JPS6346176Y2 - - Google Patents
Info
- Publication number
- JPS6346176Y2 JPS6346176Y2 JP1980154434U JP15443480U JPS6346176Y2 JP S6346176 Y2 JPS6346176 Y2 JP S6346176Y2 JP 1980154434 U JP1980154434 U JP 1980154434U JP 15443480 U JP15443480 U JP 15443480U JP S6346176 Y2 JPS6346176 Y2 JP S6346176Y2
- Authority
- JP
- Japan
- Prior art keywords
- main shaft
- pawls
- connecting rod
- movement
- limit switches
- 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
- 210000000078 claw Anatomy 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 17
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Gripping On Spindles (AREA)
Description
【考案の詳細な説明】
この考案は旋盤の主軸先端に取付けたチヤツク
の爪を、工作物に合わせて移動範囲を決め且つ増
締めを可能としたパワーチヤツクの爪移動装置に
関する。[Detailed Description of the Invention] This invention relates to a power chuck pawl moving device that allows the chuck pawl attached to the tip of the main spindle of a lathe to be moved within a range of movement according to the workpiece and to be retightened.
従来のパワーチヤツクとしては爪開閉用の駆動
源として流体圧シリンダを用いたもの、流体圧作
動モータを用いたもの及び電動機を用いたものが
知られている。そして第１のものではチヤツクに
工作物を把持して旋削加工を行なつている間は常
に圧力流体をシリンダに送り爪に増し締め力を与
えて強力切削を可能ならしめているが、爪を移動
させる機構として傾斜面を用いているため爪のス
トロークが短く、各種大きさの工作物に自動的に
適応できず、工作物に応じて作業者が爪を取替え
るか或いは例えば特開昭53−104484号のように爪
の位置を変更しなければならないという欠点があ
つた。又第２・第３のものではスクロールチヤツ
クを用いて爪のストロークを長くとり各種大きさ
の工作物に自動的に適応できるけれども、駆動源
とチヤツクとの間にクラツチ部を介装させて旋削
加工中はこのクラツチ部の連結を解除して爪に増
し締め力を与えていないため強力切削を行なうこ
とができないという欠点があつた。また実公昭55
−28412号のように爪のストロークを長くとり増
し締めを行うことができる爪開閉装置が示されて
いるけれども開閉時間が長い欠点があつた。 As conventional power chucks, those using a fluid pressure cylinder, those using a fluid pressure motor, and those using an electric motor as a drive source for opening and closing the jaws are known. In the first type, while the chuck is gripping a workpiece and turning is being performed, pressurized fluid is constantly sent to the cylinder to apply additional tightening force to the jaws, enabling powerful cutting. However, since an inclined surface is used as a mechanism for moving the jaws, the stroke of the jaws is short, and it is not possible to automatically adapt to workpieces of various sizes, and it is necessary for the operator to replace the jaws according to the workpiece, or to change the position of the jaws as in Japanese Patent Laid-Open No. 104484/1978. In the second and third types, a scroll chuck is used to extend the stroke of the jaws, making it possible to automatically adapt to workpieces of various sizes, but a clutch is interposed between the drive source and the chuck, and during turning, the connection of this clutch is released to not apply additional tightening force to the jaws, so powerful cutting is not possible. Also, in the Japanese Utility Model Laid-Open No. 1980, it was found that the clutch is not connected to the clutch, and therefore it is not possible to perform powerful cutting.
Although a claw opening and closing device capable of providing additional tightening by extending the stroke of the claws is disclosed, such as in No. 28412, it has the drawback of taking a long time to open and close.
この考案は上記欠点を解消するためになされた
もので爪のストロークの長いスクロールチヤツク
に対して爪移動用の駆動源として流体圧作動モー
タを用い、クラツチ部を介装させず、また３個以
上のリミツトスイツチの中から２個を選択するこ
とによつて爪移動の全ストロークのうち必要な範
囲に移動範囲を設定して各種大きさの工作物に容
易に適応できるようにし、更に前記２個のリミツ
トスイツチがともに作動した状態となる位置迄爪
を移動させるように流体圧作動モータが駆動させ
られる力により常に増締力を与えることのできる
チヤツクを提供するにある。 This invention was made to eliminate the above-mentioned drawbacks, and uses a fluid pressure operated motor as a driving source for moving the claws for a scroll chuck with a long stroke, without intervening a clutch part, and with three clutches. By selecting two limit switches from the above limit switches, the movement range can be set to the necessary range of the total stroke of the jaw movement, making it possible to easily adapt to workpieces of various sizes. To provide a chuck which can constantly apply additional tightening force by the force driven by a fluid pressure operated motor to move the pawls to a position where both limit switches are activated.
以下この考案の実施態様を図面にもとづき説明
する。旋盤主軸１の先端にはスクロールチヤツク
２の本体３が取付けられている。本体３の中心部
には歯車４が軸承されていて、中間歯車５を介し
てスクロール板６に刻設された内歯車７と連結さ
れている。本体３の前面には半径方向に放射状に
等角度間隔に３本の溝が設けられていて、各溝に
チヤツク爪８が摺動可能に嵌挿されている。そし
てこれら爪８は前記スクロール板６のスクロール
部と噛合つていて、歯車４の回転により各爪８は
チヤツク本体３に対して半径方向に同時に同量移
動させられるものである。 Embodiments of this invention will be described below based on the drawings. A main body 3 of a scroll chuck 2 is attached to the tip of the lathe main shaft 1. A gear 4 is rotatably supported in the center of the main body 3, and is connected to an internal gear 7 carved in a scroll plate 6 via an intermediate gear 5. Three grooves are provided at equal angular intervals in the radial direction on the front surface of the main body 3, and a chuck pawl 8 is slidably inserted into each groove. These pawls 8 are engaged with the scroll portion of the scroll plate 6, and each pawl 8 is simultaneously moved by the same amount in the radial direction with respect to the chuck body 3 by rotation of the gear 4.
前記主軸１内には軸心を一致させて連結棒９が
軸承されていて、該連結棒９の前端には前記歯車
４が固着されている。主軸１の後端部にはブラケ
ツト１０が固着されていて、このブラケツト１０
には主軸１と出力軸の軸心を一致させて流体圧作
動モータ１１例えばトロコイド形式のものが取付
けられている。そしてこの流体圧作動モータ１１
の出力軸は前記連結棒９の後端部と係合してい
て、流体圧作動モータ１１の回転が連結棒９に伝
達されるように構成されている。また前記連結棒
９の後端部には雄ねじ１２が削設されていて、こ
の雄ねじ部１２にリング状部材１３が螺装されて
いる。リング状部材１３はそのスポーク部が前記
ブラケツト１０の側壁の180゜位置に２個所穿設し
た軸方向の長穴１４を挿通して外方に突出してい
て回り止めとして作用し、連結棒９が回転したと
きにはリング状部材１３は主軸軸線方向に移動さ
れるものである。そして前記リング状部材１３が
移動したときに作動させられる近接スイツチ群１
５が図示しない主軸台に固着されている。これら
近接スイツチ群１５は少くとも３個以上本例では
５個の近接スイツチから構成されていて両端の近
接スイツチは爪のストローク端位置を検知し、他
はそれぞれ爪の全ストロークを分割した短い範囲
の爪の移動位置を順次検出するものである。これ
らのスイツチ及びその組合わせの信号で切削並び
に流体圧作動モータ１１が制御される。 A connecting rod 9 is supported within the main shaft 1 with its axes aligned with each other, and the gear 4 is fixed to the front end of the connecting rod 9. A bracket 10 is fixed to the rear end of the main shaft 1.
A fluid pressure actuated motor 11, for example, of the trochoid type, is attached to the main shaft 1 so that the axes of the main shaft 1 and the output shaft coincide with each other. And this fluid pressure operated motor 11
The output shaft of is engaged with the rear end of the connecting rod 9, so that the rotation of the hydraulic motor 11 is transmitted to the connecting rod 9. Further, a male thread 12 is cut into the rear end of the connecting rod 9, and a ring-shaped member 13 is screwed into this male threaded portion 12. The spokes of the ring-shaped member 13 are inserted through two axially elongated holes 14 bored at 180 degrees in the side wall of the bracket 10 and protrude outward, thereby acting as a rotation stopper and preventing the connecting rod 9 from rotating. When rotated, the ring-shaped member 13 is moved in the direction of the main shaft axis. A group of proximity switches 1 are activated when the ring-shaped member 13 moves.
5 is fixed to a headstock (not shown). These proximity switch groups 15 are composed of at least three or five proximity switches in this example, and the proximity switches at both ends detect the stroke end position of the claw, and the others each detect a short range that divides the entire stroke of the claw. The moving position of the claw is sequentially detected. Signals from these switches and combinations thereof control the cutting and hydraulically actuated motors 11.
次に作用について説明する。切削加工を行なう
工作物に合わせて近接スイツチ群１５の爪開放端
を除いた相隣れる２つの近接スイツチのうち始め
のスイツチが作用した後で爪８が工作物を把持す
るように選択する。この場合選ばれた２つの近接
スイツチが共に不作動状態である位置から、共に
作動状態となる位置までが爪８の移動範囲であ
り、選ばれた近接スイツチと関連して流体圧作動
モータ１１が駆動させられる。今これら２つの近
接スイツチで決められた移動範囲において爪８が
開いているものとする。工作物がチヤツクの位置
に搬送され爪８の間に挿入された後、圧力流体を
送り流体圧作動モータ１１を回転させる。流体圧
作動モータ１１の回転は連結棒９、歯車４から中
間歯車５に伝わり、スクロール板６を回わして爪
８を閉じさせる。このときリング状部材１３も同
時に軸方向に移動して選ばれた近接スイツチの一
方が作動状態となつた後爪８が工作物に接触し、
工作物を把持する。そしてこの第１のスイツチの
信号又は把持圧を感知することにより図示しない
制御装置により必要なる処理が行なわれ切削指令
が出力されて加工が行なわれる。もう１つの近接
スイツチはまだ作動状態となつていないため流体
圧作動モータには圧力流体が供給されており、爪
８は引続き閉じるように作用されている。このた
め爪８には切削加工中常に工作物を把持するよう
に増し締め力が作用している。切削完了により爪
８を開くときには圧力流体を逆方向に送り流体圧
作動モータ１１を逆転させる。次いで異なる径の
工作物を把持する場合には改めて２つの近接スイ
ツチを選択し、爪８の移動位置を変更後、上述と
同様にして工作物の把持を行なうものである。 Next, the effect will be explained. In accordance with the workpiece to be cut, the claws 8 are selected to grip the workpiece after the first switch of two adjacent proximity switches excluding the claw open end of the proximity switch group 15 is activated. In this case, the range of movement of the pawl 8 is from the position where both of the selected proximity switches are inactive to the position where both of the selected proximity switches are in the activated state, and the fluid pressure operated motor 11 is activated in relation to the selected proximity switches. be driven. It is now assumed that the claw 8 is open within the movement range determined by these two proximity switches. After the workpiece is transported to the chuck position and inserted between the jaws 8, pressurized fluid is supplied to rotate the fluid pressure operated motor 11. The rotation of the fluid pressure operated motor 11 is transmitted from the connecting rod 9 and the gear 4 to the intermediate gear 5, which rotates the scroll plate 6 and closes the pawl 8. At this time, the ring-shaped member 13 is simultaneously moved in the axial direction, and after one of the selected proximity switches is activated, the claw 8 comes into contact with the workpiece.
Grip the workpiece. By sensing the signal from the first switch or the gripping pressure, a control device (not shown) performs necessary processing, outputs a cutting command, and performs machining. Since the other proximity switch is not yet activated, the hydraulic motor is supplied with pressure fluid and the pawl 8 continues to be actuated to close. Therefore, an additional tightening force is applied to the claws 8 so as to constantly grip the workpiece during cutting. When the claw 8 is opened upon completion of cutting, the pressure fluid is sent in the opposite direction and the fluid pressure operated motor 11 is reversed. Next, when a workpiece of a different diameter is to be gripped, the two proximity switches are selected again, and after changing the moving position of the claw 8, the workpiece is gripped in the same manner as described above.
以上詳述したように本考案ではパワーチヤツク
の爪開閉機構とその駆動源とを直結し、駆動源と
して流体圧作動モータを用いたため切削中常に爪
に増し締め力を与えることができるものである。
またチヤツク本体にスクロールチヤツクを用いた
ので爪のストロークを大きくとることが可能で、
各種大きさの異なる工作物に対しても自動的に適
用できるものである。更に爪の移動範囲を分割し
て選択使用できるようになしたため常に最適な範
囲で爪を移動させることができ、工作物把持が短
時間で行なえるなどの実用的効果を有する。 As detailed above, in the present invention, the pawl opening/closing mechanism of the power chuck is directly connected to its drive source, and a fluid pressure-operated motor is used as the drive source, so that additional tightening force can be constantly applied to the pawl during cutting.
In addition, since a scroll chuck is used in the chuck body, it is possible to take a large stroke of the claw.
It can be automatically applied to workpieces of various sizes. Furthermore, since the range of movement of the claws can be divided and selectively used, the claws can always be moved within the optimum range, which has practical effects such as gripping a workpiece in a short time.
図は本考案チヤツク装置の概略断面図である。
１……主軸、２……スクロールチヤツク、４…
…歯車、８……爪、９……連結棒、１１……流体
圧作動モータ。
The figure is a schematic sectional view of the chuck device of the present invention. 1...Main shaft, 2...Scroll chuck, 4...
... Gear, 8 ... Pawl, 9 ... Connecting rod, 11 ... Fluid pressure operated motor.
Claims (1)
れたスクロールチヤツクと、前記主軸と軸心を一
致させて前記スクロールチヤツク中心部に軸承さ
れスクロールチヤツクの爪移動機構に連結されて
いる歯車と、前記主軸の軸心とその出力軸の軸心
を一致させて主軸後端部に固着されたブラケツト
に設けられた流体圧作動モータと、前記主軸貫通
穴内に軸承され前記歯車と前記流体圧作動モータ
の出力軸とを直接接続するとともに後端部にねじ
が刻設された連結棒と、該連結棒のねじに螺合す
るとともに前記ブラケツトの側壁の180゜位置の２
箇所に穿設した軸方向の長穴にそのスポーク部が
挿通されて回転が阻止されて軸方向の移動が許容
されるリング状部材と、該リング状部材で作動さ
れるように爪の全移動範囲を分割した短い範囲の
爪の移動位置を順次検出するように軸方向に固定
側に配置された３個以上のリミツトスイツチと、
該３個以上のリミツトスイツチのうちより２個が
ともに不作動状態の位置からともに作動状態とな
る位置迄爪が移動しうるよう前記流体圧作動モー
タを作動させ且つ爪の閉口時の初めに作動される
方のリミツトスイツチを工作物把持前に作動する
ように２個のリミツトスイツチが爪の移動範囲を
決めるように選択された構成としてなり、工作物
が把持されている間２個のリミツトスイツチのう
ち他の一方を不作動状態において流体圧作動モー
タを引き続き作動させて爪に増締力を与えている
ことを特徴とするパワーチヤツクの爪移動装置。 a scroll chuck attached to the front end surface of a lathe main shaft having a through hole; and a gear whose axis is aligned with the main shaft, the gear is supported in the center of the scroll chuck and is connected to a pawl moving mechanism of the scroll chuck. , a fluid-pressure-operated motor provided on a bracket fixed to the rear end of the main shaft so that the axis of the main shaft coincides with the axis of its output shaft; a fluid-pressure-operated motor supported in the main shaft through hole; A connecting rod that is directly connected to the output shaft of the motor and has a thread cut into its rear end, and a connecting rod that is screwed into the screw of the connecting rod and located at a 180° position on the side wall of the bracket.
A ring-shaped member whose spokes are inserted into elongated holes drilled in the axial direction to prevent rotation and allow axial movement, and a ring-shaped member that allows full movement of the pawl to be operated by the ring-shaped member. three or more limit switches disposed on the fixed side in the axial direction so as to sequentially detect the movement position of the claw in a short range divided into the range;
Two of the three or more limit switches actuate the hydraulic motors so that the pawls can move from a position in which they are both inoperative to a position in which they are both in an activated state, and are actuated at the beginning of the closing of the pawls. The two limit switches are configured to determine the range of movement of the jaws so that the one limit switch is activated before the workpiece is gripped, and the other of the two limit switches is activated while the workpiece is being gripped. A pawl moving device for a power chuck, characterized in that when one of the pawls is inactive, a fluid pressure operated motor continues to operate to apply additional tightening force to the pawls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980154434U JPS6346176Y2 (en) | 1980-10-28 | 1980-10-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980154434U JPS6346176Y2 (en) | 1980-10-28 | 1980-10-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5775913U JPS5775913U (en) | 1982-05-11 |
| JPS6346176Y2 true JPS6346176Y2 (en) | 1988-12-01 |
Family
ID=29513658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980154434U Expired JPS6346176Y2 (en) | 1980-10-28 | 1980-10-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6346176Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS474713U (en) * | 1971-02-05 | 1972-09-12 | ||
| JPS53104484A (en) * | 1977-02-24 | 1978-09-11 | Okuma Mach Works Ltd | Chuck click driving mechanism |
-
1980
- 1980-10-28 JP JP1980154434U patent/JPS6346176Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS474713U (en) * | 1971-02-05 | 1972-09-12 | ||
| JPS53104484A (en) * | 1977-02-24 | 1978-09-11 | Okuma Mach Works Ltd | Chuck click driving mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5775913U (en) | 1982-05-11 |
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