Machine tool lifting stability control method and system and tractor

A technology of smooth control and implements, applied in the field of tractors, can solve problems such as poor lifting and lowering stability of tractors, achieve the effects of good micro-motion control, improve response time, and reduce hysteresis

Pending Publication Date: 2022-08-09
XCMG AGRI EQUIP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a method, system and tractor for controlling the stability of the lifting and lowering of the implement, so as to solve the technical problem of the poor stability of the lifting and lowering of the tractor in the prior art

Method used

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  • Machine tool lifting stability control method and system and tractor
  • Machine tool lifting stability control method and system and tractor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a smooth control system for the lifting and lowering of the implement, the hydraulic principle diagram of which is as follows figure 1 As shown, it includes oil inlet 1, mechanical hydraulic output 2, electronically controlled hydraulic output 3, lift control 8, and the suspension cylinder in the suspension mechanism, including the oil tank, the main pump, the electromagnetic switch valve, the compensation valve 9, The ascending control solenoid valve 10, the first electromagnetic reversing valve 11, the first one-way valve, the descending control solenoid valve 12 and the suspension oil cylinder in the suspension mechanism; the inlet of the main pump is connected to the oil tank, and the outlet is sequentially connected with the electromagnetic switch valve and the compensation valve 9. The ascending control solenoid valve 10 and the first electromagnetic reversing valve 11, the outlet of the first electromagnetic reversing valve 11 is connected...

Embodiment 2

[0049] This embodiment provides a smooth control method for the lifting and lowering of an implement, based on the figure 1 The hydraulic schematic diagram shown is used for control, and the control methods of the above-mentioned smooth control system for lifting and lowering of the machine are provided under the four states (the machine is raised, the machine is lowered by its own weight, the machine is forced to fall, and the machine is floating). The control method can be continuous control or any combination, specifically:

[0050] When the mechanical hydraulic output coupling 2 and the electronically controlled hydraulic working coupling 3 do not work, when the lifting control coupling 8 works,

[0051] method one:

[0052] The Y7b of the electromagnetic switch valve is not energized. When the Y1b of the ascending control solenoid valve 10 is energized, the compensation valve 9 works in the left function position, and the Y3b of the first electromagnetic reversing valve ...

Embodiment 3

[0074] Based on the smooth control system for machine lifting according to Embodiment 1 and the method for smoothly controlling machine lifting according to Embodiment 2, this embodiment provides a tractor equipped with the machine lifting and lowering according to Embodiment 1. A smooth control system is provided, and based on the smooth control method of the implement lifting and lowering described in Embodiment 2, the implement is controlled to ascend and descend smoothly, and the automatic control of the hydraulic output of the tractor is realized.

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Abstract

The invention discloses a machine tool lifting stability control method and system and a tractor, and belongs to the technical field of tractors. An inlet of the main pump is connected with an oil tank, an outlet of the main pump is sequentially connected with an electromagnetic switch valve, a compensation valve, a rising control electromagnetic valve and a first electromagnetic reversing valve, an outlet of the first electromagnetic reversing valve is connected with a rod cavity and a rodless cavity of the suspension oil cylinder, and the first one-way valve is connected between the first electromagnetic reversing valve and the rodless cavity of the suspension oil cylinder. An inlet of the descending control solenoid valve is connected between a rodless cavity of the suspension oil cylinder and the first one-way valve, an outlet of the descending control solenoid valve is connected with an oil tank, and the first solenoid directional valve and the compensation valve are further provided with outlets connected with the oil tank. Stable control over ascending and descending of the machine tool is achieved, an electromagnetic directional valve is additionally arranged, a strong pressure mode of a hard land parcel and machine tool floating control are achieved, a compensation valve is arranged in a matched mode, output flow and pressure stability are achieved, and the combined automatic control over hydraulic output and machine tool ascending and descending and the field edge management function are achieved.

Description

technical field [0001] The invention relates to a method, a system and a tractor for the smooth control of the lifting and lowering of an implement, belonging to the technical field of tractors. Background technique [0002] In the actual work of the tractor, it is necessary to control the implement, which is generally realized by means of the tractor lifting system. For the hoisting system, there are mechanical hoisting system and electro-hydraulic hoisting system, which mainly realize the functions of lifting, lowering, floating and stopping of the machine. In field operations, strong pressure or floating control is required, and when reaching the field, up / down control of the implement is required. Various modes are used frequently. Due to the heavy weight of the machine, it is very important to control the lifting and lowering of the machine smoothly. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the deficiencies in the prior a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B1/26F15B11/08F15B13/02
CPCF15B1/26F15B11/08F15B13/02F15B13/026F15B13/027
Inventor 张洪波章跃赵博文张露云
Owner XCMG AGRI EQUIP TECH CO LTD
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