Working Bucket Hydraulic Control System and Engineering Vehicle
A hydraulic control system and working bucket technology, which is applied in the direction of fluid pressure actuators, servo motors, servo motor components, etc., can solve the problems that the working bucket 1 is difficult to maintain the level in real time, affects work efficiency, wastes power unit energy, etc.
Active Publication Date: 2016-05-04
CHANGSHA ZOOMLION FIRE FIGHTING VEHICLE +1
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Problems solved by technology
At this time, in the process of lowering the boom 2 by gravity, it is difficult for the working bucket 1 to keep level in real time.
If there are people or objects loaded in the working bucket, it is necessary to start the emergency pump power unit very frequently to level the working bucket 1 while realizing the automatic lowering of the boom gravity, which not only seriously affects the working efficiency, but also wastes the energy of the power unit
Method used
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[0038] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0039] In the present invention, in the case of no contrary description, the used orientation words such as "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings; "inside and outside" Refers to the inside and outside of the outline of each part itself. The technical term "boom self-weight recovery" used in the present invention refers to that after the main hydraulic pump of the system stops working, the boom stops working, and the boom is recovered toward the turntable luffing by using its own gravity, and then the luffing is compressed. The hydraulic oil in the rodless cavity of the oil cylinder is evenly ...
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The invention discloses a working hopper hydraulic control system and an engineering vehicle. The control system comprises a leveling oil cylinder (4), a leveling control circuit, a variable-amplitude oil cylinder (5), a variable-amplitude control circuit, a pressurizing oil cylinder (7) and a pressurizing oil way (V1). A rod cavity oil way of the pressurizing oil cylinder is connected with a main oil inflow way (P). A first opening and closing control valve (11), a first by-pass oil way (V2) and a second by-pass oil way (V3) are arranged in the pressurizing oil way, wherein the first by-pass oil way (V2) is connected to a rod cavity of the variable-amplitude oil cylinder in a hydraulic mode, and the second by-pass oil way (V3) is connected to a system oil tank (15) in a hydraulic mode and provided with a second opening and closing control valve (8). Because the pressurizing oil way is additionally arranged, in the arm support self-gravity retraction process, hydraulic oil in a non-rod cavity of the variable-amplitude hydraulic cylinder can supply oil to the leveling oil cylinder through the pressurizing oil way, the pressurizing oil cylinder, the main oil inflow way and the leveling control circuit to achieve real-time leveling of a working hopper. In the process, an emergency pump power unit does not need to be frequently started for leveling the working hopper, and therefore energy resources are saved.
Description
technical field [0001] The present invention relates to a hydraulic control system in an engineering vehicle, in particular, to a hydraulic control system for a working bucket. Background technique [0002] Working buckets are installed in various engineering vehicles such as aerial ladder fire trucks, climbing fire trucks, and aerial work vehicles to be used as loading platforms or standing platforms for operators. Such as figure 1 As shown, the turntable 3 of the engineering vehicle is hinged with a jib 2, and the jib 2 performs a pivotal luffing movement relative to the turntable 3 under the push of the luffing cylinder 5, and drives the working bucket 1 hinged at the top of the jib 2 to lift. or drop. During the lifting or lowering process of the working bucket 1, the working bucket 1 is leveled by the leveling cylinder 4, so that it is always kept in a horizontal position, so as to avoid adverse effects on the people or objects loaded in the working bucket. [0003] ...
Claims
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IPC IPC(8): F15B11/16F15B13/06
Inventor 刘召华熊炳榕
Owner CHANGSHA ZOOMLION FIRE FIGHTING VEHICLE