Integrated air supply unit for air suspension

Abstract

The application discloses an integrated air supply unit of an air suspension, which comprises a damping support and a motor, the motor and a compression pump body are installed on the damping support; a distribution valve assembly is installed on one side of the motor; the inside of the compression pump body is provided with a running inner cavity, a first chamber and a second chamber, the two ends of the running inner cavity are respectively provided with a first compression cavity and a second compression cavity, the inside is provided with a first piston and a second piston, the first piston and the second piston are driven to move in the same direction and in the axial direction by the main shaft of the motor; the first compression cavity and the second compression cavity are in communication with the first chamber, the second chamber is in communication with the second compression cavity, and an exhaust port is arranged on the second chamber, an exhaust heat dissipation pipe is connected to the exhaust port, the exhaust heat dissipation pipe is connected with the distribution valve assembly through a first connecting pipe, and a secondary air inlet is connected with the distribution valve assembly through a second connecting pipe. The two-stage compression air pump structure is adopted, and the problems of the existing air supply unit, such as large volume, heavy quality, large noise and poor heat dissipation effect, are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile air suspension, in particular to an integrated air supply unit of air suspension. BACKGROUND

[0002] As an important part of automobile active suspension system, air suspension is mainly composed of air supply unit, air spring, damping device, lateral stabilizer, height valve, guiding force transmission mechanism, air tank (AT) and pipeline, and can adjust the stiffness and damping of suspension in real time according to the motion state of automobile and road conditions, so that the suspension system is in the best damping state, and the vehicle has good comfort under various road conditions. With the development of people's requirement for vehicle riding comfort and suspension technology, air suspension is widely used in large passenger cars, heavy trucks, special vehicles and high-end small cars.

[0003] As the core component of air suspension system, air supply unit can compress and charge air spring, and provide power for realizing the function of adjusting the stiffness and damping of air suspension. At present, the air supply unit used in the domestic market of automobile air suspension is mainly single-stage compression mode, and the output gas pressure is low, which leads to low adjustment sensitivity of automobile air suspension system, and is not suitable for high-end cars. Meanwhile, the air supply unit has the defects of large volume, heavy weight, large noise and poor heat dissipation effect. SUMMARY

[0004] The present application provides an integrated air supply unit of air suspension, which adopts two-stage compression pump structure to solve the problems of large volume, heavy weight, large noise and poor heat dissipation effect of the existing air supply unit.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an integrated air supply unit of air suspension, comprising: a damping support; a motor installed on the damping support; a compression pump body provided at one end of the motor, wherein the main shaft of the motor is inserted into the compression pump body; a distribution valve assembly installed on one side of the motor; an operating inner cavity is arranged in the compression pump body, and a first chamber and a second chamber are respectively arranged on both sides of the operating inner cavity, first and second compression cavities are respectively arranged at both ends of the operating inner cavity, a first piston is movably arranged in the first compression cavity, and a second piston is arranged in the second compression cavity, wherein the first and second pistons are driven by the main shaft of the motor to move in the same direction and in the axial direction;

[0006] The first and second compression cavities are respectively connected with the first chamber through a first one-way valve and a second one-way valve, the second chamber is connected with the second compression cavity, an exhaust port connected with the second chamber is installed on the compression pump body, an exhaust heat dissipation pipe is connected to the exhaust port, and a two-stage air inlet connected with the first chamber is also installed on the compression pump body.

[0007] The exhaust heat dissipation pipe is connected with the distribution valve assembly through the first connecting pipe, and the secondary air inlet is connected with the distribution valve assembly through the second connecting pipe.

[0008] As a preferred, the compression pump body is provided with a spring exhaust inlet communicated with the operation inner cavity, the end of the motor is provided with a primary air inlet, the spring exhaust inlet is communicated with the primary air inlet, and the spring exhaust inlet is further communicated with the distribution valve assembly through the third connecting pipe.

[0009] As a preferred, the damping support is further provided with a heat dissipation fan, the heat dissipation fan is arranged close to the compression pump body, and the air flow generated by the heat dissipation fan passes through the exhaust heat dissipation pipe.

[0010] As a preferred, one side of the distribution valve assembly is provided with a dryer, the dryer comprises a dryer shell, the dryer shell is divided into at least two drying chambers, one end of the dryer shell is provided with a sealing cover for closing the drying chamber, one side of the sealing cover is provided with a compression spring extending into the drying chamber, the compression spring is used for pressing the drying agent in the drying chamber, and a drying hole communicated with the distribution valve assembly is arranged on the side wall of the drying chamber.

[0011] As a preferred, the distribution valve assembly comprises a distribution valve body, a plurality of control valves arranged in the distribution valve body and a coil assembly corresponding to the control valves, and the distribution valve body is tightly connected with the dryer.

[0012] As a preferred, one end of the second piston is inserted into one end of the first piston, one end of the second piston inserted into the first piston is connected with the eccentric wheel on the motor main shaft, and one end of the first piston is connected with the second piston through a rotating pin.

[0013] As a preferred, the compression pump body is provided with a valve cavity communicated with the operation inner cavity, and the valve cavity is provided with a power limiting valve.

[0014] As a preferred, one end of the compression pump body is closed by the first end cover, and the first chamber and the second chamber are closed by the second end cover.

[0015] As a preferred, the damping support comprises a bottom plate and a plurality of side plates arranged around the bottom plate, a plurality of damping connecting heads are arranged on the top of the side plates and the upper side of the bottom plate, and the bottom plate is further provided with a positioning pin corresponding to the distribution valve assembly.

[0016] As a preferred, one end of the exhaust heat dissipation pipe is inserted into one end of the fixing hole seat on the compression pump body, and the other end of the fixing hole seat is provided with an air pipe connecting head for connecting the first connecting pipe.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] (1) The motor, pump body and distribution valve assembly are assembled together by the damping support, the volume of the whole system is reduced, the damping effect is good, the noise during operation can be reduced, the distribution valve assembly can integrate multiple valves, the stroke of gas operation is reduced, and the operation efficiency is improved.

[0019] (2) The compression pump body adopts a two-stage structure, one-stage compression is realized through the first compression cavity, and then two-stage compression is realized through the second compression cavity, so that higher output gas pressure can be achieved.

[0020] (3) The first chamber and the second chamber are arranged on both sides of the running inner cavity, the structure is compact, the first chamber can realize communication between the first compression cavity and the second compression cavity, and the second chamber is used for outputting high pressure to form a smooth circulation.

[0021] (4) The power limiting valve is installed, when the power of the gas supply unit is too large, the power limiting valve can be opened to guide the high-pressure gas into the pump inlet, which can better prevent the plunger pump from being blocked and protect the air suspension gas supply unit.

[0022] (5) The exhaust heat dissipation pipe is installed, and the cooling fan is installed, which can quickly cool the discharged high-pressure compressed gas in combination with the exhaust heat dissipation pipe, reduce the temperature, and avoid damaging other parts of the whole air suspension. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a perspective view of the present application;

[0024] Figure 2 is a top view of the present application;

[0025] Figure 3 is a perspective view of the damping support of the present application;

[0026] Figure 4 is a front view of the motor and compression pump of the present application;

[0027] Figure 5 is a perspective view of the motor and compression pump of the present application;

[0028] Figure 6 is a front view of the motor and compression pump of the present application;

[0029] Figure 7 is a B-B sectional view of Figure 4 ;

[0030] Figure 8 is a B-B sectional view of Figure 4C-C toward the sectional view structure diagram of the profile;

[0031] Figure 9 The direction of the compression pump of the application is removed after the end cover structure diagram of the profile;

[0032] Figure 10 The direction of the compression pump of the application is removed after the end cover structure diagram of the profile;

[0033] Figure 11 The structure diagram of the third one-way valve of the application;

[0034] Figure 12 The structure diagram of the second one-way valve of the application;

[0035] Figure 13 The principle diagram of the air supply system of the application.

[0036] Reference signs:

[0037] 1, shock absorbing support, 11, first chamber, 12, second chamber, 13, first one-way valve, 14, valve chamber, 15, fourth one-way valve, 16, first blocking part, 17, fixed part, 18, first arc-shaped elastic sheet, 19, second air inlet hole, 2, motor, 21, second blocking part, 22, center plate, 23, connecting hole, 24, second arc-shaped elastic sheet, 26, third connecting pipe, 27, fixed hole seat, 28, third one-way valve, 3, dryer, 31, running inner cavity, 32, first compression cavity, 33, second compression cavity, 34, first piston, 35, second piston, 36, rotating pin, 37, eccentric wheel, 38, bearing, 39, first air inlet hole, 4, compression pump body, 41, second end cover, 42, communication flow channel, 45, first end cover, 46, exhaust port, 47, power limiting valve, 48, second-stage air inlet, 49, spring exhaust inlet, 5, heat dissipation fan, 51, compression spring, 53, sealing cover, 57, drying cavity, 58, drying hole, 6, exhaust heat dissipation pipe, 61, shock absorbing connecting head, 62, positioning pin, 63, side plate, 64, heat dissipation fan support plate, 65, bottom plate, 7, second connecting pipe, 8, first connecting pipe, 9, distribution valve assembly, 91, distribution valve body, 92, control valve, 93, pressure sensor, 94, coil assembly, 10, first-stage air inlet. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application.

[0039] As Figures 1-12As shown, the scheme of the present application adopts two-stage compression air pump structure, solves the problems of large volume, heavy quality, large noise and poor heat dissipation effect of the existing air supply unit, and provides the following technical scheme: an integrated air supply unit of air suspension, comprising: a damping support 1 and a motor 2, the motor 2 is installed on the damping support 1; a compression pump body 4 is arranged at one end of the motor 2, the main shaft of the motor 2 is inserted into the compression pump body 4; a distribution valve assembly 9 is installed on one side of the motor 2; the inside of the compression pump body 4 is provided with a running inner cavity 31 and a first chamber 11 and a second chamber 12 arranged on both sides of the running inner cavity 31 respectively, both ends of the running inner cavity 31 are respectively provided with a first compression cavity 32 and a second compression cavity 33, a first piston 34 is movably arranged in the first compression cavity 32, a second piston 35 is arranged in the second compression cavity 33, the first piston 34 and the second piston 35 are driven by the main shaft of the motor 2 to move in the same direction and axially;

[0040] The first compression cavity 32 and the second compression cavity 33 are respectively connected with the first chamber 11 through a first one-way valve 13 and a second one-way valve 20, the second chamber 12 is connected with the second compression cavity 33, an exhaust port 46 connected with the second chamber 12 is installed on the compression pump body 4, an exhaust heat dissipation pipe 6 is connected with the exhaust port 46, and a two-stage air inlet port 48 connected with the first chamber 11 is also installed on the compression pump body 4.

[0041] The exhaust heat dissipation pipe 6 is connected with the distribution valve assembly 9 through a first connecting pipe 8, and the two-stage air inlet port 48 is connected with the distribution valve assembly 9 through a second connecting pipe 7.

[0042] Specific, compression pump body 4 is integrally formed structure, its overall flat, its outer surface is evenly distributed with heat dissipation ribs, can effectively improve the overall heat dissipation effect of compression pump body 4, motor 2 as output power source, its main shaft can install eccentric wheel 37, as a specific embodiment of motor 2 driving first piston 34 and second piston 35 activity, the second piston 35 is inserted into one end of the first piston 34, and the second piston 35 is inserted into one end of the first piston 34 and connected with eccentric wheel 37, one end of the first piston 34 is connected with the second piston 35 through a rotating pin 36, when the eccentric wheel 37 rotates, it will push the second piston 35 to swing and move axially, while the second piston 35 swings and moves axially, it drives the first piston 34 to move axially, in the actual application process, the end surface area of the first piston 34 is larger than that of the second piston 35, so that the compression effect of the first stage is better than that of the second stage, and the end surface of the first piston 34 and the second piston 35 is provided with a leather cup, which is in contact with the side wall of the first compression chamber 32 and the second compression chamber 33, and the leather cup is tightly fixed by a supporting ring, bearings 38 are installed between the eccentric wheel 37 and the second piston 35, the rotating pin 36 is sleeved with a wear-resistant ring between the first piston 34 and the second piston 35, so as to prolong the service life of the rotating pin 36 and reduce noise.

[0043] In use, as the first piston 34 retreats in the first compression chamber 32, low pressure air is sucked into the first compression chamber 32, then the first piston 34 advances in the first compression chamber 32, compresses the gas in the first compression chamber 32 and enters the first chamber 11 through the first one-way valve 13, at the same time, the second piston 35 in the second compression chamber 33 retreats, sucking the first stage compressed gas flow in the first chamber 11 into the second compression chamber 33, then the second piston 35 in the second compression chamber 33 advances, compresses and extrudes the gas in the second compression chamber 33 to the second chamber 12, the gas entering the second chamber 12 is high pressure gas, the fourth one-way valve 15 can be installed between the second compression chamber 33 and the second chamber 12, the high pressure gas entering the second chamber 12 is discharged into the exhaust heat dissipation pipe 6 through the exhaust port 46, and then into the gas supply system, the exhaust heat dissipation pipe 6 can cool the high pressure gas, specifically, the exhaust heat dissipation pipe 6 is a finned heat dissipation pipe, which is uniformly arranged on the outer wall of the metal pipe, and the contact area between the outer wall of the metal pipe and the air can be greatly increased through the finned heat dissipation pipe, so that the high pressure gas in the exhaust heat dissipation pipe 6 can be quickly cooled. Figure 10As shown, one end of the exhaust heat dissipation pipe 6 is inserted into one end of the fixed hole seat 27 on the compression pump body 4, and the other end of the fixed hole seat 27 is provided with an air pipe connector. The fixed hole seat 27 is a part of the compression pump body 4, which is a transversely arranged perforated hole, preferably arranged below the second compression chamber 33. After the exhaust heat dissipation pipe 6 comes out of the exhaust port 46, it can bypass a certain distance from above to below and be connected to the fixed hole seat 27, thereby fixing both ends of the exhaust heat dissipation pipe 6. The air pipe connector at the end of the fixed hole seat 27 can be externally connected to an air pipe for communication with the distribution valve assembly 9. Specifically, the exhaust heat dissipation pipe 6 is connected to the distribution valve assembly 9 through the first connecting pipe 8, and the second-stage air inlet 48 is connected to the distribution valve assembly 9 through the second connecting pipe 7.

[0044] In order to effectively utilize the air flow generated by the air spring during the air supply system of the entire air suspension, the compression pump body 4 is provided with a spring exhaust inlet 49 connected to the running inner cavity 31. The spring exhaust inlet 49 is connected to each air spring through a pipe with a control valve. The end of the motor 2 is provided with a first-stage air inlet 10. The spring exhaust inlet 49 is connected to the first-stage air inlet 10. The spring exhaust inlet 49 is also connected to the distribution valve assembly 9 through the third connecting pipe 26. The gas in the running inner cavity 31 can be discharged through the first-stage air inlet 10. Similarly, the first-stage air inlet 10 can be used for air intake during the operation of the compression pump. The first-stage air inlet 10 can be externally connected to an air pipe and can be installed at the end of the motor 2 away from the compression pump body 4.

[0045] In this embodiment, in order to further improve the heat dissipation effect of the exhaust heat dissipation pipe 6, the shock-absorbing support 1 is also provided with a heat dissipation fan 5. The heat dissipation fan 5 is arranged close to the compression pump body 4 and the air flow generated thereby passes through the exhaust heat dissipation pipe 6. The exhaust heat dissipation pipe 6 is disc-shaped, so the heat dissipation fan 5 can face the exhaust heat dissipation pipe 6 and blow air from the side of the compression pump body 4 to the motor 2, thereby quickly removing heat.

[0046] Further, one side of the distribution valve assembly 9 is provided with a dryer 3, the dryer 3 comprises a dryer housing 50, the dryer housing 50 is divided into at least two drying chambers 57, one end of the dryer housing 50 is provided with a sealing cover 53 for closing the drying chamber 57, one side of the sealing cover 53 is provided with a compression spring 51 extending into the drying chamber 57, the compression spring 51 is used to press the drying agent inside the drying chamber 57, the side wall of the drying chamber 57 is provided with a drying hole 58 in communication with the distribution valve assembly 9, the drying chamber 57 can be filled with various drying agents such as calcium chloride, silica gel, montmorillonite and the like, the compression spring 51 can compact the drying agent, the distribution valve assembly 9 is in communication with the drying chamber 57, the drying of the inside of the distribution valve assembly 9 is realized through the external dryer 3, and the inside of the drying chamber 57 is also provided with filter cotton for filtering the gas entering the drying chamber 57, preventing the inside of the drying chamber 57 from being contaminated, and the sealing cover 53 can be opened to replace the drying agent.

[0047] Specifically, as a specific structure of the distribution valve assembly 9, the distribution valve assembly 9 comprises a distribution valve body 91, a plurality of control valves 92 arranged in the distribution valve body 91, and a coil assembly 94 corresponding to the control valves 92, the distribution valve body 91 is tightly connected with the dryer 3, the control valve 92 is an electromagnetic valve, which is various, and through the arrangement of the pipeline inside the distribution valve body 91, a complex control pipeline corresponding to the control valve 92 can be formed, avoiding the arrangement of the pipeline, and the integration degree is high, the coil assembly 94 is also designed as a plate structure, the internal circuit of which corresponds to each control valve 92, and an external socket is arranged on one side of the coil assembly 94 for connecting power supply, at the same time, a pressure sensor 93 can be selectively installed on the control valve 92 for detecting the air pressure in the distribution valve body 91.

[0048] In order to protect the compression pump, the compression pump body 4 is provided with a valve cavity 14 in communication with the running inner cavity 31, the valve cavity 14 is provided with a power limiting valve 47, the limiting valve 47 is set to be multi-stage adjustable, which can effectively avoid the pressure being too high due to the blockage of the gas circuit, and the compression pump body 4 can be provided with a plug, and the plug can be removed to open the running inner cavity 31 for maintenance and other operations.

[0049] In order to facilitate assembly, one end of the compression pump body 4 is closed by the first end cover 45 to seal the first compression chamber 32, and the other end of the compression pump body 4 is closed by the second end cover 41 to seal and separate the first chamber 11 and the second chamber 12, and the first end cover 45 can be transversely provided with a communication flow channel 42, which can communicate the first compression chamber 32 and the first one-way valve 13, and the first end cover 5 and the second end cover 41 are both provided with sealing rings between the compression pump body 4, and the sealing ring between the second end cover 41 and the compression pump body 4 can also seal and separate the first chamber 11 and the second chamber 12.

[0050] In order to realize the rapid intake of the first compression chamber 32, as shown in Figure 6 and 11 , the first piston 34 is provided with a plurality of first intake holes 39 communicating with the operation inner cavity 31, and the first piston 34 is provided with a third one-way valve 28 sealing the first intake hole 39, specifically, the first piston 34 is provided with a plurality of first intake holes 39, and the third one-way valve 28 includes a center plate 22, the center plate 22 is provided with a connecting hole 23 in the middle, and the two ends of the center plate 22 are respectively connected with a second arc-shaped elastic sheet 24, so that the third one-way valve 28 is in the shape of "H", the second arc-shaped elastic sheet 24 is provided with a second sealing part 21 corresponding to the first intake hole 41 for sealing, the first intake hole 41 is preferably 4, and is arranged in a rectangular shape, so that the entire third one-way valve 28 is in a symmetrical structure of a sheet, and the connecting hole 23 on the center plate 22 can be connected with a screw to be fixed on the first piston 34, and when the first intake hole 39 intakes, the four second sealing parts 21 can be pushed away at the same time, and after the intake is completed, the second sealing part 21 automatically rebounds to seal the first intake hole 39 due to the elasticity of the second arc-shaped elastic sheet 24, and the third one-way valve 28 adopts a special-shaped structure, which can meet the intake requirement of the first compression chamber 32.

[0051] Similarly, as shown in Figure 12 , the second one-way valve 20 is installed on the inner side wall of the second compression chamber 33 for sealing the second intake hole 19 on the side wall of the second compression chamber 33, the second one-way valve 20 includes a fixed part 17 connected with the side wall of the second compression chamber 33, the fixed part 17 is provided with a connecting hole 23, one end of the fixed part 17 is provided with a first arc-shaped elastic sheet 18, one end of the first arc-shaped elastic sheet 18 is provided with a first sealing part 16 for sealing the second intake hole 19, and the first arc-shaped elastic sheet 18 is in a roll shape, so that the first sealing part 16 has sufficient elasticity to seal the second intake hole 19.

[0052] In the embodiment, the damping support 1 comprises a bottom plate 65 and a plurality of side plates 63 arranged around the periphery of the bottom plate 65, the top of the side plates 63 and the upper side of the bottom plate 65 are provided with a plurality of damping connectors 61, the bottom plate 65 is further provided with a positioning pin 62 corresponding to the distribution valve assembly 9, the side plates 63 can effectively protect the motor 2, the distribution valve assembly 9 and the compression pump body 4, the damping connector 61 is composed of a connecting column and a rubber pad sleeved outside the connecting column, and can play a damping role when the damping support 1 is installed with the vehicle body, while the damping connector 61 on the bottom plate 65 can damp and support the motor 2, the distribution valve assembly 9 and the compression pump body 4, reduce noise, and the bottom plate 65 is further provided with a heat dissipation fan support plate 64, which can effectively and firmly support the heat dissipation fan.

[0053] As shown in the specific system composition of the distribution valve assembly 9, Figure 13 As shown in the specific system composition of the distribution valve assembly 9,

[0054] The air suspension air supply unit system principle diagram is shown in the accompanying Figure 13 The control valve 92 part of the whole system comprises air valves AV1, AV2, AV3, AV4, switching valves SV1, SV2, pneumatic control valves ACV, pressure limiting valves ASV, flow valves FV, and tire inflation valves IV; the pipeline A1 is arranged between the first air inlet 10 and the compression pump body 4, and the air filter AC is installed on the pipeline A1; the pipeline A2 is arranged between the first one-way valve 13 and the first air outlet one-way valve 15; the pipeline A3 is arranged between the second air inlet 48 and the exhaust heat dissipation pipe 6; the pipelines B1 and B2 are respectively arranged between the exhaust heat dissipation pipe 6 and the dryer 3 and the pressure limiting valve ASV; the pipeline C1 is arranged between the dryer 3 and the pressure limiting valve ASV; the pipeline C2 is arranged between the pressure limiting valve ASV and the compression pump body 4; the pipeline D1 is arranged between the dryer 3 and the switching valve SV2; the pipeline D2 is arranged between the switching valve SV2 and the air tank AT; the pipeline D3 is arranged between the switching valve SV1 and the first one-way valve 13; and the pipelines F1-F4 are arranged between the dryer 3 and the air valves AV1, AV2, AV3 and AV4. The above-mentioned various pipelines can be internal channels of the compression pump body 4 and the distribution valve assembly 9, or can be independent connecting pipes externally connected.

[0055] Inflation mode: When the vehicle is at rest or in motion, the air suspension tank charging unit fills the tank AT. The system first connects the electromagnetic valve SV-2, then the compressor and the tank AT, the air enters the compression pump body 4 from the first air inlet 10, passes through the pipeline A3 through the exhaust heat pipe 6, then through the pipeline B1 through the dryer 3, then through the pipeline D1 through the electromagnetic valve SV-2, and finally through the pipeline D2 into the tank AT to fill the tank AT; When the pressure of the tank AT is at least higher than the pressure in the air spring to be adjusted by a certain value, the motor does not run, and the air spring is directly pressurized by the tank AT.

[0056] Lift the vehicle body: Switch the valve SV-2, air valves AV1, AV2, AV3, AV4 on, the compressed gas in the tank AT is connected through the pipeline D2 through the switching valve SV-2, and finally through the pipeline F1-F4 through the air valves AV1, AV2, AV3, AV4 to pressurize the air spring, the vehicle body is lifted, the tank AT is used first during the adjustment process when the vehicle is stationary and low-speed driving, to improve the vehicle acoustic system; When the tank AT pressure is less than a certain value, the tank AT is not connected, the motor is running: the air valves AV1, AV2, AV3, AV4 are powered on, the air enters the compression pump body 4 from the first air inlet 10, passes through the second one-way valve 20, the first one-way valve 13, the first exhaust one-way valve 15, the second air inlet 48, and the pipeline A1, A2, A3, and then enters the exhaust heat pipe 6, then passes through the pipeline B1 through the dryer 3, one way through the pipeline D1 through the pipeline F1-F4 and the air valve AV1, AV2, AV3, AV4 to pressurize the air spring, and the vehicle body is lifted.

[0057] Quick start mode: When the pressure needs to be quickly established, the tank AT is connected, and the motor is running: the switching valve SV-1 and the air valves AV1, AV2, AV3, AV4 are powered on, the compressed air in the tank AT is connected through the pipeline D2 through the switching valve SV-1, introduced into the second compression chamber 33 through the pipeline A2, then through the pipeline A3 through the exhaust heat pipe 6, then through the pipeline B1 through the dryer 3, one way through the pipeline D1 through the pipeline F1-F4 and the air valve AV1, AV2, AV3, AV4 to pressurize the air spring, and the vehicle body is lifted. When needed, this mode can quickly establish pressure, and this function uses the tank AT pressure.

[0058] Deflation mode: the pneumatic control valve ACV and air valves AV1, AV2, AV3, AV4 are powered, the gas in the air spring is discharged through the air valves AV1, AV2, AV3, AV4, the pipeline F1-F4, the pipeline D1, the dryer 3, the pipeline B1, B2, the flow valve FV, the pressure limiting valve ASV, and finally the pipeline C2, the vehicle body is lowered. The gas is discharged through the pipeline D1, C1, the pneumatic control valve ACV, the pressure is applied to the control interface of the pressure limiting valve, the pressure limiting valve ASV is switched to the open position, the pressure limiting valve is provided with a plurality of adjustable safety pressure levels, which can effectively avoid the pressure being too high due to air path blockage, the flow valve FV can realize multi-stage adjustment in the deflation stage, and the driving feeling is increased. In addition, the tire inflation valve IV is installed, the tire inflation function is increased, and the under-pressure tire is directly inflated by the compressor, which is convenient and practical.

[0059] It should be noted that all directional indications, such as upper, lower, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0060] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0061] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that an ordinary skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

Claims

1. An integrated air supply unit for an air suspension system, characterized in that, include: Vibration damping bracket (1); The motor (2) is mounted on the shock absorber bracket (1); A compression pump body (4) is set at one end of a motor (2), and the main shaft of the motor (2) is inserted into the compression pump body (4); The distribution valve assembly (9) is installed on one side of the motor (2); The compressor body (4) is provided with an internal running cavity (31) and a first chamber (11) and a second chamber (12) respectively provided on both sides of the running cavity (31). The two ends of the running cavity (31) are respectively provided with a first compression chamber (32) and a second compression chamber (33). A first piston (34) is movably arranged in the first compression chamber (32), and a second piston (35) is arranged in the second compression chamber (33). The first piston (34) and the second piston (35) are driven by the main shaft of the motor (2) to move axially in the same direction. The first compression chamber (32) and the second compression chamber (33) are respectively connected to the first chamber (11) through the first check valve (13) and the second check valve (20). The second chamber (12) is connected to the second compression chamber (33). The compression pump body (4) is equipped with an exhaust port (46) connected to the second chamber (12). An exhaust heat dissipation pipe (6) is connected to the exhaust port (46). The compression pump body (4) is also equipped with a secondary air inlet (48) connected to the first chamber (11). The exhaust heat dissipation pipe (6) is connected to the distribution valve assembly (9) through the first connecting pipe (8), and the secondary air inlet (48) is connected to the distribution valve assembly (9) through the second connecting pipe (7). One end of the compression pump body (4) is sealed by the first end cap (45) to the first compression chamber (32), and the other end of the compression pump body (4) is sealed by the second end cap (41) to the first chamber (11) and the second chamber (12). A connecting flow channel (42) is provided horizontally on the first end cap (45), and the connecting flow channel (42) connects the first compression chamber (32) and the first one-way valve (13). A sealing ring is installed between the first end cap (45) and the second end cap (41) and the compression pump body (4), wherein the sealing ring between the second end cap (41) and the compression pump body (4) seals and separates the first chamber (11) and the second chamber (12). The shock-absorbing bracket (1) includes a base plate (65) and several side plates (63) arranged around the base plate (65). Several shock-absorbing connectors (61) are installed on the top of the side plates (63) and the upper side of the base plate (65). The base plate (65) is also provided with positioning pins (62) corresponding to the distribution valve assembly (9).

2. The integrated air supply unit for air suspension according to claim 1, characterized in that: The compressor body (4) is provided with a spring exhaust inlet (49) that communicates with the running inner cavity (31). The motor (2) is equipped with a first-stage air inlet (10) at its end. The spring exhaust inlet (49) is connected to the first-stage air inlet (10). The spring exhaust inlet (49) is also connected to the distribution valve assembly (9) through a third connecting pipe (26).

3. The integrated air supply unit for air suspension according to claim 1, characterized in that: The shock-absorbing bracket (1) is also equipped with a cooling fan (5), which is located close to the compressor body (4) and the airflow generated by it passes through the exhaust heat dissipation pipe (6).

4. The integrated air supply unit for air suspension according to claim 1, characterized in that: A dryer (3) is installed on one side of the distribution valve assembly (9). The dryer (3) includes a dryer housing (50) which is divided into at least two drying chambers (57). A sealing cover (53) is provided at one end of the dryer housing (50) to close the drying chamber (57). A compression spring (51) is provided on one side of the sealing cover (53) to extend into the drying chamber (57). The compression spring (51) is used to press down the desiccant inside the drying chamber (57). A drying hole (58) communicating with the distribution valve assembly (9) is provided on the side wall of the drying chamber (57).

5. The integrated air supply unit for air suspension according to claim 4, characterized in that: The distribution valve assembly (9) includes a distribution valve body (91), a plurality of control valves (92) disposed in the distribution valve body (91), and a coil assembly (94) corresponding to the control valves (92). The distribution valve body (91) is tightly connected to the dryer (3).

6. The integrated air supply unit for air suspension according to claim 1, characterized in that: One end of the second piston (35) is inserted into one end of the first piston (34), and the end of the second piston (35) inserted into the first piston (34) is connected to the eccentric wheel (37) on the main shaft of the motor (2). One end of the first piston (34) is connected to the second piston (35) through a rotating pin (36).

7. The integrated air supply unit for air suspension according to claim 1, characterized in that: The compression pump body (4) is provided with a valve chamber (14) that communicates with the operating inner cavity (31), and a power limiting valve (47) is installed in the valve chamber (14).

8. The integrated air supply unit for air suspension according to claim 1, characterized in that: One end of the exhaust heat dissipation pipe (6) is inserted into one end of the fixing hole seat (27) on the compressor body (4), and the other end of the fixing hole seat (27) is provided with an air pipe connector for connecting the first connecting pipe (8).

Images