| CPC B60K 26/02 (2013.01) [B60K 1/02 (2013.01); B62D 11/04 (2013.01); B62D 55/065 (2013.01); B66F 11/042 (2013.01); B60K 2026/029 (2013.01)] | 8 Claims |
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1. A traveling operation device of self-propelled crawler-type aerial work platform, comprising:
a left side crawler and a right side crawler as traveling devices;
an undercarriage including a left side motor and a right side motor, the left side motor and the right side motor independently driving the left side crawler and the right side crawler, respectively; and
a deck configured to move up and down above the undercarriage, wherein
the traveling operation device includes:
a control panel disposed on the deck;
an operation rod disposed on the control panel; and
a controller that controls rotations of the left side motor and the right side motor according to an operation of the operation rod,
the operation rod includes:
an operation rod main body capable of tilt operation from a neutral position in a front-rear direction and a right-left direction;
an enable switch that enables the control of the left side and the right side motors by the controller based on the operation of the operation rod only while the enable switch is pressed, and
a changeover switch generating a switching command signal,
the enable switch is disposed at a position where the tilt is operable on the operation rod main body while the enable switch is pressed with fingers same as fingers gripping the operation rod main body on the operation rod main body, and
the changeover switch is disposed at a position where the changeover switch is simultaneously operable with the enable switch by the fingers same as the fingers gripping the operation rod main body while the operation rod main body is gripped and the tilt operation is performed,
the controller:
performs usual travel control when the switching command signal is not received from the operation rod; and
stops the usual travel control when the switching command signal is received to transition to spin turn control,
in the usual travel control:
when the tilt operation is performed on the operation rod main body only in the front-rear direction without the tilt operation in the right-left direction, the left side motor and the right side motor are caused to rotate at a basic rotation speed preset as a rotation direction and a rotation speed common to the left side motor and the right side motor corresponding to respective positions of neutral, front inclination, and rear inclination of the operation rod main body; and
when the tilt operation is performed on the operation rod main body in the right-left direction while the tilt operation is performed on the operation rod main body in the front-rear direction, the rotation speeds of the left side motor and the right side motor are corrected such that the crawler-type aerial work platform performs a turning operation in a direction corresponding to the tilt operation in the right-left direction of the operation rod main body, and
in the spin turn control, the left side motor and the right side motor are caused to rotate in mutually opposite directions.
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