An electrically controlled air spring device with reverse exhaust function

Abstract

The utility model discloses an electric control air spring device with reverse exhaust function, including air spring, gas source system, inlet electromagnetic valve, sensor, controller, gas circuit switching element, the gas source system is connected with gas circuit switching element, inlet electromagnetic valve, air spring in proper order, the gas circuit switching element is configured as first working condition and second working condition, the controller is electrically connected with gas circuit switching element, inlet electromagnetic valve, sensor, the sensor is used for detecting the state of air spring, the controller is configured as when needing to carry out reverse exhaust, first control gas circuit switching element switches from first working condition to second working condition, then control inlet electromagnetic valve opens, to make the gas in air spring through inlet electromagnetic valve and gas circuit switching element exhausts to atmospheric environment. The utility model can safely, reliably realize the exhaust of air spring under the big load working condition.

Description

Technical Field

[0001] This utility model relates to the field of air spring control technology, and in particular to an electronically controlled air spring device with reverse exhaust function. Background Technology

[0002] Air springs are widely used in precision instrument vibration isolation tables, high-end equipment manufacturing, and vehicle suspension systems due to their excellent vibration isolation and leveling properties. However, existing technology has a common and dangerous problem: when an air spring is under a large load, the internal pressure is very high, requiring a reduction in height or pressure for conventional venting (i.e., opening the vent valve to directly vent to the atmosphere). However, if the vent valve or venting channel is damaged or blocked at this time, venting may become difficult or even impossible. If the operator forcibly opens the vent valve or removes the load directly, the huge pressure difference between the external atmospheric pressure and the high internal pressure of the air spring will be released instantly, causing the air spring to expand rapidly and the internal pressure to drop sharply. This could lead to serious safety accidents such as equipment impact damage, platform imbalance and tipping, or even personal injury. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electronically controlled air spring device with reverse exhaust function, which can safely and reliably realize the exhaust of the air spring under heavy load conditions, and avoid the danger of internal expansion caused by sudden pressure loss.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electronically controlled air spring device with reverse exhaust function includes an air spring, an air source system, an intake solenoid valve, a sensor, a controller, and an air path switching unit. The air source system is sequentially connected to the air path switching unit, the intake solenoid valve, and the air spring. The air path switching unit is configured to have a first working state and a second working state. The first working state of the air path switching unit is to connect the air source system to the input end of the intake solenoid valve. The second working state of the air path switching unit is to connect the input end of the intake solenoid valve to the atmospheric environment and disconnect the input end of the intake solenoid valve from the air source system. The controller is electrically connected to the air path switching unit, the intake solenoid valve, and the sensor. The sensor is used to detect the state of the air spring. The controller is configured to, when reverse exhaust is required, first control the air path switching unit to switch from the first working state to the second working state, and then control the intake solenoid valve to open, so that the gas in the air spring is discharged to the atmospheric environment through the intake solenoid valve and the air path switching unit.

[0005] As a preferred embodiment, the gas path switching unit is a two-position three-way solenoid valve. The first port of the two-position three-way solenoid valve is connected to the gas source system, the second port of the two-position three-way solenoid valve is connected to the input end of the intake solenoid valve, and the third port of the two-position three-way solenoid valve is connected to the atmospheric environment.

[0006] As a preferred embodiment, the air spring includes a spring housing, an upper housing, a flange, and a diaphragm. The spring housing is provided with an air inlet and an air outlet. A balancing metal block is provided in the middle of the upper housing. The sensor is disposed inside the balancing metal block. The upper housing is disposed on the spring housing through the flange. The diaphragm is connected to the upper housing and the flange to form a sealed air chamber.

[0007] As a preferred embodiment, a soft pad is provided between the upper housing and the spring housing.

[0008] As a preferred embodiment, the sensor is a height sensor, which is integrated inside the balance metal block of the air spring.

[0009] As a preferred embodiment, the intake solenoid valve is disposed in the inner cavity of the air spring, and the inner cavity of the air spring is also disposed of by an exhaust solenoid valve, the intake solenoid valve being connected to the air inlet, and the exhaust solenoid valve being connected to the air outlet.

[0010] As a preferred embodiment, the gas source system includes a gas pump, a gas storage tank, and a pressure reducing valve connected in sequence, with the pressure reducing valve connected to a gas path switching unit.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) It eliminates the safety hazards such as airbag inflation and pressure shock caused by the difficulty of conventional exhaust under heavy load, and realizes the stable and controllable release of high pressure difference; (2) Exhausting is achieved by using the air intake channel of the air spring, which simplifies the structure, improves reliability, and reduces costs. Attached Figure Description

[0012] Figure 1 This is a system block diagram of this utility model; Figure 2 This is a schematic diagram of the air spring structure in this utility model; Figure 3 This is a schematic diagram of the upper shell and the balancing metal block in this utility model; Figure 4 This is an installation diagram of the inlet solenoid valve and the outlet solenoid valve in this utility model. The attached diagram lists the following components: 1. Air spring; 2. Air source system; 3. Inlet solenoid valve; 4. Sensor; 5. Controller; 6. Air path switching unit; 7. Spring housing; 8. Upper housing; 9. Flange; 10. Diaphragm; 11. Inlet; 12. Outlet; 13. Balance metal block; 14. Soft pad; 15. Outlet solenoid valve; 16. Air pump; 17. Air tank; 18. Pressure reducing valve. Detailed Implementation

[0013] The present invention will be further described below with reference to specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the protection scope of the present invention. Example

[0014] like Figure 1 As shown, an electronically controlled air spring device with reverse exhaust function includes an air spring 1, an air source system 2, an intake solenoid valve 3, a sensor 4, a controller 5, and an air path switching unit 6. The air source system 2 is sequentially connected to the air path switching unit 6, the intake solenoid valve 3, and the air spring 1. The air path switching unit 6 is configured to have a first operating state and a second operating state. The first operating state of the air path switching unit 6 is to connect the air source system 2 to the input terminal of the intake solenoid valve 3. The second operating state of the air path switching unit 6 is to connect the intake solenoid valve 3 to the input terminal of the air source system 2. The input terminal of the air spring 1 is connected to the atmospheric environment and disconnects the input terminal of the air intake solenoid valve 3 from the air source system 2. The controller 5 is electrically connected to the air path switching unit 6, the air intake solenoid valve 3, and the sensor 4. The sensor 4 is used to detect the state of the air spring 1. The controller 5 is configured to, when reverse exhaust is required, first control the air path switching unit 6 to switch from the first working state to the second working state, and then control the air intake solenoid valve 3 to open, so that the gas in the air spring 1 is discharged to the atmospheric environment through the air intake solenoid valve 3 and the air path switching unit 6.

[0015] Specifically, when sensor 4 detects that air spring 1 needs to be vented and determines that there is a risk of high load, it first controls the input end of the intake solenoid valve 3 to be connected to the atmosphere and isolates the air source system 2, that is, the air path switching unit 6 is switched from the first working state to the second working state. Then, the intake solenoid valve 3 is opened, so that the high pressure gas inside the air spring 1 is discharged in reverse to the atmospheric environment through the intake solenoid valve 3.

[0016] More specifically, the increase in the internal volume of the air spring 1 is controlled by the controller 5 by filling the air spring 1 with gas, which comes from the gas remaining in the air path before the air path switching unit 6 switches states.

[0017] Preferably, the gas path switching unit 6 is a two-position three-way solenoid valve. The first port of the two-position three-way solenoid valve is connected to the gas source system 2, the second port of the two-position three-way solenoid valve is connected to the input end of the intake solenoid valve 3, and the third port of the two-position three-way solenoid valve is connected to the atmospheric environment.

[0018] Specifically, the first working state of the gas path switching unit 6 corresponds to the connection between the first port and the second port of the two-position three-way solenoid valve, and the second working state of the gas path switching unit 6 corresponds to the connection between the second port and the third port of the two-position three-way solenoid valve.

[0019] Preferred, such as Figures 2-3 As shown, the air spring 1 includes a spring housing 7, an upper housing 8, a flange 9, and a diaphragm 10. The spring housing 7 is provided with an air inlet 11 and an air outlet 12. A balance metal block 13 is provided in the middle of the upper housing 8. The sensor 4 is disposed in the balance metal block 13. The upper housing 8 is disposed on the spring housing 7 through the flange 9. The diaphragm 10 is connected between the upper housing 8 and the flange 9 to form a sealed air chamber.

[0020] Specifically, the upper housing 8 and the flange 9 are flexibly connected by the diaphragm 10 to form an expandable and contractible flexible sealed air chamber. The compressibility of the gas is used to support the load. The flange 9 directly contacts and supports the load, and transfers the load to the balancing metal block 13 of the upper housing 8.

[0021] More specifically, when compressed gas is filled into the spring housing 7, there is a through hole at the bottom of the upper housing 8 to send the gas into the diaphragm 10. The flange 9 is used to fasten the diaphragm 10 and support the load. After inflation, the diaphragm 10 bulges up, which will lift the balance metal block 13, and the balance metal block 13 will lift the load.

[0022] More preferably, a soft pad 14 is provided between the upper housing 8 and the spring housing 7.

[0023] Specifically, the soft pad 14 is used to increase the reliability of the seal.

[0024] Preferably, the sensor 4 is a height sensor, and the sensor 4 is integrated inside the balance metal block 13 of the air spring 1.

[0025] Specifically, the sensor 4 is built into the balance metal block 13 and can directly and accurately measure the displacement of the flange 9 relative to the balance metal block 13. Since the flange 9 is connected to the upper housing 8 through the diaphragm 10, this displacement directly reflects the real-time height change of the load support point, which is a feedback signal used to detect the state of the air spring 1.

[0026] Preferred, such as Figure 4As shown, the intake solenoid valve 3 is disposed in the inner cavity of the air spring 1, and the inner cavity of the air spring 1 is also provided with an exhaust solenoid valve 15. The intake solenoid valve 3 is connected to the air inlet 11, and the exhaust solenoid valve 15 is connected to the air outlet 12.

[0027] Specifically, when inflation is required, the controller 5 controls the air intake solenoid valve 3 to open and the air exhaust solenoid valve 15 to close, thereby inflating the air spring 1. When normal deflating is required, the controller 5 controls the air exhaust solenoid valve 15 to open and the air intake solenoid valve 3 to close, thereby deflating the air spring 1.

[0028] Preferably, the gas source system 2 includes an air pump 16, an air storage tank 17, and a pressure reducing valve 18 connected in sequence, and the pressure reducing valve 18 is connected to the gas path switching unit 6.

[0029] Specifically, the pressure reducing valve 18 is configured to reduce and stabilize the high-pressure gas from the air pump 16 at a preset, safe system operating pressure value, providing stable gas source conditions for automatic leveling control and protecting downstream pipelines and components.

[0030] In specific implementation, if the exhaust solenoid valve 15 is damaged or blocked in the exhaust channel, the specific steps are as follows: close the intake solenoid valve 3 and cut off the air supply system 2; the controller 5 immediately controls the air path switching unit 6 to switch from the first working state to the second working state; open the intake solenoid valve 3, and since the internal pressure of the air spring 1 is greater than the pressure of the external atmospheric environment, the gas will automatically and relatively smoothly be discharged to the external atmospheric environment until the target altitude or internal pressure is reached.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electronically controlled air spring device with reverse exhaust function, characterized in that: The system includes an air spring, an air supply system, an intake solenoid valve, a sensor, a controller, and an air path switching unit. The air supply system is sequentially connected to the air path switching unit, the intake solenoid valve, and the air spring. The air path switching unit is configured to have a first operating state and a second operating state. In the first operating state, the air path switching unit connects the air supply system to the input terminal of the intake solenoid valve. In the second operating state, the air path switching unit connects the input terminal of the intake solenoid valve to the atmospheric environment and disconnects the input terminal of the intake solenoid valve from the air supply system. The controller is electrically connected to the air path switching unit, the intake solenoid valve, and the sensor. The sensor is used to detect the state of the air spring. The controller is configured to, when reverse exhaust is required, first control the air path switching unit to switch from the first operating state to the second operating state, and then control the intake solenoid valve to open, so that the gas in the air spring is discharged into the atmospheric environment through the intake solenoid valve and the air path switching unit.

2. The electronically controlled air spring device with reverse exhaust function according to claim 1, characterized in that: The gas path switching unit is a two-position three-way solenoid valve. The first port of the two-position three-way solenoid valve is connected to the gas source system, the second port of the two-position three-way solenoid valve is connected to the input end of the intake solenoid valve, and the third port of the two-position three-way solenoid valve is connected to the atmospheric environment.

3. The electronically controlled air spring device with reverse exhaust function according to claim 1, characterized in that: The air spring includes a spring housing, an upper housing, a flange, and a diaphragm. The spring housing has an air inlet and an air outlet. A balancing metal block is located in the middle of the upper housing. The sensor is located inside the balancing metal block. The upper housing is mounted on the spring housing via the flange. The diaphragm is connected to the upper housing and the flange to form a sealed air chamber.

4. The electronically controlled air spring device with reverse exhaust function according to claim 3, characterized in that: A soft pad is provided between the upper housing and the spring housing.

5. An electronically controlled air spring device with reverse exhaust function according to claim 3, characterized in that: The sensor is a height sensor, which is integrated inside the balance metal block of the air spring.

6. The electronically controlled air spring device with reverse exhaust function according to claim 3, characterized in that: The intake solenoid valve is disposed in the inner cavity of the air spring, and the inner cavity of the air spring is also disposed of by an exhaust solenoid valve. The intake solenoid valve is connected to the air inlet, and the exhaust solenoid valve is connected to the air outlet.

7. The electronically controlled air spring device with reverse exhaust function according to claim 1, characterized in that: The gas source system includes a gas pump, a gas storage tank, and a pressure reducing valve connected in sequence, and the pressure reducing valve is connected to the gas path switching unit.

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