| 摘要 |
PROBLEM TO BE SOLVED: To enable an operator of a crawler type work vehicle with a rotation operation type steering wheel to surely recognize that the steering wheel is turned sufficiently to reach a turn control region where the rotation direction of the crawler type travel device on the inner side of the turn is switched to a reverse direction. SOLUTION: A camshaft 45 is pivotally fitted to a holder 42, parallel to a steering shaft 43, and a pinion gear 44 is fixed to the steering shaft 43. A fan-shaped gear 46 is fixed to the camshaft 45 and engaged with the pinion gear 44. Two coil parts 61a, 61a of a torsional coil spring 61 are fitted in two latch shafts 60, 60 provided near the camshaft 45. Both end parts 61b, 61b of the torsional coil spring 61 are located on the rotation track of an end face of the fan-shaped gear 46 and at the starting point Ps of a spin turn region. When the steering shaft 43 rotates and the fan-shaped gear 46 reaches the starting point Ps of the spin turn region, the fan-shaped gear 46 abuts against the torsional coil spring 61 and resistance is applied to the rotation of the fan-shaped gear 46.
|
