Patent ID: 6357973
Filing Date: 2002-03-19
Classification: B23B,Y10T

Abstract:
A connection device of a boring saw, said connection device connecting a rotating tool with a rotating body and a bit, the rotating body having an inner threaded portion and at least one locating hole, said connection device comprising:a shaft having a shaft hole for receiving one end of a bit, a connection portion located at one end of said shaft for connecting the rotating tool, an urging ring extending radially from a shank of said shaft and having at least one through hole extending along the longitudinal direction of said shaft, a first outer threaded portion located between said connection portion and said urging ring, and a second outer threaded portion located at a free end of said shaft and engaged with the inner threaded portion of the rotating body; a locating member comprising an annular portion fitted over said shaft, and at least one insertion pin extending longitudinally from said annular portion to insert into said through hole of said urging ring and the locating hole of the rotating body; a sleeve having a closed end which is provided with a through hole to receive said shaft, said urging ring, and said locating member; and a nut engaged with said first outer threaded portion of said shaft such that said nut urges said closed end of said sleeve to be in an intimate contact with the closed end of the rotating body.