Vehicle-mounted waterproof direct-current air compressor

Abstract

The utility model provides a kind of vehicle-mounted waterproof direct current air compressor, belong to air compressor technical field.It solves the problem that existing air compressor is vulnerable to rain, humid air and other external environment intrusion etc..The vehicle-mounted waterproof direct current air compressor includes direct current motor, and the both ends of direct current motor are fixedly connected with box body, and the outer end of box body is fixedly connected with side end cover, and side end cover includes block and seal part, and first sealing element is arranged between seal part and the mounting hole of box body;Box body is equipped with step hole, and the motor shell of direct current motor is equipped with step part, and second sealing element is arranged between step part and step hole;The upper end of box body is fixedly connected with valve plate and air inlet seat, and third sealing element is arranged between valve plate and box body, and fourth sealing element is arranged between valve plate and air inlet seat;Block, motor shell and air inlet seat are respectively provided with heat dissipation strip.The utility model has the advantages of waterproof, moisture-proof and dustproof, effectively prolongs the service life of motor and complete machine, and the advantages such as heat dissipation and sealing performance balance.

Description

Technical Field

[0001] This utility model belongs to the field of air compressor technology, specifically referring to a vehicle-mounted waterproof DC air compressor. Background Technology

[0002] DC air compressors, as portable air source devices, can operate directly using DC power from vehicles, ships, or energy storage batteries. They are widely used in areas such as car tire inflation, outdoor emergency rescue, and mobile tool operations. Their compact structure, portability, and flexibility make them an indispensable piece of equipment for outdoor operations and emergency response.

[0003] Currently, various air compressor structural designs exist in related technologies. For example, Chinese patent CN120557139A proposes an air compressor head that has achieved some progress in reducing overall size and noise through methods such as built-in mufflers and optimized cylinder structure and end cover layout. However, in practical applications such as automotive repair and field operations, these air compressors are often placed in open or semi-open environments. Their side end covers typically employ a perforated structure to facilitate motor heat dissipation, but this also makes the motor's interior susceptible to intrusion from rainwater, humid air, and other external environmental factors. Prolonged exposure to high humidity, rain, or condensation-prone conditions makes the air compressor's internal motor highly susceptible to water ingress or moisture, leading to a series of problems such as decreased insulation performance, short circuits, and corrosion of metal components, severely impacting the motor's lifespan and the overall reliability of the machine. Especially in coastal areas, during the rainy season, or in environments with large diurnal temperature variations, condensation occurs frequently, further exacerbating the risk of motor moisture and corrosion. Therefore, it is necessary to improve the air compressor's waterproof, moisture-proof, and dustproof capabilities while maintaining its good heat dissipation performance, and enhance its environmental adaptability and operational reliability under complex working conditions. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a vehicle-mounted waterproof DC air compressor.

[0005] The objective of this utility model can be achieved through the following technical solution: A vehicle-mounted waterproof DC air compressor includes a DC motor, with a housing fixedly connected to both ends of the DC motor. A side end cover is fixedly connected to the outer end of the housing. The side end cover includes a closed disc-shaped baffle and a sealing portion extending axially from the inner side of the baffle towards the housing. The outer diameter of the baffle is larger than the outer diameter of the sealing portion. The housing has a mounting hole adapted to the sealing portion, and a first sealing element is provided between the sealing portion and the mounting hole. The DC motor is a coaxial dual-output DC motor. This solution, by using a closed side end cover and combining it with the sealing portion of the side end cover with the first sealing element between the mounting hole of the housing, eliminates the path for rainwater, moisture, and dust to enter the motor and housing from the side, significantly improving the air compressor's waterproof, moisture-proof, and dustproof capabilities under harsh outdoor, high-humidity, and dusty conditions, and effectively extending the service life of the motor and the entire machine.

[0006] Furthermore, the sealing part is housed within the mounting hole, and a fixing protrusion protrudes radially from the outer end of the housing along the mounting hole. A first fixing member passes through the fixing protrusion and is locked to the outer peripheral surface of the sealing part, and the first fixing member is located between the first sealing member and the sealing part.

[0007] Furthermore, the outer side of the sealing part has several heat dissipation strips protruding outward.

[0008] Furthermore, the housing has a stepped hole on the side near the DC motor; the DC motor includes a motor housing, one end of which has a stepped portion that matches the stepped hole; a second sealing element is provided between the stepped portion and the stepped hole.

[0009] Furthermore, the outer circumferential surface of the motor housing has several heat dissipation strips protruding outwards.

[0010] Furthermore, a valve plate and an air inlet seat are fixedly connected to the upper end of the housing, a third sealing element is provided between the valve plate and the housing, and a fourth sealing element is provided between the valve plate and the air inlet seat.

[0011] Furthermore, the upper surface of the air intake seat has several heat dissipation strips protruding upwards.

[0012] Furthermore, it also includes an air storage tank, which is connected to the air outlet on the air inlet seat, and the air inlet on the air inlet seat is connected to a silencer.

[0013] Furthermore, the box is connected to a pressure gauge via an air pipe.

[0014] Compared with existing technologies, the technical advantages of this utility model are as follows: First, by adopting a closed side end cover, combined with a first sealing element between the sealing part and the mounting hole, a second sealing element between the stepped part and the stepped hole, and a third and fourth sealing element at the valve plate, a multi-level sealing system is constructed. This structure fundamentally eliminates the path for rainwater, moisture, and dust to enter the motor and housing from the side and end, significantly improving the air compressor's waterproof, moisture-proof, and dustproof capabilities under harsh outdoor, high-humidity, and dusty conditions, effectively extending the service life of the motor and the entire machine. Second, heat dissipation strips are installed on key components such as the side end cover sealing part, the motor housing, and the air inlet seat. These heat dissipation strips significantly increase the contact area between key heat source parts and air without compromising the overall sealing performance, effectively dissipating heat through natural convection. Especially for typical application scenarios such as intermittent, short-duration operation like vehicle tire inflation, where the working time is short and the heat generated is limited, the heat dissipation capacity provided by this solution fully meets the usage requirements, achieving a perfect balance between heat dissipation and sealing performance. III. During operation, the DC motor starts, driving the piston inside the housing to reciprocate. External air enters the intake seat through the muffler, then passes through the valve plate into the compression chamber where it is compressed. The compressed gas enters the storage tank through the outlet, and finally, through the air pipe connected to the storage tank, it is used to inflate car tires, etc. The entire process is usually completed within a few minutes, without generating a large amount of accumulated heat. Therefore, the sealed heat dissipation design of this invention is completely effective and reliable. Attached Figure Description

[0015] Figure 1 This is a perspective view of the utility model.

[0016] Figure 2 This is a cross-sectional view of the present invention.

[0017] Figure 3 This is a side view of the present invention.

[0018] Drawing number markings: 1. DC motor; 2. Housing; 3. Side end cover; 4. Valve plate; 5. Air inlet seat; 6. Air tank; 7. Silencer; 8. Pressure gauge; 9. Air pipe; 11. Motor housing; 12. Stepped part; 13. Second seal; 21. Mounting hole; 22. Fixing protrusion; 23. Stepped hole; 31. Baffle part; 32. Sealing part; 33. First seal; 34. First fixing part; 41. Third seal; 51. Fourth seal; 52. Heat dissipation strip three; 53. Air outlet; 54. Air inlet; 111. Heat dissipation strip two; 311. Heat dissipation strip one. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figures 1 to 3 As shown, this utility model provides a vehicle-mounted waterproof DC air compressor, including a DC motor 1, a housing 2, a side end cover 3, a valve plate 4, an air inlet seat 5, an air tank 6, a muffler 7, and a pressure gauge 8. The DC motor 1 is a coaxial dual-output DC motor, with its two ends fixedly connected to the housing 2 by fasteners. The side end cover 3 is fixedly connected to the outer end of the housing 2. The side end cover 3 includes a closed disc-shaped baffle portion 31 and a sealing portion 32 extending axially from the inner side of the baffle portion 31 toward the housing 2. The outer diameter of the baffle portion 31 is larger than the outer diameter of the sealing portion 32, so that the side end cover 3 can effectively cover the end of the housing 2. The housing 2 is provided with a mounting hole 21 that matches the sealing portion 32. The sealing portion 32 is accommodated in the mounting hole 21, and a first sealing element 33 is provided between the sealing portion 32 and the mounting hole 21. The first sealing element 33 achieves a radial seal between the side end cover 3 and the housing 2, preventing rainwater, moisture and dust from entering the motor and housing from the side.

[0022] To enhance the fixation of the side end cover 3, a fixing protrusion 22 protrudes radially from the outer end of the housing 2 along the mounting hole 21. The first fixing member 34 passes through the fixing protrusion 22 and is locked to the outer peripheral surface of the sealing part 32, and the first fixing member 34 is located between the first sealing member 33 and the retaining part 31. This fixing method ensures the stable installation of the side end cover 3 and avoids the first fixing member 34 from damaging the sealing performance.

[0023] In terms of heat dissipation, the outer side of the baffle 31 has several heat dissipation strips 311 protruding outward. The heat dissipation strips 311 increase the contact area between the side end cover 3 and the air, and promote the heat dissipation of the motor by utilizing natural convection. At the same time, the closed structure of the baffle 31 ensures waterproofness.

[0024] The housing 2 has a stepped hole 23 on the side near the DC motor 1. The DC motor 1 includes a motor housing 11, one end of which has a stepped portion 12 that matches the stepped hole 23. A second sealing element 13 is provided between the stepped portion 12 and the stepped hole 23. The second sealing element 13 achieves end face sealing between the motor housing 11 and the housing 2, further preventing the external environment from entering through the connection. Several heat dissipation strips 111 protrude outward from the outer circumference of the motor housing 11. The heat dissipation strips 111 enhance the heat dissipation capacity of the motor housing 11, helping the motor to quickly dissipate heat during operation.

[0025] A valve plate 4 and an air inlet seat 5 are fixedly connected to the upper end of the housing 2. A third seal 41 is provided between the valve plate 4 and the housing 2 to ensure the sealing of the compression chamber. A fourth seal 51 (e.g., a sealing ring) is provided between the valve plate 4 and the air inlet seat 5 to prevent gas leakage. Several heat dissipation strips 52 protrude upwards from the upper surface of the air inlet seat 5 to increase the heat dissipation area of ​​the air inlet seat 5 and reduce the operating temperature of the valve plate area.

[0026] The gas storage tank 6 is connected to the outlet 53 on the air inlet seat 5 via a pipeline and is used to store compressed gas. The air inlet 54 on the air inlet seat 5 is connected to a silencer 7 to reduce intake noise. The housing 2 is connected to a pressure gauge 8 via an air pipe 9 to monitor the system pressure.

[0027] The working process of this utility model is as follows: When the DC motor 1 starts, it drives the piston inside the housing 2 to reciprocate. External air enters the air inlet 54 of the air inlet seat 5 through the muffler 7, and is compressed in the compression chamber through the valve plate 4. The compressed gas enters the air storage tank 6 through the air outlet 53 for storage, and is finally used to inflate equipment such as car tires through the air pipe connected to the air storage tank 6. The entire working process is usually completed within a few minutes, and the heat generated is limited. Through the heat dissipation design of heat dissipation strip 311, heat dissipation strip 111, and heat dissipation strip 52, the temperature of the whole machine can be effectively maintained within a safe range. At the same time, the multi-layer sealing system ensures waterproof, moisture-proof, and dustproof performance in harsh environments.

[0028] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A vehicle-mounted waterproof DC air compressor, comprising a DC motor (1), wherein a housing (2) is fixedly connected to both ends of the DC motor (1), and a side end cover (3) is fixedly connected to the outer end of the housing (2), characterized in that: The side end cap (3) includes a sealing portion (31) in the shape of a closed disc, and a sealing portion (32) extending axially from the inner side of the sealing portion (31) toward the housing (2); the outer diameter of the sealing portion (31) is larger than the outer diameter of the sealing portion (32); the housing (2) is provided with a mounting hole (21) that is adapted to the sealing portion (32), and a first sealing element (33) is provided between the sealing portion (32) and the mounting hole (21).

2. The vehicle-mounted waterproof DC air compressor according to claim 1, characterized in that: The sealing part (32) is housed in the mounting hole (21). The outer end of the housing (2) has a fixing protrusion (22) protruding radially along the mounting hole (21). The first fixing member (34) passes through the fixing protrusion (22) and is locked to the outer peripheral surface of the sealing part (32). The first fixing member (34) is located between the first sealing member (33) and the sealing part (31).

3. The vehicle-mounted waterproof DC air compressor according to claim 2, characterized in that: The outer side of the sealing part (31) has several heat dissipation strips (311) protruding outward.

4. A vehicle-mounted waterproof DC air compressor according to any one of claims 1 to 3, characterized in that: The housing (2) has a stepped hole (23) on the side near the DC motor (1); the DC motor (1) includes a motor housing (11), one end of which has a stepped portion (12) that matches the stepped hole (23); a second sealing element (13) is provided between the stepped portion (12) and the stepped hole (23).

5. A vehicle-mounted waterproof DC air compressor according to claim 4, characterized in that: The outer circumference of the motor housing (11) has several heat dissipation strips (111) protruding outward.

6. A vehicle-mounted waterproof DC air compressor according to any one of claims 1 to 3, characterized in that: The upper end of the housing (2) is fixedly connected to a valve plate (4) and an air inlet seat (5). A third sealing element (41) is provided between the valve plate (4) and the housing (2), and a fourth sealing element (51) is provided between the valve plate (4) and the air inlet seat (5).

7. A vehicle-mounted waterproof DC air compressor according to claim 6, characterized in that: The upper surface of the air intake seat (5) has several heat dissipation strips (52) protruding upwards.

8. A vehicle-mounted waterproof DC air compressor according to claim 6, characterized in that: It also includes an air tank (6), which is connected to the air outlet (53) on the air inlet seat (5), and the air inlet (54) on the air inlet seat (5) is connected to a silencer (7).

9. A vehicle-mounted waterproof DC air compressor according to claim 1, characterized in that: The box (2) is connected to a pressure gauge (8) via an air pipe (9).

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