JP2007024252A - Lubricating device of rolling bearing - Google Patents

Lubricating device of rolling bearing Download PDF

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Publication number
JP2007024252A
JP2007024252A JP2005209847A JP2005209847A JP2007024252A JP 2007024252 A JP2007024252 A JP 2007024252A JP 2005209847 A JP2005209847 A JP 2005209847A JP 2005209847 A JP2005209847 A JP 2005209847A JP 2007024252 A JP2007024252 A JP 2007024252A
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Prior art keywords
inner ring
cooling oil
bearing
oil
rolling bearing
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JP2005209847A
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Japanese (ja)
Inventor
Masatsugu Mori
正継 森
Takatsugu Furubayashi
卓嗣 古林
Tatsuo Kawase
達夫 川瀬
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2005209847A priority Critical patent/JP2007024252A/en
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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
    • F16C37/00—Cooling of bearings
    • F16C37/007—Cooling of bearings of rolling bearings
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool an inner ring by a cooling oil without forming a circumferential groove in the end face of the inner ring and allow a part of the cooling oil to flow into a bearing as a lubricating oil. <P>SOLUTION: A cooling oil introduction member 11 having a nozzle 12 jetting a cooling oil is disposed at one end of the angular ball bearing 1. A seal part 13 facing the outer diameter tapered surface 2b of the inner ring 2 at one end through a clearance is formed by the extension part 11a of the cooling oil introduction member 11 and the cooling oil is jetted from the nozzle 12 to a small diameter step part 2c formed at the end of the inner ring 2. Consequently, the inner ring 2 can be efficiently cooled by the cooling oil without forming the circumferential groove in the end face of the inner ring 2, and the part of the cooling oil is allowed to flow into the bearing as the lubricating oil. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、内輪の冷却機能を兼ね備えた転がり軸受の潤滑装置に関する。   The present invention relates to a rolling bearing lubrication device having an inner ring cooling function.

工作機械の主軸等のように高速回転する回転軸を支持する転がり軸受では、加工負荷等によって内輪の温度が外輪よりも高くなる。このためこの温度差に伴う内輪と外輪の熱膨張差によって軸受の予圧が過大となり、軸受寿命が短くなる問題がある。   In a rolling bearing that supports a rotating shaft that rotates at a high speed, such as a main shaft of a machine tool, the temperature of the inner ring is higher than that of the outer ring due to processing load and the like. For this reason, there is a problem that the bearing preload becomes excessive due to the difference in thermal expansion between the inner ring and the outer ring due to this temperature difference, and the bearing life is shortened.

このような問題に対して、冷却油供給装置から供給される冷却油を転がり軸受の軸方向一端側から回転輪の内輪に吐出し、この冷却油が吐出される一端側の内輪の外径面と隙間を持って対向するシール部を設けて、冷却油の一部をこのシール部の隙間から軸受内部へ潤滑油として流入させ、別途の冷却装置を設けることなく内輪の冷却機能を兼ね備えるようにした転がり軸受の潤滑装置がある（例えば、特許文献１参照）。   To solve such a problem, the cooling oil supplied from the cooling oil supply device is discharged from the one end side in the axial direction of the rolling bearing to the inner ring of the rotating wheel, and the outer diameter surface of the inner ring on one end side from which the cooling oil is discharged. In order to have a cooling function for the inner ring without providing a separate cooling device, a part of the cooling oil is provided as a lubricating oil into the bearing from the gap of the sealing part. There is a lubrication device for a rolling bearing (for example, see Patent Document 1).

特許文献１に記載されたものでは、冷却油で効率よく内輪を冷却するために、一端側の内輪の端面に周方向へ延びる円周溝を設け、この円周溝に向けて冷却油を吐出している。また、この一端側の内輪の外径面を軌道面側へ拡径するテーパ面として、円周溝に吐出される冷却油の一部を内輪の回転に伴う遠心力でテーパ面に沿わせて軌道面側へ導き、軸受内部へ流入させるようにしている。   In order to cool the inner ring efficiently with cooling oil, the one described in Patent Document 1 is provided with a circumferential groove extending in the circumferential direction on the end face of the inner ring on one end side, and the cooling oil is discharged toward the circumferential groove. is doing. In addition, as a tapered surface that expands the outer diameter surface of the inner ring on one end side to the raceway surface side, a part of the cooling oil discharged to the circumferential groove is caused to follow the tapered surface by the centrifugal force accompanying the rotation of the inner ring. It is guided to the raceway side to flow into the bearing.

特開２００４−３６０８２８号公報（第５−７図）Japanese Patent Laid-Open No. 2004-360828 (FIGS. 5-7)

特許文献１に記載された転がり軸受の潤滑装置では、効率よく内輪を冷却するために、一端側の内輪の端面に周方向へ延びる円周溝を設け、冷却油をこの円周溝に向けて吐出しているので、円周溝の加工に手間がかかるとともに、熱処理後の円周溝内のスケール除去が難しい問題がある。   In the rolling bearing lubrication device described in Patent Document 1, in order to efficiently cool the inner ring, a circumferential groove extending in the circumferential direction is provided on the end face of the inner ring on one end side, and cooling oil is directed toward the circumferential groove. Since it is discharged, it takes time to process the circumferential groove, and it is difficult to remove the scale in the circumferential groove after the heat treatment.

そこで、本発明の課題は、内輪の端面に円周溝を設けることなく、冷却油で効率よく内輪を冷却して、その一部を潤滑油として軸受内部に流入させることである。   Accordingly, an object of the present invention is to efficiently cool the inner ring with cooling oil without providing a circumferential groove on the end face of the inner ring, and allow a part of the inner ring to flow into the bearing as lubricating oil.

上記の課題を解決するために、本発明は、冷却油供給装置から供給される冷却油を転がり軸受の軸方向一端側から回転輪の内輪に吐出し、この冷却油が吐出される一端側の内輪の外径面と隙間を持って対向するシール部を設けて、前記内輪の一端側に吐出される冷却油の一部を、この内輪の外径面とシール部との隙間から軸受内部へ潤滑油として流入させるようにした転がり軸受の潤滑装置において、前記一端側の内輪の端部に小径段差部を設け、この小径段差部に前記転がり軸受の軸方向一端側から吐出される冷却油を吐出する構成を採用した。   In order to solve the above-described problems, the present invention discharges cooling oil supplied from a cooling oil supply device from one end side in the axial direction of a rolling bearing to an inner ring of a rotating wheel, and at one end side from which this cooling oil is discharged. A seal portion is provided to face the outer diameter surface of the inner ring with a gap, and a part of the cooling oil discharged to one end side of the inner ring is transferred from the gap between the outer diameter surface of the inner ring and the seal portion to the inside of the bearing. In a rolling bearing lubrication apparatus configured to flow as lubricating oil, a small-diameter step portion is provided at an end of the inner ring on the one end side, and cooling oil discharged from one end side in the axial direction of the rolling bearing is provided in the small-diameter step portion. A structure for discharging was adopted.

すなわち、一端側の内輪の端部に小径段差部を設け、この小径段差部に転がり軸受の軸方向一端側から吐出される冷却油を吐出することにより、内輪の端面に円周溝を設けることなく、冷却油で効率よく内輪を冷却して、その一部を潤滑油として軸受内部に流入させることができるようにした。   That is, a small-diameter step portion is provided at the end of the inner ring on one end side, and a circumferential groove is provided on the end surface of the inner ring by discharging cooling oil discharged from one axial end side of the rolling bearing to the small-diameter step portion. Instead, the inner ring is efficiently cooled with cooling oil, and a part of the inner ring can flow into the bearing as lubricating oil.

前記小径段差部の外径面に環状溝または螺旋溝を設けることにより、内輪の冷却効率をより高めることができる。   By providing an annular groove or a spiral groove on the outer diameter surface of the small-diameter step portion, the cooling efficiency of the inner ring can be further increased.

本発明の転がり軸受の潤滑装置は、一端側の内輪の端部に小径段差部を設け、この小径段差部に転がり軸受の軸方向一端側から吐出される冷却油を吐出するようにしたので、内輪の端面に円周溝を設けることなく、冷却油で効率よく内輪を冷却して、その一部を潤滑油として軸受内部に流入させることができる。   Since the rolling bearing lubrication device of the present invention is provided with a small-diameter step portion at the end of the inner ring on one end side, the cooling oil discharged from one end side in the axial direction of the rolling bearing is discharged to this small-diameter step portion. Without providing a circumferential groove on the end face of the inner ring, the inner ring can be efficiently cooled with the cooling oil, and a part of the inner ring can flow into the bearing as the lubricating oil.

前記小径段差部の外径面に環状溝または螺旋溝を設けることにより、内輪の冷却効率をより高めることができる。   By providing an annular groove or a spiral groove on the outer diameter surface of the small-diameter step portion, the cooling efficiency of the inner ring can be further increased.

以下、図面に基づき、本発明の実施形態を説明する。図１は、本発明に係る転がり軸受の潤滑装置を採用した工作機械のスピンドル装置を示す。このスピンドル装置は、端部に工具またはワークのチャックが取り付けられる主軸２０が、軸受箱２１に軸方向で離して組み込まれた２つの転がり軸受であるアンギュラ玉軸受１で支持されている。また、スピンドル装置には、後述するように、軸受箱２１とアンギュラ玉軸受１の内輪２を冷却する冷却油を供給する冷却油供給装置３０が接続されている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a spindle device of a machine tool employing a rolling bearing lubrication device according to the present invention. In this spindle apparatus, a main shaft 20 to which a chuck of a tool or a workpiece is attached at an end is supported by an angular ball bearing 1 which is two rolling bearings incorporated in a bearing box 21 apart in the axial direction. Further, as will be described later, a cooling oil supply device 30 that supplies cooling oil for cooling the bearing housing 21 and the inner ring 2 of the angular ball bearing 1 is connected to the spindle device.

図２に示すように、前記アンギュラ玉軸受１は、内輪２と外輪３の各軌道面２ａ、３ａ間にボール４が保持器５で保持され、内輪２にアキシアル荷重が負荷される正面側で、外輪３の内径面にカウンタボア３ｂが設けられ、背面側の内輪２の外径面に軌道面２ａ側へ拡径するテーパ面２ｂが設けられるとともに、その端部に小径段差部２ｃが設けられている。   As shown in FIG. 2, the angular ball bearing 1 has a ball 4 held by a cage 5 between the raceway surfaces 2 a and 3 a of the inner ring 2 and the outer ring 3 on the front side where an axial load is applied to the inner ring 2. A counterbore 3b is provided on the inner diameter surface of the outer ring 3, a taper surface 2b is provided on the outer diameter surface of the inner ring 2 on the back side, and a small-diameter step portion 2c is provided at the end thereof. It has been.

図１に示したように、前記軸受箱２１は、内箱２１ａと外箱２１ｂの二重構造とされ、２つのアンギュラ玉軸受１の内輪２は、間に内輪間座２２を介在させて主軸２０に外嵌され、両側を内輪押さえ２３で固定されている。また、間に外輪間座２４を介在させた２つの外輪３は、本発明に係る潤滑装置を構成する冷却油導入部材１１を背面側の端面に当接され、内箱２１ａに内嵌されて両側を外輪押さえ２５で固定されている。   As shown in FIG. 1, the bearing box 21 has a double structure of an inner box 21a and an outer box 21b, and the inner ring 2 of the two angular ball bearings 1 has a main shaft with an inner ring spacer 22 interposed therebetween. The outer ring 20 is fitted and the both sides are fixed by the inner ring presser 23. Further, the two outer rings 3 with the outer ring spacer 24 interposed therebetween are brought into contact with the end face on the back side of the cooling oil introduction member 11 constituting the lubricating device according to the present invention, and are fitted into the inner box 21a. Both sides are fixed by outer ring pressers 25.

前記軸受箱２１の内箱２１ａと外箱２１ｂの間には冷却油循環路３１が形成され、冷却油供給装置３０から供給経路３２と戻り経路３３で循環供給される冷却油が、外箱２１ｂの外径面に設けられた導入孔３４ａと排出孔３４ｂを通して冷却油循環路３１に供給されるようになっている。   A cooling oil circulation path 31 is formed between the inner box 21a and the outer box 21b of the bearing box 21, and the cooling oil circulated and supplied from the cooling oil supply device 30 through the supply path 32 and the return path 33 is supplied to the outer box 21b. The cooling oil circulation path 31 is supplied through an introduction hole 34a and a discharge hole 34b provided on the outer diameter surface of the gas.

また、前記冷却油供給装置３０の供給経路３２には、圧力調整弁３５と油濾過器３６を介在させた分岐供給経路３２ａが設けられ、内箱２１ａの両端面に設けられた各導入孔３７に冷却油が供給されるようになっている。各導入孔３７に供給される冷却油は冷却油導入部材１１へ導入され、後述するように、各アンギュラ玉軸受１の軸受内部の潤滑と内輪２の冷却に使用された後、内箱２１ａの下側に設けられた油回収路３８に回収され、油ポンプ３９で冷却油供給装置３０に戻される。   Further, the supply passage 32 of the cooling oil supply device 30 is provided with a branch supply passage 32a through which a pressure regulating valve 35 and an oil filter 36 are interposed, and the respective introduction holes 37 provided at both end faces of the inner box 21a. Cooling oil is supplied to the tank. The cooling oil supplied to each introduction hole 37 is introduced into the cooling oil introduction member 11 and, as will be described later, after being used for lubricating the inside of each angular ball bearing 1 and cooling the inner ring 2, The oil is recovered in an oil recovery path 38 provided on the lower side and returned to the cooling oil supply device 30 by an oil pump 39.

図２に示したように、前記外輪３の背面側端面に当接された冷却油導入部材１１は内箱２１ａに内嵌され、内箱２１ａの導入孔３７に連通する導入孔１１ｂが設けられて、その先端に内輪２の小径段差部２ｃへ冷却油を吐出するノズル１２が設けられている。また、冷却油導入部材１１の前面側には、内輪２と保持器５の間へ張り出して内輪２のテーパ面２ｂと隙間を持って対向するシール部１３を形成する張り出し部１１ａが設けられている。   As shown in FIG. 2, the cooling oil introduction member 11 abutted against the rear side end face of the outer ring 3 is fitted in the inner box 21a, and an introduction hole 11b communicating with the introduction hole 37 of the inner box 21a is provided. A nozzle 12 that discharges cooling oil to the small-diameter step portion 2c of the inner ring 2 is provided at the tip. Further, on the front surface side of the cooling oil introduction member 11, an overhanging portion 11 a is provided that protrudes between the inner ring 2 and the cage 5 and forms a seal portion 13 that faces the tapered surface 2 b of the inner ring 2 with a gap. Yes.

前記小径段差部２ｃへ吐出されて内輪２を冷却した冷却油の一部は、内輪２の回転に伴う遠心力により小径段差部２ｃからテーパ面２ｂの端部へ移動し、さらにテーパ面２ｂに沿ってシール部１３の隙間を導かれ、軸受内部へ潤滑油として流入する。また、内輪２を冷却した大部分の冷却油は、冷却油導入部材１１の後面側に取り付けられた蓋部材１４で密閉された貯油空間１５に溜まる。   A part of the cooling oil discharged to the small diameter step portion 2c to cool the inner ring 2 moves from the small diameter step portion 2c to the end of the tapered surface 2b by the centrifugal force accompanying the rotation of the inner ring 2, and further to the tapered surface 2b. The gap of the seal portion 13 is guided along and flows into the bearing as lubricating oil. In addition, most of the cooling oil that has cooled the inner ring 2 is accumulated in an oil storage space 15 that is sealed by a lid member 14 attached to the rear surface side of the cooling oil introduction member 11.

図３に示すように、前記冷却油導入部材１１には、貯油空間１５に連通する排出孔１１ｃと、外輪３の端面に沿って軸受内部に連通する排出溝１１ｄが設けられている。また、内箱２１ａの下部には、これらの排出孔１１ｃと排出溝１１ｄとを、それぞれ油回収路３８に連通する排出孔４０ａ、４０ｂが設けられている。したがって、内輪２を冷却して貯油空間１５に溜まった冷却油は、排出孔１１ｃ、４０ａを通して油回収路３８に回収され、軸受内部を潤滑した一部の冷却油は、排出溝１１ｄと排出孔４０ｂを通して油回収路３８に回収される。   As shown in FIG. 3, the cooling oil introduction member 11 is provided with a discharge hole 11 c communicating with the oil storage space 15 and a discharge groove 11 d communicating with the inside of the bearing along the end surface of the outer ring 3. Further, at the lower part of the inner box 21a, there are provided discharge holes 40a and 40b for communicating the discharge hole 11c and the discharge groove 11d with the oil recovery path 38, respectively. Accordingly, the cooling oil that has cooled the inner ring 2 and accumulated in the oil storage space 15 is recovered in the oil recovery passage 38 through the discharge holes 11c and 40a, and a part of the cooling oil that has lubricated the inside of the bearing is discharged into the discharge grooves 11d and the discharge holes. The oil is recovered in the oil recovery path 38 through 40b.

図４は、図２に示した小径段差部２ｃの変形例を示す。この変形例では、小径段差部２ｃの外径面に螺旋溝６が設けられており、冷却油を受ける小径段差部２ｃの表面積が広くなって、内輪２の冷却効率がより高められる。螺旋溝６は環状溝としてもよい。   FIG. 4 shows a modification of the small diameter step portion 2c shown in FIG. In this modification, the spiral groove 6 is provided on the outer diameter surface of the small-diameter step portion 2c, and the surface area of the small-diameter step portion 2c that receives the cooling oil is increased, so that the cooling efficiency of the inner ring 2 is further increased. The spiral groove 6 may be an annular groove.

上述した実施形態では、転がり軸受をアンギュラ玉軸受としたが、本発明に係る転がり軸受の潤滑装置は、深溝玉軸受やころ軸受等の他の転がり軸受にも適用することができる。   In the embodiment described above, the rolling bearing is an angular ball bearing. However, the rolling bearing lubrication device according to the present invention can also be applied to other rolling bearings such as a deep groove ball bearing and a roller bearing.

本発明に係る転がり軸受の潤滑装置を採用したスピンドル装置とこれに接続された冷却油供給装置を示す構成図The block diagram which shows the spindle apparatus which employ | adopted the lubricating device of the rolling bearing which concerns on this invention, and the cooling oil supply apparatus connected to this 図１の潤滑装置のＡ部を拡大して示す断面図Sectional drawing which expands and shows the A section of the lubricating device of FIG. 図１の潤滑装置のＢ部を拡大して示す断面図Sectional drawing which expands and shows the B section of the lubricating device of FIG. 図２の小径段差部の変形例を示す断面図Sectional drawing which shows the modification of the small diameter level | step-difference part of FIG.

符号の説明Explanation of symbols

１ アンギュラ玉軸受
２ 内輪
３ 外輪
２ａ、３ａ 軌道面
２ｂ テーパ面
２ｃ 小径段差部
３ｂ カウンタボア
４ ボール
５ 保持器
６ 螺旋溝
１１ 冷却油導入部材
１１ａ 張り出し部
１１ｂ 導入孔
１１ｃ 排出孔
１１ｄ 排出溝
１２ ノズル
１３ シール部
１４ 蓋部材
１５ 貯油空間
２０ 主軸
２１ 軸受箱
２１ａ 内箱
２１ｂ 外箱
２２ 内輪間座
２３ 内輪押さえ
２４ 外輪間座
２５ 外輪押さえ
３０ 冷却油供給装置
３１ 冷却油循環路
３２ 供給経路
３２ａ 分岐供給経路
３３ 戻り経路
３４ａ 導入孔
３４ｂ 排出孔
３５ 圧力調整弁
３６ 油濾過器
３７ 導入孔
３８ 油回収路
３９ 油ポンプ
４０ａ、４０ｂ 排出孔 DESCRIPTION OF SYMBOLS 1 Angular contact ball bearing 2 Inner ring 3 Outer ring 2a, 3a Raceway surface 2b Tapered surface 2c Small diameter step part 3b Counter bore 4 Ball 5 Cage 6 Spiral groove 11 Cooling oil introduction member 11a Overhang part 11b Inlet hole 11c Discharge hole 11d Discharge groove 12 Nozzle 13 Seal part 14 Lid member 15 Oil storage space 20 Main shaft 21 Bearing box 21a Inner box 21b Outer box 22 Inner ring spacer 23 Inner ring retainer 24 Outer ring spacer 25 Outer ring retainer 30 Cooling oil supply device 31 Cooling oil circulation path 32 Supply path 32a Branch supply Path 33 return path 34a introduction hole 34b discharge hole 35 pressure regulating valve 36 oil filter 37 introduction hole 38 oil recovery path 39 oil pumps 40a, 40b discharge hole

Claims (2)

冷却油供給装置から供給される冷却油を転がり軸受の軸方向一端側から回転輪の内輪に吐出し、この冷却油が吐出される一端側の内輪の外径面と隙間を持って対向するシール部を設けて、前記内輪の一端側に吐出される冷却油の一部を、この内輪の外径面とシール部との隙間から軸受内部へ潤滑油として流入させるようにした転がり軸受の潤滑装置において、前記一端側の内輪の端部に小径段差部を設け、この小径段差部に前記転がり軸受の軸方向一端側から吐出される冷却油を吐出するようにしたことを特徴とする転がり軸受の潤滑装置。   The cooling oil supplied from the cooling oil supply device is discharged from one end in the axial direction of the rolling bearing to the inner ring of the rotating wheel, and the seal is opposed to the outer diameter surface of the inner ring on one end where this cooling oil is discharged with a gap. A rolling bearing lubrication device in which a part of the cooling oil discharged to one end of the inner ring is introduced into the bearing through a gap between the outer diameter surface of the inner ring and the seal portion. In the rolling bearing according to claim 1, wherein a small diameter step portion is provided at an end of the inner ring on the one end side, and cooling oil discharged from one end side in the axial direction of the rolling bearing is discharged to the small diameter step portion. Lubrication device. 前記小径段差部の外径面に環状溝または螺旋溝を設けた請求項１に記載の転がり軸受の潤滑装置。   The rolling bearing lubrication device according to claim 1, wherein an annular groove or a spiral groove is provided on an outer diameter surface of the small-diameter step portion.
JP2005209847A 2005-07-20 2005-07-20 Lubricating device of rolling bearing Pending JP2007024252A (en)

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Publications (1)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009216244A (en) * 2008-02-12 2009-09-24 Nsk Ltd Spindle device bearing
CN103180626A (en) * 2010-10-19 2013-06-26 Ntn株式会社 Roller bearing
JP2014062618A (en) * 2012-09-24 2014-04-10 Ntn Corp Lubricating structure of bearing device
US9541137B2 (en) 2012-09-24 2017-01-10 Ntn Corporation Cooling structure for bearing device
CN107366681A (en) * 2016-05-11 2017-11-21 株式会社捷太格特 Rolling bearing system
CN113339408A (en) * 2021-07-08 2021-09-03 哈电风能有限公司 Generator single bearing lubrication sealing structure and generator set
CN113738767A (en) * 2021-11-02 2021-12-03 杭州斯格尔液压机械有限公司 Rolling bearing pressing plate special for electric automobile

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009216244A (en) * 2008-02-12 2009-09-24 Nsk Ltd Spindle device bearing
CN103180626A (en) * 2010-10-19 2013-06-26 Ntn株式会社 Roller bearing
CN103180626B (en) * 2010-10-19 2015-12-02 Ntn株式会社 Rolling bearing
JP2014062618A (en) * 2012-09-24 2014-04-10 Ntn Corp Lubricating structure of bearing device
US9541137B2 (en) 2012-09-24 2017-01-10 Ntn Corporation Cooling structure for bearing device
US10280980B2 (en) 2012-09-24 2019-05-07 Ntn Corporation Cooling structure for bearing device
CN107366681A (en) * 2016-05-11 2017-11-21 株式会社捷太格特 Rolling bearing system
CN107366681B (en) * 2016-05-11 2021-03-09 株式会社捷太格特 Rolling bearing device
CN113339408A (en) * 2021-07-08 2021-09-03 哈电风能有限公司 Generator single bearing lubrication sealing structure and generator set
CN113339408B (en) * 2021-07-08 2022-05-31 哈电风能有限公司 Generator single bearing lubrication sealing structure and generator set
CN113738767A (en) * 2021-11-02 2021-12-03 杭州斯格尔液压机械有限公司 Rolling bearing pressing plate special for electric automobile

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