Energy feedback type hydraulic active suspension system

Abstract

The utility model discloses an energy feedback type hydraulic active suspension system. The energy storage piston is arranged in the damping shell and divides the damping shell into an upper energy storage cavity and a lower energy storage cavity; the piston rod can move up and down in the damping shell; the bag skin is arranged at the upper end part of the damping shell; the upper fixed seat is fixed at the upper end part of the bag skin; the lower fixing seat is fixed at the lower end part of the damping supercharger, and an additional energy storage cavity is formed between the lower fixing seat and the outer side wall of the damping supercharger; the additional piston is arranged in the additional energy storage cavity and divides the additional energy storage cavity into an upper additional energy storage cavity and a lower additional energy storage cavity; and the upper end part of the piston rod is fixedly connected with the upper fixed seat and the lower end part is fixedly connected with the additional piston. Noise generated in the air compression process can be effectively reduced, an acoustic bag is not needed, cost is effectively saved, and energy is effectively recycled. And by matching with the adjustment of each electromagnetic valve, the suspension adjustment requirement can be quickly responded.

Description

Technical Field

[0001] This utility model belongs to the field of air spring accessories, and specifically relates to an energy-recharged hydraulic active suspension system. Background Technology

[0002] With the increasing demand for driving comfort, active control suspension systems using air springs have become more and more common in the market in recent years. Air springs generally use an air compressor as a power unit, which draws air from the atmosphere or a low-pressure air tank and compresses the gas into a high-pressure air tank. The high-pressure gas in the high-pressure air tank is flow-controlled by an air supply unit to lift the air spring. An acoustic package is used to reduce the noise generated during the operation of the air compressor.

[0003] Current active suspension systems, when using air springs, require a complete pneumatic control system, including an air compressor, filter, air supply unit, air tank, and controller. This system has many components, a complex structure, high operating noise, requires an acoustic package, and is relatively expensive.

[0004] In order to eliminate the many problems caused by air compressors, some air suspension systems currently use the up-and-down vibration process of the car to passively adjust the air suspension, but this method has a slow adjustment response at startup. Summary of the Invention

[0005] The purpose of this invention is to provide a fast-responding energy-recharged hydraulic active suspension system.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an energy-rechargeable hydraulic active suspension system, comprising:

[0007] A shock-absorbing supercharger includes a shock-absorbing housing that forms a first cavity inside, an energy storage piston disposed in the first cavity and dividing the first cavity into an upper energy storage cavity and a lower energy storage cavity, and a piston rod that passes through the shock-absorbing housing and moves up and down within the shock-absorbing housing, wherein the energy storage piston is fixed on the piston rod.

[0008] The air spring body includes a bladder skin disposed on the upper end of the vibration damping housing and an upper fixing seat fixed on the upper end of the bladder skin, with the bladder skin and the vibration damping booster forming a main cavity;

[0009] A high-pressure gas storage tank is connected to the main cavity via a first solenoid valve;

[0010] A low-pressure gas storage tank is connected to the main chamber via a second solenoid valve;

[0011] The shock absorber and booster also includes a lower fixed seat fixed to the lower end of the shock absorber and booster and forming an additional energy storage chamber between the lower fixed seat and the outer side wall of the shock absorber and booster; an additional piston disposed in the additional energy storage chamber and dividing the additional energy storage chamber into an upper additional energy storage chamber and a lower additional energy storage chamber; and a third solenoid valve connected between the low-pressure gas tank and the lower additional energy storage chamber. The high-pressure gas tank and the lower additional energy storage chamber are connected. The upper end of the piston rod is fixedly connected to the upper fixed seat and its lower end is fixedly connected to the additional piston.

[0012] In another embodiment, the lower auxiliary energy storage chamber is provided with an energy storage spring connected between the lower end face of the auxiliary piston and the lower fixed seat. Adding an energy storage spring can improve the buffering effect and energy feeding speed of the suspension system.

[0013] In another embodiment, the energy storage piston is provided with several valves, and the compression of the energy storage piston during its downward movement and the upward reset of the energy storage piston are controlled in a timely manner by controlling the opening and closing of the valves.

[0014] In another embodiment, the energy storage piston is provided with a first mechanical valve and a second mechanical valve with opposite communication directions. Both the first mechanical valve and the second mechanical valve are one-way valves. When the energy storage piston moves downward to compress the lower additional energy storage chamber, the first mechanical valve opens and the second mechanical valve closes, allowing the medium in the lower energy storage chamber to enter the upper energy storage chamber. When the energy storage piston moves upward to reset, the first mechanical valve closes and the second mechanical valve opens, allowing the medium in the upper energy storage chamber to enter the lower energy storage chamber.

[0015] In another embodiment, a third mechanical valve is provided between the high-pressure gas storage tank and the lower auxiliary energy storage chamber. The third mechanical valve is a one-way valve that allows one-way flow from the lower auxiliary energy storage chamber to the high-pressure gas storage tank.

[0016] In another embodiment, a fourth mechanical valve is provided between the low-pressure gas storage tank and the lower auxiliary energy storage chamber. The fourth mechanical valve is a one-way valve that allows the low-pressure gas storage tank to unidirectionally flow into the lower auxiliary energy storage chamber.

[0017] In another embodiment, the first solenoid valve is a two-position two-way solenoid valve.

[0018] In another embodiment, the second solenoid valve is a two-position two-way solenoid valve.

[0019] In another embodiment, the third solenoid valve is a two-position two-way solenoid valve.

[0020] In another embodiment, the suspension system further includes pressure sensors disposed within the high-pressure gas tank and the low-pressure gas tank.

[0021] The beneficial effects of this invention are as follows: This invention combines a shock absorber and a supercharger with the air spring body, integrating the comfort of air springs with the energy recovery of hydraulic shock absorbers and superchargers; simultaneously, addressing the pain point of existing pneumatic devices having high power but low efficiency, it converts vibration energy into air pressure energy and collects this energy in high-pressure and low-pressure air tanks, thus supplementing the air pressure of the air spring system without the need for an air compressor; this solution can effectively reduce noise during air compression, eliminates the need for an acoustic package, and effectively saves costs and recovers energy; in conjunction with the adjustment of various solenoid valves, it can quickly respond to suspension adjustment needs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0024] like Figure 1 As shown, the energy-recharged hydraulic active suspension system includes: a shock absorber and booster, an air spring body 6, a high-pressure air tank 1, a low-pressure air tank 2, and pressure sensors installed in the high-pressure air tank 1 and the low-pressure air tank 2.

[0025] The air spring body 6 includes a bladder 19 disposed on the upper end of the damping housing and an upper fixing seat 18 fixed on the upper end of the bladder 19. The bladder 19 and the damping booster form a main cavity 20.

[0026] The high-pressure gas storage tank 1 is connected to the main chamber 20 via the first solenoid valve 3; the low-pressure gas storage tank 2 is connected to the main chamber 20 via the second solenoid valve 4.

[0027] The shock absorber and booster includes a shock absorber housing 7 forming a first cavity inside, an energy storage piston 10 disposed in the first cavity and dividing the first cavity into an upper energy storage chamber 14 and a lower energy storage chamber 15, a piston rod 21 penetrating the shock absorber housing 7 and capable of moving up and down within the shock absorber housing 7 along the axial direction of the shock absorber housing 7, a lower fixing seat 22 fixed to the lower end of the shock absorber and forming an additional energy storage chamber between the lower end of the shock absorber and the outer side wall of the shock absorber and booster, an additional piston 17 disposed in the additional energy storage chamber and dividing the additional energy storage chamber into an upper additional energy storage chamber 21 and a lower additional energy storage chamber 16, and a third solenoid valve 5 connected between the low-pressure gas tank 2 and the lower additional energy storage chamber 16. The energy storage piston 10 is fixed to the piston rod 21, the high-pressure gas tank 1 and the lower additional energy storage chamber 16 are connected, the upper end of the piston rod 21 is fixedly connected to the upper fixing seat 18 and its lower end is fixedly connected to the additional piston 17.

[0028] The lower auxiliary energy storage chamber 16 is equipped with an energy storage spring 11 connected between the lower end face of the auxiliary piston 17 and the lower fixed seat 22. The addition of the energy storage spring 11 can improve the buffering effect and energy dissipation speed of the suspension system. The energy storage piston 10 is equipped with several valves. By controlling the opening and closing of the valves, the compression of the energy storage piston 10 during its downward movement and the upward reset of the energy storage piston 10 can be controlled in a timely manner.

[0029] The valves include a first mechanical valve 8 and a second mechanical valve 9 disposed on the energy storage piston 10 and connected in opposite directions. Both the first mechanical valve 8 and the second mechanical valve 9 are combination valves of one-way valve and throttle valve. When the energy storage piston 10 moves downward to compress the lower auxiliary energy storage chamber 16, the first mechanical valve 8 opens and the second mechanical valve 9 closes, and the medium in the lower energy storage chamber enters the upper energy storage chamber. When the energy storage piston 10 moves upward to reset, the first mechanical valve 8 closes and the second mechanical valve 9 opens, and the medium in the upper energy storage chamber enters the lower energy storage chamber.

[0030] A third mechanical valve 13 is installed between the high-pressure gas storage tank 1 and the lower auxiliary energy storage chamber 16. The third mechanical valve 13 is a one-way valve that allows unidirectional flow from the lower auxiliary energy storage chamber 16 to the high-pressure gas storage tank 1. A fourth mechanical valve 12 is installed between the low-pressure gas storage tank 2 and the lower auxiliary energy storage chamber 16. The fourth mechanical valve 12 is a one-way valve that allows unidirectional flow from the low-pressure gas storage tank 2 to the lower auxiliary energy storage chamber 16. The first solenoid valve 3, the second solenoid valve 4, and the third solenoid valve 5 are all two-position two-way solenoid valves; the first mechanical valve 8 and the second mechanical valve 9 are combination valves of one-way valve and throttle valve; the third mechanical valve 13 and the fourth mechanical valve 12 are one-way valves.

[0031] The working principle of this utility model is as follows:

[0032] When insufficient gas pressure is detected in the high-pressure gas tank 1 while the vehicle is in motion, the third solenoid valve 5 is opened. When the wheel bounces, it compresses the shock absorber supercharger. The upper fixed seat 18, piston rod 21, and accumulator piston 10 move downwards synchronously. The first mechanical valve 8 opens, the second mechanical valve 9 closes, and the auxiliary piston 17 moves downwards. Hydraulic oil in the lower accumulator chamber 15 enters the upper accumulator chamber 14 through the first mechanical valve 8. The accumulator spring 11 is compressed, reducing the volume of the lower auxiliary accumulator chamber 16 and compressing the gas within it. When the gas pressure in the lower auxiliary accumulator chamber 16 exceeds the pressure in the high-pressure gas tank 1, the third mechanical valve 13 opens. The gas in the lower auxiliary energy storage chamber 16 replenishes the gas pressure in the high-pressure gas storage tank 1. When the wheel moves downward, the shock absorber and supercharger are stretched. The upper fixed seat 18, piston rod 21 and energy storage piston 10 move upward synchronously. The first mechanical valve 8 closes and the second mechanical valve 9 opens. The auxiliary piston 17 moves upward, and the hydraulic oil in the upper energy storage chamber 14 enters the lower energy storage chamber 15 through the second mechanical valve 9. The energy storage spring 11 is stretched, and the volume of the lower auxiliary energy storage chamber 16 increases. When the gas pressure in the lower auxiliary energy storage chamber 16 is less than the pressure in the low-pressure gas storage tank 2, the fourth mechanical valve 12 opens, and the gas in the low-pressure gas storage tank 2 replenishes the lower auxiliary energy storage chamber 16.

[0033] The high-pressure gas tank 1 can inflate the main chamber 20. During inflation, the first solenoid valve 3 is opened, and the second solenoid valve 4 and the third solenoid valve 5 are closed. The gas in the high-pressure gas tank 1 flows through the first solenoid valve 3 into the air bladder of the main chamber 20.

[0034] The gas in the main chamber 20 can be released into the low-pressure gas storage tank 2. When releasing the gas, the second solenoid valve 4 opens, and the first solenoid valve 3 and the third solenoid valve 5 close.

[0035] When the gas pressure in the high-pressure gas tank 1 is detected to be sufficient for use, the third solenoid valve 5 remains closed. When the vehicle height needs to be raised, the first solenoid valve 3 is opened to inflate the main chamber 20; when the vehicle height needs to be lowered, the second solenoid valve 4 is opened to fill the low-pressure gas tank 2 with the high-pressure gas in the main chamber 20.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A feed-energy hydraulic active suspension system, comprising: a shock booster comprising a shock housing forming a first cavity inside, an accumulator piston arranged in the first cavity and dividing the first cavity into an upper accumulator cavity and a lower accumulator cavity, a piston rod penetrating through the shock housing and moving up and down inside the shock housing, the accumulator piston being fixed on the piston rod; an air spring body comprising a bladder arranged on an upper end of the shock housing, an upper fixed seat fixed on an upper end of the bladder, a main cavity being formed between the bladder and the shock booster; a high-pressure gas tank connected with the main cavity through a first electromagnetic valve; a low-pressure gas tank connected with the main cavity through a second electromagnetic valve; characterized in that the shock booster further comprises a lower fixed seat fixed on a lower end of the shock booster and forming an additional accumulator cavity with an outer wall of the shock booster, an additional piston arranged in the additional accumulator cavity and dividing the additional accumulator cavity into an upper additional accumulator cavity and a lower additional accumulator cavity, a third electromagnetic valve connected between the low-pressure gas tank and the lower additional accumulator cavity, the high-pressure gas tank being connected with the lower additional accumulator cavity, an upper end of the piston rod being fixedly connected with the upper fixed seat and a lower end of the piston rod being fixedly connected with the additional piston.

2. The regenerative hydraulic active suspension system of claim 1, wherein: an accumulator spring is arranged in the lower additional accumulator cavity and connected between a lower end surface of the additional piston and the lower fixed seat.

3. The regenerative hydraulic active suspension system of claim 1, wherein: a plurality of valves are arranged on the accumulator piston.

4. The regenerative hydraulic active suspension system of claim 3, wherein: the accumulator piston is provided with a first mechanical valve and a second mechanical valve with opposite communication directions.

5. The regenerative hydraulic active suspension system of claim 1, wherein: a third mechanical valve is arranged between the high-pressure gas tank and the lower additional accumulator cavity.

6. The regenerative hydraulic active suspension system of claim 1, wherein: a fourth mechanical valve is arranged between the low-pressure gas tank and the lower additional accumulator cavity.

7. The regenerative hydraulic active suspension system of claim 1, wherein: the first electromagnetic valve is a two-position two-way electromagnetic valve.

8. The energy feeding hydraulic active suspension system of claim 1, wherein: the second electromagnetic valve is a two-position two-way electromagnetic valve.

9. The regenerative hydraulic active suspension system of claim 1, wherein: the third electromagnetic valve is a two-position two-way electromagnetic valve.

10. The energy feeding hydraulic active suspension system of claim 1, wherein: the suspension system further comprises pressure sensors arranged in the high-pressure gas tank and the low-pressure gas tank.

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