| 摘要 |
The present invention provides an attachment with an improved structure. The attachment comprises a coupling unit, which receives torque by being coupled to a main spindle; and a processing unit, which delivers the torque delivered to the coupling unit to a tool to be orthogonal to the tool by clamping the tool. The coupling unit comprises a stud, which is clamped with the main spindle; a coupling guide unit, which accommodates the stud and is coupled to and fixed to the main spindle, and which receives torque from the main spindle; an upper curvic-coupling, which is coupled with the coupling guide unit and rotates along with the coupling guide unit; a cylinder unit, which moves upwards and downwards along the outer circumferential surface of the coupling guide unit by hydraulic pressure; a shaft unit, which moves upwards and downwards by being coupled with the inner circumferential surface of the cylinder unit and delivers torque to the processing unit; and a lower curvic-coupling, which is coupled with the shaft so that the shaft unit can deliver torque to the shaft unit by being coupled with the upper curvic-coupling when the shaft unit moves upwards and downwards. |
