| 摘要 |
PROBLEM TO BE SOLVED: To lower costs by allowing a working vehicle having a front wheel speed increasing device respectively provided with braking devices at right and left axle shafts and the working vehicle without a front wheel speed increasing device to use a front axle housing in common. SOLUTION: With this speed increasing device, a unit case 44 respectively incorporating braking devices 49 between the right and left end parts of a front axle shaft 20 and a speed reducer 32, is detachably provided. When a link 57 is pulled in interlocked with the steering of a steering handle, an operating shaft 53 is rotated to allow a shifter 51 to slide a pressing piece 48, and the pressing piece 48 presses separator-plates 45, 45...and friction plates 46, 46... against a partition wall 47 to operate the braking device 49. When the turning inside braking device 49 is operated to brake an axle shaft 31, the rotating speed of the turning outside axle shaft 31 is increased by the differential action of a differential gear 30 to produce a front wheel speed increasing state.
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