| 摘要 |
A control device for a backhoe that moves four separate reversible hydraulic valves in any combination or all at the same time with only one human hand needed to manipulate said controls. These valves are controlled through an organized series of arms, levers, and push rods. Lever one 1 can pivot forward or backward, move up or down, push forward or pull backward, and move to the left or right. Lever two 2 pivots up or down at lever four 4, therefore lever one 1 moves with lever two 2 as a unit. Lever four 4 spins around lever three 3 with lever two 2 and lever one 1 as a unit. Lever three 3 pivots forward and backward taking lever four 4, lever two 2, and lever one 1 with it as a unit. Lever one 1 pivots forward or backward to actuate valve 20 through a number of pins, rods, and arms. As lever one 1 is moved up or down, it pivots lever two 2 causing valve 22 to be actuated, leaving valve 20 uninterrupted. As lever one 1 is pushed forward or backward it does cause lever four 4 to pivot forward or backward actuating valve 24, however, this does not cause lever two 2 to move up or down or lever one 1 to pivot forward or backward therefore keeping their respective valves from inadvertently actuating. As lever one 1 is moved to the left or right it spins lever two 2 and lever four 4 around lever three 3 causing bent arm 12 to actuate valve 26 without affecting the other valves.
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