JPH0270912U

JPH0270912U -

Info

Publication number: JPH0270912U
Application number: JP14811188U
Authority: JP
Priority date: 1988-11-15
Filing date: 1988-11-15
Publication date: 1990-05-30

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例装置を示す部分破断
斜視図、第２図は第１図装置のキヤツプナツトの
左側面図、第３図は第１図装置のコレツトの正面
図、第４図は第１図のキヤツプナツトからコレツ
トを脱却する際の状態を示す断面図、第５図は本
考案の他の実施例としてのコレツトの左側面図、
第６図は従来のコレツトチヤツク装置の上部を断
面した正面図である。２……コレツト、３……環状突部、４……キヤ
ツプナツト、５……内ねじ部、６……シヤンク、
７……環状溝、８……内テーパ部、９……外テー
パ部、１０……スリツト、１１……外ねじ部、Ｌ
１，Ｌ２……直径線（Ｌ１……長軸、Ｌ２……短
軸）。 1 is a partially cutaway perspective view showing an embodiment of the device of the present invention, FIG. 2 is a left side view of the cap nut of the device shown in FIG. 1, FIG. 3 is a front view of the collet of the device shown in FIG. 1, and FIG. 4 is a sectional view showing the state when the collet is removed from the cap nut shown in Fig. 1, and Fig. 5 is a left side view of the collet as another embodiment of the present invention.
FIG. 6 is a front view of a conventional collect chuck device with the upper section cut away. 2... Collet, 3... Annular protrusion, 4... Cap nut, 5... Internal threaded part, 6... Shank,
7...Annular groove, 8...Inner tapered part, 9...Outer tapered part, 10...Slit, 11...Outer threaded part, L
1, L2...Diameter line (L1...Long axis, L2...Short axis).

Claims

[Claims for Utility Model Registration] (1) A through hole is formed at the front and rear in the axial direction, and the inner surface of the through hole has an internal thread on the rear end side and an annular projection between the internal thread and the front end. An annular groove with which the annular protrusion engages is formed on the outer surface of the front end, an external tapered portion tapering toward the rear end, and a slit extending in the axial direction in the tapered portion. and a shank having an outer threaded portion screwed into the inner threaded portion on the outer surface of the front end, and an inner tapered portion on the inner surface of the front end that is in contact with the outer tapered portion, the annular protrusion and the shank. A collet chuck device for a machine tool, wherein the radial engagement length with an annular groove is set differently on two orthogonal diameter lines. (2) The collect chuck device for a machine tool according to claim 1, wherein the internal threaded portion is chamfered so as to gradually increase in diameter toward the rear end. (3) The collect chuck device for a machine tool according to claim (2), wherein the end of the internal threaded portion is chamfered to have a convex curved shape.