TOOL GRIPPING MECHANISM

摘要

A tool gripping mechanism includes a tool holder and a shaft to which the tool holder is attached. The shaft is fixed to a rotary shaft of a spindle device. A plurality of magnets are disposed in pairs on concentric circles on surfaces of the tool holder and the shaft which face each other. When the tool holder is in a specific phase with respect to the shaft, the magnets of the tool holder and the magnets of the shaft attract each other, and the tool holder is aligned with respect to the shaft in that phase.

主权项

1. A tool gripping mechanism comprising:
a tool holder to which a tool can be attached; and a shaft to which the tool holder is attached, the shaft being fixed to a rotary shaft of a spindle device, wherein the tool holder and the shaft include a first surface and a second surface, respectively, the first and second surfaces facing each other, at least two magnets are disposed in the first surface of the tool holder, and at least one of the at least two magnets has pole directions different from those of the other of the at least two magnets, and magnets are disposed in the second surface of the shaft to be located at positions corresponding to the magnets disposed in the first surface and to generate magnetic forces in directions in which the magnets disposed in the first surface are attracted.