JPH051792A - Rotary joint - Google Patents
Rotary jointInfo
- Publication number
- JPH051792A JPH051792A JP17743491A JP17743491A JPH051792A JP H051792 A JPH051792 A JP H051792A JP 17743491 A JP17743491 A JP 17743491A JP 17743491 A JP17743491 A JP 17743491A JP H051792 A JPH051792 A JP H051792A
- Authority
- JP
- Japan
- Prior art keywords
- rotating member
- rotational member
- contact
- liquid
- bearing
- 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.)
- Pending
Links
Landscapes
- Joints Allowing Movement (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はロータリジョイントに関
し、より詳しくは非回転部材から回転部材への給液部分
に特徴を有す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, and more particularly to a rotary joint characterized by a portion for supplying liquid from a non-rotating member to a rotating member.
【０００２】[0002]
【従来の技術】高速で回転しかつ刃先から切削液を吐出
しながら加工するガンドリルのような工具には、通常、
図２に示したようなロータリジョイントを用いて刃先部
分へ切削液を供給するようにしている。2. Description of the Related Art Tools such as gun drills that rotate at high speed and discharge cutting fluid from the cutting edge are usually
The rotary joint as shown in FIG. 2 is used to supply the cutting fluid to the cutting edge portion.
【０００３】この種のロータリジョイントは、ポートａ
を備えた筒型の非回転部材ｂの内底部にスプリングｃに
よって外方へ付勢された当接板ｄを設け、その外面にス
ピンドルｅと結合する回転部材ｆの内端を当接させて、
ポートａからの切削液を回転部材ｆの軸心に通すように
構成されている。This type of rotary joint has a port a.
A cylindrical non-rotating member b provided with a contact plate d that is urged outward by a spring c is provided on the inner bottom part of the cylindrical non-rotating member b, and an inner end of a rotating member f coupled to a spindle e is brought into contact with the outer surface thereof. ,
The cutting fluid from the port a is configured to pass through the shaft center of the rotating member f.
【０００４】ところがこのような従来のロータリジョイ
ントでは、回転部材ｆが２つのベアリングｇ、ｇにより
強固に支持された状態で高速回転する反面、当接板ｄは
スプリングｃによって不安定に保持されて静止している
ため、長期の使用によってはこれらの間の相対的な動き
により不均一な摩耗が生じ、その結果、両者の隙間から
漏れ出した切削液がベアリングｇ内に流れ込んでグリー
スを溶かし出し、その機能を喪失させるほか、最終的に
はベアリングｇを焼付かせてしまうといった不具合を生
じさせる。However, in such a conventional rotary joint, the rotating member f rotates at a high speed while being firmly supported by the two bearings g, while the contact plate d is unstablely held by the spring c. Since it is stationary, uneven movement occurs due to relative movement between them due to long-term use, and as a result, cutting fluid leaking from the gap between the two flows into the bearing g to dissolve the grease. In addition to the loss of its function, it eventually causes a problem that the bearing g is seized.
【０００５】[0005]
【発明が解決しようとする課題】本発明はこのような問
題に鑑みてなされたもので、その目的とするところは、
回転部材と非回転部材との間の不均一な摩耗を極力抑え
るとともに、これらの間から例え液体が漏れ出したとし
ても、ベアリング部材に何らの不都合をも生じさせるこ
とのない新たなロータリジョイントを提供することにあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to:
A new rotary joint that suppresses uneven wear between the rotating member and the non-rotating member as much as possible and does not cause any inconvenience to the bearing member even if liquid leaks from between them To provide.
【０００６】[0006]
【課題を解決するための手段】すなわち本発明はこのよ
うな課題を達成するためのロータリジョイントとして、
非回転部材に設けた通液孔の外端と、回転部材に設けた
通液孔の内端に、それぞれ各通液孔を囲繞する可及的小
径の当接リングを固定して、これらの当接リング同士を
当接させた状態で非回転部材と回転部材を軸受けにより
結合する一方、非回転部材と回転部材のそれぞれに、一
面に環状のリブを突出形成した板状部材を固定し、これ
らの環状リブ同士が互いに噛合うように、かつこれらの
環状リブの間に若干の間隙が形成されるように両板状部
材を対向位置させるようにして、例え当接リングの隙間
から液が漏れ出したとしても、この液がラビリンス作用
によって軸受部に流入しないようにしたものである。[Means for Solving the Problems] That is, the present invention provides a rotary joint for achieving the above object.
A contact ring of the smallest possible diameter surrounding each liquid passage hole is fixed to the outer end of the liquid passage hole provided in the non-rotating member and the inner end of the liquid passage hole provided in the rotating member. While the contact rings are in contact with each other, the non-rotating member and the rotating member are coupled by bearings, while the non-rotating member and the rotating member are each fixed with a plate-shaped member having an annular rib projectingly formed on one surface thereof. The two plate-shaped members are placed so as to face each other so that these annular ribs mesh with each other, and a slight gap is formed between these annular ribs. Even if it leaks out, this liquid is prevented from flowing into the bearing portion due to the labyrinth action.
【０００７】[0007]
【実施例】そこで以下に図示した実施例について説明す
る。図１は本発明の一実施例を示したものである。図に
おいて符号１は、ベアリングを介して回転部材２０と結
合した有底筒状をなす非回転部材で、この非回転部材１
には、その基部２の中心にポート３に連通した摺動孔４
が軸心方向に穿設されていて、ここには、内部に介装し
たスプリング５によって外方へ付勢された当接板６が摺
動自在に嵌合わされている。EXAMPLES The examples shown below will be described below. FIG. 1 shows an embodiment of the present invention. In the figure, reference numeral 1 is a bottomed cylindrical non-rotating member that is connected to a rotating member 20 via a bearing.
Has a sliding hole 4 communicating with the port 3 at the center of its base 2.
Is pierced in the axial direction, and a contact plate 6 biased outward by a spring 5 provided inside is slidably fitted therein.
【０００８】この当接板６は回転部材２０に切削液等の
液体を供給することができるよう中心に通孔７が設けら
れ、またこの内端面には、可及的に小さな相対速度をも
って回転部材と摺接するように、耐摩耗材により形成さ
れた小径の当接リング８が通孔７を囲繞するようにして
固定されており、さらに内面から露出したフランジ部９
の周縁寄りの部分は、回転部材１の内端面に植設したボ
ルト１０により回転不能に止着されている。The contact plate 6 is provided with a through hole 7 at the center so that a liquid such as cutting fluid can be supplied to the rotary member 20, and the inner end face of the contact plate 6 rotates at a relative speed as small as possible. A small-diameter abutment ring 8 made of a wear-resistant material is fixed so as to be in sliding contact with the member so as to surround the through hole 7, and a flange portion 9 exposed from the inner surface.
The portion near the peripheral edge of is fixed non-rotatably by a bolt 10 planted on the inner end surface of the rotating member 1.
【０００９】一方、回転部材２０は、非回転部材１とガ
ンドリルなどの工具を結合して、工具の刃先部分に切削
液等の液体を供給するための部材で、この回転部材２０
は、内外２つの取付け部材１１、１３をもって非回転部
材１の口端に固定した単一のベアリング１５を介して非
回転部材１の軸心部に回転自在に取付けられている。On the other hand, the rotating member 20 is a member for connecting the non-rotating member 1 and a tool such as a gun drill and supplying a liquid such as cutting fluid to the cutting edge of the tool.
Is rotatably attached to the shaft center of the non-rotating member 1 via a single bearing 15 fixed to the mouth end of the non-rotating member 1 by two mounting members 11 and 13 inside and outside.
【００１０】この回転部材２０は軸心に通孔２１が設け
られ、その内端には通孔２１を囲繞するようにして非回
転部材１側の当接リング８と当接する耐摩耗材よりなる
小径の当接リング２２が固定され、また外端はスピンド
ル３０との結合部２３として構成されている。This rotating member 20 has a through hole 21 formed in the axial center thereof, and a small diameter made of a wear-resistant material that abuts the abutting ring 8 on the non-rotating member 1 side so as to surround the through hole 21 at its inner end. The contact ring 22 is fixed, and the outer end of the contact ring 22 is configured as a connecting portion 23 with the spindle 30.
【００１１】ところで図中符号２５は、両当接リング
８、２２の間から漏れ出した切削液がベアリング１５の
配設部へ流入するのを抑えるようにした液止め用ディス
クで、この液止め用ディスク２５は、非回転部材１に設
けた内側取付け部材１１の内面に対向するようにして回
転部材２０上に固定され、さらにその対向外面に突出形
成した複数の環状リブ２６を、内側取付け部材１１の対
向面に形成した複数の環状リブ１２との間に狭い間隙を
持たせて互いに噛合わせるように位置させることによっ
て、両プレート１１、２５間に切削液の流入を排するジ
グザグ状の迷路を形成するように構成されている。By the way, reference numeral 25 in the drawing is a liquid stop disk for preventing the cutting liquid leaking from between the contact rings 8 and 22 from flowing into the arrangement portion of the bearing 15. The disk 25 is fixed on the rotating member 20 so as to face the inner surface of the inner mounting member 11 provided on the non-rotating member 1, and further has a plurality of annular ribs 26 projectingly formed on the outer surface facing the inner mounting member 11. A zigzag labyrinth that drains the inflow of cutting fluid between the plates 11 and 25 by arranging them so as to mesh with each other with a narrow gap between them and a plurality of annular ribs 12 formed on the opposing surfaces of 11 Are configured to form.
【００１２】なお図中符号１７は、非回転部材１の筒状
部に形成した切削液除去用の排液口を示しており、また
１８は、非回転部材１の摺動孔４と回転部材２０との間
の気密を保つパッキングを示している。Reference numeral 17 in the drawing denotes a drainage port formed in the cylindrical portion of the non-rotating member 1 for removing cutting fluid, and 18 denotes the sliding hole 4 of the non-rotating member 1 and the rotating member. 20 shows a packing that keeps airtightness with 20.
【００１３】このように構成された装置において、いま
スピンドル３０とともに回転部材２０が例えば６０００
ｒｐｍの高速度で回転すると、静止状態にある当接板６
とこの回転部材２０の端部との間には大きな摺動摩擦が
生じるが、上述したようにこれらの両端は通孔７、２１
を囲繞するきわめて小径の当接リング８、２２と接して
いるため、両者の摩耗は可能な限り低く抑えられ、しか
も、スプリング５に付勢された当接板６に対して単一の
ベアリング１５により支持された回転部材２０が、内側
取付け部材１１と液止め用ディスク２５との間に形成さ
れた隙間に相当する量だけ軸方向に変位するため、仮に
両当接リング８、２２に不均一な摩耗が生じたとして
も、これらは常に密着した状態で切削液を漏出させるこ
となく当接する。In the apparatus constructed as described above, the rotary member 20 is now, for example, 6000 together with the spindle 30.
The contact plate 6 in a stationary state when rotated at a high speed of rpm
A large sliding friction is generated between the rotary member 20 and the end of the rotary member 20, but as described above, these ends have through holes 7, 21.
Since they are in contact with the contact rings 8 and 22 having a very small diameter surrounding them, the wear of both is kept as low as possible, and a single bearing 15 is attached to the contact plate 6 urged by the spring 5. Since the rotating member 20 supported by the axial displacement is axially displaced by an amount corresponding to the gap formed between the inner mounting member 11 and the liquid stopping disk 25, the contact rings 8 and 22 are not uniform. Even if such abrasion occurs, these are always in close contact with each other and come into contact with each other without leaking the cutting fluid.
【００１４】またこの動作中、両当接リング８、２２の
間から切削液が漏れて、これが液止め用ディスク２５の
内面に回り込んだとしても、このディスク２５の内側取
付け部材１１の対向面には環状リブ２６、１２によって
ジグザグ状の迷路が形成され、しかも液止め用ディスク
２５の内面には、中心から外周方向に向けての遠心力が
作用しているため、切削液はこの内面を経てベアリング
１５のもとへ流れ込むことはできず、ベアリング１５の
持つ転がり摩擦は良好に保持されて回転部材２０の高速
回転を長期に亙って確保する。Further, during this operation, even if the cutting fluid leaks from between the abutment rings 8 and 22 and wraps around the inner surface of the fluid stopping disk 25, the inner surface of the inner mounting member 11 of the disk 25 faces the surface. A zigzag labyrinth is formed by the annular ribs 26 and 12, and the inner surface of the liquid stopping disk 25 is subjected to a centrifugal force from the center toward the outer peripheral direction. After that, the bearing 15 cannot flow into the bearing 15, and the rolling friction of the bearing 15 is well maintained, so that the high speed rotation of the rotary member 20 is secured for a long period of time.
【００１５】なお、以上はガンドリルに適用したロータ
リジョイントの例によって本発明を説明したものである
が、他のロータリジョイントにも本発明を適用すること
ができることは云うまでもない。Although the present invention has been described with reference to an example of a rotary joint applied to a gun drill, it goes without saying that the present invention can be applied to other rotary joints.
【００１６】[0016]
【発明の効果】以上述べたように本発明によれば、通液
孔を囲繞するようにして設けた可及的小径の各当接リン
グを介して、非回転部材と回転部材を当接させたので、
これらの当接リング間に生じる摺動速度を小さくしてこ
れらの摩耗を可能な限り抑えることができる。As described above, according to the present invention, the non-rotating member and the rotating member are brought into contact with each other through the contact rings of the smallest possible diameter provided so as to surround the liquid passage hole. So
The sliding speed generated between these abutment rings can be reduced to suppress these abrasions as much as possible.
【００１７】しかも、非回転部材と回転部材のそれぞれ
に、一面に環状のリブを突出形成した板状部材を設け、
これらの環状リブ同士が互いに噛合うようにして、若干
の間隙を設けて対向位置させたので、仮に当接リング間
から液が漏れ出しても、両板状部材間に形成されるジグ
ザグ状の間隙と回転に伴う遠心力の作用により、液が軸
受部へ流入することが確実に抑えられて、円滑な軸受作
用を長期に亙って維持することができるとともに、これ
ら両板状材間の間隙に相当する分回転部材の軸方向変位
を可能となして、当接リングに例え不均一な摩耗が生じ
たとしても、これら両当接リングを常に密接させた状態
で当接させることができる。Moreover, the non-rotating member and the rotating member are respectively provided with plate-shaped members having annular ribs protruding from one surface thereof.
Since these annular ribs are meshed with each other and positioned so as to face each other with a slight gap, even if the liquid leaks from between the contact rings, the zigzag shape formed between both plate-shaped members is formed. The action of the centrifugal force due to the gap and rotation reliably prevents the liquid from flowing into the bearing portion, and the smooth bearing action can be maintained for a long period of time. The rotation member can be displaced in the axial direction by the amount corresponding to the gap, and even if the contact rings are unevenly worn, the contact rings can be contacted in a state in which they are always in close contact with each other. .
【図１】本発明の一実施例を示す装置の断面図である。FIG. 1 is a sectional view of an apparatus showing an embodiment of the present invention.
【図２】従来装置の一例を示した断面図である。FIG. 2 is a cross-sectional view showing an example of a conventional device.
１ 非回転部材 ６ 当接板 ８ 当接リング １１ 内側取付け部材 １５ ベアリング ２０ 回転部材 ２２ 当接リング ２５ 液止め用ディスク ３０ スピンドル 1 Non-Rotating Member 6 Contact Plate 8 Contact Ring 11 Inner Mounting Member 15 Bearing 20 Rotating Member 22 Contact Ring 25 Liquid Stop Disk 30 Spindle
Claims (1)
転部材に設けた通液孔の内端に、それぞれ該各通液孔を
囲繞する可及的小径の当接リングを固定して、該当接リ
ング同士を当接させた状態で上記非回転部材と上記回転
部材を軸受けにより結合する一方、上記非回転部材と上
記回転部材のそれぞれに、一面に環状のリブを突出形成
した板状部材を固定し、該環状リブ同士が互いに噛合う
ように、かつ該各環状リブ間に若干の間隙が形成される
ように上記両板状部材を対向位置させたことを特徴とす
るロータリジョイント。Claims: 1. It is possible to surround each of the liquid passage holes at an outer end of the liquid passage hole provided in the non-rotating member and an inner end of the liquid passage hole provided in the rotating member. The non-rotating member and the rotating member are coupled by a bearing in a state where the small-diameter abutting ring is fixed and the abutting rings are brought into contact with each other, while the non-rotating member and the rotating member are respectively provided on one surface. A plate-shaped member having annular ribs protruding therefrom is fixed, and the plate-shaped members are positioned so as to face each other so that the annular ribs mesh with each other and a slight gap is formed between the annular ribs. This is a rotary joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17743491A JPH051792A (en) | 1991-06-20 | 1991-06-20 | Rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17743491A JPH051792A (en) | 1991-06-20 | 1991-06-20 | Rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH051792A true JPH051792A (en) | 1993-01-08 |
Family
ID=16030881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17743491A Pending JPH051792A (en) | 1991-06-20 | 1991-06-20 | Rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH051792A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004316775A (en) * | 2003-04-16 | 2004-11-11 | Eagle Ind Co Ltd | Rotary joint |
| KR100769376B1 (en) * | 1999-07-10 | 2007-10-22 | 게아테 게젤샤프트 푸르 안트리브스테크닉 엠베하 | Rotary duct for alternating media |
| JP2010270892A (en) * | 2009-05-25 | 2010-12-02 | Nakamura Tome Precision Ind Co Ltd | Rotary joint |
| KR101456296B1 (en) * | 2007-12-27 | 2014-11-04 | 두산인프라코어 주식회사 | A joint structure for a cutting oil in a rear part of a spindle for a machining apparatus |
| JP2020133749A (en) * | 2019-02-19 | 2020-08-31 | 株式会社北川鉄工所 | Rotary cylinder |
-
1991
- 1991-06-20 JP JP17743491A patent/JPH051792A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100769376B1 (en) * | 1999-07-10 | 2007-10-22 | 게아테 게젤샤프트 푸르 안트리브스테크닉 엠베하 | Rotary duct for alternating media |
| JP2004316775A (en) * | 2003-04-16 | 2004-11-11 | Eagle Ind Co Ltd | Rotary joint |
| JP4531346B2 (en) * | 2003-04-16 | 2010-08-25 | イーグル工業株式会社 | Rotary joint |
| KR101456296B1 (en) * | 2007-12-27 | 2014-11-04 | 두산인프라코어 주식회사 | A joint structure for a cutting oil in a rear part of a spindle for a machining apparatus |
| JP2010270892A (en) * | 2009-05-25 | 2010-12-02 | Nakamura Tome Precision Ind Co Ltd | Rotary joint |
| JP2020133749A (en) * | 2019-02-19 | 2020-08-31 | 株式会社北川鉄工所 | Rotary cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20020703 |