JPH0418728Y2 - - Google Patents
Info
- Publication number
- JPH0418728Y2 JPH0418728Y2 JP4516386U JP4516386U JPH0418728Y2 JP H0418728 Y2 JPH0418728 Y2 JP H0418728Y2 JP 4516386 U JP4516386 U JP 4516386U JP 4516386 U JP4516386 U JP 4516386U JP H0418728 Y2 JPH0418728 Y2 JP H0418728Y2
- Authority
- JP
- Japan
- Prior art keywords
- main shaft
- hole
- cylindrical member
- drawbar
- axis
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Gripping On Spindles (AREA)
- Turning (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Jigs For Machine Tools (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は例えばマシニングセンタ等の工作機械
の主軸構造の改良に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in the main shaft structure of a machine tool such as a machining center.
従来、例えばマシニングセンタ等の工作機械の
主軸構造は、第３図に示す如く、ツールをロツク
するクランプ機構と、ツールをアンロツクするア
ンクランプ機構と、ツールとクランプ、アンクラ
ンプ部の清掃をするエア供給装置と、主軸を回転
させるモータ等の駆動機構等が一体となつて組立
られていた。即ち、主軸１先端にはツールホルダ
２が取付けられ、該ツールホルダ２の後端のプル
スタツド２ａが、主軸１孔内のコレツト３先端部
でロツクされ、同じく主軸１の孔内に挿入され該
コレツトを取付けたドローバ４を主軸１の後端側
へ付勢する皿バネ５によつてロツクされている。
Conventionally, the main spindle structure of a machine tool such as a machining center, as shown in Figure 3, has a clamp mechanism that locks the tool, an unclamp mechanism that unlocks the tool, and an air supply that cleans the tool, clamp, and unclamp section. The device and a drive mechanism such as a motor that rotates the main shaft were assembled together. That is, a tool holder 2 is attached to the tip of the spindle 1, and a pull stud 2a at the rear end of the tool holder 2 is locked at the tip of a collet 3 in the hole of the spindle 1, which is also inserted into the hole of the spindle 1 and pulls the collector. It is locked by a disc spring 5 that urges the drawbar 4 to which the drawbar is attached toward the rear end of the main shaft 1.
また、主軸１のドローバ４の後方主軸軸線上に
はシリンダ６が設けられ、該シリンダ内には中心
軸線上で螺合したロツド７と共に軸方向に摺動可
能なピストン８が挿嵌されている。そして、圧油
の供給により該ピストン８が軸方向へ摺動する
と、前記ロツド７の先端が前記ドローバ４に当接
し、該ドローバ４を前記皿バネ５の弾力に抗して
軸方向へ押圧し、前記コレツト３を弛めプルスタ
ツド２ａをアンロツクするように構成されてい
る。さらに、前記ロツド７と前記ドローバ４の中
心にはエア供給用の孔が貫通状に穿設されてお
り、エア供給装置の指令により、前記ロツド７が
前記ドローバ４に密着した際、前記コレツト３と
プルスタツド２ａの取付部に清掃用のエアブロー
が行なわれる。また、主軸１の回転駆動は、主軸
１後方に前記シリンダ６等から構成されるアンク
ランプ機構が配置されるため、主軸１の後端部に
プーリ１ａをキー止めし、主軸１下方のコラムの
壁９に駆動モータ１０を固定して、その出力軸１
０ａにプーリ１０ｂを嵌着し、前記主軸１のプー
リ１ａと該駆動モータ１０のプーリ１０ｂとの間
に数条のベルト１１を掛け渡して伝動させてい
る。 Further, a cylinder 6 is provided on the rear main shaft axis of the drawbar 4 of the main shaft 1, and a piston 8 that is slidable in the axial direction with a rod 7 screwed together on the central axis is inserted into the cylinder. . When the piston 8 slides in the axial direction due to the supply of pressure oil, the tip of the rod 7 comes into contact with the drawbar 4 and presses the drawbar 4 in the axial direction against the elasticity of the disc spring 5. , is configured to loosen the collet 3 and unlock the pull stud 2a. Furthermore, an air supply hole is perforated through the center of the rod 7 and the drawbar 4, and when the rod 7 comes into close contact with the drawbar 4 according to a command from the air supply device, the collector 3 Cleaning air is then blown to the mounting portion of the pull stud 2a. In addition, since an unclamping mechanism composed of the cylinder 6 and the like is arranged behind the main shaft 1, the rotational drive of the main shaft 1 is performed by locking the pulley 1a to the rear end of the main shaft 1, and by locking the pulley 1a to the rear end of the main shaft 1. A drive motor 10 is fixed to a wall 9, and its output shaft 1
A pulley 10b is fitted to the shaft 10a, and several belts 11 are passed between the pulley 1a of the main shaft 1 and the pulley 10b of the drive motor 10 to transmit power.
しかしながら、従来のように主軸１と切離した
位置に駆動モータ１０を設け、プーリ１０ｂ，１
ａを介してベルト１１により主軸１に動力を伝え
る構造では、伝動効率が悪く電力ロスの原因とな
ると共に、駆動モータ１０を取付けるために主軸
１の下方に大きなスペースを必要としていた。
However, as in the past, the drive motor 10 is provided at a position separated from the main shaft 1, and the pulleys 10b, 1
In the structure in which power is transmitted to the main shaft 1 by the belt 11 via the belt 11, the transmission efficiency is poor and causes power loss, and a large space is required below the main shaft 1 to mount the drive motor 10.
本考案は上記の問題点を解決するために提案さ
れたもので、従来通り、クランプ、アンクランプ
機構を内部に組込んだ状態で、主軸を直接駆動す
べく、主軸後方の固定部に駆動モータを設け駆動
方式の改良を図つた主軸構造を提供するものであ
る。 This invention was proposed in order to solve the above problems.In order to directly drive the spindle, the drive motor is attached to the fixed part at the rear of the spindle, while the clamping and unclamping mechanism is built in as before. The present invention provides a main shaft structure with an improved drive system.
上記の問題点を解決するため、本考案はハウジ
ングに回転自在に軸承された主軸と、該主軸の軸
線に沿つて穿設された貫通穴と、該貫通穴に連通
し一端に形成された工具挿着部と、前記貫通穴内
に摺動可能に挿嵌され一端に工具を弾性力で牽引
クランプするクランプ部を有するドローバとから
成る主軸構造において、前記主軸後端に一体的に
設けられた第１の回転伝達部材と、該回転伝達部
材と主軸軸線方向にのみ摺動可能に係合し中央部
に主軸軸線と直交する軸を設けると共に一端外周
縁部に突起を形成した円筒部材と、該円筒部材を
収納する貫通穴を有すると共に一端に前記円筒部
材の突起部と当接する当接部を設けた往復移動部
材と、該往復移動部材を軸線方向に移動する駆動
源と、主軸後方に回転可能に挿嵌され該主軸内の
ドローバ貫通穴に連通する流体供給穴を有する回
転継手と、前記ハウジング壁面に固定され主軸軸
線上に突出した出力軸に設けられ前記円筒部材と
主軸軸線方向にのみ摺動可能に係合する第２の回
転伝達部材とから成ることを特徴とする。
In order to solve the above problems, the present invention includes a main shaft rotatably supported in a housing, a through hole drilled along the axis of the main shaft, and a tool formed at one end communicating with the through hole. In the main shaft structure comprising an insertion part and a drawbar that is slidably inserted into the through hole and has a clamp part at one end for pulling and clamping the tool with elastic force, a drawbar is provided integrally at the rear end of the main shaft. a cylindrical member that is slidably engaged with the rotation transmitting member only in the direction of the spindle axis, has a shaft perpendicular to the spindle axis in the center, and has a protrusion on the outer peripheral edge of one end; a reciprocating member having a through hole for accommodating a cylindrical member and having a contact portion at one end that contacts a protrusion of the cylindrical member; a drive source for moving the reciprocating member in an axial direction; and a main shaft rotating rearward. a rotary joint having a fluid supply hole that can be inserted and communicated with the drawbar through hole in the main shaft; and a rotary joint that is provided on the output shaft that is fixed to the housing wall surface and protrudes on the main shaft axis, and that is provided only in the axial direction of the main shaft and the cylindrical member. and a second rotation transmission member slidably engaged with each other.
上記構成を採ることにより、クランプ、アンク
ランプ機構を内部に組込んだ状態で主軸を駆動モ
ータによつて直接駆動することができる。 By adopting the above configuration, the main shaft can be directly driven by the drive motor with the clamping and unclamping mechanism incorporated inside.
以下、本考案の一実施例を図面に基づいて詳細
に説明する。
Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.
第１図はアンクランプ機構が働いていない状態
の本考案の主軸構造を示す断面図、第２図はアン
クランプ機構が働いている状態の本考案の主軸構
造を示す断面図である。尚、第３図と同じ構成部
材には同一符号を付し、説明は省略する。 FIG. 1 is a sectional view showing the main shaft structure of the present invention with the unclamping mechanism not working, and FIG. 2 is a sectional view showing the main shaft structure of the present invention with the unclamping mechanism working. Components that are the same as those in FIG. 3 are given the same reference numerals, and explanations thereof will be omitted.
第１図において、主軸１後方の固定部（図示せ
ず）に、該主軸１の中心線の延長上に出力軸１２
ａをもつ駆動モータ１２が取付けられている。該
出力軸１２ａ先端には外周のスプラインを刻設し
た伝達部品１３がシユパンリング１４を介してボ
ルトにより固定されている。前記伝達部品１３の
外周のスプラインには同じく内周にスプラインを
刻設した長尺の円筒部材１５の一端が係合してい
る。そして、該円筒部材１５の一端と前記シユパ
ンリングの間に常時該円筒部材１５を主軸１方向
へ付勢するバネ１６が介装されている。前記円筒
部材１５の他端（主軸１側）のスプラインには主
軸１にキー止めされ外周にスプラインを刻設した
伝達部材１７が係合されている。 In FIG. 1, an output shaft 12 is attached to a fixed part (not shown) at the rear of the main shaft 1 on an extension of the center line of the main shaft 1.
A drive motor 12 with a is installed. A transmission component 13 having a spline formed on the outer periphery is fixed to the tip of the output shaft 12a with a bolt via a shuppan ring 14. One end of a long cylindrical member 15, which also has splines carved on its inner circumference, is engaged with the splines on the outer circumference of the transmission component 13. A spring 16 is interposed between one end of the cylindrical member 15 and the shuppan ring to constantly bias the cylindrical member 15 in the direction of the main shaft 1. A transmission member 17, which is keyed to the main shaft 1 and has a spline carved on its outer periphery, is engaged with the spline at the other end (main shaft 1 side) of the cylindrical member 15.
前記伝達部品１３及び円筒部材１５を囲む外方
にはコラムの壁１８に穿設された貫通穴に嵌合さ
れたハウジング１９が設けられると共に、該ハウ
ジング１９の内壁をシリンダとし、該シリンダ内
には軸方向に移動可能な段付きのスリーブ状のピ
ストン２０が挿嵌されている。該ピストン２０の
先端（主軸１側）にはナツト２１が螺合し、該ナ
ツト２１により前記円筒部材１５の他端（主軸１
側）に設けられた鍔部１５ａを押圧可能としてい
る。 A housing 19 is provided on the outside surrounding the transmission part 13 and the cylindrical member 15, and is fitted into a through hole formed in the column wall 18. A stepped sleeve-shaped piston 20 that is movable in the axial direction is inserted into the piston 20 . A nut 21 is screwed into the tip of the piston 20 (main shaft 1 side), and the nut 21 connects the other end of the cylindrical member 15 (main shaft 1 side) with the nut 21.
The flange 15a provided on the side) can be pressed.
また、前記円筒部材１５の中央には常時主軸１
内のドローバ４端部に当接すべく主軸軸線と直交
する方向にストツパピン２２が設けられている。 Further, a main shaft 1 is always provided at the center of the cylindrical member 15.
A stopper pin 22 is provided in a direction perpendicular to the main shaft axis so as to come into contact with the end portion of the inner drawbar 4 .
なお、主軸１にキー止めされた伝達部材１７の
隣接位置には、エア供給用の孔が径方向に穿設さ
れたカバー２３がコラム３０にアダプター３１を
介して設けられ、該カバー２３内にはシール部材
２５を装着したリング２４が主軸側に設けられ、
該エア供給用の孔は主軸１の片側の肉厚部を貫通
してドローバ４の中心の孔に接続されている。 At a position adjacent to the transmission member 17 that is keyed to the main shaft 1, a cover 23 with air supply holes bored in the radial direction is provided on the column 30 via an adapter 31. A ring 24 equipped with a seal member 25 is provided on the main shaft side,
The air supply hole passes through the thick wall portion on one side of the main shaft 1 and is connected to the center hole of the drawbar 4.
次に作用について説明する。 Next, the effect will be explained.
駆動モータ１２の回転は、その出力軸１２ａか
ら回転伝達機構を構成している伝達部品１３、円
筒部材１５、伝達部材１７を介して主軸１に伝え
られる。 The rotation of the drive motor 12 is transmitted from its output shaft 12a to the main shaft 1 via a transmission component 13, a cylindrical member 15, and a transmission member 17 that constitute a rotation transmission mechanism.
一方、アンクランプ機構は次のように働く。ハ
ウジング１９の内壁に設けたシリンダへ圧油が供
給されると、第２図に示す如く、ピストン２０は
軸方向に摺動し、ピストン２０の先端に固定した
ナツト２１が前記円筒部材１５の他端（主軸１
側）に設けられた鍔部１５ａを押圧して軸方向に
摺動させる。この円筒部材１５の摺動により、ド
ローバ４後端部に当接している円筒部材１５に設
けられたストツパピン２２によつてドローバ４が
押圧され、皿バネ５の付勢力に抗してコレツト３
を弛めて、ツールホルダ２のプルスタツド２ａを
アンロツクする。 On the other hand, the unclamp mechanism works as follows. When pressure oil is supplied to the cylinder provided on the inner wall of the housing 19, the piston 20 slides in the axial direction, as shown in FIG. End (spindle 1
side) to slide in the axial direction. Due to this sliding of the cylindrical member 15, the drawbar 4 is pressed by the stopper pin 22 provided on the cylindrical member 15 that is in contact with the rear end of the drawbar 4, and the collet 3 is pushed against the biasing force of the disc spring 5.
Loosen the pull stud 2a of the tool holder 2 to unlock it.
前記コレツト３とプルスタツド２ａの取付部の
清掃用エアは、駆動モータ１２が主軸１の中心軸
線上に取付けられているため、従来の如く、ドロ
ーバ４の延長線上にエア供給用の孔を中心に穿設
したロツド７を設けることができないため、主軸
１にキー止めされた前記伝達部材１７の隣接位置
に、エア供給用の孔を径方向に穿設したカバー２
３およびシール部材２５を装着したリング２４を
介して、主軸１の片側の肉厚部を貫通してドロー
バ４の中心孔に送られる。 Since the drive motor 12 is installed on the central axis of the main shaft 1, the air for cleaning the attachment part of the collet 3 and the pull stud 2a is supplied from the air supply hole on the extension line of the drawbar 4, as in the conventional case. Since it is not possible to provide a drilled rod 7, a cover 2 is provided with an air supply hole drilled in the radial direction adjacent to the transmission member 17 keyed to the main shaft 1.
3 and a ring 24 equipped with a sealing member 25, it passes through the thick part on one side of the main shaft 1 and is sent to the center hole of the drawbar 4.
以上説明した如く、本考案はクランプ、アンク
ランプ機構を内部に組込んだ状態で主軸を直接駆
動すべく主軸後方の固定部に駆動モータを取付け
ることにより、伝動効率がよく電力ロスを防ぐこ
とができると共に、主軸の下方のスペースを有効
利用することができる等の効果を奏する。
As explained above, the present invention improves transmission efficiency and prevents power loss by attaching the drive motor to the fixed part behind the spindle to directly drive the spindle with the clamping and unclamping mechanism incorporated inside. At the same time, the space below the main shaft can be used effectively.
第１図はアンクランプ機構が働いていない状態
の本考案の主軸構造を示す断面図、第２図はアン
クランプ機構が働いている状態の本考案の主軸構
造を示す断面図、第３図は従来の主軸構造を示す
断面図である。
１……主軸、２……ツールホルダ、４……ドロ
ーバ、５……皿バネ、６……シリンダ、７……ロ
ツド、８……ピストン、１０……駆動モータ、１
１……ベルト、１２……駆動モータ、１３……伝
達部品、１５……円筒部材、１５ａ……鍔部、１
７……伝達部材、１９……ハウジング、２０……
ピストン、２２……ストツパピン。
Figure 1 is a cross-sectional view showing the main shaft structure of the present invention with the unclamping mechanism not working, Figure 2 is a cross-sectional view showing the main shaft structure of the present invention with the unclamping mechanism working, and Figure 3 is a cross-sectional view showing the main shaft structure of the present invention with the unclamping mechanism working. FIG. 3 is a sectional view showing a conventional main shaft structure. 1... Main shaft, 2... Tool holder, 4... Drawbar, 5... Belleville spring, 6... Cylinder, 7... Rod, 8... Piston, 10... Drive motor, 1
DESCRIPTION OF SYMBOLS 1... Belt, 12... Drive motor, 13... Transmission part, 15... Cylindrical member, 15a... Flange part, 1
7...Transmission member, 19...Housing, 20...
Piston, 22...Stoppin.
Claims (1)
主軸の軸線に沿つて穿設された貫通穴と、該貫通
穴に連通し一端に形成された工具挿着部と、前記
貫通穴内に摺動可能に挿嵌され一端に工具を弾性
力で牽引クランプするクランプ部を有するドロー
バとから成る主軸構造において、前記主軸後端に
一体的に設けられた第１の回転伝達部材と、該回
転伝達部材と主軸軸線方向にのみ摺動可能に係合
し中央部に主軸軸線と直交する軸を設けると共に
一端外周縁部に突起を形成した円筒部材と、該円
筒部材を収納する貫通穴を有すると共に一端に前
記円筒部材の突起部と当接する当接部を設けた往
復移動部材と、該往復移動部材を軸線方向に移動
する駆動源と、主軸後方に回転可能に挿嵌され該
主軸内のドローバ貫通穴に連通する流体供給穴を
有する回転継手と、前記ハウジング壁面に固定さ
れ主軸軸線上に突出した出力軸に設けられ前記円
筒部材と主軸軸線方向にのみ摺動可能に係合する
第２の回転伝達部材とから成ることを特徴とする
主軸構造。 A main shaft rotatably supported by the housing, a through hole drilled along the axis of the main shaft, a tool insertion part communicating with the through hole and formed at one end, and slidable into the through hole. and a drawbar having a clamp portion at one end for pulling and clamping a tool with elastic force; a first rotation transmitting member integrally provided at the rear end of the main shaft; A cylindrical member that is slidably engaged only in the direction of the spindle axis and has a shaft orthogonal to the spindle axis in the center and a protrusion formed on the outer peripheral edge of one end, and has a through hole for housing the cylindrical member and has a through hole at one end. a reciprocating member provided with a contact portion that abuts the protrusion of the cylindrical member; a drive source that moves the reciprocating member in the axial direction; and a drawbar through hole in the main shaft that is rotatably inserted behind the main shaft. a rotary joint having a fluid supply hole communicating with the cylindrical member; and a second rotation transmission, which is provided on an output shaft fixed to the housing wall surface and protrudes on the main shaft axis, and slidably engages with the cylindrical member only in the main shaft axis direction. A main shaft structure characterized by consisting of members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4516386U JPH0418728Y2 (en) | 1986-03-27 | 1986-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4516386U JPH0418728Y2 (en) | 1986-03-27 | 1986-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62156402U JPS62156402U (en) | 1987-10-05 |
| JPH0418728Y2 true JPH0418728Y2 (en) | 1992-04-27 |
Family
ID=30863653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4516386U Expired JPH0418728Y2 (en) | 1986-03-27 | 1986-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0418728Y2 (en) |
-
1986
- 1986-03-27 JP JP4516386U patent/JPH0418728Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62156402U (en) | 1987-10-05 |
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