Patent ID: 6615670
Filing Date: 2003-09-09
Classification: G01M,G01N

Abstract:
A high-speed rotation testing apparatus for rotating a test object to test at least one of strength and durability of the test object while rotating, the apparatus comprising:a spindle comprising a lower end that holds the test object; a driving motor that applies torque to the spindle, the driving motor comprising a rotor shaft that defines a through-hole configured to receive said spindle, a clearance between an inner diameter of said through-hole and an outer diameter of a lower portion of said spindle enables an oscillation of said spindle within said through-hole during rotation; a frame that supports the rotor shaft of the driving motor in a substantially vertical orientation; and a damping mechanism, configured to suppress the oscillation of said spindle within said through-hole; wherein an upper end of said spindle is coupled to an upper end of said rotor shaft, so that said driving motor directly drives said spindle.