| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotating shaft support structure for a tunnel excavator of excellent productivity. <P>SOLUTION: The rotating shaft support structure for the tunnel excavator comprises a cutter head having a cutter for excavating sediment; a rotating shaft provided with the cutter head at one end and rotated together with the cutter head; and a tapered roller bearing built in a fixed member to support the rotating shaft rotatably. The tapered roller bearing comprises an outer ring 32; an inner ring 33; a plurality of tapered rollers arranged between the outer ring 32 and the inner ring 33; a plurality of cage segments 11a, 11d having pockets for holding the tapered rollers and arranged sequentially connected in a circumferential direction between the outer ring 32 and the inner ring 33; and a spacer 26 arranged between the first cage segment 11a and the last cage segment 11d connected in the circumferential direction. <P>COPYRIGHT: (C)2008,JPO&INPIT |
