Oil and gas suspension system and engineering vehicles

A technology of oil and gas suspension and left suspension, which is applied to vehicle components, fluid pressure actuation system components, suspensions, etc., can solve the problem that the relative position of the cylinder and the piston rod cannot be monitored in real time, and achieves continuous vehicle height adjustment, The effect of fast and sufficient oil replenishment and precise control of the body posture

Active Publication Date: 2016-12-28
SANY AUTOMOBILE HOISTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose an oil-pneumatic suspension system and an engineering vehicle to solve the problem that the relative position of the cylinder barrel and the piston rod of the suspension cylinder cannot be monitored in real time

Method used

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  • Oil and gas suspension system and engineering vehicles
  • Oil and gas suspension system and engineering vehicles
  • Oil and gas suspension system and engineering vehicles

Examples

Experimental program
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Effect test

Embodiment 1

[0032] figure 1 and figure 2 That is the relevant drawings of this embodiment, as shown in the figure, the oil-pneumatic suspension system described in this embodiment includes a controller 3, a lifting control valve 4, a suspension cylinder, an accumulator, two position sensors 5, two Directional control valve 8, left damping device, right damping device, left one-way valve 71 and right one-way valve 72. Wherein, the suspension oil cylinder includes two left suspension oil cylinders 11 and 12 right suspension cylinders, and the accumulator includes two left accumulators 21 and 22 right accumulators, and the directional control valve 8 is a normally closed valve controlled by the controller 3. Two-position two-way solenoid valve. The left damping device and the right damping device are two electric proportional valves 6 controlled by the controller 3 . The lifting control valve 4 is an electromagnetic reversing valve controlled by the controller 3. The lifting control valv...

Embodiment 2

[0039] image 3 That is the relevant drawings of this embodiment, as shown in the figure, except for the damping device, the rest of the structure of this embodiment is completely consistent with that of Embodiment 1. The left damping device and the right damping device in this embodiment are both multi-stage damping switching valves, and the multi-stage damping switching valve includes two mutually parallel damping holes 9 and a directional control valve 8, and this directional control valve 8 is connected to one of them. The damping holes 9 are connected in series. The directional control valve 8 is also a two-position two-way solenoid valve controlled by the controller 3 , and the damping can be adjusted stepwise by controlling the on-off of the directional control valve 8 .

[0040] As other modified implementations of this embodiment, the damping device can be more than two damping holes 9 connected in parallel with each other, and there can also be multiple directional ...

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Abstract

The invention provides a hydro-pneumatic suspension system and an engineering vehicle. The hydro-pneumatic suspension system comprises a suspension cylinder, an energy accumulator, a controller and a position sensor arranged in the suspension cylinder. The position sensor is used for detecting the relative position of a cylinder barrel and a piston rod of the suspension cylinder in real time and sending a detection signal to the controller. The built-in position sensor is arranged in the suspension cylinder, the relative position of the cylinder barrel and the piston rod can be monitored in real time through the controller, a lifting control valve performs oil discharge or oil inlet on a rodless cavity of the suspension cylinder so as to continuously adjust extending length of the suspension cylinder, therefore vehicle height can be adjusted continuously, vehicle body posture can be controlled accurately, and passing capacity of the vehicle at terrible road condition is improved greatly.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an oil-air suspension system and an engineering vehicle. Background technique [0002] Oil-air suspension is a suspension device that uses oil to transmit pressure, uses inert gas (usually nitrogen) as the elastic medium, and uses throttle holes, check valves, etc. as shock absorber components. Ride comfort and vehicle driving stability have been widely used in many wheeled engineering vehicles, such as all-terrain cranes, mining dump trucks, and missile transport vehicles. At present, most of the oil-pneumatic suspensions used in engineering vehicles belong to the category of passive suspension. During the driving process of the vehicle, its stiffness and damping characteristics cannot be actively adjusted, and cannot fully meet the needs of complex roads and driving conditions (such as driving on a highway. In order to improve the stability of the car body, it is necessary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60G17/015B60G17/019F15B1/02F15B21/08F15B13/06
Inventor 邹兴龙吴永闯余明
Owner SANY AUTOMOBILE HOISTING MACHINERY
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