| 摘要 |
PROBLEM TO BE SOLVED: To effectively extract characteristics of a reaction force imparting element such as a viscoelastic body and improve operability of a brake pedal.SOLUTION: A braking device of a winch comprises: a brake 160 which brakes a winch drum 105; a brake pedal 141 which is disposed in a pressing operable manner to a vehicle body; a reaction force imparting element 148 which imparts reaction force to the brake pedal 141; a rotary link 145 which rotates interlocked with a pressing operation of the brake pedal 141; a brake control valve 122 which is connected to the rotary link 145 and allows secondary pressure to work to the brake 160 corresponding to the pressing operation of the brake pedal 141; and a tension spring 147 whose one end is attached to the vehicle body, the other end is attached to the rotary link 145, and which energizes the brake pedal 141 in the opposite direction from a pressing operation direction. The braking device is configured that the tension spring 147 expands as a pressing operation is performed to the brake pedal 141 and the shortest distance between the rotation center of the rotary link 145 and the central axis of the tension spring 147 becomes shorter. |
