| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire roller capable of preventing insufficient driving force even in the case of a traveling on a rough road. SOLUTION: A differential gear 2 is composed of a drive gear 21 installed to an output shaft 15a connected to a rotating shaft for a hydraulic motor 15, a ring gear 22 engaged with the drive gear 21, a gear case 23 mounted on the ring gear 22, a pinion gear 25 integrally revolved with the gear case 23 in the gear case 23 and side gears 26 engaged with the pinion gear 25 and secured at each front end of two shafts 241 and 242 arranged in series. A recessed section 27 is formed around the hole 232 of the gear case 23, a projecting section 31 is formed at the edge section of the opening of a lock member 3 spline-fitted to the shaft 242, the lock member 3 is moved to the differential gear 2 side in the case of a difflock-on state and the projecting section 31 and the recessed section 27 are engaged.
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