Suspension valves, suspension systems and engineering vehicles
A technology of suspension system and suspension cylinder, which is applied in vehicle springs, vehicle parts, fluid pressure actuation system components, etc., and can solve problems such as air leakage, air pressure reduction, and impact on braking performance of the air brake system
Active Publication Date: 2020-01-31
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
In this way, the power of the electromagnetic coil of the solenoid valve is small, and the risk of heat generation and burning is smaller. However, on the one hand, since the suspension valve is connected to the air brake system in multiple places, the possibility of air brake system leakage becomes smaller. On the other hand, if the engineering vehicle brakes continuously when going down a long slope, the air pressure reduction of the air brake system will cause the valve of the switching valve to not be fully opened, which will affect the performance of the oil-air suspension system. flexible function
Method used
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[0048] 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.
[0049] Such as image 3 As shown, the suspension valve provided by the present invention may include: a logic valve 30, a shuttle valve 40 and a two-position four-way valve 50, wherein the first oil inlet 41 of the shuttle valve 40 is connected to the first oil inlet 41 of the logic valve 30. The first oil port 311 of the side chamber 31 is connected, and the second oil inlet 42 of the shuttle valve 40 is connected to the second oil port 312 and the third oil port 313 of the first side chamber 31 of the logic valve 30 . The accumulator 60 of the suspension valve is connected, the oil outlet 43 of the shuttle valve 40 is connected with the oil inlet 53 of the tw...
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The invention relates to the field of engineering machinery and discloses a suspension valve, a suspension system and an engineering vehicle. The suspension valve comprises a logic valve, a shuttle valve and a two-position four-way valve. A first oil inlet of the shuttle valve is connected with a first oil port of a first side cavity of the logic valve. A second oil inlet of the shuttle valve is connected with an energy accumulator of the suspension valve through a second oil port and a third oil port of the first side cavity of the logic valve. An oil outlet of the shuttle valve is connectedwith an oil inlet of the two-position four-way valve. A first working oil port of the two-position four-way valve is connected with a first action cavity of the two-position four-way valve. A second working oil port of the two-position four-way valve is connected with a second action cavity of the two-position four-way valve and a second side cavity of the logic valve. The suspension valve provided only needs short-time control action (for example, electricity-gaining or air source action), and rigid and flexible switching of the suspension system can be achieved, and in addition, rigid and flexible states of the suspension system are automatically maintained.
Description
technical field [0001] The invention relates to the field of engineering machinery, in particular to a suspension valve, a suspension system and an engineering vehicle. Background technique [0002] At present, more and more heavy-duty engineering vehicles adopt the oil-air suspension system. The oil-air suspension system consists of a flexible hydraulic component accumulator, a suspension cylinder and a suspension valve to control the attitude of the oil-air suspension. The oil-air suspension system has superior nonlinear elastic characteristics and Good vibration damping performance can meet the ride comfort requirements of engineering vehicles to the greatest extent. [0003] The oil-pneumatic suspension system has two modes: rigid and flexible: when the engineering vehicle is running normally, the oil-pneumatic suspension system should be in the flexible mode. When the vehicle (such as a crane) is on the vehicle or driving with a load, the oil-pneumatic suspension syste...
Claims
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IPC IPC(8): F15B21/08F15B13/02B60G17/015B60G17/08
CPCB60G17/015B60G17/08B60G2202/24B60G2202/42B60G2300/09F15B13/02F15B21/08
Inventor郭堃
OwnerZOOMLION HEAVY IND CO LTD