Function expanding device of control handle of full-electric-control hydraulic excavator

Abstract

The utility model discloses a function expanding device of a control handle of a full-electric-control hydraulic excavator, and belongs to the technical field of engineering machinery. The defects that in the prior art, due to the fact that a traditional bucket rod operation handle and a traditional dozer blade operation handle are arranged separately, operation is inconvenient, and the design cost is high are overcome. A main body structure of the hydraulic control system comprises a control handle, a controller, a display, a pilot electromagnetic valve, a main pump, a pilot pump and a main control valve, a change-over switch is arranged on the control handle, the controller is connected with the change-over switch, the display and an electromagnetic signal end of the pilot electromagnetic valve, and the pilot pump is connected with a hydraulic control signal end of the main control valve through the pilot electromagnetic valve. The main pump is connected with the executing mechanism through the main control valve. The utility model is mainly applied to engineering machinery such as excavators and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a function expansion device for a control handle of a fully electronically controlled hydraulic excavator. Background Art

[0002] The existing hydraulic excavator has two control handles, which can only control eight actions of four functions, namely, the lifting and lowering of the boom, the extension and retraction of the bucket arm, the digging and unloading of the bucket, and the left and right rotation. The bulldozer cannot be controlled, and the bulldozer is controlled by another separate handle. Therefore, the existing structure is inconvenient to operate, and the control handle of the bulldozer occupies a certain space in the cab, making the originally small cab space more crowded, making the driver feel uncomfortable in the cab, and the design cost of the existing structure is also high.

[0003] For example, a Chinese utility model patent with authorization announcement number CN 203531042 U discloses a function expansion device for a hydraulic excavator servo handle, which divides the control oil of the servo handle into two after passing through an electromagnetic reversing valve, and enters the boom valve block and the bulldozer valve block of the main valve respectively, so that the handle originally controlling the boom can be used to control the operation of the bulldozer after switching. The switching button is located at the head of the servo handle, which is a point-type structure, that is, when not pressed, it has the original function of the boom, when pressed, it has the function of the bulldozer, and when released, it automatically restores the function of the boom. However, its disadvantage is that it cannot realize the safety anti-stuck function through hydraulic control, and the boom handle may be activated and switched regardless of whether it returns to the middle position. If it switches when it is not in the middle position, it is easy to cause a dangerous situation of large movement after releasing the handle. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a function expansion device for a fully electronically controlled hydraulic excavator operating handle.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] A function expansion device for a fully electronically controlled hydraulic excavator joystick comprises a joystick, a controller, a display, a pilot solenoid valve, a main pump, a pilot pump and a main control valve. The joystick is provided with a switching switch. The controller is connected to the switching switch, the display and the electromagnetic signal end of the pilot solenoid valve. The pilot pump is connected to the hydraulic control signal end of the main control valve via the pilot solenoid valve. The main pump is connected to the actuator via the main control valve.

[0007] Preferably, the actuator includes an arm cylinder and a bulldozer cylinder, the main control valve includes an arm linkage control valve and a bulldozer linkage control valve, the arm linkage control valve is connected to the arm cylinder, and the bulldozer linkage control valve is connected to the bulldozer cylinder.

[0008] Preferably, the pilot solenoid valve includes a boom-linked solenoid valve and a bulldozer-linked solenoid valve, the boom-linked solenoid valve is connected to the hydraulic control signal end of the boom-linked control valve, and the bulldozer-linked solenoid valve is connected to the hydraulic control signal end of the bulldozer-linked control valve.

[0009] Preferably, the switch is arranged on the top of the operating handle, and the switch is a momentary switch button.

[0010] Preferably, the display is provided with a bulldozing mode and an excavation mode.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model adds a jog switch button to the arm operating handle of the existing joystick, and the switch button is located on the top of the arm operating handle. When the switch button is not pressed, the arm operating handle maintains the original operating function; when the switch button is pressed, the arm operating handle is converted to the bulldozer operating handle function, which can control the bulldozer; when the switch button is released, the operating handle automatically returns to the arm operating function. Therefore, the utility model cancels the existing bulldozer operating handle in the cab, making the cab more spacious and improving the comfort of the cab. At the same time, since the arm operating handle and the bulldozer operating handle are combined into one, the handle function can be switched with one button, and the driver is more convenient and flexible in operation. It has a simple structure, convenient operation, space saving, cost reduction, and strong practicality.

[0013] 2. The controller can be used to ensure that when the handle is not in the middle position, in the bulldozer mode, releasing the switch will not switch to the excavation mode, so as to avoid accidental release of the switch when the whole machine is in a bulldozer action, causing a large movement of the bucket arm, which may cause a safety risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the principle diagram of the utility model;

[0015] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0016] In the figure: 1. Control handle; 2. Controller; 3. Display; 4. Pilot solenoid valve; 5. Arm-linked control valve; 6. Arm cylinder; 7. Bulldozer cylinder; 8. Bulldozer-linked control valve; 9. Main pump; 10. Pilot pump; 11. Switch; 12. Main control valve; 41. Arm-linked solenoid valve; 42. Bulldozer-linked solenoid valve. DETAILED DESCRIPTION

[0017] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0018] Embodiment 1:

[0019] like Figure 1-2 As shown, a function expansion device of a fully electronically controlled hydraulic excavator joystick includes a joystick 1, a controller 2, a display 3, a pilot solenoid valve 4, a main pump 9, a pilot pump 10 and a main control valve 12. A switching switch 11 is provided on the joystick 1, the controller 2 is connected to the switching switch 11, the display 3 and the electromagnetic signal end of the pilot solenoid valve 4, the pilot pump 10 is connected to the hydraulic control signal end of the main control valve 12 through the pilot solenoid valve 4, and the main pump 9 is connected to the actuator through the main control valve 12.

[0020] The utility model controls the functions of the joystick used for a fully electric excavator through a program, so that the original joystick for controlling the bucket rod can be used to control the operation of the bulldozer after switching. The switching switch 11 is located at the top of the joystick 1 and is a jog-type structure, that is, it is the function of the bucket rod when not pressed, and it is the function of the bulldozer when pressed, and the function of the bucket rod is automatically restored when released. During operation, the hand grasps the joystick joystick and the thumb presses the conversion button on the top of the joystick joystick to easily operate. The button is a jog-type structure, that is, it is the original function of the bucket rod when not pressed, and it is the function of the bulldozer when pressed, and the function of the bucket rod is automatically restored when released, and the switching can only be activated after returning to the middle position, and the switching is not satisfied if it is not in the middle position, so as to prevent the danger of large movements after letting go. The utility model has the advantages of simple structure, convenient operation, space saving, cost reduction and strong practicality.

[0021] Embodiment 2:

[0022] A function expansion device for a fully electronically controlled hydraulic excavator joystick, which differs from Example 1 in that the actuator includes a boom cylinder 6 and a bulldozer cylinder 7, and the main control valve 12 includes a boom linkage control valve 5 and a bulldozer linkage control valve 8, the boom linkage control valve 5 is connected to the boom cylinder 6, and the bulldozer linkage control valve 8 is connected to the bulldozer cylinder 7.

[0023] Furthermore, the pilot solenoid valve 4 includes a boom-linked solenoid valve 41 and a bulldozer-linked solenoid valve 42 . The boom-linked solenoid valve 41 is connected to the hydraulic control signal end of the boom-linked control valve 5 , and the bulldozer-linked solenoid valve 42 is connected to the hydraulic control signal end of the bulldozer-linked control valve 8 .

[0024] Furthermore, the switch 11 is arranged on the top of the operating handle 1, and the switch 11 is a momentary switching button.

[0025] Furthermore, the display 3 is provided with a bulldozing mode and an excavation mode.

[0026] The working principle of the utility model is:

[0027] Without pressing the switch 11, the driver pushes the operating handle 1 forward to give the controller 2 an excavation signal, the display 3 displays the excavation mode, the controller 2 transmits the excavation signal to the pilot solenoid valve 4, the pilot pump 10 supplies oil to the boom linkage solenoid valve 41, controls the boom linkage control valve 5 to move right, the boom linkage control valve 5 works in the left position, and the hydraulic oil flows from the main pump 9 to the small chamber of the boom cylinder 6. At this time, the action is to swing the boom outward. Similarly, the operating handle 1 is pulled back to give the controller 2 an excavation signal. The controller 2 transmits the excavation signal to the pilot solenoid valve 4, and the pilot pump 10 supplies oil to the x port of the boom linkage solenoid valve 41 to control the boom linkage control valve 5. When the lever is shifted to the left, the arm-linked control valve 5 works in the right position, and the hydraulic oil flows from the main pump 9 to the arm-linked cylinder 6 cavity. At this time, the final effect is to retract the lever. When the switch 11 is pressed, the control handle 1 is pushed forward to give the controller 2 a bulldozing signal, and the display 3 displays the bulldozing mode. The controller 2 transmits the bulldozing signal to the pilot solenoid valve 4, and the pilot pump 10 supplies oil to the x1 port of the bulldozer-linked solenoid valve 42, controlling the bulldozer-linked control valve 8 to move to the left, and the bulldozer-linked control valve 8 works in the right position. The hydraulic oil flows from the main pump 9 to the bulldozer-linked cylinder 7 cavity. At this time, the bulldozer is lowered. For the same reason, the final effect of pulling the control handle 1 backward is to lift the bulldozer. Among them, the controller 2 will determine whether the control handle 1 is in the middle position. If it is not in the middle position and is in the bulldozer mode, releasing the switch 11 will not be able to switch back to the lever function, so as to avoid accidental release when the whole machine is in motion and cause safety risks.

Claims

1. A function expansion device for a fully electronically controlled hydraulic excavator joystick, characterized in that: The invention comprises a joystick (1), a controller (2), a display (3), a pilot solenoid valve (4), a main pump (9), a pilot pump (10) and a main control valve (12); the joystick (1) is provided with a switching switch (11); the controller (2) is connected to the switching switch (11), the display (3) and the electromagnetic signal end of the pilot solenoid valve (4); the pilot pump (10) is connected to the hydraulic control signal end of the main control valve (12) through the pilot solenoid valve (4); and the main pump (9) is connected to the actuator through the main control valve (12).

2. The function expansion device of the fully electronically controlled hydraulic excavator joystick according to claim 1 is characterized in that: The actuator comprises a boom cylinder (6) and a bulldozer cylinder (7); the main control valve (12) comprises a boom linkage control valve (5) and a bulldozer linkage control valve (8); the boom linkage control valve (5) is connected to the boom cylinder (6), and the bulldozer linkage control valve (8) is connected to the bulldozer cylinder (7).

3. The function expansion device of the fully electronically controlled hydraulic excavator joystick according to claim 2 is characterized in that: The pilot solenoid valve (4) comprises a boom-linked solenoid valve (41) and a bulldozer-linked solenoid valve (42); the boom-linked solenoid valve (41) is connected to a hydraulic control signal end of a boom-linked control valve (5); and the bulldozer-linked solenoid valve (42) is connected to a hydraulic control signal end of a bulldozer-linked control valve (8).

4. The function expansion device of the fully electronically controlled hydraulic excavator joystick according to any one of claims 1 to 3, characterized in that: The switch (11) is arranged on the top of the operating handle (1), and the switch (11) is a jog-type switch button.

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