Title:
X-RAY TUBE APPARATUS AND X-RAY CT APPARATUS
Document Type and Number:
Japanese Patent JP2017091881
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an X-ray tube apparatus that is configured to be capable of suppressing slippage in the circumferential direction of an outer ring even when the anode of the X-ray tube apparatus becomes large, and to provide an X-ray CT apparatus having the X-ray tube apparatus mounted therein.SOLUTION: An X-ray tube apparatus includes an anode for radiating X-rays upon irradiation of an electron beam thereto, a rotary shaft portion serving as a rotary shaft of the anode, plural rotary bearings which rotatably support the rotary shaft portion with respect to a fixed portion, have outer rings and inner rings sandwiching bearing balls therebetween and are arranged in the direction of the rotational axis of the rotary shaft portion, an inner preload spring which is disposed between the plural rotary bearings and preload the rotary bearings in the direction of the rotation axis, an outer preload spring for preloading at least one outer ring of the plural rotary bearings in the direction of the rotation axis, and a spacer that is disposed between the inner preload spring and rotary bearings which the outer preload spring preloads, and is fixed to the fixed portion.SELECTED DRAWING: Figure 3
Inventors:
TERAO TOSHIHIKO
Application Number:
JP2015222387A
Publication Date:
May 25, 2017
Filing Date:
November 12, 2015
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H01J35/10; F16C19/18; F16C25/08
Attorney, Agent or Firm:
Naotaka Tamura