Control method in motor grader and motor grader

Abstract

A control method in a motor grader including a front frame provided with a front wheel, a rear frame pivotably coupled to the front frame and provided with a rear wheel, a pivot mechanism which is provided between the front frame and the rear frame and allows the front frame to pivot with respect to the rear frame, an operation portion, and a sensor capable of detecting whether or not the front frame is at a neutral position with respect to the rear frame includes outputting a control signal for driving the pivot mechanism in response to an operation command in accordance with a state of operation onto the operation portion and stopping output of the control signal in response to the operation command when the sensor detects the neutral position.

1 . A control method in a motor grader, the motor grader including a front frame provided with a front wheel, a rear frame pivotably coupled to the front frame and provided with a rear wheel, a pivot mechanism which is provided between the front frame and the rear frame and allows the front frame to pivot with respect to the rear frame, an operation portion, and a sensor capable of detecting whether the front frame is at a neutral position with respect to the rear frame, the control method comprising:
 outputting a control signal for driving the pivot mechanism in response to an operation command in accordance with a state of operation onto the operation portion; and   stopping output of the control signal in response to the operation command when the sensor detects the neutral position.   
     
     
         2 . The control method in a motor grader according to  claim 1 , the control method comprising:
 accepting stop of the operation command when the sensor detects the neutral position; and   outputting again the control signal in response to the operation command after the stop of the operation command is accepted.   
     
     
         3 . A motor grader comprising:
 a front frame provided with a front wheel;   a rear frame pivotably coupled to the front frame and provided with a rear wheel;   a pivot mechanism which is provided between the front frame and the rear frame and allows the front frame to pivot with respect to the rear frame;   an operation portion;   a sensor capable of detecting whether the front frame is at a neutral position with respect to the rear frame; and   a controller which controls the pivot mechanism,   the controller
 outputting a control signal for driving the pivot mechanism in response to an operation command in accordance with a state of operation onto the operation portion, and 
 stopping output of the control signal in response to the operation command when the sensor detects the neutral position. 
   
     
     
         4 . The motor grader according to  claim 3 , wherein
 the controller accepts stop of the operation command when the sensor detects the neutral position and outputs again the control signal in response to the operation command after the stop of the operation command is accepted.