Compressor of seat air suspension system

Abstract

The utility model 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 technical improvement measures of heat dissipation and noise, the noise level of the air suspension compressor in the working process can be remarkably reduced, the heat dissipation capacity is improved, the production cost is effectively controlled, and products are 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] This utility model relates to the field of compressor technology, and in particular to a compressor for a seat suspension system. Background Technology

[0002] Construction machinery or large commercial vehicles often travel on complex road conditions. To ensure driver safety and comfort, air spring seats are typically installed in the cab. When encountering bumpy roads, the air spring seat uses the intake and exhaust of the air compressor to keep the driver's posture relatively unchanged. The air springs also effectively filter low-frequency road vibrations, increasing ride comfort and preventing driver fatigue that could lead to safety issues.

[0003] Existing compressors have the following problems: high operating noise, with a sound pressure level reaching 70dB at 0.5m, severely affecting driving comfort. The main reason is that the piston cups are made of hard EPDM material, resulting in high friction noise between the piston cups and the cylinder walls. In addition, the compressor generates a lot of heat, has poor heat dissipation, and is prone to overheating protection. The reasons are as follows: small heat dissipation area of ​​the compression chamber; friction between the copper sleeve embedded in the compression chamber and the hard EPDM piston cups generates a large amount of heat. Utility Model Content

[0004] The purpose of this invention is to solve the problems of high noise and high heat generation in the existing technology, and to propose a compressor for a seat suspension system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A seat air suspension system compressor includes a compressor housing, a motor assembly is disposed inside the compressor housing, an eccentric block is connected to the output end of the motor assembly, a connecting rod is connected to the eccentric block, and a PTFE cup is connected to the end of the connecting rod.

[0007] The compressor housing is further provided with a compression chamber, the inner wall of which is provided with an anodized layer, and the PTFE 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 the 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 includes a valve seat, on which a reed valve is mounted, and a lift limiter is also mounted on the valve seat.

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

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

[0013] Preferably, the PTFE 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 on the periphery of the compression cavity.

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

[0016] Preferably, the exhaust valve assembly further includes an exhaust port seat that abuts against the top of the lift limiter for positioning the valve seat.

[0017] Compared with the prior art, the advantages of this utility model are as follows:

[0018] To address the noise problem, this utility model offers the following solutions: 1. The piston cup is replaced with a soft modified PTFE material to reduce friction noise between the piston cup and the cylinder wall; 2. The bearing clearance is optimized to reduce periodic mechanical impact noise caused by the rotation of the crankshaft and connecting rod mechanism; 3. An impedance composite muffler is used in the intake system to reduce booming noise and high-frequency aerodynamic noise caused by airflow pulsation inside the vehicle.

[0019] To solve the heat dissipation problem, the present invention provides the following solutions: 1. Add heat dissipation fins to 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 use aluminum material + anodizing to form a surface decomposition structure on the inner wall of the compression chamber, effectively reducing the friction coefficient between the piston cup and the cylinder wall, thereby reducing the heat generated by friction.

[0020] Based on the above improvements, this utility model also has the effect of reducing costs, specifically as follows: 1. Traditional compression chamber cups use relatively hard EPDM material, which, although durable, increases the operating current, leading to increased energy consumption and additional heat generation. In contrast, using modified PTFE material as the compression chamber cup not only reduces the coefficient of friction and friction noise but also reduces energy loss; 2. The exhaust valve assembly design is improved, and the valve plate spring stiffness and lift limiter height on the reed valve are rationally designed, which increases the compressor output flow and avoids excessive cyclic load during valve plate opening, thus extending its service life; 3. The copper sleeve embedded in the compression chamber is removed and replaced with anodized treatment, which not only simplifies the production process and reduces costs but also significantly reduces friction, further reducing power consumption.

[0021] Through the aforementioned technological improvements, the noise level of the air suspension compressor during operation can be significantly reduced, heat dissipation capacity improved, and production costs effectively controlled, making the product more attractive in the market. In particular, the solutions addressing noise and heat dissipation issues will greatly enhance passenger comfort and resolve noise concerns. Furthermore, innovations in materials and technology have resulted in lower energy consumption and a longer product lifespan. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a compressor for a seat suspension system proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of a compressor for a seat suspension system proposed in this utility model.

[0024] Figure 3 This is a structural diagram of the connecting rod and the cup of the compressor of the seat air suspension system proposed in this utility model;

[0025] Figure 4 This is a structural diagram of the valve seat, lift limiter, and reed valve in the compressor of the seat suspension system proposed in this utility model;

[0026] Figure 5 This is a structural diagram of the exhaust valve assembly in the compressor of a seat suspension system proposed in this utility model.

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

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Reference Figures 1-5 A seat air suspension system compressor includes a compressor housing, and a motor assembly 1 is disposed inside the compressor housing. The motor assembly 1 includes at least one of a brushless motor and a brushed motor.

[0030] The compressor housing is also provided with a compression chamber 6, which is a gas compression chamber structure; in addition, the compressor housing is also provided with an air inlet 3 and an air outlet 7, and the two ends of the compression chamber 6 are respectively connected to the air inlet 3 and the air outlet 7. Then, the air inlet 3 is filled with 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 airflow discharge. Further, in this embodiment, the exhaust valve assembly 11 includes a valve seat 12, on which a reed valve 14 is installed. The reed valve 14 is existing technology; when the reed valve 14 is working, the high-pressure airflow pushes open the valve plate on the reed valve 14, and the reed valve 14 is in a conducting state. In this embodiment, the specific airflow enters from the compression chamber 6 and exits 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 plate-like structure installed on the inner wall of the valve seat 12. This plate-like structure limits the maximum movement trajectory of the valve plate on the reed valve 14, ensuring that the limit 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 outlet 7 meets the discharge air pressure requirements, and also preventing the cyclic load on the valve plate of the reed valve 14 from being too large during the opening process, thus extending its service life. A vent is provided on the plate-like structure, which is used to guide the airflow passing through the reed valve 14 to the outlet 7.

[0033] In some embodiments, the exhaust valve assembly 11 also includes an exhaust port seat, the exhaust port 3 is composed of an exhaust pipe disposed 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, the compressor housing has a mounting groove corresponding to the exhaust port seat, the outer wall of the exhaust port seat has external threads, and the inner wall of the mounting groove has internal threads corresponding to the external threads. The outer wall of the exhaust port seat is also provided with a sealing ring for sealing with the mounting groove.

[0035] In some embodiments, an impedance composite silencing cavity 2 is also provided between the air inlet 3 and the compression chamber 6. The cavity is equipped with an impedance composite silencer of the prior art, and the impedance composite silencing cavity 2 is connected to the air inlet 3 and the compression chamber 6. The airflow entering from the air inlet 3 passes through the impedance composite silencing cavity 2 to achieve noise reduction, 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 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, it effectively reduces the friction coefficient between the cup and the cylinder wall, thereby reducing frictional heat and noise.

[0037] It should be added that: the PTFE cup 8 is provided with a flow guide hole, which is designed to allow airflow to flow from the impedance composite silencing cavity 2 to the compression cavity 6.

[0038] The compressor housing has heat dissipation fins 5 on its outer wall, and the heat dissipation fins 5 are located around 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 configuration of the motor assembly 1, the 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 the end of the connecting rod 9 is connected to a PTFE cup 8. Through the transmission of the eccentric block 4 and the connecting rod 9, the PTFE cup 8 moves in the compression chamber 6, realizing the exhaust process.

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

[0041] The functional principle of this utility model can be explained through the following operation methods:

[0042] In this invention, the motor assembly 1 drives the eccentric block 4 to perform periodic rotation, which in turn drives the connecting rod 9 to reciprocate along the anodized layer on the inner wall of the compression chamber 6, generating negative pressure. This negative pressure first draws external gas into the impedance composite silencing chamber 2 for noise reduction. Then, the gas enters the compression chamber 6 through a guide hole on the PTFE cup 8, and is compressed by the piston of the PTFE cup 8, becoming high-pressure gas. This pressure pushes the air spring inside 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 allowing the gas to exit from the outlet 7.

[0043] Finally, to prevent excessive bending stress on the valve plate of the reed valve 14 during the opening process, a lift limiter 13 is used to ensure that the maximum opening height of the valve plate is less than the safety threshold. After the compression stroke ends, the valve plate closes promptly to prevent gas inside the air spring from flowing back to the compressor inlet.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A seat suspension system compressor comprising a compressor housing, characterized by, The compressor housing is provided with a motor assembly (1), the output end of the motor assembly (1) is connected with an eccentric block (4), the eccentric block (4) is connected with a connecting rod (9), the end of the connecting rod (9) is connected with a PTFE leather bowl (8). The compressor housing is also provided with a compression cavity (6), the inner wall of the compression cavity (6) is provided with an anodization layer, and the PTFE leather bowl (8) slides in the inner wall of the anodization layer.

2. A seat suspension system compressor as defined in claim 1, wherein, The compressor housing is also provided with an air inlet (3) and an air outlet (7), and the two ends of the compression cavity (6) are respectively communicated with the air inlet (3) and the air outlet (7).

3. A seat suspension system compressor as defined in claim 2, wherein, The air outlet (7) is provided with an exhaust valve assembly (11) at the connection with the compression cavity (6).

4. A seat suspension system compressor as defined in claim 3, wherein, The exhaust valve assembly (11) includes a valve seat (12), a reed valve (14) is installed on the valve seat (12), and a lift limiter (13) is also arranged on the valve seat (12).

5. A seat suspension system compressor as defined in claim 4, wherein, The lift limiter (13) is a sheet structure installed on the inner wall of the valve seat (12), and the sheet structure is provided with a vent.

6. A seat suspension system compressor as defined in claim 2, wherein, The air inlet (3) and the compression cavity (6) are also provided with an impedance composite muffling cavity (2), and the impedance composite muffling cavity (2) is communicated with the air inlet (3) and the compression cavity (6).

7. A seat suspension system compressor as defined in claim 1, wherein, The PTFE leather bowl (8) is provided with a flow guide hole.

8. A seat suspension system compressor as defined in claim 1, wherein, The outer wall of the compressor housing is provided with a heat dissipation fin (5), and the heat dissipation fin (5) is located at the periphery of the compression cavity (6).

9. A seat suspension system compressor as defined in claim 1, wherein, The connecting rod (9) and the eccentric block (4) are connected through a bearing (10).

10. A seat suspension system compressor as defined in claim 4, wherein, The exhaust valve assembly (11) also includes an exhaust port seat, which abuts against the top of the lift limiter (13) to position the valve seat (12).

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