Traveling control equipment of construction machine
First Claim
1. A traveling control equipment suitable for use with a construction machine having a hydraulic pump, left and right traveling hydraulic motors, and control valves arranged in hydraulic lines connecting the hydraulic pump and the traveling hydraulic motors together, said traveling control equipment comprising:
- a palm rest;
a mechanism for selectively holding said palm rest at neutral, forward, and rearward positions;
a position detector for providing a position signal responsive to a position of said palm rest;
a traveling pedal;
a control input detector for providing a pedal control signal responsive to a control input via said traveling pedal;
a left traveling knob and a right traveling knob;
a left control input detector for providing a left control input signal responsive to a control input via said left traveling knob;
a right control input detector for providing a right control input signal responsive to a control input via said right traveling knob; and
a controller for receiving said position signal, said pedal control signal, said left control input signal and said right control input signal, and outputting to said control valves forward or rearward speed signals for the left and right traveling hydraulic motors.
1 Assignment
0 Petitions
Accused Products
Abstract
According to the present invention, front visibility is improved, entry into a cab or exit therefrom by an operator is facilitated, fine operability by a traveling pedal is improved, and foot fatigue is decreased. To achieve this, when the palm rest (56) is detected in its neutral position N, forward or rearward speed signals for respective traveling hydraulic motors in response to detection signals of control input detectors (19a, 20a) of left and right traveling knobs (19, 20) are outputted to respective control valves from a controller (15). When the palm rest is not detected in its neutral position N, the larger one of the detection signals issued from these control input detectors (19a, 20a) is converted into the forward or rearward speed signals for the left and right traveling hydraulic motors (9, 10) in response to a detection signal of the control input detector (21a) of the traveling pedal (21), and a smaller detection signal issued from one of these control input detectors (19a, 20a) causes the controller (15 ) to output the forward or rearward speed signals for the left and right traveling hydraulic motors (9, 10) in accordance with a product of a ratio of the smaller detection signal to the larger detection signal and the detection signal issued from the control input detector (21a) of the traveling pedal (21), and the forward or rearward speed signals are outputted to respective control valves from the controller (15).
-
Citations
17 Claims
-
1. A traveling control equipment suitable for use with a construction machine having a hydraulic pump, left and right traveling hydraulic motors, and control valves arranged in hydraulic lines connecting the hydraulic pump and the traveling hydraulic motors together, said traveling control equipment comprising:
-
a palm rest; a mechanism for selectively holding said palm rest at neutral, forward, and rearward positions; a position detector for providing a position signal responsive to a position of said palm rest; a traveling pedal; a control input detector for providing a pedal control signal responsive to a control input via said traveling pedal; a left traveling knob and a right traveling knob; a left control input detector for providing a left control input signal responsive to a control input via said left traveling knob; a right control input detector for providing a right control input signal responsive to a control input via said right traveling knob; and a controller for receiving said position signal, said pedal control signal, said left control input signal and said right control input signal, and outputting to said control valves forward or rearward speed signals for the left and right traveling hydraulic motors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification