| 摘要 |
A hand-held control device for a V-blade plow in which left and right plow blade wings are pivotally mounted on a vertical pivot on a vehicle mounting frame and actuated about the vertical pivot by electric switch-controlled hydraulic actuators, there being an electric switch to control the extension of a hydraulic actuator, respectively, and an electrical switch for controlling retraction of the hydraulic actuator, respectively. Each electrical switch has an associated thumb actuator, the thumb actuators being in an array so that an operator's thumb or finger can actuate two thumb actuators simultaneously while gripping the hand-held control device with the same hand. The plow includes a third hydraulic actuator for raising and lowering the frame relative to ground and an electric switch pair for controlling extension and retraction, respectively, of the third hydraulic actuator. There are first, second, third, fourth and fifth thumb actuators and their associated first, second, third, fourth, fifth and sixth electrical switches in the array and the common actuator. Actuation of the switches result in wing positionings according to the following schedule: extend right wing, actuate first switch; retract right wing, actuate second switch; extend left wing, actuate third switch; retract left wing, actuate fourth switch; angle right, actuate first and second switches; angle left, actuate third and fourth switches; scoop, actuate first and third switches; VEE, actuate fourth and second switches; raise, actuate fifth switch; and lower, actuate sixth switch.
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