| 摘要 |
PROBLEM TO BE SOLVED: To provide an iron wheel structure of a track working vehicle capable of ensuring the electric insulation between an inner wheel supported by an axle and an outer ring in direct contact with a rail, and reliably preventing any short circuit of right and left rails. SOLUTION: The inner metal ring 70 supported by the axle S and the outer metal wheel 80 located on an outer circumferential part of the inner wheel 70 and in contact with the rail R are not directly coupled with each other, but an intermediate wheel 90 formed of an insulating material is provided between the wheels 70 and 80, and the inner wheel 70 and the intermediate wheel 90, and the outer wheel 80 and the intermediate wheel 90 are respectively coupled with each other via bolts separated from each other (a first bolt B1 and a second bolt B2). These bolts are extended parallel to the axle S, and the first bolts B1 to couple the inner wheel 70 with the intermediate wheel 90, and the second bolts B2 to couple the outer wheel 80 with the intermediate wheel 90 are alternately and continuously disposed in a circular manner around the axle S.
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