| 摘要 |
PURPOSE: To make possible accurate excitation without torsion and vibration in simple constitution by coupling an excitation shaft to a vibrating base through a bearing part coupling part providing a static pressure bearing and holding the excitation shaft by a hydraulic guide composed of the static pressure bearing. CONSTITUTION: An oil flow passage 2d and an oil discharge opening (pocket 2c ) are provided in a T-shaped bearing part 2b of one end of an excitation shaft 2, and a bearing part coupling part 4 is constituted by a press arm 4a fixed on the side face of the bearing part 2b and a vibrating base 1 and a removable press arm 4b . The coupling part 4 forms a static pressure bearing due to oil pressure between the pocket 2c , the inner face of the arm piece 4b and the side face of the vibrating base 1, and the excitation shaft 2 is coupled to a specified position of the vibrating base 1 with a gap of tensμm. In addition, a hydraulic guide fixed on the floor is mounted to the intermediate of the shaft 2, holds the shaft 2 by the static pressure bearing with the gap of tensμm due to oil pressure. The movement in only the direction of the shaft center of the shaft 2 is guided by the hydraulic guide 5. Thereby even at high band frequency, vibration without any strain is applied to the vibrating base 1 in simple constitution.
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