Patent ID: 8790054
Filing Date: 2014-07-29
Classification: B23B,B23Q,Y10T

Abstract:
1. A spindle attachment device for attachment to an end face of a spindle head engaging a spindle having an axial line, the attachment device comprising: a device body having an attachment surface detachably attached to the end face of the spindle head; engaging means for moving the device body in a direction of the axial line of the spindle to engage the spindle head and the device body with each other so as to freely restrict or release rotation of the device body with respect to the spindle head about the axial line of the spindle; spring means exerting a spring force for urging the device body so that the attachment surface of the device body is pressed onto the end face of the spindle head with the engaging means being ready for engagement; fluid pressure means for causing a fluid pressure to act on the attachment surface of the device body against the spring force of the spring means so that the engagement of the engaging means is released; and transmission means for transmitting rotation of the spindle to the device body with the fluid pressure of the fluid pressure means acting on the attachment surface of the device body.