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Hydrostatic leveling system for high-altitude operation car

A high-altitude operating vehicle and leveling technology, which is applied in the direction of fluid pressure actuators, servo motors, servo motor components, etc., can solve problems such as tearing of the hinge point of the oil cylinder, increased pressure of the leveling system, and danger to platform operators. smooth running effect

Pending Publication Date: 2018-10-12
XUZHOU HANDLER SPECIAL VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing static pressure leveling system requires that both the platform and the turntable can be leveled. In order to achieve leveling at both places, a group of manual valves are generally installed on the platform and the turntable to control the leveling system in parallel. After the working platform is skewed, the hydraulic components in the leveling system will start to adjust the platform through the hydraulic cylinder. During the adjustment process, due to the linkage control between the two leveling cylinders, when one cylinder is at the limit position, the other cylinder will still It will continue to operate, which will cause the pressure in the leveling system to increase, and the hydraulic oil cannot be drained, causing the pipe to explode, the oil cylinder to bend, the oil cylinder to disengage, or the hinge point of the oil cylinder to tear, which will cause danger to the platform operator; and the oil circuit layout needs Add two pipelines from the platform to the turntable, resulting in complex oil circuit redundancy

Method used

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  • Hydrostatic leveling system for high-altitude operation car
  • Hydrostatic leveling system for high-altitude operation car
  • Hydrostatic leveling system for high-altitude operation car

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a static pressure leveling system for an aerial work vehicle includes a working platform 4, a turntable 12, a primary arm 14 and a secondary arm 15. The left end of the primary arm 14 is hinged at the hinge point at the upper end of the turntable 12. The right end of the arm 14 is hinged with the right end of the secondary arm 15, the left end of the secondary arm 15 is hinged at the platform bracket 3 on the side of the working platform, and the middle part of the primary arm 14 is hingedly connected with the middle and lower part of the turntable 12. The luffing oil cylinder 13 is hingedly connected with the second-stage luffing oil cylinder 16 between the middle part of the secondary arm 15 and the lower right end of the first-stage arm 14. There is an active leveling oil cylinder 17 hingedly connected between the positions, and a driven leveling oil cylinder 5 is hingedly connected between the leftmost end of the secondary arm 15 and the m...

Embodiment 2

[0041] The difference between the second embodiment and the first embodiment is that the turntable hydraulic lock is replaced by the fifth balance valve 25 and the sixth balance valve 26, the platform hydraulic lock is replaced by the third balance valve 23 and the fourth balance valve 24, and the Two overflow valves connected in parallel to the hydraulic lock of the turntable.

[0042] Specifically, the first oil outlet A1 and the second oil outlet B1 of the turntable control leveling manual reversing valve 11 are respectively connected to the oil inlet V9 of the fifth balance valve 25 and the oil inlet V10 of the sixth balance valve 26, The first oil outlet A2 and the second oil outlet B2 of the platform control leveling manual reversing valve 1 are respectively connected with the oil inlet V7 of the third balance valve 23 and the oil inlet V8 of the fourth balance valve 24, and the fifth The oil outlet C9 of the balance valve 25 is respectively connected with the oil inlet V5...

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Abstract

The invention discloses a hydrostatic leveling system for a high-altitude operation car. A drive leveling cylinder and a driven leveling cylinder are connected through a balance valve, a two-way hydraulic lock or two parallel balance valves are arranged at two control platform leveling multi-way valves of a rotary table and a platform, pressure in the leveling system can be maintained while linkage of the two cylinders is ensured, overflow valves are arranged between the drive leveling cylinder and a main oil path, high-pressure oil in the leveling system overflows from the first overflow valve or the second overflow valve back to an oil tank when the pressure reaches the set pressure of the first overflow valve or the second overflow valve, risks of pipe bursting, cylinder bending, cylinder disengagement or cylinder hinge point tearing caused by continuous rising of the pressure in a hydraulic system are prevented, and thus potential safety hazards of pipe bursting, cylinder bending,cylinder disengagement or cylinder hinge point tearing possibly caused when an operation platform tilts and continues moving in the operation process of the high-altitude operation car are avoided while stable running of the system is ensured.

Description

technical field [0001] The invention relates to a leveling system of an engineering vehicle, in particular to a static pressure leveling system of an aerial work vehicle, and belongs to the technical field of engineering machinery hydraulic control. Background technique [0002] Telescopic arm or hybrid arm aerial work vehicles are widely used in street lights, gardens, decoration, petroleum, construction, electric power, shipbuilding, bridge construction and other fields. The control object of the leveling mechanism of the aerial work vehicle is the working platform connected to the top of the boom. The existing commonly used leveling systems are mainly divided into two types: electro-hydraulic control leveling and static pressure leveling. However, because the electro-hydraulic control leveling system controls Complex and high maintenance costs, so it is mainly used on high-altitude operating vehicles with large heights and complex working conditions. [0003] Insulated a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/08F15B13/04
CPCF15B11/08F15B13/0401
Inventor 朱赛耿艳杰陈时妹董洪月
Owner XUZHOU HANDLER SPECIAL VEHICLE
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