JPH02126708U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す主軸ヘツド
部の正面断面図、第２図はその全体正面図、第３
図はその全体側面図、第４図は工具交換機近傍の
正面図、第５図は工具交換機の平面図、第６図は
第３図の−矢視断面図、第７図は一部が破断
された第６図の−矢視図、第８図は第３図の
−矢視断面図、第９図は第８図の−矢視
図、第１０図は第９図の−矢視断面図、第１
１図は摺動ブロツク近傍の側面図、第１２図は第
１図の−矢視断面図、第１３図は第１図の
−矢視図、第１４図は第１３図の−矢視断
面図、第１５図は動作順序を説明するタイムチヤ
ートである。 ７……工具、１１……工作機械、２３……ケー
ス、２４……主軸、２６，２７，２８……軸受、
４２……ドローバー、４４……チヤツク、５０…
…弾性体、２３４……スライダ、２４１……突出
部、２４２……当接部、２５８……変換機構、２
７５……力付与部材。 Fig. 1 is a front sectional view of the spindle head showing one embodiment of this invention, Fig. 2 is its overall front view, and Fig. 3
The figure is an overall side view, Figure 4 is a front view of the vicinity of the tool changer, Figure 5 is a plan view of the tool changer, Figure 6 is a sectional view taken along the - arrow in Figure 3, and Figure 7 is a partially broken view. 6 is a cross-sectional view of FIG. 3, FIG. 9 is a cross-sectional view of FIG. 8, and FIG. 10 is a cross-sectional view of FIG. Figure, 1st
Fig. 1 is a side view of the vicinity of the sliding block, Fig. 12 is a sectional view taken in the - arrow direction of Fig. 1, Fig. 13 is a - arrow view view in Fig. 1, and Fig. 14 is a - arrow sectional view taken in Fig. 13. FIG. 15 is a time chart explaining the sequence of operations. 7...Tool, 11...Machine tool, 23...Case, 24...Spindle, 26, 27, 28...Bearing,
42...Draw bar, 44...Chuck, 50...
...Elastic body, 234...Slider, 241...Protrusion part, 242...Abutment part, 258...Conversion mechanism, 2
75...Force applying member.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 軸方向前端部に工具を装着可能でケースに軸受
を介して回転可能に支持された工作機械の主軸内
に収納され、軸方向に移動可能なドローバーと、
該ドローバーを軸方向後方に向かつて付勢する弾
性体と、ドローバーの軸方向前端に設けられドロ
ーバーが弾性体によつて軸方向後方に移動したと
き工具の後部を把持して該工具を主軸に固定する
とともに、ドローバーが軸方向前方に移動したと
き工具の後部を把持から解放して該工具を主軸か
ら固定解除するチヤツクと、を備えた工作機械の
ドローバー装置において、前記主軸の軸方向後端
部に突出部を設けるとともに、該主軸の軸方向後
部に、軸方向後方に移動したとき前記突出部に当
接する当接部を軸方向前端部に有するスライダを
軸方向に移動可能に嵌合し、かつ、該スライダに
半径方向の力を軸方向の力に変換する変換機構を
取付けるとともに、半径方向の力を変換機構に付
与する力付与部材を設け、力付与部材から変換機
構に半径方向一方側の力が付与されたとき、該変
換機構は該半径方向一方側の力を軸方向前方に向
かう力に変換し、該力によりドローバーを軸方向
前方に押圧するようにしたことを特徴とする工作
機械のドローバー装置。 A drawbar that is movable in the axial direction and is housed in the main shaft of the machine tool, which allows a tool to be attached to the front end in the axial direction and is rotatably supported in the case via a bearing.
an elastic body that urges the drawbar toward the rear in the axial direction; and an elastic body that is provided at the front end of the drawbar in the axial direction to grip the rear part of the tool and turn the tool into the main axis when the drawbar moves backward in the axial direction. and a chuck for fixing the tool and releasing the rear part of the tool from the grip when the drawbar moves forward in the axial direction to release the tool from the main shaft. A slider is provided at the axially rear end of the main shaft, and a slider having an abutting part at the axial front end that abuts the protruding part when moved axially rearward is movably fitted in the axial direction. , and a conversion mechanism that converts a radial force into an axial force is attached to the slider, and a force applying member that applies a radial force to the conversion mechanism is provided, and the force applying member is connected to the conversion mechanism in one direction in the radial direction. When a side force is applied, the conversion mechanism converts the force on one side in the radial direction into a force directed forward in the axial direction, and the force presses the drawbar forward in the axial direction. Machine tool drawbar device.