| 摘要 |
PROBLEM TO BE SOLVED: To operate a parking brake with small pedal effort by letting the brake be hydraulically operated with the stepping-on of a running clutch pedal. SOLUTION: In a combined harvester, the power of an engine is transmitted to an input shaft on the side of a transmission by way of a belt clutch, when a running clutch pedal 36 is operated so as to step on, the belt type clutch is operated so as to be disengaged, power transmission from the engine is shut off, concurrently, a change-over valve 59 is switched over based on an ON-signal from a sensing switch 57 which is actuated when the running clutch 36 is stepped on. Hydraulic oil is fed from a tank 66 by way of the change-over valve 59, a wet type clutch 64 disposed to an intermediate shaft is connected, and furthermore, a brake 62b disposed on the intermediate shaft is hydraulically operated. By this constitution, the brake is hydraulically applied to the intermediate shaft at a required stage, and it can be completed to step on the running clutch pedal 36 by much less force. |
