AC / DC integrated charging socket

Abstract

This invention discloses an AC / DC integrated charging socket. A DC cavity is formed on the DC housing, and a DC terminal assembly is installed within the DC cavity. An axial positioning ring of the DC terminal assembly abuts between the DC housing and the DC tail cover. A grounding through hole is formed on the DC housing, and a grounding terminal assembly is installed within the grounding through hole. An AC cavity is formed on the AC housing, and an AC terminal assembly is installed within the AC cavity. A plug-in box is also provided on both the DC and AC tail covers, and a low-voltage plug-in module is installed on the plug-in box. The advantages of this invention are: the AC terminal assembly, low-voltage plug-in module, grounding terminal assembly, and DC terminal assembly are modularly designed, and each module can be assembled independently. They can be quickly assembled through standardized interfaces, thus solving the problems of high cost, low efficiency, and large quality fluctuations in traditional charging sockets. The axial positioning ring simplifies the structure of the DC terminal, making it easier to manufacture, saving raw materials, and reducing production costs.

Description

Technical Field

[0001] This invention relates to charging sockets for new energy vehicles, and in particular to an AC / DC integrated charging socket. Background Technology

[0002] With the rapid development of the new energy vehicle market, industry competition has become increasingly fierce, and price wars have led to a significant increase in the demand for cost control of components. Traditional charging sockets have the following problems:

[0003] 1) The structure is complex, the automation rate is low, and the production efficiency is limited;

[0004] 2) Key components (such as terminals and panels) have high material costs and complex manufacturing processes;

[0005] 3) Insufficient quality stability and low precision of key dimensions;

[0006] 4) Low integration and poor compatibility;

[0007] Therefore, there is an urgent need for an AC / DC integrated charging socket that combines low cost, high efficiency, and high reliability. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide an AC / DC integrated charging socket.

[0009] The objective of this invention is achieved through the following technical solution: An AC / DC integrated charging socket includes a panel, a DC housing, a DC tail cover, an AC housing, and an AC tail cover. The DC housing is fastened to the panel, and the DC tail cover is fastened to the DC housing. A DC PCB board is also installed on the rear end face of the DC housing. The DC housing also has several mounting through holes, in which AC / DC signal terminals are installed. The AC / DC signal terminals are inserted into corresponding contacts on the DC PCB board. The AC housing is fastened to the panel and is located on one side of the DC housing. The AC tail cover is fastened to the AC housing. An AC PCB board is installed on the rear end face of the AC housing. The AC housing also has several signal terminal holes, in which AC signal terminals are installed. The AC signal terminals are inserted into corresponding contacts on the AC PCB board. The DC housing has a DC cavity, in which a DC terminal assembly is installed. The axial positioning ring of the DC terminal assembly rests between the DC housing and the DC tail cover.

[0010] The DC terminal assembly includes a DC terminal, a through spring is installed in the inner cavity of the front end of the DC terminal, and a first annular groove, a second annular groove and a third annular groove are opened on the DC terminal from front to back. An elastic positioning ring is installed in the first annular groove, a DC sealing ring is installed in the second annular groove, and an axial positioning ring is installed in the third annular groove.

[0011] A grounding through hole is provided on the DC housing, and a grounding terminal assembly is installed in the grounding through hole. The grounding terminal assembly includes a grounding terminal and an elastic positioning ring. The elastic positioning ring includes an annular ring, and multiple elastic compression springs are evenly distributed on the same circumference on the annular ring. The elastic compression springs contract inward, and the spring part of the elastic compression spring abuts against the outer circumference of the grounding terminal. A through hole is provided on the DC PCB board through which the grounding terminal passes, and the elastic compression spring is fixedly connected to the DC PCB board.

[0012] The AC housing also has an AC cavity, and an AC terminal assembly is installed inside the AC cavity. The AC terminal assembly includes an AC terminal, and the head of the AC terminal is provided with a plug. The plug is fitted inside the stainless steel housing, and the relative position of the plug and the stainless steel housing is fixed. The outer wall of the stainless steel housing is provided with outwardly extending anti-reverse teeth. The anti-reverse teeth extend backward. The middle of the AC terminal is also provided with a rubber sealing ring. The tail of the AC terminal is also provided with a core wire connection section. The core wire connection section is provided with a core wire, and a rubber waterproof plug is fitted on the core wire. The head of the rubber waterproof plug is provided with a fixing head. The tail of the core wire connection section is provided with a clamping tooth that clamps the fixing head. The inner wall of the AC cavity is provided with an anti-reverse groove. The rear end face of the anti-reverse teeth on the AC terminal assembly abuts against the rear end face of the anti-reverse groove, and the front end face of the stainless steel housing abuts against the stepped surface inside the front cavity of the AC cavity.

[0013] Both the DC and AC tail covers are equipped with plug-in boxes, on which low-voltage plug-in modules are installed. The low-voltage plug-in modules on the DC tail cover are plugged into the DC PCB board, and the low-voltage plug-in modules on the AC tail cover are plugged into the AC PCB board.

[0014] Optionally, the axial positioning ring includes two semicircular rings. The inner diameter of the semicircular rings matches the diameter of the third annular groove. A locking buckle is provided on one end face of the semicircular ring, and a locking hole is provided on the other end face of the semicircular ring. After the two semicircular rings are fastened together, the locking buckle is fastened in the corresponding locking hole.

[0015] Optionally, a positioning post is provided on one snap-fit ​​end face of the semicircular ring, and a positioning hole is provided on the other snap-fit ​​end face of the semicircular ring. The positioning post is inserted into the corresponding positioning hole. The DC terminal located at the third annular groove is also provided with a positioning notch. A boss is provided on the front end face of the semicircular ring, and the boss is located in the positioning notch.

[0016] Optionally, the DC tail cover is provided with a through hole to facilitate the passage of terminal cables. The front end of the through hole is provided with several inwardly contracting inner spring pieces, and the several inner spring pieces are distributed on the same circumference. The inner spring pieces abut against the rear end face of the axial positioning ring.

[0017] Optionally, the inner wall of the DC cavity is also provided with protruding ridges distributed on the same circumference, and the rear sidewall of the protruding ridges is a wedge-shaped surface.

[0018] Optionally, the elastic positioning ring has a rectangular structure, and each of the four side walls of the elastic positioning ring is provided with an elastic compression spring. Each of the four side walls of the elastic positioning ring is provided with multiple protrusions. A soldering pin is provided on the rear end face of the elastic compression spring. A soldering hole is provided on the DC PCB board, and the soldering pin is soldered into the soldering hole.

[0019] Optionally, the head of the stainless steel housing is provided with a backward-bending limiting claw, the head of the AC terminal is locked in the limiting claw, and the tail of the stainless steel rod housing is provided with a riveting hole, and the AC terminal is provided with a riveting tooth riveted into the riveting hole.

[0020] Optionally, the low-voltage plug-in module includes conductive terminals and a low-voltage housing. The conductive terminals are sealed and installed inside the low-voltage housing. The inner cavity of the plug-in box is provided with a second mounting platform, and the outer wall of the plug-in box is provided with a first mounting platform. The low-voltage housing has a first step and a second step, with the first step located above the second step. The first step is provided with a first latch extending toward the plug-in box, and the second step is provided with a second latch extending toward the plug-in box. When the low-voltage housing is inserted into the plug-in box, the first latch engages with the first mounting platform, and the second latch engages with the second mounting platform.

[0021] Optionally, a notch is provided on the outer wall of the plug box, and the top of the notch forms a first mounting platform. The first latch includes a first spring arm and a first latch part, with the first latch part located inside the first spring arm. The second latch includes a second spring arm and a second latch part, with the second latch part located outside the second spring arm. The outer wall of the second spring arm is an inclined wall. The top surface of the second mounting platform is a wedge-shaped surface. The stepped surface of the second mounting platform is a first inclined surface. The stepped surface of the second latch part is also a second inclined surface. The inclination angle of the first inclined surface is greater than that of the second inclined surface.

[0022] Optionally, the conductive terminal is provided with an elastic latch, the outer wall of the plug box is provided with a backstop hole, the plug box has a mounting through hole for installing the conductive terminal, the backstop hole is connected to the mounting through hole, and when the housing is inserted into the plug box, the elastic latch is engaged in the backstop hole.

[0023] The present invention has the following advantages:

[0024] 1. The AC / DC integrated charging socket of the present invention features a modular design for the low-voltage plug module, grounding terminal assembly, DC terminal assembly, and AC terminal assembly. Each module can be assembled independently and can be quickly assembled through standardized interfaces, thereby solving the problems of high cost, low efficiency, and large quality fluctuations of traditional charging sockets.

[0025] 2. The DC terminal assembly of the present invention is positioned by an axial positioning ring, thereby eliminating the need for an axial positioning structure on the DC terminal, making the structure of the DC terminal simpler, easier to manufacture, and saving raw materials, thus reducing production costs.

[0026] 3. The low-voltage plug-in module of the present invention has a dual locking mechanism, strong vibration resistance, ensuring the reliability of the charging socket, and has fewer parts, making assembly convenient and reducing production costs.

[0027] 4. The AC terminal assembly of the present invention is easy to install, and the DC terminal assembly has a high sealing possibility after installation. Moreover, the stainless steel housing reduces production costs while ensuring transmission performance. Attached Figure Description

[0028] Figure 1 Schematic diagram of AC / DC integrated charging socket

[0029] Figure 2 This is a schematic diagram of the DC terminal assembly installation.

[0030] Figure 3 This is a schematic diagram of the DC terminal assembly.

[0031] Figure 4 This is a schematic diagram of the axial positioning ring.

[0032] Figure 5 This is a schematic diagram of the structure of a semi-circular ring;

[0033] Figure 6 for Figure 2 Cross-sectional view at point A in the middle;

[0034] Figure 7 This is a schematic diagram of the grounding terminal assembly.

[0035] Figure 8 This is a schematic diagram of the installation of the grounding terminal assembly;

[0036] Figure 9 This is a schematic diagram of the elastic positioning ring.

[0037] Figure 10 This is a schematic diagram of the installation of the low-voltage plug-in module and the plug-in box;

[0038] Figure 11 This is a schematic diagram showing the installation of a low-voltage plug-in module inside a plug-in box.

[0039] Figure 12 This is a schematic diagram of the low-pressure casing.

[0040] Figure 13 for Figure 11 Schematic diagram of the cross section at point Q;

[0041] Figure 14 for Figure 11 Cross-sectional view at point P;

[0042] Figure 15 This is a schematic diagram of the installation of the AC terminal assembly;

[0043] Figure 16 This is a schematic diagram of the AC terminal assembly.

[0044] In the diagram, 1-panel, 2-DC housing, 3-DC tail cover, 4-DC terminal assembly, 5-grounding terminal assembly, 6-low voltage plug-in module, 7-AC housing, 8-AC tail cover, 9-AC PCB board, 10-AC signal terminal, 11-DC signal terminal, 101-DC terminal, 102-axial positioning ring, 103-DC sealing ring, 104-elastic positioning ring, 105-spring, 106-positioning notch, 107-DC cavity, 111-semi-circular ring, 112-lock, 113-positioning hole, 114-lock hole, 115-positioning post, 116-boob, 117 - Anti-rotation notch, 201- Grounding terminal, 202- Elastic positioning ring, 203- Locking cover, 204- Grounding sealing ring, 205- DC PCB board, 210- Ring ring, 211- Soldering pin, 212- Elastic compression spring, 213- Protrusion, 214- Grounding through hole, 21- Wedge-shaped surface, 22- Protruding ridge, 23- Inner spring, 31- Low-voltage housing, 32- Waterproof plug, 33- Seal, 34- Conductive terminal, 37- Elastic latch, 38- Connector box, 301- First latch, 302- Second latch, 303- Anti-reverse hole, 305- Second mounting platform, 306- First mounting platform 40-AC terminal assembly, 401-Stainless steel housing, 402-Anti-reverse spring tooth, 403-Limiting claw, 404-Riveting hole, 405-Glue-coating process notch, 406-Glue-coating sealing ring, 407-Core wire connection section, 408-Core wire, 409-Clamping tooth, 410-Fixing head, 411-Rubber waterproof plug, 412-AC terminal, 413-AC cavity. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] like Figure 1As shown, an AC / DC integrated charging socket includes a panel 1, a DC housing 2, a DC tail cover 3, an AC housing, and an AC tail cover 8. The DC housing 2 is fastened to the panel 1, and the DC tail cover 3 is fastened to the DC housing 2. In this embodiment, the panel 1 has a cavity at its tail end that matches the DC housing 2, and a fastening hole is provided on the housing at the tail end of the panel 1. An elastic buckle is provided on the outer side wall of the front end of the DC housing 2. During installation, the panel 1 is fixed, and then the DC housing 2 is inserted into the panel 1. The elastic buckle undergoes elastic deformation. When the elastic buckle is located at the fastening hole, it fastens at the fastening hole, thereby achieving the fastening of the panel 1 and the DC housing 2. When disassembly is required, Then, external force can be used to disengage the elastic buckle from the buckle hole, and the DC housing 2 can be removed from the panel 1. In this embodiment, the buckling structure between the DC tail cover 3 and the DC housing 2 is the same as the buckling structure between the panel 1 and the DC housing 2. A buckle hole is provided on the tail side wall of the DC housing 2, and an elastic buckle is provided on the front side wall of the DC tail cover 3. Similarly, the AC housing 7 is buckled to the panel 1. The AC housing 7 is located on one side of the DC housing 2. The AC tail cover 83 is buckled to the AC housing. The AC tail cover 8 and the AC housing are also buckled by an elastic buckle and a buckle hole. The AC housing and the AC tail cover 8 are also buckled by an elastic buckle and a buckle hole.

[0052] In this embodiment, an AC PCB board 9 is mounted on the rear end face of the AC housing 7. The AC housing 7 is also provided with several signal terminal holes, and AC signal terminals 10 are installed in the signal terminal holes. The AC signal terminals 10 are plugged into the corresponding contacts on the AC PCB board 9. In this embodiment, the AC signal terminals 10 belong to the existing terminal structure, and the installation of the AC signal terminals 10 and the AC housing 7 is also the prior art. Therefore, the specific installation method of the AC signal terminals 10 and the AC housing 7 will not be described in detail.

[0053] In this embodiment, as Figure 15 As shown, the AC housing 7 also has an AC cavity 413, and an AC terminal assembly 40 is installed inside the AC cavity 413. Specifically, as shown... Figure 16As shown, the AC terminal assembly 40 includes an AC terminal 412. The head of the AC terminal 412 is provided with a connector, and a spring is installed inside the connector. The connector is fitted inside a stainless steel housing 401, and the relative position of the connector and the stainless steel housing 401 is fixed. In this embodiment, the head of the stainless steel housing 401 is provided with a backward-bent limiting claw 403, and the head of the AC terminal 412 is engaged within the limiting claw 403. Furthermore, the head of the stainless steel housing 401 is provided with a backward-bent limiting claw 403, and the head of the AC terminal 412 is engaged within the limiting claw 403. The limiting claws 403 are evenly distributed on the same circumference. The tail end is provided with a riveting hole 404, and the AC terminal 412 is provided with a riveting tooth riveting into the riveting hole 404, so that the stainless steel housing 401 and the AC terminal 412 are securely installed. In this embodiment, the outer side wall of the stainless steel housing 401 is provided with an outwardly extending anti-reverse spring tooth 402. The anti-reverse spring tooth 402 extends backward, and the inner side wall of the AC cavity is provided with an anti-reverse groove. The rear end face of the anti-reverse spring tooth 402 on the AC terminal assembly 40 abuts against the rear end face of the anti-reverse groove, and the front end face of the stainless steel housing 401 abuts against the stepped surface in the front end cavity of the AC cavity, thereby realizing the secure installation of the AC terminal assembly 40 and the AC housing 7.

[0054] In this embodiment, as Figure 16 As shown, a rubber-coated sealing ring 406 is also installed in the middle of the AC terminal 412. In order to facilitate the injection molding of the rubber-coated sealing ring 406, the plug end of the AC terminal 412 is a cylindrical structure. Rubber-coated process notches 405 are provided on both the front and rear sides of the rubber-coated sealing ring 406. An injection molding module is installed in the rubber-coated process notch 405, thereby forming a sealed cavity in the area of ​​the rubber-coated sealing ring 406 on the AC terminal 412. Injection molding material is injected into the sealing material. After cooling, the rubber-coated sealing ring 406 is formed in the middle of the AC terminal 412.

[0055] In this embodiment, a core wire 408 needs to be connected to the AC terminal 412, and the core wire 408 needs to be sealed with a rubber waterproof plug 411. With traditional waterproof plugs 32, after installation, the waterproof plug 32 is not axially fixed, making it prone to axial movement and thus causing waterproofing failure. In this embodiment, as... Figure 16As shown, the tail of the AC terminal 412 is also provided with a core wire 408 connecting section 407, on which the core wire 408 is installed. A rubber waterproof plug 411 is fitted onto the core wire 408, and a fixing head 410 is provided at the head of the rubber waterproof plug 411. A clamping tooth 409 is provided at the tail of the core wire 408 connecting section 407, which clamps the fixing head 410. Furthermore, the core wire 408 connecting section 407 and the core wire 408 are fixed by crimping, and the clamping tooth 409 and the fixing head 410 are also fixed by crimping. When the AC terminal 412 is manufactured, it is first formed by punching and rounding. At this time, the core wire 408 connecting section 407 is a U-shaped structure, and the clamping tooth 409 is on the U-shaped arm. Then, the core wire 408 is placed on the core wire 408 connecting section 407. Through crimping, the core wire 408 connecting section 407 and the core wire 408 are installed. After the clamping tooth 409 is crimped, the clamping tooth 409 clamps the fixing head 410 tightly. In order to avoid interference of the clamping tooth 409, the clamping teeth 409 on both sides of the U-shaped arm are staggered.

[0056] In this embodiment, as Figure 2 As shown, a DC cavity 107 is provided on the DC housing 2, and a DC terminal assembly 4 is installed inside the DC cavity 107. The axial positioning ring 102 of the DC terminal assembly 4 abuts against the DC housing 2 and the DC tail cover 3. In this embodiment, as... Figure 3 As shown, the DC terminal assembly 4 includes a DC terminal 101. A through spring 105 is installed in the inner cavity of the front end of the DC terminal 101. The DC terminal 101 has a first annular groove, a second annular groove, and a third annular groove formed sequentially from front to back. An elastic positioning ring 104 is installed in the first annular groove, a DC sealing ring 103 is installed in the second annular groove, and an axial positioning ring 102 is installed in the third annular groove. Further, as... Figure 2 and Figure 6As shown, the inner wall of the DC cavity 107 is also provided with protruding ribs 22 distributed on the same circumference. The rear sidewall of the protruding ribs 22 is a wedge-shaped surface 21. During installation, the elastic positioning ring 104 and the DC sealing ring 103 are fitted onto the DC terminal 101. Then, the DC terminal 101 is inserted from the tail of the DC cavity 107 forward. After the elastic positioning ring 104 contacts the wedge-shaped surface 21, it is squeezed by the wedge-shaped surface 21 as the DC terminal 101 is inserted. Preferably, the elastic positioning ring 104 is a C-shaped ring. After the elastic positioning ring 104 contracts, when it passes the protrusion 22, it resets under its elastic restoring force. At this time, the operator can determine whether the elastic positioning ring 104 has passed the protrusion 22 by the sound emitted when it contacts the inner wall of the DC cavity 107. Once the operator determines that the elastic positioning ring 104 has passed the protrusion 22, they will no longer push the DC terminal 101 forward. Then, the axial positioning ring 102 is installed in the third annular groove. In this embodiment, as shown... Figure 4 and Figure 5 As shown, the axial positioning ring 102 includes two semicircular rings 111. The inner diameter of the semicircular rings 111 matches the diameter of the third annular groove. A latch 112 is provided on one snap-fit ​​end face of the semicircular rings 111, and a locking hole 114 is provided on the other snap-fit ​​end face of the semicircular rings 111. After the two semicircular rings 111 are snapped together, the latch 112 is locked into the corresponding locking hole 114. Furthermore, a positioning post 115 is provided on one snap-fit ​​end face of the semicircular rings 111, and a positioning hole 113 is provided on the other snap-fit ​​end face of the semicircular rings 111. The positioning post 115 is inserted into the corresponding positioning hole 113. When the elastic positioning ring 104 is installed, the presence of the protrusion 22 prevents the DC terminal 101 from exiting the DC cavity 107. When installing the axial positioning ring 102, the two semicircular rings 111 are aligned with the third annular groove, and then the two semicircular rings 111 are secured by the latch 112 and the locking hole 114. 4. After locking, the axial positioning ring 102 is stuck outside the DC cavity 107. At this time, the axial positioning ring 102 enables the DC terminal 101 to have a stop function. Furthermore, the DC terminal 101 located at the third annular groove is also provided with a positioning notch 106. A boss 116 is provided on the front end face of the semi-circular ring 111. The boss 116 is located inside the positioning notch 106. Through the cooperation between the boss 116 and the positioning notch 106, the installation position of the semi-circular ring 111 is relatively fixed. Furthermore, an anti-rotation notch 117 is also provided on the semi-circular ring 111. An anti-rotation block is provided in the front end cavity of the DC tail cover 3 and is stuck in the anti-rotation notch 117. When the DC tail cover 3 and the DC housing 2 are installed, the cooperation between the anti-rotation block and the anti-rotation notch 117 prevents the axial positioning ring 102 from rotating circumferentially, thereby preventing the DC terminal 101 from rotating circumferentially.

[0057] In this embodiment, as Figure 2 As shown, the DC tail cover 3 has a through hole for easy passage of terminal cables. The front end of the through hole is provided with several inwardly contracting inner spring pieces 23, and the several inner spring pieces 23 are distributed on the same circumference. The inner spring pieces 23 abut against the rear end face of the axial positioning ring 102. When the DC tail cover 3 is installed, the inner spring pieces 23 abut against the rear end face of the axial positioning ring 102, further preventing the DC terminal 101 from axially retracting.

[0058] In this embodiment, a DC PCB board 205 is also installed on the rear end face of the DC housing 2. The DC housing 2 is also provided with several mounting through holes, and DC signal terminals 11 are installed in the mounting through holes. The DC signal terminals 11 are inserted into the corresponding contact heads on the DC PCB board 205. In this embodiment, metal spring teeth are provided on the DC signal terminals 11, and a mounting platform is provided in the mounting through holes of the DC housing 2. The locking of the metal spring teeth and the mounting platform can achieve a stable installation of the DC signal terminals 11 and the DC housing 2. The DC PCB board 205 has contact heads. When installing the DC PCB board 205, the corresponding contact head is inserted into the corresponding DC signal terminal 11. The DC PCB board 205 and the DC housing 2 can be detachably connected by screws.

[0059] In this embodiment, as Figure 1 As shown, the DC tail cover 3 and the AC tail cover 8 are also provided with a connector box 38, on which a low-voltage connector module 6 is installed. The low-voltage connector module 6 on the DC tail cover 3 is connected to the DC PCB board 205, and the low-voltage connector module 6 on the AC tail cover 8 is connected to the AC PCB board. The low-voltage connector module 6 passes through the DC tail cover 3 and is connected to the corresponding socket on the DC PCB board 205. In this embodiment, as shown... Figure 10 and Figure 11 As shown, the low-voltage plug-in module 6 includes conductive terminals 34 and a low-voltage housing 31. The conductive terminals 34 are sealed and installed inside the low-voltage housing 31. In this embodiment, the conductive terminals 34 are provided with elastic latches 37, and a plug-in box 38 is provided on the DC tail cover 3. Figure 13 As shown, a retaining hole 303 is provided on the outer side wall of the plug box 38. The plug box 38 has a mounting hole for installing the conductive terminal 34. The retaining hole 303 communicates with the mounting hole. When the low-voltage housing 31 is inserted into the plug box 38, the elastic latch 37 is engaged in the retaining hole 303. During installation, the elastic latch 37 faces the side wall where the retaining hole 303 is located, and then the conductive terminal 34 is inserted from the mounting hole. When the elastic latch 37 moves to the position of the retaining hole 303, the conductive terminal 34 is rotated, so that the elastic latch 37 springs into the retaining hole 303. At this time, the elastic latch 37 is engaged in the retaining hole 303, thereby preventing the conductive terminal 34 from being dislodged from the low-voltage housing 31 without external force.

[0060] In this embodiment, as Figure 13 and Figure 14 As shown, the inner cavity of the connector box 38 is provided with a second mounting platform 305, and the outer wall of the connector box 38 is provided with a first mounting platform 306. The low-pressure housing 31 has a first step and a second step, with the first step located above the second step. A first latch 301 extending toward the connector box 38 is provided on the first step, and a second latch 302 extending toward the connector box 38 is provided on the second step. When the low-pressure housing 31 is inserted into the connector box 38, the first latch 301 engages with the first mounting platform. On 306, the second latch 302 is fastened to the second mounting plate 305. In use, the cooperation between the first mounting plate and the first latch 301 forms a first locking mechanism, which can prevent the low-pressure housing 31 from moving backward. The cooperation between the second mounting plate and the second latch 302 forms a second locking mechanism, which can also prevent the low-pressure housing 31 from moving backward. That is to say, when the first locking mechanism fails, the second locking mechanism can still prevent the low-pressure housing 31 from moving backward, thereby ensuring the reliability of the installation of the low-pressure housing 31 and the plug box 38.

[0061] In this embodiment, a notch is provided on the outer side wall of the plug box 38, and the top of the notch forms a first mounting platform 306. Therefore, no protrusion is required on the plug box 38, which makes the space dedicated to the plug box 38 smaller.

[0062] In this embodiment, as Figure 12 As shown, the first latch 301 includes a first spring arm and a first latch part. The first latch part is located inside the first spring arm. During installation, the first latch part interferes with the outer wall of the plug box 38, which causes the first spring arm to undergo elastic deformation. When the first latch part enters the notch position, the first latch part springs into the notch under the action of elastic restoring force, which causes the first latch part to be fastened on the first hanging platform 306.

[0063] In this embodiment, as Figure 12 As shown, the second latch 302 includes a second spring arm and a second latching part. The second latching part is located on the outside of the second spring arm. Further, the outer wall of the second spring arm is an inclined wall, the top surface of the second mounting platform 305 is a wedge-shaped top surface, the step surface of the second mounting platform 305 is a first inclined surface, and the step surface of the second latching part is also a second inclined surface. The inclination angle of the first inclined surface is greater than that of the second inclined surface. During installation, after the low-pressure housing 31 is inserted into the plug box 38, when the second latching part interferes with the first inclined surface, the second spring arm deforms inward. When the second latching part passes over the second mounting platform 305, the second latching part is fastened to the second mounting platform 305 under the action of elastic restoring force. Since the inclination angle of the first inclined surface is greater than that of the second inclined surface, the contact area between the second latching part and the second mounting platform 305 is small, which makes it easier for the operator to unlock the second latching part from the second mounting platform 305.

[0064] In this embodiment, as Figure 12 As shown, the first latch is located inside the first spring arm, and the second latch is located outside the second spring arm. Therefore, when the first locking mechanism and the second locking mechanism are unlocked, the directions of the external forces they receive are opposite. As a result, the charging socket has strong shock resistance during use, ensuring the reliability of the charging socket.

[0065] In this embodiment, as Figure 10 As shown, a seal 33 is fitted on the low-pressure housing 31 and is pressed into the cavity of the plug box 38. A waterproof plug 32 is fitted on the conductive terminal 34 and is pressed into the corresponding mounting hole. The waterproof performance of the charging socket is ensured by the seal 33 and the waterproof plug 32.

[0066] In this embodiment, as Figure 1 As shown, the AC / DC integrated charging socket also includes a grounding terminal assembly 5. The grounding terminal 201 of the grounding terminal assembly 5 is installed inside the DC housing 2. Furthermore, a grounding through hole 214 is also provided on the DC housing 2, and the grounding terminal assembly 5 is installed inside the grounding through hole 214. In this embodiment, as shown... Figure 7 and Figure 8 As shown, the grounding terminal assembly 5 includes a grounding terminal 201 and an elastic positioning ring 202, as... Figure 9As shown, the elastic positioning ring 202 includes an annular ring 210, on which multiple elastic compression springs 212 are evenly distributed on the same circumference. The elastic compression springs 212 contract inward, and the spring portion of the elastic compression spring 212 abuts against the outer circumference of the grounding terminal 201. In this embodiment, the elastic positioning ring 202 has a rectangular structure, and elastic compression springs 212 are provided on each of the four side walls of the elastic positioning ring 202. Furthermore, multiple protrusions 213 are provided on each of the four side walls of the elastic positioning ring 202, thereby increasing the elastic positioning ring 202's strength. 2. For structural strength, a welding pin 211 is provided on the rear end face of the elastic compression spring 212. A welding hole is provided on the DC PCB board 205, and the welding pin 211 is welded into the welding hole. A through hole for the grounding terminal 201 is provided on the DC PCB board 205, and the elastic compression spring 212 of the grounding terminal assembly 5 is fixedly connected to the DC PCB board 205. A grounding sealing ring 204 is also installed on the grounding terminal 201. The grounding sealing ring 204 is located in front of the elastic compression spring 212 and is pressed into the grounding through hole 214. During installation, the elastic compression spring is first soldered onto the PCB. After the DC PCB board 205 and the DC housing 2 are installed, the grounding terminal 201 is inserted through the elastic compression spring. The spring portion of the elastic compression spring 212 undergoes elastic deformation. A protruding ring is provided on the grounding terminal 201, and the diameter of the protruding ring is larger than the diameter of the grounding through hole 214. When the protruding ring moves to the grounding through hole 214, the grounding terminal 201 cannot move forward axially and thus stops. In this embodiment, the rear end of the grounding terminal 201 is fitted into the locking cover 203, and the locking cover 203 is fastened to the DC tail cover 3. Furthermore, a snap hole is provided on the DC tail cover 3, and an elastic snap is provided on the lock cover 203. The lock cover 203 and the DC tail cover 3 are installed by snapping the elastic snap with the snap hole. After the lock cover 203 and the DC tail cover 3 are installed, the front end face of the lock cover 203 abuts against the rear end face of the convex ring, thereby preventing the grounding terminal 201 from retracting and ensuring the axial position of the grounding terminal 201 is fixed. In this embodiment, a grounding cable is connected to the tail of the grounding terminal 201, and a rubber sealing ring for sealing the grounding cable is provided in the inner cavity of the lock cover 203.

[0067] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An AC / DC integrated charging socket, comprising a panel, a DC housing, a DC tail cover, an AC housing, and an AC tail cover, wherein the DC housing is fastened to the panel, the DC tail cover is fastened to the DC housing, a DC PCB board is mounted on the rear end face of the DC housing, and the DC housing has a plurality of mounting through holes, wherein AC / DC signal terminals are installed in the mounting through holes and are inserted into corresponding contacts on the DC PCB board, the AC housing is fastened to the panel, the AC housing is located on one side of the DC housing, the AC tail cover is fastened to the AC housing, an AC PCB board is mounted on the rear end face of the AC housing, and the AC housing has a plurality of signal terminal holes, wherein AC signal terminals are installed in the signal terminal holes and are inserted into corresponding contacts on the AC PCB board, characterized in that: The DC housing has a DC cavity, and a DC terminal assembly is installed in the DC cavity. The axial positioning ring of the DC terminal assembly abuts between the DC housing and the DC tail cover. The DC terminal assembly includes a DC terminal, a through spring is installed in the inner cavity of the front end of the DC terminal, and a first annular groove, a second annular groove and a third annular groove are opened on the DC terminal from front to back. An elastic positioning ring is installed in the first annular groove, a DC sealing ring is installed in the second annular groove, and an axial positioning ring is installed in the third annular groove. The DC housing has a grounding through hole, and a grounding terminal assembly is installed in the grounding through hole. The grounding terminal assembly includes a grounding terminal and an elastic positioning ring. The elastic positioning ring includes an annular ring, and multiple elastic compression springs are evenly distributed on the same circumference on the annular ring. The elastic compression springs contract inward, and the spring portion of the elastic compression spring abuts against the outer circumference of the grounding terminal. The DC PCB board has a through hole through which the grounding terminal passes, and the elastic compression spring is fixedly connected to the DC PCB board. The AC housing also has an AC cavity, and an AC terminal assembly is installed in the AC cavity. The AC terminal assembly includes an AC terminal, and the head of the AC terminal is provided with a connector. The connector is fitted inside the stainless steel housing, and the relative position of the connector and the stainless steel housing is fixed. The outer wall of the stainless steel housing is provided with outwardly extending anti-reverse teeth. The anti-reverse teeth extend backward. The middle of the AC terminal is also provided with a rubber sealing ring. The tail of the AC terminal is also provided with a core wire connecting section. A core wire is installed on the core wire connecting section. A rubber waterproof plug is fitted on the core wire. The head of the rubber waterproof plug is provided with a fixing head. The tail of the core wire connecting section is provided with a clamping tooth. The clamping tooth clamps the fixing head. The inner wall of the AC cavity is provided with an anti-reverse groove. The rear end face of the anti-reverse teeth on the AC terminal assembly abuts against the rear end face of the anti-reverse groove, and the front end face of the stainless steel housing abuts against the stepped surface in the front cavity of the AC cavity. Both the DC tail cover and the AC tail cover are equipped with plug-in boxes, and low-voltage plug-in modules are installed on the plug-in boxes. The low-voltage plug-in modules on the DC tail cover are plugged into the DC PCB board, and the low-voltage plug-in modules on the AC tail cover are plugged into the AC PCB board.

2. The AC / DC integrated charging socket according to claim 1, characterized in that: The axial positioning ring includes two semicircular rings. The inner diameter of the semicircular rings matches the diameter of the third annular groove. A latch is provided on one end face of the semicircular ring, and a locking hole is provided on the other end face of the semicircular ring. After the two semicircular rings are latched together, the latch is locked in the corresponding locking hole.

3. The AC / DC integrated charging socket according to claim 2, characterized in that: A positioning post is provided on one snap-fit ​​end face of the semicircular ring, and a positioning hole is provided on the other snap-fit ​​end face of the semicircular ring. The positioning post is inserted into the corresponding positioning hole. The DC terminal located at the third annular groove is also provided with a positioning notch. A boss is provided on the front end face of the semicircular ring, and the boss is located in the positioning notch.

4. The AC / DC integrated charging socket according to claim 3, characterized in that: The DC tail cover has a through hole to facilitate the passage of terminal cables. The front end of the through hole is provided with several inwardly contracting inner spring pieces, which are distributed on the same circumference. The inner spring pieces abut against the rear end face of the axial positioning ring.

5. The AC / DC integrated charging socket according to claim 4, characterized in that: The inner wall of the DC cavity is also provided with protruding ridges distributed on the same circumference, and the rear sidewall of the protruding ridges is a wedge-shaped surface.

6. The AC / DC integrated charging socket according to any one of claims 1-5, characterized in that: The elastic positioning ring has a rectangular structure. Each of the four side walls of the elastic positioning ring is provided with an elastic compression spring. Each of the four side walls of the elastic positioning ring is provided with a plurality of protrusions. A welding pin is provided on the rear end face of the elastic compression spring. A welding hole is provided on the DC PCB board, and the welding pin is welded into the welding hole.

7. The AC / DC integrated charging socket according to any one of claims 1-5, characterized in that: The stainless steel housing has a backward-bending limiting claw at its head, and the head of the AC terminal is locked in the limiting claw. The stainless steel housing has a riveting hole at its tail, and the AC terminal has a riveting tooth that is riveted into the riveting hole.

8. The AC / DC integrated charging socket according to any one of claims 1-5, characterized in that: The low-voltage plug-in module includes conductive terminals and a low-voltage housing. The conductive terminals are sealed and installed inside the low-voltage housing. The inner cavity of the plug-in box is provided with a second mounting platform, and the outer wall of the plug-in box is provided with a first mounting platform. The low-voltage housing has a first step and a second step, with the first step located above the second step. The first step is provided with a first latch extending toward the plug-in box, and the second step is provided with a second latch extending toward the plug-in box. When the low-voltage housing is inserted into the plug-in box, the first latch engages with the first mounting platform, and the second latch engages with the second mounting platform.

9. The AC / DC integrated charging socket of claim 8, wherein: A notch is provided on the outer side wall of the plug box, and the top of the notch forms the first hanging platform. The first latch includes a first spring arm and a first latch part. The first latch part is located inside the first spring arm. The second latch includes a second spring arm and a second latch part. The second latch part is located outside the second spring arm. The outer side wall of the second spring arm is an inclined wall. The top surface of the second hanging platform is a wedge-shaped surface. The stepped surface of the second hanging platform is a first inclined surface. The stepped surface of the second latch part is also a second inclined surface. The inclination angle of the first inclined surface is greater than the inclination angle of the second inclined surface.

10. The AC / DC integrated charging socket of claim 9, wherein: The conductive terminal is provided with an elastic latch, the outer wall of the plug box is provided with a backstop hole, the plug box is provided with a mounting through hole for installing the conductive terminal, the backstop hole communicates with the mounting through hole, and when the housing is inserted into the plug box, the elastic latch is fastened in the backstop hole.

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