| 摘要 |
PURPOSE:To lower the position of the center of gravity of a machine body and prevent the contact of a wheel-shaft part with the ground surface by keeping the lower-side of the wheel-shaft part higher from the ground surface by positioning an input shaft in the lower part in the center part of a transmission case between the right and left wheels. CONSTITUTION:An input shaft 3 in the longitudinal direction is bearing(4)-supported in the center part in the lateral direction of a wheel transmission case 2, and a wheel shaft 5 which extends to the right and left sides over the input shaft 3 and receives the transmission from the input shaft 3 and revolves a wheel 1 is bearing(6)-supported in the both side parts. Therefore, the interlocking through the input shaft 3 applied with a driving force is transmitted to the right and left wheels 1 and 1 by the wheel shaft 5 and driving-traveling is performed. Since the input shaft 3 is positioned at the lower position in the center part of the transmission case 2 between the right and left wheels 1 and 1, the position of the center of gravity of the machine body can be lowered. Further, the wheel shafts 5 and 5 which extend in the lateral direction are positioned over the input shaft 3. |
