JP2008087097A - Main spindle device - Google Patents

Main spindle device Download PDF

Info

Publication number
JP2008087097A
JP2008087097A JP2006269583A JP2006269583A JP2008087097A JP 2008087097 A JP2008087097 A JP 2008087097A JP 2006269583 A JP2006269583 A JP 2006269583A JP 2006269583 A JP2006269583 A JP 2006269583A JP 2008087097 A JP2008087097 A JP 2008087097A
Authority
JP
Japan
Prior art keywords
bearing
housing
grease
spindle device
lubricated
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.)
Granted
Application number
JP2006269583A
Other languages
Japanese (ja)
Other versions
JP5003087B2 (en
Inventor
Osamu Iwasaki
修 岩崎
Yoshifumi Inagaki
好史 稲垣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP2006269583A priority Critical patent/JP5003087B2/en
Publication of JP2008087097A publication Critical patent/JP2008087097A/en
Application granted granted Critical
Publication of JP5003087B2 publication Critical patent/JP5003087B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Auxiliary Devices For Machine Tools (AREA)
  • Turning (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a main spindle device capable of making a bearing supporting a rotary shaft and a bearing supporting a rotary joint both have long service lives and excellently maintaining lubrication of the mutual bearings without affecting lubrication of either one bearing by lubrication of the other bearing, even when lubricant is leaked. <P>SOLUTION: This main spindle device 10 has a housing 11, the rotary shaft 12 relatively rotatably arranged via the first bearing 13 in the housing 11, and a rotating pipe shaft 62 relatively rotatably arranged via the second bearing 61 in the housing 11. The rotary shaft 12 is provided with the rotary joint 15 for supplying fluid. Both of the first bearing 13 and the second bearing 61 are lubricated by either one lubricant of grease and lubricating oil. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、主軸装置に関し、より詳細には、回転軸及び回転継手に用いられる軸受の潤滑条件を改良した主軸装置に関する。   The present invention relates to a main shaft device, and more particularly to a main shaft device having improved lubrication conditions for bearings used for a rotary shaft and a rotary joint.

従来、工作機械本体の工具主軸（回転軸）を支持する主軸装置では、工具主軸にクーラント等の流体を供給する回転継手が使用されており、工具主軸の後端に装着される回転管軸と、対向するフローティングシートにそれぞれシールリングが取り付けられ、互いのシールリングを密着状態として、クーラントを固定側から回転側に供給する（例えば、特許文献１参照）。特許文献１に記載の回転継手では、工具主軸の後端に装着される回転管軸が軸受を介して支持されている。
特開２００１−６５７６０号公報 Conventionally, in a spindle device that supports a tool spindle (rotary axis) of a machine tool body, a rotary joint that supplies a fluid such as coolant to the tool spindle has been used. A seal ring is attached to each of the opposing floating sheets, and the coolant is supplied from the fixed side to the rotating side with the seal rings in close contact with each other (for example, see Patent Document 1). In the rotary joint described in Patent Document 1, a rotary tube shaft attached to the rear end of the tool spindle is supported via a bearing.
JP 2001-65760 A

ところで、特許文献１に記載の回転継手は軸受を介して支持されているが、この軸受の潤滑について記載されておらず、この軸受の軸受寿命を向上することが望まれる。また、工具主軸をハウジングに対して回転自在に支持する軸受は、グリースや潤滑油によって潤滑されており、回転継手を支持する軸受の寿命も、工具主軸を支持する軸受の寿命と同等或はそれよりも長いことが望まれる。   By the way, the rotary joint described in Patent Document 1 is supported via a bearing. However, lubrication of this bearing is not described, and it is desired to improve the bearing life of this bearing. In addition, the bearing that supports the tool spindle rotatably with respect to the housing is lubricated with grease or lubricating oil, and the life of the bearing that supports the rotary joint is equal to or the life of the bearing that supports the tool spindle. Longer is desired.

本発明は、前述した課題に鑑みてなされたものであり、その目的は、回転軸及び回転継手を支持する両方の軸受を長寿命とすることができ、また、潤滑剤が漏洩した場合であっても、いずれか一方の軸受の潤滑が他方の軸受の潤滑に影響を及ぼすことが無く、互いの軸受の潤滑を良好に維持することができる主軸装置を提供することにある。   The present invention has been made in view of the above-described problems, and its purpose is to make it possible to extend the life of both the bearings that support the rotating shaft and the rotating joint, and when the lubricant leaks. However, it is an object of the present invention to provide a spindle device that can maintain the lubrication of each bearing well without the lubrication of one of the bearings affecting the lubrication of the other bearing.

本発明の上記目的は、下記の構成により達成される。
（１） ハウジングと、
該ハウジングに対して第１の軸受を介して相対回転可能に配置される回転軸と、
前記ハウジングに対して第２の軸受を介して相対回転可能に配置される軸部材を有し、前記回転軸に流体を供給する回転継手と、
を備える主軸装置であって、
前記第１の軸受と前記第２の軸受の両方が、グリースと潤滑油のいずれかの潤滑剤によって潤滑されることを特徴とする主軸装置。
（２） 前記第１の軸受と前記第２の軸受の両方が、グリース封入によって潤滑されることを特徴とする（１）に記載の主軸装置。
（３） 前記第１の軸受と前記第２の軸受の両方が、グリース補給によって潤滑されることを特徴とする（１）に記載の主軸装置。
（４） 前記第１の軸受と前記第２の軸受の一方がグリース封入によって潤滑され、他方がグリース補給によって潤滑されることを特徴とする（１）に記載の主軸装置。 The above object of the present invention can be achieved by the following constitution.
(1) a housing;
A rotating shaft arranged to be relatively rotatable with respect to the housing via a first bearing;
A rotary joint that has a shaft member arranged to be relatively rotatable with respect to the housing via a second bearing, and supplies a fluid to the rotary shaft;
A spindle device comprising:
Both the first bearing and the second bearing are lubricated with a lubricant of either grease or lubricating oil.
(2) The spindle device according to (1), wherein both the first bearing and the second bearing are lubricated by grease filling.
(3) The spindle device according to (1), wherein both the first bearing and the second bearing are lubricated by replenishing grease.
(4) The spindle device according to (1), wherein one of the first bearing and the second bearing is lubricated by grease filling, and the other is lubricated by grease replenishment.

本発明によれば、回転軸を支持する第１の軸受と回転継手の軸部材を支持する第２の軸受の両方が、グリースと潤滑油のいずれかの潤滑剤によって潤滑されるので、両方の軸受を長寿命とすることができ、また、潤滑剤が漏洩した場合であっても、第１の軸受と第２の軸受のいずれか一方の潤滑が他方の潤滑に影響を及ぼすことが無く、互いの軸受の潤滑を良好に維持することができる。   According to the present invention, both the first bearing that supports the rotary shaft and the second bearing that supports the shaft member of the rotary joint are lubricated by either lubricant of grease or lubricating oil. The bearing can have a long service life, and even when the lubricant leaks, the lubrication of one of the first bearing and the second bearing does not affect the lubrication of the other, The mutual lubrication of the bearings can be maintained well.

また、第１の軸受と第２の軸受の両方が、グリース封入或はグリース補給によって潤滑される場合には、オイルミスト潤滑に比べて、エア及びオイルの消費が無くなり、使用環境を向上することができる。特に、グリース封入とすることで使用環境をより向上することができ、また、グリース補給とすることで間欠的な補給によりグリースが寿命に達することがなくなる。   In addition, when both the first bearing and the second bearing are lubricated by grease filling or grease replenishment, the consumption of air and oil is eliminated and the use environment is improved as compared with oil mist lubrication. Can do. In particular, the use environment can be further improved by enclosing the grease, and the grease does not reach the end of its life due to the intermittent replenishment.

以下、本発明に係る主軸装置の各実施形態を図面に基づいて詳細に説明する。   Hereinafter, each embodiment of a spindle device according to the present invention will be described in detail with reference to the drawings.

（第１実施形態）
図１は本発明の第１実施形態である主軸装置の断面図である。図１に示すように、主軸装置１０は、モータビルトイン式のものであり、ハウジング１１と、ハウジング１１に対して複数（本実施形態では、６つ）の第１の軸受１３を介して相対回転可能に配置される回転軸１２と、ハウジング１１と回転軸１２との間に配置されるモータ１４と、回転軸１２にクーラントやエア等の流体を供給する回転継手１５と、を備える。 (First embodiment)
FIG. 1 is a cross-sectional view of a spindle device according to a first embodiment of the present invention. As shown in FIG. 1, the spindle device 10 is of a motor built-in type, and rotates relative to the housing 11 and a plurality of (six in this embodiment) first bearings 13 with respect to the housing 11. A rotating shaft 12 that can be disposed, a motor 14 disposed between the housing 11 and the rotating shaft 12, and a rotary joint 15 that supplies fluid such as coolant and air to the rotating shaft 12 are provided.

ハウジング１１は、工作機械本体に取り付けられ、軸受１３を介して回転軸１２の前部を回動自在に支持する前側ハウジング２１と、軸受１３を介して回転軸１２の後部を回動自在に支持する後側ハウジング２２と、前側ハウジング２１および後側ハウジング２２の間に配置された中間ハウジング２３とを備える。また、ハウジング１１は、前側ハウジング２１の前端に、フロントカバー２４を備え、後側ハウジング２２の後方に、ジョイントスリーブ２５、継手カートリッジ２６、継手カバー２７を備える。   The housing 11 is attached to the machine tool body, and supports a front housing 21 that rotatably supports the front portion of the rotating shaft 12 via the bearing 13 and a rear portion of the rotating shaft 12 that supports the rear portion of the rotating shaft 12 via the bearing 13. A rear housing 22 and an intermediate housing 23 disposed between the front housing 21 and the rear housing 22. The housing 11 includes a front cover 24 at the front end of the front housing 21, and a joint sleeve 25, a joint cartridge 26, and a joint cover 27 behind the rear housing 22.

モータ１４は、中間ハウジング２３の内周面に取り付けられた冷却筒３１に固定されるステータ３２と、回転軸１２の軸方向中間部１２ａの外周面に取り付けられた焼嵌めスリーブ３３に固定されたロータ３４とを有する。   The motor 14 is fixed to a stator 32 fixed to a cooling cylinder 31 attached to the inner peripheral surface of the intermediate housing 23 and a shrink fitting sleeve 33 attached to the outer peripheral surface of the axial intermediate portion 12a of the rotary shaft 12. And a rotor 34.

回転軸１２は、ロータ３４が固定される軸方向中間部１２ａの前部及び後部にて複数の第１の軸受１３によって支持される。第１の軸受１３は、ハウジング１１の前側ハウジング２１及び後側ハウジング２２に内嵌される外輪４１、回転軸１２に外嵌される内輪４２、及び外輪４１及び内輪４２間に配置される転動体である玉４３をそれぞれ備え、複数の間座４４，４５及びナット４６によって軸方向に規制されている。なお、軸受１３としては、アンギュラ玉軸受を使用しているが、種々の軸受を任意に組み合わせて使用することができる。   The rotating shaft 12 is supported by a plurality of first bearings 13 at the front and rear portions of the axial intermediate portion 12a to which the rotor 34 is fixed. The first bearing 13 includes an outer ring 41 fitted into the front housing 21 and the rear housing 22 of the housing 11, an inner ring 42 fitted around the rotary shaft 12, and a rolling element disposed between the outer ring 41 and the inner ring 42. The balls 43 are respectively provided and are regulated in the axial direction by a plurality of spacers 44 and 45 and nuts 46. In addition, although the angular ball bearing is used as the bearing 13, various bearings can be used in arbitrary combinations.

回転軸１２の内部には、回転軸１２に軸方向に相対移動可能に装着されるドローバー５１と、ドローバー５１が工具ホルダを固定するコレット部５２を軸方向内方に引き込むように、ドローバー５１に外装され、軸方向において回転軸１２とドローバー５１の大径部５１ａとの間に圧縮可能に配置されるばね５３と、が配置される。なお、ばね５３としては、皿ばねを使用しているが、コイルばねや螺旋皿ばね等を使用してもよい。   Inside the rotary shaft 12, a draw bar 51 that is mounted on the rotary shaft 12 so as to be relatively movable in the axial direction and a collet portion 52 that fixes the tool holder to the draw bar 51 are pulled inward in the axial direction. A spring 53 that is externally mounted and is disposed so as to be compressible between the rotary shaft 12 and the large-diameter portion 51a of the draw bar 51 in the axial direction is disposed. In addition, although the disc spring is used as the spring 53, you may use a coil spring, a helical disc spring, etc.

回転継手１５は、継手カートリッジ２６に対して複数（本実施形態では、２つ）の第２の軸受６１を介して相対回転可能に配置される軸部材である回転管軸６２と、回転管軸６２の後端と対向するように継手カバーに装着されるフローティングシート６３と、回転管軸６２の後端部とフローティングシート６３の先端部にそれぞれ装着されるシールリングを有するシール部６４と、を備える。   The rotary joint 15 includes a rotary pipe shaft 62 that is a shaft member that is arranged to be relatively rotatable with respect to the joint cartridge 26 via a plurality of (two in this embodiment) second bearings 61, and a rotary pipe shaft. A floating sheet 63 attached to the joint cover so as to face the rear end of 62, and a seal portion 64 having a seal ring attached to the rear end portion of the rotary tube shaft 62 and the front end portion of the floating sheet 63, respectively. Prepare.

回転管軸６２には、回転軸１２の後端と連結される連結部材６５が装着されて、回転軸１２と共に回転すると共に、内部に通孔６２ａが形成され、連結部材６５に形成された孔部６５ａと連通して回転側流路を構成する。また、フローティングシート６３の内部にも、継手カバー２７に形成された孔部２７ａと連通する通孔６３ａが形成され、固定側流路を構成する。そして、回転管軸６２の通孔６２ａとフローティングシート６３の通孔６３ａをシール部６４を介して連通することで、回転側流路と固定側流路を連結する。   A connecting member 65 connected to the rear end of the rotating shaft 12 is attached to the rotating tube shaft 62 and rotates together with the rotating shaft 12. A through hole 62 a is formed inside the rotating tube shaft 62, and a hole formed in the connecting member 65. The rotation side flow path is configured in communication with the portion 65a. In addition, a through hole 63a that communicates with a hole 27a formed in the joint cover 27 is also formed inside the floating sheet 63, and constitutes a fixed-side flow path. Then, the rotation-side flow path and the fixed-side flow path are connected by communicating the through-hole 62 a of the rotary tube shaft 62 and the through-hole 63 a of the floating sheet 63 via the seal portion 64.

また、第２の軸受６１は、ハウジング１１の継手カートリッジ２６に内嵌される外輪６６、回転管軸６２に外嵌される内輪６７、及び外輪６６及び内輪６７間に配置される転動体である玉６８をそれぞれ備え、複数の間座６９，７０及び止め輪７１等によって軸方向に規制されている。なお、軸受６１も、アンギュラ玉軸受を使用しているが、種々の軸受を任意に組み合わせて使用することができる。   The second bearing 61 is an outer ring 66 fitted in the joint cartridge 26 of the housing 11, an inner ring 67 fitted on the rotary tube shaft 62, and a rolling element disposed between the outer ring 66 and the inner ring 67. Each ball 68 is provided and is regulated in the axial direction by a plurality of spacers 69 and 70, a retaining ring 71 and the like. In addition, although the angular contact ball bearing is used also as the bearing 61, various bearings can be used in arbitrary combinations.

ここで、第１の軸受１３と第２の軸受６１の両方は、オイルミスト潤滑によって潤滑されている。具体的に、ハウジング１１の前側ハウジング２１、後側ハウジング２２、中間ハウジング２３、継手カートリッジ２６には、オイルミストを各軸受１３，６１まで供給するための供給路２１ａ，２２ａ，２３ａ，２６ａが形成され、また、各軸受１３，６１間に配置された外輪間座４５，７０に流路２１ａ，２２ａ，２６ａと連通するノズル４５ａ，７０ａが形成される。そして、エア源からエアを潤滑装置７２に送ることで、噴霧状の潤滑油が各供給路２１ａ，２２ａ，２３ａ，２６ａを通ってノズル４５ａ，７０ａから各軸受１３，６１に向けて吐出される。   Here, both the first bearing 13 and the second bearing 61 are lubricated by oil mist lubrication. Specifically, supply paths 21 a, 22 a, 23 a, and 26 a for supplying oil mist to the bearings 13 and 61 are formed in the front housing 21, the rear housing 22, the intermediate housing 23, and the joint cartridge 26 of the housing 11. In addition, nozzles 45a, 70a communicating with the flow paths 21a, 22a, 26a are formed in outer ring spacers 45, 70 disposed between the bearings 13, 61. Then, by sending air from the air source to the lubrication device 72, the spray-like lubricating oil is discharged from the nozzles 45a and 70a toward the bearings 13 and 61 through the supply paths 21a, 22a, 23a and 26a. .

また、前側ハウジング２１、ジョイントスリーブ２５、継手カートリッジ２６には、排油路２１ｂ，２５ａ，２６ｂが形成されており、第１及び第２の軸受１３，６１を潤滑した潤滑油をハウジング１１の外部に排出する。   The front housing 21, the joint sleeve 25, and the joint cartridge 26 are formed with oil drain passages 21 b, 25 a, 26 b, and the lubricating oil that lubricates the first and second bearings 13, 61 is supplied to the outside of the housing 11. To discharge.

従って、本実施形態の主軸装置１０によれば、第１の軸受１３と第２の軸受６１の両方が、オイルミスト潤滑によって潤滑されているので、両方の軸受１３，６１を長寿命とすることができ、また、潤滑油が漏洩した場合であっても、第１の軸受１３と第２の軸受６１のいずれか一方の潤滑が他方の潤滑に影響を及ぼすことが無く、互いの軸受１３，６１の潤滑を良好に維持することができる。   Therefore, according to the spindle device 10 of the present embodiment, since both the first bearing 13 and the second bearing 61 are lubricated by oil mist lubrication, both bearings 13 and 61 have a long life. Even when the lubricating oil leaks, the lubrication of one of the first bearing 13 and the second bearing 61 does not affect the lubrication of the other, and the bearings 13, The lubrication of 61 can be maintained well.

（第２実施形態）
次に、本発明の第２実施形態に係る主軸装置について図２に基づいて説明する。なお、第１実施形態と同一部分については同一符号を付して説明を省略或いは簡略化する。 (Second Embodiment)
Next, a spindle device according to a second embodiment of the present invention will be described with reference to FIG. Note that the same parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態の主軸装置８０では、第１の軸受１３と第２の軸受６１の両方が、予め封入されたグリースによって潤滑される。このため、本実施形態では、第１実施形態に設けられた、潤滑剤を供給する潤滑装置や、ハウジング１１の各構成部材や外輪間座に形成される供給路、排出路、及びノズル等が不要となる。   In the spindle device 80 of the present embodiment, both the first bearing 13 and the second bearing 61 are lubricated by pre-sealed grease. For this reason, in the present embodiment, the lubrication device that supplies the lubricant, the supply path formed in each component of the housing 11 and the outer ring spacer, the discharge path, the nozzle, and the like provided in the first embodiment are provided. It becomes unnecessary.

このように、本実施形態の主軸装置８０は、第１の軸受１３と第２の軸受６１の両方が、グリース封入によって潤滑されるので、第１実施形態のような潤滑油を使用するオイルミスト潤滑に比べて、エア及びオイルの消費が無くなり、使用環境を向上することができ、また、装置構成を簡潔化できる。
その他の構成及び作用については、第１実施形態のものと同様である。 Thus, in the spindle device 80 of the present embodiment, since both the first bearing 13 and the second bearing 61 are lubricated by grease filling, an oil mist that uses lubricating oil as in the first embodiment. Compared to lubrication, consumption of air and oil is eliminated, the use environment can be improved, and the apparatus configuration can be simplified.
Other configurations and operations are the same as those in the first embodiment.

（第３実施形態）
次に、本発明の第３実施形態に係る主軸装置について図３に基づいて説明する。なお、第１実施形態と同一部分については同一符号を付して説明を省略或いは簡略化する。 (Third embodiment)
Next, a spindle device according to a third embodiment of the present invention will be described with reference to FIG. Note that the same parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態の主軸装置９０では、第１の軸受１３と第２の軸受６１の両方が、グリース補給によって潤滑される。このため、本実施形態では、ハウジング１１の前側ハウジング２１、後側ハウジング２２、中間ハウジング２３、継手カートリッジ２６には、グリースを各軸受１３，６１まで供給するための供給路２１ａ，２２ａ，２３ａ，２６ａが形成され、また、各軸受１３，６１の外輪４１，６６には、グリースを供給するため径方向に貫通する潤滑孔４１ａ，６６ａが形成される。そして、グリース補給装置９１から供給されたグリースが各供給路２１ａ，２２ａ，２３ａ，２６ａを通って外輪４１，６６に形成された潤滑孔４１ａ，６６ａから吐出される。なお、本実施形態のグリースが供給される供給路２１ａ，２２ａ，２３ａ，２６ａは、軸受毎にそれぞれ位相を異ならせて複数設けられている。   In the spindle device 90 of the present embodiment, both the first bearing 13 and the second bearing 61 are lubricated by replenishing grease. Therefore, in the present embodiment, supply paths 21a, 22a, 23a for supplying grease to the respective bearings 13, 61 are supplied to the front housing 21, the rear housing 22, the intermediate housing 23, and the joint cartridge 26 of the housing 11. 26a is formed, and the outer rings 41 and 66 of the bearings 13 and 61 are respectively formed with lubricating holes 41a and 66a penetrating in the radial direction to supply grease. Then, the grease supplied from the grease replenishing device 91 is discharged from the lubricating holes 41a and 66a formed in the outer rings 41 and 66 through the supply paths 21a, 22a, 23a and 26a. Note that a plurality of supply paths 21a, 22a, 23a, and 26a to which the grease of this embodiment is supplied are provided with different phases for each bearing.

このように、本実施形態の主軸装置９０は、第１の軸受１３と第２の軸受６１の両方が、グリース補給によって潤滑されるので、第２実施形態と同様、第１実施形態のような潤滑油を使用するオイルミスト潤滑に比べて、エア及びオイルの消費が無くなり、使用環境を向上することができる。また、グリース補給とすることで間欠的な補給によりグリースが寿命に達することがなくなる。
その他の構成及び作用については、第１実施形態のものと同様である。 As described above, in the spindle device 90 of the present embodiment, since both the first bearing 13 and the second bearing 61 are lubricated by replenishing grease, as in the second embodiment, as in the first embodiment. Compared with oil mist lubrication using lubricating oil, consumption of air and oil is eliminated, and the use environment can be improved. In addition, grease replenishment prevents the grease from reaching the end of its service life due to intermittent replenishment.
Other configurations and operations are the same as those in the first embodiment.

（第４実施形態）
次に、本発明の第４実施形態に係る主軸装置について図４に基づいて説明する。なお、第２及び第３実施形態と同一部分については同一符号を付して説明を省略或いは簡略化する。 (Fourth embodiment)
Next, a spindle device according to a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the second and third embodiments are denoted by the same reference numerals, and the description thereof is omitted or simplified.

本実施形態の主軸装置１００では、第１の軸受１３がグリース補給によって潤滑され、第２の軸受６１が予め封入されたグリースによって潤滑される。このため、第３実施形態で設けられた、継手カートリッジ２６の供給路２６ａや外輪６６の潤滑孔６６ａが不要となる。   In the spindle device 100 of the present embodiment, the first bearing 13 is lubricated by replenishing grease, and the second bearing 61 is lubricated by pre-enclosed grease. For this reason, the supply path 26a of the joint cartridge 26 and the lubrication hole 66a of the outer ring 66 provided in the third embodiment are not necessary.

一般に、回転継手１５の回転管軸６２は回転軸１２に比べて小径であるため、回転軸１２を支持する第１の軸受１３の方が回転管軸６２を支持する第２の軸受６１に比べて高速回転する。このため、第１の軸受１３をグリース補給によって、第２の軸受６１をグリース封入によって潤滑することで、軸受寿命及び主軸装置の構成において効率的な潤滑が可能となる。
その他の構成及び作用については、第２及び第３実施形態のものと同様である。 In general, since the rotary tube shaft 62 of the rotary joint 15 has a smaller diameter than the rotary shaft 12, the first bearing 13 that supports the rotary shaft 12 is compared with the second bearing 61 that supports the rotary tube shaft 62. And rotate at high speed. For this reason, by lubricating the first bearing 13 by replenishing grease and lubricating the second bearing 61 by filling grease, efficient lubrication can be achieved in the bearing life and the configuration of the main spindle device.
Other configurations and operations are the same as those in the second and third embodiments.

尚、本発明は、前述した各実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。
なお、本発明の主軸装置は、モータビルトイン式のものに限定されるものでなく、例えば、回転軸をベルト駆動する構成等であってもよい。 In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
The spindle device of the present invention is not limited to a motor built-in type, and may be configured to drive the rotating shaft with a belt, for example.

本発明の第１実施形態である主軸装置の縦断面図である。It is a longitudinal cross-sectional view of the main shaft apparatus which is 1st Embodiment of this invention. 本発明の第２実施形態である主軸装置の縦断面図である。It is a longitudinal cross-sectional view of the spindle apparatus which is 2nd Embodiment of this invention. 本発明の第３実施形態である主軸装置の縦断面図である。It is a longitudinal cross-sectional view of the spindle apparatus which is 3rd Embodiment of this invention. 本発明の第４実施形態である主軸装置の縦断面図である。It is a longitudinal cross-sectional view of the spindle apparatus which is 4th Embodiment of this invention.

符号の説明Explanation of symbols

１０，８０，９０，１００ 主軸装置
１１ ハウジング
１２ 回転軸
１３ 第１の軸受
１５ 回転継手
６１ 第２の軸受 10, 80, 90, 100 Spindle device 11 Housing 12 Rotating shaft 13 First bearing 15 Rotating joint 61 Second bearing

Claims (4)

ハウジングと、
該ハウジングに対して第１の軸受を介して相対回転可能に配置される回転軸と、
前記ハウジングに対して第２の軸受を介して相対回転可能に配置される軸部材を有し、前記回転軸に流体を供給する回転継手と、
を備える主軸装置であって、
前記第１の軸受と前記第２の軸受の両方が、グリースと潤滑油のいずれかの潤滑剤によって潤滑されることを特徴とする主軸装置。 A housing;
A rotating shaft arranged to be relatively rotatable with respect to the housing via a first bearing;
A rotary joint that has a shaft member arranged to be relatively rotatable with respect to the housing via a second bearing, and supplies a fluid to the rotary shaft;
A spindle device comprising:
Both the first bearing and the second bearing are lubricated with a lubricant of either grease or lubricating oil. 前記第１の軸受と前記第２の軸受の両方が、グリース封入によって潤滑されることを特徴とする請求項１に記載の主軸装置。   2. The spindle apparatus according to claim 1, wherein both the first bearing and the second bearing are lubricated by grease filling. 前記第１の軸受と前記第２の軸受の両方が、グリース補給によって潤滑されることを特徴とする請求項１に記載の主軸装置。   2. The spindle apparatus according to claim 1, wherein both the first bearing and the second bearing are lubricated by replenishing grease. 前記第１の軸受と前記第２の軸受の一方がグリース封入によって潤滑され、他方がグリース補給によって潤滑されることを特徴とする請求項１に記載の主軸装置。   2. The spindle device according to claim 1, wherein one of the first bearing and the second bearing is lubricated by grease filling, and the other is lubricated by grease replenishment.
JP2006269583A 2006-09-29 2006-09-29 Motor built-in spindle Active JP5003087B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006269583A JP5003087B2 (en) 2006-09-29 2006-09-29 Motor built-in spindle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006269583A JP5003087B2 (en) 2006-09-29 2006-09-29 Motor built-in spindle

Publications (2)

Publication Number Publication Date
JP2008087097A true JP2008087097A (en) 2008-04-17
JP5003087B2 JP5003087B2 (en) 2012-08-15

Family

ID=39371782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006269583A Active JP5003087B2 (en) 2006-09-29 2006-09-29 Motor built-in spindle

Country Status (1)

Country Link
JP (1) JP5003087B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5323230B1 (en) * 2012-06-15 2013-10-23 株式会社東芝 Electronic device, filter adjustment device, filter adjustment method, and filter adjustment program
WO2013183857A1 (en) * 2012-06-04 2013-12-12 Lee Jae Woong Bowl structure and rotating vertical shaft structure of centrifugal separator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08290346A (en) * 1995-02-22 1996-11-05 Koyo Mach Ind Co Ltd Spindle device with built-in planetary accelerating mechanism
JP2000288870A (en) * 1999-04-08 2000-10-17 Makino Milling Mach Co Ltd Rotating spindle device
JP2005335063A (en) * 2001-08-01 2005-12-08 Nsk Ltd Rolling bearing and spindle device for machine tool
JP2006102906A (en) * 2004-10-08 2006-04-20 Nsk Ltd Main spindle device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08290346A (en) * 1995-02-22 1996-11-05 Koyo Mach Ind Co Ltd Spindle device with built-in planetary accelerating mechanism
JP2000288870A (en) * 1999-04-08 2000-10-17 Makino Milling Mach Co Ltd Rotating spindle device
JP2005335063A (en) * 2001-08-01 2005-12-08 Nsk Ltd Rolling bearing and spindle device for machine tool
JP2006102906A (en) * 2004-10-08 2006-04-20 Nsk Ltd Main spindle device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013183857A1 (en) * 2012-06-04 2013-12-12 Lee Jae Woong Bowl structure and rotating vertical shaft structure of centrifugal separator
JP5323230B1 (en) * 2012-06-15 2013-10-23 株式会社東芝 Electronic device, filter adjustment device, filter adjustment method, and filter adjustment program

Also Published As

Publication number Publication date
JP5003087B2 (en) 2012-08-15

Similar Documents

Publication Publication Date Title
JP6206616B2 (en) Spindle device and machine tool
JP2006194402A (en) Rolling bearing device
JP5589419B2 (en) Bearing device and spindle device for machine tool
TW201807329A (en) Ball bearing, ball bearing device, and machine tool
JP2015021582A (en) Tapered roller bearing and power transmission device using the same
JP5326304B2 (en) Spindle device for machine tools
JP7164962B2 (en) Cooling structure of bearing device
JP5003087B2 (en) Motor built-in spindle
JP2006194406A (en) Rolling bearing device
JP5347538B2 (en) Angular contact ball bearings for spindle equipment
JP5845652B2 (en) Bearing device and spindle device for machine tool
JP5316249B2 (en) Rolling bearing device and rolling bearing used therefor
JP2006226427A (en) Rolling bearing
JP2011106493A (en) Rolling bearing device
JP2009047265A (en) Rolling bearing device
WO2019188621A1 (en) Cooling structure for bearing device
JP2006234072A (en) Rolling bearing
JP2013185443A (en) Bearing device
WO2020090277A1 (en) Spindle device having built-in motor
JP2000225505A (en) Spindle device
JP5262151B2 (en) Spindle device for machine tools
JP2008202798A (en) Rolling bearing arrangement
KR20150050260A (en) Spindle structure of machine tool
JP2005069321A (en) Bearing device and spindle device
JP5353432B2 (en) Rolling bearing device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090225

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101130

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110524

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110721

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120207

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120406

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120424

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120507

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150601

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 5003087

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150