Patent ID: 9707626
Date: 2017-07-18
CPC Classifications: B23B,Y10T

Claim:
1. A hole saw assembly with diameter no more than 30 mm, comprising: a hole saw having a threaded hole; a drill rod, wherein the drill rod comprises a drill head and a shank which is integrally extended from the drill head for being connected to an electric tool, and defining a circular groove at the shank; and a quick release device, wherein the quick release device is disposed with the hole saw; wherein the quick release device comprises: wherein the threaded portion of the drive body is engaged with the threaded hole of an end surface of the hole saw, wherein the sleeve is movably provided in the mounting hole of the ring, the drill rod is inserted in the hexagonal assembly hole and the bead of the drive body is fastened in the circular groove such that when the second connection portion of the drive body is mounted in the axial hole of the sleeve, the bead of the drive body is driven by the first connection of the sleeve and fastened in the circular groove so as to fasten the drill rod in the hexagonal assembly hole; when the first connection portion of the sleeve is driven to move away from the stopping portion of the drive body, the bead of the drive body is released and the drill rod is capable of sliding out of the hexagonal assembly hole.