JPS615548U - Quick-change rotary cutting tool holder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing a rotary cutting tool holder which is an embodiment of the present invention. FIG. 2 is a left side view of the holder. 10: Holder body, 12: End face (first end face), 14: Fitting protrusion, 16: End face (second end face), 18: Tapered hole, 2
0: Bolt hole, 22: Tool holder, 24: Tapered shaft,
26: Flange part, 32: Through hole (tool holding part), 38
: Plane, 40: Notch, 42: Projection, 48: Center drill (rotary cutting tool), 58: Clamper hole; 60: Female threaded hole, 62: Clamber, 68: Slope, 70: Projection, 74: Threaded member, 82: Pin hole, 84: Ejection pin.

Claims (1)

[Claims for Utility Model Registration] It has a disk shape as a whole, and has a fitting protrusion on the center line of the first end surface that can fit into the center hole of the main shaft of a machine tool or a member fixed thereto. A tapered hole whose diameter gradually decreases with distance from the second end surface is provided at a position on the center line of the second end surface opposite to the first end surface, and the portion surrounding the tapered hole is located at the center of the tapered hole. a holder body fixed to the main shaft or a member fixed thereto by bolts inserted through a plurality of bolt holes penetrating in parallel with the line; and a holder body fixed to the holder body at a position between the plurality of bolt holes. a clamper hole that is formed to penetrate in the radial direction from the outer circumferential surface to the tapered hole and whose portion close to the outer circumferential surface is a female threaded hole; a tapered shaft portion that can tightly fit into the tapered hole; and the tapered shaft portion. a flange portion that can be brought into close contact with the second end face when the tool is fitted into the tapered hole, and a tool holding portion that holds a rotary cutting tool; A cutout with parallel planes is formed, and a plurality of protrusions extending perpendicularly to the axis of the tapered shaft portion are formed on the plane of the cutout, and the surface facing the flange portion has an inclined surface inclined backward. a tool holder on which a plurality of protrusions are formed; a plurality of protrusions that are slidably but non-rotatably fitted into the clamper hole and that correspond to the plurality of protrusions on an end surface corresponding to the tapered shaft portion; a clamper that engages with the inclined surface of the protrusion of the lever and draws the tapered shaft portion into the tapered hole; a screw member that is screwed into a female threaded hole and that moves the clamper forward and backward by being rotated from the outside in both forward and reverse directions; and a portion of the second end surface of the holder body that is in close contact with the flange portion of the tool holder. is slidably fitted into a pin hole formed in parallel with the center line of the holder body and reaching the clamper hole, and when the clamper is retreated in a direction away from the tapered shaft portion by the screw member. and an ejector pin that is moved toward the flange portion by an ejector slope formed on the clamper and comes into contact with the flange portion to eject the tool holder from the tapered hole.