JPH0365607U

JPH0365607U -

Info

Publication number: JPH0365607U
Application number: JP12603089U
Authority: JP
Priority date: 1989-10-28
Filing date: 1989-10-28
Publication date: 1991-06-26

Description

[Brief explanation of the drawing]

第１図はチヤツクの縦断面図、第２図は外径把
握用交換ジヨーを取付けたジヨー部平面図、第３
図は内径把握用交換ジヨーを取付けたジヨー部平
面図、第４図は従来の交換チヤツクのジヨー部断
面図、第５図は第４図の−線断面図である。１１……チヤツク本体、１２……ベースジヨー
、１２ａ……内径把握用基準面、１２ｂ……外径
把握用基準面、１２ｄ……突出部、１２ｃ……首
部、１２ｅ……頚部、２０ｄ……外径把握用交換
ジヨー、２１……内径把握用交換ジヨー、２１ｄ
……内径把握用基準面。 Figure 1 is a longitudinal cross-sectional view of the chuck, Figure 2 is a plan view of the jaw with the replacement jaw for grasping the outer diameter attached, and Figure 3 is a longitudinal sectional view of the chuck.
4 is a sectional view of the jaw portion of a conventional exchange chuck, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. 11...Chuck body, 12...Base jaw, 12a...Reference surface for grasping inner diameter, 12b...Reference surface for grasping outer diameter, 12d...Protrusion, 12c...Neck, 12e...Neck, 20d...Outer Replacement jaw for grasping diameter, 21...Replacement jaw for grasping inner diameter, 21d
...Reference surface for grasping the inner diameter.

Claims

[Claims for Utility Model Registration] (1) A plurality of base jaws movably disposed at equiangular positions in a radial direction, and an exchangeable jaw that is removable from a protrusion provided on the base jaw and having a chuck axial engaging portion. In the chuck, a reference surface is formed to be located concentrically on each of the base jaws, a reference surface is formed on each of the replacement jaws and corresponds concentrically to the reference surface, and both reference surfaces are in contact with each other. A chuck with replaceable jaws that grips the workpiece in a closed position. (2) A plurality of base jaws that are movably arranged at equal angular positions in the radial direction are capable of engaging and disengaging from protrusions having engaging parts in the chuck axial direction, and are capable of replacing the inner diameter gripping replacement jaw and the outer diameter gripping replacement jaw. In the chuck, a reference surface for grasping the inner diameter is formed at the inner end of each of the base jaws, and a reference surface for grasping the outer diameter is formed at the outer end thereof so that they are located concentrically. A reference surface corresponding to the reference surface for grasping the inner diameter of the base jyo is located concentrically at the end, and a reference surface corresponding to the reference surface for grasping the outer diameter of the base jyo is located concentrically at the outer end of the replacement jyo for grasping the outer diameter. An exchangeable chuck characterized in that the chuck is formed in a shape of 1, and grips the workpiece while the corresponding reference surface is in contact with the workpiece.