| 摘要 |
<p>PURPOSE:To reduce the turning radius by installing a steering apparatus which hardly steers the wheels on the grounding working machine installation side in the small steering-angle operation of a steering wheel and steers the wheels on the opposite side to the grounding work machine installation side in the reverse direction in the large steering-angle operation. CONSTITUTION:In a working machine 1 such as agricultural tractor, a sector gear 36 having a bell-crank-shaped lever 41 integrally installed onto a supporting shaft 37 is engaged with a pinion 35 which revolves in interlocking with the turning operation of a steering wheel, and a front-wheel tie-rod 23 is pivotally installed at the front half part of the lever 41. One edge of a bell-crank-shaped arm 47 having a rear-wheel tie-rod 28 pivotally installed is connected to the rear half part of the lever 41 through a link 51. The rear half part of the lever 41 is formed into a part 44 in U-form, and a crankshaft 53 is axially support onto said part 44. The front edge part of the link 51 is pivotally installed onto the crank pin 55 on the crankshaft 53, and a planetary gear 56 formed onto the crank pin 54 is engaged with a sector-gear-shaped sun gear 57 integrally formed with a gear box 34.</p> |
