JP2010053930A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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Publication number
JP2010053930A
JP2010053930A JP2008218361A JP2008218361A JP2010053930A JP 2010053930 A JP2010053930 A JP 2010053930A JP 2008218361 A JP2008218361 A JP 2008218361A JP 2008218361 A JP2008218361 A JP 2008218361A JP 2010053930 A JP2010053930 A JP 2010053930A
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Prior art keywords
annular portion
annular
axial direction
peripheral surface
cage
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Osamu Higashimoto
修 東本
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JTEKT Corp
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JTEKT Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3806—Details of interaction of cage and race, e.g. retention, centring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4605—Details of interaction of cage and race, e.g. retention or centring

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing which improves the lubricity between the inside circumferential surface of an outer ring and the outside circumferential surface of the annular part of a retainer, and which suppresses the seizure of the outside circumferential part of the retainer. <P>SOLUTION: An annular groove 15, which is opened outward in the axial direction, is formed in the external end surface in the axial direction of a first annular part 11 positioned on the introduction side of oil air A in the axial direction of the retainer 4. A plurality of passages 16, which communicate the annular groove 15 with the outside circumferential surface of the first annular part 11 guided by the outer ring 1, are also formed in the first annular part 11. In the first annular part 11, each passage 16 is formed so as to extend roughly in the radial direction. In the first annular part 11, the plurality of passages 16 are spaced at roughly the same intervals in the circumferential direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、転動体を有する転がり軸受に関し、特に、工作機械の主軸を回転自在に支持するのに使用されれば好ましい転がり軸受に関する。   The present invention relates to a rolling bearing having rolling elements, and more particularly to a rolling bearing that is preferably used for rotatably supporting a main shaft of a machine tool.

従来、転がり軸受としては、特開２００５−９８４５３号公報（特許文献１）に記載されている円筒ころ軸受がある。   Conventionally, as a rolling bearing, there is a cylindrical roller bearing described in JP-A-2005-98453 (Patent Document 1).

この円筒ころ軸受は、外輪、内輪、複数の円筒ころおよび保持器を備え、上記複数の円筒ころは、上記保持器によって保持された状態で、外輪と内輪との間に配置されている。上記保持器は、第１環状部、第２環状部および複数の柱部を有し、上記複数の柱部は、第１環状部と第２環状部とを連結している。上記複数の柱部は、第１環状部の周方向に互いに間隔をおいて位置している。   The cylindrical roller bearing includes an outer ring, an inner ring, a plurality of cylindrical rollers, and a cage, and the plurality of cylindrical rollers are disposed between the outer ring and the inner ring while being held by the cage. The cage includes a first annular portion, a second annular portion, and a plurality of column portions, and the plurality of column portions connect the first annular portion and the second annular portion. The plurality of column portions are located at intervals in the circumferential direction of the first annular portion.

上記各環状部は、その環状部の内周面と外周面との間を連通する通路を有している。この円筒ころ軸受は、この通路を介して、内輪と各環状部の内周面との間に存在する潤滑剤を遠心力で各環状部の外周面側に移動させて、外輪の内周面と各環状部の外周面とを潤滑するようになっている。このようにして、特に、保持器の環状部の外周面の焼付きを抑制するようにしている。   Each of the annular portions has a passage communicating between the inner peripheral surface and the outer peripheral surface of the annular portion. This cylindrical roller bearing moves the lubricant existing between the inner ring and the inner peripheral surface of each annular portion to the outer peripheral surface side of each annular portion by centrifugal force through this passage, and thereby the inner peripheral surface of the outer ring. And the outer peripheral surface of each annular portion are lubricated. In this way, in particular, seizure of the outer peripheral surface of the annular portion of the cage is suppressed.

このような背景において、保持器を外輪で案内する転がり軸受において、外輪の内周面と環状部の外周面との潤滑性を更に向上し、保持器の外周面の焼付きを更に抑制して欲しいという要請がある。   In such a background, in the rolling bearing that guides the cage with the outer ring, the lubricity between the inner circumferential surface of the outer ring and the outer circumferential surface of the annular portion is further improved, and seizure of the outer circumferential surface of the cage is further suppressed. There is a request to want.

また、特に、回転軸が数万回転の回転速度で回転する工作機械の主軸支持用の転がり軸受において、保持器の挙動を安定させて、低トルクを実現して欲しいという要請がある。
特開２００５−９８４５３号公報（第１図、第２図） In particular, in rolling bearings for supporting a spindle of a machine tool whose rotating shaft rotates at a rotational speed of tens of thousands of rotations, there is a demand for realizing a low torque by stabilizing the behavior of the cage.
Japanese Patent Laying-Open No. 2005-98453 (FIGS. 1 and 2)

そこで、本発明の課題は、外輪の内周面と、保持器の環状部の外周面との潤滑性を向上できて、保持器の外周面の焼付きを抑制できる転がり軸受を提供することにある。   Then, the subject of this invention is providing the rolling bearing which can improve the lubricity of the inner peripheral surface of an outer ring | wheel and the outer peripheral surface of the annular part of a cage | basket, and can suppress the seizure of the outer peripheral surface of a cage | basket. is there.

また、本発明の課題は、高速回転している回転軸を支持するのに使用した場合において、外輪の内周面と、保持器の環状部の外周面との潤滑性を向上できることに加えて、保持器の挙動の安定性に優れる転がり軸受を提供することにある。   Further, the object of the present invention is to improve lubricity between the inner peripheral surface of the outer ring and the outer peripheral surface of the annular portion of the cage when used to support a rotating shaft rotating at high speed. An object of the present invention is to provide a rolling bearing having excellent cage behavior stability.

上記課題を解決するため、この発明の転がり軸受は、
軌道面を内周面に有する外輪と、
軌道面を外周面に有する内輪と、
上記外輪の軌道面と、上記内輪の軌道面との間に配置された複数の転動体と、
上記複数の転動体を保持する保持器と
を備え、
上記保持器は、上記外輪の上記内周面に案内される外周面を有する環状部を有し、
上記環状部は、
上記環状部の軸方向の外方側の端面に位置して上記軸方向の外方に開口する凹部と、
上記凹部と上記環状部の上記外周面とを連通する通路と
を有することを特徴としている。 In order to solve the above problems, the rolling bearing of the present invention is
An outer ring having a raceway surface on the inner peripheral surface;
An inner ring having a raceway surface on the outer peripheral surface;
A plurality of rolling elements disposed between the raceway surface of the outer ring and the raceway surface of the inner ring;
A cage for holding the plurality of rolling elements,
The retainer has an annular portion having an outer peripheral surface guided by the inner peripheral surface of the outer ring,
The annular part is
A concave portion that is located on the outer end surface in the axial direction of the annular portion and opens outward in the axial direction;
It has the channel | path which connects the said recessed part and the said outer peripheral surface of the said annular part, It is characterized by the above-mentioned.

本発明によれば、上記環状部の軸方向の外方の端面が軸方向の外方側に開口する凹部を有しているから、外輪と内輪との間に向けて、軸方向の外方から軸方向に供給されるオイルエアを、円滑に上記凹部に導くことができる。また、凹部に浸入したオイルエアを、凹部よりもオイルエアの流れにおいて下流側に位置する上記通路を介して、外輪に案内される環状部の外周面に円滑に供給できる。したがって、外輪と内輪との間に向けて、軸方向の外方から軸方向に供給されるオイルエアを、従来よりも、より多くかつより円滑に、上記環状部の外周面に供給できる。したがって、従来よりも外輪に案内される保持器の外周面の焼付きの可能性を格段に小さくすることができる。   According to the present invention, since the outer end face in the axial direction of the annular portion has the concave portion that opens to the outer side in the axial direction, the outer side in the axial direction faces between the outer ring and the inner ring. The oil air supplied in the axial direction can be smoothly guided to the recess. Also, the oil air that has entered the recess can be smoothly supplied to the outer peripheral surface of the annular portion that is guided by the outer ring through the passage located downstream of the recess in the flow of oil air. Therefore, more and more oil air supplied in the axial direction from the outside in the axial direction toward the outer ring and the inner ring can be supplied to the outer peripheral surface of the annular portion more than before. Therefore, the possibility of seizure of the outer peripheral surface of the cage guided by the outer ring can be significantly reduced as compared with the conventional case.

また、オイルエアを保持器の外周面（外輪案内面）へ効率良く供給することがで、オイルエアの量を低減することができる。したがって、環境の保全に寄与することができる。   Moreover, the amount of oil air can be reduced by efficiently supplying oil air to the outer peripheral surface (outer ring guide surface) of the cage. Therefore, it can contribute to environmental conservation.

また、一実施形態では、
上記凹部は、環状溝であり、
上記環状部は、複数の上記通路を有し、
上記各通路は、略上記環状部の径方向に延在し、
上記複数の通路は、上記環状部の周方向に略等間隔に配置されている。 In one embodiment,
The recess is an annular groove;
The annular portion has a plurality of the passages,
Each of the passages extends substantially in the radial direction of the annular portion,
The plurality of passages are arranged at substantially equal intervals in the circumferential direction of the annular portion.

上記実施形態によれば、上記凹部は、環状溝であり、上記環状部は、複数の上記通路を有し、上記各通路は、略径方向に延在し、上記複数の通路は、周方向に略等間隔に配置されているから、各通路から吹き出すオイルエアの流れの方向が径方向になり、かつ、複数の通路から吹き出すオイルエアの量が、周方向において略均等になる。したがって、保持器の挙動を安定させることができて、保持器のオイルエアの攪拌抵抗を低減できて、トルクを低減できる。   According to the embodiment, the concave portion is an annular groove, the annular portion has a plurality of the passages, the passages extend in a substantially radial direction, and the plurality of passages are in a circumferential direction. Therefore, the direction of the flow of oil air blown out from each passage is the radial direction, and the amount of oil air blown out from the plurality of passages is substantially uniform in the circumferential direction. Accordingly, the behavior of the cage can be stabilized, the oil / air stirring resistance of the cage can be reduced, and the torque can be reduced.

本発明の転がり軸受によれば、外輪と内輪との間に向けて、軸方向の外方から軸方向に供給されるオイルエアを、従来よりも、外輪に案内される保持器の環状部の外周面に、より多くかつより円滑に供給できて、従来よりも上記保持器の環状部の外周面の焼付きの可能性を格段に小さくすることができる。   According to the rolling bearing of the present invention, the oil / air supplied in the axial direction from the outside in the axial direction toward the space between the outer ring and the inner ring is more than the outer periphery of the annular portion of the cage guided by the outer ring. The surface can be supplied more smoothly and more smoothly, and the possibility of seizure of the outer peripheral surface of the annular portion of the cage can be remarkably reduced as compared with the conventional case.

以下、本発明を図示の形態により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the drawings.

図１は、本発明の転がり軸受の一実施形態であるアンギュラ玉軸受の軸方向の模式断面図である。   FIG. 1 is a schematic cross-sectional view in the axial direction of an angular ball bearing which is an embodiment of the rolling bearing of the present invention.

このアンギュラ玉軸受（以下、単に玉軸受という）は、外輪１と、内輪２と、複数の転動体としての複数の玉３と、保持器４とを備える。   This angular ball bearing (hereinafter simply referred to as a ball bearing) includes an outer ring 1, an inner ring 2, a plurality of balls 3 as a plurality of rolling elements, and a cage 4.

上記外輪１は、工作機械のハウジング（図示せず）の内周面に内嵌されている。上記外輪１は、その内周面の軸方向の中央部に軌道面である軌道溝を有している。一方、上記内輪２は、工作機械の主軸（図示せず）の外周面に外嵌されており、上記主軸の回転に伴って回転するようになっている（主軸と同期回転するようになっている）。上記内輪２は、その外周面の軸方向の略中央に軌道面である軌道溝を有している。上記複数の玉３は、内輪２の軌道溝と、外輪１の軌道溝との間に、保持器４によって保持された状態で、互いに周方向に間隔をおいて配置されている。この玉軸受は、周知の方法（説明は省略）で、軸方向の外方の一方の側から他方の側に、外輪１と内輪２との間に向けて、オイルエアＡが供給されるようになっている。   The outer ring 1 is fitted on the inner peripheral surface of a housing (not shown) of the machine tool. The outer ring 1 has a raceway groove that is a raceway surface in the center portion in the axial direction of the inner peripheral surface thereof. On the other hand, the inner ring 2 is fitted on the outer peripheral surface of a main shaft (not shown) of a machine tool, and rotates with the rotation of the main shaft (synchronously rotates with the main shaft). ) The inner ring 2 has a raceway groove that is a raceway surface at a substantially center of the outer peripheral surface in the axial direction. The plurality of balls 3 are disposed between the raceway groove of the inner ring 2 and the raceway groove of the outer ring 1 while being held by the cage 4 and spaced apart from each other in the circumferential direction. In this ball bearing, oil air A is supplied from the outer side in the axial direction to the other side by a known method (explanation is omitted) between the outer ring 1 and the inner ring 2. It has become.

上記保持器４は、第１環状部１１と、第２環状部１２と、複数の柱部（図示せう）とを有し、上記複数の柱部は、第１環状部１１と、第２環状部１２とを連結している。上記複数の柱部は、第１環状部１１の周方向に互いに間隔をおいて位置している。上記第１環状部１１の外周面は、外輪１の内周面に案内されている。   The cage 4 includes a first annular portion 11, a second annular portion 12, and a plurality of pillar portions (not shown), and the plurality of pillar portions include the first annular portion 11 and the second annular portion. The annular portion 12 is connected. The plurality of column portions are located at intervals in the circumferential direction of the first annular portion 11. The outer peripheral surface of the first annular portion 11 is guided by the inner peripheral surface of the outer ring 1.

上記第１環状部１１は、オイルエアの流れにおいて第２環状部１２よりも上流側に位置している。上記第１環状部１１は、凹部の一例としての環状溝１５と、複数の通路１６とを有している。上記環状溝１５は、第１環状部１１の軸方向の外方の端面に形成されている。上記環状溝１５は、軸方向の断面において断面略矩形の形状を有している。上記環状溝１５は、軸方向の外方に開口している。   The first annular portion 11 is located upstream of the second annular portion 12 in the flow of oil air. The first annular portion 11 has an annular groove 15 as an example of a recess and a plurality of passages 16. The annular groove 15 is formed on the outer end surface of the first annular portion 11 in the axial direction. The annular groove 15 has a substantially rectangular shape in cross section in the axial direction. The annular groove 15 opens outward in the axial direction.

上記各通路１６は、略第１環状部１１の径方向に延在している。上記各通路１６は、環状溝１５と、第１環状部１１の外周面との間を連通している。上記複数の通路１６は、第１環状部１１の周方向に略同一の間隔で離間されて配置されている。上記各通路１６は、延在方向の断面において断面略円形の形状を有している。   Each of the passages 16 extends substantially in the radial direction of the first annular portion 11. Each passage 16 communicates between the annular groove 15 and the outer peripheral surface of the first annular portion 11. The plurality of passages 16 are spaced apart at substantially the same interval in the circumferential direction of the first annular portion 11. Each of the passages 16 has a substantially circular shape in cross section in the extending direction.

上記実施形態の玉軸受によれば、第１環状部１１の軸方向の外方の端面が軸方向の外方側に開口する環状溝１５を有しているから、外輪１と内輪２との間に向けて、軸方向の外方から軸方向に供給されるオイルエアを、環状溝１５に円滑に導くことができる。また、上記環状溝１５に浸入したオイルエアを、環状溝１５よりもオイルエアの流れにおいて下流側に位置する複数の通路１６を介して、外輪１に案内される第１環状部１１の外周面に円滑に供給できる。したがって、上記外輪１と内輪２との間に向けて、軸方向の外方から軸方向に供給されるオイルエアを、従来よりも、より多くかつより円滑に、上記第１環状部１１の外周面に供給でき、上記第１環状部１１の外周面の焼付きの可能性を格段に小さくすることができる。   According to the ball bearing of the above embodiment, the outer end surface in the axial direction of the first annular portion 11 has the annular groove 15 that opens to the outer side in the axial direction. In the meantime, the oil air supplied in the axial direction from the outside in the axial direction can be smoothly guided to the annular groove 15. Also, the oil air that has entered the annular groove 15 is smoothly applied to the outer peripheral surface of the first annular portion 11 that is guided to the outer ring 1 via a plurality of passages 16 that are located downstream of the annular groove 15 in the flow of oil air. Can supply. Therefore, the outer peripheral surface of the first annular portion 11 is more smoothly and smoothly supplied with oil air from the outside in the axial direction toward the space between the outer ring 1 and the inner ring 2 than in the prior art. The possibility of seizure of the outer peripheral surface of the first annular portion 11 can be significantly reduced.

また、オイルエアを、外輪１に案内される保持器４の第１環状部１１の外周面へ効率良く供給することができるから、オイルエアの量を低減することができる。したがって、環境の保全に寄与することができる。   Moreover, since oil air can be efficiently supplied to the outer peripheral surface of the first annular portion 11 of the retainer 4 guided by the outer ring 1, the amount of oil air can be reduced. Therefore, it can contribute to environmental conservation.

また、上記実施形態の玉軸受によれば、第１環状部１１が、環状溝１５と、複数の通路１６を有し、各通路１６が、略径方向に延在し、複数の通路１６が、周方向に略等間隔に配置されているから、各通路１６から吹き出すオイルエアの流れの方向が径方向になり、かつ、複数の通路１６から吹き出すオイルエアの量が、周方向において略均等になる。したがって、上記保持器４の挙動を安定させることができて、保持器４のオイルエアの攪拌抵抗を低減できて、トルクを低減できる。   Moreover, according to the ball bearing of the said embodiment, the 1st annular part 11 has the annular groove 15 and the some channel | path 16, each channel | path 16 is extended in a substantially radial direction, and the some channel | path 16 is formed. Since the circumferential direction is arranged at substantially equal intervals, the flow direction of the oil air blown out from each passage 16 is the radial direction, and the amount of the oil air blown out from the plurality of passages 16 is substantially uniform in the circumferential direction. . Therefore, the behavior of the cage 4 can be stabilized, the oil / air stirring resistance of the cage 4 can be reduced, and the torque can be reduced.

尚、上記実施形態の玉軸受では、第１環状部１１の軸方向の外方の端面に形成された凹部が、環状溝１５であったが、この発明では、環状部の軸方向の外方の端面に形成される凹部は、環状の形状でなくても良い。   In the ball bearing of the above embodiment, the concave portion formed on the outer end surface in the axial direction of the first annular portion 11 is the annular groove 15. The concave portion formed on the end face of this may not have an annular shape.

また、上記実施形態の玉軸受では、凹部の一例としての環状溝１５と、第１環状部１１の外周面とを連通する各通路１６が、略径方向に延在していたが、この発明では、環状部の凹部と環状部の外周面とを連通する各通路は、略径方向に延在していなくても良く、環状部の軸方向の端面に形成された凹部と環状部の外周面とを連通してさえいれば、如何なる形状および如何なる方向に延在していても良い（例えば、曲線であっても良い）。   Moreover, in the ball bearing of the said embodiment, although each channel | path 16 which connects the annular groove 15 as an example of a recessed part and the outer peripheral surface of the 1st annular part 11 extended in the substantially radial direction, this invention Then, each passage that communicates the concave portion of the annular portion and the outer peripheral surface of the annular portion may not extend substantially in the radial direction, and the outer periphery of the concave portion formed on the axial end surface of the annular portion and the annular portion. As long as it communicates with the surface, it may extend in any shape and in any direction (for example, it may be a curved line).

また、上記実施形態の玉軸受では、複数の通路１６は、第１環状部１１の周方向に略同一の間隔で離間されて配置されていたが、この発明では、複数の通路は、周方向に略同一の間隔でない間隔で、互いに間隔をおいて配置されていても良い。また、この発明では、環状部に、凹部と環状部の外周面とを連通する通路を、一つのみ形成しても良い。   Further, in the ball bearing of the above embodiment, the plurality of passages 16 are arranged at substantially the same interval in the circumferential direction of the first annular portion 11, but in the present invention, the plurality of passages are arranged in the circumferential direction. They may be arranged at intervals other than substantially the same interval. Moreover, in this invention, you may form only one channel | path which connects a recessed part and the outer peripheral surface of an annular part in an annular part.

また、上記実施形態の玉軸受では、保持器４が、環状部１１,１２を二つ有し、二つの保持器１１,１２のうちで、オイルエアの導入側に配置されている第１環状部１１のみに、凹部である環状部１５と、通路１６とを形成したが、この発明では、保持器が、環状部を一つしか有さない所謂冠型保持器であって、冠型保持器の唯一の環状部に凹部および通路を形成する構成であっても良い。   Moreover, in the ball bearing of the said embodiment, the holder | retainer 4 has two cyclic | annular parts 11 and 12, and the 1st cyclic | annular part arrange | positioned among the two cage | baskets 11 and 12 at the oil air introduction | transduction side. 11, the annular portion 15 that is a concave portion and the passage 16 are formed. However, in the present invention, the cage is a so-called crown-shaped cage having only one annular portion, and the crown-shaped cage is provided. A configuration in which a concave portion and a passage are formed in the only annular portion may be employed.

また、上記実施形態の玉軸受では、保持器４が環状部１１,１２を二つ有し、その一方の環状部１１のみに環状溝１５および通路１６を形成したが、この発明の転がり軸受は、オイルエアが軸方向の両側から軸方向の内側に導入される構成であって、保持器が二つの環状部を有し、その二つの環状部の夫々に、凹部および通路を形成しても良い。また、上記実施形態では、転動体が、玉３であったが、この発明では、転動体は、円筒ころ、円錐ころまたは凸面ころ等の玉以外の転動体であっても良い。   Further, in the ball bearing of the above embodiment, the cage 4 has two annular portions 11 and 12, and the annular groove 15 and the passage 16 are formed only in one annular portion 11, but the rolling bearing of the present invention is The oil air may be introduced into the axial direction from both sides in the axial direction, and the cage may have two annular portions, and a recess and a passage may be formed in each of the two annular portions. . Moreover, in the said embodiment, although the rolling element was the ball 3, in this invention, rolling elements other than balls, such as a cylindrical roller, a tapered roller, or a convex roller, may be sufficient.

図２は、本発明の転がり軸受のそのような実施形態である円筒ころ軸受の軸方向の模式断面図である。   FIG. 2 is a schematic cross-sectional view in the axial direction of a cylindrical roller bearing which is such an embodiment of the rolling bearing of the present invention.

この円筒ころ軸受は、外輪１０１、内輪１０２、複数の円筒ころ１０３および保持器１０４を備え、複数の円筒ころ１０３は、外輪１０１と内輪１０２との間に、保持器１０４で保持された状態で、互いに間隔をおいて配置されている。   The cylindrical roller bearing includes an outer ring 101, an inner ring 102, a plurality of cylindrical rollers 103, and a cage 104, and the plurality of cylindrical rollers 103 are held by the cage 104 between the outer ring 101 and the inner ring 102. Are spaced apart from each other.

上記保持器１０４は、円筒ころ軸受の軸方向の二等分面に対して、略対称に位置している。また、上記保持器１０４は、図１に１１で示す第１環状部１１と同一の構造を有する第１環状部１１１および第２環状部１１２を有すると共に、第１環状部１１１と第２環状部１１２とを連結する複数の柱部を有している。   The cage 104 is positioned substantially symmetrically with respect to the bisecting surface in the axial direction of the cylindrical roller bearing. The retainer 104 has a first annular portion 111 and a second annular portion 112 having the same structure as the first annular portion 11 shown in FIG. 1 at 11, and the first annular portion 111 and the second annular portion. 112 has a plurality of pillars that connect 112.

この円筒ころ軸受には、オイルエアが軸方向の両側から軸方向の内側に導入されるようになっている。すなわち、軸方向の一方の側の軸方向の外部からオイルエアＢが、また、軸方向の他方の側の軸方向の外部からオイルエアＣが、外輪１０１と内輪１０２との間に向けて導入されるようになっている。   In this cylindrical roller bearing, oil air is introduced into the inside in the axial direction from both sides in the axial direction. That is, oil air B is introduced from the outside in the axial direction on one side in the axial direction, and oil air C is introduced from the outside in the axial direction on the other side in the axial direction between the outer ring 101 and the inner ring 102. It is like that.

この実施形態のように、保持器の二つの環状部の夫々に、凹部および通路を形成しておくと、オイルエアが、軸方向の一方の側のみから導入される環境に配置される場合においては、転がり軸受の軸方向のどちらの側を、オイルエア導入側に向けても良く、転がり軸受の設置の自由度を２倍にすることができる。   As in this embodiment, if a recess and a passage are formed in each of the two annular portions of the cage, in the case where the oil / air is arranged in an environment introduced from only one side in the axial direction, Either side of the rolling bearing in the axial direction may be directed to the oil / air introduction side, and the degree of freedom of installation of the rolling bearing can be doubled.

また、オイルエアが、軸方向の両方の側から導入される環境に配置される場合においては、外輪に案内される、保持器の二つの環状部の外周面の両方の焼付きを防止できると共に、上記二つの環状部の外周面の両方の挙動を安定させることができて、トルクを大きく低減することができる。   Moreover, in the case where the oil air is arranged in an environment introduced from both sides in the axial direction, it is possible to prevent seizure of both outer peripheral surfaces of the two annular portions of the cage guided by the outer ring, The behavior of both outer peripheral surfaces of the two annular portions can be stabilized, and the torque can be greatly reduced.

尚、この実施形態では、第１環状部１１１と、第２環状部１１２とが、略同一であった。しかしながら、この発明の転がり軸受において、保持器が二つの環状部を有していて、二つの環状部の夫々が、凹部および通路を有している場合において、二つの環状部は、同一でなくても良い。例えば、二つの環状部において、凹部および通路の少なくとも一方の構造が異なっていても良い。また、二つの環状部において、大きさが異なっていても良く、凹部および通路以外の形状および構造が異なっていても良い。   In this embodiment, the first annular portion 111 and the second annular portion 112 are substantially the same. However, in the rolling bearing according to the present invention, when the cage has two annular portions, and each of the two annular portions has a recess and a passage, the two annular portions are not the same. May be. For example, in the two annular portions, the structure of at least one of the recess and the passage may be different. Further, the two annular portions may have different sizes, and may have different shapes and structures other than the recesses and the passages.

本発明の転がり軸受の一実施形態であるアンギュラ玉軸受の軸方向の模式断面図である。It is a schematic cross section of the axial direction of the angular ball bearing which is one Embodiment of the rolling bearing of this invention. 本発明の転がり軸受の他の実施形態である円筒ころ軸受の軸方向の模式断面図である。It is a schematic cross section of the axial direction of the cylindrical roller bearing which is other embodiment of the rolling bearing of this invention.

符号の説明Explanation of symbols

１,１０１ 外輪
２,１０１ 内輪
３ 玉
４,１０４ 保持器
１１,１１１ 第１環状部
１２,１１２ 第２環状部
１５ 環状溝
１６ 通路
１０３ 円筒ころ
Ａ,Ｂ,Ｃ オイルエア DESCRIPTION OF SYMBOLS 1,101 Outer ring 2,101 Inner ring 3 Ball 4,104 Cage 11,111 First annular part 12,112 Second annular part 15 Annular groove 16 Passage 103 Cylindrical roller A, B, C Oil air

Claims (2)

軌道面を内周面に有する外輪と、
軌道面を外周面に有する内輪と、
上記外輪の軌道面と、上記内輪の軌道面との間に配置された複数の転動体と、
上記複数の転動体を保持する保持器と
を備え、
上記保持器は、上記外輪の上記内周面に案内される外周面を有する環状部を有し、
上記環状部は、
上記環状部の軸方向の外方側の端面に位置して上記軸方向の外方に開口する凹部と、
上記凹部と上記環状部の上記外周面とを連通する一以上の通路と
を有することを特徴とする転がり軸受。 An outer ring having a raceway surface on the inner peripheral surface;
An inner ring having a raceway surface on the outer peripheral surface;
A plurality of rolling elements disposed between the raceway surface of the outer ring and the raceway surface of the inner ring;
A cage for holding the plurality of rolling elements,
The cage has an annular portion having an outer peripheral surface guided by the inner peripheral surface of the outer ring,
The annular part is
A concave portion that is located on the outer end surface in the axial direction of the annular portion and opens outward in the axial direction;
A rolling bearing comprising: one or more passages communicating the recess and the outer peripheral surface of the annular portion. 請求項１に記載の転がり軸受において、
上記凹部は、環状溝であり、
上記環状部は、複数の上記通路を有し、
上記各通路は、略上記環状部の径方向に延在し、
上記複数の通路は、上記環状部の周方向に略等間隔に配置されていることを特徴とする転がり軸受。 The rolling bearing according to claim 1,
The recess is an annular groove;
The annular portion has a plurality of the passages,
Each of the passages extends substantially in the radial direction of the annular portion,
The rolling bearing according to claim 1, wherein the plurality of passages are arranged at substantially equal intervals in a circumferential direction of the annular portion.
JP2008218361A 2008-08-27 2008-08-27 Rolling bearing Pending JP2010053930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008218361A JP2010053930A (en) 2008-08-27 2008-08-27 Rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008218361A JP2010053930A (en) 2008-08-27 2008-08-27 Rolling bearing

Publications (1)

Publication Number Publication Date
JP2010053930A true JP2010053930A (en) 2010-03-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008218361A Pending JP2010053930A (en) 2008-08-27 2008-08-27 Rolling bearing

Country Status (1)

Country Link
JP (1) JP2010053930A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160333A (en) * 2012-02-07 2013-08-19 Jtekt Corp Bearing resin retainer, method for manufacturing the same, and rolling bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160333A (en) * 2012-02-07 2013-08-19 Jtekt Corp Bearing resin retainer, method for manufacturing the same, and rolling bearing

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