JP2006194406A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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JP2006194406A
JP2006194406A JP2005009036A JP2005009036A JP2006194406A JP 2006194406 A JP2006194406 A JP 2006194406A JP 2005009036 A JP2005009036 A JP 2005009036A JP 2005009036 A JP2005009036 A JP 2005009036A JP 2006194406 A JP2006194406 A JP 2006194406A
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rolling bearing
tank
nozzle
lubricating oil
oil
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JP4525911B2 (en
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Kazuya Suzuki
数也 鈴木
Kiyoshi Tanimoto
清 谷本
Hiroshi Ueno
弘 上野
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JTEKT Corp
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JTEKT Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device with a lubricating function capable of increasing the capacity of a tank compared with this type conventional rolling bearing device and reducing cost, in the rolling bearing device having the function for directly supplying lubricating oil to inside of a bearing by inserting a nozzle into an annular space between an inner ring and an outer ring of the rolling bearing. <P>SOLUTION: This rolling bearing device is provided with the nozzle 22 communicated with the tank 21 storing lubricating oil and opened within the annular space between the inner ring 11 and the outer ring 12 of the rolling bearing to directly supply lubricating oil to inside of the bearing. The rolling bearing device is further provided with a means for restricting outflow of lubricating oil inside the tank 21 via the nozzle 22 (for example, an oil-containing member 25 inside the tank 21), and is constituted so as to supply the lubricating oil inside the tank 21 via the nozzle 22 by negative pressure generated inside the bearing at the time of rotation of the rolling bearing. Due to this structure, the necessity of a pump for supplying lubricating oil and its drive circuit is eliminated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は自己潤滑機能を備えた転がり軸受装置に関する。   The present invention relates to a rolling bearing device having a self-lubricating function.

例えば工作機械等に用いられる各種スピンドル等、比較的高速度で回転する軸の支持にはアンギュラ玉軸受などの転がり軸受が用いられる。このような高速回転軸を支持する転がり軸受に対する潤滑方法としては、従来、主としてオイルエア潤滑方式が多用されている。   For example, rolling bearings such as angular ball bearings are used to support shafts that rotate at a relatively high speed, such as various spindles used in machine tools and the like. As a lubricating method for such a rolling bearing that supports a high-speed rotating shaft, an oil-air lubrication method has been frequently used conventionally.

オイルエア潤滑方式は、間欠的に供給される微量の潤滑油を配管を通じて圧縮空気により転がり軸受に向けて吹きつける方式であり、高速で回転する転がり軸受の回りに形成されるエアカーテンを突き破って潤滑油を軸受に供給するために、圧縮エアが言わばキャリアとして用いられる。   The oil-air lubrication system is a system in which a small amount of intermittently supplied lubricating oil is blown toward the rolling bearings with compressed air through piping, and lubricates by breaking through the air curtain formed around the rolling bearings rotating at high speed. In order to supply oil to the bearings, compressed air is used as a carrier, so to speak.

このようなオイルエア潤滑方式においては、潤滑対象とする転がり軸受が組み込まれているスピンドル等の外部にオイルエア潤滑装置やミキシングバルブ、更にはコンプレッサ並びに外部配管が必要なほか、スピンドル等の内部にもオイルエア用の通路を形成する必要があってコストが高くなるばかりでなく、圧縮エアを用いるが故に騒音レベルが高くなるという問題もある。   In such an oil / air lubrication system, an oil / air lubrication device, a mixing valve, a compressor and external piping are required outside the spindle in which the rolling bearing to be lubricated is incorporated. There is a problem that not only the cost is increased due to the need to form a passage for the vehicle, but also the noise level is increased due to the use of compressed air.

このような問題を解決するために、転がり軸受内部に潤滑油供給機構を内蔵させてなる転がり軸受装置が提案されている（例えば特許文献１参照）。   In order to solve such a problem, a rolling bearing device in which a lubricating oil supply mechanism is built in the rolling bearing has been proposed (see, for example, Patent Document 1).

この特許文献１に記載の技術においては、図６にその軸平行断面図を示すように、内輪６１および外輪６２および転動体６３を主たる構成要件とする転がり軸受の固定輪、例えば外輪６２に固定されるシール６４に、潤滑油を貯留するタンク６５と、そのタンク６５内の潤滑油を吸引して吐出するポンプ６６、そのポンプ６６の吐出口に取り付けられて、内輪６１と外輪６２の間の環状空間内の転動体６３の近傍にまで伸びて開口するノズル６７、およびポンプ６６の電源電池を含む駆動回路（図示せず）からなる給油ユニットを固定した構造とし、ノズル６７の先端から例えば数十ｎｌ／ｍｉｎ（数十μｃｃ／ｍｉｎ）程度の極微量の潤滑油を、転がり軸受の回転時に形成されるエアカーテンの内側に供給する。   In the technique described in Patent Document 1, as shown in FIG. 6, an axial parallel sectional view, the inner ring 61, the outer ring 62, and the rolling element 63 are mainly fixed to a fixed ring of a rolling bearing, for example, the outer ring 62. A seal 65 is attached to a tank 65 for storing lubricating oil, a pump 66 for sucking and discharging the lubricating oil in the tank 65, and a discharge port of the pump 66. A nozzle 67 that extends to the vicinity of the rolling element 63 in the annular space and an oil supply unit that includes a drive circuit (not shown) including a power supply battery of the pump 66 is fixed. A very small amount of lubricating oil of about 10 nl / min (several tens of μcc / min) is supplied to the inside of the air curtain formed when the rolling bearing rotates.

この提案によれば、潤滑油は転がり軸受の回転時に生じるエアカーテンの内側に供給されるために、オイルエア潤滑方式のようにキャリアとしての圧縮エアが不要となって騒音の問題を解消することができるとともに、コンプレッサやオイルエア潤滑装置、更には外部配管および内部配管も不要となって、コスト的にも有利となる。
特開２００４−１０８３８８号公報 According to this proposal, since the lubricating oil is supplied to the inside of the air curtain generated when the rolling bearing rotates, the compressed air as a carrier is not required as in the oil-air lubrication method, and the problem of noise can be solved. In addition, a compressor, an oil / air lubrication device, and an external pipe and an internal pipe are not necessary, which is advantageous in terms of cost.
JP 2004-108388 A

ところで、以上の提案技術においては、転がり軸受内の狭い空間にタンク６５のほかにポンプ６６およびその電源電池を含む駆動部が必要となり、タンク６５の容量が小さくなってしまうという問題がある。また、ポンプ６６およびその電源電池を含む駆動回路のコストも高いという問題もある。   By the way, in the above proposed technology, there is a problem that the drive unit including the pump 66 and its power supply battery is required in addition to the tank 65 in a narrow space in the rolling bearing, and the capacity of the tank 65 is reduced. There is also a problem that the cost of the drive circuit including the pump 66 and its power supply battery is high.

本発明はこのような実情に鑑みてなされたもので、給油ユニットを収容するスペースが上記した従来の提案技術と同等であっても、そのタンクの容量を大きくすることができ、かつ、給油ユニットとしてのコストを低減することのできる潤滑機能付きの転がり軸受装置の提供をその課題としている。   The present invention has been made in view of such circumstances, and even if the space for accommodating the oil supply unit is equivalent to the above-described conventional proposed technology, the capacity of the tank can be increased, and the oil supply unit An object of the present invention is to provide a rolling bearing device with a lubrication function that can reduce the cost of the above.

上記の課題を解決するため、本発明の転がり軸受装置は、内輪と外輪の間に、複数の転動体が転動自在に配置されてなる転がり軸受と、その転がり軸受の内輪と外輪の間に形成される環状空間内に入り込んで開口するノズルと、そのノズルに連通し、内部に潤滑油を貯留するタンクを備え、そのタンク内の潤滑油を上記ノズルを介して上記環状空間内に供給する給油ユニットを備えた転がり軸受装置において、上記タンク内の潤滑油が上記ノズルを介して流出することを制限する流出制限手段を備えるとともに、そのタンク内の潤滑油を上記ノズルに向けて供給するポンプを有さず、当該タンク内の潤滑油は、上記転がり軸受の回転によって上記環状空間内に生じる負圧で吸引されることにより上記ノズルを介して当該環状空間内に供給されるように構成されていることによって特徴づけられる（請求項１）。   In order to solve the above-described problems, a rolling bearing device according to the present invention includes a rolling bearing in which a plurality of rolling elements are rotatably disposed between an inner ring and an outer ring, and an inner ring and an outer ring of the rolling bearing. A nozzle that enters and opens into the formed annular space, and a tank that communicates with the nozzle and stores lubricating oil therein, and supplies the lubricating oil in the tank to the annular space through the nozzle. In the rolling bearing device including the oil supply unit, the pump includes outflow restriction means for restricting the lubricating oil in the tank from flowing out through the nozzle, and supplies the lubricating oil in the tank toward the nozzle. The lubricating oil in the tank is supplied to the annular space through the nozzle by being sucked by the negative pressure generated in the annular space by the rotation of the rolling bearing. It characterized by being configured to (claim 1).

ここで、本発明においては、上記タンク内に含油部材が充填され、この含油部材が上記流出制限手段として機能するように構成されている構成（請求項２）を好適に採用することができ、その含油部材としては、スポンジ（請求項３）、あるいはフェルト（請求項４）を好適に採用することができる。   Here, in the present invention, an oil-impregnated member is filled in the tank, and a configuration (claim 2) configured so that the oil-containing member functions as the outflow restricting means can be suitably employed. As the oil-containing member, a sponge (Claim 3) or felt (Claim 4) can be preferably used.

また、本発明においては、上記流出制限手段として、上記タンクとノズルの間に介在するオリフィスとする構成（請求項５）も採用することができる。   In the present invention, as the outflow restricting means, it is also possible to adopt a configuration (claim 5) which is an orifice interposed between the tank and the nozzle.

本発明は、転がり軸受を回転させたときに、軸受内部で生じる気流に起因して発生する負圧を利用し、その負圧によってタンク内の潤滑油を吸引させてノズルの先端開口部から供給することにより、潤滑油供給のためのポンプを不要とし、課題を解決しようとするものである。   The present invention utilizes a negative pressure generated due to an air flow generated inside the bearing when the rolling bearing is rotated, and the lubricating oil in the tank is sucked by the negative pressure and supplied from the tip opening of the nozzle. By doing so, a pump for supplying lubricating oil is unnecessary, and the problem is to be solved.

すなわち、転がり軸受を回転させると、その内部、つまり内輪と外輪の間の環状空間に空気の流れが形成される。この空気の流れにより、その環状空間内に挿入されているノズルの開口部には負圧が生じ、この負圧により、ノズルを介してタンク内の潤滑油が吸引され、ノズルの開口部から転がり軸受内部に潤滑油を供給することができる。本発明においては、この負圧によるタンク内の潤滑油の吸引供給量が過多とならないように、タンク内の潤滑油の流出制限手段を設けている。   That is, when the rolling bearing is rotated, an air flow is formed in the annular space between the inner ring and the outer ring. Due to this air flow, negative pressure is generated in the opening of the nozzle inserted in the annular space, and this negative pressure causes the lubricating oil in the tank to be sucked through the nozzle and rolls from the opening of the nozzle. Lubricating oil can be supplied inside the bearing. In the present invention, means for limiting the outflow of lubricating oil in the tank is provided so that the suction amount of lubricating oil in the tank due to the negative pressure does not become excessive.

流出制限手段としては、請求項２に係る発明のように、含油部材をタンク内に充填し、その含油部材に潤滑油を浸透させて保持する構成を採用することができ、その含油部材としてはスポンジ（請求項３）あるいはフェルト（請求項４）を好適に採用することができ、あるいは、タンクとノズルの開口部の間にオリフィスを介在させる構成（請求項５）も採用することができる。   As the outflow restricting means, as in the invention according to claim 2, it is possible to adopt a configuration in which the oil-containing member is filled in the tank and the oil-impregnated member is infiltrated and held by the oil-impregnated member. Sponge (Claim 3) or felt (Claim 4) can be suitably employed, or a configuration in which an orifice is interposed between the tank and the nozzle opening (Claim 5) can also be employed.

転がり軸受内部の気流に起因する負圧によりタンク内の潤滑油を吸引して、ノズルを介して転がり軸受内部に供給する本発明の供給方式によると、負圧の大きさに比例して転がり軸受内部に供給される潤滑油量が変化することになるが、負圧は転がり軸受の回転速度に比例して大きくなるため、比較的低い回転速度時には少ない潤滑油が、高い回転速度時には多い潤滑油が転がり軸受内部に供給されることになり、転がり軸受の回転速度に応じて必要とする潤滑油量が自律的に供給される結果となる。   According to the supply system of the present invention, the lubricating oil in the tank is sucked by the negative pressure caused by the air flow inside the rolling bearing and is supplied to the inside of the rolling bearing through the nozzle. According to the supply system of the present invention, the rolling bearing is proportional to the magnitude of the negative pressure. Although the amount of lubricating oil supplied inside will change, the negative pressure increases in proportion to the rotational speed of the rolling bearing, so that less lubricating oil is present at relatively low rotational speeds and more lubricating oil at high rotational speeds. Is supplied to the inside of the rolling bearing, and the result is that the required amount of lubricating oil is autonomously supplied according to the rotational speed of the rolling bearing.

本発明によれば、内輪と外輪の間の環状空間内に、潤滑油を貯留するタンクに連通するノズルを挿入して、転がり軸受内部に潤滑油を直接的に供給する自己潤滑機能を持つ転がり軸受装置において、転がり軸受の回転時にその内部で発生する負圧によってタンク内の潤滑油を吸引してノズル先端から転がり軸受内部に供給するので、従来のこの種の転がり軸受装置のように潤滑油供給のためのポンプが不要となる結果、その分のコストを低減することができると同時に、潤滑油供給のための動力が不要となって省エネを達成することもできる。   According to the present invention, in a ring space between the inner ring and the outer ring, a nozzle communicating with a tank for storing lubricating oil is inserted, and the rolling having a self-lubricating function for directly supplying the lubricating oil into the rolling bearing. In a bearing device, the lubricating oil in the tank is sucked and supplied from the tip of the nozzle to the inside of the rolling bearing by the negative pressure generated inside when the rolling bearing rotates, so that the lubricating oil is different from the conventional rolling bearing device of this type. As a result of the fact that a pump for supply is not required, the cost can be reduced, and at the same time, power for supplying the lubricant is not required and energy saving can be achieved.

また、給油ユニットを転がり軸受内部もしくは転がり軸受に隣接する間座などに組み込む場合には、ポンプ並びにその電源電池を含む駆動回路を含めたスペースをタンクに置き換えることが可能となり、その分タンクの容量を増大させることができる。このことは、タンク内の潤滑油を補充できないタイプのものにあってはその寿命を向上させることができ、また、タンク内の潤滑油を補充できるものにあってはその補充インターバルを長くすることができるという効果に繋がる。   In addition, when a lubrication unit is installed in a rolling bearing or in a spacer adjacent to the rolling bearing, the space including the pump and the drive circuit including its power supply battery can be replaced with a tank. Can be increased. This can improve the life of the type that cannot replenish the lubricating oil in the tank, and lengthen the replenishment interval of the type that can replenish the lubricating oil in the tank. This leads to the effect of being able to

以下、図面を参照しつつ本発明の実施の形態について説明する。
図１は本発明をアンギュラ玉軸受に適用した実施の形態の軸平行断面図であり、図２はその右側面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an axial parallel sectional view of an embodiment in which the present invention is applied to an angular ball bearing, and FIG. 2 is a right side view thereof.

アンギュラ玉軸受１は、内輪１１と外輪１２の間に、複数の転動体（ボール）１３を保持器１４により周方向に一定の間隔で保持した状態で転動自在に配置してなる公知の構造を備えたものであるが、この例においては、内輪１１および外輪１２は通常のアンギュラ玉軸受に比して軸方向一端面側に互いに同じ寸法だけ長くなっており、その内輪１１および外輪１２の延長部分において、これらの間に形成されている環状空間内に給油ユニット２が組み込まれている。   The angular ball bearing 1 has a known structure in which a plurality of rolling elements (balls) 13 are arranged between an inner ring 11 and an outer ring 12 so as to be freely rollable in a state where they are held by a retainer 14 at regular intervals in the circumferential direction. However, in this example, the inner ring 11 and the outer ring 12 are longer by the same dimension on the one end surface side in the axial direction than the normal angular ball bearing, and the inner ring 11 and the outer ring 12 are In the extended portion, the oil supply unit 2 is incorporated in an annular space formed between them.

給油ユニット２は、潤滑油を貯留するタンク２１と、そのタンク２１に連通してその先端が保持器１４の端面を越えて転動体１３の近傍にまで至り、保持器１４の内周面と内輪１１の外周面との間で開口するノズル２２と、タンク２１とノズル２２とを連通させるための管２３ａ，２３ｂと、ノズル２２を保持し、かつ、管２３ａ，２３ｂとノズル２２との連結（配管）部材、例えばティー継手等、を収容するノズル保持部材２４によって構成されている。これらの各構成部材は、固定輪である外輪１２の内周面に固定されている。   The oil supply unit 2 includes a tank 21 for storing lubricating oil, a tank 21 that communicates with the tank 21, and a tip of the tank 21 extends beyond the end surface of the cage 14 to the vicinity of the rolling element 13. 11, the nozzle 22 that opens between the outer peripheral surface, the pipes 23 a and 23 b for communicating the tank 21 and the nozzle 22, the nozzle 22, and the connection between the pipes 23 a and 23 b and the nozzle 22 ( It is constituted by a nozzle holding member 24 that accommodates a (piping) member, such as a tee joint. Each of these constituent members is fixed to the inner peripheral surface of the outer ring 12 which is a fixed ring.

そして、上記したタンク２１の内部には、スポンジあるいはフェルト等からなる含油部材２５が充填されており、潤滑油はこの含油部材２５に吸収保持された状態でタンク２１内に貯留されている。   The tank 21 is filled with an oil-containing member 25 made of sponge or felt, and the lubricating oil is stored in the tank 21 while being absorbed and held by the oil-containing member 25.

以上の実施の形態において、タンク２１の潤滑油は含油部材２５に吸収されているために、アンギュラ玉軸受１が回転していない状態では外部に流出しないが、アンギュラ玉軸受１が回転すると、つまり内輪１１および転動体１３並びに保持器１４が外輪１２に対して回転すると、内輪１１と外輪１２の間の環状空間に空気流が発生し、その空気流によりノズル２２の先端開口部には負圧が作用する。この負圧の大きさが、含油部材２５による潤滑油の吸収保持力を越えたときに、タンク２１内の含油部材２５に吸収保持されている潤滑油が吸引されてノズル２２の先端開口部から供給され、転動体１３と内輪１１および外輪１２の間に行き渡り、これらの間を潤滑する。   In the above embodiment, since the lubricating oil in the tank 21 is absorbed by the oil-containing member 25, the angular ball bearing 1 does not flow to the outside in a state where the angular ball bearing 1 is not rotating. When the inner ring 11, the rolling element 13, and the cage 14 rotate with respect to the outer ring 12, an air flow is generated in the annular space between the inner ring 11 and the outer ring 12, and the negative pressure is applied to the tip opening of the nozzle 22 by the air flow. Act. When the magnitude of this negative pressure exceeds the absorption and holding force of the lubricating oil by the oil-containing member 25, the lubricating oil absorbed and held by the oil-containing member 25 in the tank 21 is sucked from the tip opening of the nozzle 22. Supplied and spreads between the rolling elements 13 and the inner ring 11 and the outer ring 12 and lubricates between them.

潤滑油のノズル２２からの供給量、つまりアンギュラ玉軸受に対する潤滑油の単位時間当たりの供給量は、アンギュラ玉軸受１の回転時に生じる負圧の大きさに略比例し、その負圧はアンギュラ玉軸受１の回転速度に略比例するので、結局、アンギュラ玉軸受１は、その回転速度に略比例した量の潤滑油が供給されることになる。   The supply amount of the lubricating oil from the nozzle 22, that is, the supply amount of the lubricating oil per unit time to the angular ball bearing, is approximately proportional to the magnitude of the negative pressure generated when the angular ball bearing 1 rotates, and the negative pressure is the angular ball. Since it is substantially proportional to the rotational speed of the bearing 1, the angular ball bearing 1 is eventually supplied with an amount of lubricating oil substantially proportional to the rotational speed.

以上の本発明の実施の形態において特に注目すべき点は、タンク２１内の潤滑油をノズル２２を介してアンギュラ玉軸受１に対して供給するためのポンプ並びにその駆動回路が不要な点であり、これにより、この実施の形態のように転がり軸受内に給油ユニット２の全体を組み込む場合には、ポンプ並びにその駆動回路が不要な分だけタンク２１の容量を大きくすることができ、より多くの潤滑油を貯留することができると同時に、コストの低減を達成することができる。しかも、アンギュラ玉軸受１に対する潤滑油の供給量はその回転速度に略比例することになり、特に制御回路等を設けることなく、回転速度に適応して自律的に供給潤滑油量が変化する。   In the above-described embodiment of the present invention, a point to be particularly noted is that a pump for supplying the lubricating oil in the tank 21 to the angular ball bearing 1 through the nozzle 22 and its drive circuit are unnecessary. Thus, when the entire oil supply unit 2 is incorporated in the rolling bearing as in this embodiment, the capacity of the tank 21 can be increased by an amount that does not require the pump and its drive circuit, and more Lubricating oil can be stored and at the same time a reduction in cost can be achieved. Moreover, the supply amount of the lubricating oil to the angular ball bearing 1 is substantially proportional to the rotational speed, and the supplied lubricating oil amount changes autonomously according to the rotational speed without providing a control circuit or the like.

ここで、以上の実施の形態においては、給油ユニット２のタンク２１とは別にノズル保持部材２４を設けて、ノズル２２を保持するとともに管２３ａ，２３ｂとノズル２２の連結のための配管部材を収容した例を示したが、このノズル保持部材２４については必ずしも必要ではなく、ノズル２２をタンク２１に固定してその基端部を当該タンク２１内の含油部材２５に直接連通させてもよい。この場合、図３に軸方向から見た図を例示するように、タンク２１はアンギュラ玉軸受１の内輪１１と外輪１２の間の環状空間内にその一周にわたって設けることができ、潤滑油の貯留量をより一層多くすることができる。
また、以上の実施の形態においては、アンギュラ玉軸受１に本発明を適用した例を示したが、アンギュラ玉軸受以外の軸受、例えば深溝玉軸受等にも本発明を適用し得ることは勿論である。 Here, in the above embodiment, the nozzle holding member 24 is provided separately from the tank 21 of the fuel supply unit 2 to hold the nozzle 22 and accommodate the piping member for connecting the pipes 23 a and 23 b and the nozzle 22. Although the nozzle holding member 24 is not necessarily required, the nozzle 22 may be fixed to the tank 21 and the base end thereof may be directly communicated with the oil retaining member 25 in the tank 21. In this case, as illustrated in FIG. 3 as viewed from the axial direction, the tank 21 can be provided over the entire circumference in the annular space between the inner ring 11 and the outer ring 12 of the angular ball bearing 1 to store lubricating oil. The amount can be further increased.
Moreover, in the above embodiment, although the example which applied this invention to the angular ball bearing 1 was shown, of course, this invention is applicable also to bearings other than an angular ball bearing, for example, a deep groove ball bearing etc. is there.

更に、以上の実施の形態においては、転がり軸受（アンギュラ玉軸受１）の内部に給油ユニット２を組み込んだ例を示したが、本発明はこれに限定されることなく、図４に軸平行断面図を示すように、転がり軸受の外部でその近傍に給油ユニットを配置してもよい。この図４の例では、汎用のアンギュラ玉軸受１０の内輪１０１および外輪１０２に隣接配置される間座３１，３２のうち、固定輪である外輪１０２用の間座３２の内周面に、図１の例と同等のタンク２１、ノズル２２、ノズル保持部材２４、および含油部材２５等からなる給油ユニット２を固定している。ノズル２２は、アンギュラ玉軸受１０の一端面側から内輪１０１と外輪１０２の間の環状空間に入り込み、その先端が図１の例と同等の位置において開口している。このような構成でも、先の例と全く同等の作用効果を奏することができる。   Furthermore, in the above embodiment, although the example which incorporated the oil supply unit 2 in the inside of the rolling bearing (angular ball bearing 1) was shown, this invention is not limited to this, FIG. As shown in the figure, an oil supply unit may be arranged near the outside of the rolling bearing. In the example of FIG. 4, among the spacers 31 and 32 arranged adjacent to the inner ring 101 and the outer ring 102 of the general-purpose angular contact ball bearing 10, The oil supply unit 2 including the tank 21, the nozzle 22, the nozzle holding member 24, the oil retaining member 25, and the like equivalent to the example 1 is fixed. The nozzle 22 enters the annular space between the inner ring 101 and the outer ring 102 from one end surface side of the angular ball bearing 10, and the tip thereof opens at a position equivalent to the example of FIG. 1. Even with such a configuration, it is possible to achieve the same effects as the previous example.

また、以上の各実施の形態では、タンク２１内にスポンジやフェルト等の含油部材２５を充填して、その含油部材２５によって、ノズル２２の先端にある程度以上の負圧が発生するまで潤滑油の流出を制限した例を示したが、潤滑油の流出を制限する手段として、含油部材２５に代えて、図５にその配管構成を概念的に示すように、オリフィス５等を用いて、タンク２１とノズル２２の開口部との間の適宜箇所を絞ってもよい。また、タンク２１には潤滑油の流出時に空気が入り込む空気孔が必要となるが、その空気孔に空気の流入制限機能持たせても、同等の作用効果を奏することができる。   Further, in each of the above-described embodiments, the oil-containing member 25 such as sponge or felt is filled in the tank 21, and the oil-containing member 25 causes the lubricating oil to be discharged until a certain level of negative pressure is generated at the tip of the nozzle 22. Although an example in which the outflow is restricted has been shown, as a means for restricting the outflow of lubricating oil, the tank 21 is replaced with an orifice 5 or the like as conceptually shown in FIG. And an appropriate portion between the opening of the nozzle 22 may be narrowed. The tank 21 needs an air hole into which air enters when the lubricating oil flows out. Even if the air hole has a function of restricting the inflow of air, the same effect can be obtained.

本発明をアンギュラ玉軸受に適用した実施の形態の軸平行断面図である。It is an axial parallel sectional view of an embodiment in which the present invention is applied to an angular ball bearing. 図１の右側面図である。It is a right view of FIG. 本発明の他の実施の形態の軸方向から見た図である。It is the figure seen from the axial direction of other embodiment of this invention. 本発明の更に他の実施の形態の軸平行断面図である。It is an axial parallel sectional view of further another embodiment of the present invention. 本発明の更にまた他の実施の形態におけるノズルとタンクとの間の配管構成を示す概念図である。It is a conceptual diagram which shows the piping structure between the nozzle and tank in other embodiment of this invention. 自己潤滑機能を備えた従来の転がり軸受装置の構成例を示す軸平行断面図である。It is an axial parallel sectional view showing a configuration example of a conventional rolling bearing device having a self-lubricating function.

符号の説明Explanation of symbols

１，１０ アンギュラ玉軸受
１１，１０１ 内輪
１２，１０２ 外輪
１３ 転動体
１４ 保持器
２ 給油ユニット
２１ タンク
２２ ノズル
２３ａ，２３ｂ 管
２４ ノズル保持部材
２５ 含油部材
３１，３２ 間座
５ オリフィス DESCRIPTION OF SYMBOLS 1,10 Angular contact ball bearing 11,101 Inner ring 12,102 Outer ring 13 Rolling element 14 Cage 2 Refueling unit 21 Tank 22 Nozzle 23a, 23b Pipe 24 Nozzle holding member 25 Oil impregnated member 31, 32 Spacer 5 Orifice

Claims (5)

内輪と外輪の間に、複数の転動体が転動自在に配置されてなる転がり軸受と、その転がり軸受の内輪と外輪の間に形成される環状空間内に入り込んで開口するノズルと、そのノズルに連通し、内部に潤滑油を貯留するタンクを備え、そのタンク内の潤滑油を上記ノズルを介して上記環状空間内に供給する給油ユニットを備えた転がり軸受装置において、
上記上記タンク内の潤滑油が上記ノズルを介して流出することを制限する流出制限手段を備えるとともに、そのタンク内の潤滑油を上記ノズルに向けて供給するポンプを有さず、当該タンク内の潤滑油は、上記転がり軸受の回転によって上記環状空間内に生じる負圧で吸引されることにより上記ノズルを介して当該環状空間内に供給されるように構成されていることを特徴とする転がり軸受装置。 A rolling bearing in which a plurality of rolling elements are rotatably arranged between an inner ring and an outer ring, a nozzle that enters and opens in an annular space formed between the inner ring and the outer ring of the rolling bearing, and the nozzle A rolling bearing device including a tank for storing lubricating oil therein, and having an oil supply unit that supplies the lubricating oil in the tank to the annular space via the nozzle.
The tank has an outflow restricting means for restricting the lubricating oil in the tank from flowing out through the nozzle, and does not have a pump for supplying the lubricating oil in the tank toward the nozzle. The rolling bearing is configured to be supplied to the annular space through the nozzle by being sucked by the negative pressure generated in the annular space by the rotation of the rolling bearing. apparatus. 上記タンク内に含油部材が充填され、この含油部材が上記流出制限手段として機能するように構成されていることを特徴とする請求項１に記載の転がり軸受装置。   The rolling bearing device according to claim 1, wherein an oil-containing member is filled in the tank, and the oil-containing member functions as the outflow restricting means. 上記含油手段がスポンジであることを特徴とする請求項２に記載の転がり軸受装置。   The rolling bearing device according to claim 2, wherein the oil-impregnating means is a sponge. 上記含油手段がフェルトであることを特徴とする請求項２に記載の転がり軸受装置。   The rolling bearing device according to claim 2, wherein the oil impregnation means is felt. 上記流出制限手段が、上記タンクとノズルの開口部間に介在するオリフィスであることを特徴とする請求項１に記載の転がり軸受装置。   2. The rolling bearing device according to claim 1, wherein the outflow restricting means is an orifice interposed between the opening of the tank and the nozzle.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2080921A2 (en) 2008-01-16 2009-07-22 JTEKT Corporation Lubricating device for a rolling bearing
JP2011133091A (en) * 2009-12-25 2011-07-07 Jtekt Corp Rolling bearing device
US20160084313A1 (en) * 2013-05-10 2016-03-24 Ntn Corporation Rolling bearing device
US9945422B2 (en) 2016-05-11 2018-04-17 Jtekt Corporation Rolling bearing apparatus
US10030709B2 (en) 2015-07-14 2018-07-24 Jtekt Corporation Bearing apparatus and lubrication unit
US10221892B2 (en) 2016-05-11 2019-03-05 Jtekt Corporation Rolling bearing apparatus

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Publication number Priority date Publication date Assignee Title
JPH0165424U (en) * 1987-10-16 1989-04-26
WO2001031215A1 (en) * 1999-10-26 2001-05-03 Makino Milling Machine Co., Ltd. Rotating shaft device and machine tool having the rotating shaft device
JP2004316707A (en) * 2003-04-14 2004-11-11 Koyo Seiko Co Ltd Bearing device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0165424U (en) * 1987-10-16 1989-04-26
WO2001031215A1 (en) * 1999-10-26 2001-05-03 Makino Milling Machine Co., Ltd. Rotating shaft device and machine tool having the rotating shaft device
JP2004316707A (en) * 2003-04-14 2004-11-11 Koyo Seiko Co Ltd Bearing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2080921A2 (en) 2008-01-16 2009-07-22 JTEKT Corporation Lubricating device for a rolling bearing
JP2011133091A (en) * 2009-12-25 2011-07-07 Jtekt Corp Rolling bearing device
US20160084313A1 (en) * 2013-05-10 2016-03-24 Ntn Corporation Rolling bearing device
US9581198B2 (en) * 2013-05-10 2017-02-28 Ntn Corporation Rolling bearing device
US10030709B2 (en) 2015-07-14 2018-07-24 Jtekt Corporation Bearing apparatus and lubrication unit
US9945422B2 (en) 2016-05-11 2018-04-17 Jtekt Corporation Rolling bearing apparatus
US10221892B2 (en) 2016-05-11 2019-03-05 Jtekt Corporation Rolling bearing apparatus

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