JPH02100708U

JPH02100708U -

Info

Publication number: JPH02100708U
Application number: JP804489U
Authority: JP
Priority date: 1989-01-26
Filing date: 1989-01-26
Publication date: 1990-08-10
Anticipated expiration: 2004-01-26
Also published as: JPH0713923Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の一部切欠断面図、
第２図は第１図のＡＡ線断面図、第３図は第１図
のＢＢ線断面図、第４図はその部分分解斜視図、
第５図ａ，ｂはその作動説明図であり、第６図は
他の実施例の一部切欠断面図、第７図は第６図の
ＣＣ線断面図、第８図は第６図のＤＤ線断面図、
第９図ａ，ｂはその作動説明図である。ａ：工具、ｂ：テーパシヤンク、ｄ：鍔、１，
１ａ：スピンドル、２，２ａ：取付孔、４：突起
、４ａ：段部、５，５ａ：チヤツクホルダ、１０
：コレツトチヤツク、１０ａ：割コレツト、１１
：基部、１７：中心孔、１７ａ：段付部、２０：
押圧筒体、２２：ストツパピン、２５，２５ａ：
引張部材、２８，２８ａ：操作棒、３２：皿ばね
、３３，３３ａ：圧縮コイルばね。 FIG. 1 is a partially cutaway sectional view of an embodiment of the present invention.
2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a sectional view taken along the BB line in FIG. 1, and FIG. 4 is a partially exploded perspective view thereof.
5a and 5b are explanatory diagrams of its operation, FIG. 6 is a partially cutaway sectional view of another embodiment, FIG. 7 is a sectional view taken along line CC in FIG. 6, and FIG. 8 is a sectional view of FIG. DD line sectional view,
FIGS. 9a and 9b are explanatory diagrams of the operation. a: tool, b: taper shank, d: tsuba, 1,
1a: spindle, 2, 2a: mounting hole, 4: protrusion, 4a: step, 5, 5a: chuck holder, 10
: collect chuck, 10a: collect collect, 11
: Base, 17: Center hole, 17a: Stepped part, 20:
Press cylinder, 22: Stopper pin, 25, 25a:
Tension member, 28, 28a: operating rod, 32: disc spring, 33, 33a: compression coil spring.

Claims

[Scope of utility model registration request]

A flange formed at the rear end of the shank is held at the rear of the mounting hole in a hollow spindle, which has a tapered mounting hole at the tip into which the shank at the rear end of the tool is inserted, by reducing the diameter of the tip. A chuck is slidably fitted thereinto, and an engaging portion is provided on the inner circumferential surface of the spindle to engage with the outer circumferential surface of the chuck and reduce the diameter of the chuck when the chuck retreats, and a rear end is fitted into the spindle. A flanged tension portion formed at the tip of the operating rod inserted from the side is slidably fitted into the center hole of the chuck, which has a diameter-reduced portion at the rear end, thereby connecting the operating rod and the spindle. A first spring is installed in between to urge the operating rod to move backward, and a pressing cylinder that presses the rear surface of the chuck is slidably fitted around the operating rod in the spindle. , a second spring is installed between the chuck and the spindle to urge the chuck to move rearward, a stopper is provided on the spindle to restrict rearward movement of the pressing cylinder, and the tool is held. Sometimes, the elastic forces of the first and second springs are applied to the chuck to urge it to move backward, and when the tool is removed, the operating rod is moved forward against the elastic force of the first spring. The tool holding device for a spindle in a machining center is characterized in that the chuck is then moved forward and expanded by moving the pressing cylinder forward against the elasticity of the second spring.