| 摘要 |
PROBLEM TO BE SOLVED: To provide transmission structure for a combine harvester in which the transmission structure can simply be changed from a state in which a reaping part changes speed with syntonization with a traveling speed change in both high-speed and low-speed travelings to a state in which the reaping part changes speed with syntonization with a traveling speed change in high-speed traveling and the reaping part does not make speed lower than set speed in low-speed traveling. SOLUTION: This transmission structure is equipped with a speed change transmission mechanism 50 for transmitting the output of a traveling speed change gear 45 to the driving shaft 42 of the reaping part and a constant-speed transmission mechanism 60 for transmitting the motive power of the driving shaft 41 of a thresher to the driving shaft 42 of the reaping part. When the clutch 63 of the constant-speed transmission mechanism 60 is engaged, in a high-speed traveling, a clutch 53 in one rotation direction of the speed change transmission mechanism 50 is engaged in transmission and a clutch 64 in one rotation direction of the constant-speed transmission mechanism 60 is made in a slip state and, in a low-speed traveling, the clutch 53 in one rotation direction of the speed change transmission mechanism 50 is made in a slip state and the clutch 64 in one rotation direction of the constant-speed transmission mechanism 60 is engaged in transmission. When the clutch 63 of the constant-speed transmission mechanism 60 is disengaged, the speed change transmission mechanism 50 is transmitted in both high-speed and low-speed travelings.
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