JPH0329400Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a work machine control device for controlling blades, circles, etc. provided in a motor grader.

Conventional technology A conventional motor grader has two lifting cylinders at the rear end of the drawbar and a hydraulic motor in the circle, and these lifting cylinders and hydraulic motor are controlled by three operating levers. Use and control.

Problems that the invention aims to solve However, with the above-mentioned conventional control device, three operating levers must be operated at the same time as the steering operation, making the operation complicated, making the work dangerous and causing problems for the operator. There were problems such as early fatigue. This idea is intended to solve the above-mentioned problems.

Means and Effects for Solving the Problems: An operating lever that can be operated in at least six directions is provided near the driver's seat of the motor grader, and a rotatable knob is provided at the upper end of this operating lever, and the operating lever is supported. A detection means for detecting the operation direction of the operation lever and knob is provided in the operation box, and signals detected by these detection means are input to the control box,
A motor grader that controls the operation of the blade and circle by outputting a control signal from the control box to the solenoid valve provided for each lifting cylinder and hydraulic motor according to the operating direction of the operating lever and knob. Work equipment control device.

Embodiment An embodiment of this invention will be described in detail with reference to the drawings. In the figure, 1 is the working machine of the motor grader.
It has a drawbar 3 whose front end is supported at the front part of the front frame 2, and at the rear end of the drawbar 3,
The front frame 2 is connected to the front frame 2 via the support frame 4.
The lower ends of two lifting cylinders 5 ₁ and 5 2 supported by the cylinder 5 1 and 5 ₂ are connected.

Further, a circle 7 rotated by a hydraulic motor 6 is provided at the lower part of the rear end of the drawbar 3, and a blade 8 is attached to this circle 7.

On the other hand, 10 is an operating lever installed in the driver's cab of the motor grader (both not shown), and as shown in Figure 3, it can be operated in six directions, front and back and diagonally. A knob 11 is provided, and the operating direction of the operating lever 10 and the rotation angle of the knob 11 are detected by a detector (not shown) such as a potentiometer provided in the operating box 12. It's summery. In addition, position signals in eight directions detected by the detector are outputted to the control box 13, and a control circuit (not shown) in the control box 13 generates control signals according to the position signals.
A, E, O, F are solenoid valves 15, 16 provided for each lifting cylinder 5 and hydraulic motor ₅₁ , ₅₂ ,
17, and the lifting cylinders 5 ₁ and 5 ₂ and the hydraulic motor 6 are controlled as follows.

When the operating lever 10 is now operated in the direction, control signals A and C are output from the control box 13, the solenoid valve 15 is switched to position 15 ₁ , the solenoid valve 16 is switched to position 16 1, and each lifting cylinder 5 is switched to position 16 ₁ .
Since hydraulic pressure is supplied to the bottom side of blades ₁ and 5 ₂ , the blade 8 is lowered. Next, when the operation lever 10 is operated in the direction, control signals A and D are output from the control box 13, and the solenoid valves 15 and 16 are moved to positions 15 _{2 and} 15.
16 ₂ , hydraulic pressure is supplied to the rod side of each lifting cylinder 5 ₁ , 5 _{2 ,} and the blade 8 rises.

Next, when the operation lever 10 is operated in the direction, the control signal A is output from the control box 13, the solenoid valve 15 is set to the position 15 ₁ , and one of the lifting cylinders 5 ₁
is extended and the left end of the blade 8 is lowered, and when the operating lever 10 is operated in the direction, the control signal A is output and the solenoid valve 15 becomes position ₁₅₂ , and one of the lifting cylinders ₅₁ is contracted and the blade 8
The left edge of is raised.

Furthermore, when the operation lever 10 is operated in the direction, the control signal C is output, and when the operation lever 10 is operated in the direction, the control signal E is output, and the solenoid valve 16 is moved to the position 16 ₁ or 1.
6 ₂ , the other lifting cylinder 5 ₂ is expanded and contracted, and the right end side of the blade 8 is moved up and down.

On the other hand, when the knob 11 at the upper end of the operating lever 10 is rotated to the left, the control signal O is output, the solenoid valve 17 is set to position ₁₇₁ , the circle 7 is rotated to the left by the hydraulic motor 6, and the knob 11 is rotated to the right. When this happens, a control signal is output, and the solenoid valve 17 becomes position 17 ₂ , and the hydraulic motor 6 moves the circle 7.
will now be rotated to the right.

That is, the blade 8 is operated by one operation lever 10.
and the operation of the circle 7 can be controlled.

Effects of the invention As detailed above, this invention allows the vertical movement of the blade and the rotation of the circle to be controlled by a single operating lever, so while the steering operation is performed with one hand, the blade and circle can be operated with the other hand. can be controlled, the work can be done safely, and since no complicated operations are required, worker fatigue can be reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a perspective view of the working machine, Fig. 2 is a perspective view of the control system, Fig. 3 is an explanatory diagram showing the operating direction, and Fig. 4 is a circuit diagram of the same. be. 2 is the front frame, 3 is the drawbar, 5 ₁ ,
5 ₂ is a lifting cylinder, 6 is a hydraulic motor, 7 is a circle, 8 is a blade, 10 is an operation lever, 11 is a knob, 12 is an operation box, 13 is a control box, 15,1
6 and 17 are solenoid valves.

Claims (1)

[Scope of utility model registration request] The front end is supported by the front frame 2 of the motor grader, and the rear end has two lifting cylinders 5 ₁ , 5 ₂
A circle 7 that can be freely rotated by a hydraulic motor 6 is provided below the drawbar 3 that can be raised and lowered, and a blade 8 is attached to the lower side of the circle 7, and the blade 8 is installed near the driver's seat of the motor grader and can be operated in at least six directions. A rotatable knob 11 is provided at the upper end of the operating lever 10, and an operating direction of the operating lever 10 and knob 11 is provided in the operating box 12 that supports the operating lever 10. Detection means are provided, and signals detected by these detection means are input to the control box 13, and control signals are sent from the control box 13 to the lifting cylinders 5 ₁ , in accordance with the operating directions of the operating lever 10 and knob 11 5 ₂ and a solenoid valve 15, 16 provided for each hydraulic motor 6.
A work equipment control device for a motor grader which controls the operation of the blade 8 and the circle 7 by outputting to the output terminal 17.