Air compressor for open air suspension

Abstract

The application discloses an open air suspension air compressor, which comprises a motor module, the motor module comprises a motor shell and a rotor, the motor shell is connected with an air inlet pipe, the rotor is fixedly connected with a crankshaft part, the outer side of the crankshaft part is provided with a crankshaft support shell fixedly connected with the motor shell, the crankshaft support shell is communicated with the motor shell, the motor shell is fixedly installed with a piston cylinder body, the piston cylinder body is provided with a primary compression cavity and a secondary compression cavity, a connecting air channel is arranged between the primary compression cavity and the secondary compression cavity, the connecting air channel is integrally formed with the piston cylinder body, the piston cylinder body is fixedly connected with a dry outer shell body at the output end, an exhaust pipe is arranged at the output end of the dry outer shell body, the exhaust pipe is connected with an air suspension, and the application further comprises a control valve group connected with the exhaust pipe and the dry outer shell body and comprising a pressure relief pipe. The application reduces the external pipeline arranged between different components through structural design, reduces the pipeline interface and the number of sealing elements, and further reduces the possibility of sealing failure.

Description

Technical Field

[0001] This application belongs to the technical field of air compressors, and relates to an air compressor for an open air suspension system. Background Technology

[0002] Air suspension is a vehicle suspension system that uses an air compressor to supply air to the air suspension airbags or stores pressure in a high-pressure air tank, thereby raising and lowering the vehicle body. However, current air compressors require numerous connecting air lines during operation, and the seals at the connections between the pipes and the cylinder are prone to failure. Additionally, humid air carrying moisture can corrode the air suspension and other structural components. Utility Model Content

[0003] To address the aforementioned problems, this application proposes an air compressor for open air suspension, which effectively solves the problems in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] An air compressor for an open-type air suspension system, comprising:

[0006] The motor module includes a motor housing and a rotor;

[0007] An air intake pipe, which is connected to the housing;

[0008] A crankshaft assembly is fixedly connected to the rotor, and a crankshaft support shell is fixedly connected to the motor housing on the outer side of the crankshaft assembly, and the crankshaft support shell is in communication with the motor housing;

[0009] A piston cylinder body is fixedly installed on the motor housing. The piston cylinder body is provided with a primary compression chamber and a secondary compression chamber. The piston cylinder body is connected to the crankshaft support shell.

[0010] A primary piston and a secondary piston are provided, each of which is slidably mounted in the primary compression chamber and the secondary compression chamber, respectively. The secondary piston is rotatably connected to the output end of the crankshaft component, and the primary piston is rotatably connected to the secondary piston.

[0011] A connecting air passage is provided, with its two ends connected to the primary compression chamber and the secondary compression chamber, respectively. The connecting air passage and the piston cylinder are integrally formed.

[0012] A drying outer shell is fixedly connected to the output end of the piston cylinder. A drying inner shell is provided inside the drying outer shell, and a desiccant is provided on the side wall of the drying inner shell.

[0013] An exhaust pipe is installed at the output end of the dryer housing and is connected to the air suspension.

[0014] A control valve assembly, which is connected to the exhaust pipe and the drying housing, includes a pressure relief pipe.

[0015] Optionally, the control valve assembly includes a valve assembly housing fixedly connected to the drying outer shell. The valve assembly housing has a large-diameter cavity and a small-diameter cavity coaxially arranged. A first valve core is slidably installed in the large-diameter cavity, and a second valve core is slidably installed in the small-diameter cavity. The first and second valve cores are fixedly connected. The small-diameter cavity communicates with the drying outer shell, and the large-diameter cavity communicates with the exhaust pipe. A solenoid valve is provided between the large-diameter cavity and the exhaust pipe. A pressure relief pipe is connected to the small-diameter cavity. A return spring is provided between the first valve core and the valve assembly housing.

[0016] Optionally, the pressure relief pipe is connected to the piston cylinder.

[0017] Optionally, the pressure relief pipe, valve assembly housing, and exhaust pipe are integrally formed.

[0018] Optionally, a throttling orifice is provided in the middle of the intake pipe.

[0019] Optionally, the rotor includes a shaft integrally formed with a crankshaft.

[0020] Optionally, both the primary piston and the secondary piston include a connecting rod and a compression end fixedly mounted on the connecting rod. The connecting rod of the secondary piston is rotatably connected to the crankshaft, and the connecting rod of the primary piston is rotatably connected to the connecting rod of the secondary piston.

[0021] Optionally, the drying inner shell is made of PA material, and the desiccant is activated alumina.

[0022] Optionally, the valve assembly housing and the drying housing are integrally formed.

[0023] Compared with the prior art, this application has the following beneficial effects:

[0024] 1. By forming a flow passage through the motor housing, crankshaft support housing, piston cylinder, connecting air passage and drying housing, the number of external pipes between different components is reduced, thereby reducing the number of pipe interfaces and sealing components, and thus reducing the possibility of seal failure.

[0025] 2. The intake air enters the primary compression chamber through the motor housing. The motor module generates heat during operation, which heats the air. Together with the desiccant, the air is dried. The circulating air carries away the heat from the motor module, improving the heat dissipation effect.

[0026] 3. By setting a pressure relief pipe connected to the piston cylinder, the gas can flow back into the piston cylinder during pressure relief, and then enter the intake pipe for discharge after passing through the motor housing. During the pressure relief process, the heat of the motor module is carried away, thereby improving the heat dissipation efficiency of the motor module. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the piston cylinder portion according to an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the internal structure of an embodiment of this application.

[0030] Reference numerals: 1. Motor module; 11. Motor housing; 12. Rotor; 121. Shaft; 21. Intake pipe; 22. Exhaust pipe; 23. Pressure relief pipe; 31. Crankshaft component; 32. Crankshaft support housing; 41. Piston cylinder; 411. First-stage compression chamber; 412. Second-stage compression chamber; 42. First-stage piston; 43. Second-stage piston; 431. Connecting rod; 432. Compression end; 44. Connecting air passage; 51. Dryer outer housing; 52. Dryer inner housing; 6. Control valve assembly; 61. Valve assembly housing; 62. Large-diameter chamber; 63. Small-diameter chamber; 64. First valve core; 65. Second valve core; 66. Solenoid valve; 67. Return spring. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figures 1 to 3This application discloses an air compressor for an open-type air suspension, comprising a motor module 1. The motor module 1 includes a motor housing 11 and a rotor 12. The motor housing 11 is connected to an intake pipe 21. The rotor 12 is fixedly connected to a crankshaft component 31. A crankshaft support shell 32 is fixedly connected to the motor housing 11 on the outside of the crankshaft component 31 and communicates with the motor housing 11. A piston cylinder 41 is fixedly installed on the motor housing 11. A primary compression chamber 411 and a secondary compression chamber 412 are provided inside the piston cylinder 41. The piston cylinder 41 communicates with the crankshaft support shell 32. The primary compression chamber 411 and the secondary compression chamber 412 are slidably installed in their respective chambers. There are a primary piston 42 and a secondary piston 43, both of which are rotatably connected to the output end of the crankshaft 31. A connecting air passage 44 is provided between the primary compression chamber 411 and the secondary compression chamber 412. The connecting air passage 44 is integrally formed with the piston cylinder 41. A drying outer shell 51 is fixedly connected to the output end of the piston cylinder 41. A drying inner shell 52 is provided inside the drying outer shell 51. A desiccant is provided on the side wall of the drying inner shell 52. An exhaust pipe 22 is provided at the output end of the drying outer shell 51. The exhaust pipe 22 is connected to the air suspension. It also includes a control valve group 6, which is connected to the exhaust pipe 22 and the drying outer shell 51, and includes a pressure relief pipe 23.

[0033] Specifically, a flow passage is formed by the motor housing 11, crankshaft support housing 32, piston cylinder 41, connecting air passage 44, and drying housing 51, reducing the number of external pipes between different components, thereby reducing the number of pipe interfaces and seals, and thus reducing the possibility of seal failure. Simultaneously, the intake air enters the primary compression chamber 411 through the motor housing 11. The motor module 1 generates heat during operation, heating the air, which, together with the desiccant, dries the air. The flowing air carries away the heat from the motor module 1, improving heat dissipation.

[0034] In some feasible methods, the motor housing 11 is a cylindrical housing, and the first end of the motor housing 11 is provided with a cover plate with bolt sealing connection. The air intake pipe 21 is installed on the cover plate, and the rotor 12 is rotatably installed in the middle of the cover plate. The motor housing 11 is a closed housing with rust prevention treatment on the inside to reduce water vapor corrosion. The motor module 1 is also provided with a stator, bearings, carbon brushes, magnets, etc., which are all existing technologies and will not be described in detail here.

[0035] The crankshaft support housing 32 is a stepped rotating body. The crankshaft support housing 32 has a through hole to allow gas to enter the piston cylinder 41. The crankshaft component 31 is rotatably installed inside the crankshaft support housing 32. The crankshaft support housing 32 provides support for the crankshaft component 31 at the end away from the rotor 12. For balanced rotation, a fan-shaped balance block is provided on the crankshaft component 31. The crankshaft component 31 is fixedly connected to the rotor 12 and rotates with the rotor 12.

[0036] The piston cylinder body 41 is an irregularly shaped shell. An inner chamber is provided within the piston cylinder body 41, which is divided into a primary compression chamber 411 and a secondary compression chamber 412. The portion between the primary and secondary compression chambers 411 and 412 is the cylinder cavity. The crankshaft support shell 32 connects to the cylinder cavity. An inlet port equipped with a one-way valve is provided on the primary piston 42, allowing gas to enter the primary compression chamber 411 from the cylinder cavity. An integrally formed tubular block is provided on the outer side of the piston cylinder body 41. A through hole is provided inside the tubular block to connect the primary compression chamber 411 and the secondary compression chamber 412, i.e., a connecting air passage 44. A one-way valve is provided in the connecting air passage 44. The secondary compression chamber 412 is a blind end, with radially arranged air holes connecting to the drying inner shell 52. One-way valves are also provided in these air holes. A protruding ring is provided at one end of the piston cylinder 41 near the motor housing 11. The ring is sealed and inserted into the motor housing 11. The cover plate of the motor housing 11 is fixedly connected to the piston cylinder 41 by bolts. The crankshaft support shell 32 is located inside the ring. The primary compression chamber 411 penetrates the piston cylinder 41 to form a mounting hole, and a through hole is provided on the side of the piston cylinder 41 away from the motor housing 11 to facilitate the installation of the primary piston 42 and the secondary piston 43. The mounting hole and the through hole are sealed by a cover.

[0037] Both the outer drying shell 51 and the inner drying shell 52 are cylindrical. The inner drying shell 52 is provided with perforated plates at both ends, and desiccant is filled between the two perforated plates. The inner drying shell 52 is made of PA material, and the desiccant is activated alumina. The outer drying shell 51 is bolted to the piston cylinder 41. The control valve group 6 is used to control the exhaust and pressure relief.

[0038] During operation, air enters the motor housing 11 through the intake pipe 21, then enters the crankshaft support housing 32 through the gap between the rotor 12 and the stator, carrying away the heat from the motor module 1. Hot air enters the piston cylinder 41 from the crankshaft support housing 32. After the first-stage piston 42 moves upward, the hot air enters the first-stage compression chamber 411. Driven by the crankshaft component 31, the first-stage piston 42 compresses the air. The compressed gas then enters the second-stage compression chamber 412 through the connecting air passage 44 for further compression. Subsequently, the gas enters the drying inner housing 52 for drying, and finally enters the air suspension.

[0039] As one specific embodiment of the open-type air compressor for air suspension provided in the application, please refer to Figure 3The control valve assembly 6 includes a valve assembly housing 61 fixedly connected to the drying outer shell 51. The valve assembly housing 61 has a large-diameter cavity 62 and a small-diameter cavity 63 coaxially arranged. A first valve core 64 is slidably installed in the large-diameter cavity 62, and a second valve core 65 is slidably installed in the small-diameter cavity 63. The first valve core 64 and the second valve core 65 are fixedly connected. The small-diameter cavity 63 is connected to the drying outer shell 51, and the large-diameter cavity 62 is connected to the exhaust pipe 22. A solenoid valve 66 is provided between the large-diameter cavity 62 and the exhaust pipe 22. A pressure relief pipe 23 is connected to the small-diameter cavity 63. A return spring 67 is provided between the first valve core 64 and the valve assembly housing 61.

[0040] Overall, when the air suspension needs to release pressure, the high-pressure gas returns to the exhaust pipe 22 and enters the dryer inner housing 52 to backwash the desiccant. Simultaneously, high-pressure air enters the large-diameter cavity 62, pushing the first valve core 64 to compress the return spring 67, causing the second valve core 65 to slide, thus connecting the pressure relief pipe 23 to the dryer outer housing 51. The high-pressure gas then enters the dryer outer housing 51 from the end of the dryer inner housing 52 away from the control valve assembly 6, and is subsequently discharged from the pressure relief pipe 23.

[0041] By designing the valve assembly housing 61, the desiccant is flushed in the reverse direction while being depressurized, removing some moisture and extending the desiccant's lifespan. Simultaneously, the small-diameter cavity 63 connects to the drying outer shell 51. If the pressure becomes too high during pressurization, the gas pushes the second valve core 65 to release pressure, thus functioning as both a safety valve and a pressure relief valve.

[0042] Furthermore, the pressure relief pipe 23 is connected to the piston cylinder 41.

[0043] Furthermore, the drying outer shell 51, the pressure relief pipe 23, the valve assembly shell 61, and the exhaust pipe 22 are integrally formed.

[0044] It should be understood that by using a one-piece molded structure, the use of seals is reduced, sealing performance is improved, and the risk of seal failure is reduced.

[0045] In some feasible embodiments, the valve assembly housing 61 includes two cylindrical cavities, one for the exhaust pipe 22 and the other for the mounting hole. The end of the mounting hole furthest from the dryer housing 51 is a large-diameter cavity 62, and the other end has a small-diameter through hole, forming a small-diameter cavity 63. The small-diameter cavity 63 has a radially extending through hole for pressure relief. A through hole on the side of the dryer housing 51 communicates with the radial through hole of the small-diameter cavity 63. The piston cylinder 41 has a through hole. When the piston cylinder 41 is connected to the dryer housing 51, the through hole on the piston cylinder 41 aligns with the through hole in the dryer housing 51, and the through hole in the piston cylinder 41 communicates with the interior of the piston cylinder 41. A cover is bolted to the end of the valve assembly housing 61 furthest from the dryer housing 51. A return spring 67 is installed on the end of the first valve core 64 furthest from the second valve core 65, and the return spring 67 abuts against the cover.

[0046] An integrally formed mounting cylinder is fixedly installed on the side wall of the valve assembly housing 61. The mounting cylinder is connected to the large-diameter cavity 62 and the exhaust pipe 22 respectively. The solenoid valve 66 is installed in the mounting cylinder. The solenoid valve 66 is a commonly used on / off valve that controls the connection between the large-diameter cavity 62 and the exhaust pipe 22.

[0047] As another specific embodiment of the open-type air compressor for air suspension provided in the application, please refer to [link / reference needed]. Figure 2 and Figure 3 The rotor 12 includes a rotating shaft 121, which is integrally formed with the crankshaft component 31.

[0048] It should be understood that by setting the integrally molded rotating shaft 121 and crankshaft 31, the number of connecting parts is reduced, making installation easier.

[0049] As another specific embodiment of the air compressor for an open air suspension provided in the application, both the first-stage piston 42 and the second-stage piston 43 include a connecting rod 431 and a compression end 432 fixedly installed on the connecting rod 431. The connecting rod 431 of the second-stage piston 43 is rotatably connected to the crankshaft 31, and the connecting rod 431 of the first-stage piston 42 is rotatably connected to the connecting rod 431 of the second-stage piston 43.

[0050] It should be understood that the connecting rod 431 of the first-stage piston 42 and the second-stage piston 43 is integrated with the compression end 432, reducing the connection structure and improving service life.

[0051] In some feasible embodiments, a polytetrafluoroethylene (PTFE) sealing ring is provided on the outer side of the compression end 432 of the secondary piston 43. When the crankshaft component 31 drives the secondary piston 43 to rotate, the secondary piston 43 squeezes the sealing ring to form an oscillation, so as to adapt to the rotation of the crankshaft component 31. A cavity is provided in the middle of the connecting rod 431 of the primary piston 42. The connecting rod 431 of the secondary piston 43 is inserted into the cavity and rotatably connected to the primary piston 42. Through holes are provided on both sides of the cavity, and the crankshaft component 31 passes through the through holes and rotatably connects to the secondary piston 43.

[0052] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An air compressor for an open-type air suspension, characterized in that, include: Motor module (1), the motor module (1) includes a motor housing (11) and a rotor (12); Air intake pipe (21), which is connected to the housing (11); A crankshaft component (31) is fixedly connected to the rotor (12). A crankshaft support shell (32) is fixedly connected to the motor housing (11) on the outside of the crankshaft component (31). The crankshaft support shell (32) is connected to the motor housing (11). Piston cylinder (41), the piston cylinder (41) is fixedly installed on the motor housing (11), the piston cylinder (41) is provided with a primary compression chamber (411) and a secondary compression chamber (412), and the piston cylinder (41) is connected to the crankshaft support shell (32). A first-stage piston (42) and a second-stage piston (43) are slidably mounted in the first-stage compression chamber (411) and the second-stage compression chamber (412), respectively. The second-stage piston (43) is rotatably connected to the output end of the crankshaft component (31), and the first-stage piston (42) is rotatably connected to the second-stage piston (43). A connecting air passage (44) is provided, the two ends of which are connected to the primary compression chamber (411) and the secondary compression chamber (412) respectively. The connecting air passage (44) and the piston cylinder (41) are integrally formed. A drying outer shell (51) is fixedly connected to the output end of the piston cylinder (41). A drying inner shell (52) is provided inside the drying outer shell (51), and a desiccant is provided on the side wall of the drying inner shell (52). Exhaust pipe (22), the exhaust pipe (22) is installed at the output end of the dryer housing (51), and the exhaust pipe (22) is connected to the air suspension; A control valve assembly (6) is connected to the exhaust pipe (22) and the drying housing (51), and the control valve assembly (6) includes a pressure relief pipe (23).

2. The air compressor for an open air suspension according to claim 1, characterized in that: The control valve assembly (6) includes a valve assembly housing (61) fixedly connected to the drying outer shell (51). The valve assembly housing (61) is provided with a large-diameter cavity (62) and a small-diameter cavity (63) arranged coaxially. A first valve core (64) is slidably installed in the large-diameter cavity (62), and a second valve core (65) is slidably installed in the small-diameter cavity (63). The first valve core (64) and the second valve core (65) are fixedly connected. The small-diameter cavity (63) is connected to the drying outer shell (51), and the large-diameter cavity (62) is connected to the exhaust pipe (22). A solenoid valve (66) is provided between the large-diameter cavity (62) and the exhaust pipe (22). The pressure relief pipe (23) is connected to the small-diameter cavity (63). A return spring (67) is provided between the first valve core (64) and the valve assembly housing (61).

3. The air compressor for an open air suspension according to claim 2, characterized in that: The pressure relief pipe (23) is connected to the piston cylinder (41).

4. The air compressor for an open air suspension according to claim 3, characterized in that: The pressure relief pipe (23), valve assembly housing (61), and exhaust pipe (22) are integrally formed.

5. An air compressor for an open air suspension according to claim 1, characterized in that: A throttling orifice is provided in the middle of the air intake pipe (21).

6. The air compressor for an open air suspension according to claim 1, characterized in that: The rotor (12) includes a rotating shaft (121), which is integrally formed with the crankshaft (31).

7. The air compressor for an open air suspension according to claim 1, characterized in that: Both the first-stage piston (42) and the second-stage piston (43) include a connecting rod (431) and a compression end (432) fixedly installed on the connecting rod (431). The connecting rod (431) of the second-stage piston (43) is rotatably connected to the crankshaft (31), and the connecting rod (431) of the first-stage piston (42) is rotatably connected to the connecting rod (431) of the second-stage piston (43).

8. The air compressor for an open air suspension according to claim 1, characterized in that: The drying inner shell (52) is made of PA material, and the desiccant is activated alumina.

9. An air compressor for an open air suspension according to claim 4, characterized in that: The valve assembly housing (61) and the drying housing (51) are integrally formed.

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