JP2548990B2 - Replacement chuck connecting device - Google Patents

Replacement chuck connecting device

Info

Publication number
JP2548990B2
JP2548990B2 JP1258550A JP25855089A JP2548990B2 JP 2548990 B2 JP2548990 B2 JP 2548990B2 JP 1258550 A JP1258550 A JP 1258550A JP 25855089 A JP25855089 A JP 25855089A JP 2548990 B2 JP2548990 B2 JP 2548990B2
Authority
JP
Japan
Prior art keywords
chuck
piece
mounting body
driving piece
replacement
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
Application number
JP1258550A
Other languages
Japanese (ja)
Other versions
JPH03121706A (en
Inventor
知弘 山本
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.)
Fuji Univance Corp
Original Assignee
Fuji Univance Corp
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 Fuji Univance Corp filed Critical Fuji Univance Corp
Priority to JP1258550A priority Critical patent/JP2548990B2/en
Publication of JPH03121706A publication Critical patent/JPH03121706A/en
Application granted granted Critical
Publication of JP2548990B2 publication Critical patent/JP2548990B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、主軸、心押し台等に取付けたチャック取付
け体に、替えチャックを着脱可能に連結する替えチャッ
クの連結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 replacement chuck connecting device for detachably connecting a replacement chuck to a chuck mounting body mounted on a spindle, a tailstock, or the like.

(従来の技術) 従来の技術として、第3図に示す構造のものがあっ
た。第3図において、(1)は主軸であり、この主軸
(1)の前部(左部)に円板状のチャック取付け体
(2)を同軸に固定支持する。チャック取付け体(2)
は、例えば6個の連結装置(3)を周方向に等ピッチで
設け、この連結装置(3)により替えチャック(12)を
チャック取付け体(2)の前部に着脱可能に連結する。
(Prior Art) As a conventional technology, there is a structure shown in FIG. In FIG. 3, (1) is a main shaft, and a disk-shaped chuck mounting body (2) is coaxially fixedly supported on the front part (left part) of the main shaft (1). Chuck attachment (2)
For example, six connecting devices (3) are provided at equal pitches in the circumferential direction, and the replacement chuck (12) is detachably connected to the front part of the chuck mounting body (2) by this connecting device (3).

即ち、上記連結装置(3)は、放射状に形成した6個
の収容穴4内に、それぞれコイルばね(5)と駆動駒
(6)とを外周方向に向けて順次嵌合させる。各駆動駒
(6)の外周側に油圧ピストン(7)を配置し、油圧ピ
ストン(7)を作動湯の供給により軸心方向に作動させ
て上記駆動駒(6)をコイルばね(5)の反力に抗して
軸心方向に押圧移動させる。上記各駆動駒(6)の右方
に、ピン(8)で揺動可能に支持したアーム(9)を配
置し、アーム(9)の左端を駆動駒(6)の軸方向中間
部に係止する。
That is, the coupling device (3) sequentially fits the coil spring (5) and the driving piece (6) in the radial direction in the six accommodation holes 4 in the outer peripheral direction. A hydraulic piston (7) is arranged on the outer peripheral side of each drive piece (6), and the hydraulic piston (7) is actuated in the axial direction by the supply of operating hot water to move the drive piece (6) to the coil spring (5). It is pressed and moved in the axial direction against the reaction force. An arm (9) swingably supported by a pin (8) is arranged to the right of each drive piece (6), and the left end of the arm (9) is engaged with an axially intermediate portion of the drive piece (6). Stop.

また、上記各アーム(9)の右方に係止駒(10)を軸
心方向に摺動可能に嵌合させるとともに、係止駒(10)
の軸心端部をチャック取付け体(2)から軸心方向に突
出させ、この係止駒(10)の軸方向中間部に上記アーム
(9)の右端を係止する。また、チャック取付け体
(2)の右面(前面)内周部にリング状のカービックカ
ップリング(11)を右方に向けて突出固定する。このカ
ービックカップリング(11)はその右端全周に放射状の
凹凸歯(ア)を形成してなる。(12)は上記チャック取
付け体(2)の右方に同軸に取付けた替えチャックであ
る。この替えチャック(12)は、左部外周に前述した係
止駒(10)の軸心端部が係合する環状の凹溝(12a)を
形成し、左面内周部にリング状の係合板を右方に凹ませ
て固定し、この係合板の左面全周に上記凹凸歯(ア)と
係合する放射状の凹凸歯を形成し、また右端部に小径の
テーパー軸(12b)を形成し、このテーパー軸(12b)に
コレットチャック(19)をテーパ嵌合させてなる。前述
した主軸(1)、チャック取付け体(2)および替えチ
ャック(12)の軸心部に、それぞれドローバー(14)、
ガイド筒(17)および作動ロッド(18)を嵌合させる。
In addition, the locking piece (10) is fitted to the right side of each arm (9) so as to be slidable in the axial direction, and the locking piece (10) is also provided.
The axial end portion of the arm is projected from the chuck mounting body (2) in the axial direction, and the right end of the arm (9) is locked to the axially intermediate portion of the locking piece (10). Further, a ring-shaped curvic coupling (11) is fixed to the inner periphery of the right surface (front surface) of the chuck mounting body (2) so as to project rightward. This curbic coupling (11) has radial concave and convex teeth (a) formed all around the right end thereof. Reference numeral (12) is a replacement chuck coaxially mounted on the right side of the chuck mounting body (2). This replacement chuck (12) has an annular recessed groove (12a) on the outer periphery of the left portion, with which the axial end of the locking piece (10) engages, and a ring-shaped engagement plate on the inner peripheral portion of the left surface. Is fixed by denting it to the right, and radial concavo-convex teeth that engage with the concavo-convex teeth (a) are formed on the entire left surface of this engagement plate, and a small diameter tapered shaft (12b) is formed at the right end. The collet chuck (19) is fitted into the taper shaft (12b) by taper fitting. A draw bar (14) and a chuck bar (2) and a replacement chuck (12) are provided on the shaft center of the draw bar (14), respectively.
The guide tube (17) and the operating rod (18) are fitted together.

ドローバー(14)は、その右端部に円筒状の周壁をス
リットにより周方向に分割するとともに、右端に軸心方
向に突出する爪と半径方向外方に突出するカム面とを形
成してなる弾性係止片(15)を有し、各弾性係止片(1
5)の内方にてドローバー(14)の右端軸心部に固定さ
れた押し駒(16)を有してなる。また、ガイド筒(17)
は、その右端内周面を右方に向かって拡開するテーパ穴
に形成してなる。また、作動ロッド(18)は、右端の大
径フランジ部(18a)をコレットチャック(19)の右端
面に当接させ、左部の軸部に括れ部(18b)を形成して
なる。
The drawbar (14) has an elastic structure in which a cylindrical peripheral wall is divided in the circumferential direction by a slit at the right end portion thereof, and a claw projecting in the axial direction and a cam surface projecting radially outward are formed at the right end. It has a locking piece (15) and each elastic locking piece (1
A push piece (16) fixed to the right end axis of the drawbar (14) is provided inside the drawbar (5). Also, the guide tube (17)
Has a right end inner peripheral surface formed into a tapered hole that widens rightward. The actuating rod (18) has a large-diameter flange portion (18a) at the right end in contact with the right end surface of the collet chuck (19), and a constricted portion (18b) is formed at the left shaft portion.

そして、ドローバー(14)の弾性係止片(15)をガイ
ド筒(17)により軸心方向に弾性変形させてその右端の
爪を、弾性係止片(15)内に嵌合させた括れ部(18b)
に係合させ、この状態でドローバー(14)を介して作動
ロッド(18)を左右動させることにより、コレットチャ
ック(19)を開閉させる。また、替えチャック(12)を
チャック取付け体(2)から離脱させる際には、まず、
ドローバー(14)を右方に移動させて弾性係止片(15)
の右端(カム面)をガイド筒(17)から右方に突出さ
せ、弾性係止片(15)を大径に弾性復帰させて爪を括れ
部(18b)から離脱させる。次いで、油圧ピストン
(7)を軸心方向に作動させて駆動駒(6)を軸心方向
に押圧し、アーム(9)を第3図において左回動させて
係止駒(10)を半径方向外方に移動させ、係止駒(10)
の軸心端部を替えチャック(12)の凹溝(12a)から離
脱させる。この状態で、替えチャック(12)を右方に移
動させてチャック取付け体(2)から離脱させる。
Then, the elastic locking piece (15) of the drawbar (14) is elastically deformed in the axial direction by the guide cylinder (17), and the claw at the right end is fitted into the elastic locking piece (15). (18b)
The collet chuck (19) is opened and closed by moving the operating rod (18) left and right through the draw bar (14) in this state. When detaching the replacement chuck (12) from the chuck mounting body (2), first,
Move the drawbar (14) to the right to move the elastic locking piece (15).
The right end (cam surface) of the is projected rightward from the guide cylinder (17), and the elastic locking piece (15) is elastically returned to a large diameter to disengage the pawl from the constricted portion (18b). Next, the hydraulic piston (7) is actuated in the axial direction to press the drive piece (6) in the axial direction, and the arm (9) is rotated left in FIG. 3 to move the locking piece (10) to the radius. Moving outwards, locking piece (10)
The end of the shaft center of the chuck is replaced with the groove (12a) of the chuck (12). In this state, the replacement chuck (12) is moved to the right and separated from the chuck mounting body (2).

また、替えチャック(12)をチャック取付け体(2)
に連結する際には、上記弾性係止片(15)を大径に弾性
復帰させた状態で、替えチャック(12)をチャック取付
け体(2)の前面に同軸に配置し、係合板の凹凸歯をカ
ービックカップリング(11)の凹凸歯(ア)に係合させ
るとともに、コレットチャック(19)の括れ部(18b)
を弾性係止片(15)の軸心部に嵌合させる。次いで、油
圧ピストン(7)を半径方向外方に作動させる。さすれ
ば、駆動駒(6)がコイルばね(5)により半径方向外
方に押圧移動され、これに伴ってアーム(9)が第3図
において右回動されて係止駒(10)が軸心方向に移動さ
れ、その軸心端部が替えチャック(12)の凹溝(12a)
に嵌合し、これにより、上記替えチャック(12)がチャ
ック取付け体(2)に連結されることになる。
Also, replace the chuck (12) with the chuck mounting body (2).
When the elastic chucking piece (15) is elastically returned to a large diameter, the replacement chuck (12) is coaxially arranged on the front surface of the chuck mounting body (2) when connecting to the The teeth are engaged with the concave and convex teeth (a) of the curbic coupling (11), and the constricted portion (18b) of the collet chuck (19) is also provided.
Is fitted to the shaft center portion of the elastic locking piece (15). The hydraulic piston (7) is then actuated radially outwards. Then, the driving piece (6) is pushed outward by the coil spring (5) in the radial direction, and accordingly, the arm (9) is rotated rightward in FIG. 3 to move the locking piece (10). It is moved in the axial direction, and its axial end is the concave groove (12a) of the replacement chuck (12).
, So that the replacement chuck (12) is connected to the chuck mounting body (2).

なお、コレットチャック(19)の開閉は、ドローバー
(14)の前進(右方移動)時に押し駒(16)で括れ部
(18b)の左端面を押圧し、また、ドローバー(14)の
後進(左方移動)時に弾性係止片(15)で括れ部(18
b)を引っ張ることにより、作動ロッド(18)を右動お
よび左動させてコレットチャック(19)を開閉させる。
The collet chuck (19) is opened and closed by pushing the left end face of the constricted portion (18b) with the pushing piece (16) when the drawbar (14) moves forward (moves to the right), and the drawbar (14) moves backward ( When moving to the left), the elastic locking piece (15) closes the constricted part (18
By pulling b), the operating rod (18) is moved to the right and left to open and close the collet chuck (19).

(発明が解決しようとする課題) 上記従来のものは、チャック取付け体(2)の半径方
向外方に多数の油圧ピストン(7)を設け、この油圧ピ
ストン(7)により駆動駒(6)を軸心方向に移動させ
て係止駒(10)を替えチャック(12)から離脱させるよ
うにしていたので、外径が増大するとともに、ドローバ
ー(14)操作用の油圧機構に加え、連結装置操作用の多
数の油圧機構を必要とし、油圧回路が複雑になって故障
し易くなるとともに組付け、調整に手数を要し、また操
作が煩雑になる欠点があった。本発明は、上記欠点を解
消した新規な替えチャックの連結装置を得ることを目的
とする。
(Problems to be Solved by the Invention) In the above-mentioned conventional one, a large number of hydraulic pistons (7) are provided on the outer side in the radial direction of the chuck mounting body (2), and the driving piece (6) is formed by the hydraulic pistons (7). Since the locking piece (10) was moved in the axial direction to be detached from the replacement chuck (12), the outer diameter increased, and in addition to the hydraulic mechanism for operating the drawbar (14), the operation of the connecting device It requires a large number of hydraulic mechanisms for operation, complicates the hydraulic circuit, is prone to malfunction, requires labor for assembly and adjustment, and is complicated in operation. SUMMARY OF THE INVENTION It is an object of the present invention to obtain a novel replacement chuck connecting device that solves the above drawbacks.

(課題を解決するための手段) 本発明は、上記目的を達成するために、以下の如く構
成したものである。即ち、前部にコレットチャック(3
2)を、軸心部に軸方向に往復動してコレットチャック
(32)を開閉させる作動ロッド(35)を有する替えチャ
ック(30)を設け、替えチャック(30)をチャック取付
け体(21)の前部に着脱可能に連結する連結装置(22)
を設けてなる替えチャックの連結装置において、連結装
置(22)は、チャック取付け体(21)に放射状に嵌合
し、かつ係止ばね(26)により軸心方向に弾圧されてそ
の軸心端部がチャック取付け体(21)の軸孔(21a)内
に突出する複数個の支持体(23)と、各支持体(23)に
固定され、かつ替えチャック(30)の外周部に半径方向
外方から係止する係止アーム(25)と、チャック取付け
体(21)の軸心部に嵌合してドローバー(33)と作動ロ
ッド(35)とを連結し、かつ外周部にドローバー(33)
の前進時に支持体(23)の軸心部を半径方向外方に押圧
するカム面(34a)を有する駆動駒(34)と、駆動駒(3
4)をそのカム面(34a)が支持体(23)の直前に位置す
るまで前進方向に弾圧する復帰ばね(38)と、作動ロッ
ド(35)から後方に突出して駆動駒(34)の軸心部に摺
動可能に嵌合するとともに、該嵌合部に括れ部(36a)
を有する連結軸(36)と、駆動駒(34)に半径方向に摺
動可能に嵌合して半径方向内端が括れ部(36a)に係止
する係止駒(37)と、駆動駒(34)のカム面(34a)が
支持体(23)を半径方向外方に押圧するまで前進された
際に、係止駒(37)の半径方向外への移動を許容し、駆
動駒(34)と作動ロッド(35)との連結を解除するチャ
ック取付け体(21)の軸孔(21a)に設けた逃げ凹部と
を有してなる構成にしたものである。
(Means for Solving the Problems) The present invention is configured as follows in order to achieve the above object. That is, the collet chuck (3
2) is provided with a replacement chuck (30) having an operating rod (35) that reciprocates in the axial direction in the axial direction to open and close the collet chuck (32), and the replacement chuck (30) is attached to the chuck mounting body (21). Device (22) for detachable connection to the front of the vehicle
In the connecting device of the replacement chuck, the connecting device (22) is fitted radially to the chuck mounting body (21), and is elastically pressed in the axial direction by the locking spring (26) so that the axial end thereof is A plurality of supporting members (23) whose parts project into the axial hole (21a) of the chuck mounting member (21) and fixed to each supporting member (23) and in the radial direction on the outer peripheral portion of the replacement chuck (30). The locking arm (25) that locks from the outside is fitted to the shaft center of the chuck mounting body (21) to connect the drawbar (33) and the operating rod (35) and to the outer periphery of the drawbar (25). 33)
Drive piece (34) having a cam surface (34a) that presses the axial center portion of the support body (23) outward in the radial direction during forward movement of the drive piece (3).
4) A return spring (38) that elastically presses the cam surface (34a) in the forward direction until the cam surface (34a) is located immediately before the support body (23), and a shaft of the drive piece (34) that projects rearward from the operating rod (35). Slidingly fits in the core part, and constricted part (36a) in the fitting part.
A connecting shaft (36), a locking piece (37) slidably fitted in the driving piece (34) in the radial direction and having an inner end in the radial direction locked to the constricted portion (36a), and a driving piece. When the cam surface (34a) of (34) is advanced to press the support (23) outward in the radial direction, the locking piece (37) is allowed to move outward in the radial direction, and the drive piece ( 34) and the operating rod (35) are provided with a relief recess provided in the shaft hole (21a) of the chuck mounting body (21).

(作用) 本発明は上記構成にしたものであるから、ドローバー
(33)を油圧機構等により後方に引っ張ると、駆動駒
(37)を介して作動ロッド(35)が後進し、コレットチ
ャック(32)が一方に作動、例えば開作動され、また、
ドローバー(33)の後方への緊張を解除すると、復帰ば
ね(38)の反力により、駆動駒(37)が支持体(23)の
直前位置まで前方に移動され、作動ロッド(35)が前進
してコレットチャック(32)が他方に作動、例えば閉作
動される。
(Operation) Since the present invention is configured as described above, when the draw bar (33) is pulled rearward by a hydraulic mechanism or the like, the operating rod (35) moves backward via the drive piece (37), and the collet chuck (32). ) Is actuated to one side, for example opened, and
When the backward tension of the drawbar (33) is released, the reaction force of the return spring (38) moves the drive piece (37) forward to the position immediately before the support body (23), and the operating rod (35) moves forward. Then, the collet chuck (32) is operated to the other side, for example, closed.

次に、油圧機構等によりドローバー(33)の前進量を
大きくすると、駆動駒(37)のカム面(34a)が支持体
(23)の軸心端を半径方向外方に押圧し、支持体(23)
が半径方向外方に移動され、これにより、係止アーム
(25)が半径方向外方に移動されて替えチャック(30)
の外周から離脱し、同時に係止駒(37)の半径方向外方
への移動が許容され、係止駒(37)の半径方内端が作動
ロッド(35)の括れ部(36a)から離脱し、駆動駒(3
4)と作動ロッド(35)との連結が解除、従って替えチ
ャックとチャック取付け体との連結が解除されることに
なる。
Next, when the advance amount of the draw bar (33) is increased by a hydraulic mechanism or the like, the cam surface (34a) of the drive piece (37) presses the axial center end of the support body (23) outward in the radial direction, and the support body (twenty three)
Is moved radially outward, which causes the locking arm (25) to be moved radially outward to replace the chuck (30).
Of the locking piece (37) is allowed to move outward in the radial direction, and the radially inner end of the locking piece (37) separates from the constricted part (36a) of the operating rod (35). Drive piece (3
The connection between 4) and the operating rod (35) is released, and therefore the connection between the replacement chuck and the chuck mounting body is released.

(実施例) 以下本発明の実施例を図面に基いて説明する。図面に
おいて、第1図は本発明の実施例を示す断面図、第2図
はそのII−II線による部分断面図である。第1図におい
て、(20)は主軸であり、この主軸(20)の前部(右
部)に円板状のチャック取付け体(21)を同軸に固定支
持する。チャック取付け体(21)は、例えば3個の連結
装置(22)を周方向に等ピッチで設け、この連結装置
(22)により後述の替えチャック(30)をチャック取付
け体(21)の前部に着脱可能に連結する。上記連結装置
(22)は以下の如くなっている。
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In the drawings, FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a partial sectional view taken along line II-II thereof. In FIG. 1, (20) is a main shaft, and a disc-shaped chuck mounting body (21) is coaxially fixedly supported on the front part (right part) of the main shaft (20). The chuck attachment body (21) is provided with, for example, three coupling devices (22) at equal pitches in the circumferential direction, and a replacement chuck (30) described later is attached to the front portion of the chuck attachment body (21) by the coupling device (22). Removably connect to. The connecting device (22) is as follows.

即ち、チャック取付け体(21)内に3個の円柱状の支
持体(23)を周方向に放射状に配置して半径方向に摺動
可能に嵌挿する。上記各支持体(23)は、その軸心端部
をチャック取付け体(21)の軸心部に形成した軸孔(21
a)内に露出させ、この軸心端部にボール(24)を取付
ける。また、外周端部をチャック取付け体(21)の外周
部に形成した凹欠き部(21b)に露出させ、この外周端
部に係止アーム(25)を取付ける。また、上記支持体
(23)は、係止ばね(26)により軸心方向に弾圧付勢す
る。この係止ばね(26)は、第2図に示すように、支持
体(23)の軸方向中間部に固定したばね受け(27)と、
凹欠き部(21b)の外周端部に固定したばね押え(28)
との間に介在させてなる。
That is, three cylindrical support bodies (23) are radially arranged in the chuck mounting body (21) and are slidably inserted in the radial direction. Each of the above-mentioned supports (23) has a shaft hole (21
Place the ball (24) on the end of this shaft by exposing it inside a). Further, the outer peripheral end is exposed in a recessed portion (21b) formed in the outer peripheral part of the chuck mounting body (21), and the locking arm (25) is attached to the outer peripheral end. The support body (23) is elastically biased in the axial direction by the locking spring (26). As shown in FIG. 2, the locking spring (26) includes a spring receiver (27) fixed to an axially intermediate portion of the support (23),
Spring retainer (28) fixed to the outer peripheral edge of the recess (21b)
And intervenes between.

係止アーム(25)は、第1図に示すように、その右端
部をチャック取付け体(21)から右方(前方)に突出さ
せるとともに、その突出端部を軸心方向に屈曲させて爪
(25a)を形成してなる。また、チャック取付け体(2
1)の右面(前面)内周部にリング状のカービックカッ
プリング(29)を固定し、このカービックカップリング
(29)の右面全周に放射状の凹凸歯(ア)を形成する。
(30)は上記チャック取付け体(21)の右方に同軸に取
付けた円板状の替えチャックである。
As shown in FIG. 1, the locking arm (25) has its right end protruding from the chuck mounting body (21) to the right (forward), and its protruding end is bent in the axial direction to cause the pawl. (25a) is formed. In addition, the chuck mounting body (2
A ring-shaped curbic coupling (29) is fixed to the inner periphery of the right surface (front surface) of (1), and radial concave and convex teeth (a) are formed on the entire circumference of the right surface of this curbic coupling (29).
Reference numeral (30) is a disc-shaped replacement chuck coaxially mounted on the right side of the chuck mounting body (21).

この替えチャック(30)は、左部外周に前述した係止
アーム(25)の爪(25a)が係合する環状のフランジ(3
0a)を形成し、左面内周部にリング状の係合板(31)を
固定し、この係合板(31)の左面全周に上記凹凸歯
(ア)と係合する放射状の凹凸歯を形成し、右端部に小
径かつ右方に向かって小径となるテーパ面に形成した取
付け軸(30b)を形成してなる。
This replacement chuck (30) has an annular flange (3) with which the claw (25a) of the locking arm (25) described above engages on the outer periphery of the left part.
0a) is formed, a ring-shaped engaging plate (31) is fixed to the inner peripheral portion of the left surface, and radial concave and convex teeth that engage with the concave and convex teeth (a) are formed on the entire left surface of the engaging plate (31). Then, the mounting shaft (30b) is formed at the right end portion with a tapered surface having a small diameter and a diameter decreasing toward the right side.

上記取付け軸(30b)の外周に、周壁の大部分がスリ
ットにより周方向に分断された円筒状のコレットチャッ
ク(32)をテーパ嵌合させる。また、主軸(20)、チャ
ック取付け体(21)および替えチャック(30)の軸心部
に、ドローバー(33)、駆動駒(34)および作動ロッド
(35)を嵌合させる。
A cylindrical collet chuck (32) whose peripheral wall is divided by slits in the circumferential direction is taper-fitted to the outer periphery of the mounting shaft (30b). Further, the drawbar (33), the driving piece (34) and the operating rod (35) are fitted to the shaft center portions of the main shaft (20), the chuck mounting body (21) and the replacement chuck (30).

ドローバー(33)は、油圧機構(図示省略)に連結さ
れ、油路を切り替えるレバー(図示省略)を操作して左
右動されるようになっており、このドローバー(33)の
右端部に駆動駒(34)を一体的に連結する。
The drawbar (33) is connected to a hydraulic mechanism (not shown) and can be moved left and right by operating a lever (not shown) for switching the oil passage. The drawbar (33) has a driving piece at the right end. (34) are integrally connected.

駆動駒(34)は、大径に形成するとともに、その右端
部に前方に向かって縮小するテーパ面からなるカム面
(34a)を形成してなる。
The drive piece (34) is formed to have a large diameter, and a cam surface (34a) formed of a taper surface that shrinks toward the front is formed at the right end portion of the drive piece (34).

作動ロッド(35)は、その右端部にコレットチャック
(32)の右端に当接する大径のフランジ(35a)を形成
し、左端に連結軸(36)をねじ連結してなる。上記連結
軸(36)は、その左部に括れ部(36a)を形成し、この
括れ部(36a)を駆動駒(34)の軸心部に嵌合させ、駆
動駒(34)に外周側から軸心方向に向けて嵌合した係止
駒(37)の軸心端部を上記括れ部(36a)に嵌入させて
軸方向に離脱不能に連結する。
The actuating rod (35) has a large diameter flange (35a) that abuts the right end of the collet chuck (32) at the right end thereof, and has a connecting shaft (36) screwed at the left end. The connecting shaft (36) has a constricted portion (36a) formed on the left side thereof, and the constricted portion (36a) is fitted to the shaft center portion of the driving piece (34) so that the driving piece (34) has an outer peripheral side. The axial end portion of the locking piece (37) fitted in the axial direction from the above is fitted into the constricted portion (36a) so as to be irremovably connected in the axial direction.

この場合、軸孔(21a)は、支持体(23)部位の内径
を主軸(20)部位の内径に比し、段状に大径(逃げ凹
部)に形成し、駆動駒(34)が支持体(23)の左方に位
置する際に、係止駒(37)の外周端を軸孔(21a)の小
径側の内周面に当接させて該係止駒(37)の半径方向外
方への移動、つまり括れ部(36a)からの離脱を阻止
し、また、駆動駒(34)が支持体(23)部位に到来した
際に、軸孔(21a)の大径(逃げ凹部)側の内周面を係
止駒(37)の外周端から離間させ、係止駒(37)の半径
方向外方への移動、つまり括れ部(36a)からの離脱を
許容する。
In this case, the shaft hole (21a) is formed in a step-like large diameter (escaping recess) in comparison with the inner diameter of the support body (23) part compared to the inner diameter of the main shaft (20) part, and the driving piece (34) is supported by When located on the left side of the body (23), the outer peripheral end of the locking piece (37) is brought into contact with the inner peripheral surface of the shaft hole (21a) on the small diameter side, and the locking piece (37) is radiated in the radial direction. The outward movement, that is, the separation from the constricted portion (36a) is prevented, and when the drive piece (34) reaches the support body (23), the large diameter of the shaft hole (21a) (escape recessed portion). ) Side inner peripheral surface is separated from the outer peripheral end of the locking piece (37) to allow the locking piece (37) to move radially outward, that is, to separate from the constricted portion (36a).

(38)はドローバー(33)を右方に弾圧する皿ばねか
らなる復帰ばねであり、油圧機構のニュートラル時にド
ローバー(33)を、駆動駒(34)のカム面(34a)が支
持体(23)のボール(24)の直左方に位置するまで前進
させるとともに、作動ロッド(35)の左方への緊張を解
除してコレットチャック(32)を小径に弾性復帰させ
る。
Reference numeral (38) is a return spring composed of a disc spring that elastically presses the draw bar (33) to the right. When the hydraulic mechanism is in neutral, the draw bar (33) is supported by the cam surface (34a) of the driving piece (34) on the support body (23). ) Is moved to the immediate left of the ball (24) and the tension of the operating rod (35) is released to the left to elastically return the collet chuck (32) to a small diameter.

次に上記実施例の作動態様について説明する。ドロー
バー(33)を復帰ばね(38)に抗して油圧機構により左
方に引っ張ると、駆動駒(34)を介して作動ロッド(3
5)が左方に移動し、コレットチャック(32)が左方に
押されて大径に開作動され、これによりワーク(イ)を
替えチャック(30)に固定する。また、ドローバー(3
3)の左方への緊張を解除すると、復帰ばね(38)の反
力により、駆動駒(34)が支持体(23)の直前位置まで
右方に移動され、作動ロッド(35)が右進してコレット
チャック(32)が自身の弾性力により小径に閉作動し、
ワーク(イ)の固定を解除する。
Next, the operation mode of the above embodiment will be described. When the draw bar (33) is pulled to the left by the hydraulic mechanism against the return spring (38), the actuating rod (3
5) moves to the left and the collet chuck (32) is pushed to the left to open to a large diameter, thereby fixing the work (a) to the replacement chuck (30). In addition, the drawbar (3
When the tension of 3) to the left is released, the driving force (34) is moved to the position just before the support (23) by the reaction force of the return spring (38), and the operating rod (35) is moved to the right. And the collet chuck (32) closes to a small diameter by its own elastic force,
Unlock the work (a).

次に、油圧機構によりドローバー(33)を大きく右方
に移動させると、駆動駒(34)のカム面(34a)が支持
体(23)の軸心端を半径方向外方に押圧し、支持体(2
3)を介して係止アーム(25)を半径方向外方に移動さ
せ、係止アーム(25)の爪(25a)が替えチャック(3
0)のフランジ(30a)から離脱し、替えチャック(30)
とチャック取付け体(21)との連結が解除されることに
なる。
Next, when the draw bar (33) is largely moved to the right by the hydraulic mechanism, the cam surface (34a) of the drive piece (34) presses the axial center end of the support body (23) outward in the radial direction to support it. Body (2
The locking arm (25) is moved radially outwardly via the (3), and the claw (25a) of the locking arm (25) is replaced by the chuck (3).
0) Flange (30a) is removed and replacement chuck (30)
Then, the connection between the chuck and the chuck mounting body (21) is released.

同時に係止駒(37)が支持体(23)部位に到来して半
径方向外方への移動、つまり括れ部(36a)からの離脱
が許容され、これにより、替えチャック(30)をチャッ
ク取付け体(21)から右方に向けて離脱させることがで
きる。
At the same time, the locking piece (37) reaches the support body (23) and is allowed to move outward in the radial direction, that is, to be detached from the constricted portion (36a), whereby the replacement chuck (30) is attached to the chuck. It can be detached from the body (21) to the right.

また、新規の替えチャック(30)をチャック取付け体
(21)の右面(前面)に同軸に配置し、係合板(31)の
凹凸歯をカービックカップリング(29)の凹凸歯(ア)
に係合させるとともに、連結軸(36)を駆動駒(34)の
軸心部に嵌合させ、この状態でドローバー(33)を油圧
機構により左方に移動させると、駆動駒(34)のカム面
(34a)が支持体(23)から左方に退避し、支持体(2
3)が係止ばね(26)の反力により、軸心方向に移動さ
れ、係止アーム(25)が軸心方向に移動してその爪(25
a)が上記替えチャック(30)のフランジ(30a)に係合
する。
Further, a new replacement chuck (30) is coaxially arranged on the right surface (front surface) of the chuck mounting body (21), and the concavo-convex teeth of the engagement plate (31) are arranged on the concavo-convex teeth (a) of the carbic coupling (29).
When the drawbar (33) is moved to the left by the hydraulic mechanism in this state while engaging the connection shaft (36) with the shaft center of the drive piece (34), the drive piece (34) The cam surface (34a) retracts to the left from the support (23), and the support (2
3) is moved in the axial direction by the reaction force of the locking spring (26), the locking arm (25) is moved in the axial direction, and its claw (25
a) engages the flange (30a) of the replacement chuck (30).

同時に駆動駒(34)が支持体(23)の左方に移動し、
係止駒(37)が軸孔(21a)の小径側の内周面により軸
心方向に移動してその軸心端部が括れ部(36a)内に嵌
合し、これにより、替えチャック(30)がチャック取付
け体(21)に連結されることになる。
At the same time, the drive piece (34) moves to the left of the support (23),
The locking piece (37) is moved in the axial direction by the inner peripheral surface of the shaft hole (21a) on the small diameter side, and its axial end portion is fitted into the constricted portion (36a). 30) will be connected to the chuck mounting body (21).

(発明の効果) 以上の説明から明らかな如く、本発明は、駆動駒をド
ローバーと復帰ばねとにより、軸孔の後部側で軸方向に
往復動させることにより、連結軸、作動ロッドを介して
コレットチャックを開閉するようにし、また、駆動駒を
ドローバーにより大きく前進させて軸孔の前部側に位置
させることにより、駆動駒のカム面、支持体を介して係
止アームを替えチャックから離脱させると同時に、係止
駒を連結軸の括れ部から離脱可能にして駆動駒と作動ロ
ッド、従って替えチャックとの連結を解除するようにし
たので、油圧機構は一個ですみ、従来のような多数の油
圧機構及び複雑な油圧回路を要しなくなり、組付け、調
整が容易になるとともに耐久性に富むことになる。ま
た、連結装置の操作が簡素になり、替えチャックを迅速
に交換することができる等の効果を奏する。
(Effects of the Invention) As is clear from the above description, according to the present invention, the drive bar is axially reciprocated on the rear side of the shaft hole by the draw bar and the return spring, so that the connecting shaft and the actuating rod are interposed. The collet chuck is opened and closed, and the drive piece is advanced by a draw bar to be positioned in front of the shaft hole, so that the locking arm is disengaged from the replacement chuck via the cam surface of the drive piece and the support body. At the same time, the locking piece can be detached from the constricted part of the connecting shaft to release the connection between the driving piece and the operating rod, and thus the replacement chuck, so that only one hydraulic mechanism is needed, and many conventional This eliminates the need for a hydraulic mechanism and a complicated hydraulic circuit, makes it easy to assemble and adjust and is highly durable. In addition, the operation of the connecting device is simplified, and the replacement chuck can be quickly replaced.

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

第1図は本発明の実施例を示す断面図、第2図はそのII
−II線による部分断面図、第3図は従来例を示す部分断
面図である。 20:主軸、21:チャック取付け体、21a軸孔、21b:凹欠き
部、22:連結装置、23:支持体、24:ボール、25:係止アー
ム、25a:爪、26:係止ばね、27:ばね受け、28:ばね押さ
え、29:カービックカップリング、30:替えチャック、30
a:フランジ、30b:取付け軸、31:係合板、32:コレットチ
ャック、33:ドローバー、34:駆動駒、34a:カム面、35:
作動ロッド、35a:フランジ、36:連結軸、36a:括れ部、3
7:係止駒、38:復帰ばね、(ア):凹凸歯、(イ):ワ
ーク。
FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is its II.
FIG. 3 is a partial sectional view taken along line II, and FIG. 3 is a partial sectional view showing a conventional example. 20: spindle, 21: chuck mounting body, 21a shaft hole, 21b: recessed portion, 22: connecting device, 23: support body, 24: ball, 25: locking arm, 25a: claw, 26: locking spring, 27: Spring holder, 28: Spring retainer, 29: Curbic coupling, 30: Replacement chuck, 30
a: flange, 30b: mounting shaft, 31: engaging plate, 32: collet chuck, 33: draw bar, 34: driving piece, 34a: cam surface, 35:
Actuating rod, 35a: Flange, 36: Connecting shaft, 36a: Constricted part, 3
7: Locking piece, 38: Return spring, (A): Concavo-convex tooth, (A): Work piece.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】前部にコレットチャック(32)を、軸心部
に軸方向に往復動してコレットチャック(32)を開閉さ
せる作動ロッド(35)を有する替えチャック(30)を設
け、替えチャック(30)をチャック取付け体(21)の前
部に着脱可能に連結する連結装置(22)を設けてなる替
えチャックの連結装置において、連結装置(22)は、チ
ャック取付け体(21)に放射状に嵌合し、かつ係止ばね
(26)により軸心方向に弾圧されてその軸心端部がチャ
ック取付け体(21)の軸孔(21a)内に突出する複数個
の支持体(23)と、各支持体(23)に固定され、かつ替
えチャック(30)の外周部に半径方向外方から係止する
係止アーム(25)と、チャック取付け体(21)の軸心部
に嵌合してドローバー(33)と作動ロッド(35)とを連
結し、かつ外周部にドローバー(33)の前進時に支持体
(23)の軸心部を半径方向外方に押圧するカム面(34
a)を有する駆動駒(34)と、駆動駒(34)をそのカム
面(34a)が支持体(23)の直前に位置するまで前進方
向に弾圧する復帰ばね(38)と、作動ロッド(35)から
後方に突出して駆動駒(34)の軸心部に摺動可能に嵌合
するとともに、該嵌合部に括れ部(36a)を有する連結
軸(36)と、駆動駒(34)に半径方向に摺動可能に嵌合
して半径方向内端が括れ部(36a)に係止する係止駒(3
7)と、駆動駒(34)のカム面(34a)が支持体(23)を
半径方向外方に押圧するまで前進された際に、係止駒
(37)の半径方向外への移動を許容し、駆動駒(34)と
作動ロッド(35)との連結を解除するチャック取付け体
(21)の軸孔(21a)に設けた逃げ凹部とを有してなる
替えチャックの連結装置。
1. A replacement chuck (30) having a collet chuck (32) at the front part and an actuating rod (35) at the axial center part for reciprocating in the axial direction to open and close the collet chuck (32). A connecting device (22) for connecting a chuck (30) to a front part of a chuck mounting body (21) in a detachable manner, wherein the connecting device (22) is connected to the chuck mounting body (21). A plurality of support members (23) that are radially fitted and elastically pressed in the axial direction by the locking spring (26) so that their axial end portions project into the axial hole (21a) of the chuck mounting body (21). ), A locking arm (25) that is fixed to each support (23) and that locks the outer periphery of the replacement chuck (30) from the outside in the radial direction, and the axial center of the chuck mounting body (21). Fit together to connect the drawbar (33) and the actuating rod (35) and to the drawbar (3 A cam surface (34) that pushes the axial center of the support (23) outward in the radial direction during forward movement of (3)
a) a driving piece (34), a return spring (38) for elastically pushing the driving piece (34) in the forward direction until the cam surface (34a) of the driving piece (34a) is positioned immediately before the support body (23), and an actuating rod (38). 35) and a connecting shaft (36) projecting rearward from the driving piece (34) so as to be slidably fitted in the shaft center portion of the driving piece (34) and having a constricted portion (36a) in the fitting portion, and the driving piece (34). A locking piece (3) that is fitted in a slidable manner in the radial direction and whose radial inner end is locked in the constricted part (36a).
7) and the cam surface (34a) of the drive piece (34) are pushed forward until they push the support body (23) outward in the radial direction, the movement of the locking piece (37) outward in the radial direction. A connecting device for replacement chucks, which has a relief recess provided in a shaft hole (21a) of a chuck mounting body (21) that allows and releases the connection between the driving piece (34) and the operating rod (35).
JP1258550A 1989-10-03 1989-10-03 Replacement chuck connecting device Expired - Lifetime JP2548990B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1258550A JP2548990B2 (en) 1989-10-03 1989-10-03 Replacement chuck connecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1258550A JP2548990B2 (en) 1989-10-03 1989-10-03 Replacement chuck connecting device

Publications (2)

Publication Number Publication Date
JPH03121706A JPH03121706A (en) 1991-05-23
JP2548990B2 true JP2548990B2 (en) 1996-10-30

Family

ID=17321790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1258550A Expired - Lifetime JP2548990B2 (en) 1989-10-03 1989-10-03 Replacement chuck connecting device

Country Status (1)

Country Link
JP (1) JP2548990B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5347782B2 (en) * 2009-07-09 2013-11-20 村田機械株式会社 Coupling device
CN102554299A (en) * 2010-12-15 2012-07-11 贺自清 Self-centering power chuck for swing rod
US10518334B2 (en) * 2015-08-06 2019-12-31 Fuji Corporation Chuck device

Also Published As

Publication number Publication date
JPH03121706A (en) 1991-05-23

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