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Work bucket leveling system of high-altitude operation car

A high-altitude working vehicle and working technology, which is applied to lifting devices, fluid pressure actuating devices, servo motors, etc., can solve the problems of inconvenient leveling control, slow system response, and leveling lag, and achieve accurate and fast leveling action. , Simple control, easy to control effect

Active Publication Date: 2018-10-16
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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  • Work bucket leveling system of high-altitude operation car
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  • Work bucket leveling system of high-altitude operation car

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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 a high-altitude operation car. A main valve can be a cartridge valve or a multi-way valve. Maximum load pressure of a telescopic oil cylinder and maximum load pressure of an amplitude-variable oil cylinder are both fed back to a load-sensitive oil port LS of a constant pressure drop variable pump. A reversing valve is arranged on an oil waywhere a pressure oil port P of the main valve and a pressure oil port P of a leveling valve are connected, when the reversing valve is located at a spring position, the pressure of the pressure oil port P of the leveling valve is zero, during reversing of the reversing valve, a pressure oil port P of the constant pressure drop variable pump communicates with the port P of the leveling valve through a speed-regulating valve, pressure of the port P of the leveling valve is fed back to the load-sensitive oil port LS of the constant pressure drop variable pump through a one-way valve connected tothe position of an oil outlet of the reversing valve. Leveling of a work bucket is convenient to control, the leveling action is free of lag, system response is rapid, meanwhile, the system is alwaysa load-sensitive system, and energy saving and consumption reduction are achieved.

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 Applications(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