー構造を有していなくてもよい。 Preferably, the joint portion has an inlay structure in which one of the first member and the second member of the outer ring is convex and the other is concave. In this case, since the first member and the second member can be fitted to each other, they can be joined firmly. The joint portion may not have the inlay structure.

図４に示す接合部２３は、インロー構造を有しており、具体的には、第１部材２１及び第２部材２２の凹凸が垂直の段差形状となっている。 The joint portion 23 shown in FIG. 4 has an inlay structure, and specifically, the unevenness of the first member 21 and the second member 22 has a vertical step shape.

図５は、外輪の第１部材と第２部材との接合部の他の一例を模式的に示す断面図である。
図５に示す接合部２３ａは、インロー構造を有しており、具体的には、第１部材２１及び第２部材２２の凹凸がテーパー形状となっている。 FIG. 5 is a cross-sectional view schematically showing another example of the joint between the first member and the second member of the outer ring.
The joint portion 23a shown in FIG. 5 has an inlay structure, and specifically, the unevenness of the first member 21 and the second member 22 is tapered.

また、外輪の第１部材と第２部材とは、外輪を軸方向から挟む把持具によって接合されていることが好ましい。第１部材と第２部材とを把持具によって機械的に挟むことによって、強固に接合することができる。 Moreover, it is preferable that the 1st member and 2nd member of outer ring | wheel are joined by the holding tool which clamps an outer ring | wheel from an axial direction. By mechanically sandwiching the first member and the second member by the holding tool, they can be firmly joined.

把持具は、外輪の第１部材及び第２部材を軸方向から挟んで把持し得る構造を有していればよく、具体的な構成は特に限定されない。把持具として、例えば、クランプ等を用いることができる。 The holding | grip tool should just have a structure which can pinch and hold the 1st member and 2nd member of an outer ring | wheel from an axial direction, and a specific structure is not specifically limited. For example, a clamp etc. can be used as a holding tool.

図６は、把持具によって把持された外輪の一例を模式的に示す断面図である。
図６では、外輪２０の第１部材２１と第２部材２２とは、把持具４０によって軸方向から挟まれている。 FIG. 6 is a cross-sectional view schematically showing an example of the outer ring gripped by the gripping tool.
In FIG. 6, the first member 21 and the second member 22 of the outer ring 20 are pinched in the axial direction by the holding tool 40.

外輪の第１部材と第２部材との接合は、図６に示すように、接合層を介した接合と把持具による接合とを組み合わせることがより好ましい。この場合、第１部材と第２部材とを強固に接合することができる。 As for joining of the first member and the second member of the outer ring, as shown in FIG. 6, it is more preferable to combine joining via a joining layer and joining by a holding tool. In this case, the first member and the second member can be firmly joined.

本発明の第１実施形態に係る軸受は、好ましくは、以下のように製造される。 The bearing according to the first embodiment of the present invention is preferably manufactured as follows.

まず、セラミック製の内輪、外輪及び転動体を作製する。外輪の第１部材及び第２部材は、それぞれ個別に作製する。
セラミック製の内輪、外輪及び転動体は、例えば、黒鉛等のセラミック材料を含む原料粉末を所定の形状に成形し、焼成した後、切削あるいは研磨加工することにより得られる。 First, a ceramic inner ring, an outer ring, and rolling elements are manufactured. The first member and the second member of the outer ring are individually manufactured.
The inner ring, the outer ring and the rolling element made of ceramic are obtained, for example, by forming a raw material powder containing a ceramic material such as graphite into a predetermined shape, baking it, and cutting or polishing it.

次に、内輪と外輪とを同軸状に配置し、転動体を所定の位置に配置した後、外輪の第１部材と第２部材とを接合する。
例えば、第１部材と第２部材との間に樹脂を塗布し、その後、焼成することにより、接合層を介して外輪の第１部材と第２部材とを接合することができる。 Next, the inner ring and the outer ring are coaxially arranged, and after the rolling elements are arranged at predetermined positions, the first member and the second member of the outer ring are joined.
For example, by applying a resin between the first member and the second member and then firing the resin, it is possible to bond the first member and the second member of the outer ring via the bonding layer.

必要に応じて、外輪の第１部材と第２部材とを把持具によって軸方向から把持する。以上により、軸受が製造される。 If necessary, the first member and the second member of the outer ring are gripped from the axial direction by the gripping tool. Thus, the bearing is manufactured.

本発明の第１実施形態においては、転動体を所定の位置に配置した後に外輪の第１部材と第２部材とを接合することによって、転動体を保持するための保持器を使用しなくても、転動体が敷き詰められた軸受を容易に作製することができる。また、特許文献１に記載の軸受と異なり、内輪プレート等を設けなくても転動体の位置を固定することができる。このように、本発明の第１実施形態においては、軸受の構造を単純なものとすることができる。 In the first embodiment of the present invention, the retainer for holding the rolling element is not used by joining the first member and the second member of the outer ring after arranging the rolling element at a predetermined position. Also, the bearing in which the rolling elements are spread can be easily manufactured. Moreover, unlike the bearing described in Patent Document 1, the position of the rolling element can be fixed without providing the inner ring plate or the like. Thus, in the first embodiment of the present invention, the structure of the bearing can be simplified.

［第２実施形態］
本発明の第２実施形態では、内輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、第１部材と第２部材との接合部が内輪の軌道溝に位置することを特徴とする。 Second Embodiment
In the second embodiment of the present invention, the inner ring includes the first member and the second member joined so as to face each other in the axial direction, and the joint between the first member and the second member is positioned in the raceway groove of the inner ring It is characterized by

図７は、本発明の第２実施形態に係る軸受の一例を模式的に示す断面図である。
図７に示す軸受２は、外周に軌道溝１５を有する内輪１０と、内周に軌道溝２５を有する外輪２０と、内輪１０と外輪２０との間に配置された複数の転動体３０とを備えている。 FIG. 7 is a cross-sectional view schematically showing an example of a bearing according to a second embodiment of the present invention.
The bearing 2 shown in FIG. 7 includes an inner race 10 having a raceway groove 15 on the outer periphery, an outer race 20 having a raceway groove 25 on the inner periphery, and a plurality of rolling elements 30 disposed between the inner race 10 and the outer race 20. Have.

内輪１０は、第１部材１１と第２部材１２とを備えている。図７に示すように、第１部材１１と第２部材１２とは、軸方向に向き合うように接合されており、第１部材１１と第２部材１２との接合部１３は、内輪１０の軌道溝１５に位置している。 The inner ring 10 includes a first member 11 and a second member 12. As shown in FIG. 7, the first member 11 and the second member 12 are joined so as to face each other in the axial direction, and the joint 13 of the first member 11 and the second member 12 is a track of the inner ring 10. It is located in the groove 15.

内輪の第１部材及び第２部材の構成は、本発明の第１実施形態で説明した外輪の第１部材及び第２部材の構成と同様である。したがって、本発明の第１実施形態で説明した「外輪の第１部材及び第２部材」を「内輪の第１部材及び第２部材」に読み替えればよい。また、転動体の構成は、本発明の第１実施形態と同じである。 The configurations of the first member and the second member of the inner ring are the same as the configurations of the first member and the second member of the outer ring described in the first embodiment of the present invention. Therefore, the "first and second members of the outer ring" described in the first embodiment of the present invention may be replaced with "the first and second members of the inner ring". Further, the configuration of the rolling element is the same as that of the first embodiment of the present invention.

内輪の第１部材と第２部材とは、どのような方法で接合されていてもよい。例えば、内輪の第１部材と第２部材とは、接合層を介して接合されていることが好ましい。上記接合層は、炭素又は炭化ケイ素からなることが好ましい。 The first member and the second member of the inner ring may be joined in any manner. For example, it is preferable that the first member and the second member of the inner ring be joined via the joining layer. The bonding layer is preferably made of carbon or silicon carbide.

接合部は、内輪の第１部材及び第２部材の一方が凸で他方が凹のインロー構造を有していることが好ましい。なお、接合部は、インロー構造を有していなくてもよい。 In the joint portion, it is preferable that one of the first member and the second member of the inner ring is convex and the other is concave inlay structure. The joint portion may not have the inlay structure.

また、内輪の第１部材と第２部材とは、内輪を軸方向から挟む把持具によって接合されていることが好ましい。 Moreover, it is preferable that the 1st member and 2nd member of an inner ring | wheel are joined by the holding tool which pinches | interposes an inner ring from an axial direction.

内輪の第１部材と第２部材との接合は、接合層を介した接合と把持具による接合とを組み合わせることがより好ましい。 More preferably, the bonding between the first member and the second member of the inner ring is a combination of bonding via a bonding layer and bonding by a holding tool.

本発明の第２実施形態においては、転動体を所定の位置に配置した後に内輪の第１部材と第２部材とを接合することによって、転動体を保持するための保持器を使用しなくても、転動体が敷き詰められた軸受を容易に作製することができる。また、特許文献１に記載の軸受と異なり、内輪プレート等を設けなくても転動体の位置を固定することができる。このように、本発明の第２実施形態においては、軸受の構造を単純なものとすることができる。 In the second embodiment of the present invention, a retainer for holding the rolling element is not used by joining the first member and the second member of the inner ring after arranging the rolling element at a predetermined position. Also, the bearing in which the rolling elements are spread can be easily manufactured. Moreover, unlike the bearing described in Patent Document 1, the position of the rolling element can be fixed without providing the inner ring plate or the like. Thus, in the second embodiment of the present invention, the structure of the bearing can be simplified.

［その他の実施形態］
本発明の軸受は、上記実施形態に限定されるものではない。例えば、外輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、外輪の第１部材と第２部材との接合部が外輪の軌道溝に位置するとともに、内輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、内輪の第１部材と第２部材との接合部が内輪の軌道溝に位置してもよい。 Other Embodiments
The bearing of the present invention is not limited to the above embodiment. For example, the outer ring includes a first member and a second member joined so as to face each other in the axial direction, the joint between the first member and the second member of the outer ring being positioned in the raceway groove of the outer ring, and the inner ring The joint may include a first member and a second member joined so as to face each other in the axial direction, and a joint between the first member and the second member of the inner ring may be located in the raceway groove of the inner ring.

図８は、本発明の他の実施形態に係る軸受の一例を模式的に示す断面図である。
図８に示す軸受３は、外周に軌道溝１５を有する内輪１０と、内周に軌道溝２５を有する外輪２０と、内輪１０と外輪２０との間に配置された複数の転動体３０とを備えている。 FIG. 8 is a cross-sectional view schematically showing an example of a bearing according to another embodiment of the present invention.
The bearing 3 shown in FIG. 8 includes an inner race 10 having a raceway groove 15 on the outer periphery, an outer race 20 having a raceway groove 25 on the inner periphery, and a plurality of rolling elements 30 disposed between the inner race 10 and the outer race 20. Have.

外輪２０は、第１部材２１と第２部材２２とを備えている。図８に示すように、第１部材２１と第２部材２２とは、軸方向に向き合うように接合されており、第１部材２１と第２部材２２との接合部２３は、外輪２０の軌道溝２５に位置している。 The outer ring 20 includes a first member 21 and a second member 22. As shown in FIG. 8, the first member 21 and the second member 22 are joined so as to face each other in the axial direction, and the joint portion 23 between the first member 21 and the second member 22 is a track of the outer ring 20. It is located in the groove 25.

内輪１０は、第１部材１１と第２部材１２とを備えている。図８に示すように、第１部材１１と第２部材１２とは、軸方向に向き合うように接合されており、第１部材１１と第２部材１２との接合部１３は、内輪１０の軌道溝１５に位置している。 The inner ring 10 includes a first member 11 and a second member 12. As shown in FIG. 8, the first member 11 and the second member 12 are joined so as to face each other in the axial direction, and the joint 13 of the first member 11 and the second member 12 is a track of the inner ring 10. It is located in the groove 15.

図８に示す軸受３は、図３に示す軸受１及び図７に示す軸受２を組み合わせた構成を有している。したがって、外輪の第１部材及び第２部材の構成、並びに、内輪の第１部材及び第２部材の構成は、本発明の第１実施形態及び第２実施形態で説明したとおりである。また、転動体の構成は、本発明の第１実施形態と同じである。 The bearing 3 shown in FIG. 8 has a configuration in which the bearing 1 shown in FIG. 3 and the bearing 2 shown in FIG. 7 are combined. Therefore, the configurations of the first member and the second member of the outer ring, and the configurations of the first member and the second member of the inner ring are as described in the first embodiment and the second embodiment of the present invention. Further, the configuration of the rolling element is the same as that of the first embodiment of the present invention.

また、上記実施形態では、外輪及び内輪の少なくとも一方が第１部材と第２部材とを備え、第１部材と第２部材とが接合されていたが、以下の特徴を有する軸受もまた、本発明の１つである。
外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、上記内輪と上記外輪との間に配置された複数の転動体とからなる軸受であって、上記内輪、上記外輪及び上記転動体は、窒化ケイ素、窒化アルミニウム、アルミナ及び黒鉛からなる群より選択される少なくとも１種のセラミックからなることを特徴とする軸受。 Further, in the above embodiment, at least one of the outer ring and the inner ring includes the first member and the second member, and the first member and the second member are joined. It is one of the inventions.
A bearing comprising an inner race having a raceway groove on the outer periphery, an outer race having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner race and the outer race, the inner race, the outer race and the outer race A rolling element is made of at least one ceramic selected from the group consisting of silicon nitride, aluminum nitride, alumina and graphite.

上記軸受において、内輪、外輪及び転動体は、同一のセラミックから構成されていてもよいし、異なるセラミックの組み合わせから構成されていてもよい。 In the above bearing, the inner ring, the outer ring and the rolling elements may be made of the same ceramic, or may be made of a combination of different ceramics.

上記軸受においては、外輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、第１部材と第２部材との接合部が外輪の軌道溝に位置するか、又は、内輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、第１部材と第２部材との接合部が内輪の軌道溝に位置することが好ましい。また、外輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、外輪の第１部材と第２部材との接合部が外輪の軌道溝に位置するとともに、内輪が、軸方向に向き合うように接合された第１部材と第２部材とを備え、内輪の第１部材と第２部材との接合部が内輪の軌道溝に位置してもよい。 In the above bearing, the outer ring includes the first member and the second member joined so as to face each other in the axial direction, and the joint portion between the first member and the second member is positioned in the raceway groove of the outer ring Preferably, the inner ring includes a first member and a second member joined so as to face each other in the axial direction, and a joint of the first member and the second member is positioned in a raceway groove of the inner ring. Further, the outer ring includes a first member and a second member joined so as to face each other in the axial direction, and a joint portion between the first member and the second member of the outer ring is positioned in a raceway groove of the outer ring The joint may include a first member and a second member joined so as to face each other in the axial direction, and a joint between the first member and the second member of the inner ring may be located in the raceway groove of the inner ring.

その他、軸受の構成、製造方法等に関し、本発明の範囲内において、種々の応用、変形を加えることが可能である。 In addition, various applications and modifications can be made within the scope of the present invention with regard to the configuration of the bearing, the manufacturing method, and the like.

１，２，３ 軸受
１０ 内輪
１１ 内輪の第１部材
１２ 内輪の第２部材
１３ 内輪の第１部材と第２部材との接合部
１５ 内輪の軌道溝
２０ 外輪
２１ 外輪の第１部材
２２ 外輪の第２部材
２３，２３ａ 外輪の第１部材と第２部材との接合部
２４ 接合層
２５ 外輪の軌道溝
３０ 転動体
４０ 把持具
Ａ 周方向
Ｂ 軸方向 1, 2, 3 Bearing 10 Inner ring 11 First member 12 of inner ring Second joint member 13 of inner ring 13 Joint portion between first member and second member of inner ring 15 Raceway groove 20 of inner ring Outer ring 21 First member of outer ring 22 Outer ring The second member 23, 23a The joint portion 24 between the first member and the second member of the outer ring The joint layer 25 the raceway groove 30 of the outer ring 30 the rolling element 40 the holding tool A circumferential direction B axial direction

Claims (8)

外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、前記内輪と前記外輪との間に配置された複数の転動体とからなる軸受であって、
前記内輪、前記外輪及び前記転動体は、セラミックからなり、
前記外輪は、軸方向に向き合うように接合された第１部材と第２部材とを備え、
前記第１部材と前記第２部材との接合部は、前記外輪の軌道溝に位置することを特徴とする軸受。 A bearing comprising an inner ring having a raceway groove on the outer periphery, an outer ring having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner ring and the outer ring,
The inner ring, the outer ring and the rolling element are made of ceramic,
The outer ring includes a first member and a second member joined so as to face in the axial direction,
A joint portion between the first member and the second member is located in a raceway groove of the outer ring. 外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、前記内輪と前記外輪との間に配置された複数の転動体とからなる軸受であって、
前記内輪、前記外輪及び前記転動体は、セラミックからなり、
前記内輪は、軸方向に向き合うように接合された第１部材と第２部材とを備え、
前記第１部材と前記第２部材との接合部は、前記内輪の軌道溝に位置することを特徴とする軸受。 A bearing comprising an inner ring having a raceway groove on the outer periphery, an outer ring having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner ring and the outer ring,
The inner ring, the outer ring and the rolling element are made of ceramic,
The inner ring includes a first member and a second member joined so as to face each other in the axial direction,
A joint characterized in that a joint between the first member and the second member is located in a raceway groove of the inner ring. 前記内輪、前記外輪及び前記転動体は、窒化ケイ素、窒化アルミニウム、アルミナ及び黒鉛からなる群より選択される少なくとも１種のセラミックからなる請求項１又は２に記載の軸受。 The bearing according to claim 1 or 2, wherein the inner ring, the outer ring and the rolling element are made of at least one ceramic selected from the group consisting of silicon nitride, aluminum nitride, alumina and graphite. 前記第１部材と前記第２部材とは、接合層を介して接合されている請求項１〜３のいずれか１項に記載の軸受。 The bearing according to any one of claims 1 to 3, wherein the first member and the second member are joined via a joining layer. 前記接合層は、炭素又は炭化ケイ素からなる請求項４に記載の軸受。 The bearing according to claim 4, wherein the bonding layer is made of carbon or silicon carbide. 前記接合部は、前記第１部材及び前記第２部材の一方が凸で他方が凹のインロー構造を有している請求項１〜５のいずれか１項に記載の軸受。 The bearing according to any one of claims 1 to 5, wherein in the joint portion, one of the first member and the second member has a convex and the other has a concave inlay structure. 前記第１部材と前記第２部材とは、前記外輪又は前記内輪を前記軸方向から挟む把持具によって接合されている請求項１〜６のいずれか１項に記載の軸受。 The bearing according to any one of claims 1 to 6, wherein the first member and the second member are joined by a holding tool which holds the outer ring or the inner ring in the axial direction. 外周に軌道溝を有する内輪と、内周に軌道溝を有する外輪と、前記内輪と前記外輪との間に配置された複数の転動体とからなる軸受であって、
前記内輪、前記外輪及び前記転動体は、窒化ケイ素、窒化アルミニウム、アルミナ及び黒鉛からなる群より選択される少なくとも１種のセラミックからなることを特徴とする軸受。 A bearing comprising an inner ring having a raceway groove on the outer periphery, an outer ring having a raceway groove on the inner periphery, and a plurality of rolling elements disposed between the inner ring and the outer ring,
A bearing characterized in that the inner ring, the outer ring and the rolling element are made of at least one ceramic selected from the group consisting of silicon nitride, aluminum nitride, alumina and graphite.
JP2017073923A 2017-04-03 2017-04-03 Bearing Pending JP2018179023A (en)

Priority Applications (1)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258845A2 (en) * 1986-08-29 1988-03-09 Kabushiki Kaisha Nagano Keiki Seisakusho Ceramics bearing
JPH0482432U (en) * 1990-11-28 1992-07-17
JPH0552336U (en) * 1991-11-05 1993-07-13 住友金属工業株式会社 Support device for dipping rolls in hot dip bath
JP2000065048A (en) * 1998-08-18 2000-03-03 Nippon Seiko Kk Non-separable rolling bearing
JP2003042147A (en) * 2001-07-25 2003-02-13 Shigeo Takahashi Polymer alloy ball bearing
JP2003172342A (en) * 2001-09-28 2003-06-20 Nsk Ltd Multi-point contact ball bearing for supporting ball screw
JP2005201327A (en) * 2004-01-14 2005-07-28 Nsk Ltd Rolling device
JP2005212593A (en) * 2004-01-29 2005-08-11 Ntn Corp Electric power steering device
JP2009236223A (en) * 2008-03-27 2009-10-15 Ntn Corp Rolling bearing
JP2011190848A (en) * 2010-03-12 2011-09-29 Nagoya Bearing Co Ltd Heat-resistant single-row deep-grooved ball bearing
JP2014015392A (en) * 2009-02-16 2014-01-30 Toshiba Corp Material for joining ceramics and method for manufacturing a ceramic composite member

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258845A2 (en) * 1986-08-29 1988-03-09 Kabushiki Kaisha Nagano Keiki Seisakusho Ceramics bearing
JPH0482432U (en) * 1990-11-28 1992-07-17
JPH0552336U (en) * 1991-11-05 1993-07-13 住友金属工業株式会社 Support device for dipping rolls in hot dip bath
JP2000065048A (en) * 1998-08-18 2000-03-03 Nippon Seiko Kk Non-separable rolling bearing
JP2003042147A (en) * 2001-07-25 2003-02-13 Shigeo Takahashi Polymer alloy ball bearing
JP2003172342A (en) * 2001-09-28 2003-06-20 Nsk Ltd Multi-point contact ball bearing for supporting ball screw
JP2005201327A (en) * 2004-01-14 2005-07-28 Nsk Ltd Rolling device
JP2005212593A (en) * 2004-01-29 2005-08-11 Ntn Corp Electric power steering device
JP2009236223A (en) * 2008-03-27 2009-10-15 Ntn Corp Rolling bearing
JP2014015392A (en) * 2009-02-16 2014-01-30 Toshiba Corp Material for joining ceramics and method for manufacturing a ceramic composite member
JP2011190848A (en) * 2010-03-12 2011-09-29 Nagoya Bearing Co Ltd Heat-resistant single-row deep-grooved ball bearing

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