| 摘要 |
PURPOSE:To easily perform a series of steering, forward-backward movement and shift operation of a tracked vehicle with a steering valve for turning control and a transmission valve for control over the forward-backward movement and traveling speed. CONSTITUTION:On a forked yoke 2 installed on a shaft for an operator in a transversely rotatable manner, a crucial member 10 is installed on a pin 11 in a longitudinally rotatable manner, and then a control lever shaft 20 is also pivoted to the crucial member 10 so tatably in front and rear direction. In addition, a lever 4 to be connected to a steering valve is attached to a turning shaft 3 of the forked yoke 2. A ball joint 12 to be connected to a transmission valve for forward-backward movements is installed in the crucial member 10. In succession, a knob 21 attached to an upper end of the control lever shaft 20 and a lever 22 to be connected to a transmission valve for gearshifting to the lower end, respectively. When the knob 21 is tilted and left, a vehicle turns right and left, and in this constitution, the knob 21 is tilted in front and in the rear and thereby a forward-backward changeover takes place, then this knob 21 is rotated right and left, thereby performing a shift speed changeover into first, second and third gears. |
