Ultrasonic spindle device with automatic tool changer

An ultrasonic spindle device with automatic tool changer, comprising:

• a housing member having an inner space along a longitudinal direction of the housing member;
• a shaft member being rotatably disposed in the inner space and having a hollow portion;
• an ultrasonic oscillation member being disposed at a front in the hollow portion and having a through hole;
• a drawbar member being disposed in the hollow portion to be able to move in a front-rear direction, a portion of the drawbar member being inserted into the through hole and passing through the ultrasonic oscillation member;
• a clamping member being connected to a front end of the drawbar member and clamping a tool, a portion of the clamping member being disposed outside the housing member;
• a rotation means being positioned in the inner space and rotating the shaft member;
• and
• a cylinder member moving the drawbar member forward or backward along a longitudinal direction of the shaft member.