| 摘要 |
PROBLEM TO BE SOLVED: To enable smooth and reliable detachability and maintenance of a transmission belt mechanism, by coaxially interlocking the input end of a first and second transmission belt mechanisms with a drive shaft of an engine portion, and arranging the output end symmetrically centered around the drive shaft above the upper side of a track belt revolving portion. SOLUTION: A drive shaft 76a of an engine 76 is arranged above a left side driving wheel 15 such that the input end side of first and second transmission belts mechanisms 125, 145 are coaxially interlocked with the drive shaft 76a. Also, the output end side of both transmission belt mechanisms 125, 145 are both arranged symmetrically front to back in a position above the upper side of a revolving portion of a track belt 16, with both transmission belt mechanisms 125, 145 respectively centered around the drive shaft 76a. Moreover, both transmission belts 140, 146 are arranged farther to the inside than the track belt 16. As a result, the track belt 16 does not cause difficulties during detachment and maintenance of each of the transmission belts 140, 146 of the first and second transmission belt mechanisms 125, 145, thereby enabling this work to be done smoothly and reliably.
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