| 摘要 |
PROBLEM TO BE SOLVED: To provide a combine harvester equipped with a travelling transmission including a travelling HST and a turning HST which have simple structures. SOLUTION: A travelling non-stage transmission (20) transmitting a driving force for travelling to a pair of right and left running crawlers (3) and a turning non-stage transmission (70) giving speed difference to a pair of right and left travelling crawlers (3) are provided. The travelling non-stage transmission (20) and the turning non-stage transmission (70) are set on a port block (22). A hydraulic circuit (22a) connecting a travelling variable displacement hydraulic pump (21) in the travelling non-stage transmission (20) with a travelling hydraulic motor (23) and a hydraulic circuit (22b) connecting a turning variable displacement hydraulic pump (71) in the turning non-stage transmission (70) with a turning hydraulic motor (73) are provided in the port block (22). The travelling non-stage transmission (20) and the turning non-stage transmission (70) are freely detachably mounted in a travelling transmission (19) as a single unit. COPYRIGHT: (C)2007,JPO&INPIT
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