| 摘要 |
PROBLEM TO BE SOLVED: To stably travel a trailer interlockingly with a tractor with a simple structure. SOLUTION: In this traction vehicle, the trailer 21 is connected to the tractor 20 driving rear wheels 26 by an engine to self-propel by use of a king pin coupler device 22 such that the trailer 21 can be pulled. A rear wheel 26 part of the tractor 20 is installed with a hydraulic pump-cum-motor 35, while a rear wheel 32 part of the trailer 21 is installed with a hydraulic pump-cum-motor 36. A point between the motors 35, 36 is connected to a loop-like hydraulic circuit in series.
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