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Working bucket leveling system of aerial work vehicle

A high-altitude operating vehicle and working technology, which is applied in the direction of servo motors, lifting devices, servo motor components, etc., can solve the problems of inconvenient control of leveling, slow system response, and lagging of leveling, so as to achieve accurate and fast leveling actions and control Simple, easy-to-control effects

Active Publication Date: 2019-07-30
XUZHOU HANDLER SPECIAL VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned leveling system has the following technical defects: 1), when the single amplitude-changing action or the telescopic and amplitude-changing compound action, the system is a constant pressure system, so the outlet pressure of the constant pressure difference variable pump 13 is always kept at the maximum value, which is different from the Compared with the load sensitive system, the energy consumption is large; 2), the leveling action of the working bucket will cause the phenomenon of slow system response and leveling lag; 3), the pressure difference between the two ends of the electromagnetic proportional valve in the leveling valve changes with the load change, Therefore the leveling of working bucket 8 is not easy to control

Method used

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  • Working bucket leveling system of aerial work vehicle
  • Working bucket leveling system of aerial work vehicle
  • Working bucket leveling system of aerial work vehicle

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Experimental program
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Effect test

Embodiment 1

[0027] Such as image 3 As shown, a working bucket leveling system of an aerial work vehicle includes a constant pressure difference variable pump 23, a main valve 28, a leveling valve 29, a telescopic cylinder 34, a luffing cylinder 33 and a leveling cylinder 37; the constant pressure difference variable The pressure oil port P of the pump 23 is connected with the pressure oil port P of the main valve 28, the load feedback oil port LS of the constant pressure difference variable pump 23 is connected with the load feedback oil port LS of the main valve 28, and the hydraulic oil enters the telescopic oil cylinder 34 and the transformer through the main valve 28 The oil cylinder 33 controls the telescopic action and the luffing action; the pressure oil port P1 of the main valve 28 is connected with the pressure oil port P of the leveling valve 29, and the oil return port T1 of the main valve 28 is connected with the oil return port T of the leveling valve 29 The hydraulic oil en...

Embodiment 2

[0035] A working bucket leveling system of an aerial work vehicle, comprising a constant pressure difference variable pump 23, a main valve 28, a leveling valve 29, a telescopic oil cylinder 34, a luffing oil cylinder 33, and a leveling oil cylinder 37; the constant pressure difference variable pump 23 pressure The oil port P is connected to the pressure oil port P of the main valve 28, the load feedback oil port LS of the constant pressure difference variable pump 23 is connected to the load feedback oil port LS of the main valve 28, and the hydraulic oil enters the telescopic oil cylinder 34 and the luffing oil cylinder 33 through the main valve 28 Thereby controlling telescopic action and luffing action; the pressure oil port P1 of the main valve 28 is connected with the pressure oil port P of the leveling valve 29, the oil return port T1 of the main valve 28 is connected with the oil return port T of the leveling valve 29, and the hydraulic pressure The oil enters the level...

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Abstract

The invention discloses a work bucket leveling system of an aerial work vehicle, wherein the main valve can be a cartridge valve or a multi-way valve; the maximum load pressures on the telescopic oil cylinder and the luffing oil cylinder are both fed back to the load of the constant pressure difference variable pump Sensitive oil port LS; There is a reversing valve on the oil circuit connecting the main valve pressure oil port P and the leveling valve pressure oil port P. When the reversing valve is in the spring position, the pressure of the pressure oil port P of the leveling valve is Zero, when the reversing valve changes direction, the pressure oil port P of the constant pressure difference variable pump is connected to the P port of the leveling valve through the speed control valve, and the pressure of the P port of the leveling valve is connected to the oil outlet of the reversing valve. The one-way valve feeds back to the load-sensing port LS of the constant pressure differential variable pump. The leveling of the working bucket of the invention is easy to control, the leveling action has no lag, the system responds quickly, and the system is always a load-sensitive system, thereby saving energy and reducing consumption.

Description

technical field [0001] The invention relates to a leveling system of an engineering vehicle, in particular to a working bucket leveling system of an aerial work vehicle, and belongs to the technical field of engineering machinery hydraulic control. Background technique [0002] Aerial work vehicle is a kind of equipment that transports staff and equipment to a designated height for operation. It belongs to special operation equipment. Its structure is as follows: figure 1 As shown, it includes chassis 1, turntable 2, luffing oil cylinder 3, telescopic oil cylinder 4, basic arm 5, two-section arm 6, leveling oil cylinder 7 and working bucket 8, luffing oil cylinder 3 drives the boom to change the amplitude, and telescopic oil cylinder 4 The expansion and contraction of the drive boom, the leveling cylinder 7 is used to adjust the angle of the working bucket 8. [0003] When the aerial work vehicle is working, the working bucket 8 is required to be kept parallel to the horizo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66F11/04B66C23/693B66C23/82F15B11/16F15B13/06
CPCB66C23/705B66C23/828B66F11/046F15B11/16F15B13/06F15B2013/004F15B2211/20546F15B2211/71F15B2211/30595F15B2211/40515F15B2211/40569F15B2211/41509F15B2211/50563F15B2211/5157F15B2211/6658F15B2211/7053F15B2211/7057F15B2211/7142
Inventor 董洪月耿艳杰胡景清陈时妹朱赛
Owner XUZHOU HANDLER SPECIAL VEHICLE