| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotating shaft support structure for a tunnel excavator capable of receiving a large load. 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 34 arranged between the outer ring 32 and the inner ring 33; and a plurality of cage segments 11a etc. having pockets for holding the plurality of tapered rollers 34 and arranged sequentially connected in a circumferential direction between the outer ring 32 and the inner ring 33. The tapered rollers 34 are arranged between the two adjacent cage segments 11b, 11c or the like except between the first cage segment 11a and the last cage segment connected in the circumferential direction. COPYRIGHT: (C)2008,JPO&INPIT
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