JPH06241364A - Rotary joint - Google Patents
Rotary jointInfo
- Publication number
- JPH06241364A JPH06241364A JP4607793A JP4607793A JPH06241364A JP H06241364 A JPH06241364 A JP H06241364A JP 4607793 A JP4607793 A JP 4607793A JP 4607793 A JP4607793 A JP 4607793A JP H06241364 A JPH06241364 A JP H06241364A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- pair
- rotary joint
- housing
- seal members
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
- B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
- B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
- B23Q1/0036—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained one of those parts being a tool
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Joints Allowing Movement (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、固定管路と回転管路と
の間で流体を移送する場合に用いるロータリジョイント
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary joint used for transferring a fluid between a fixed pipeline and a rotary pipeline.
【０００２】[0002]
【従来の技術】工作機械の主軸装置内部に加工液や加圧
空気を流通して、主軸先端に装着した工具へ、その加工
液や加圧空気を供給するスピンドルスルークーラント装
置がある。このスピンドルスルークーラント装置などに
用い固定管路から回転管路へ流体を移送する公知のロー
タリジョイントにおいては、回転軸及び移動軸端面に、
それぞれ取付けた一対のシール部材の材質は、耐摩耗性
のある超硬合金、セラミックスなどからなり、その滑動
面はラップ加工などにより極めて平滑に仕上げされてい
る。2. Description of the Related Art There is a spindle through coolant device which circulates a working fluid or pressurized air inside a spindle device of a machine tool and supplies the working fluid or pressurized air to a tool mounted on the tip of the spindle. In a known rotary joint that transfers fluid from a fixed pipeline to a rotary pipeline used in this spindle through coolant device or the like, on the rotary shaft and the moving shaft end surface,
The material of the pair of seal members attached to each is made of wear-resistant cemented carbide, ceramics, etc., and the sliding surface thereof is extremely smoothed by lapping or the like.
【０００３】すなわち、固定管路側に設けられ軸線方向
に移動可能な前記移動軸は、圧縮ばねにより軸方向に付
勢されていて、一対のシール部材の対向滑動面が常時、
接触状態にあり、回転軸を駆動しながら移動軸及び回転
軸の流体通路に圧力流体を通すときに、一対のシール部
材の対向滑動面は、両者間のロータリシールとして機能
している。移動軸及び回転軸の前記通路を通る流体は、
一部で一対のシール部材の滑動面を潤滑するが、通路に
流体を通すことなく回転軸側を駆動することもあるの
で、その際は、常時、ばね圧により付勢され押圧・接触
するシール滑動面の摩耗・発熱は回避すべくもなく、シ
ール部材の耐用期間が短縮される不都合があった。特
に、回転軸の回転数が大きくなるに及んで、これを放置
することができない状態にある。That is, the movable shaft provided on the fixed pipe side and movable in the axial direction is urged in the axial direction by a compression spring, and the opposed sliding surfaces of the pair of seal members are always
In the contact state, when the pressure fluid is passed through the fluid passages of the moving shaft and the rotating shaft while driving the rotating shaft, the opposed sliding surfaces of the pair of seal members function as a rotary seal between them. The fluid passing through the passages of the moving shaft and the rotating shaft is
Although the sliding surfaces of the pair of seal members are partly lubricated, the rotating shaft side may be driven without passing fluid through the passage.In that case, the seal is always biased by spring pressure to press and contact. Inevitably, wear and heat generation on the sliding surface cannot be avoided, and the service life of the seal member is shortened. In particular, as the number of rotations of the rotating shaft increases, it cannot be left unattended.
【０００４】上述の不都合を解消するため、移動軸の流
体通路入口側にダイヤフラムを取り付けて、これをハウ
ジング側に係止し、定位置では一対のシール部材の対向
滑動面を隔離するよう組付けたロータリジョイント（特
開平３−61786 号公報参照）が、開発されている。この
種型式のロータリジョイントによれば、一対のシール部
材の滑動面が、常時、離れているので、移動軸及び回転
軸間に流体を通すことなく回転軸側を駆動しても、一対
のシール部材の滑動面が相互に接触・滑動することはな
いので、前記シール部材が摩耗するおそれがない。In order to solve the above-mentioned inconvenience, a diaphragm is attached to the fluid passage inlet side of the moving shaft, is locked to the housing side, and is assembled so as to separate the opposed sliding surfaces of the pair of seal members at a fixed position. A rotary joint (see Japanese Patent Laid-Open No. 3-61786) has also been developed. According to this type of rotary joint, since the sliding surfaces of the pair of seal members are always separated from each other, even if the rotary shaft side is driven without passing the fluid between the moving shaft and the rotary shaft, the pair of seal members cannot be sealed. Since the sliding surfaces of the members do not contact or slide with each other, there is no risk of the seal member wearing.
【０００５】また、同ジョイントの流体通路に圧力流体
を通すときは、前記流体圧がダイヤフラムに作用して移
動軸を回転軸方向に変位させ、シール部材の滑動面間を
気密に押圧・接触させるので、ロータリジョイントの気
密は保持される。すなわち、上記のロータリジョイント
のシール部材滑動面は、ジョイントに流体を通すときの
み密着するから、所要のロータリジョイントの機能を効
果的に奏することは勿論、シール部材の耐用期間を大幅
に延長させることができる。Further, when the pressure fluid is passed through the fluid passage of the joint, the fluid pressure acts on the diaphragm to displace the moving shaft in the rotating shaft direction, so that the sliding surfaces of the seal member are pressed / contacted airtightly. Therefore, the airtightness of the rotary joint is maintained. That is, since the sliding surface of the seal member of the rotary joint comes into close contact only when a fluid is passed through the joint, not only the function of the required rotary joint is effectively exhibited, but also the service life of the seal member is significantly extended. You can
【０００６】また、別の従来技術として、前記移動軸
を、ハウジング内筒にプランジャ形式で、気密、かつ、
滑動可能に嵌合し、一対のシール部材の滑動面を相互に
隔離すよう軸方向に付勢すると共に、移動軸の流体通路
にチェック弁を施したロータリジョイント（実開平２−
19987 号公報参照）が提案されている。As another conventional technique, the moving shaft is hermetically sealed in a housing inner cylinder in a plunger type, and
It is slidably fitted and urged in the axial direction so as to isolate the sliding surfaces of the pair of seal members from each other, and a rotary joint provided with a check valve in the fluid passage of the moving shaft (actual flat opening 2-
(See 19987 publication) has been proposed.
【０００７】この型式のロータリジョイントは、常時、
一対のシール部材の滑動面が隔離しているから、ジョイ
ントの通路に流体を通すことなく回転軸側を駆動したと
ころで一対のシール部材の滑動面が摩耗することがない
のは勿論、移動軸の流体通路に圧力流体を供給するとき
には、同流体圧により、まず、プランジャ形式の移動軸
が付勢力に抗して回転軸方向に変位し、一対のシール部
材の滑動面を気密に圧接触させ、同部材のシール作用を
確保する。しかる後、移動軸の流体通路に設けたチェッ
ク弁が前記圧力流体により開放されるので、一対のシー
ル部材の滑動接触面の気密が完成した後に通路内に圧力
流体が通るようにしたものである。This type of rotary joint is
Since the sliding surfaces of the pair of seal members are isolated from each other, the sliding surfaces of the pair of seal members will not be worn when the rotary shaft side is driven without passing fluid through the passage of the joint. When supplying the pressure fluid to the fluid passage, first by the same fluid pressure, the plunger type moving shaft is displaced in the direction of the rotation axis against the biasing force, and the sliding surfaces of the pair of seal members are brought into airtight pressure contact with each other. The sealing action of the same member is ensured. After that, since the check valve provided in the fluid passage of the moving shaft is opened by the pressure fluid, the pressure fluid passes through the passage after the airtightness of the sliding contact surfaces of the pair of seal members is completed. .
【０００８】[0008]
【発明が解決しようとする課題】ところで、上記公知の
ロータリジョイントの流体通路には、従来、圧力液体の
みを供給していたところ、そこには圧力気体をも通すニ
ーズが生じている。液体を供給する場合は、一対のシー
ル部材の滑動面に若干の液体がしみ出して潤滑作用を行
うので、滑動面摩耗の問題は発生しないが、圧力気体を
通して回転軸側を駆動する場合、シール部材の滑動面に
潤滑液が供給されることなく同面が滑動・摩擦すること
になるので滑動面の摩耗が大きくなり、シール部材の傷
みが早い。殊に、回転軸側の回転数が極端に大きく（例
えば、10,000回転／分を超える）なると、シール部材の
滑動接触面に摩擦熱が蓄積してシール部材の寿命を著し
く縮めるという問題がある。By the way, when only the pressure liquid is conventionally supplied to the fluid passage of the above-mentioned known rotary joint, there is a need for passing the pressure gas therethrough. When supplying liquid, a little liquid seeps out to the sliding surfaces of the pair of seal members and performs a lubricating action, so there is no problem of sliding surface wear, but when driving the rotating shaft side through pressure gas, the seal Since the sliding surface of the member slides and rubs without being supplied with the lubricating liquid, the sliding surface is greatly worn and the seal member is damaged quickly. In particular, when the number of rotations on the rotating shaft side becomes extremely large (for example, over 10,000 rotations / minute), frictional heat accumulates on the sliding contact surface of the seal member, which significantly shortens the life of the seal member.
【０００９】本件発明は、上記問題点の解消を目的と
し、通路に圧力液体または気体を流通させても外部に漏
洩することがなく、そのシール部材の滑動面の摩耗が少
ないロータリジョイントを提供するものである。他の目
的は、圧力気体を流通させるとき、一対のシール部材の
滑動面を非接触状態に保持し、回転軸側を高速で駆動し
てもシール部材の寿命を縮めることのないロータリジョ
イントを提供しようとするものである。The present invention aims to solve the above-mentioned problems, and provides a rotary joint which does not leak to the outside even if a pressure liquid or gas is circulated in a passage and the sliding surface of the seal member is less worn. It is a thing. Another object is to provide a rotary joint in which the sliding surfaces of a pair of seal members are held in a non-contact state when a pressure gas is circulated, and the life of the seal members is not shortened even when the rotary shaft side is driven at high speed. Is what you are trying to do.
【００１０】[0010]
【課題を解決するための手段】本発明は、上述目的を達
成するため、ロータリジョイントを通して圧力流体を供
給する場合には、ジョイント内の一対のシール部材の滑
動面を、あらかじめ気密・接触状態にして回転軸側を高
速駆動し、圧力気体を供給するときは、前記一対のシー
ル部材の滑動面をあらかじめ離間させて、その摩擦接触
を防ぎ、回転軸側の高速駆動により発生する滑動面の発
熱・摩耗を回避するようにしたものである。また、回転
軸側の軸受機構を省略して、ロータリジョイントの構造
を簡略化しようとするものである。すなわち、In order to achieve the above-mentioned object, the present invention sets the sliding surfaces of a pair of seal members in the joint to be in an airtight and contact state in advance when the pressure fluid is supplied through the rotary joint. When the rotary shaft side is driven at high speed to supply pressure gas, the sliding surfaces of the pair of seal members are separated in advance to prevent their frictional contact, and the sliding surface generates heat due to the high speed driving of the rotary shaft side. -It is designed to avoid wear. Further, the bearing mechanism on the rotary shaft side is omitted to simplify the structure of the rotary joint. That is,
【００１１】（１） ハウジングと、前記ハウジング内
に設けられ、軸心部に流体通路を有する回転軸と、前記
ハウジング内に前記回転軸に対向配置され、かつ軸線方
向に移動可能に嵌着され、軸心部に流体通路を有する移
動軸と、前記回転軸と前記移動軸との対向面に設けられ
た一対のシール部材と、を具備し、前記流体通路に気体
を流通させる場合は、前記一対のシール部材を非接触状
態にするように構成したロータリジョイントが提供され
る。(1) A housing, a rotary shaft provided in the housing and having a fluid passage at an axial center thereof, and arranged in the housing so as to be opposed to the rotary shaft and movably fitted in the axial direction. A moving shaft having a fluid passage in the axial center thereof, and a pair of seal members provided on the facing surfaces of the rotating shaft and the moving shaft, wherein when a gas is circulated in the fluid passage, A rotary joint configured to bring a pair of seal members into a non-contact state is provided.
【００１２】また、（２） ハウジングと、前記ハウジ
ング内に設けられ、軸心部に流体通路を有する回転軸
と、前記ハウジング内に前記回転軸に対向配置され、か
つ軸線方向に移動可能に嵌着され、軸心部に流体通路を
有する移動軸と、前記回転軸と前記移動軸との対向面に
設けられた一対のシール部材と、前記移動軸を軸線方向
に往復動させ、前記一対のシール部材を接触状態または
非接触状態にする移動手段と、を具備したロータリジョ
イントが提供される。Further, (2) a housing, a rotary shaft provided in the housing and having a fluid passage at an axial center thereof, and arranged in the housing so as to face the rotary shaft and fitted so as to be movable in the axial direction. And a pair of seal members provided on the facing surfaces of the rotating shaft and the moving shaft, the moving shaft being reciprocated in the axial direction, And a moving means for bringing the seal member into contact or non-contact with each other.
【００１３】また、（３） 前記移動手段は、前記流体
通路に液体を流通させる場合は、前記一対のシール部材
を接触状態にするよう構成した上記（２）に記載のロー
タリジョイントが提供される。また、（４） 前記移動
手段は、接触状態の前記一対のシール部材の接触圧力を
張説可能にする接触圧力調節手段を具備してなる上記
（３）に記載のロータリジョイントが提供される。(3) The rotary joint according to (2), wherein the moving means is configured to bring the pair of seal members into contact with each other when the liquid is allowed to flow through the fluid passage. . Further, (4) the rotary joint according to the above (3), wherein the moving means comprises a contact pressure adjusting means capable of extending the contact pressure of the pair of seal members in a contact state.
【００１４】また、（５） 前記ハウジングは、外部の
回転軸装置の非回転部に固定され、前記回転軸は、前記
外部の回転軸装置の回転部に固定されてなる上記（１）
ないし（４）のいずれか１項に記載のロータリジョイン
トが提供される。また、（６）前記ハウジングに軸受を
介して回転自在に支持されてなる上記（１）ないし
（５）のいずれか１項に記載のロータリジョイントが提
供される。(5) The housing is fixed to a non-rotating portion of an external rotating shaft device, and the rotating shaft is fixed to a rotating portion of the external rotating shaft device.
A rotary joint according to any one of (1) to (4) is provided. Further, (6) there is provided the rotary joint according to any one of (1) to (5), which is rotatably supported by the housing via a bearing.
【００１５】[0015]
【作用】ロータリジョイントの移動軸及び回転軸の流体
通路に圧力空気などの気体を流通させる場合は、移動手
段によって一対のシール部材を非接触状態にし、一対の
シール部材の滑動面の摩擦、摩耗を回避する。前記流体
通路に液体を流通させる場合は、移動手段によって一対
のシール部材を接触状態にし、液体の漏洩を防止する。
液体は若干量一対のシール部材の滑動面にしみ出し潤滑
作用を成すので、一対のシール部材が滑動しても、摩擦
や摩耗が大きくなる問題点はない。When a gas such as compressed air is circulated in the fluid passages of the rotary shaft and the rotary shaft of the rotary joint, the pair of seal members are brought into non-contact with each other by the moving means to cause friction and wear of the sliding surfaces of the pair of seal members. To avoid. When the liquid is passed through the fluid passage, the pair of seal members are brought into contact with each other by the moving means to prevent the liquid from leaking.
Since a small amount of the liquid exudes to the sliding surfaces of the pair of seal members and has a lubricating action, even if the pair of seal members slide, friction and wear do not increase.
【００１６】[0016]
【実施例】以下に、図面に沿って本発明の好ましい実施
例について説明するが、本発明は、以下に説明の実施例
のみに限られるものではないことは、上述説明に徴して
明らかである。また、以下に述べる本実施例の構成部材
の一部は、本件出願当時の当業界公知の技術レベルの範
囲内で、当業者が任意に設計変更を施すことが可能なも
のも含まれることに鑑みれば、格別の理由を示すことな
く本実施例の構成のみに基づいて、本発明の要旨を限定
して解すべきではない。The preferred embodiments of the present invention will be described below with reference to the drawings. However, it is apparent from the above description that the present invention is not limited to the embodiments described below. . In addition, some of the constituent members of the present embodiment described below include those that can be arbitrarily modified by those skilled in the art within the technical level known in the art at the time of the present application. In view of this, it should not be understood that the gist of the present invention is limited based on only the configuration of the present embodiment without showing a particular reason.
【００１７】図１は、本発明ロータリジョイントの第１
実施例の構成を示す断面図、図２は、図１のII−II断面
図である。ロータリジョイント１が、工作機械の主軸装
置３の後端部に取り付けられている。主軸装置３は、主
軸頭５に軸受７によって主軸９を回転自在に支持する構
成になっている。一方、ロータリジョイント１のハウジ
ング11は、主軸頭５と同軸に主軸頭５端面に固定されて
いる。ロータリジョイント１の回転軸13は、主軸９と同
軸に主軸９端面にねじ結合によって固定され、ハウジン
グ11内に形成した空間部に収容されている。FIG. 1 shows a first rotary joint of the present invention.
FIG. 2 is a sectional view showing the structure of the embodiment, and FIG. 2 is a sectional view taken along the line II-II in FIG. A rotary joint 1 is attached to a rear end portion of a spindle device 3 of a machine tool. The spindle device 3 is configured to rotatably support a spindle 9 by a bearing 7 on a spindle head 5. On the other hand, the housing 11 of the rotary joint 1 is fixed to the end surface of the spindle head 5 coaxially with the spindle head 5. The rotary shaft 13 of the rotary joint 1 is fixed to the end face of the main shaft 9 coaxially with the main shaft 9 by screwing, and is housed in a space formed in the housing 11.
【００１８】回転軸13の主軸９と反対側の端面には、シ
ール部材15が固着されている。シール部材15と対面した
シール部材17が移動軸19の一端面に固着され、移動軸19
は、ハウジングの円筒孔21内に軸線方向に移動可能に嵌
着されている。移動軸19のシール部材17側はフランジ形
状をしており、ピン23によって回り止めされている。さ
らに、ハウジング11内の空間には、２つのカラー25，27
が固着され、回転軸13に装着したカーボンリング29が、
この２つのカラー25，27の間に挟まれて装着されてい
る。カラー27と移動軸19のフランジ部との間には、圧縮
ばね31がピン23に巻き付く形態で装着されており、移動
軸19を常時、主軸９と反対方向に付勢している。つま
り、一対のシール部材15，17は、通常、非接触状態にな
っている。A seal member 15 is fixed to the end surface of the rotary shaft 13 opposite to the main shaft 9. A seal member 17 facing the seal member 15 is fixed to one end surface of the moving shaft 19,
Is fitted in the cylindrical hole 21 of the housing so as to be movable in the axial direction. The moving shaft 19 has a flange shape on the seal member 17 side and is prevented from rotating by a pin 23. Furthermore, the space inside the housing 11 has two collars 25, 27.
The carbon ring 29 attached to the rotary shaft 13
It is mounted by being sandwiched between these two collars 25 and 27. A compression spring 31 is mounted between the collar 27 and the flange of the moving shaft 19 in a form wound around the pin 23, and always urges the moving shaft 19 in the direction opposite to the main shaft 9. That is, the pair of seal members 15 and 17 are normally in a non-contact state.
【００１９】また、移動軸19のフランジ部のシール部材
17と反対面には、永久磁石33が固着され、対向する位置
に設けられた電磁石35との間で反発力を作用し合うこと
が可能に構成されている。また、移動軸19とハウジング
11との間には、Ｏリング37が挿入されている。ハウジン
グ11の移動軸19の他端側にはポート39が開口し、シール
部材15，17を含む空間59には、ポート41，43が、それぞ
れ開口している。ポート43は、電磁開閉弁45を介してド
レンタンク47へ接続されている。Further, a seal member for the flange portion of the moving shaft 19
A permanent magnet 33 is fixedly attached to the surface opposite to the surface 17 so that a repulsive force can act on the electromagnet 35 provided at the opposing position. Also, the moving shaft 19 and the housing
An O-ring 37 is inserted between 11 and 11. A port 39 is opened at the other end of the moving shaft 19 of the housing 11, and ports 41 and 43 are opened in a space 59 including the seal members 15 and 17, respectively. The port 43 is connected to a drain tank 47 via an electromagnetic opening / closing valve 45.
【００２０】加工液供給源からの加工液はチェック弁49
を経てポート39へ導入されるよう、また、加圧空気供給
源からの空気は、電磁開閉弁51とチェック弁53を経てポ
ート39へ導入されるよう、さらに加圧空気供給源からの
空気は電磁開閉弁55を経て、ポート41へ導入されるよう
配管されている。移動軸19、シール部材15，17、回転軸
13、主軸９には、同軸の流体通路57が形成されており、
加工液や加圧空気を主軸９先端に装着した工具（図示せ
ず）へ送るようになっている。A check valve 49 is provided for the working fluid from the working fluid supply source.
So that the air from the pressurized air supply source is introduced into the port 39 via the electromagnetic opening / closing valve 51 and the check valve 53. It is arranged so as to be introduced into the port 41 via the electromagnetic opening / closing valve 55. Moving shaft 19, sealing members 15, 17, rotating shaft
13, the main shaft 9 is formed with a coaxial fluid passage 57,
The working fluid and the pressurized air are sent to a tool (not shown) attached to the tip of the main shaft 9.
【００２１】図３は、本発明ロータリジョイントの第２
実施例の構成を示す断面図で、第１実施例と同じ構成部
品は、同一符号を付けてある。ロータリジョイント１の
ハウジング11に軸受61を介して回転軸13を支持する構成
以外の構成、例えば、移動軸19の装着、一対のシール部
材15，17の配置、カラー25，27間に挟着したカーボンリ
ング29、圧縮ばね31による移動軸19の付勢、永久磁石33
と電磁石35との間の反発力発生機構、加工液、空気、ド
レンの配管、流体通路57の構成等は、第１実施例と同じ
なので説明を省く。FIG. 3 shows a second embodiment of the rotary joint of the present invention.
In the cross-sectional view showing the structure of the embodiment, the same components as those of the first embodiment are designated by the same reference numerals. Configurations other than the configuration in which the rotary shaft 13 is supported in the housing 11 of the rotary joint 1 via the bearing 61, for example, mounting of the moving shaft 19, arrangement of a pair of seal members 15 and 17, sandwiching between the collars 25 and 27 Carbon ring 29, compression spring 31 urges moving shaft 19, permanent magnet 33
The repulsive force generating mechanism between the electromagnet 35 and the electromagnet 35, the working liquid, the air, the drain piping, the configuration of the fluid passage 57, and the like are the same as those in the first embodiment, and a description thereof will be omitted.
【００２２】第２実施例は、電磁石35により圧縮ばね31
の彈性力に抗して反発力が移動軸19のフランジ部に作用
し、一対のシール部材15，17が接触している状態を示し
ている。第１実施例と異なる構成は、ロータリジョイン
ト１自体に軸受61を有し、回転軸13の一端を主軸９後端
に接続して用いるユニットタイプである点である。第１
実施例のロータリジョイント１は、それ自体に軸受を有
さないので、主軸装置のように外部の回転軸装置に装着
して、初めて機能するタイプである。In the second embodiment, an electromagnet 35 is used to compress the compression spring 31.
The repulsive force acts on the flange portion of the moving shaft 19 against the elastic force of the pair of seal members 15 and 17, and the pair of seal members 15 and 17 are in contact with each other. The structure different from that of the first embodiment is that the rotary joint 1 itself has a bearing 61, and one end of the rotary shaft 13 is connected to the rear end of the main shaft 9 to be used as a unit type. First
Since the rotary joint 1 of the embodiment does not have a bearing in itself, it is a type that functions only when it is attached to an external rotary shaft device like a main shaft device.
【００２３】次に、第１実施例及び第２実施例の作用に
ついて説明する。加工液も空気も流さないで主軸９を回
転させる場合は、電磁石35による反発力の発生はOFF
し、つまり、圧縮ばね31により、一対のシール部材15，
17は非接触状態とする。そうすれば、主軸が回転しても
シール部材の滑動はなく、よって摩耗もしない。Next, the operation of the first and second embodiments will be described. When rotating the spindle 9 without flowing machining fluid or air, the repulsive force generated by the electromagnet 35 is OFF.
That is, the compression spring 31 causes the pair of seal members 15,
17 is a non-contact state. Then, even if the main shaft rotates, the seal member does not slide and therefore does not wear.
【００２４】次に、加工液を流体通路57へ流通させる場
合は電磁石35により反発力を発生させ、シール部材15，
17を接触状態にし、加工液をポート39から導入する。加
工液は、流体通路57を経て主軸９先端方向へ供給され
る。このとき、一対のシール部材15，17間からの加工液
の漏洩は、ほとんどなく、若干の漏洩加工液は、電磁開
閉弁45を開にすることによってポート43からドレンタン
ク47へ回収される。一対のシール部材15，17の滑動接触
面間に、はみ出した加工液の潤滑作用により、シール部
材の滑動面の摩耗は最小限に抑えられる。Next, when the machining liquid is allowed to flow into the fluid passage 57, a repulsive force is generated by the electromagnet 35, and the sealing member 15,
17 is brought into contact, and the working fluid is introduced from port 39. The machining fluid is supplied toward the tip of the main shaft 9 through the fluid passage 57. At this time, there is almost no leakage of the machining fluid between the pair of seal members 15 and 17, and a slight leakage of the machining fluid is recovered from the port 43 to the drain tank 47 by opening the electromagnetic opening / closing valve 45. The sliding surface of the seal members is minimized due to the lubricating action of the working fluid protruding between the sliding contact surfaces of the pair of seal members 15 and 17.
【００２５】次に、加圧空気を流体通路57へ流通させる
場合は、電磁石の反発力をOFF し、移動軸19を圧縮ばね
31により図で右側へ移動させ、一対のシール部材15，17
間を非接触にする。電磁開閉弁45を閉にし、電磁開閉弁
51を開にする。すると、ポート39から加圧空気が導入さ
れ、シール部材15，17間から空間59内へ漏れるが、空間
59が加圧空気と同圧になれば、加圧空気は流体通路57を
通って主軸９先端方向へと供給される。このとき、電磁
開閉弁55を開にして電磁開閉弁51を閉にし、加圧空気を
空間59からシール部材15，17間の隙間を通して流体通路
に供給しても良いし、電磁開閉弁51，55共に開にして、
両経路から加圧空気を供給しても良い。Next, when the pressurized air is passed through the fluid passage 57, the repulsive force of the electromagnet is turned off and the moving shaft 19 is compressed by a compression spring.
Move to the right side in the figure by 31 and set a pair of seal members 15, 17
Make the space non-contact. Close the solenoid on-off valve 45
Open 51. Then, pressurized air is introduced from the port 39 and leaks from between the seal members 15 and 17 into the space 59.
When the pressure of 59 becomes equal to that of the pressurized air, the pressurized air is supplied to the tip of the main shaft 9 through the fluid passage 57. At this time, the electromagnetic on-off valve 55 may be opened and the electromagnetic on-off valve 51 may be closed to supply the pressurized air from the space 59 to the fluid passage through the gap between the seal members 15 and 17, or the electromagnetic on-off valve 51, 55 Open together,
Pressurized air may be supplied from both routes.
【００２６】電磁石のON，OFF 、電磁開閉弁45，51，55
の開閉、加工液の供給、停止の制御は、ＮＣ工作機械に
運転指令を与えるＮＣプログラムにより機械制御装置を
介して行う。なお、回転軸13及びカラー25，27に摺接す
るカーボンリング29により、加工液や空気が、回転軸13
とハウジング11との隙間から漏洩するのが防止される。
図１は、空気を導入している状態を示し、図３は、加工
液を導入している状態を示している。ON / OFF of electromagnet, solenoid on-off valves 45, 51, 55
Control of opening and closing, supply of machining fluid, and stop are performed through a machine control device by an NC program that gives an operation command to the NC machine tool. The carbon ring 29 slidingly contacting the rotating shaft 13 and the collars 25, 27 allows the working liquid and air to flow through the rotating shaft 13
Leakage from the gap between the housing 11 and the housing 11 is prevented.
FIG. 1 shows a state in which air is introduced, and FIG. 3 shows a state in which a working liquid is introduced.
【００２７】次に、図４の本発明のロータリジョイント
の第３実施例について説明する。このロータリジョイン
ト１は、第２実施例と同様、回転軸13を支持する軸受61
を有したユニットタイプである。第２実施例との相違点
は、カーボンリング29の代わりに、キャップ65とラビリ
ンスカラー67とで構成される微小隙間を利用したラビリ
ンスシールを用いて流体の漏洩を防止している点、及び
電磁石の反発力の大きさを可変・調節できることであ
る。また、ハウジング11の内周に固定された、ばね受け
63（週方向に３個等配）と移動軸19のフランジ部との間
に圧縮ばね31を配している。なお、流体は、ポート39か
ら導入している。Next, a third embodiment of the rotary joint of the present invention shown in FIG. 4 will be described. This rotary joint 1 has a bearing 61 that supports the rotary shaft 13 as in the second embodiment.
It is a unit type having. The difference from the second embodiment is that instead of the carbon ring 29, a labyrinth seal utilizing a minute gap composed of a cap 65 and a labyrinth collar 67 is used to prevent fluid leakage, and an electromagnet. It is possible to change and adjust the magnitude of the repulsive force of. In addition, a spring bearing fixed to the inner circumference of the housing 11
The compression spring 31 is arranged between 63 (three equally distributed in the week direction) and the flange portion of the moving shaft 19. The fluid is introduced from the port 39.
【００２８】作用は、加工液を供給する場合は、電磁石
35の反発力を圧縮ばね31の弾性力より若干、大きく設定
し、一対のシール部材15と17とが軽く接触するか、微小
間隙を保持するかの状態を作る。このようにすると、一
対のシール部材15，17の滑動面の摩耗が極めて小さくで
きる。このときの加工液の漏れは、電磁開閉弁45を開に
してドレンタンク47に回収すれば良い。加圧空気を供給
する場合は、電磁石35の反発力を弱またはOFF にして一
対のシール部材15，17間を非接触状態にし、電磁開閉弁
45を閉にすれば良い。なお、図４は、加圧空気を導入し
ている状態を示している。The function is to supply an electromagnet when a working fluid is supplied.
The repulsive force of 35 is set to be slightly larger than the elastic force of the compression spring 31 so that the pair of seal members 15 and 17 are in slight contact with each other or a minute gap is maintained. By doing so, the wear of the sliding surfaces of the pair of seal members 15, 17 can be made extremely small. The leakage of the machining fluid at this time may be collected in the drain tank 47 by opening the electromagnetic opening / closing valve 45. When supplying pressurized air, the repulsive force of the electromagnet 35 is weakened or turned off to bring the pair of seal members 15 and 17 into a non-contact state,
Close 45. Note that FIG. 4 shows a state in which pressurized air is being introduced.
【００２９】[0029]
【発明の効果】本発明は、以上説明したとおりであるの
で、 （１）ロータリジョイント内に気体を流通させる場合
は、一対のシール部材を非接触状態にするので、シール
部材の摩耗・発熱がなく、回転軸側を高速で回転させて
もシール部材の寿命を短くすることはない。また、気体
の漏れも、ほとんどない。 （２）ロータリジョイント内に液体を流通させる場合
は、一対のシール部材を接触状態にするので、液体の漏
洩はない。しかも、一対のシール部材間の滑動面に、そ
の液体が若干量しみ出し潤滑作用を行うので、シール部
材の摩耗も、ほとんど問題にならない。The present invention is as described above. (1) When gas is circulated in the rotary joint, the pair of seal members are brought into non-contact with each other, so that the seal members are not worn or generate heat. Even if the rotating shaft side is rotated at a high speed, the life of the seal member is not shortened. Also, there is almost no gas leakage. (2) When the liquid is circulated in the rotary joint, the pair of seal members are brought into contact with each other, so that the liquid does not leak. Moreover, since the liquid slightly oozes out on the sliding surface between the pair of seal members to perform a lubricating action, wear of the seal members does not pose a problem.
【００３０】（３）一対のシール部材滑動面の接触圧力
を可変にする接触圧力調節手段により、漏れが最小で、
かつ、摩耗も最小化できる。 （４）一つの構造で、液体流通用にも、気体流通用にも
使用できるロータリジョイントを提供することができ
る。 （５）回転軸支持用の軸受をハウジング内に備えたユニ
ット形のロータリジョイントばかりでなく、外部の回転
軸装置に取着して回転軸支持用の軸受をなくし、構造を
簡単化し、コンパクトにしたロータリジョイントも提供
できる。 等々、従来装置には期待することができない効果を奏す
る。(3) The contact pressure adjusting means for varying the contact pressure between the pair of seal member sliding surfaces minimizes leakage,
In addition, wear can be minimized. (4) With one structure, it is possible to provide a rotary joint that can be used for both liquid circulation and gas circulation. (5) Not only a unit type rotary joint in which a bearing for supporting the rotating shaft is provided in the housing, but also a bearing for supporting the rotating shaft is attached to an external rotating shaft device so that the structure is simplified and compact. We can also provide rotary joints. And so on, there are effects that cannot be expected from conventional devices.
【図１】本発明のロータリジョイントの第１実施例の断
面図である。FIG. 1 is a sectional view of a first embodiment of a rotary joint of the present invention.
【図２】図１のII−II線に沿う断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】本発明のロータリジョイントの第２実施例の断
面図である。FIG. 3 is a sectional view of a second embodiment of the rotary joint of the present invention.
【図４】本発明のロータリジョイントの第３実施例の断
面図である。FIG. 4 is a sectional view of a third embodiment of the rotary joint of the present invention.
１ ロータリジョイント ３ 主軸装置 ５ 主軸頭 ７ 軸受 ９ 主軸 11 ハウジング 13 回転軸 15，17 シール部材 19 移動軸 23 ピン 25，27 カラー 29 カーボンリング 31 圧縮ばね 33 永久磁石 35 電磁石 39，41，43 ポート 57 流体通路 61 軸受 67 ラビリンスカラー。 1 Rotary joint 3 Spindle device 5 Spindle head 7 Bearing 9 Spindle 11 Housing 13 Rotating shaft 15, 17 Sealing member 19 Moving shaft 23 Pin 25, 27 Color 29 Carbon ring 31 Compression spring 33 Permanent magnet 35 Electromagnet 39, 41, 43 Port 57 Fluid passage 61 Bearing 67 Labyrinth collar.
Claims (6)
る回転軸と、 前記ハウジング内に前記回転軸に対向配置され、かつ軸
線方向に移動可能に嵌着され、軸心部に流体通路を有す
る移動軸と、 前記回転軸と前記移動軸との対向面に設けられた一対の
シール部材と、を具備し、前記流体通路に気体を流通さ
せる場合は、前記一対のシール部材を非接触状態にする
ように構成したことを特徴とするロータリジョイント。1. A housing, a rotary shaft provided in the housing and having a fluid passage at an axial center thereof, arranged in the housing so as to face the rotary shaft, and fitted so as to be movable in an axial direction, A moving shaft having a fluid passage in the axial center portion, and a pair of seal members provided on the facing surfaces of the rotating shaft and the moving shaft, and in the case of passing gas through the fluid passage, the pair of A rotary joint, characterized in that the seal member of (1) is brought into a non-contact state.
る回転軸と、 前記ハウジング内に前記回転軸に対向配置され、かつ軸
線方向に移動可能に嵌着され、軸心部に流体通路を有す
る移動軸と、 前記回転軸と前記移動軸との対向面に設けられた一対の
シール部材と、 前記移動軸を軸線方向に往復動させ、前記一対のシール
部材を接触状態または非接触状態にする移動手段と、を
具備したことを特徴とするロータリジョイント。2. A housing, a rotary shaft which is provided in the housing and has a fluid passage at an axial center thereof, and which is arranged in the housing so as to face the rotary shaft, and is fitted so as to be movable in the axial direction, A moving shaft having a fluid passage in the shaft center, a pair of seal members provided on the facing surfaces of the rotating shaft and the moving shaft, and a reciprocating movement of the moving shaft in the axial direction, the pair of seal members And a moving means for bringing the contact state or the non-contact state into a rotary joint.
流通させる場合は、前記一対のシール部材を接触状態に
するよう構成した請求項２に記載のロータリジョイン
ト。3. The rotary joint according to claim 2, wherein the moving means is configured to bring the pair of seal members into contact with each other when the liquid is passed through the fluid passage.
シール部材の接触圧力を調節可能にする接触圧力調節手
段を具備してなる請求項３に記載のロータリジョイン
ト。4. The rotary joint according to claim 3, wherein the moving means comprises contact pressure adjusting means for adjusting the contact pressure of the pair of seal members in a contact state.
非回転部に固定され、前記回転軸は、前記外部の回転軸
装置の回転部に固定されてなる請求項１ないし４のいず
れか１項に記載のロータリジョイント。5. The housing according to claim 1, wherein the housing is fixed to a non-rotating portion of an external rotating shaft device, and the rotating shaft is fixed to a rotating portion of the external rotating shaft device. The rotary joint according to the item.
介して回転自在に支持されてなる請求項１ないし５のい
ずれか１項に記載のロータリジョイント。6. The rotary joint according to claim 1, wherein the rotary shaft is rotatably supported by the housing via a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5046077A JP2906007B2 (en) | 1993-02-12 | 1993-02-12 | Rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5046077A JP2906007B2 (en) | 1993-02-12 | 1993-02-12 | Rotary joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06241364A true JPH06241364A (en) | 1994-08-30 |
| JP2906007B2 JP2906007B2 (en) | 1999-06-14 |
Family
ID=12736935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5046077A Expired - Fee Related JP2906007B2 (en) | 1993-02-12 | 1993-02-12 | Rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2906007B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2741556A1 (en) * | 1995-11-23 | 1997-05-30 | Glyco Antriebstechnik Gmbh | TIGHTENING DEVICE WITH INTEGRATED TURNING SYSTEM OF A FLUID |
| JP2001050451A (en) * | 1999-07-10 | 2001-02-23 | Gat G Fuer Antriebstechnik Mbh | Rotary joint for alternating media |
| WO2006126284A1 (en) | 2005-05-26 | 2006-11-30 | Makino Milling Machine Co., Ltd. | Spindle device of machine tool |
| CN106594286A (en) * | 2016-12-13 | 2017-04-26 | 朱斌 | Dry friction rotary seal device for numerical control punching machine |
| WO2018007449A1 (en) * | 2016-07-07 | 2018-01-11 | Oerlikon Metco Ag, Wohlen | Powder rotary feedthrough having a purge chamber |
| KR20190110203A (en) * | 2018-03-20 | 2019-09-30 | 주식회사 더존테크 | Rotary joint |
-
1993
- 1993-02-12 JP JP5046077A patent/JP2906007B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2741556A1 (en) * | 1995-11-23 | 1997-05-30 | Glyco Antriebstechnik Gmbh | TIGHTENING DEVICE WITH INTEGRATED TURNING SYSTEM OF A FLUID |
| JP2001050451A (en) * | 1999-07-10 | 2001-02-23 | Gat G Fuer Antriebstechnik Mbh | Rotary joint for alternating media |
| KR100769376B1 (en) * | 1999-07-10 | 2007-10-22 | 게아테 게젤샤프트 푸르 안트리브스테크닉 엠베하 | Rotary duct for alternating media |
| JP4632489B2 (en) * | 1999-07-10 | 2011-02-16 | ゲーアーテー・ゲゼルシヤフト・フユール・アントリーブステヒニック・ミト・ベシユレンクテル・ハフツング | Rotary joint for alternating media |
| WO2006126284A1 (en) | 2005-05-26 | 2006-11-30 | Makino Milling Machine Co., Ltd. | Spindle device of machine tool |
| US7972096B2 (en) | 2005-05-26 | 2011-07-05 | Makino Milling Machine Co., Ltd. | Spindle device of machine tool |
| WO2018007449A1 (en) * | 2016-07-07 | 2018-01-11 | Oerlikon Metco Ag, Wohlen | Powder rotary feedthrough having a purge chamber |
| KR20190031258A (en) * | 2016-07-07 | 2019-03-25 | 오엘리콘 멧코 아게, 볼렌 | Powder rotating feedthrough with purge chamber |
| JP2019527800A (en) * | 2016-07-07 | 2019-10-03 | エリコン メテコ アクチェンゲゼルシャフト、ヴォーレン | Powder rotary feedthrough with purge chamber |
| CN106594286A (en) * | 2016-12-13 | 2017-04-26 | 朱斌 | Dry friction rotary seal device for numerical control punching machine |
| KR20190110203A (en) * | 2018-03-20 | 2019-09-30 | 주식회사 더존테크 | Rotary joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2906007B2 (en) | 1999-06-14 |
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| LAPS | Cancellation because of no payment of annual fees |