High frequency vibration spindle system with noncontact power transmission and method for manufacturing a restraining part used therein

A high frequency vibration spindle system with non-contact power transmission, comprising:

• a spindle;
• a toolholder detachably mounted on the spindle and adapted to engage with a tool;
• an electric power transmission device, including a first induction module and a second induction module spaced apart from each other with a gap, wherein the second induction module is disposed at the spindle or the toolholder, and the second induction module is adapted to receive an electric power from the first induction module in a non-contact electromagnetic induction manner;
• a transducer, adapted to be controlled to vibrate the tool and being disposed at the toolholder and electrically connected with the second induction module to receive the electric power;
• and
• a restraining member provided on the second induction module and located between the first induction module and the second induction module;
• wherein the restraining member includes at least one layer of a sheet shaped carbon fiber material wound around an exterior circumference of the second induction module, and the thickness of the restraining member is between 0.25 mm and 1.5 mm.