| 摘要 |
PROBLEM TO BE SOLVED: To enable limp home operation (degeneracy operation) allowing a combine harvester to escape at least only from a field when abnormality in controlling means of a hydraulic stepless speed-changing mechanism for changing the power of an engine mounted on a traveling vehicle is caused. SOLUTION: The traveling vehicle includes the hydraulic stepless speed-changing mechanism for transmitting the power to right and left traveling parts, a straightly advancing operation device for operating the change of the straightly advancing speed of the traveling machine body 1, a turning operation device for operating the change of the advancing direction of the traveling machine body, electric actuators 272 and 270 for regulating the speed-changed output from the hydraulic stepless speed-changing mechanism, and the controlling means for driving the electric actuators 272 and 270 according to the operated amount of each operation device. Emergency manual operation devices 355 and 356 for manually operating the speed-changed outputs separately from the electric actuators 272 and 270 are installed in the hydraulic stepless speed-changing mechanism. COPYRIGHT: (C)2011,JPO&INPIT
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