CN114714842A

CN114714842A - Integrated air supply unit of air suspension

Info

Publication number: CN114714842A
Application number: CN202210321614.4A
Authority: CN
Inventors: 蒋开洪; 王伟玮; 赵亚龙; 危亮亮
Original assignee: Ningbo Tuopu Group Co Ltd
Current assignee: Ningbo Tuopu Group Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-08

Abstract

The invention discloses an integrated air supply unit of an air suspension, which comprises a damping bracket and a motor, wherein the motor and a compression pump body are arranged on the damping bracket; the distribution valve assembly is arranged on one side of the motor; an operation inner cavity, a first cavity and a second cavity are arranged in the compression pump body, a first compression cavity and a second compression cavity are respectively arranged at two ends of the operation inner cavity, a first piston and a second piston are arranged in the operation inner cavity, and the first piston and the second piston are driven by a main shaft of a motor to axially move in the same direction; first compression chamber and second compression chamber all are linked together with first cavity, and the second cavity is linked together with the second compression chamber and sets up the gas vent on the second cavity, are connected with the exhaust cooling tube on the gas vent, and the exhaust cooling tube links to each other with the distributing valve assembly through first connecting pipe, and the second grade air inlet links to each other with the distributing valve assembly through the second connecting pipe. The invention adopts a two-stage compression air pump structure, and solves the problems of large volume, heavy mass, large noise and poor heat dissipation effect of the existing air supply unit.

Description

Integrated air supply unit of air suspension

Technical Field

The invention relates to the field of automobile air suspensions, in particular to an integrated air supply unit of an air suspension.

Background

The air suspension is used as an important part of an automobile active suspension system and mainly comprises an air supply unit, an air spring, a damping device, a transverse stabilizer, a height valve, a guide force transmission mechanism, an air storage tank (AT) and a pipeline, and the rigidity and the damping of the suspension can be adjusted in real time according to the motion state and the road surface condition of an automobile, so that the suspension system is in the optimal damping state, and the automobile has good comfort under various road surface conditions. With the requirement of people on the riding comfort of vehicles and the development of suspension technology, the air suspension is widely applied to large buses, trucks, special vehicles and high-grade small automobiles.

The air supply unit is used as a core component of the air suspension system, can compress air and fill the air spring, and provides source power for realizing the functions of adjusting rigidity and damping of the air suspension. At present, the existing air supply unit for the automobile air suspension in the domestic market is mainly in a single-stage compression mode, and the pressure of output gas is low, so that the adjustment sensitivity of an automobile air suspension system is low, and the automobile air suspension system is not suitable for high-grade automobiles; meanwhile, the device has the defects of large volume, heavy mass, large noise and poor heat dissipation effect.

Disclosure of Invention

The invention provides an integrated air supply unit of an air suspension, which adopts a two-stage compression air pump structure and solves the problems of large volume, heavy mass, large noise and poor heat dissipation effect of the existing air supply unit.

In order to achieve the purpose, the invention provides the following technical scheme: an integrated air supply unit for an air suspension comprising: a shock-absorbing support; the motor is arranged on the damping bracket; the compression pump body is arranged at one end of the motor, and a main shaft of the motor is inserted into the compression pump body; the distribution valve assembly is arranged on one side of the motor; an operation inner cavity, a first cavity and a second cavity are arranged in the compression pump body and are respectively arranged on two sides of the operation inner cavity, a first compression cavity and a second compression cavity are respectively arranged at two ends of the operation inner cavity, a first piston is movably arranged in the first compression cavity, a second piston is arranged in the second compression cavity, and the first piston and the second piston are driven by a main shaft of a motor to axially move in the same direction;

the first compression cavity and the second compression cavity are respectively communicated with the first cavity through a first one-way valve and a second one-way valve, the second cavity is communicated with the second compression cavity, an exhaust port communicated with the second cavity is arranged on the compression pump body, an exhaust radiating pipe is connected to the exhaust port, and a secondary air inlet communicated with the first cavity is also arranged on the compression pump body;

the exhaust radiating pipe is connected with the distribution valve assembly through a first connecting pipe, and the secondary air inlet is connected with the distribution valve assembly through a second connecting pipe.

Preferably, the compression pump body is provided with a spring exhaust inlet communicated with the operation inner cavity, the end part 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 a third connecting pipe.

Preferably, the shock absorption bracket 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.

Preferably, a dryer is installed on one side of the distribution valve assembly, the dryer comprises a dryer shell, the dryer shell is divided into at least two drying chambers, a sealing cover for sealing the drying chambers is arranged at one end of the dryer shell, a compression spring extending into the drying chambers is arranged on one side of the sealing cover, the compression spring is used for pressing drying agents in the drying chambers, and drying holes communicated with the distribution valve assembly are formed in the side wall of each drying chamber.

Preferably, 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 connected with the dryer in a clinging manner.

Preferably, one end of the second piston is inserted into one end of the first piston, and one end of the second piston inserted into the first piston is connected with an eccentric wheel on a main shaft of the motor, and one end of the first piston is connected with the second piston through a rotating pin.

Preferably, the compression pump body is provided with a valve cavity communicated with the operation inner cavity, and a power limiting valve is installed in the valve cavity.

Preferably, one end of the compression pump body closes the first compression cavity through the first end cover, and the other end of the compression pump body closes the first cavity and the second cavity through the second end cover.

Preferably, the damping support comprises a bottom plate and a plurality of side plates arranged on the periphery of the bottom plate, a plurality of damping connectors are arranged at the tops of the side plates and the upper side of the bottom plate, and the bottom plate is further provided with positioning contact pins corresponding to the distribution valve assembly.

Preferably, one end of the exhaust radiating pipe is inserted into one end of a fixed hole seat on the compression pump body, and the other end of the fixed hole seat is provided with a gas pipe connector for connecting a first connecting pipe.

Compared with the prior art, the invention has the beneficial effects that:

(1) the motor, the pump body and the distribution valve assembly are integrated by using the damping support, so that the volume of the whole system is reduced, the damping effect is good, the noise in the operation process can be reduced, the distribution valve assembly can integrate a plurality of valves, the gas operation stroke is reduced, and the operation efficiency is improved;

(2) the compression pump body adopts the two-stage structure, realizes the one-level compression through first compression chamber, carries out the second grade compression through the second compression chamber after that, can reach higher output atmospheric pressure.

(3) The first cavity and the second cavity are respectively arranged on two sides of the operation inner cavity, the structure is compact, the first cavity can be communicated with the second compression cavity, and the second cavity is used for outputting high pressure to form smooth circulation.

(4) Install the power limiting valve, when air feed unit power was too big, can open the power limiting valve, with the leading-in pump entrance of high-pressure gas, can prevent plunger pump jam better, protection air suspension air feed unit.

(5) Install the exhaust cooling tube to install radiator fan, combine together with the exhaust cooling tube and can dispel the heat fast exhaust high-pressure compressed gas, reduce the temperature avoids damaging other parts of whole air suspension.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a perspective view of the shock mount of the present invention;

FIG. 4 is a schematic front view of the motor and compressor pump of the present invention;

FIG. 5 is a schematic perspective view of the motor and the compression pump of the present invention;

FIG. 6 is a front cross-sectional structural view of the motor and compression pump of the present invention;

FIG. 7 is a sectional view in elevation of the view from B-B of FIG. 4;

FIG. 8 is a cross-sectional structural view taken along line C-C of FIG. 4;

FIG. 9 is a schematic view of a compressor pump of the present invention with the end caps removed and showing a perspective view in one direction;

FIG. 10 is a schematic view of another embodiment of the compressor pump of the present invention with the end cap removed;

FIG. 11 is a block diagram of a third one-way valve of the present invention;

FIG. 12 is a block diagram of a second one-way valve of the present invention;

fig. 13 is a schematic diagram of an air supply system of the present invention.

Reference numerals:

1. a shock-absorbing support 11, a first chamber 12, a second chamber 13, a first check valve 14, a valve chamber 15, a fourth check valve 16, a first blocking part 17, a fixing part 18, a first arc-shaped elastic sheet 19, a second air inlet hole 2, a motor 21, a second blocking part 22, a central plate 23, a connecting hole 24, a second arc-shaped elastic sheet 26, a third connecting pipe 27, a fixing hole seat 28, a third check valve 3, a drier 31, an operation inner cavity 32, a first compression cavity 33, a second compression cavity 34, a first piston 35, a second piston 36, a rotating pin 37, an eccentric wheel 38, a bearing 39, a first air inlet hole 4, a compression pump body 41, a second end cover 42, a communication flow passage 45, a first end cover 46, an air outlet 47, a power limiting valve 48, a secondary air inlet 49, a spring exhaust inlet, 5. the cooling fan comprises a cooling fan body 51, a compression spring 53, a sealing cover 57, a drying chamber 58, a drying hole 6, an exhaust cooling pipe 61, a damping connector 62, a positioning pin 63, a side plate 64, a cooling fan supporting plate 65, a bottom plate 7, a second connecting pipe 8, a first connecting pipe 9, a distribution valve assembly 91, a distribution valve body 92, a control valve 93, a pressure sensor 94, a coil assembly 10 and a primary air inlet.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 to 12, the present invention adopts a two-stage compression air pump structure, to solve the problems of large volume, heavy mass, large noise and poor heat dissipation effect of the existing air supply unit, and provides the following technical solutions: an integrated air supply unit for an air suspension comprising: the damping support 1 and the motor 2, the motor 2 is installed on the damping support 1; the compression pump body 4 is arranged at one end of the motor 2, and a main shaft of the motor 2 is inserted into the compression pump body 4; a distribution valve assembly 9 installed at one side of the motor 2; an operation inner cavity 31, a first cavity 11 and a second cavity 12 which are respectively arranged at two sides of the operation inner cavity 31 are arranged in the compression pump body 4, a first compression cavity 32 and a second compression cavity 33 are respectively arranged at two ends of the operation inner cavity 31, 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, and the first piston 34 and the second piston 35 are driven by a main shaft of the motor 2 to axially move in the same direction;

the first compression cavity 32 and the second compression cavity 33 are respectively communicated with the first cavity 11 through a first one-way valve 13 and a second one-way valve 20, the second cavity 12 is communicated with the second compression cavity 33, an exhaust port 46 communicated with the second cavity 12 is installed on the compression pump body 4, an exhaust radiating pipe 6 is connected on the exhaust port 46, and a secondary air inlet 48 communicated with the first cavity 11 is also installed on the compression pump body 4;

the exhaust and heat radiation pipe 6 is connected with the distribution valve assembly 9 through a first connection pipe 8, and the secondary air inlet 48 is connected with the distribution valve assembly 9 through a second connection pipe 7.

Specifically, the compression pump body 4 is of an integrally formed structure, the whole compression pump body is flat, heat dissipation ribs are uniformly distributed on the outer surface of the compression pump body, the whole heat dissipation effect of the compression pump body 4 can be effectively improved, the motor 2 serves as an output power source, an eccentric wheel 37 can be mounted on a main shaft of the motor, and as a specific embodiment that the motor 2 drives the first piston 34 and the second piston 35 to move, one end of the second piston 35 is inserted into one end of the first piston 34, one end of the second piston 35 inserted into the first piston 34 is connected with the 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, the second piston 35 is pushed to swing and move axially, when the second piston 35 swings and moves axially, the first piston 34 is driven to move axially, and in the practical application process, the end surface area of first piston 34 is greater than the end surface area of second piston 35, make the compression effect of one-level compression be superior to the effect of second grade compression, and all install the leather cup on the terminal surface of first piston 34 and second piston 35, the leather cup contacts sealedly with the lateral wall of first compression chamber 32 and second compression chamber 33, the leather cup is compressed tightly fixedly by the support ring, all install bearing 38 between eccentric wheel 37 and second piston 35, wherein all cup jointed wear ring between swivel pin 36 and first piston 34 and the second piston 35, improve swivel pin 36's life, and the noise reduction.

In use, as the first piston 34 retreats in the first compression chamber 32, the first compression chamber 32 sucks low-pressure air, then the first piston 34 advances in the first compression chamber 32 to compress the air in the first compression chamber 32 and enter the first chamber 11 through the first check valve 13, meanwhile, as the second piston 35 retreats in the second compression chamber 33 at this time, the air flow which is subjected to one-stage compression in the first chamber 11 is sucked into the second compression chamber 33, then the second piston 35 advances in the second compression chamber 33 to compress and extrude the air in the second compression chamber 33 into the second chamber 12, the air which enters the second chamber 12 is high-pressure air, and a fourth check valve 15 can be installed between the second compression chamber 33 and the second chamber 12, and the high-pressure air which enters the second chamber 12 is discharged into the exhaust and heat dissipation pipe 6 through the exhaust port 46, input the air supply system in, exhaust cooling tube 6 can cool down high-pressure gas, and is specific, exhaust cooling tube 6 be the fin cooling tube, the fin cooling tube is exactly that the align to grid is provided with radiating fin on the lateral wall of tubular metal resonator, can increase the area of contact of the lateral wall of tubular metal resonator and air by a wide margin through radiating fin, can cool off the high-pressure gas of carrying in the exhaust cooling tube 6 fast. Meanwhile, as shown in fig. 10, one end of the exhaust and heat dissipation pipe 6 is inserted into one end of the fixing hole seat 27 of the compression pump body 4, 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, the structure is a transversal through hole, preferably arranged below the second compression chamber 33, and the air exhausting and heat dissipating pipe 6 can detour a certain distance from the upper to the lower after coming out of the air exhausting opening 46, and is connected with the fixing hole seat 27, so as to realize the fixing of the two ends of the air exhausting and heat dissipating pipe 6, and the air pipe connector at the end of the fixing hole seat 27 may be externally connected with an air pipe for communicating with the distribution valve assembly 9, and, more specifically, the exhaust and heat radiation pipe 6 is connected with the distribution valve assembly 9 through a first connection pipe 8, and the secondary air inlet 48 is connected with the distribution valve assembly 9 through a second connection pipe 7.

In order to effectively utilize the air flow generated when the air spring is deflated in the air supply system of the whole air suspension, the compression pump body 4 is provided with a spring exhaust inlet 49 communicated with the operation inner cavity 31, the spring exhaust inlet 49 is communicated with each air spring through a pipeline with a control valve, the end part of the motor 2 is provided with a primary air inlet 10, the spring exhaust inlet 49 is communicated with the primary air inlet 10, the spring exhaust inlet 49 is also communicated with the distribution valve assembly 9 through a third connecting pipe 26, the air entering the operation inner cavity 31 can be exhausted through the primary air inlet 10, and similarly, the air can be introduced through the primary air inlet 10 when the compression pump operates, and the primary air inlet 10 can be externally connected with an air pipe and can be arranged at one end of the motor 2 far away from the compression pump body 4.

In this embodiment, in order to further improve the heat dissipation effect of the exhaust heat pipe 6, the damping bracket 1 is further provided with a heat dissipation fan 5, the heat dissipation fan 5 is disposed near the compression pump body 4 and the air flow generated by the heat dissipation fan passes through the exhaust heat pipe 6, and the exhaust heat pipe 6 is in a disc shape, so that the heat dissipation fan 5 can face the exhaust heat pipe 6 and blow air from one side of the compression pump body 4 to the direction of the motor 2, and the heat can be taken away quickly.

Further, the dryer 3 is installed at one side of the distribution valve assembly 9, the dryer 3 includes a dryer housing 50, the dryer housing 50 is divided into at least two drying chambers 57, a sealing cover 53 for sealing the drying chambers 57 is installed at one end of the dryer housing 50, a compression spring 51 extending into the drying chambers 57 is installed at one side of the sealing cover 53, the compression spring 51 is used for pressing the drying agent inside the drying chambers 57, a drying hole 58 communicated with the distribution valve assembly 9 is installed on a side wall of the drying chambers 57, the drying chambers 57 can be filled with various drying agents, such as calcium chloride, silica gel, montmorillonite, etc., the compression spring 51 can compact the drying agent, the distribution valve assembly 9 is communicated with the drying chambers 57, and the drying inside the distribution valve assembly 9 is realized through the external dryer 3, and the inside of drying chamber 57 still installs the filter pulp for filter the gas that enters into drying chamber 57, prevents that drying chamber 57 is inside to be contaminated, can change the drier after sealed lid 53 opens.

Specifically, as a specific structure of the distribution valve assembly 9, 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 connected to the dryer 3 in a close-fitting manner, the control valves 92 are solenoid valves, and the variety is various, a complex control pipeline matching with the control valves 92 can be formed by disposing the pipeline inside the distribution valve body 91, thereby avoiding the disposition of the pipeline, and the integration level is high, the coil assembly 94 is also designed into a plate structure, the circuit inside the coil assembly corresponds to each control valve 92, and an external socket is disposed on one side of the coil assembly 94 for connecting and supplying power, and meanwhile, a pressure sensor 93 can be selectively mounted on the control valve 92 for detecting the air pressure inside the distribution valve body 91.

In order to safely protect the compression pump, the compression pump body 4 is provided with a valve cavity 14 communicated with the operation inner cavity 31, a power limiting valve 47 is installed in the valve cavity 14, the pressure limiting valve 47 is set to be safe and pressure-adjustable in multiple stages, pressure overhigh caused by air path blockage can be effectively avoided, a plug can be installed at the upper end of the compression pump body 4, and the plug can be detached to open the operation inner cavity 31 for maintenance and other operations.

For convenience of assembly, one end of the compression pump body 4 seals the first compression cavity 32 through the first end cover 45, the other end of the compression pump body 4 seals the first cavity 11 and the second cavity 12 through the second end cover 41, the first end cover 45 can be transversely provided with a communication flow passage 42, the communication flow passage 42 can communicate with the first compression cavity 32 and the first check valve 13, sealing rings are mounted between the first end cover 5 and the compression pump body 4 and between the second end cover 41 and the compression pump body 4, and the first cavity 11 and the second cavity 12 can be sealed and separated through the sealing rings between the second end cover 41 and the compression pump body 4.

In order to realize the fast air intake of the first compression cavity 32, as shown in fig. 6 and 11, a plurality of first air intake holes 39 communicated with the operation inner cavity 31 are opened on the first piston 34, a third check valve 28 for blocking the first air intake holes 39 is installed on the first piston 34, specifically, a plurality of first air intake holes 39 on the first piston 34 are provided, the third check valve 28 includes a central plate 22, a connection hole 23 is provided in the middle of the central plate 22, the two ends of the central plate 22 are respectively connected with a second arc-shaped elastic sheet 24, so that the third check valve 28 is in an "H" shape, the second arc-shaped elastic sheet 24 is provided with a second blocking portion 21 correspondingly blocked with the first air intake holes 41, the first air intake holes 41 are preferably 4 and are arranged in a rectangular shape, so that the whole third check valve 28 is in a sheet-shaped symmetrical structure, the connection holes 23 on the central plate 22 can be installed and fixed on the first piston 34 by passing through screws, when the first air inlet hole 39 is used for air intake, the 4 second blocking parts 21 can be pushed open at the same time, after the air intake is finished, the second arc-shaped elastic sheet 24 has elasticity, the second blocking parts 21 automatically rebound to block the first air inlet hole 39, and the third one-way valve 28 adopts a special-shaped structure, so that the air intake requirement of the first compression cavity 32 can be met.

Similarly, as shown in fig. 12, the second check valve 20 is installed on the inner side wall of the second compression chamber 33 and is used for sealing the second air inlet hole 19 on the side wall of the second compression chamber 33, the second check valve 20 includes a fixing portion 17 connected with the side wall of the second compression chamber 33, a connecting hole 23 is formed in the fixing portion 17, a first arc-shaped elastic sheet 18 is arranged at one end of the fixing portion 17, a first sealing portion 16 for sealing the second air inlet hole 19 is arranged at one end of the first arc-shaped elastic sheet 18, and the first arc-shaped elastic sheet 18 is in a roll shape, so that the first sealing portion 16 has enough elasticity to seal the second air inlet hole 19.

In this embodiment, the shock absorbing bracket 1 comprises a bottom plate 65 and a plurality of side plates 63 arranged on the periphery of the bottom plate 65, a plurality of shock absorption connectors 61 are arranged at the top of the side plate 63 and the upper side of the bottom plate 65, the bottom plate 65 is also provided with a positioning contact pin 62 corresponding to the distribution valve assembly 9, the side plate 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, can play absorbing effect when shock absorber support 1 is installed with the vehicle main part, and the shock attenuation connector 61 on the bottom plate 65 can carry out the shock attenuation to motor 2, distribution valve assembly 9 and the compression pump body 4 and support simultaneously, and the noise abatement still is provided with radiator fan backup pad 64 on one side of bottom plate 65, can effectively firmly support radiator fan.

As a specific system composition of the distribution valve assembly 9, as shown in fig. 13:

the schematic diagram of the air supply unit system of the air suspension is shown in fig. 13, and the control valve 92 part of the whole system comprises air valves AV1, AV2, AV3 and AV4, switching valves SV1 and SV2, a pneumatic control valve ACV, a pressure limiting valve ASV, a flow valve FV and a tire inflation valve IV; a pipeline A1 is arranged between the primary air inlet 10 and the compression pump body 4, and an air filter AC is arranged on a pipeline A1; a pipeline A2 is arranged between the first check valve 13 and the primary exhaust check valve 15; a pipeline A3 is arranged between the secondary air inlet 48 and the air exhaust and heat radiation pipe 6; pipelines B1 and B2 are respectively arranged between the exhaust radiating pipe 6 and the drier 3 and between the exhaust radiating pipe and the pressure limiting valve ASV; a pipeline C1 is arranged between the dryer 3 and the pressure limiting valve ASV; a pipeline C2 is arranged between the pressure limiting valve ASV and the compression pump body 4; a pipeline D1 is arranged between the dryer 3 and the switching valve SV-2; a pipeline D2 is arranged between the switching valve SV2 and the air storage tank AT; a pipeline D3 is arranged between the switching valve SV1 and the first check valve 13; conduits F1-F4 are arranged between the dryer 3 and the air valves AV1, AV2, AV3 and AV 4. The various pipelines can be internal channels of the compression pump body 4 and the distribution valve assembly 9, and can also be external independent connecting pipes.

And (3) an inflation mode: when the vehicle speed is in a static or running state, the air suspension air supply unit is filled with the air storage tank AT. The system is firstly connected with an electromagnetic valve SV-2, then connected with a compressor and an air storage tank AT, air enters a compression pump body 4 from a primary air inlet 10, passes through an air exhaust and heat radiation pipe 6 through a pipeline A3, passes through a dryer 3 through a pipeline B1, passes through the electromagnetic valve SV-2 through a pipeline D1, and finally enters the air storage tank AT through a pipeline D2 to fill the air storage tank AT; when the pressure of the air storage tank AT is AT least higher than the pressure in the air spring to be regulated by a certain value, the motor does not operate, and the air spring is directly pressurized by the air storage tank AT.

Raising the vehicle body: the switching valve SV-2, the air valves AV1, AV2, AV3 and AV4 are powered on, compressed gas in the air storage tank AT is pressurized to the air springs through the switching valve SV-2 through a pipeline D2 and finally through air valves AV1, AV2, AV3 and AV4 through pipelines F1-F4, the vehicle body is lifted, and the air storage tank AT is preferentially used in the adjusting process during the periods of vehicle standstill and low-speed running so as to improve the acoustic system of the vehicle; when the pressure of the air storage tank AT is smaller than a certain value, the air storage tank AT is not switched on, and the motor operates: air valves AV1, AV2, AV3 and AV4 are electrified, air enters the compression pump body 4 from the primary air inlet 10, enters the exhaust radiating pipe 6 through the second one-way valve 20, the first one-way valve 13, the primary exhaust one-way valve 15, the secondary air inlet 48 and the pipelines A1, A2 and A3, passes through the pipeline B1 and the drier 3, and pressurizes the air springs through the pipeline D1, the pipelines F1-F4, the AV air valves AV1, AV2, AV3 and AV4, so that the vehicle body rises.

A quick start mode: when pressure is required to be quickly established, the air storage tank AT is switched on, and the motor operates: the switching valve SV-1 and the air valves AV1, AV2, AV3 and AV4 are electrified, compressed air in the air storage tank AT is guided into the second compression cavity 33 through the switching valve SV-1 and the pipeline A2 through the pipeline D2, then is guided into the exhaust radiating pipe 6 through the pipeline A3, then passes through the pipeline B1 and the drier 3 through the pipeline B1, and then is pressurized to the air spring through the pipeline D1 and the air valves AV 1-F4 and the air valves AV1, AV2, AV3 and AV4, so that the vehicle body is lifted. This mode allows for rapid build up of pressure when needed, this function being the tank AT pressure.

An air release mode: the pneumatic control valve ACV and air valves AV1, AV2, AV3 and AV4 are electrified, the air in the air spring passes through the air valves AV1, AV2, AV3 and AV4, passes through pipelines F1-F4, passes through a pipeline D1, passes through the dryer 3, passes through pipelines B1 and B2, passes through a flow valve FV and a pressure limiting valve ASV, and is finally discharged through a pipeline C2, and the vehicle body is lowered. The pressure of gas passes through pneumatic control valve ACV through pipelines D1, C1, and on the control interface of pressure-limiting valve, pressure-limiting valve ASV was switched to the open position, and the pressure-limiting valve sets for the safe pressure multistage adjustable, can effectively avoid the gas circuit to block up and lead to the pressure too high, and flow valve FV can realize multistage regulation in the exhaust stage, increases the driving sense. In addition, the invention is provided with the tire inflation valve IV, the tire inflation function is increased, the compressor is used for directly inflating the under-pressure tire, and the invention is convenient and practical.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims

1. An integrated air supply unit for an air suspension, comprising:

a shock-absorbing bracket (1);

the motor (2) is arranged on the damping support (1);

the compression pump body (4) is arranged at one end of the motor (2), and a main shaft of the motor (2) is inserted into the compression pump body (4);

the distribution valve assembly (9) is arranged on one side of the motor (2);

an operation inner cavity (31) and a first cavity (11) and a second cavity (12) which are respectively arranged at two sides of the operation inner cavity (31) are arranged in the compression pump body (4), a first compression cavity (32) and a second compression cavity (33) are respectively arranged at two ends of the operation inner cavity (31), 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), and the first piston (34) and the second piston (35) are driven by a main shaft of the motor (2) to move axially in the same direction;

the first compression cavity (32) and the second compression cavity (33) are communicated with the first cavity (11) through a first one-way valve (13) and a second one-way valve (20) respectively, the second cavity (12) is communicated with the second compression cavity (33), an exhaust port (46) communicated with the second cavity (12) is installed on the compression pump body (4), an exhaust and heat dissipation pipe (6) is connected to the exhaust port (46), and a secondary air inlet (48) communicated with the first cavity (11) is also installed on the compression pump body (4);

the exhaust radiating pipe (6) is connected with the distribution valve assembly (9) through a first connecting pipe (8), and the secondary air inlet (48) is connected with the distribution valve assembly (9) through a second connecting pipe (7).

2. The integrated air supply unit for an air suspension according to claim 1, wherein: the compression pump body (4) is provided with a spring exhaust inlet (49) communicated with the operation inner cavity (31), the end part of the motor (1) is provided with a primary air inlet (10), the spring exhaust inlet (49) is communicated with the primary air inlet (10), and the spring exhaust inlet (49) is also communicated with the distribution valve assembly (9) through a third connecting pipe (26).

3. The integrated air supply unit for an air suspension according to claim 1, wherein: shock attenuation support (1) on still install radiator fan (5), radiator fan (5) be close to the setting of compression pump body (4) and its wind stream that produces pass exhaust cooling tube (6).

4. The integrated air supply unit for an air suspension according to claim 1, wherein: one side of distribution valve assembly (9) install desicator (3), desicator (3) including desicator casing (50), desicator casing (50) separate for two at least drying chamber (57), the one end of desicator casing (50) be provided with drying chamber (57) confined sealed lid (53), one side of sealed lid (53) be provided with and stretch into compression spring (51) in drying chamber (57), compression spring (51) be used for pushing down the inside drier of drying chamber (57), the lateral wall of drying chamber (57) on be provided with drying hole (58) that are linked together with distribution valve assembly (9).

5. The integrated air supply unit for an air suspension according to claim 4, wherein: 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), wherein the distribution valve body (91) is connected with the dryer (3) in a clinging manner.

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

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

8. The integrated air supply unit for an air suspension according to claim 1, wherein: one end of the compression pump body (4) closes the first compression cavity (32) through the first end cover (45), and the other end of the compression pump body (4) closes the first cavity (11) and the second cavity (12) through the second end cover (41).

9. The integrated air supply unit for an air suspension according to claim 1, wherein: shock attenuation support (1) include bottom plate (65) and set up at bottom plate (65) peripheral a plurality of curb plate (63), the top of curb plate (63) and the upside of bottom plate (65) install a plurality of shock attenuation connector (61), bottom plate (65) on still be provided with location contact pin (62) that correspond with distribution valve assembly (9).

10. The air suspension supply air output device according to claim 1, wherein: one end of the exhaust radiating pipe (6) is connected with one end of a fixed hole seat (27) on the compression pump body (4) in an inserting mode, and the other end of the fixed hole seat (27) is provided with an air pipe connector for connecting a first connecting pipe (8).