The circuit board assembly structure of the pump unit, the pump unit and the vehicle

Abstract

This application provides a circuit board assembly structure for a pump device, a pump device, and a vehicle. The circuit board assembly structure includes: a circuit board; at least one electrical connector disposed on and electrically connected to the circuit board, the electrical connector including a socket and an elastic conductive part; an end cap including a first connecting part for connecting to the housing of the pump device; and a connector including a pin and a sleeve sleeved outside the pin, the sleeve and the circuit board being located on opposite sides of the end cap, the pin passing through the end cap and engaging with the socket and contacting the elastic conductive part. This application utilizes an electrical connector to achieve plug-in and pull-out connection between the connector pin and the circuit board, achieving solderless fixing and simplifying the operation. Simultaneously, because the elastic conductive part of the electrical connector can elastically deform, the resistance encountered when the pin is inserted into the socket is significantly reduced, thereby significantly reducing the operating force when the pin is plugged into the circuit board, greatly reducing the assembly difficulty of the pin and the circuit board.

Description

Technical Field

[0001] This application relates to the field of pump device technology, and more specifically, to a circuit board assembly structure for a pump device, a pump device, and a vehicle. Background Technology

[0002] Currently, there are two main ways to connect the pins of pump connectors to the circuit board: one is to use welding to fix them and achieve electrical connection; the other is to use press-fit technology (press-fit technology uses press-fit pins to achieve connection through interference fit, thus eliminating the need for soldering contacts). Welding is simple, but in some structurally constrained environments, it is difficult to provide enough space for welding equipment, making it relatively difficult to implement. Press-fit refers to the interference fit between the pin and the hole on the circuit board. The advantage is that soldering is eliminated, but the disadvantage is that press-fit pins (or press-fit terminals) require specific materials and structures, resulting in higher costs. It also requires high positioning accuracy and pressing force in the press-fit process, making the process complex and assembly costly. Summary of the Invention

[0003] In order to solve at least one of the above-mentioned technical problems, one object of this application is to provide a circuit board assembly structure for a pump device.

[0004] Another object of this application is to provide a pump device including the above-described circuit board assembly structure.

[0005] Another object of this application is to provide a vehicle including the above-described pump device.

[0006] To achieve the above objectives, according to an embodiment of the first aspect of this application, a circuit board assembly structure for a pump device is provided, comprising: a circuit board; at least one electrical plug-in disposed on the circuit board and electrically connected to the circuit board, the electrical plug-in including a socket and an elastic conductive portion; an end cap including a first connecting portion for connecting to the housing of the pump device; and a connector including a pin and a sleeve sleeved outside the pin, the sleeve and the circuit board being located on opposite sides of the end cap, the pin passing through the end cap and engaging with the socket and contacting the elastic conductive portion.

[0007] The circuit board assembly structure provided in the first aspect of this application utilizes electrical connectors to achieve plug-in / plug-out connections between connector pins and the circuit board, realizing solderless fixation and simplifying operation. Simultaneously, because the elastic conductive part of the electrical connector can undergo elastic deformation, the resistance encountered when the pin is inserted into the socket is significantly reduced, thereby significantly reducing the operational force required to connect the pin to the circuit board and greatly simplifying the assembly difficulty. Furthermore, the restoring elastic force of the elastic conductive part ensures good contact between the elastic conductive part and the pin, thus improving the reliability of the connection between the pin and the electrical connector. Compared to the Pressfit process, the insertion and removal method of the pin and electrical connector in this solution is simpler, significantly reducing the requirements for pressing force and positioning accuracy, making assembly convenient and quick, thus helping to reduce assembly costs; and the pins can be ordinary pins, further reducing production costs.

[0008] In addition, the circuit board assembly structure of the pump device in the above-mentioned technical solution provided in this application may also have the following additional technical features:

[0009] According to one embodiment of this application, the electrical plug-in further includes: a connector fixedly connected to the circuit board, the connector having the socket, and the elastic conductive part including at least one spring piece, one end of the spring piece being connected to the connector, the other end of the spring piece being formed as a free end, and the free end extending obliquely toward the central axis of the socket.

[0010] The electrical connector also includes a connector base, which is fixedly connected to the circuit board to achieve both mechanical and electrical connections between the electrical connector and the circuit board. The connector base has a socket for the insertion of the connector pins. The elastic conductive part includes at least one spring clip. The spring clip's design increases the contact area between the elastic conductive part and the pin, thereby improving the reliability of the electrical connection between the pin and the electrical connector. One end of the spring clip is connected to the connector base, ensuring electrical connection between the pin, spring clip, connector base, and circuit board. The other end of the spring clip is a free end, extending at an angle in the opposite direction to the central axis of the socket. When the pin passes through the socket and contacts the spring clip, it will press the spring clip away from the central axis of the socket. Due to the spring clip's restoring force, the spring clip maintains good contact with the pin, thus achieving elastic insertion and removal of the pin and the electrical connector, and ensuring a reliable connection between the pin and the electrical connector.

[0011] According to one embodiment of this application, there are multiple spring pieces, which are arranged circumferentially along the socket, and the pin contacts the multiple spring pieces.

[0012] By designing multiple spring contacts arranged circumferentially around the socket, the pin can contact multiple spring contacts after insertion, further increasing the contact area between the pin and the elastic conductive part, thus improving the connection reliability between the pin and the electrical connector. Simultaneously, the force exerted by multiple spring contacts helps to balance the force on the pin circumferentially, preventing tilting or displacement, thereby further improving the connection reliability. Before pin insertion, the distance between the free ends of the multiple spring contacts is relatively small. During insertion, the distance between the free ends gradually increases, clamping the pin and ensuring reliable fixation.

[0013] According to one embodiment of this application, the connector includes: at least one solder pad, which is soldered and fixed to the circuit board; and a bracket, which is connected to the solder pad, the bracket having the insertion hole and being connected to one end of the spring, and the bracket having a clearance space for the spring to undergo elastic deformation.

[0014] The connector includes a bracket and at least one solder pad. The solder pad is soldered to the circuit board, achieving a fixed connection and electrical connection between the connector and the circuit board. The bracket is connected to the solder pad and the spring contact, achieving an electrical connection between the bracket and the solder pad and the spring contact. The bracket has a socket for pin insertion and a clearance space to facilitate clearance of the spring contact, allowing the spring contact to easily deform elastically. This further reduces the insertion force of the pin and thus further reduces assembly difficulty.

[0015] According to one embodiment of this application, the pad is soldered to the surface of the circuit board facing the end cover, one end of the bracket is connected to the pad, and the other end of the bracket extends through the circuit board to the side of the circuit board facing away from the end cover.

[0016] In this design, the bracket extends through the circuit board. Since the circuit board has a certain thickness, it forms a reinforcing structure around the bracket, which supports and fixes the bracket, reducing the risk of deformation such as tilting or displacement, thereby improving the reliability of the electrical components.

[0017] According to one embodiment of this application, the end cap is a plastic part, and the end cap and the connector are an integral structure.

[0018] For products with low heat dissipation requirements, plastic end caps can be used, which reduces product weight and cost compared to metal parts. Furthermore, plastic end caps can be injection molded into a single unit with the connectors, eliminating the need for assembly and sealing between them. This simplifies the product structure and assembly process, thereby reducing production and assembly costs.

[0019] According to one embodiment of this application, the end cap is a metal part, and the end cap and the connector are separate structures.

[0020] The end cap is made of metal. Since metal has good thermal conductivity, it is conducive to the rapid heat dissipation of the circuit board, preventing the circuit board from overheating and improving the reliability of the circuit board.

[0021] According to one embodiment of this application, the connector further includes: a base plate, which is connected to one end of the sleeve near the circuit board, the base plate is stacked on the end cap and fixedly connected to the end cap, the end cap is provided with an assembly hole, and the pin passes through the base plate and the assembly hole to be inserted and engaged with the electrical connector.

[0022] The connector also includes a base plate, which is connected to the end of the sleeve closest to the circuit board. Pins pass through the base plate and are fixedly connected to it, ensuring the integrity of the connector. During assembly, the base plate is stacked on the end cap and fixedly connected to it, enabling the connector to connect to the end cap.

[0023] According to one embodiment of this application, the connector further includes: a positioning post, which is connected to the base plate and is inserted into the mounting hole, and a pin passes through the positioning post and is fixedly connected to the positioning post.

[0024] The connector also includes a positioning post, which can be inserted into the mounting hole to play a good positioning role, realize the rapid positioning between the connector and the end cap, and thus improve assembly efficiency.

[0025] According to one embodiment of this application, the circuit board assembly structure of the pump device further includes: a first sealing ring, which is disposed between the base plate and the end cover and is arranged circumferentially along the assembly hole.

[0026] A first sealing ring is installed between the base plate and the end cover to ensure the sealing reliability between the end cover and the connector, and to prevent liquid from entering the pump unit through the gap between the end cover and the base plate, thereby improving the reliability of the pump unit.

[0027] According to one embodiment of this application, a recess is provided at one end of the assembly hole near the base plate, the recess is provided circumferentially along the assembly hole, and a portion of the first sealing ring is embedded in the recess.

[0028] A groove is provided at the end of the assembly hole near the base plate, which not only facilitates the assembly of the first sealing ring, but also limits the position of the first sealing ring to prevent it from shifting, thereby improving the reliability of the first sealing ring.

[0029] According to one embodiment of this application, the circuit board assembly structure of the pump device further includes: a fixing plate located on one side of the circuit board, and the circuit board being fixed on the fixing plate.

[0030] The mounting plate not only secures the circuit board but also provides support, preventing deformation of electrical components during insertion and removal from connectors, thus improving the reliability of insertion and removal of electrical components and connectors.

[0031] According to one embodiment of this application, the fixing plate includes: a fixing plate body; and at least one fixing part, the fixing part protruding from the fixing plate body on the surface facing the circuit board; wherein the circuit board is provided with at least one first connection hole, and the fixing part cooperates with the first connection hole to fix the circuit board to the fixing plate.

[0032] The fixing plate includes a fixing plate body and at least one fixing part. The fixing plate body is the main part of the fixing plate and can support the circuit board. The fixing part cooperates with the first connecting hole of the circuit board to fix the circuit board and ensure the stability of the circuit board. At the same time, the fixing part protrudes from the fixing plate body on the surface of the fixing plate facing the circuit board, which can make a certain distance between the fixing plate body and the circuit board, so as to avoid the components on the circuit board, which is conducive to the rational layout of the components on the circuit board, and also facilitates the heat dissipation of the circuit board.

[0033] According to one embodiment of this application, the fixing part is fixedly connected to the first connecting hole by a fastener; or the fixing part is riveted to the first connecting hole; or the fixing part includes at least one first buckle, which engages with the first connecting hole.

[0034] The fixing part and the first connecting hole are fixedly connected by fasteners such as screws, which has high connection strength and is firmly fixed.

[0035] Alternatively, the fixing part can be riveted to the first connecting hole, which also provides a high connection strength and a more reliable fixation.

[0036] Alternatively, the fixing part includes at least one first buckle, which passes through the first connecting hole and engages with the circuit board. Compared with the screw connection method, the assembly method is simpler and faster, which helps to simplify the assembly process and further improve the assembly efficiency.

[0037] According to one embodiment of this application, the fixing plate and the end cap are located on opposite sides of the circuit board. The fixing plate includes a second connecting portion for connecting the housing of the pump device, and the fixing plate is provided with a clearance notch adapted to avoid the motor terminals of the pump device and the components of the circuit board.

[0038] In this design, the fixing plate can be connected to the housing of the pump unit via the second connecting part. The fixing plate also has a clearance notch, which allows for clearance between the motor terminals of the pump unit and components on the circuit board facing the fixing plate. This ensures that the motor terminals of the pump unit can pass through the fixing plate and connect to the circuit board, while also facilitating the rational layout of components on the circuit board facing the fixing plate. Furthermore, during assembly, the fixing plate can be connected to the housing first, then the circuit board can be fixed to the fixing plate. Next, the motor terminals can be connected to the circuit board, then the assembly formed by the connector and the end cover can be installed, allowing the connector pins to connect to the electrical connectors. Finally, the end cover can be fixedly connected to the housing. The assembly method is simple and quick.

[0039] According to one embodiment of this application, the circuit board is provided with a soldering hole for the motor terminal of the pump device to be inserted and soldered to the circuit board along the direction from the fixing plate to the circuit board, and the clearance notch is provided corresponding to the soldering hole; or the number of electrical plugs is multiple, and a portion of the multiple electrical plugs is used to plug and cooperate with the motor terminal of the pump device.

[0040] When the circuit board has soldering holes, these holes can be used to solder the motor terminals, achieving a strong, secure, and reliable connection. During assembly, the mounting plate is first connected to the housing, then the circuit board is fixed to the mounting plate. Next, the motor terminals are soldered to the circuit board. Then, the assembly formed by the connector and end cover is installed, connecting the connector pins to the electrical connector. Finally, the end cover is fixed to the housing. This assembly method is simple and quick, solving the problem of difficult soldering of the motor terminals to the circuit board due to the motor and connector being located on opposite sides of the circuit board in existing technologies.

[0041] Alternatively, the electrical connection between the motor terminals and the circuit board can also be achieved through plug-in connection with electrical connectors. In this way, the connection between the circuit board and the motor terminals and connectors is fixed without soldering, which can eliminate the need for soldering equipment on the production line, and achieve flexible plug-in fixation between the circuit board and the motor terminals, further reducing the assembly difficulty of the circuit board and thus further improving assembly efficiency.

[0042] According to one embodiment of this application, the second connecting portion includes a snap-fit ​​portion for snap-fit ​​connection with the housing of the pump device, the snap-fit ​​portion including at least one second latch and / or at least one slot.

[0043] The fixing plate engages with the housing via a snap-fit ​​mechanism, simplifying and speeding up assembly and improving efficiency. Specifically, when the snap-fit ​​mechanism includes a second latch, the housing correspondingly includes a slot. When the snap-fit ​​mechanism includes a slot, the housing correspondingly includes a second latch. When there are multiple second latches, they are spaced circumferentially around the fixing plate, which helps to balance the forces between the fixing plate and the housing, thereby improving the reliability of the connection.

[0044] According to one embodiment of this application, the fixing plate further includes at least one positioning portion for engaging with the housing of the pump device to achieve positioning, the positioning portion including at least one positioning protrusion and / or at least one positioning groove.

[0045] The fixing plate, through a convex-concave fit with the housing via a positioning part, enables rapid positioning of the fixing plate, preventing assembly errors and further improving assembly efficiency. Specifically, when the positioning part includes a positioning protrusion, the housing correspondingly includes a positioning groove. When the positioning part includes a positioning groove, the housing correspondingly includes a positioning protrusion. When there are multiple positioning parts, they are spaced apart circumferentially along the fixing plate, which also helps to balance the force between the fixing plate and the housing, thereby improving the connection reliability between the fixing plate and the housing.

[0046] According to one embodiment of this application, the circuit board includes a circuit board body and a heat dissipation element. The electrical plug is disposed on the circuit board body, and the heat dissipation element is disposed on the surface of the circuit board body facing the end cover. The circuit board assembly structure of the pump device also includes a heat-conducting structure, which is disposed between the heat dissipation element and the end cover and contacts the heat dissipation element and the end cover. The end cover is a metal part.

[0047] The circuit board includes the circuit board body and a heat dissipation element. The heat dissipation element facilitates the timely dissipation of heat generated by the circuit board, preventing overheating and malfunctions during use, thus improving the reliability of the circuit board and consequently the pump unit. A thermally conductive structure is added between the heat dissipation element and the end cap, and the end cap is made of metal. Due to the excellent thermal conductivity of metal and the thermally conductive structure, heat from the heat dissipation element can be quickly transferred to the end cap and then dissipated outwards, significantly improving the product's heat dissipation performance. The end cap can be made of, but is not limited to, aluminum, copper, iron, etc.

[0048] According to one embodiment of this application, the thermally conductive structure includes at least one of thermally conductive adhesive and thermally conductive pad.

[0049] Thermal adhesive is applied by means of a simple and low-cost process. It can be applied to at least one of the heat sink element and the end cap, making it convenient to use. Thermal pads can also be fixed by adhesive or directly clamped between the heat sink element and the end cap, which also has the advantages of simple structure, easy assembly, and low cost.

[0050] According to one embodiment of this application, the end cap includes: an end cap body, the end cap body including the first connecting portion; and a heat dissipation boss, the heat dissipation boss being disposed on the board surface of the end cap body facing the circuit board body and correspondingly disposed with the heat dissipation element; wherein, the heat conduction structure is disposed between the heat dissipation element and the heat dissipation boss, and is in contact with the heat dissipation element and the heat dissipation boss.

[0051] The end cover includes an end cover body and a heat dissipation protrusion. The end cover body includes a first connecting part, which enables a fixed connection between the end cover and the housing. The heat dissipation protrusion helps to further increase the heat dissipation area of ​​the end cover, thereby further improving the heat dissipation effect. At the same time, it also helps to reduce the thickness of the heat-conducting structure, simplify the heat-conducting structure, and thus reduce the cost of the heat-conducting structure.

[0052] According to one embodiment of this application, the end cap further includes a positioning boss, which is disposed on the surface of the end cap body facing the circuit board and is adapted to the shape of the housing for embedding into the housing.

[0053] Because the positioning boss is compatible with the shape of the housing, it can be directly embedded into the housing during assembly, thereby fixing the end cover and the housing relatively and playing a good role in assembly positioning, thus further improving assembly efficiency.

[0054] According to one embodiment of this application, the outer wall of the positioning boss is provided with a sealing groove for installing a second sealing ring, and the sealing groove is arranged along the circumference of the positioning boss.

[0055] A sealing groove is provided on the outer wall of the positioning boss, and a second sealing ring is installed in the sealing groove. After assembly, the second sealing ring is sandwiched between the outer wall of the positioning boss and the housing, providing a radial seal between the housing and the end cover. This design helps to reduce the thickness of the end cover body, which in turn helps to reduce the axial dimension of the pump unit.

[0056] Of course, when the thickness of the end cover body and / or the wall thickness of the housing are sufficient, a sealing groove can be set on the plate surface of the end cover facing the housing and / or the end surface of the housing facing the end cover. After assembly, the second sealing ring can achieve axial sealing between the end cover and the housing, and can also ensure the sealing reliability between the end cover and the housing.

[0057] According to one embodiment of this application, the circuit board assembly structure of the pump device further includes: heat dissipation fins disposed on the end cover facing away from the circuit board.

[0058] By placing heat dissipation fins on the surface of the end cap away from the circuit board, the heat dissipation area of ​​the product can be further increased, thereby further improving the heat dissipation performance of the product.

[0059] According to one embodiment of this application, the circuit board further includes a grounding element disposed on the surface of the circuit board body facing the end cover and in contact with the end cover.

[0060] When the end cap is made of metal, the conductivity of metal allows for electrical connection when the circuit board's grounding element comes into physical contact with the metal end cap. This enables the circuit board to be grounded, improving its electromagnetic interference protection and thus enhancing its electromagnetic compatibility (EMC) performance. The grounding element can be, but is not limited to, a grounding spring.

[0061] According to one embodiment of this application, the first connecting portion includes a second connecting hole through which a fastener passes, so that the end cap is fixedly connected to the housing by the fastener.

[0062] A second connection hole is provided on the end cover, which can be used to fix the end cover to the housing with screws or other fasteners during assembly. The structure is simple and the fixation is reliable.

[0063] According to an embodiment of the second aspect of this application, a pump device is provided, comprising: a pump section having an inlet and an outlet; a motor section connected to the pump section, the motor section including a housing and motor terminals; and a circuit board assembly structure of the pump device as described in any of the embodiments of the first aspect, wherein the end cover of the circuit board assembly structure is connected to the housing via a first connecting portion, and the motor terminals are electrically connected to the circuit board of the circuit board assembly structure.

[0064] The pump device provided in the second aspect of this application, having included the circuit board assembly structure of any of the embodiments in the first aspect, has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0065] According to one embodiment of this application, the housing includes at least one snap-fit ​​portion for snap-fitting with a snap-fit ​​portion of the circuit board assembly structure.

[0066] The snap-fit ​​portion of the housing corresponds to the snap-fit ​​portion of the fixing plate, enabling the housing and fixing plate to snap together and secure each other. This simplifies assembly, speeds up assembly, and improves assembly efficiency. Specifically, when the snap-fit ​​portion includes a second latch, the snap-fit ​​portion correspondingly includes a slot. When the snap-fit ​​portion includes a slot, the snap-fit ​​portion correspondingly includes a second latch.

[0067] According to one embodiment of this application, the housing is a metal part.

[0068] The casing is made of metal, which, due to its excellent thermal conductivity, facilitates heat dissipation. Furthermore, when the end cover is also made of metal, and it contacts the grounding element of the circuit board, and is fixed to the casing via conductive screws, the end cover achieves electrical conductivity through the conductive screws and the metal casing. Alternatively, if the end cover is directly connected to the casing, it achieves direct electrical conductivity with the metal casing. In this way, the casing and the grounding element of the circuit board are also indirectly electrically connected, realizing a grounding design and further improving the product's electromagnetic compatibility, i.e., its EMC performance.

[0069] The casing can be made of, but is not limited to, aluminum, copper, iron, etc.

[0070] According to one embodiment of the third aspect of this application, a vehicle is provided, comprising: a vehicle body; and a pump device as described in any of the embodiments of the second aspect, the pump device being disposed on the vehicle body.

[0071] The vehicle provided by the embodiments of the third aspect of this application, having included the pump device of any of the embodiments of the second aspect, has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0072] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0073] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0074] Figure 1 This is an exploded view of a circuit board assembly structure provided in one embodiment of this application;

[0075] Figure 2 This is an exploded view of a circuit board assembly structure provided in one embodiment of this application;

[0076] Figure 3 This is a three-dimensional structural schematic diagram of an electrical plug-in provided in one embodiment of this application;

[0077] Figure 4 yes Figure 3 The diagram shows the structure of the electrical plug-in from a first-view perspective.

[0078] Figure 5 yes Figure 3 The diagram shows the structure of the electrical plug-in from a second-view perspective.

[0079] Figure 6 yes Figure 3 The diagram shows the structure of the electrical plug-in from a third-view perspective.

[0080] Figure 7 This is a three-dimensional structural schematic diagram of an end cap provided in one embodiment of this application;

[0081] Figure 8 This is a schematic diagram of the circuit board from a first-view perspective according to an embodiment of this application;

[0082] Figure 9 yes Figure 8 A schematic diagram of the circuit board from a second perspective;

[0083] Figure 10 yes Figure 8 The diagram shows the structure of the circuit board from a third-view perspective;

[0084] Figure 11 This is a three-dimensional structural diagram of a fixing plate provided in one embodiment of this application;

[0085] Figure 12 yes Figure 11 A structural schematic diagram of the fixed plate from a first-view perspective;

[0086] Figure 13 yes Figure 11 A structural schematic diagram of the fixed plate from a second perspective;

[0087] Figure 14 This is an exploded view of a circuit board assembly structure provided in one embodiment of this application;

[0088] Figure 15 This is a cross-sectional structural schematic diagram of a pump device (oil seal omitted) provided in one embodiment of this application;

[0089] Figure 16 This is a three-dimensional structural schematic diagram of a pump device provided in one embodiment of this application;

[0090] Figure 17 This is a partial cross-sectional view of a pump device provided in one embodiment of this application;

[0091] Figure 18 This is a schematic diagram of the structure of a pump cover (including the orthographic projection of the internal gear on the pump cover) provided in one embodiment of this application;

[0092] Figure 19 This is a partial cross-sectional view of a pump device provided in one embodiment of this application;

[0093] Figure 20 yes Figure 18 A partial structural schematic diagram of the pump cover of the pump device shown.

[0094] Figure 21 This is a schematic block diagram of a vehicle provided in one embodiment of this application;

[0095] Figure 22 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application.

[0096] in, Figures 1 to 22 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0097] 1. Circuit board, 11. Circuit board body, 111. First connection hole, 112. Soldering hole, 12. Heat dissipation element, 13. Heat conduction structure, 14. Grounding element;

[0098] 2 Electrical plug, 21 Flexible conductive part, 211 Spring piece, 22 Connector, 221 Bracket, 2211 Socket, 222 Solder pad, 223 Clearance space;

[0099] 3. End cap, 31. End cap body, 311. First connecting part, 3111. Second connecting hole, 32. Positioning boss, 321. Sealing groove, 33. Assembly hole, 331. Countersunk groove, 34. First sealing ring, 35. Heat dissipation boss, 36. Second sealing ring, 37. Heat dissipation fins, 38. Grounding boss, 39. Fastener.

[0100] 4 connectors, 41 pins, 42 sleeves, 43 base plate, 44 positioning pins;

[0101] 5 Fixing plate, 51 Fixing plate body, 511 Clearance notch, 52 Fixing part, 521 First buckle, 53 Second connecting part, 531 Second buckle, 54 Positioning part, 541 Positioning groove;

[0102] 6 Pump section, 61 Inlet, 62 Outlet, 63 Internal gear, 64 External gear, 65 Pump cover, 651 Second lubrication groove, 652 Thrust lubrication groove, 653 Throttling orifice, 654 Second flow groove, 655 Second throttling groove, 656 Oil sump, 657 Second bearing section, 66 First pressure chamber, 67 Second pressure chamber;

[0103] 7 Motor section, 71 Motor terminal, 72 Housing, 720 Snap-fit ​​part, 721 First throttling groove, 722 First lubrication groove, 723 First flow groove, 724 Pressure relief hole, 725 First bearing section, 726 Pressure relief chamber, 73 Rotor assembly, 74 Stator assembly, 75 Shaft, 76 Oil seal;

[0104] 100 Circuit board assembly structure, 200 Pump unit, 300 Vehicle, 302 Car body, 304 Drive components, 306 Oil reservoir. Detailed Implementation

[0105] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0106] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0107] The following reference Figures 1 to 22 This application describes the circuit board assembly structure of a pump device, a pump device, and a vehicle provided in some embodiments.

[0108] like Figure 1 As shown, an embodiment of the first aspect of this application provides a circuit board assembly structure 100 for a pump device 200, which includes: a circuit board 1, at least one electrical plug 2, an end cap 3, and a connector 4.

[0109] Specifically, the electrical plug-in 2 is disposed on the circuit board 1 and is electrically connected to the circuit board 1. The electrical plug-in 2 includes a socket 2211 and an elastic conductive part 21.

[0110] The end cap 3 includes a first connecting portion 311. The first connecting portion 311 is used to connect to the housing 72 of the pump assembly 200.

[0111] The connector 4 includes a pin 41 and a sleeve 42 sleeved on the outside of the pin 41. The sleeve 42 and the circuit board 1 are located on opposite sides of the end cover 3. The pin 41 passes through the end cover 3 and engages with the socket 2211, and contacts the elastic conductive part 21.

[0112] The circuit board assembly structure 100 provided in the first aspect of this application uses electrical plug-in 2 to realize the plug-in connection between the pin 41 of the connector 4 and the circuit board 1, achieving solderless fixation and a relatively simple operation method.

[0113] Meanwhile, since the elastic conductive part 21 of the electrical plug 2 can undergo elastic deformation, the resistance encountered by the pin 41 when it is inserted into the socket 2211 can be significantly reduced, thereby significantly reducing the operating force when the pin 41 is plugged into the circuit board 1, greatly reducing the assembly difficulty of the pin 41 and the circuit board 1; and the reset elastic force of the elastic conductive part 21 can be used to ensure good contact between the elastic conductive part 21 and the pin 41, thereby improving the reliability of the fit between the pin 41 and the electrical plug 2.

[0114] Compared to the Pressfit process, the insertion and removal of the pin 41 and the electrical connector 2 in this solution is simpler, significantly reducing the requirements for pressing force and positioning accuracy, making assembly convenient and quick, thus helping to reduce assembly costs; and the pin 41 can be a regular pin 41, which helps to reduce production costs.

[0115] Specifically, the circuit board assembly structure 100 includes a circuit board 1, an electrical connector 2, an end cap 3, and a connector 4. The electrical connector 2 is mounted on and electrically connected to the circuit board 1. The pins 41 of the connector 4 are electrically connected to the electrical connector 2, thus achieving an electrical connection between the pins 41 and the circuit board 1. The electrical connector 2 includes a socket 2211 and an elastic conductive part 21. The socket 2211 allows the pins 41 to be inserted into the electrical connector 2, and the elastic conductive part 21 reduces the insertion and extraction force of the pins 41 and maintains contact with them, ensuring a reliable electrical connection between the pins 41 and the electrical connector 2. The end cap 3 is connected to the housing 72 via a first connecting part 311, ensuring the integrity of the pump device 200's appearance. The sleeve 42 of the connector 4 and the circuit board 1 are located on opposite sides of the end cap 3, ensuring that after assembly, the circuit board 1 is located inside the pump device 200, and the sleeve 42 is located outside the pump device 200, thus ensuring that the connector 4 can connect to the female end.

[0116] Furthermore, the number of electrical plugs 2 is equal to the number of pins 41 and corresponds one-to-one. One pin 41 is connected to one electrical plug 2, which helps to improve the connection reliability between the pin 41 and the circuit board 1.

[0117] In one embodiment of this application, the electrical plug-in 2 further includes: a connector 22, such as Figure 6 As shown. Connector 22 is fixedly connected to circuit board 1. Connector 22 is provided with insertion hole 2211.

[0118] The elastic conductive part 21 includes at least one spring piece 211, such as Figure 5 As shown. One end of the spring contact 211 is connected to the connecting seat 22. The other end of the spring contact 211 is formed as a free end, and the free end extends obliquely towards the central axis of the socket 2211, as shown. Figure 6 As shown.

[0119] The electrical connector 2 also includes a connector 22, which is fixedly connected to the circuit board 1 to achieve both mechanical and electrical connections between the electrical connector 2 and the circuit board 1. The connector 22 has a socket 2211 for the insertion of the pin 41 of the connector 4. The elastic conductive part 21 includes at least one spring piece 211. The form of the spring piece 211 helps to increase the contact area between the elastic conductive part 21 and the pin 41, thereby improving the reliability of the electrical connection between the pin 41 and the electrical connector 2.

[0120] One end of the spring contact 211 is connected to the connector 22, ensuring electrical connection between the pin 41, the spring contact 211, the connector 22, and the circuit board 1. The other end of the spring contact 211 is a free end, extending at an angle in the opposite direction to the central axis of the socket 2211. When the pin 41 passes through the socket 2211 and contacts the spring contact 211, it will press the spring contact 211 away from the central axis of the socket 2211. Due to the restoring force of the spring contact 211, the spring contact 211 will maintain good contact with the pin 41, thereby achieving elastic insertion and removal of the pin 41 and the electrical connector 2, and ensuring a reliable connection between the pin 41 and the electrical connector 2.

[0121] In one embodiment of this application, the number of spring pieces 211 is multiple, such as... Figure 3 and Figure 5 As shown. Multiple spring contacts 211 are arranged circumferentially along the insertion hole 2211. The insertion pin 41 contacts the multiple spring contacts 211.

[0122] By designing multiple spring contacts 211 and arranging them circumferentially along the socket 2211, the pin 41 can contact multiple spring contacts 211 after being inserted into the socket 2211, which further increases the contact area between the pin 41 and the elastic conductive part 21, thereby further improving the connection reliability between the pin 41 and the electrical plug 2.

[0123] Meanwhile, the force exerted by the multiple spring clips 211 also helps to balance the upward force on the pin 41, preventing the pin 41 from tilting or shifting, thereby further improving the reliability of the connection between the pin 41 and the electrical connector 2. Before the pin 41 is inserted, the distance between the free ends of the multiple spring clips 211 is relatively small. During the insertion process, the distance between the free ends of the multiple spring clips 211 gradually increases and clamps the pin 41, ensuring reliable fixation of the pin 41.

[0124] In a specific example, the number of shrapnel 211 is two, such as... Figure 6 As shown, the two spring pieces 211 are arranged opposite each other. Compared with the scheme of having more spring pieces 211, the structure of two spring pieces 211 is simpler, easier to process and form, and reduces production costs.

[0125] In one embodiment of this application, such as Figure 3 and Figure 4 As shown, the connector 22 includes at least one solder pad 222 and a bracket 221. The solder pad 222 is soldered and fixed to the circuit board 1. The bracket 221 is connected to the solder pad 222, and the bracket 221 has a socket 2211 connected to one end of a spring clip 211. The bracket 221 also has a clearance space 223 for the spring clip 211 to undergo elastic deformation. Figure 3 As shown.

[0126] The connector 22 includes a bracket 221 and at least one solder pad 222. The solder pad 222 is soldered and fixed to the circuit board 1, realizing a fixed connection and electrical connection between the connector 22 and the circuit board 1. The bracket 221 is connected to the solder pad 222 and the spring contact 211, realizing an electrical connection between the bracket 221 and the solder pad 222 and the spring contact 211. The bracket 221 has a socket 2211 for the insertion of the pin 41, and the bracket 221 has a clearance space 223 to facilitate clearance of the spring contact 211, making the spring contact 211 easier to elastically deform. This helps to further reduce the insertion force of the pin 41, thereby further reducing the assembly difficulty.

[0127] In one specific embodiment, such as Figure 4 , Figure 5 and Figure 6 As shown, the electrical connector 2 can also be called a spring insert. The electrical connector 2 is a sheet metal part with two solder pads 222, which are fixed to the circuit board 1 by soldering. The electrical connector 2 has a socket 2211, and below the socket 2211 are two spring contacts 211, which are close together when not assembled. The pin 41 passes through the socket 2211 and contacts the spring contacts 211. The spring contacts 211 open, and the pin 41 is pressed by the initial preload, achieving electrical connection. This structure eliminates the need for soldering and simplifies assembly. The size of the socket 2211 and the distance between the spring contacts 211 can be flexibly adjusted to accommodate various pins 41 of different lengths and widths.

[0128] In one embodiment of this application, combined with Figure 8 , Figure 9 and Figure 10 As shown, pad 222 is soldered and fixed to the surface of circuit board 1 facing end cover 3. One end of bracket 221 is connected to pad 222. The other end of bracket 221 extends through circuit board 1 to the side of circuit board 1 facing away from end cover 3.

[0129] In this solution, the bracket 221 penetrates the circuit board 1. Since the circuit board 1 has a certain thickness, it is equivalent to forming a reinforcing structure on the outer periphery of the bracket 221. This can support and fix the bracket 221, reduce the risk of the bracket 221 tilting, shifting or deforming, and thus improve the reliability of the electrical plug-in 2.

[0130] In some embodiments of this application, the end cap 3 is a plastic part. The end cap 3 and the connector 4 are an integral structure.

[0131] For products with low heat dissipation requirements, end cap 3 is made of plastic, which can reduce the weight and cost of the product compared to metal parts.

[0132] Meanwhile, the plastic end cap 3 can be integrated with the connector 4 through injection molding, which eliminates the assembly process between the connector 4 and the end cap 3, as well as the sealing structure between the connector 4 and the end cap 3. This simplifies the product structure and assembly process, thereby reducing production and assembly costs.

[0133] In some other embodiments of this application, the end cap 3 is a metal part. The end cap 3 and the connector 4 are separate structures.

[0134] The end cap 3 is made of metal. Since metal has good thermal conductivity, it is conducive to the rapid heat dissipation of the circuit board 1, preventing the temperature of the circuit board 1 from rising too high and improving the reliability of the circuit board 1.

[0135] In one embodiment of this application, further, as Figure 2 As shown, connector 4 also includes a base plate 43. The base plate 43 is connected to the end of sleeve 42 near circuit board 1. The base plate 43 is stacked on end cap 3 and fixedly connected to end cap 3. End cap 3 is provided with mounting holes 33, such as... Figure 2 and Figure 7 As shown. Pin 41 passes through base plate 43 and mounting hole 33 and is inserted into electrical connector 2.

[0136] The connector 4 also includes a base plate 43, which is connected to the end of the sleeve 42 near the circuit board 1. A pin 41 passes through the base plate 43 and is fixedly connected to it, ensuring the integrity of the connector 4. During assembly, the base plate 43 is stacked on the end cover 3 and fixedly connected to it, realizing the connection function between the connector 4 and the end cover 3. The connection method between the base plate 43 and the end cover 3 can be achieved through screw connection, riveting, snap-fit ​​connection, etc.

[0137] Furthermore, connector 4 also includes: positioning post 44, such as Figure 14 As shown. The positioning post 44 is connected to the base plate 43 and is inserted into the mounting hole 33. The pin 41 passes through the positioning post 44 and is fixedly connected to the positioning post 44.

[0138] The connector 4 also includes a positioning post 44, which can be inserted into the assembly hole 33 to play a good positioning role, realize the rapid positioning between the connector 4 and the end cover 3, and thus improve the assembly efficiency.

[0139] In one embodiment of this application, the circuit board assembly structure 100 of the pump device 200 further includes: a first sealing ring 34, such as Figure 14 As shown. The first sealing ring 34 is located between the base plate 43 and the end cap 3, and is arranged circumferentially along the mounting hole 33.

[0140] A first sealing ring 34 is provided between the base plate 43 and the end cover 3 to ensure the sealing reliability between the end cover 3 and the connector 4, and to prevent liquid from entering the pump device 200 through the gap between the end cover 3 and the base plate 43, thereby improving the reliability of the pump device 200.

[0141] Furthermore, a recess 331 is provided at one end of the assembly hole 33 near the base plate 43, such as... Figure 2 As shown. The recess 331 is provided circumferentially along the mounting hole 33. The first sealing ring 34 is partially embedded in the recess 331.

[0142] A groove 331 is provided at one end of the assembly hole 33 near the base plate 43, which facilitates the assembly of the first sealing ring 34 and also limits the first sealing ring 34 to prevent it from shifting, thereby improving the reliability of the first sealing ring 34.

[0143] In one embodiment of this application, the circuit board assembly structure 100 of the pump device 200 further includes: a fixing plate 5, such as... Figure 2 As shown. The fixing plate 5 is located on one side of the circuit board 1. The circuit board 1 is fixed on the fixing plate 5.

[0144] The fixing plate 5 not only fixes the circuit board 1, but also supports it, which helps to prevent the electrical plug 2 from deforming during the insertion and removal of the connector 4, thereby improving the reliability of the insertion and removal of the electrical plug 2 and the connector 4.

[0145] Specifically, the fixing plate 5 includes: a fixing plate body 51 and at least one fixing part 52, such as Figure 11 As shown. The fixing part 52 protrudes from the fixing plate body 51 onto the surface of the circuit board 1. The circuit board 1 has at least one first connection hole 111, as shown. Figure 2 As shown. The fixing part 52 cooperates with the first connecting hole 111 to fix the circuit board 1 to the fixing plate 5.

[0146] The fixing plate 5 includes a fixing plate body 51 and at least one fixing part 52. The fixing plate body 51 is the main part of the fixing plate 5 and can support the circuit board 1. The fixing part 52 cooperates with the first connection hole 111 of the circuit board 1 to fix the circuit board 1 in place and ensure the stability of the circuit board 1.

[0147] Meanwhile, the fixing part 52 protrudes from the fixing plate body 51 on the plate surface facing the circuit board 1, which enables the fixing plate body 51 and the circuit board 1 to have a certain distance, which facilitates the avoidance of components on the circuit board 1, is conducive to the reasonable layout of components on the circuit board 1, and also facilitates the heat dissipation of the circuit board 1.

[0148] The fixing part 52 can be a single part, which simplifies the structure, or it can be multiple parts. When there are multiple fixing parts 52, the multiple fixing parts 52 are arranged circumferentially along the fixing plate body 51, which helps to balance the force on the circuit board 1, thereby improving the fixing reliability of the circuit board 1.

[0149] In a specific example of this application, the fixing part 52 is fixedly connected to the first connecting hole 111 by a fastener 39. The fixing part 52 and the first connecting hole 111 are fixedly connected by fasteners 39 such as screws, which provides high connection strength and reliable fixation.

[0150] In another specific example of this application, the fixing part 52 is riveted to the first connecting hole 111. The riveting of the fixing part 52 to the first connecting hole 111 provides a high connection strength and a relatively secure fixation.

[0151] In yet another specific example of this application, the fixing part 52 includes at least one first snap fastener 521, which engages with the first connecting hole 111.

[0152] The fixing part 52 includes at least one first buckle 521, which passes through the first connecting hole 111 and engages with the circuit board 1. Compared with the screw connection, the assembly method is simpler and faster, which helps to simplify the assembly process and further improve the assembly efficiency.

[0153] The number of first buckles 521 can be one or more, such as two first buckles 521 set back from each other.

[0154] In one embodiment of this application, the fixing plate 5 and the end cap 3 are located on opposite sides of the circuit board 1, as shown below. Figure 2 and Figure 14 As shown. The fixing plate 5 includes a second connecting portion 53. The second connecting portion 53 is used to connect to the housing 72 of the pump device 200, and the fixing plate 5 is provided with a clearance notch 511. The clearance notch 511 is adapted to avoid the motor terminal 71 of the pump device 200 and the components of the circuit board 1.

[0155] In this design, the fixing plate 5 can be connected to the housing 72 of the pump device 200 via the second connecting part 53. Furthermore, the fixing plate 5 is provided with a clearance notch 511, which allows for clearance between the motor terminal 71 of the pump device 200 and components on the surface of the circuit board 1 facing the fixing plate 5. This ensures that the motor terminal 71 of the pump device 200 can pass through the fixing plate 5 and connect to the circuit board 1, while also facilitating a reasonable layout of components on the surface of the circuit board 1 facing the fixing plate 5.

[0156] During assembly, the fixing plate 5 can be connected to the housing 72 first, then the circuit board 1 can be fixed on the fixing plate 5, then the motor terminal 71 can be connected to the circuit board 1, then the assembly formed by the connector 4 and the end cover 3 can be installed, so that the pin 41 of the connector 4 is connected to the electrical connector 2, and then the end cover 3 can be fixedly connected to the housing 72. The assembly method is simple and quick.

[0157] In a specific example of this application, circuit board 1 is provided with solder holes 112, such as Figure 2 As shown. The welding hole 112 is used for the motor terminal 71 of the pump device 200 to be inserted into and welded to the circuit board 1 along the direction from the fixing plate 5 to the circuit board 1, and the clearance notch 511 is set to correspond to the welding hole 112.

[0158] When the circuit board 1 is provided with soldering holes 112, the circuit board 1 can be fixed to the motor terminal 71 by soldering through the soldering holes 112, so as to achieve the soldering connection between the circuit board 1 and the motor terminal 71. The connection strength is high, the fixation is reliable, and the reliability of use is high.

[0159] During assembly, the fixing plate 5 can be connected to the housing 72 first, then the circuit board 1 can be fixed on the fixing plate 5, then the motor terminal 71 can be soldered to the circuit board 1, then the assembly formed by the connector 4 and the end cover 3 can be installed, so that the pin 41 of the connector 4 is connected to the electrical connector 2, and then the end cover 3 can be fixedly connected to the housing 72. The assembly method is simple and quick, which solves the problem in the prior art that the motor and the connector 4 are located on opposite sides of the circuit board 1, making it difficult to solder the motor terminal 71 to the circuit board 1.

[0160] In another specific example of this application (not shown in the figure), there are multiple electrical plugs 2, and a portion of the multiple electrical plugs 2 are used to connect and engage with the motor terminal 71 of the pump device 200.

[0161] The electrical connection between the motor terminal 71 and the circuit board 1 can also be achieved by plugging in the electrical connector 2. In this way, the connection between the circuit board 1 and the motor terminal 71 and the connector 4 is fixed without soldering, which can eliminate the need for soldering equipment on the production line, and achieve flexible plug-and-play fixing between the circuit board 1 and the motor terminal 71, further reducing the assembly difficulty of the circuit board 1 and thus further improving the assembly efficiency.

[0162] In one embodiment of this application, the second connecting portion 53 includes a snap-fit ​​portion, such as... Figure 11 As shown. The snap-fit ​​part is used for snap-fit ​​connection with the housing 72 of the pump assembly 200. The snap-fit ​​part includes at least one second snap 531 (as shown). Figure 12 and Figure 13 (as shown) and / or at least one card slot.

[0163] The fixing plate 5 is engaged with the housing 72 through a snap-fit ​​part, which makes the assembly simple and quick and helps to further improve the assembly efficiency.

[0164] Specifically, when the latching part includes the second latch 531, the housing 72 correspondingly includes a latching groove. When the latching part includes a latching groove, the housing 72 correspondingly includes the second latch 531. When there are multiple second latches 531, the multiple second latches 531 are arranged at intervals along the circumference of the fixing plate 5. This is beneficial to the balanced force between the fixing plate 5 and the housing 72, thereby improving the connection reliability between the fixing plate 5 and the housing 72.

[0165] In one embodiment of this application, the fixing plate 5 further includes at least one positioning portion 54. The positioning portion 54 is used to engage with the housing 72 of the pump assembly 200 for positioning. The positioning portion 54 includes at least one positioning protrusion and / or at least one positioning groove 541 (e.g., Figure 13 (As shown).

[0166] The fixing plate 5 is engaged with the housing 72 through the positioning part 54, which enables the fixing plate 5 to be quickly positioned, plays a role in preventing assembly errors, and helps to further improve assembly efficiency.

[0167] Specifically, when the positioning part 54 includes a positioning protrusion, the housing 72 correspondingly includes a positioning groove 541. When the positioning part 54 includes a positioning groove 541, the housing 72 correspondingly includes a positioning protrusion. When there are multiple positioning parts 54, the multiple positioning parts 54 are arranged at intervals along the circumference of the fixing plate 5, which is also conducive to the balanced force between the fixing plate 5 and the housing 72, thereby improving the connection reliability between the fixing plate 5 and the housing 72.

[0168] In one embodiment of this application, the circuit board 1 further includes a circuit board body 11 and a heat dissipation element 12, such as... Figure 2 As shown. The electrical connector 2 is mounted on the circuit board body 11, and a heat dissipation element 12 is provided on the surface of the circuit board body 11 facing the end cover 3. The circuit board assembly structure 100 of the pump device 200 also includes a heat-conducting structure 13, such as... Figure 14 As shown. The heat-conducting structure 13 is located between the heat dissipation element 12 and the end cap 3, as shown. Figure 14 As shown, it is in contact with the heat dissipation element 12 and the end cover 3, and the end cover 3 is a metal part.

[0169] The circuit board 1 includes a circuit board body 11 and a heat dissipation element 12. The heat dissipation element 12 is provided to facilitate the timely dissipation of heat generated by the circuit board 1, prevent the circuit board 1 from malfunctioning due to excessive temperature rise during use, thereby improving the reliability of the circuit board 1 and thus improving the reliability of the pump device 200.

[0170] A heat-conducting structure 13 is added between the heat dissipation element 12 and the end cover 3. The end cover 3 is made of metal. Since metal and the heat-conducting structure 13 have good thermal conductivity, the heat of the heat dissipation element 12 can be quickly transferred to the end cover 3 through the heat-conducting structure 13, and then dissipated to the outside. This greatly improves the heat dissipation performance of the product and significantly improves the heat dissipation effect.

[0171] Specifically, the end cap 3 can be made of, but is not limited to, aluminum, copper, iron, etc.

[0172] The heat dissipation element 12 includes, but is not limited to, MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors, also known as MOSFETs, which are field-effect transistors that can be widely used in analog and digital circuits), chips, and other components. These components generate a lot of heat during use, so good heat dissipation is required.

[0173] Specifically, the thermally conductive structure 13 includes at least one of thermally conductive adhesive and thermally conductive pad.

[0174] The thermally conductive adhesive is applied by means of a coating, which is simple and inexpensive. Specifically, it can be applied to at least one of the heat dissipation element 12 and the end cap 3, making it convenient to use.

[0175] The thermal pad can also be fixed by adhesive or directly clamped between the heat dissipation element 12 and the end cap 3, which also has the advantages of simple structure, convenient assembly and low cost.

[0176] In one embodiment of this application, the end cap 3 includes: an end cap body 31 and a heat dissipation boss 35, such as Figure 7 As shown. The end cap body 31 includes a first connecting portion 311. A heat dissipation protrusion 35 is provided on the surface of the end cap body 31 facing the circuit board body 11, and is correspondingly provided with the heat dissipation element 12.

[0177] The heat-conducting structure 13 is located between the heat dissipation element 12 and the heat dissipation boss 35, and is in contact with the heat dissipation element 12 and the heat dissipation boss 35.

[0178] The end cover 3 includes an end cover body 31 and a heat dissipation protrusion 35. The end cover body 31 includes a first connecting portion 311, which enables the end cover 3 to be fixedly connected to the housing 72. The heat dissipation protrusion 35 helps to further increase the heat dissipation area of ​​the end cover 3, thereby further improving the heat dissipation effect. At the same time, it also helps to reduce the thickness of the heat-conducting structure 13, simplify the heat-conducting structure 13, and thus reduce the cost of the heat-conducting structure 13.

[0179] Furthermore, the end cap 3 also includes: a positioning boss 32, such as Figure 7 As shown. The positioning boss 32 is provided on the surface of the end cover body 31 facing the circuit board 1 and is adapted to the shape of the housing 72 for embedding into the housing 72.

[0180] Since the positioning boss 32 is compatible with the shape of the housing 72, the positioning boss 32 can be directly embedded into the housing 72 during assembly, so as to achieve relative fixation between the end cover 3 and the housing 72, which plays a good role in assembly positioning and further improves assembly efficiency.

[0181] In one embodiment of this application, the outer wall of the positioning boss 32 is provided with a sealing groove 321 for installing the second sealing ring 36, such as... Figure 7 As shown. The sealing groove 321 is arranged circumferentially along the positioning boss 32.

[0182] A sealing groove 321 is provided on the outer wall of the positioning boss 32, and a second sealing ring 36 is installed at the sealing groove 321. After assembly, the second sealing ring 36 is sandwiched between the outer wall of the positioning boss 32 and the housing 72, providing a radial seal between the housing 72 and the end cover 3. This design helps to reduce the thickness of the end cover body 31, which in turn helps to reduce the axial dimension of the pump device 200.

[0183] Of course, when the thickness of the end cover body 31 and / or the wall thickness of the housing 72 are sufficient, a sealing groove 321 can be provided on the plate surface of the end cover 3 facing the housing 72 and / or on the end surface of the housing 72 facing the end cover 3. After assembly, the second sealing ring 36 can achieve axial sealing between the end cover 3 and the housing 72, and can also ensure the sealing reliability between the end cover 3 and the housing 72.

[0184] In one embodiment of this application, the circuit board assembly structure 100 of the pump device 200 further includes: heat dissipation fins 37, such as... Figure 15 As shown. Heat dissipation fins 37 are provided on the surface of the end cover 3 that is away from the circuit board 1.

[0185] By providing heat dissipation fins 37 on the surface of the end cover 3 away from the circuit board 1, the heat dissipation area of ​​the product can be further increased, thereby further improving the heat dissipation performance of the product.

[0186] In one embodiment of this application, the circuit board 1 further includes: a grounding element 14, such as... Figure 2 As shown. The grounding element 14 is provided on the surface of the circuit board body 11 facing the end cover 3 and is in contact with the end cover 3.

[0187] When the end cap 3 is made of metal, since metal has the function of conducting electricity, when the grounding element 14 of the circuit board 1 is in physical contact with the metal end cap 3, an electrical connection can be achieved, thereby realizing the grounding design of the circuit board 1, improving the electromagnetic interference protection capability of the circuit board 1, thereby improving the electromagnetic compatibility of the product, that is, improving the EMC performance of the product.

[0188] Furthermore, the end cap 3 has a grounding boss 38, such as Figure 2 As shown. Grounding element 14 is in contact with grounding boss 38. Grounding element 14 can be, but is not limited to, grounding spring.

[0189] In one embodiment of this application, such as Figure 2 As shown, the first connecting part 311 includes a second connecting hole 3111, through which the fastener 39 passes, so that the end cover 3 is fixedly connected to the housing 72 by the fastener 39.

[0190] A second connecting hole 3111 is provided on the end cover 3. During assembly, the end cover 3 and the housing 72 can be fixedly connected by fasteners such as screws 39. The structure is simple and the fixation is reliable.

[0191] Furthermore, there are multiple second connecting holes 3111, which are spaced apart along the circumference of the end cover 3. In this way, the end cover 3 and the fixing plate 5 are fixedly connected by multiple fasteners 39, making the connection more reliable.

[0192] like Figure 15 and Figure 16 As shown, a pump device 200 provided in an embodiment of the second aspect of this application includes: a pump section 6, a motor section 7, and a circuit board assembly structure 100 of the pump device 200 as described in any of the embodiments of the first aspect.

[0193] Specifically, the pump section 6 is provided with an inlet 61 and an outlet 62. The motor section 7 is connected to the pump section 6, and the motor section 7 includes a housing 72 and a motor terminal 71. The end cover 3 of the circuit board assembly structure 100 is connected to the housing 72 via a first connecting part 311. The motor terminal 71 is electrically connected to the circuit board 1 of the circuit board assembly structure 100.

[0194] The pump device 200 provided in the second aspect of this application, since it includes the circuit board assembly structure 100 of any of the embodiments in the first aspect, has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0195] In one embodiment of this application, the housing 72 includes at least one snap-fit ​​portion 720, such as... Figure 15 As shown. The snap-fit ​​part 720 is used to snap-fit ​​with the snap-fit ​​part of the circuit board assembly structure 100.

[0196] The snap-fit ​​part 720 of the housing 72 is correspondingly set with the snap-fit ​​part of the fixing plate 5 to realize the snap-fit ​​fixation of the housing 72 and the fixing plate 5. The assembly is simple and quick, which helps to improve the assembly efficiency.

[0197] Specifically, when the snap-fit ​​portion includes the second snap 531, the snap-fit ​​mating portion 720 correspondingly includes a snap groove. When the snap-fit ​​portion includes a snap groove, the snap-fit ​​mating portion 720 correspondingly includes the second snap 531.

[0198] In one embodiment of this application, the housing 72 is a metal part.

[0199] The casing 72 is made of metal, which has good thermal conductivity and is therefore beneficial for heat dissipation.

[0200] Furthermore, when the end cover 3 is made of metal, and the end cover 3 is in contact with the grounding element 14 of the circuit board 1, and the end cover 3 is fixedly connected to the housing 72 by conductive screws, then the end cover 3 can achieve conductivity through the conductive screws and the metal housing 72; or the end cover 3 is directly connected to the housing 72, then the end cover 3 can directly achieve conductivity with the metal housing 72. In this way, the housing 72 and the grounding element 14 of the circuit board 1 are also indirectly electrically connected, realizing the grounding design, thereby further improving the electromagnetic compatibility of the product, that is, further improving the EMC performance of the product.

[0201] The casing 72 can be made of materials such as, but are not limited to, aluminum, copper, iron, etc.

[0202] The end cap 3 can also be made of, but is not limited to, aluminum, copper, iron, etc.

[0203] In some embodiments, the pump assembly 200 is an oil pump, and the medium flowing inside is liquid oil. The housing 72 contains a pump chamber and a motor chamber, which are separated by an oil seal 76. Figure 15 As shown, the motor unit 7 includes a stator assembly 74, a rotor assembly 73, and a shaft 75. The stator assembly 74 and the rotor assembly 73 are located in the motor housing, and the coils of the stator assembly 74 are electrically connected to the motor terminals 71.

[0204] like Figure 17 and Figure 19 As shown, the pump unit 6 includes a pump cover 65 and an internal gear 63 and an external gear 64 disposed within the pump chamber. The pump cover 65 is provided with the aforementioned inlet 61 and outlet 62. A rotating shaft 75 extends from the motor chamber to the pump chamber and is coaxially connected to the internal gear 63. The external gear 64 is sleeved on the outside of the internal gear 63 and is eccentrically positioned relative to the internal gear 63. The rotating shaft 75 drives the internal gear 63 to rotate, and the internal gear 63 drives the external gear 64 to rotate.

[0205] An oil chamber is formed between the external gear 64 and the internal gear 63. This oil chamber includes a first pressure chamber 66 connected to the input port 61 and a second pressure chamber 67 connected to the output port 62. The oil pressure in the first pressure chamber 66 is lower than that in the second pressure chamber 67; therefore, the first pressure chamber 66 and the second pressure chamber 67 can be referred to as the low-pressure chamber and the high-pressure chamber, respectively. As the internal gear 63 and the external gear 64 rotate, a negative pressure is generated at the oil suction port, causing the first pressure chamber 66 to draw oil in, and the second pressure chamber 67 to discharge oil from the output port 62 using the pressure difference.

[0206] Furthermore, such as Figure 12 and Figure 14 As shown, the housing 72 has a first bearing portion 725, and the pump cover 65 has a second bearing portion 657. The rotating shaft 75 passes through the first bearing portion 725 and the second bearing portion 657, and is clearance-fitted with the first bearing portion 725 and the second bearing portion 657. In this way, by using the first bearing portion 725 and the second bearing portion 657 as sliding bearings, the rotating shaft 75 is double-supported, which helps to improve the positional stability of the rotating shaft 75. Furthermore, the rolling bearing is eliminated, simplifying the structure of the pump device 200 and reducing the production cost of the product.

[0207] Furthermore, a first lubricating oil passage is provided inside the housing 72. The two ends of the first lubricating oil passage are connected to the first pressure chamber 66 and the second pressure chamber 67 respectively, so that the oil in the second pressure chamber 67 can flow into the first pressure chamber 66 through the first lubrication flow path to achieve lubrication between the first bearing part 725 and the rotating shaft 75.

[0208] The first bearing section 725 is lubricated by the first lubrication flow path, so that a lubricating film can be formed between the first bearing section 725 and the rotating shaft 75, which effectively reduces the friction and wear between the first bearing section 725 and the rotating shaft 75, which is beneficial to reducing the energy consumption of the product and extending the service life of the product.

[0209] Specifically, such as Figure 12 and Figure 14 As shown, the first lubrication circuit includes a first throttling groove 721, a first lubrication groove 722, a first flow groove 723, and a pressure relief hole 724. One end of the first throttling groove 721 is connected to the second pressure chamber 67, and the other end extends to the inner wall of the first bearing portion 725. The first lubrication groove 722 is formed on the inner wall of the first bearing portion 725 and communicates with the first throttling groove 721. The first flow groove 723 is located between the first bearing portion 725 and the oil seal 76, and is arranged circumferentially along the shaft 75. The pressure relief hole 724 is located on the housing 72, and its two ends are connected to the first flow groove 723 and the first pressure chamber 66, respectively.

[0210] During operation, some oil in the second pressure chamber 67 enters the first bearing section 725 through the first throttling groove 721, then enters the first flow groove 723 along the first lubrication groove 722, and then enters the pressure relief hole 724 along the first flow groove 723, before entering the first pressure chamber 66 through the pressure relief hole 724. Meanwhile, the oil in the first pressure chamber 66 can enter the second pressure chamber 67 with the rotation of the internal gear 63 and the external gear 64, and then be discharged through the output port 62. In this way, an oil circulation circuit is formed.

[0211] The first throttling groove 721 and the pressure relief hole 724 are both located on the first bearing portion 725. They can be directly set by slotting and opening the first bearing portion 725, resulting in a simple structure and eliminating the need for additional sealing. Furthermore, the end face of the first bearing portion 725 furthest from the oil seal 76 directly faces the pump cavity. Therefore, setting the first throttling groove 721 on this end face simplifies the structure of the first throttling groove 721 compared to setting it inside the first bearing portion 725, thereby reducing the difficulty of machining.

[0212] Furthermore, there is a gap between the oil seal 76 and the first bearing portion 725, which forms at least a portion of the first flow groove 723.

[0213] By utilizing the gap between the oil seal 76 and the first bearing portion 725 to form at least a portion of the first flow groove 723, it is possible to avoid slotting on the first bearing portion 725, thereby simplifying the structure of the first bearing portion 725 and facilitating its processing and forming. Furthermore, it is beneficial to increase the flow area of ​​the first flow groove 723, which not only improves the flow effect of the lubricating medium in the first lubrication flow path, thereby improving the lubrication effect, but also helps to reduce the pressure on the oil seal 76, thereby reducing the risk of oil seal 76 failure.

[0214] Furthermore, the oil seal 76 has a flow channel at one end facing the first bearing portion 725, which forms at least a portion of the first flow groove 723.

[0215] By utilizing the flow channel on the oil seal 76 to form at least a portion of the first flow groove 723, it is possible to avoid slotting on the first bearing portion 725, thereby simplifying the structure of the first bearing portion 725 and facilitating its processing and forming. Furthermore, it is beneficial to increase the flow area of ​​the first flow groove 723, which not only improves the flow effect of the lubricating medium in the first lubrication flow path, thereby improving the lubrication effect, but also helps to reduce the pressure on the oil seal 76, thereby reducing the risk of oil seal 76 failure.

[0216] Furthermore, the first bearing portion 725 has a pressure relief cavity 726 on its end face facing the oil seal 76, such as... Figure 19 As shown.

[0217] A pressure relief cavity 726 is provided on the end face of the first bearing portion 725 facing the oil seal 76. On the one hand, it can further reduce the pressure on the oil seal 76, thereby further reducing the risk of oil seal 76 failure. On the other hand, during the rotation of the shaft 75, the setting of the pressure relief cavity 726 allows the first bearing portion 725 to undergo a certain degree of flexible deformation, thereby providing a certain degree of flexible support for the shaft 75 and reducing friction and wear between the shaft 75 and the first bearing portion 725.

[0218] In one embodiment, further, such as Figure 17 and Figure 18 As shown, the pump cover 65 is provided with a second lubrication oil passage for supplying oil between the second bearing section 657 and the rotating shaft 75, thereby lubricating the second bearing section 657 and the rotating shaft 75. The two ends of the second bearing section 657 are open, and the end of the second bearing section 657 away from the internal gear 63 is connected to the oil reservoir 306.

[0219] Specifically, the second lubrication circuit includes a second lubrication groove 651 and a thrust lubrication groove 652. The second lubrication groove 651 is located on the inner wall of the second bearing portion 657, and the thrust lubrication groove 652 is located on the end face of the second bearing portion 657 facing the internal gear 63. The thrust lubrication groove 652 is connected to the first lubrication groove 722 and the first pressure chamber 66.

[0220] During operation, the oil in the oil reservoir 306 is divided into two paths. One path enters the first pressure chamber 66 through the inlet 61, then the second pressure chamber 67, and is discharged through the outlet 62. The other path enters the second bearing section 657 through the second lubrication groove 651, then the thrust lubrication groove 652, and then the first pressure chamber 66. The oil in the first pressure chamber 66 then enters the second pressure chamber 67, and is discharged through the outlet 62. Simultaneously, the oil in the thrust lubrication groove 652 provides a certain degree of reverse support to the second bearing section 657 and the internal gear 63, preventing excessive friction between them.

[0221] In another embodiment, such as Figure 19 and Figure 20As shown, the end of the second bearing portion 657 away from the internal gear 63 can also be a closed design. In this case, the second lubrication circuit includes a throttling orifice 653, an oil sump 656, a second lubrication groove 651, a second flow groove 654, and a second throttling groove 655. One end of the throttling orifice 653 is connected to the output port 62, and the other end extends into the second bearing portion 657. The oil sump 656 is located inside the second bearing portion 657 and is a certain distance away from the end face of the rotating shaft 75. The second lubrication groove 651 is provided on the inner wall surface of the second bearing portion 657. The second flow groove 654 is provided at the open end of the second bearing portion 657 and is arranged circumferentially along the rotating shaft 75, specifically as a chamfer at the open end of the second bearing portion 657. The second throttling groove 655 is provided on the end face of the second bearing portion 657 facing the internal gear 63, with one end connected to the second flow groove 654 and the other end connected to the input port 61.

[0222] During use, the oil at the output port 62 enters the oil sump 656 through the throttling hole 653, then enters the second lubrication groove 651 through the oil sump 656, then enters the second flow groove 654 through the second lubrication groove 651, then enters the input port 61 through the second throttling groove 655, and enters the first pressure chamber 66 along with the oil at the input port 61, then enters the second pressure chamber 67, and finally is discharged through the output port 62.

[0223] The second bearing portion 657 serves as a sliding bearing to support the rotating shaft 75 of the pump assembly 200. The second bearing portion 657 is designed as a blind hole, allowing the end of the rotating shaft 75 inserted into the pump cover 65 to be sealed, thus preventing lubricating media (which can be, but is not limited to, machine oil, water-based liquids, mineral oil, vegetable oil, etc.) from flowing out along the rotating shaft 75 and causing leakage, thereby improving pump efficiency. Simultaneously, the second lubrication path lubricates the second bearing portion 657, forming a lubricating film between it and the rotating shaft 75. This effectively reduces friction and wear between the two, contributing to lower energy consumption and extended product lifespan.

[0224] Meanwhile, the second bearing part 657 allows the rotating shaft 75 to be directly inserted into the pump cover 65, which acts as a positioning pin to limit the pump cover 65 and prevent the pump cover 65 from swaying left and right during the operation of the pump device 200. This eliminates the need for additional positioning pins, simplifies the structure of the pump cover 65, and also simplifies the connection structure between the pump cover 65 and other components (such as the housing).

[0225] Moreover, since the second lubrication flow path utilizes the pressure difference to achieve the circulation of the lubricating medium, it realizes active lubrication of the second bearing section 657, resulting in a better lubrication effect.

[0226] The throttling orifice 653 and the second throttling groove 655 serve to throttle and reduce pressure, facilitating the smooth flow of lubricating medium from the outlet 62 into the second bearing section 657 via the throttling orifice 653, and also facilitating the smooth flow of lubricating medium within the second bearing section 657 to the inlet 61 via the second throttling groove 655. This improves the fluidity of the lubricating medium within the second lubrication path and further enhances the lubrication effect. Furthermore, since both the throttling orifice 653 and the second throttling groove 655 are located on the second bearing section 657, they can be directly installed by creating slots or openings in the second bearing section 657, resulting in a simple structure that requires no additional sealing.

[0227] Furthermore, the second lubrication groove 651 extends to both ends of the second bearing portion 657, which can guide the lubricating medium in the second bearing portion 657 in the axial direction, so that the lubricating medium in the second bearing portion 657 can quickly extend along the second lubrication groove 651 to both ends of the second bearing portion 657 in the axial direction, thereby extending the axial length of the lubricating film, improving the uniformity of the lubricating film in the axial direction, and further improving the lubrication effect on the second bearing portion 657.

[0228] Furthermore, the second flow groove 654 is arranged circumferentially along the second bearing portion 657 and has an annular structure, which can guide the lubricating medium in the second bearing portion 657 in the circumferential direction, so that the lubricating medium in the second bearing portion 657 can quickly flow around the inner wall of the second bearing portion 657 along the second flow groove 654, improve the uniformity of the lubricating film in the circumferential direction, and further improve the lubrication effect on the second bearing portion 657.

[0229] Furthermore, by placing the second flow groove 654 at the open end of the second bearing portion 657, one end of the second lubrication groove 651 also extends to the open end of the second bearing portion 657, ensuring communication with the second flow groove 654. This facilitates extending the length of the second lubrication groove 651, thereby further improving the lubrication effect. Correspondingly, the second throttling groove 655 is placed on the end face of the open end of the second bearing portion 657, facilitating communication between the second flow groove 654 and the second throttling groove 655. Simultaneously, the space at the open end of the second bearing portion 657 is relatively large, significantly reducing the machining difficulty of the second flow groove 654 and the second throttling groove 655 compared to the solution of opening a hole inside the second bearing portion 657, thus facilitating machining and forming.

[0230] Specifically, the second lubrication groove 651 is arranged along the axial direction of the second bearing portion 657, and the second throttling groove 655 is arranged along the radial direction of the second bearing portion 657.

[0231] The second lubrication groove 651 is arranged along the axial direction of the second bearing portion 657 and has a straight structure. Compared with the inclined arrangement, it is easier to process and shorter in length, thus facilitating processing and forming, thereby simplifying the processing technology and reducing production costs.

[0232] The second throttling groove 655 is arranged radially along the second bearing portion 657 and has a straight structure. Compared with inclined or curved arrangements, it is easier to process and shorter in length, thus facilitating processing and reducing production costs. Of course, the second lubrication groove 651 can also be in a non-linear shape.

[0233] Furthermore, the minimum radial distance between the second lubrication groove 651 and the output port 62 is less than the minimum radial distance between the second lubrication groove 651 and the input port 61.

[0234] The minimum radial distance between the second lubrication groove 651 and the output port 62 refers to the minimum radial distance between the edge of the second lubrication groove 651 and the edge of the output port 62 along the second bearing portion 657. The minimum radial distance between the second lubrication groove 651 and the input port 61 refers to the minimum radial distance between the edge of the second lubrication groove 651 and the edge of the input port 61 along the second bearing portion 657.

[0235] When the minimum radial distance between the second lubrication groove 651 and the output port 62 is less than the minimum radial distance between the second lubrication groove 651 and the input port 61, it indicates that the second lubrication groove 651 is closer to the output port 62 and farther from the input port 61. In other words, the second lubrication groove 651 is located on the side closer to the output port 62, i.e., on the high-pressure side of the pump cover 65. During the rotation of the shaft 75, affected by the liquid pressure inside the pump cover 65, the shaft 75 will be relatively biased towards the low-pressure side of the pump cover 65, making the part of the second bearing portion 657 closer to the input port 61 the main pressure-bearing area. Therefore, arranging the second lubrication groove 651 on the high-pressure side of the pump cover 65 avoids the pressure-bearing area of ​​the second bearing portion 657, has less impact on the rigidity of the second bearing portion 657, and is beneficial to improving the reliability of the second bearing portion 657. In addition, this also facilitates the use of the pressure difference between the second lubrication groove 651 and the input port 61 to improve the flow effect of the lubricating medium in the second bearing portion 657, thereby further improving the lubrication effect.

[0236] It is worth noting that, in this application, the medium flowing within the pump device 200 is not necessarily liquid oil; it can also be water-based liquid or other liquid media. Furthermore, the specific installation direction of the pump device 200 depends on the product structure.

[0237] For example, after the pump unit 200 is assembled with the mounting carrier, it may be aligned with the vertical direction shown in the attached drawing, i.e., the motor unit 7 is at the bottom and the pump unit 6 is at the top; or it may be installed upside down, which is exactly the opposite of the vertical direction shown in the attached drawing, i.e., the motor unit 7 is at the top and the pump unit 6 is at the bottom.

[0238] like Figure 21 As shown, an embodiment of the third aspect of this application provides a vehicle 300, including a vehicle body 302 and a pump device 200 as described in any of the embodiments of the second aspect.

[0239] The pump device 200 is mounted on the vehicle body 302.

[0240] The vehicle 300 provided in the third aspect of this application, having included the pump device 200 of any of the embodiments in the second aspect, has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0241] Specifically, the housing 72 has a connecting lug, and the body 302 has a fixing hole; the connecting lug and the fixing hole are fixedly connected by fasteners 39. For example... Figure 22 As shown, the vehicle body 302 includes a drive unit 304 and an oil reservoir 306. The pump unit 6 is provided with an inlet 61 and an outlet 62. The inlet 61 communicates with the oil reservoir 306, and the outlet 62 is used to provide a cooling medium (such as cooling oil) to the drive unit 304.

[0242] It is worth noting that vehicle 300 can be either a traditional gasoline-powered vehicle or a new energy vehicle.

[0243] New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0244] When vehicle 300 is a traditional gasoline-powered vehicle, drive component 304 is a gasoline engine. When vehicle 300 is a new energy vehicle, drive component 304 is a drive motor.

[0245] It is understood that, in this application, the pump device 200 is not necessarily used in vehicles, but can also be used in other products that require the pump device 200. Therefore, the mounting carrier of the pump device 200 is not limited to the vehicle body 302. Furthermore, the specific mounting direction of the pump device 200 depends on the product structure.

[0246] For example, after the pump unit 200 is assembled with the mounting carrier, it may be aligned with the vertical direction shown in the attached drawing, i.e., the motor unit 7 is at the bottom and the pump unit 6 is at the top; or it may be installed upside down, which is exactly the opposite of the vertical direction shown in the attached drawing, i.e., the motor unit 7 is at the top and the pump unit 6 is at the bottom.

[0247] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; "link" can mean a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0248] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0249] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0250] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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. A circuit board assembly structure for a pump device, characterized in that, include: Circuit board; At least one electrical plug-in is disposed on the circuit board and electrically connected to the circuit board, the electrical plug-in including a socket and an elastic conductive part; An end cap, the end cap including a first connecting portion for connecting to the housing of the pump device; A connector, comprising a pin and a sleeve sleeved on the outside of the pin, the sleeve and the circuit board being located on opposite sides of the end cap, the pin passing through the end cap and engaging with the socket and contacting the elastic conductive part; A fixing plate is located on one side of the circuit board, and the circuit board is fixed on the fixing plate; The fixing plate further includes at least one positioning part, which is used to engage with the housing of the pump device to achieve positioning. The positioning part includes at least one positioning protrusion and / or at least one positioning groove. There are multiple positioning parts, and the multiple positioning parts are arranged at intervals along the circumference of the fixing plate. The fixing plate also includes: Fixed plate body; and At least one fixing part protrudes from the fixing plate body on the surface of the plate facing the circuit board, and there is a gap between the fixing plate body and the circuit board; The circuit board is provided with at least one first connection hole, and the fixing part cooperates with the first connection hole to fix the circuit board to the fixing plate. The fixing part is fixedly connected to the first connecting hole by fasteners; The fixing plate and the end cap are located on opposite sides of the circuit board. The fixing plate also includes a second connecting part for connecting the housing of the pump device. The fixing plate is provided with a clearance notch, which is adapted to avoid the motor terminals of the pump device and the components of the circuit board. The circuit board is provided with soldering holes for the motor terminals of the pump device to be inserted and soldered to the circuit board along the direction from the fixing plate to the circuit board. The clearance notch is provided corresponding to the soldering holes; or The number of electrical plugs is multiple, and a portion of the multiple electrical plugs are used for plugging and mating with the motor terminals of the pump device.

2. The circuit board assembly structure of the pump device according to claim 1, characterized in that, The electrical connector also includes: A connector is fixedly connected to the circuit board. The connector has the socket. The elastic conductive part includes at least one spring piece. One end of the spring piece is connected to the connector. The other end of the spring piece is formed as a free end, and the free end extends obliquely toward the central axis of the socket.

3. The circuit board assembly structure of the pump device according to claim 2, characterized in that, The number of spring pieces is multiple, and the multiple spring pieces are arranged circumferentially along the insertion hole, and the insertion pin contacts the multiple spring pieces.

4. The circuit board assembly structure of the pump device according to claim 2, characterized in that, The connector includes: At least one solder pad, said solder pad being soldered and fixed to the circuit board; and The bracket is connected to the pad, the bracket has the insertion hole and is connected to one end of the spring, and the bracket has a clearance space for the spring to undergo elastic deformation.

5. The circuit board assembly structure of the pump device according to claim 4, characterized in that, The pads are soldered and fixed to the surface of the circuit board facing the end cap. One end of the bracket is connected to the pads, and the other end of the bracket extends through the circuit board to the side of the circuit board facing away from the end cap.

6. The circuit board assembly structure of the pump device according to any one of claims 1 to 5, characterized in that, The end cap is made of plastic, and the end cap and the connector are an integral structure.

7. The circuit board assembly structure of the pump device according to any one of claims 1 to 5, characterized in that, The end cap is a metal part, and the end cap and the connector are separate structures.

8. The circuit board assembly structure of the pump device according to claim 7, characterized in that, The connector also includes: A base plate is connected to one end of the sleeve near the circuit board. The base plate is stacked on the end cap and fixedly connected to the end cap. The end cap has an assembly hole. The pin passes through the base plate and the assembly hole and is inserted into the electrical connector.

9. The circuit board assembly structure of the pump device according to claim 8, characterized in that, The connector also includes: A positioning post is connected to the base plate and inserted into the assembly hole. A pin passes through the positioning post and is fixedly connected to the positioning post.

10. The circuit board assembly structure of the pump device according to claim 8, characterized in that, Also includes: A first sealing ring is disposed between the base plate and the end cap, and is arranged circumferentially along the assembly hole.

11. The circuit board assembly structure of the pump device according to claim 10, characterized in that, A recess is provided at one end of the assembly hole near the base plate. The recess is arranged circumferentially along the assembly hole, and a portion of the first sealing ring is embedded in the recess.

12. The circuit board assembly structure of the pump device according to any one of claims 1 to 5, characterized in that, The second connecting part includes a snap-fit ​​part for snapping into the housing of the pump device, the snap-fit ​​part including at least one second snap and / or at least one slot.

13. The circuit board assembly structure of the pump device according to any one of claims 1 to 5, characterized in that, The circuit board includes a circuit board body and a heat dissipation element. The electrical plug is disposed on the circuit board body, and the heat dissipation element is disposed on the surface of the circuit board body facing the end cover. The circuit board assembly structure of the pump device also includes a heat-conducting structure, which is disposed between the heat dissipation element and the end cover and is in contact with the heat dissipation element and the end cover, and the end cover is a metal part.

14. The circuit board assembly structure of the pump device according to claim 13, characterized in that, The thermally conductive structure includes at least one of thermally conductive adhesive and thermally conductive pad.

15. The circuit board assembly structure of the pump device according to claim 13, characterized in that, The end cap includes: End cap body, the end cap body including the first connecting portion; and A heat dissipation protrusion is provided on the surface of the end cover body facing the circuit board body and is correspondingly provided with the heat dissipation element; The heat-conducting structure is disposed between the heat dissipation element and the heat dissipation boss, and is in contact with the heat dissipation element and the heat dissipation boss.

16. The circuit board assembly structure of the pump device according to claim 15, characterized in that, The end cap also includes: A positioning boss is provided on the surface of the end cover body facing the circuit board and is adapted to the shape of the housing for embedding inside the housing.

17. The circuit board assembly structure of the pump device according to claim 16, characterized in that, The outer wall of the positioning boss is provided with a sealing groove for installing a second sealing ring, and the sealing groove is arranged along the circumference of the positioning boss.

18. The circuit board assembly structure of the pump device according to claim 13, characterized in that, Also includes: Heat dissipation fins are disposed on the surface of the end cover opposite to the circuit board.

19. The circuit board assembly structure of the pump device according to claim 13, characterized in that, The circuit board also includes: A grounding element is disposed on the surface of the circuit board body facing the end cover and is in contact with the end cover.

20. The circuit board assembly structure of the pump device according to any one of claims 1 to 5, characterized in that, The first connecting portion includes a second connecting hole through which a fastener passes, so that the end cap is fixedly connected to the housing by the fastener.

21. The circuit board assembly structure of the pump device according to claim 1, characterized in that, The fixing part is riveted and fixed to the first connecting hole; or The fixing part includes at least one first buckle, which engages with the first connecting hole.

22. A pump device, characterized in that, include: The pump unit is provided with an inlet and an outlet; The motor unit is connected to the pump unit, and the motor unit includes a housing and motor terminals; and According to any one of claims 1 to 21, the circuit board assembly structure of the pump device is wherein the end cover of the circuit board assembly structure is connected to the housing via a first connecting portion, and the motor terminal is electrically connected to the circuit board of the circuit board assembly structure.

23. The pump device according to claim 22, characterized in that, The housing includes at least one snap-fit ​​part, which is used to snap-fit ​​with the snap-fit ​​part of the circuit board assembly structure.

24. The pump device according to claim 22 or 23, characterized in that, The casing is made of metal.

25. A vehicle, characterized in that, include: Vehicle body; and The pump device as described in any one of claims 22 to 24, wherein the pump device is mounted on the vehicle body.

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