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Lifting control system of loader moving arm and method

A technology of control system and motorized arm, applied in the direction of earth mover/shovel, construction, etc., can solve problems such as nodding impact, and achieve the effect of avoiding hydraulic impact

Inactive Publication Date: 2020-04-21
GUANGXI LIUGONG MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a loader arm lift control system and control method in view of the problem that the existing loader arm lift hydraulic control system will have a nodding impact when the boom starts to lift or stops

Method used

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  • Lifting control system of loader moving arm and method
  • Lifting control system of loader moving arm and method

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Embodiment Construction

[0021] The specific implementation will be described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, the arm lifting control system of the loader includes an electromagnetic reversing valve 4 , a boom cylinder 5 , a hydraulic pump 3 , an electric control handle 1 , a controller 2 , and a limit sensing device 6 .

[0023] The limit sensing device 6 is composed of an inductive proximity switch installed on the front frame 8 and an induction target metal fixed on the boom 7 (the induction target metal can also be a certain position on the boom). The inductive proximity switch is connected to the controller 2 through the boom position signal line X1. When the sensing target metal enters the sensing range of the inductive proximity switch, the inductive proximity switch is closed and turned on, and the controller detects that the inductive proximity switch is closed. The position signal associated with on is a limit signal, otherwise it is ...

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Abstract

The invention relates to a lifting control system of a loader moving arm and a control method. The problem that in an existing lifting hydraulic control system of a loader moving arm, nodding type impacting happens when the moving arm starts to be lifted or stops is solved. In the control system, the commutation control end of a solenoid directional valve, an electric control handle, a limiting induction device and the flow control end of an electric proportion variable displacement piston pump are connected with a controller; and the controller outputs the flow control current used for controlling flow towards the electric proportion variable displacement piston pump according to the position signal of the limiting induction device and the operation current of the electric control handle,and the controller outputs the valve opening and closing control current used for transposition of the solenoid directional valve towards the solenoid directional valve according to the operation current and flow control current of the electric control handle. The lifting motion in the moving arm lifting process is stopped through control over output of a hydraulic pump instead of the manner of directly returning the solenoid directional valve to the middle position from the reversing position, and therefore hydraulic impacting generated when the lifting action is started or stopped is avoided.

Description

technical field [0001] The invention relates to a loader hydraulic control system, more specifically, to a loader arm lifting control system and a control method. Background technique [0002] The existing loader arm lifting hydraulic system usually includes a variable pump, a control valve connected to the variable pump, a boom cylinder connected to the control valve and a pilot control device. The variable pump obtains a load signal from the control valve to control the output of the variable pump. The pilot control device controls the valve port opening and working position of the reversing valve. [0003] The loader needs to lift the boom to the highest position during the loading operation to avoid touching the railing of the car. In order to reduce the driver's work intensity, most of the loaders are equipped with the boom lifting automatic limit system, which basically adopts Gain and loss electric switch feedback control, that is, the signal of the limit device for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/20E02F9/22
CPCE02F9/2029E02F9/2037E02F9/226E02F9/2267E02F9/2292
Inventor 程观润翟春联吴玉姣
Owner GUANGXI LIUGONG MASCH CO LTD
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