JP2581102Y2 - Bearing lubrication device - Google Patents
Bearing lubrication deviceInfo
- Publication number
- JP2581102Y2 JP2581102Y2 JP1992074490U JP7449092U JP2581102Y2 JP 2581102 Y2 JP2581102 Y2 JP 2581102Y2 JP 1992074490 U JP1992074490 U JP 1992074490U JP 7449092 U JP7449092 U JP 7449092U JP 2581102 Y2 JP2581102 Y2 JP 2581102Y2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- inner ring
- bearing
- lubricating oil
- scoop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【0001】[0001]
【産業上の利用分野】本考案は、例えば工作機械の主軸
といった高速回転軸を支承する軸受の潤滑装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for a bearing for supporting a high-speed rotating shaft such as a main shaft of a machine tool.
【0002】[0002]
【従来の技術】工作機械の主軸や航空機のジェットエン
ジン等に使用される軸受のように、高速回転下で使用さ
れる軸受では、内輪と外輪との間に相当な温度差が生
じ、この温度差に伴う予圧の増加等によって、軸受の温
度上昇や軸受寿命の短縮化等を招きやすい。従来、この
ような内輪の温度上昇を抑制するために、図4に示すよ
うなアンダーレース潤滑装置が使用されている。このア
ンダーレース潤滑装置では、内輪(20)の円周等配位置
に複数の貫通孔(21)を設け、この貫通孔(21)内に潤
滑油を供給して内輪(20)の冷却と軸受内の潤滑とを同
時に行なうようにしている。内輪(20)には、一方の端
面を軸方向に延ばしたスクープ(22)が一体形成され、
このスクープ(22)の環状の内側空間(23)には貫通孔
(21)の一端が連通している。そして、給油部材(24)
に設けた噴射孔(24a)からスクープ(22)の内側空間
(23)に向けて潤滑油を噴射させ、潤滑油を内側空間
(23)を介して各貫通孔(21)に流入させるのである。
貫通孔(21)内に流入した潤滑油は、貫通孔(21)に沿
って進みながら内輪(20)を冷却する。また、その一部
は貫通孔(21)と内輪軌道面(20a)とを連通する給油
孔(25)を通って軸受内に流入し、軸受内の潤滑を行な
う。2. Description of the Related Art In bearings used under high-speed rotation, such as bearings used in main spindles of machine tools and jet engines of aircraft, a considerable temperature difference occurs between an inner ring and an outer ring. The increase in the preload due to the difference tends to cause a rise in the temperature of the bearing and a shortening of the life of the bearing. Conventionally, an underrace lubrication device as shown in FIG. 4 has been used to suppress such a rise in the temperature of the inner race. In this under-race lubrication device, a plurality of through holes (21) are provided at circumferentially equidistant positions of the inner ring (20), and lubricating oil is supplied into the through holes (21) to cool the inner ring (20) and to provide a bearing. The lubrication inside is performed at the same time. A scoop (22) having one end face extending in the axial direction is integrally formed with the inner ring (20),
One end of a through hole (21) communicates with the annular inner space (23) of the scoop (22). And the refueling member (24)
The lubricating oil is injected from the injection hole (24a) provided in the inner space (23) of the scoop (22), and the lubricating oil flows into each through hole (21) through the inner space (23). .
The lubricating oil that has flowed into the through hole (21) cools the inner race (20) while traveling along the through hole (21). Further, a part thereof flows into the bearing through an oil supply hole (25) communicating the through hole (21) and the inner raceway surface (20a), and lubricates the inside of the bearing.
【0003】[0003]
【考案が解決しようとする課題】上記構成の潤滑装置で
は、以下の問題点があるため改善が要望されている。Problems to be solved by the invention The lubricating device having the above-described structure is required to be improved due to the following problems.
【0004】スクープ(22)が内輪(20)に一体形成
されているため、内輪(20)の軸方向長さが長くなる。
このため、内輪(20)の熱処理変形や加工、例えば内輪
幅面(20b)の加工等を精度よく行うことが困難にな
る。また、軸(26)への組み付け時に軸方向に大きなス
ペースを要するため、スピンドル全体が大型化する傾向
にある。[0004] Since the scoop (22) is formed integrally with the inner race (20), the axial length of the inner race (20) becomes longer.
For this reason, it becomes difficult to accurately perform heat treatment deformation and processing of the inner ring (20), for example, processing of the inner ring width surface (20b). Further, a large space is required in the axial direction when assembling to the shaft (26), so that the entire spindle tends to be large.
【0005】内輪(20)の軸方向長さが長いため、特
に超高速回転下ではスクープ(22)が径方向に撓みやす
くなる。この場合、スクープ(22)の撓みに付随して生
じる内輪(20)の変形が懸念される。[0005] Since the axial length of the inner ring (20) is long, the scoop (22) tends to bend in the radial direction especially under ultra-high speed rotation. In this case, there is a concern that the inner ring (20) may be deformed accompanying the bending of the scoop (22).
【0006】そこで、本考案は、これらの諸問題を解決
し得る軸受の潤滑装置の提供を目的とする。Accordingly, an object of the present invention is to provide a lubricating device for a bearing that can solve these problems.
【0007】[0007]
【課題を解決するための手段】上記目的の達成のため、
本考案では、回転軸に固定した内輪に形成された軸方向
の貫通孔と、ハウジングに固定され、貫通孔の開口に向
けた潤滑油の噴射孔とを有し、噴射孔から噴射された潤
滑油を貫通孔内に流入させて軸受の潤滑・冷却を行う軸
受の潤滑装置において、内輪の端面の前記噴射孔と対向
する部位に、前記貫通孔の開口と連通する環状溝を設け
た。In order to achieve the above object,
The present invention has an axial through-hole formed in an inner ring fixed to a rotating shaft, and a lubricating oil injection hole fixed to a housing and directed to an opening of the through-hole. In a bearing lubrication device for lubricating and cooling a bearing by allowing oil to flow into a through-hole, an annular groove communicating with an opening of the through-hole is provided at a portion of the end face of the inner ring facing the injection hole.
【0008】この場合、内輪に貫通孔と内輪軌道面とを
連通させる給油孔を設け、この給油孔を潤滑油の噴射孔
側から見て上り傾斜となるように傾けるとよい。In this case, it is preferable to provide an oil supply hole for communicating the through hole and the inner ring raceway surface in the inner ring, and to incline the oil supply hole so as to be inclined upward when viewed from the lubricating oil injection hole side.
【0009】[0009]
【作用】内輪の端面の前記噴射孔と対向する部位に、前
記貫通孔の開口と連通する環状溝を設けることにより、
固定側に設けられた噴射孔からの潤滑油が環状溝を介し
て回転側の各貫通孔に流入し、内輪を冷却する。この場
合、環状溝がスクープの内側空間と同様の役割を果たす
のでスクープが不要となる。An annular groove communicating with the opening of the through hole is provided at a portion of the end face of the inner ring facing the injection hole,
Lubricating oil from the injection hole provided on the fixed side flows into each through hole on the rotation side through the annular groove, and cools the inner race. In this case, the annular groove plays the same role as the inner space of the scoop, so that the scoop is unnecessary.
【0010】内輪に貫通孔と内輪軌道面とを連通させる
給油孔を設け、この給油孔を潤滑油の噴射孔側から見て
上り傾斜となるように傾ければ、内輪軌道面側への潤滑
油の流通性を向上させることができる。An oil supply hole is provided in the inner ring for communicating the through hole with the inner ring raceway surface. If the oil supply hole is inclined so as to be inclined upward when viewed from the lubricating oil injection hole side, lubrication to the inner ring raceway surface side is achieved. Oil distribution can be improved.
【0011】[0011]
【実施例】以下、本考案の実施例を図1乃至図3に基づ
いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【0012】図1は、本考案をアンギュラ玉軸受に適用
した場合の実施例を示す。アンギュラ玉軸受は、軸
(1)に固定した内輪(2)と、ハウジング(3)に固
定した外輪(4)と、内・外輪間に介在させた複数の玉
(5)と、玉(5)を円周等配位置で保持する保持器
(6)とで構成される。内輪(2)には、その軌道面下
を軸方向に走る貫通孔(7)が円周等配位置の複数箇所
に設けられると共に(同図(b)参照)、この貫通孔
(7)と内輪軌道面(2a)とを連通する給油孔(8)が
後述する噴射孔(9a)から見て上り傾斜となるよう角度
(θ1 )だけ傾けて設けられている。ハウジング(3)
には外輪(4)と接触させて給油部材(9)が固定され
ており、この給油部材(9)には、貫通孔(7)の開口
(7a)に向けて潤滑油の噴射孔(9a)が形成されてい
る。FIG. 1 shows an embodiment in which the present invention is applied to an angular ball bearing. The angular ball bearing includes an inner ring (2) fixed to a shaft (1), an outer ring (4) fixed to a housing (3), a plurality of balls (5) interposed between the inner and outer rings, and a ball (5). ) In a circumferentially equidistant position. The inner ring (2) is provided with a plurality of through holes (7) running in the axial direction below the raceway surface at circumferentially equidistant positions (see FIG. 2 (b)). An oil supply hole (8) communicating with the inner ring raceway surface (2a) is provided at an angle (θ 1 ) so as to be inclined upward when viewed from an injection hole (9a) described later. Housing (3)
A lubricating member (9) is fixed in contact with the outer ring (4). The lubricating member (9) has a lubricating oil injection hole (9a) toward the opening (7a) of the through hole (7). ) Is formed.
【0013】本考案では、内輪(2)の端面の噴射孔
(9a)と対向する部位に環状溝(10)を設け、この環状
溝(10)を各貫通孔(7)の開口(7a)と連通させてい
る。このような構成により、環状溝(10)が、図4に示
すスクープ(22)の内側空間(23)と同様の役割を果た
すので、スクープ(22)が不要となる。In the present invention, an annular groove (10) is provided at a portion of the end face of the inner ring (2) facing the injection hole (9a), and this annular groove (10) is formed in the opening (7a) of each through hole (7). And communicate with it. With such a configuration, the annular groove (10) plays the same role as the inner space (23) of the scoop (22) shown in FIG. 4, so that the scoop (22) becomes unnecessary.
【0014】図2に本考案の第2の実施例を示す。これ
は、内輪(2)の噴射孔(9a)側の端面に、内輪(2)
と別体のスクープ部材(12)を装着することにより、図
4に示すものと同様の効果を得るようにしたものであ
る。このスクープ部材(12)は周面壁(12a)及び側面
壁(12b)を有する有底円筒状に形成され、側面壁(12
b)を内輪(2)に接触させて軸(1)に嵌合される。
この嵌合により、噴射孔(9a)と対向する部位に環状空
間(13)が形成される。前記側面壁(12b)の円周等配
位置には、各貫通孔(7)と環状空間(13)とを連通す
る軸方向の連通孔(14)が形成されている。FIG. 2 shows a second embodiment of the present invention. This is because the inner ring (2) has an inner ring (2)
By attaching a separate scoop member (12), the same effect as that shown in FIG. 4 is obtained. The scoop member (12) is formed in a bottomed cylindrical shape having a peripheral wall (12a) and a side wall (12b).
b) is brought into contact with the inner ring (2) and fitted to the shaft (1).
By this fitting, an annular space (13) is formed at a portion facing the injection hole (9a). An axial communication hole (14) for communicating each through hole (7) with the annular space (13) is formed at a circumferentially equal position on the side wall (12b).
【0015】このスクープ部材(12)は、軸(1)に嵌
合した後、各貫通孔(7)と連通孔(14)とが一致する
よう周方向に位置合わせした上で、ノックピン等で内輪
(2)に対して周方向に固定される。これにより、環状
空間(13)と各貫通孔(7)とが連通孔(14)を介して
連通し、環状空間(13)はスクープ(22)の内側空間
(23)と同様の役割を果たすようになる。After the scoop member (12) is fitted to the shaft (1), it is positioned in the circumferential direction so that the through holes (7) and the communication holes (14) coincide with each other. It is fixed to the inner ring (2) in the circumferential direction. Thereby, the annular space (13) communicates with each through hole (7) through the communication hole (14), and the annular space (13) plays a role similar to the inner space (23) of the scoop (22). Become like
【0016】この構成によれば、スクープと内輪(2)
とが別体で構成されているため、上述した内輪(2)の
加工性の低下及び高速回転時における内輪(2)の変形
といった懸念が解消される。According to this configuration, the scoop and the inner ring (2)
Are separately formed, the above-mentioned concerns such as a reduction in workability of the inner race (2) and a deformation of the inner race (2) during high-speed rotation are eliminated.
【0017】なお、図1及び図2に示す潤滑装置では、
給油孔(8)を径方向に対して角度(θ1)だけ傾斜さ
せているが、これは、内輪軌道面(2a)側への潤滑油の
流通性を向上させるためであり、傾斜角度(θ1)をゼ
ロとして給油孔(8)を径方向に向けてもかまわない。In the lubricating device shown in FIGS. 1 and 2,
The oil supply hole (8) is inclined by an angle (θ 1 ) with respect to the radial direction. This is to improve the flowability of lubricating oil to the inner ring raceway surface (2a) side, and the inclination angle ( The oil supply hole (8) may be directed in the radial direction with θ 1 ) being zero.
【0018】また、図3に示すように、環状溝(10)
(図1参照)を角度(θ2)だけ傾斜させてもよい。As shown in FIG. 3, the annular groove (10)
(See FIG. 1) may be inclined by an angle (θ 2 ).
【0019】[0019]
【考案の効果】本考案では、内輪端面の噴射孔と対向す
る部位に、貫通孔の開口と連通する環状溝を設け、この
環状溝にスクープの内側空間と同様の役割を果たさせて
いる。従って、従来、内輪に一体に設けられていたスク
ープが不要となり、内輪の加工性の低下、スピンドルの
大型化、超高速回転時における内輪の変形といった懸念
を解消することが可能となる。According to the present invention, an annular groove communicating with the opening of the through hole is provided in a portion of the inner ring end face facing the injection hole, and this annular groove plays the same role as the inner space of the scoop. . Therefore, a scoop conventionally provided integrally with the inner ring becomes unnecessary, and it is possible to eliminate concerns such as a decrease in workability of the inner ring, an increase in the size of the spindle, and a deformation of the inner ring during ultra-high-speed rotation.
【0020】内輪に貫通孔と内輪軌道面とを連通させる
給油孔を設け、この給油孔を潤滑油の噴射孔側から見て
上り傾斜となるように傾ければ、内輪軌道面側への潤滑
油の流通性を向上させることができ、より良好な潤滑性
能を実現することができる。An oil supply hole is provided in the inner ring for communicating the through hole with the inner ring raceway surface. If the oil supply hole is inclined so as to be inclined upward when viewed from the lubricating oil injection hole side, lubrication to the inner ring raceway surface side is achieved. Oil circulation can be improved, and better lubrication performance can be realized.
【図1】本考案の第1の実施例を示す断面図(a)、及
び内輪(2)主要部の正面図である。FIG. 1 is a cross-sectional view illustrating a first embodiment of the present invention, and a front view of a main part of an inner ring (2).
【図2】本考案の第2の実施例を示す断面図である。FIG. 2 is a sectional view showing a second embodiment of the present invention.
【図3】環状溝の他の構成例を示す断面図である。FIG. 3 is a cross-sectional view illustrating another configuration example of the annular groove.
【図4】従来のアンダーレース潤滑装置を示す断面図で
ある。FIG. 4 is a sectional view showing a conventional underrace lubrication device.
1 軸 2 内輪 7 貫通孔 7a 開口 9a 噴射孔 10 環状溝 12 スクープ部材 13 環状空間 1 shaft 2 inner ring 7 through hole 7a opening 9a injection hole 10 annular groove 12 scoop member 13 annular space
Claims (2)
向の貫通孔と、ハウジングに固定され、貫通孔の開口に
向けた潤滑油の噴射孔とを有し、噴射孔から噴射された
潤滑油を貫通孔内に流入させて軸受の潤滑・冷却を行う
軸受の潤滑装置において、 内輪の端面の前記噴射孔と対向する部位に、前記貫通孔
の開口と連通する環状溝を設けたことを特徴とする軸受
の潤滑装置。1. An axial through-hole formed in an inner race fixed to a rotating shaft, and a lubricating oil injection hole fixed to a housing and directed to an opening of the through-hole. In a bearing lubrication device that lubricates and cools a bearing by flowing lubricating oil into a through-hole, an annular groove communicating with an opening of the through-hole is provided in a portion of the end face of the inner ring facing the injection hole. A lubricating device for a bearing, characterized in that:
る給油孔を設け、この給油孔を潤滑油の噴射孔側から見
て上り傾斜となるように傾けたことを特徴とする請求項
1記載の軸受の潤滑装置。2. A through hole and an inner raceway surface are communicated with the inner race.
The lubrication hole is viewed from the lubricating oil injection hole side.
Characterized by being inclined so as to be an upward slope.
The lubricating device for bearings according to claim 1 .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1992074490U JP2581102Y2 (en) | 1992-10-26 | 1992-10-26 | Bearing lubrication device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1992074490U JP2581102Y2 (en) | 1992-10-26 | 1992-10-26 | Bearing lubrication device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0637624U JPH0637624U (en) | 1994-05-20 |
JP2581102Y2 true JP2581102Y2 (en) | 1998-09-21 |
Family
ID=13548795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1992074490U Expired - Fee Related JP2581102Y2 (en) | 1992-10-26 | 1992-10-26 | Bearing lubrication device |
Country Status (1)
Country | Link |
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JP (1) | JP2581102Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4583429B2 (en) * | 2007-10-15 | 2010-11-17 | 株式会社ジェイテクト | Rolling bearing device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2503488Y2 (en) * | 1990-09-28 | 1996-07-03 | エヌテイエヌ株式会社 | Bearing lubricator |
JP3020726U (en) * | 1995-07-18 | 1996-02-06 | 株式会社ヤクルト本社 | Dividable collective packaging box |
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1992
- 1992-10-26 JP JP1992074490U patent/JP2581102Y2/en not_active Expired - Fee Related
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JPH0637624U (en) | 1994-05-20 |
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