Compressor of seat air suspension system

Abstract

The invention relates to the technical field of compressors, in particular to a seat air suspension system compressor which comprises a compressor shell, a motor assembly is arranged in the compressor shell, the output end of the motor assembly is connected with an eccentric block, the eccentric block is connected with a connecting rod, and the end of the connecting rod is connected with a PTFE packing cup. A compression cavity is further formed in the compressor shell, an anodic oxidation layer is arranged on the inner wall of the compression cavity, and the PTFE leather cup slides on the inner wall of the anodic oxidation layer. According to the air suspension compressor, through heat dissipation and noise technical improvement measures, the noise level of the air suspension compressor during working can be remarkably reduced, the heat dissipation capacity can be improved, the production cost can be effectively controlled, and the product is more attractive in the market; particularly, aiming at the solution of noise and heat dissipation problems, the comfort level of a driver and passengers is greatly improved, and the noise trouble is solved; in addition, through innovation of materials and technologies, lower energy consumption and longer product service life are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a seat air suspension system compressor. Background Art

[0002] The road conditions of construction machinery or large commercial vehicles are relatively complex. In order to ensure the driving safety and comfort of the driver, the cab is usually equipped with an air spring seat. When the air spring seat encounters bumpy roads, the air compressor's intake and exhaust action can ensure that the driver's sitting posture remains basically unchanged, and the air spring can effectively filter the low-frequency excitation of the road, which not only increases driving comfort, but also avoids driving safety problems caused by driver fatigue.

[0003] The compressors in the prior art have the following problems: high operating noise, with the sound pressure level at 0.5m reaching 70dB, which greatly affects ride comfort. The main reason is that the leather cup is made of hard EPDM material, which leads to high friction noise between the leather cup and the cylinder wall. In addition, the compressor generates high heat, has poor heat dissipation, and is prone to overheating protection. The reasons are as follows: the compression chamber has a small heat dissipation area; the copper sleeve embedded in the compression chamber rubs against the hard EPDM leather cup, generating a large amount of heat. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of high noise and high heat generation in the prior art, and to propose a seat air suspension system compressor.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A seat air suspension system compressor comprises a compressor housing, a motor assembly is arranged in the compressor housing, an eccentric block is connected to the output end of the motor assembly, the eccentric block is connected to a connecting rod, and a PTFE leather cup is connected to the end of the connecting rod;

[0007] A compression chamber is also arranged in the compressor shell, an inner wall of the compression chamber is provided with an anodized layer, and the PTFE leather cup slides on the inner wall of the anodized layer.

[0008] Preferably, the compressor housing is further provided with an air inlet and an air outlet, and two ends of the compression chamber are respectively connected to the air inlet and the air outlet.

[0009] Preferably, an exhaust valve assembly is provided at the connection between the air outlet and the compression chamber.

[0010] Preferably, the exhaust valve assembly comprises a valve seat, a reed valve is mounted on the valve seat, and a lift limiter is also mounted on the valve seat.

[0011] Preferably, the lift limiter comprises a sheet-like structure mounted on the inner wall of the valve seat, and a vent is provided on the sheet-like structure.

[0012] Preferably, an impedance composite silencing cavity is further provided between the air inlet and the compression cavity, and the impedance composite silencing cavity is communicated with the air inlet and the compression cavity.

[0013] Preferably, the PTFE leather cup is provided with a flow guide hole.

[0014] Preferably, the outer wall of the compressor housing is provided with heat dissipation fins, and the heat dissipation fins are located at the periphery of the compression chamber.

[0015] Preferably, the connecting rod and the eccentric block are connected via a bearing.

[0016] Preferably, the exhaust valve assembly further comprises an exhaust port seat, which abuts against the top of the lift limiter and is used for positioning the valve seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention solves the noise problem, and its solution is as follows: 1. The leather cup adopts soft modified PTFE material to replace the existing hard EPDM, so as to reduce the friction noise between the piston leather cup and the cylinder wall; 2. The bearing clearance is optimized to reduce the periodic mechanical impact noise caused by the rotational motion of the crank-connecting rod mechanism; 3. The intake system uses an impedance composite muffler to reduce the booming noise and high-frequency aerodynamic noise in the car caused by airflow pulsation.

[0019] The present invention solves the heat dissipation problem, and its solution is as follows: 1. Add heat dissipation fins on the outside of the compression chamber to increase the heat dissipation surface area and enhance the passive heat dissipation capacity under natural convection; 2. Remove the copper sleeve embedded in the compression chamber, and adopt aluminum material + anodizing solution to form a surface decomposition structure on the inner wall of the compression chamber, effectively reducing the friction coefficient between the leather cup and the cylinder wall, thereby reducing the heat generated by friction.

[0020] Based on the above improvements, the present invention also has the effect of reducing costs, as follows: 1. The traditional compression chamber leather cup uses a harder EPDM material, which is durable but will increase the working current, resulting in increased energy consumption and also generating additional heat. In contrast, the modified PTFE material is used as the compression chamber leather cup, which not only reduces the friction coefficient and friction noise, but also reduces energy loss; 2. Improve the exhaust valve assembly design, and reasonably design the valve spring stiffness and lift limiter height on the reed valve, which not only increases the compressor output flow, but also avoids excessive periodic load during the valve opening process, thereby extending its service life; 3. The copper sleeve embedded in the compression chamber is removed and replaced by anodizing treatment, which not only simplifies the production process and reduces costs, but also significantly reduces friction and further reduces power consumption.

[0021] Through the above technical improvement measures, the noise level of the air-suspended compressor during operation can be significantly reduced, the heat dissipation capacity can be improved, and the production cost can be effectively controlled, making the product more attractive in the market. In particular, the solutions for noise and heat dissipation problems will greatly improve the comfort of drivers and passengers and solve noise problems. In addition, through the innovation of materials and technologies, lower energy consumption and longer product life are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a seat air suspension system compressor proposed by the present invention;

[0023] Figure 2 A schematic diagram of the internal structure of a seat air suspension system compressor proposed by the present invention

[0024] Figure 3 This is a structural diagram of a middle connecting rod and a leather cup of a seat air suspension system compressor proposed by the present invention;

[0025] Figure 4 This is a structural diagram of a valve seat, a lift limiter and a reed valve in a seat air suspension system compressor proposed by the present invention;

[0026] Figure 5 This is a structural diagram of an exhaust valve assembly in a seat air suspension system compressor proposed by the present invention.

[0027] In the figure: 1. Motor assembly; 2. Impedance composite silencer cavity; 3. Air inlet; 4. Eccentric block; 5. Heat dissipation fins; 6. Compression chamber; 7. Air outlet; 8. PTFE leather cup; 9. Connecting rod; 10. Bearing; 11. Exhaust valve assembly; 12. Valve seat; 13. Lift limiter; 14. Reed valve. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-Figure 5 A seat air suspension system compressor includes a compressor housing, in which a motor assembly 1 is arranged, and the motor assembly 1 includes at least one of a brushless motor and a brushed motor.

[0030] A compression chamber 6 is also provided in the compressor casing, which is a cavity structure for gas compression; in addition, an air inlet 3 and an air outlet 7 are also provided in the compressor casing, and the two ends of the compression chamber 6 are respectively connected to the air inlet 3 and the air outlet 7, so that the air inlet 3 takes in air, and after the air passes through the compression chamber, it is compressed and discharged from the air outlet.

[0031] Furthermore, an exhaust valve assembly 11 is provided at the connection between the air outlet 7 and the compression chamber 6 to control the discharge of the airflow. Furthermore, in this embodiment, the exhaust valve assembly 11 includes a valve seat 12, on which a reed valve 14 is installed, wherein the reed valve 14 is a prior art, and when the reed valve 14 is working, the high-pressure airflow pushes the valve plate on the reed valve 14 open, and the reed valve 14 is in a conducting state. In this embodiment, the specific airflow enters from the compression chamber 6 and is discharged from the air outlet 7.

[0032] A lift limiter 13 is also mounted on the valve seat 12. Specifically, the lift limiter 13 is a sheet-like structure installed on the inner wall of the valve seat 12. The sheet-like structure limits the maximum movement trajectory of the valve plate on the reed valve 14, ensuring that the maximum opening height of the valve plate on the reed valve 14 is less than the safety threshold, ensuring that the air pressure discharged from the air outlet 7 meets the exhaust air pressure requirement, and also avoiding excessive periodic load during the opening of the valve plate of the reed valve 14, thereby extending its service life; an air vent is provided on the sheet-like structure, and the air vent is used to conduct the air flow passing through the reed valve 14 to the air outlet 7.

[0033] In some embodiments, the exhaust valve assembly 11 also includes an exhaust port seat, and the exhaust port 3 is composed of an exhaust pipe arranged on the exhaust port seat. The exhaust port seat and the exhaust pipe are interconnected, and the exhaust pipe is located directly above the reed valve 14. The exhaust port seat abuts against the top of the lift limiter 13 for positioning the valve seat 12.

[0034] It should be added that the compressor housing and the exhaust port seat are connected by threads. Specifically, a mounting groove corresponding to the exhaust port seat is provided on the compressor housing, an external thread is provided on the outer wall of the exhaust port seat, and an internal thread corresponding to the external thread is provided on the inner wall of the mounting groove. A sealing ring is also provided on the outer wall of the exhaust port seat for sealing with the mounting groove.

[0035] In some embodiments, an impedance composite silencer cavity 2 is further provided between the air inlet 3 and the compression chamber 6, in which an impedance composite silencer in the prior art is installed, and the impedance composite silencer cavity 2 is connected with the air inlet 3 and the compression chamber 6. The airflow entering from the air inlet 3 passes through the impedance composite silencer cavity 2 to achieve silencer, thereby reducing the booming noise and high-frequency aerodynamic noise in the vehicle caused by airflow pulsation.

[0036] The inner wall of the compression chamber 6 is provided with an anodized layer, and the PTFE leather cup 8 slides on the inner wall of the anodized layer. Compared with the copper sleeve embedded in the compression chamber in the prior art, the friction coefficient between the leather cup and the cylinder wall is effectively reduced, thereby reducing frictional heat and noise.

[0037] It should be added that: a guide hole is provided on the PTFE leather cup 8, and based on the setting of the guide hole, air flow is used to flow from the impedance composite silencer cavity 2 to the compression cavity 6.

[0038] The outer wall of the compressor shell is provided with heat dissipation fins 5, and the heat dissipation fins 5 are located at the periphery of the compression chamber 6. The heat dissipation fins 5 increase the heat dissipation area of ​​the outer wall of the compression chamber 6, thereby accelerating the heat dissipation effect of the compression chamber 6.

[0039] Based on the setting of the motor assembly 1, the output end of the motor assembly 1 is connected to the eccentric block 4, the eccentric block 4 is connected to the connecting rod 9, and the end of the connecting rod 9 is connected to the PTFE leather cup 8. Through the transmission of the eccentric block 4 and the connecting rod 9, the movement of the PTFE leather cup 8 in the compression chamber 6 is realized, thereby realizing the exhaust process.

[0040] In some embodiments, the connecting rod 9 and the eccentric mass 4 are connected via a bearing 10. The clearance fit of the bearing 10 can reduce the periodic mechanical impact noise caused by the rotational movement of the crank-connecting rod 9 mechanism.

[0041] The present invention can explain its functional principle through the following operation mode:

[0042] In the present invention, the motor assembly 1 drives the eccentric block 4 to perform periodic rotational motion, driving the connecting rod 9 to perform reciprocating motion along the anodized layer on the inner wall of the compression chamber 6, thereby generating negative pressure. The generated negative pressure first draws the external gas into the impedance composite silencer chamber 2 for silencer treatment. Then the gas enters the compression chamber 6 through the guide hole provided on the leather cup 8, and is compressed by the piston of the PTFE leather cup 8 to become high-pressure gas, thereby pushing the air spring in the reed valve 14, causing the valve plate of the reed valve 14 to contact the bottom of the lift limiter 13, thereby opening the reed valve 14, and the gas is discharged from the outlet 7.

[0043] Finally, in order to prevent the valve plate of the reed valve 14 from generating large bending stress during the opening process of the reed valve 14, a lift limiter 13 is used to ensure that the maximum opening height of the valve plate is less than the safety threshold. When the compression stroke is completed, the valve plate is closed in time to prevent the gas inside the air spring from flowing back to the compressor inlet.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A seat air suspension system compressor, comprising a compressor housing, It is characterized in that A motor assembly (1) is arranged in the compressor housing, an output end of the motor assembly (1) is connected to an eccentric block (4), the eccentric block (4) is connected to a connecting rod (9), and an end of the connecting rod (9) is connected to a PTFE leather cup (8); A compression chamber (6) is also provided in the compressor housing, an inner wall of the compression chamber (6) is provided with an anodized layer, and the PTFE leather cup (8) slides on the inner wall of the anodized layer.

2. A seat air suspension system compressor according to claim 1, It is characterized in that The compressor casing is also provided with an air inlet (3) and an air outlet (7), and two ends of the compression chamber (6) are respectively connected to the air inlet (3) and the air outlet (7).

3. A seat suspension system compressor according to claim 2, It is characterized in that An exhaust valve assembly (11) is provided at the connection between the air outlet (7) and the compression chamber (6).

4. A seat air suspension system compressor according to claim 3, It is characterized in that The exhaust valve assembly (11) comprises a valve seat (12), a reed valve (14) is mounted on the valve seat (12), and a lift limiter (13) is also mounted on the valve seat (12).

5. A seat suspension system compressor according to claim 4, It is characterized in that The lift limiter (13) is a sheet-like structure installed on the inner wall of the valve seat (12), and a vent is provided on the sheet-like structure.

6. A seat suspension system compressor according to claim 2, It is characterized in that An impedance composite silencing cavity (2) is also provided between the air inlet (3) and the compression cavity (6), and the impedance composite silencing cavity (2) is in communication with the air inlet (3) and the compression cavity (6).

7. The seat air suspension system compressor according to claim 1, It is characterized in that The PTFE leather cup (8) is provided with a flow guide hole.

8. The seat suspension system compressor according to claim 1, It is characterized in that The outer wall of the compressor shell is provided with heat dissipation fins (5), and the heat dissipation fins (5) are located on the periphery of the compression chamber (6).

9. The seat air suspension system compressor according to claim 1, It is characterized in that The connecting rod (9) and the eccentric block (4) are connected via a bearing (10).

10. A seat air suspension system compressor according to claim 4, It is characterized in that The exhaust valve assembly (11) further comprises an exhaust port seat, which abuts against the top of the lift limiter (13) and is used to position the valve seat (12).

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