System for accurately controlling the rotation of excavation end of loader digger

A backhoe loader and control system technology, applied in mechanically driven excavators/dredgers, etc., can solve the problems of seal impact, inaccurate positioning, difficult control, etc., and achieve the effect of improving service life

Inactive Publication Date: 2014-04-16
JIANGSU LIUGONG MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alternating and rapid rise of the oil pressure will cause a huge impact on the seal of the rotary cylinder, affecting the service life of the seal and causing oil leakage of the rotary cylinder; this kind of back and forth swing will cause difficulty in control, inaccurate positioning, and it is difficult to realize the rotation precise control of

Method used

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  • System for accurately controlling the rotation of excavation end of loader digger

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Embodiment Construction

[0008] As shown in the figure, a backhoe loader digging end rotation precision control system includes a left cylinder 1, a right cylinder 2, a reversing valve 3, the small chamber of the left cylinder 1 and the large chamber of the right cylinder 2 connected, the large cavity of the left cylinder 1 is connected with the small cavity of the right cylinder 2, and the large chambers of the left cylinder 1 and the right cylinder 2 are respectively connected with the two reversing oil ports of the reversing valve 3, The large chamber oil circuits of the left oil cylinder 1 and the right oil cylinder 2 are respectively provided with a pressure switch 4, and the two oil circuits are connected by an oil circuit with a throttle valve 5 and a solenoid valve 6; the two pressure switches 4. Control the solenoid valve 6 through the delay relay 8 respectively. When the digging end turns back to the pointing position, the reversing valve 3 is operated to cut off the oil supply and return ci...

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Abstract

A system for accurately controlling the rotation of the excavation end of a loader digger comprises a left side oil cylinder, a right side oil cylinder and a reversing valve, wherein the small cavity of the left side oil cylinder is connected with the large cavity of the right side oil cylinder; the large cavity of the left side oil cylinder is connected with the small cavity of the right side oil cylinder; the large cavities of the left and the right side oil cylinders are connected with two reversing oil parts of the reversing valve respectively; a pressure switch is arranged in the oil circuit of the large cavity of each oil cylinder; the two oil circuits are connected with each other through an oil circuit with a throttle valve and an electromagnetic valve; and the pressure switches are connected with the electromagnetic valve through delay relays respectively. The accurate control system benefits as follows: 1, static hydraulic braking is realized by balancing the pressure difference of the small and the larger cavities of the oil cylinders, so as to accurately control rotation; and 2, as the pressure switches control the rise of oil pressures in the oil cylinders caused by inertial impact, a sealing piece is protected effectively, and the service lives of the oil cylinders are prolonged.

Description

technical field [0001] The invention relates to a control system, in particular to a precise control system for excavating the excavating end of an excavating loader by using a rotary oil cylinder to control a slewing support to realize the rotation of the excavating boom. Background technique [0002] The front and rear ends of the backhoe loader are the loading end and the excavating end respectively, and the same whole machine can realize the functions of loading and digging, so it is commonly called "both ends are busy". [0003] At present, the rotation of the boom at the digging end of the backhoe loader is to promote the rotation of the slewing support through the slewing oil cylinder, and the slewing support drives the whole excavation boom to rotate. The rotary cylinder includes left and right rotary cylinders. The large and small cavities of the left and right rotary cylinders are cross-connected. When oil is supplied to the large cavity of one rotary cylinder, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F3/42E02F3/43
Inventor 陈建军周业小杜丹
Owner JIANGSU LIUGONG MACHINERY
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