WHEEL SUPPORTING STRUCTURE OF WORKING VEHICLE

PROBLEM TO BE SOLVED: To effectively reduce the cost of the structure by making a swing arm for a small-sized working vehicle to be usable also for a large-sized working vehicle. SOLUTION: The swing arm 14 to enable the vertical movement of a wheel 3 relative to a vehicle frame 2 is provided with a rotary part 14A supported by a supporting part 8A of the vehicle frame 2 in a manner to enable relative rotation around a lateral shaft axis X, an arm 14B extended from the rotary part 14A in the direction crossing the axis X, and an attaching part 14C positioned at the extended end of the arm 14B and attaching a wheel. An interlocking member 37 interlocking with an actuator 36 to swing the swing arm 14 is connected to the swing arm 14, and the connection part 62C of the interlocking member 37 to the swing arm 14 is formed to have a length extending from the rotary part 14A to the arm 14B and connected to the rotary arm 14A and the arm 14B. COPYRIGHT: (C)2008,JPO&INPIT