JPH0663805A - Tool unclamping device of main spindle of machine tool - Google Patents

Tool unclamping device of main spindle of machine tool

Info

Publication number
JPH0663805A
JPH0663805A JP21990192A JP21990192A JPH0663805A JP H0663805 A JPH0663805 A JP H0663805A JP 21990192 A JP21990192 A JP 21990192A JP 21990192 A JP21990192 A JP 21990192A JP H0663805 A JPH0663805 A JP H0663805A
Authority
JP
Japan
Prior art keywords
tool
cam
presser lever
spindle
link
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
Application number
JP21990192A
Other languages
Japanese (ja)
Inventor
Toshiaki Miki
俊明 三木
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.)
Osaka Kiko Co Ltd
Original Assignee
Osaka Kiko Co 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 Osaka Kiko Co Ltd filed Critical Osaka Kiko Co Ltd
Priority to JP21990192A priority Critical patent/JPH0663805A/en
Publication of JPH0663805A publication Critical patent/JPH0663805A/en
Pending legal-status Critical Current

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  • Gripping On Spindles (AREA)

Abstract

PURPOSE:To reduce an operation time and noise by electrically and mechanically moving, by means of an electric motor and a cam, a presser lever for actuating a draw bar, which clamps and unclamps a tool fitted to the main spindle of a machine tool. CONSTITUTION:A link mechanism 50 consisting of a first link 46 and a second link 47 is coupled to the free edge of a presser lever 21 that presses a draw bar, and this link mechanism 50 is disposed in a pivotable manner by means of a cam 31 which is rotated by an electric motor 30. A tension spring 54 is also attached to the presser lever 21, whereby the presser lever 21 becomes constantly separable from a draw 6. When a tool is replaced, the cam 31 is rotated, and the presser lever 21 is depressed by the link mechanism 50 against the tension spring 54. Then, the draw bar 6 is moved in an unclamping direction, so that the tool may unclamped.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、工作機械の主軸に装
着した工具を交換する際に、主軸に保持させた工具を自
動的に弛めて解放させる工具弛緩装置に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool loosening device for automatically loosening and releasing a tool held on a spindle when replacing the tool mounted on the spindle of a machine tool.

【0002】[0002]

【従来の技術】多数の工具を収納した工具マガジン及び
工具交換装置(ATC)を備えた工作機械は、工具交換
装置にて工作機械の主軸に装着された工具を自動的に交
換するようになっている。そのため、このような工作機
械の主軸は、工具を自動的に着脱できる構造となってい
る。
2. Description of the Related Art A machine tool equipped with a tool magazine accommodating a large number of tools and a tool changer (ATC) automatically changes the tool mounted on the spindle of the machine tool by the tool changer. ing. Therefore, the spindle of such a machine tool has a structure in which a tool can be automatically attached and detached.

【0003】例えば図5に示す様に、主軸(1)は軸受
け(2)(3)を介して主軸ヘッド(4)に回転自在に
支持され、主軸ヘッド(4)の上端に設けられた主軸モ
ータ(5)にて回転駆動させられる。この主軸(1)は
中空構造となっており、内部にドローバー(6)を軸方
向にスライド自在に挿入し、ドローバー(6)の下端に
工具ホルダー(7)のプルスタッド(10)をチャック
するコレット(11)を設けている。コレット(11)
にはボール(12)が装着されており、上方に引かれた
状態ではコレット(11)内のボール(12)が主軸
(1)の内壁面に押されて内側に突出し、ボール(1
2)にてプルスタッド(10)を保持する。また下方に
押出されると、コレット(11)が主軸(1)内に形成
された逃げ溝(13)内に入り、ボール(12)への外
力がなくなり、プルスタッド(10)を解放する構造と
なっている。
For example, as shown in FIG. 5, a spindle (1) is rotatably supported by a spindle head (4) via bearings (2) and (3), and a spindle provided at an upper end of the spindle head (4). It is rotationally driven by a motor (5). The main shaft (1) has a hollow structure, the draw bar (6) is slidably inserted in the inside, and the pull stud (10) of the tool holder (7) is chucked at the lower end of the draw bar (6). A collet (11) is provided. Collet (11)
A ball (12) is mounted on the ball, and when pulled upward, the ball (12) in the collet (11) is pushed by the inner wall surface of the spindle (1) and protrudes inward,
Hold the pull stud (10) at 2). Further, when pushed downward, the collet (11) enters the clearance groove (13) formed in the main shaft (1), the external force on the ball (12) disappears, and the pull stud (10) is released. Has become.

【0004】ドローバー(6)は周囲に多数装着した皿
ばね(14)(14)…にて常に上方へ引かれてコレッ
ト(11)を閉じるようになっており、ドローバー
(6)の上方に設けられた工具弛緩装置(15)にて下
方へ押出されてプルスタッド(10)を解放し、工具ホ
ルダー(7)を主軸(1)から僅かに突出させるように
なっている。
The drawbar (6) is always pulled upward by a plurality of disc springs (14) (14) mounted around it to close the collet (11). The drawbar (6) is provided above the drawbar (6). The tool slackening device (15) is pushed downward to release the pull stud (10), and the tool holder (7) is slightly projected from the spindle (1).

【0005】工具弛緩装置(15)は、実公平1−44
245号公報にて開示されているように、ドローバー
(6)の上端に支持ブロック(16)を取付け、その両
端を主軸(1)に形成された長穴(17)から突出さ
せ、突出端の後面にリング状の受圧部材(20)を取付
け、主軸ヘッド(4)の内壁面に一端を揺動自在に支持
させた押えレバー(21)を前記受圧部材(20)の上
面に対向配置させ、押えレバー(21)を主軸ヘッド
(4)に取付けたシリンダ機構(22)にて揺動させる
ようになっている(図6参照)。シリンダ機構(22)
は、押えレバー(21)を揺動させる油圧シリンダ(2
3)と、この油圧シリンダ(23)を増速させる第1エ
アーシリンダ(24)並びに油圧シリンダ(23)を増
圧させる第2エアーシリンダ(25)とを備えている。
The tool loosening device (15) has
As disclosed in Japanese Patent No. 245, the support block (16) is attached to the upper end of the drawbar (6), and both ends thereof are projected from the elongated hole (17) formed in the main shaft (1) to A ring-shaped pressure receiving member (20) is attached to the rear surface, and a holding lever (21) whose one end is swingably supported on the inner wall surface of the spindle head (4) is arranged to face the upper surface of the pressure receiving member (20). The presser lever (21) is swung by a cylinder mechanism (22) attached to the spindle head (4) (see FIG. 6). Cylinder mechanism (22)
Is a hydraulic cylinder (2 that swings the presser lever (21).
3) and a first air cylinder (24) for increasing the speed of the hydraulic cylinder (23) and a second air cylinder (25) for increasing the pressure of the hydraulic cylinder (23).

【0006】上記構成の工具弛緩装置(15)は、通常
は、油圧シリンダ(23)が短縮して押えレバー(2
1)を引張り、押えレバー(21)の押圧部(26)を
受圧部材(20)から僅かに離してドローバー(6)に
荷重をかけないようになっている。そして工具交換を行
う時には、第1エアーシリンダ(24)にて油圧シリン
ダ(23)を速く伸長動作させて押えレバー(21)の
押圧部(26)を受圧部材(20)の上面に当接させ、
次に第2エアーシリンダ(25)にて油圧シリンダ(2
3)を増圧させて押えレバー(21)を押し下げ、受圧
部材(20)及び支持ブロック(16)を介してドロー
バー(6)を押出し、コレット(11)によるプルスタ
ッド(10)の保持を解除し、続いてコレット(11)
の内端面(27)にてプルスタッド(10)を押し、工
具ホルダー(7)を主軸(1)から僅かに突出させる。
In the tool slackening device (15) having the above structure, the hydraulic cylinder (23) is usually shortened so that the pressing lever (2) is
1) is pulled and the pressing portion (26) of the pressing lever (21) is slightly separated from the pressure receiving member (20) so that the load is not applied to the draw bar (6). When exchanging tools, the hydraulic cylinder (23) is quickly extended by the first air cylinder (24) to bring the pressing portion (26) of the presser lever (21) into contact with the upper surface of the pressure receiving member (20). ,
Next, in the second air cylinder (25), the hydraulic cylinder (2
3) is increased to push down the presser lever (21), the draw bar (6) is pushed out via the pressure receiving member (20) and the support block (16), and the holding of the pull stud (10) by the collet (11) is released. And then collet (11)
The pull stud (10) is pushed on the inner end face (27) of the tool holder (7) to slightly project from the spindle (1).

【0007】工具ホルダー(7)は工具交換装置の交換
アーム(図示せず)に保持され、主軸(1)から引き抜
かれて工具マガジンへ収納される。そして、次に使用す
る工具を備えた工具ホルダー(7)のテーパ部(28)
及びプルスタッド(10)が主軸(1)内に挿入される
と、油圧シリンダ(23)を短縮動作させて、押えレバ
ー(21)を復帰させ、ドローバー(6)への押さえ力
を解除する。すると、ドローバー(6)は皿ばね(1
4)にて引き戻されて、コレット(11)にてプルスタ
ッド(10)を掴み、かつこれを引き込んで工具ホルダ
ー(7)のテーパ部(28)を主軸(1)に固定し、工
具交換を完了する。
The tool holder (7) is held by a changing arm (not shown) of the tool changing device, pulled out from the spindle (1) and stored in the tool magazine. And the taper part (28) of the tool holder (7) equipped with the tool to be used next
When the pull stud (10) is inserted into the main shaft (1), the hydraulic cylinder (23) is shortened, the presser lever (21) is returned, and the pressing force on the draw bar (6) is released. Then, the drawbar (6) is
4) The pull stud (10) is pulled back by the collet (11), and the pull stud (10) is pulled in to fix the taper part (28) of the tool holder (7) to the main spindle (1) to change the tool. Complete.

【0008】[0008]

【発明が解決しようとする課題】上記工具弛緩装置(1
5)は、ドローバー(6)を下方へ押える押えレバー
(21)を揺動させるために、油圧シリンダ(23)や
第1エアーシリンダ(24)、第2エアーシリンダ(2
5)等からなるシリンダ機構(22)を用いているた
め、油圧シリンダ(23)に油圧を供給するための油圧
供給装置や第1エアーシリンダ(24)及び第2エアー
シリンダ(25)へエアーを供給するためのエアー供給
装置が必要で、配管も面倒で、設備が複雑・大型化す
る。また、油洩れやエアー洩れ等に対する定期的なメン
テナンスも必要であった。さらに、油圧供給装置やエア
ー供給装置は、油圧やエアーを所定の圧力に設定して供
給するために、工具交換の有無に拘らず常時運転させて
おかなければならず、エネルギー消費量が多く、騒音の
問題もある。
DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
5) refers to a hydraulic cylinder (23), a first air cylinder (24), and a second air cylinder (2) in order to swing a presser lever (21) that presses the draw bar (6) downward.
Since the cylinder mechanism (22) including 5) is used, air is supplied to the hydraulic pressure supply device for supplying hydraulic pressure to the hydraulic cylinder (23) and the first air cylinder (24) and the second air cylinder (25). An air supply device is required to supply air, and the piping is cumbersome, making the equipment complicated and large. Also, regular maintenance for oil leaks and air leaks was necessary. Further, the hydraulic pressure supply device and the air supply device have to be constantly operated regardless of whether or not the tool is changed in order to set the hydraulic pressure and the air at a predetermined pressure and supply the energy, and the energy consumption is large. There is also the problem of noise.

【0009】この発明は、電気モータとカムを用いて工
具交換時にのみ動作させるようにした工具弛緩装置を提
供しようとするものである。
The present invention is intended to provide a tool loosening device which is operated only when a tool is replaced by using an electric motor and a cam.

【0010】[0010]

【課題を解決するための手段】この発明は、工作機械の
主軸内にスライド自在に挿入され、下端に設けられたコ
レットにて前記主軸に装着される工具ホルダーのプルス
タッドを掴み、かつ主軸内に設けた皿ばねにて常に上方
へ引かれて前記プルスタッドを引き込み、前記工具ホル
ダーを前記主軸に固定するドローバーを、前記皿ばねに
抗して押し下げて前記プルスタッドを解放させる工具弛
緩装置であって、前記主軸を保持している主軸ヘッドに
一端が揺動自在に取付けられ、前記ドローバーを押える
押えレバーと、前記押えレバーの上方に配置されて押え
レバーの他端を上下動するリンク機構と、前記主軸ヘッ
ドに取付けられ、前記押えレバーの他端を上方へ引張
り、前記ドローバーから離す引張りばねと、前記リンク
機構と摺接したカムと、前記カムを回転させ、カム面に
て前記リンクを揺動させて、前記ドローバーを押し下げ
る電動モータとで構成したものである。
SUMMARY OF THE INVENTION According to the present invention, a pull stud of a tool holder mounted on a spindle is grasped by a collet provided at a lower end of the spindle, which is slidably inserted into the spindle of a machine tool, and With a tool loosening device for pulling the pull studs by always pulling upwards with a disc spring provided in, and pushing down a draw bar for fixing the tool holder to the spindle against the disc springs to release the pull studs. A presser lever having one end swingably attached to a main spindle head holding the main shaft, for pressing the drawbar, and a link mechanism arranged above the press lever and vertically moving the other end of the press lever. A tension spring attached to the spindle head, which pulls the other end of the pressing lever upward and separates it from the drawbar, and a cam slidably contacting the link mechanism. , Rotates the cam, by swinging the link at the cam surface, which is constituted by an electric motor to push down the drawbar.

【0011】[0011]

【作用】上記工具弛緩装置は、電動モータを回転させて
カムを回転させると、カムに形成されたカム面にてリン
ク機構を押えて動作させ、このリンク機構にて押えアー
ムを押し下げ、さらにドローバーを押し下げて、プルス
タッドを解放させる。このように、工具交換にのみ電動
モータを回転させればよく、エネルギー消費量の無駄が
なく、メンテナンスの必要もない。また工具交換時以外
は電動モータを回さなくてよく、騒音も抑えられる。
When the electric motor is rotated and the cam is rotated, the tool loosening device presses the link mechanism by the cam surface formed on the cam to operate, and the link mechanism pushes down the pressing arm, and further the drawbar. Push down to release the pull stud. In this way, it is sufficient to rotate the electric motor only for tool exchange, there is no waste of energy consumption, and there is no need for maintenance. Also, the electric motor does not have to be turned except when changing tools, and noise can be suppressed.

【0012】[0012]

【実施例】以下、この発明の実施例を図1乃至図4を参
照して説明する。但し図5に示す従来技術と同一構成部
材には同一符号を付して、説明は省略する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. However, the same components as those of the conventional technique shown in FIG.

【0013】図1及び図2に示す様に、工具弛緩装置は
ドローバー(6)の上端に取付けられた受圧部材(2
0)を押し下げる押えレバー(21)を、電動モータ
(30)及びカム(31)にて揺動させるようにしたも
のである。
As shown in FIGS. 1 and 2, the tool loosening device includes a pressure receiving member (2) attached to an upper end of a draw bar (6).
The holding lever (21) for pushing down (0) is swung by the electric motor (30) and the cam (31).

【0014】即ち、主軸ヘッド(4)の壁面に、押えレ
バー(21)より上方に支持フレーム(32)を取付
け、この支持フレーム(32)の上壁(33)に電動モ
ータ(30)を取付け、両側の立壁(34)(34)間
に回転軸(35)を軸受け(36)(37)を介して回
転自在に取付けてある。電動モータ(30)の出力軸
(40)には第1傘歯車(41)を取付け、この第1傘
歯車(41)を上壁(33)に軸受け(42)を介して
回転自在に支持させてある。一方、回転軸(35)の一
方の端部に第1傘歯車(41)と噛み合う第2傘歯車
(43)を取付けてあり、電動モータ(30)にて回転
軸(35)を回転させるようになっている。回転軸(3
5)には中央部にカム(31)を取付けてある。
That is, the support frame (32) is attached to the wall surface of the spindle head (4) above the pressing lever (21), and the electric motor (30) is attached to the upper wall (33) of the support frame (32). A rotary shaft (35) is rotatably mounted between the standing walls (34) (34) on both sides via bearings (36) (37). A first bevel gear (41) is attached to the output shaft (40) of the electric motor (30), and the first bevel gear (41) is rotatably supported by the upper wall (33) via a bearing (42). There is. On the other hand, a second bevel gear (43) meshing with the first bevel gear (41) is attached to one end of the rotating shaft (35), and the rotating shaft (35) is rotated by the electric motor (30). It has become. Rotation axis (3
A cam (31) is attached to the central portion of 5).

【0015】カム(31)は周面をカム面(44)とす
る平面カムを用いており、カム面(44)は図3に示す
様に、a点が最も低く、b点及びc点が高くなってお
り、b点からc点迄は同じ高さで連続している。
As the cam (31), a flat cam having a peripheral surface as the cam surface (44) is used. As shown in FIG. 3, the cam surface (44) has the lowest point a, and points b and c. The height is high and points b to c are continuous at the same height.

【0016】カム(31)の下方には、支軸(45)に
て揺動自在に連結した第1リンク(46)と第2リンク
(47)とからなるリンク機構(50)を設け、第1リ
ンク(46)の一端を支持フレーム(32)の立壁(3
4)に揺動自在に支持させ、第2リンク(47)の下端
を押えレバー(21)に揺動自在に連結してある。そし
て第1リンク(46)のカム(31)と対応する箇所に
ローラ(51)を回転自在に取付けている。
Below the cam (31), a link mechanism (50) consisting of a first link (46) and a second link (47) swingably connected by a support shaft (45) is provided. One end of one link (46) is connected to the vertical wall (3) of the support frame (32).
4) is swingably supported, and the lower end of the second link (47) is swingably connected to the pressing lever (21). A roller (51) is rotatably attached to a portion of the first link (46) corresponding to the cam (31).

【0017】また支持フレーム(32)の立壁(34)
(34)の下端間にばね座金(52)を取付け、このば
ね座金(52)と押えレバー(21)の端部に取付けら
れたばね座金(53)との間に引張りばね(54)を取
付けて、押えレバー(21)を上方へ引張り、第1リン
ク(46)に設けられたローラ(51)をカム(31)
のカム面(44)に常時接触させるようになっている。
Also, the standing wall (34) of the support frame (32).
Attach a spring washer (52) between the lower ends of (34) and a tension spring (54) between the spring washer (52) and the spring washer (53) attached to the end of the presser lever (21). , The presser lever (21) is pulled upward, and the roller (51) provided on the first link (46) is cammed (31).
The cam surface (44) is always contacted.

【0018】上記構成の工具弛緩装置は、非動作中は、
カム(31)の最も低いa点が第1リンク(46)に設
けられたローラ(51)に接触した状態で停止してお
り、引張りばね(54)にて押えレバー(21)が上昇
端まで引き上げられており、押えレバー(21)の押圧
部(26)を受圧部材(20)から離している。そし
て、工具交換時には電動モータ(30)を回転させて、
第1傘歯車(41)及び第2傘歯車(43)を介して回
転軸(35)を回転させ、回転軸と一体にカム(31)
を回転させる。すると、カム(31)のカム面(44)
がa点からb点に至るまでローラ(51)を下方へ押し
下げて第1リンク(46)を下方へ揺動させ、第2リン
ク(47)を介して押えレバー(21)を押し下げ、押
えレバー(21)の押圧部(26)にて受圧部材(2
0)を押し下げ、ドローバー(6)を下降させて工具を
解放させる。
The tool slackening device having the above construction is
The lowest point a of the cam (31) is stopped in contact with the roller (51) provided on the first link (46), and the tension lever (54) moves the presser lever (21) to the rising end. It is pulled up, and the pressing portion (26) of the pressing lever (21) is separated from the pressure receiving member (20). Then, when changing tools, rotate the electric motor (30),
The rotating shaft (35) is rotated through the first bevel gear (41) and the second bevel gear (43), and the cam (31) is integrated with the rotating shaft.
To rotate. Then, the cam surface (44) of the cam (31)
From the point a to the point b, the roller (51) is pushed downward to swing the first link (46) downward, and the presser lever (21) is pushed down via the second link (47). At the pressing portion (26) of (21), the pressure receiving member (2
0) is pushed down and the drawbar (6) is lowered to release the tool.

【0019】続いてカム(31)のカム面(44)がb
点からc点に至るまではローラ(51)をそのまま押し
続け、押えレバー(21)を押し下げた状態に保つ。こ
の間に工具交換装置にて主軸への工具交換が行われる。
この後カム(31)のカム面(44)のc点がローラ
(51)を乗り越えると、ローラ(51)への押し下げ
力がなくなり、引張りばね(54)にて押えレバー(2
1)が持上げられ、受圧部材(20)及びドローバー
(6)が上昇して工具をクランプする。そしてカム(3
1)のカム面(44)のa点がローラ位置に来ると、電
動モータ(30)が停止し、交換作業を完了する。
Then, the cam surface (44) of the cam (31) is b
From the point to the point c, the roller (51) is continuously pressed and the presser lever (21) is held down. During this time, the tool changer changes the tool on the spindle.
After that, when the point c of the cam surface (44) of the cam (31) passes over the roller (51), the pressing force to the roller (51) is lost, and the tension spring (54) causes the pressing lever (2) to move.
1) is lifted and the pressure receiving member (20) and the draw bar (6) rise to clamp the tool. And cam (3
When the point a of the cam surface (44) of 1) comes to the roller position, the electric motor (30) stops and the replacement work is completed.

【0020】尚、上記実施例ではカム(31)に平面カ
ムを用いたが、他に図4に示す様に端面カム(55)を
用いてもよい。端面カム(55)は、軸方向の端面(5
6)がカム面となっており、ローラ(51)を直接軸方
向へ移動させることができるので、電動モータ(30)
の出力軸(40)にカム面(56)が下面を向くように
取付け、そのカム面(56)にて直接ローラ(51)を
押えるようにすれば、第1傘歯車(41)及び第2傘歯
車(43)、回転軸(35)等が不要となり、構造が非
常に簡単になる。
Although a flat cam is used as the cam (31) in the above embodiment, an end face cam (55) may be used as shown in FIG. The end face cam (55) has an axial end face (5
Since 6) is a cam surface and the roller (51) can be moved directly in the axial direction, the electric motor (30)
If the cam surface (56) is attached to the output shaft (40) of the above so that the roller (51) is directly pressed by the cam surface (56), the first bevel gear (41) and the second bevel gear (41) The bevel gear (43), the rotary shaft (35), etc. are not necessary, and the structure is very simple.

【0021】[0021]

【発明の効果】この発明によれば、工作機械の主軸に装
着される工具をクランプ・アンクランプするドローバー
を動作させる押えレバーを、電動モータ及びカムにて電
気・機械的に動かすようにしているので、工具交換時の
み電動モータを動かせばよく、エネルギー消費量が少な
くなり、かつ動作時間が短いので、騒音も少なくなる。
According to the present invention, the holding lever for operating the draw bar for clamping / unclamping the tool mounted on the spindle of the machine tool is electrically / mechanically moved by the electric motor and the cam. Therefore, it suffices to move the electric motor only when changing the tool, which reduces energy consumption and shortens the operation time, thereby reducing noise.

【0022】また従来のように油圧ユニットやエアーコ
ンプレッサが不要で、さらに油圧配管やエアー配管等が
不要となり、構造が簡単で、製作が容易になると共に、
油洩れ等に対するメンテナンスも不要となり、煩雑な作
業から解放される。
Further, unlike the conventional case, a hydraulic unit and an air compressor are not required, and further hydraulic pipes and air pipes are not required, so that the structure is simple and the manufacture is easy, and
No maintenance is required for oil leaks, and you can be freed from complicated work.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る工具弛緩装置を示す一部破断正面
FIG. 1 is a partially cutaway front view showing a tool loosening device according to the present invention.

【図2】本発明に係る工具弛緩装置を示す一部破断側面
FIG. 2 is a partially cutaway side view showing a tool loosening device according to the present invention.

【図3】本発明に使用するカムの正面図FIG. 3 is a front view of a cam used in the present invention.

【図4】本発明に使用するカムの他の実施例を示す斜視
FIG. 4 is a perspective view showing another embodiment of the cam used in the present invention.

【図5】従来の工具弛緩装置を備えた主軸ヘッドの断面
FIG. 5 is a sectional view of a spindle head having a conventional tool loosening device.

【図6】受圧部材と押えレバーとの関係を示す平面図FIG. 6 is a plan view showing the relationship between a pressure receiving member and a presser lever.

【符号の説明】[Explanation of symbols]

1 主軸 4 主軸ヘッド 6 ドローバー 7 工具ホルダー 10 プルスタッド 11 コレット 21 押えレバー 30 電動モータ 31 カム 44 カム面 50 リンク機構 54 引張りばね 1 Spindle 4 Spindle Head 6 Drawbar 7 Tool Holder 10 Pull Stud 11 Collet 21 Presser Lever 30 Electric Motor 31 Cam 44 Cam Surface 50 Link Mechanism 54 Tension Spring

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】工作機械の主軸内にスライド自在に挿入さ
れ、下端に設けられたコレットにて前記主軸に装着され
る工具ホルダーのプルスタッドを掴み、かつ主軸内に設
けた皿ばねにて常に上方へ引かれて前記プルスタッドを
引き込み、前記工具ホルダーを前記主軸に固定するドロ
ーバーを、前記皿ばねに抗して押し下げて前記プルスタ
ッドを解放させる工具弛緩装置であって、前記主軸を保
持している主軸ヘッドに一端が揺動自在に取付けられ、
前記ドローバーを押える押えレバーと、前記押えレバー
の上方に配置されて押えレバーの他端を上下動するリン
ク機構と、前記主軸ヘッドに取付けられ、前記押えレバ
ーの他端を上方へ引張り、前記ドローバーから離す引張
りばねと、前記リンク機構と摺接したカムと、前記カム
を回転させ、カム面にて前記リンクを揺動させて、前記
ドローバーを押し下げる電動モータとで構成したことを
特徴とする工作機械の主軸の工具弛緩装置。
Claims: 1. A main shaft of a machine tool is slidably inserted, a collet provided at the lower end holds a pull stud of a tool holder attached to the main shaft, and a disc spring provided in the main shaft always holds the pull stud. A tool loosening device that pulls upwards to pull in the pull stud, and pushes down a draw bar that fixes the tool holder to the spindle against the disc spring to release the pull stud, and holds the spindle. One end is swingably attached to the main spindle head,
A presser lever for pressing the drawbar, a link mechanism arranged above the presser lever and moving the other end of the presser lever up and down, attached to the spindle head, and pulling the other end of the presser lever upward, And a tension spring which is separated from the link mechanism, a cam which is in sliding contact with the link mechanism, an electric motor which rotates the cam and swings the link on the cam surface to push down the draw bar. A tool loosening device for the machine spindle.
JP21990192A 1992-08-19 1992-08-19 Tool unclamping device of main spindle of machine tool Pending JPH0663805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21990192A JPH0663805A (en) 1992-08-19 1992-08-19 Tool unclamping device of main spindle of machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21990192A JPH0663805A (en) 1992-08-19 1992-08-19 Tool unclamping device of main spindle of machine tool

Publications (1)

Publication Number Publication Date
JPH0663805A true JPH0663805A (en) 1994-03-08

Family

ID=16742812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21990192A Pending JPH0663805A (en) 1992-08-19 1992-08-19 Tool unclamping device of main spindle of machine tool

Country Status (1)

Country Link
JP (1) JPH0663805A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003022492A1 (en) * 2001-09-07 2003-03-20 Deckel Maho Geretsried Gmbh Device for actuating a collet
KR100441936B1 (en) * 1996-12-28 2004-09-20 위아 주식회사 Link structure of automatic tool exchanger to prevent components by preventing overload with spring in link
JP2006231503A (en) * 2005-01-28 2006-09-07 Brother Ind Ltd Tool changing device
US20110217136A1 (en) * 2010-03-02 2011-09-08 Grob-Werke GmbH & Co., KG Machine tool
JP7235937B1 (en) * 2022-09-01 2023-03-08 ヤマザキマザック株式会社 Drawtube drive mechanism, spindle unit, and machine tool
CN116494190A (en) * 2023-06-25 2023-07-28 哈尔滨理工大学 Desk-top equipment is used in earthworm processing is supplementary

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100441936B1 (en) * 1996-12-28 2004-09-20 위아 주식회사 Link structure of automatic tool exchanger to prevent components by preventing overload with spring in link
WO2003022492A1 (en) * 2001-09-07 2003-03-20 Deckel Maho Geretsried Gmbh Device for actuating a collet
JP2006231503A (en) * 2005-01-28 2006-09-07 Brother Ind Ltd Tool changing device
US20110217136A1 (en) * 2010-03-02 2011-09-08 Grob-Werke GmbH & Co., KG Machine tool
JP7235937B1 (en) * 2022-09-01 2023-03-08 ヤマザキマザック株式会社 Drawtube drive mechanism, spindle unit, and machine tool
CN116494190A (en) * 2023-06-25 2023-07-28 哈尔滨理工大学 Desk-top equipment is used in earthworm processing is supplementary
CN116494190B (en) * 2023-06-25 2023-09-15 哈尔滨理工大学 Desk-top equipment is used in earthworm processing is supplementary

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