Integrated motor assembly of compressor of vehicle-mounted oxygen generator

Abstract

The utility model discloses a kind of integrated motor assembly of vehicular oxygen generator compressor, including motor shell, the side of the motor shell is provided with controller cavity, the PCB board is installed in the controller cavity, the side of the controller cavity is hollow and is sealed by integrated cover plate, the outside of the integrated cover plate is integrally formed and provided with at least one plug-in connector seat, the PIN needle on the PCB board extends to corresponding plug-in connector seat by integrated cover plate, the edge position between the motor shell and integrated cover plate is provided with a circle of sealing component, by setting independent controller cavity on motor shell to install PCB board, the integrated structure of motor and controller is realized, and sealed by integrated cover plate of plug-in connector seat, avoid the wire harness between motor and controller, overall component is less, waterproof requirement can be met by sealing component.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted oxygen generator technology, specifically to an integrated motor assembly for a vehicle-mounted oxygen generator compressor. Background Technology

[0002] Car-mounted oxygen concentrators utilize a compressor to generate high-pressure air, which is then separated using the pressure swing adsorption principle of molecular sieves. The compressor requires a motor, and dust and water resistance are paramount for car-mounted products. Currently, most mainstream oxygen concentrator compressor assemblies on the market suffer from the following problems: 1. Most current car-mounted oxygen concentrators use a separate DC motor and controller design, requiring separate waterproofing for each, resulting in high costs; 2. This separate design necessitates additional wiring harnesses, impacting aesthetics and layout limitations; 3. The DC motor and controller generate significant heat. Utility Model Content

[0003] This utility model provides an integrated motor assembly for a vehicle-mounted oxygen concentrator compressor, which can solve the problems of waterproofing, heat dissipation, and wiring caused by the separate design of the compressor motor assembly in existing oxygen concentrators.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an integrated motor assembly for a vehicle-mounted oxygen concentrator compressor, comprising a motor housing, a controller cavity on one side of the motor housing, a PCB board installed inside the controller cavity, one side of the controller cavity being hollowed out and sealed by an integrated cover plate, at least one plug-in connector integrally formed on the outer side of the integrated cover plate, pins on the PCB board extending through the integrated cover plate into the corresponding plug-in connector, and a sealing component at the edge between the motor housing and the integrated cover plate. By setting an independent controller cavity on the motor housing to install the PCB board, an integrated structure of the motor and controller is achieved, and the sealing is achieved by driving the integrated cover plate of the plug-in connector, avoiding the wiring harness between the motor and controller. The overall components are few, and the waterproof requirements can be met by the sealing component.

[0005] Preferably, a fixing block is installed inside the controller cavity at a position corresponding to the plug-in connector. The PIN pin passes through the fixing block, which can position the PIN pin and prevent the excessively long PIN pin from bending or breaking during use.

[0006] Preferably, the bottom of the fixing block is inserted into the corresponding insertion holes on the PCB board through multiple elastic plugs, which facilitates the installation of the fixing block. At the same time, sufficient space can be left between the lower part of the fixing block and the PCB board for heat dissipation.

[0007] Preferably, the PCB board is connected to the motor housing by a plurality of first mounting screws at the edge position, and a thermal pad is provided at the contact position between the PCB board and the motor housing. The thermal pad allows the PCB board to quickly transfer heat to the motor housing, and the heat is dissipated through the metal motor housing, resulting in good heat dissipation.

[0008] Preferably, the thermal pad is a silicone pad, thermal grease, or thermal adhesive, which has good thermal conductivity.

[0009] Preferably, the sealing component includes a sealing strip embedded in a sealing groove along the edge and sealing sheets located on both sides of the sealing strip. The sealing sheets cover the contact surface between the motor housing and the integrated cover plate. The sealing sheets and the sealing strip form a double-layer sealing structure. The sealing strip can play the main sealing role by cooperating with the sealing groove, while the sealing sheets achieve a comprehensive sealing role through the sealing surface. The double sealing effect is good and meets the requirements of automotive grade.

[0010] Preferably, the motor housing and the integrated cover are connected by a plurality of second mounting screws passing through the sealing sheet, which provides good installation security. The sealing sheet surrounding the second mounting screws can improve the waterproof sealing of the second mounting screw positions.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] With a simple structure, the PCB board is installed in an independent controller cavity on the motor housing, realizing an integrated structure of motor and controller. The integrated cover plate of the plug-in connector is used for sealing, avoiding the wiring harness between the motor and controller. The overall components are few, and the waterproof requirements can be met by the sealing components. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a front sectional view of the present invention;

[0015] Figure 3 This is a perspective view of the present invention after the cover plate has been removed;

[0016] Figure 4 This is a first sectional view of the present invention after the cover plate has been removed;

[0017] Figure 5 This is a second sectional view of the present invention after the cover plate has been removed;

[0018] Figure 6 This is a three-dimensional structural diagram of the sealing component of this utility model.

[0019] Figure label:

[0020] 1. Motor housing; 11. Second mounting screw; 2. Integrated cover plate; 3. Controller cavity; 4. Plug-in connector; 5. PCB board; 6. Fixing block; 61. Flexible plug-in post; 7. Sealing component; 71. Sealing sheet; 72. Sealing strip; 8. First mounting screw; 9. Thermal pad; 10. Pin. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] like Figure 1-6 As shown, to address the waterproofing, heat dissipation, and wiring issues caused by the separate design of existing oxygen concentrator compressor motor assemblies, the following technical solution is provided: An integrated motor assembly for a vehicle-mounted oxygen concentrator compressor, comprising a motor housing 1, a controller cavity 3 on one side of the motor housing 1, a PCB board 5 installed inside the controller cavity 3, one side of the controller cavity 3 being hollowed out and sealed by an integrated cover plate 2, and at least one plug-in connector 4 integrally formed on the outer side of the integrated cover plate 2, with pins 10 on the PCB board 5 extending through the integrated cover plate 2 into the corresponding plug-in connector 4, the motor housing 1 and the integrated cover plate... A sealing component 7 is provided at the edge position between 2. In this embodiment, the motor and controller are integrated into the same motor housing, eliminating the need to design separate waterproof structures for the motor and controller, thus reducing the cost of waterproof components compared to the separate solution; at the same time, the overall size is reduced, making it suitable for the compact installation space of vehicle equipment; the PIN pin 10 extends directly to the plug-in connector 4 of the integrated cover plate 2, eliminating at least two connecting wires between the motor and controller, avoiding poor contact problems caused by wire bending and aging, and simplifying the assembly process and improving assembly efficiency; the sealing component 7 achieves overall sealing between the motor housing 1 and the integrated cover plate 2, eliminating the need for separate sealing of the controller cavity, thus improving sealing reliability.

[0023] Specifically, the motor housing 1 is made of die-cast ADC12 aluminum alloy. The controller cavity 3 is located on the right side of the motor housing 1. The PCB board 5 is made of epoxy resin glass cloth substrate on which the motor drive chip, power transistor, etc. are soldered. Four mounting holes are opened on the edge of the PCB board. The integrated cover plate 2 can be made of PA6+30% glass fiber reinforced plastic injection molding, and its size matches the hollow side of the controller cavity. Two plug-in connectors 4 are integrally formed on the outside of the cover plate. The plug-in connectors 4 can be of model MX34012SF1 (compatible with automotive standard wiring harness plugs). Each connector has 2-3 PIN pin holes. The PIN pins 10 are made of brass. One end is soldered to the signal output end of the PCB board by wave soldering, and the other end passes through the PIN pin holes of the integrated cover plate 2 and extends into the plug-in connectors 4.

[0024] In this embodiment, a fixing block 6 is installed in the controller cavity 3 at a position corresponding to the plug-in connector 4. The PIN pin 10 passes through the fixing block 6. The fixing block 6 provides multi-point support for the PIN pin 10, preventing it from drooping or bending due to its own length. Simultaneously, in a vehicle vibration environment, it reduces the vibration amplitude of the PIN pin 10, preventing wear caused by friction between the PIN pin 10 and the inner wall of the plug-in connector 4, thus extending the PIN pin's service life. Furthermore, the PIN pin through-holes in the fixing block 6 serve as assembly guides, allowing the PIN pin 10 to quickly align with the insertion hole of the integrated cover plate 2, shortening assembly time. Specifically, the fixing block 6 is made of plastic injection molding. Multiple through-holes with diameters matching the PIN pin 10 are formed along the length of the fixing block 6. The inner wall roughness of the through-holes Ra≤0.8μm ensures smooth passage of the PIN pin 10.

[0025] Furthermore, the bottom of the fixing block 6 can be inserted into the corresponding insertion holes on the PCB board 5 via multiple elastic insertion posts 61, facilitating the installation of the fixing block 6. Sufficient space can be left between the lower part of the fixing block 6 and the PCB board 5 for heat dissipation. Specifically, the elastic insertion posts 61 have a certain deformation capacity, which can automatically calibrate the assembly deviation between the fixing block and the PCB board 5 during installation, avoiding cracking of the PCB board 5 insertion holes caused by hard connections. This also simplifies the installation operation, eliminating the need for additional fasteners and shortening installation time. Additionally, the elastic insertion posts 61 are 8mm long, allowing the bottom of the fixing block 6 to conform to the surface of the PCB board 5. A 5mm gap is formed, which can form an air convection channel to transfer heat from the PCB board surface to the controller cavity, assisting the heat dissipation of the thermal pad. The flexible plug 61 can be made of silicone rubber, which has good elasticity and temperature resistance. The top is equipped with a barb structure, and the barb material is hard PVC to ensure that it is not easy to fall off after insertion. During assembly, align the two flexible plugs 61 at the bottom of the fixing block 6 with the plug holes of the PCB board 5 and apply an axial pressure of 5-8N. After the flexible plug 61 is compressed, it is inserted into the hole, and the top barb is stuck on the back of the PCB board 5 to ensure that it does not loosen under vehicle vibration environment.

[0026] In this embodiment, the PCB board 5 is connected to the motor housing 1 via multiple first mounting screws 8 at its edge. A thermal pad 9 is provided at the contact point between the PCB board 5 and the motor housing 1. The thermal pad 9 allows the PCB board 5 to quickly transfer heat to the motor housing 1, which then dissipates heat through the metal motor housing 1, resulting in good heat dissipation. The thermal pad 9 is a silicone pad, thermal grease, or thermal adhesive, possessing excellent thermal conductivity. The thermal grease (model 704) has a thermal conductivity of up to 3.0 W / (m·K) and good fluidity, capable of filling micro-gaps ≤0.5 mm. Compared to the silicone pad, it has lower thermal resistance and improves heat dissipation efficiency by 10%, making it suitable for scenarios requiring high adhesion between the PCB board and the motor housing. The thermal adhesive (model CT-200) has a thermal conductivity ≥2.2 W / (m·K) after curing and a bonding strength ≥1 MPa, permanently fixing the PCB board to the motor housing and preventing screw loosening due to vibration. It is also waterproof, making it suitable for scenarios with no maintenance requirements and high reliability needs.

[0027] In this embodiment, as Figure 6As shown, the sealing component 7 includes a sealing strip 72 embedded in the sealing groove along its edge and sealing sheets 71 located on both sides of the sealing strip 72. The sealing sheets 71 cover the contact surface between the motor housing 1 and the integrated cover plate 2. The sealing sheets 71 and the sealing strip 72 form a double-layer sealing structure. The sealing strip 72 plays a major sealing role by cooperating with the sealing groove, while the sealing sheets 71 achieve a comprehensive sealing role through the sealing surface. The double sealing effect is good and meets the requirements of automotive grade. Specifically, the sealing strip 72 forms a "line seal" by compressing with the sealing groove, which can block more than 90% of water and dust; the sealing sheets 71 cover the entire contact surface to form a "surface seal", which can block the remaining 10% of tiny water vapor and dust. After the double seal is superimposed, it can achieve an IP68 waterproof rating and an IP6X dustproof rating, which is suitable for extreme vehicle environments such as heavy rain, wading, and sandstorms. Furthermore, the sealing sheet 71 is 0.5mm thick and has a certain degree of ductility, which can compensate for the assembly flatness error between the motor housing and the integrated cover plate, avoiding sealing failure caused by flatness error. Specifically, the sealing strip 72 is made of EPDM rubber, with a rectangular cross-section and a length consistent with the sealing groove. The sealing groove is opened on the hollow side edge of the motor housing controller cavity. The sealing sheet 71 can be made of the same material as the sealing strip 72, or it can be integrated with the sealing strip 72.

[0028] In this embodiment, the motor housing 1 and the integrated cover plate 2 are connected by a plurality of second mounting screws 11 passing through the sealing sheet 71, which provides good installation stability. The sealing sheet 71 surrounds the second mounting screws 11, which can improve the waterproof sealing of the second mounting screws 11. Four second mounting screws 11 can be provided. The through holes of the sealing sheet 71 are tightly fitted with the screws to form a radial seal, which can prevent water and dust from entering from the gap between the screw and the mounting hole.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An integrated motor assembly for a vehicle-mounted oxygen concentrator compressor, characterized in that, The device includes a motor housing (1), a controller cavity (3) is provided on one side of the motor housing (1), a PCB board (5) is installed in the controller cavity (3), one side of the controller cavity (3) is hollow and sealed by an integrated cover plate (2), at least one plug-in connector (4) is integrally formed on the outer side of the integrated cover plate (2), the PIN pins (10) on the PCB board (5) pass through the integrated cover plate (2) and extend into the corresponding plug-in connector (4), and a sealing component (7) is provided at the edge position between the motor housing (1) and the integrated cover plate (2).

2. The integrated motor assembly of the vehicle-mounted oxygen generator compressor according to claim 1, characterized in that: A fixing block (6) is installed in the controller cavity (3) at a position corresponding to the plug-in connector (4), and the PIN pin (10) passes through the fixing block (6).

3. The integrated motor assembly of the vehicle-mounted oxygen concentrator compressor according to claim 2, characterized in that: The bottom of the fixing block (6) is inserted into the corresponding insertion hole on the PCB board (5) through multiple elastic insertion posts (61).

4. The integrated motor assembly of the vehicle-mounted oxygen generator compressor according to claim 1, characterized in that: The PCB board (5) is connected to the motor housing (1) by a plurality of first mounting screws (8) at the edge position, and a heat-conducting pad (9) is provided at the position where the PCB board (5) contacts the motor housing (1).

5. The integrated motor assembly of the vehicle-mounted oxygen generator compressor according to claim 4, characterized in that: The thermal pad (9) is a silicone pad, thermal grease, or thermal adhesive.

6. The integrated motor assembly of the vehicle-mounted oxygen generator compressor according to claim 1, characterized in that: The sealing component (7) includes a sealing strip (72) embedded in a sealing groove along its edge and sealing sheets (71) located on both sides of the sealing strip (72), the sealing sheets (71) covering the contact surface between the motor housing (1) and the integral cover plate (2).

7. The integrated motor assembly of the vehicle-mounted oxygen generator compressor according to claim 6, characterized in that: The motor housing (1) and the integral cover plate (2) are connected by a plurality of second mounting screws (11) passing through the sealing sheet (71).

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