JP2502341Y2 - Rotary tool holder - Google Patents
Rotary tool holderInfo
- Publication number
- JP2502341Y2 JP2502341Y2 JP1992016476U JP1647692U JP2502341Y2 JP 2502341 Y2 JP2502341 Y2 JP 2502341Y2 JP 1992016476 U JP1992016476 U JP 1992016476U JP 1647692 U JP1647692 U JP 1647692U JP 2502341 Y2 JP2502341 Y2 JP 2502341Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotary tool
- main shaft
- tool holder
- oil seal
- ring
- 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 - Lifetime
Links
Landscapes
- Jigs For Machine Tools (AREA)
- Turning (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は、工作機械をはじめ各
種の加工機械の回転軸の先端に設けられ、先端に回転工
具を取り付ける回転工具ホルダに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tool holder which is provided at the tip of a rotary shaft of a machine tool and various types of processing machines and has a rotary tool attached to the tip.
【０００２】[0002]
【従来の技術】現在、多くの工作機械の主軸には、図２
に示すように回転工具ホルダＡを備えている。即ち、回
転工具ホルダにおいて主軸１は機械本体１０のハウジン
グ２に組み込まれた転がり軸受３を介して回転自在に支
承されている。さらに該主軸１の先端には回転工具取り
付け穴１５にドリル、エンドミル等の回転工具を挿入
し、ナット１１によりこれを締めつけて主軸１に固定し
ている。さらに、ハウジング２の端面に組み込まれた側
蓋１２に内装されたオイルシール４が主軸１の外周面６
と摺接し、側蓋１２の内周面１３と主軸１の外周面６と
の間に形成された微小すきまｗと相まって外部からの塵
埃の浸入防止と、潤滑油の漏洩防止をはかっている。ま
た、オイルシール４のリップ５と接触する主軸１の外周
面６に硬質被膜を施して摩耗の進行を遅らせる対策もな
された。2. Description of the Related Art Currently, many machine tools have spindles shown in FIG.
The rotary tool holder A is provided as shown in FIG. That is, in the rotary tool holder, the main shaft 1 is rotatably supported via the rolling bearing 3 incorporated in the housing 2 of the machine body 10. Further, a rotary tool such as a drill or an end mill is inserted into the rotary tool mounting hole 15 at the tip of the main shaft 1 and is fastened to the main shaft 1 by tightening it with a nut 11. Further, the oil seal 4 incorporated in the side lid 12 incorporated in the end surface of the housing 2 is provided with the outer peripheral surface 6 of the main shaft 1.
It is in sliding contact with the inner surface 13 of the side lid 12 and the outer peripheral surface 6 of the main shaft 1 together with the minute clearance w to prevent dust from entering from the outside and leakage of lubricating oil. In addition, a countermeasure is taken to delay the progress of wear by applying a hard coating to the outer peripheral surface 6 of the main shaft 1 that contacts the lip 5 of the oil seal 4.
【０００３】[0003]
【考案が解決しようとする課題】しかし、回転工具の加
工中に生ずる構成刃先などを含む硬質粉塵や、回転工具
として研削砥石を使用した場合には、切削油中に混入し
た多様な研磨粉塵などが空気中に浮遊しているので、回
転工具ホルダの使用環境は極めて厳しく、このために主
軸１が高速回転すると上記オイルシール４のリップ部５
と主軸１の外周面６との接触部の摩耗が激しくなり、シ
ール効果が急激に低下して長期間の使用に耐えない。さ
らに、これらの研磨粉などの塵埃は装置内部に組み込ま
れた歯車などの伝達機構にも悪影響を与える。また、主
軸１の外周面６に硬質被膜を施しても、一旦摩耗が進行
してしまうと、その後の対策は困難であり修復が不可能
となる。[Problems to be Solved by the Invention] However, hard dust including constituent cutting edges, etc., generated during machining of a rotary tool, and various grinding dust mixed in cutting oil when a grinding wheel is used as a rotary tool. Is suspended in the air, the working environment of the rotary tool holder is extremely severe. Therefore, when the spindle 1 rotates at high speed, the lip portion 5 of the oil seal 4 is
And the outer peripheral surface 6 of the main shaft 1 is abraded at a contact portion, and the sealing effect is sharply reduced, so that it cannot be used for a long time. Further, the dust such as the polishing powder adversely affects the transmission mechanism such as a gear incorporated inside the apparatus. Further, even if a hard coating is applied to the outer peripheral surface 6 of the main shaft 1, once the wear has progressed, it is difficult to take countermeasures thereafter and repair is impossible.
【０００４】[0004]
【課題を解決するための手段】この考案は、かかる課題
を解決すべくなされたものであって、ハウジングに回転
可能に支承された主軸と、該主軸の先端に形成された回
転工具取り付け穴と、該取り付け穴に取り付けられた回
転工具の締めつけを行うナットと、ハウジング内部に塵
埃の浸入を防止するオイルシールとを備えた回転工具ホ
ルダであって、主軸のオイルシールとの摺接部に該主軸
とは別体のリングを嵌着したことによって、オイルシー
ルとの摩耗を防止すると共に、一旦摩耗が生じても硬質
材料製リングを容易に交換可能としたものである。しか
も、リング７の外周面に硬質被膜を施し、耐摩耗性を向
上させたのである。The present invention has been made to solve the above problems, and includes a main shaft rotatably supported by a housing, and a rotary tool mounting hole formed at the tip of the main shaft. A rotary tool holder comprising a nut for tightening a rotary tool mounted in the mounting hole and an oil seal for preventing dust from entering the housing, wherein the sliding contact portion with the oil seal of the spindle is By fitting a ring separate from the main shaft, wear with the oil seal is prevented, and even if wear occurs, the hard material ring can be easily replaced. Moreover, a hard coating is applied to the outer peripheral surface of the ring 7 to improve wear resistance.
【０００５】[0005]
【作用】主軸１を高速回転して加工を行っていくと、次
第に主軸１の摩耗が進行していくが、摩耗の度合いが大
となって使用不可能となった場合は、一旦機械を停止
し、摩耗したリングを外し、予め製造してあった硬質材
料製リング７を嵌め代えて再び稼働を開始する。[Function] When the spindle 1 is rotated at a high speed for machining, the spindle 1 gradually wears. However, if the degree of wear becomes large and the spindle cannot be used, the machine is temporarily stopped. Then, the worn ring is removed, the ring 7 made of a hard material that has been manufactured in advance is replaced, and the operation is started again.
【０００６】[0006]
【実施例】次に、この考案に係る回転工具ホルダの実施
例を図１について説明する。主軸１は機械本体９のハウ
ジング２に組み込まれた転がり軸受３を介して回転自在
に支承されており、先端に形成された回転工具取り付け
穴１５にドリル、エンドミル等の回転工具を挿入し、こ
れをナット１１で締めつけて固定している。さらに、ハ
ウジング２の端面に組み込まれた側蓋１２にはオイルシ
ール４が内装されている。主軸１の外周面６にはリング
７が嵌着され、該リング７は前記オイルシール４のリッ
プ部５と摺接している。リング７の外周面には、Ｔｉ
Ｎ，ＴｉＣなどの硬質材をコーティングしたり、あるい
は硬質クロムメッキを施して耐摩耗性を向上させてい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the rotary tool holder according to the present invention will be described with reference to FIG. The main shaft 1 is rotatably supported via a rolling bearing 3 incorporated in a housing 2 of a machine body 9. A rotary tool such as a drill or an end mill is inserted into a rotary tool mounting hole 15 formed at the tip of the main shaft 1, Is fixed by tightening the nut 11. Further, an oil seal 4 is installed in the side lid 12 incorporated in the end surface of the housing 2. A ring 7 is fitted on the outer peripheral surface 6 of the main shaft 1, and the ring 7 is in sliding contact with the lip portion 5 of the oil seal 4. On the outer peripheral surface of the ring 7, Ti
A hard material such as N or TiC is coated or hard chrome plating is applied to improve wear resistance.
【０００７】さらに、リング７の内周面は主軸１の外周
面に形成された周溝１４に嵌挿されたＯリングと接して
おり、ハウジング内部に油、水、塵埃などの浸入が防止
されてリング７が主軸１と一緒に回転可能となる。かく
て、側蓋１２の内周面１３と主軸１の外周面６との間に
形成された微小すきまｗと相まって外部からの塵埃の浸
入防止と、潤滑油の漏洩防止が可能となる。Further, the inner peripheral surface of the ring 7 is in contact with an O-ring fitted in a peripheral groove 14 formed on the outer peripheral surface of the main shaft 1 to prevent oil, water, dust and the like from entering the inside of the housing. The ring 7 can rotate together with the spindle 1. Thus, in combination with the minute clearance w formed between the inner peripheral surface 13 of the side lid 12 and the outer peripheral surface 6 of the main shaft 1, it is possible to prevent dust from entering from the outside and prevent leakage of lubricating oil.
【０００８】[0008]
【効果】この考案は上記のように、ハウジングに回転可
能に支承された主軸と、該主軸の先端に形成された回転
工具取り付け穴と、該取り付け穴に取り付けられた回転
工具の締めつけを行うナットと、ハウジング内部に塵埃
の浸入を防止するオイルシールとを備えた回転工具ホル
ダであって、オイルシールのリップと摺接部する主軸の
部位には、主軸とは別体のリングを嵌着したので、高速
回転する軸におけるオイルシールのリップとの接触部に
おけるオイルシール部の摩耗部分の修復は容易になる。
また、該リングは修理交換部品として事前に準備できる
ために、主軸全体の取扱いなどによる作業の困難さはな
く、これに要する多額の経費を節約できるなど多くの顕
著な効果を奏する。As described above, according to the present invention, the main shaft rotatably supported by the housing, the rotary tool mounting hole formed at the tip of the main shaft, and the nut for tightening the rotary tool mounted in the mounting hole. A rotary tool holder having a housing and an oil seal for preventing dust from entering the housing, wherein a ring separate from the main shaft is fitted to a portion of the main shaft in sliding contact with a lip of the oil seal. Therefore, it becomes easy to repair the worn portion of the oil seal portion at the contact portion with the lip of the oil seal on the shaft that rotates at high speed.
Further, since the ring can be prepared as a repair / replacement part in advance, there is no difficulty in the work due to handling of the entire main spindle, and a large amount of cost required for this can be saved, which has many remarkable effects.
【図１】この考案の実施例の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】従来品の断面図である。FIG. 2 is a cross-sectional view of a conventional product.
１ 主軸 ２ ハウジング ４ オイルシール ７ リング ９ 回転工具 1 Spindle 2 Housing 4 Oil seal 7 Ring 9 Rotating tool
Claims (2)
と、該主軸の先端に形成された回転工具取り付け穴と、
該取り付け穴に取り付けられた回転工具の締めつけを行
うナットと、ハウジング内部に塵埃の浸入を防止するオ
イルシールとを備えた回転工具ホルダにおいて、主軸の
オイルシールとの摺接部に該主軸とは別体のリングを嵌
着したことを特徴とする回転工具ホルダ。1. A main shaft rotatably supported by a housing, and a rotary tool mounting hole formed at a tip of the main shaft,
In a rotary tool holder including a nut for tightening a rotary tool attached to the mounting hole and an oil seal for preventing dust from entering the housing, the main shaft is slidably contacted with the oil seal of the main shaft. A rotary tool holder characterized in that a separate ring is fitted.
されている請求項１記載の回転工具ホルダ。2. The rotary tool holder according to claim 1, wherein the ring has a hard coating on its outer peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992016476U JP2502341Y2 (en) | 1992-02-21 | 1992-02-21 | Rotary tool holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992016476U JP2502341Y2 (en) | 1992-02-21 | 1992-02-21 | Rotary tool holder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0567438U JPH0567438U (en) | 1993-09-07 |
| JP2502341Y2 true JP2502341Y2 (en) | 1996-06-19 |
Family
ID=11917334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992016476U Expired - Lifetime JP2502341Y2 (en) | 1992-02-21 | 1992-02-21 | Rotary tool holder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2502341Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7000365B2 (en) | 2019-01-31 | 2022-01-19 | ファナック株式会社 | Wrist structure of robot, robot, and manufacturing method of wrist structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04183555A (en) * | 1990-11-16 | 1992-06-30 | N T Tool Kk | Oiling structure for work machine |
-
1992
- 1992-02-21 JP JP1992016476U patent/JP2502341Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04183555A (en) * | 1990-11-16 | 1992-06-30 | N T Tool Kk | Oiling structure for work machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0567438U (en) | 1993-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960130 |