Patent ID: 7284938
Filing Date: 2007-10-23
Classification: B23B,Y10T

Abstract:
1. A tool holder attachment structure, for removably securing a tool holder with a tool in a tapered attachment hole of main shaft of a machining tool, comprising: a shank having a tapered outer perimeter surface; said shank provided on said tool holder; a plurality of elastic engagement pieces abutting an outer perimeter surface of said tapered outer perimeter surface of said tool holder and being elastically deformable in a radial direction during a fitting; and a plurality of ring shaped grooves formed at said inner surface section of said attachment hole of said main shaft at a predetermined interval along an axial center of said main shaft, said plurality of ring shaped grooves and said plurality of elastic engagement pieces being arranged in an alternating manner along said axial center; said formation of said plurality of ring shaped grooves allowing said plurality of elastic engagement pieces to be integrally formed with said main shaft; said plurality of elastic engagement pieces disposed at an inner surface section of said tapered attachment hole of said main shaft; and said shank in said tapered attachment hole of said main shaft and said tool holder secured to said main shaft during said fitting with said plurality of elastic engagement pieces elastically deformed in said radial direction.