On-vehicle charger

Abstract

The application provides a vehicle-mounted charger, and relates to the field of charging devices.The vehicle-mounted charger comprises a mainboard, a shell, a cover plate and a suction accessory; the shell is provided with a first cavity with an opening at the top, and the bottom wall of the first cavity is provided with a positioning column; the mainboard is provided with a positioning hole, the mainboard is installed in the first cavity, and the positioning column is inserted into the positioning hole; the cover plate is provided with a connecting column, and the suction accessory is installed on the connecting column; one side of the cover plate provided with the connecting column is covered on the opening end of the shell and connected with the shell, and the suction accessory is connected with the mainboard in a suction mode.The vehicle-mounted charger provided by the application solves the technical problems of low assembly efficiency caused by the connection of the mainboard of the charger with the screw column of the shell by means of screws and complex production process of the shell in the prior art.

Description

Technical Field

[0001] This application relates to the field of charging devices, and more specifically, to an on-board charger. Background Technology

[0002] On-board chargers are mainly used to convert AC to DC output and are fixedly installed on electric vehicles.

[0003] In existing on-board chargers, the mainboard is installed inside the housing and connected to the internal screw posts using screws. To ensure even stress distribution during fastening, multiple screw holes are typically evenly distributed on the mainboard, and the housing interior needs to have an equal number of screw posts. Firstly, using screws for fastening can lead to abnormalities such as stripped screws during tightening, affecting installation and disassembly. Furthermore, screws can easily fall into the housing during assembly, hindering the assembly process. Secondly, since screws need to mate with screw posts, multiple screw posts are required inside the housing, and each screw post needs to be machined with threaded holes and internal threads, complicating the housing manufacturing process. Finally, during disassembly, thermally conductive adhesive can easily overflow into the threaded holes of the screw posts, affecting screw tightening and assembly progress. Utility Model Content

[0004] The purpose of this application is to provide an on-board charger to alleviate the technical problems of low assembly efficiency and complex housing manufacturing processes caused by the connection between the mainboard of the charger and the screw post of the housing using screws in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: The vehicle charger provided by this utility model includes a main board, a housing, a cover plate, and an adsorption component; The housing has a first cavity with an opening at the top, and the bottom wall of the first cavity has a positioning post; the main board has a positioning hole, the main board is installed in the first cavity, and the positioning post is inserted into the positioning hole; The cover plate is provided with a connecting post, and the adsorption element is installed on the connecting post; The cover plate, with the connecting post on one side, covers the opening of the housing and is connected to the housing. The adsorption component is adsorbed and connected to the main board.

[0006] Furthermore, the adsorption element is configured as a silicone suction cup.

[0007] Furthermore, the adsorption element is interference-fitted or bonded to the connecting column.

[0008] Furthermore, the connecting column and the cover plate are integrally formed.

[0009] Furthermore, multiple connecting posts are provided, spaced apart, and each connecting post is equipped with the adsorption element.

[0010] Furthermore, the cover plate is provided with a positioning core, which is spaced apart from the connecting post; The positioning core is inserted into the top of the positioning post.

[0011] Furthermore, the cover plate has a second cavity with an opening at the bottom, and the connecting post is provided on the top wall of the second cavity; The outer wall of the opening end of the cover plate is provided with an outwardly extending connecting protrusion, which is connected to the top wall of the housing.

[0012] Furthermore, the connecting protrusion is bonded to the top wall of the housing; And / or, the cover plate is connected to the top wall of the housing by fasteners.

[0013] Furthermore, the horizontal cross-sectional dimension of the positioning post gradually increases from the end closest to the bottom wall of the first cavity to the end furthest from the bottom wall of the first cavity.

[0014] Furthermore, the first cavity of the housing is square, and two positioning posts are provided, with the two positioning posts located at two opposite corners of the first cavity; The positioning hole is provided in two parts, and the two positioning holes are inserted into the two positioning posts in a one-to-one correspondence.

[0015] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows: The vehicle charger provided by this utility model includes a main board, a housing, a cover plate, and an adsorption component; the housing has a first cavity with an opening at the top, and the bottom wall of the first cavity has a positioning post; the main board has a positioning hole, the main board is installed in the first cavity, and the positioning post is inserted into the positioning hole; the cover plate has a connecting post, and the adsorption component is installed on the connecting post; the side of the cover plate with the connecting post covers the opening end of the housing and is connected to the housing, and the adsorption component is adsorbed and connected to the main board.

[0016] The first cavity of the housing is used to install the motherboard. The top opening of the first cavity facilitates the placement of the motherboard inside the first cavity. The bottom wall of the first cavity is provided with positioning posts, and the motherboard is provided with positioning holes. The positioning posts are inserted into the positioning holes to locate the installation position of the motherboard and to achieve initial fastening of the motherboard. The cover plate is placed on the opening end of the housing and connected to the housing to achieve sealing of the first cavity. The connecting post of the cover plate is equipped with an adsorption component. When the cover plate is placed on the housing, the adsorption component is adsorbed and connected to the motherboard to achieve fastening of the motherboard.

[0017] The motherboard's positioning holes accommodate positioning posts, initially limiting its horizontal movement. The suction unit connects to the motherboard and is fixed to a cover plate, which in turn is fixed to the housing, further limiting the motherboard's horizontal movement. In other words, the positioning posts and suction unit secure the motherboard horizontally. The positioning posts, inserted into the motherboard's positioning holes, support the motherboard upwards, limiting its downward vertical movement. The suction unit, located above the motherboard, presses down on it, limiting its upward vertical movement. Thus, the upward support of the positioning posts and the downward pressure of the suction unit secure the motherboard vertically.

[0018] The motherboard in this on-board charger is secured using positioning posts and suction devices connected to the cover plate, avoiding the use of screws to secure the motherboard. This avoids problems such as low assembly efficiency, large housing weight, and complex manufacturing processes. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the internal structure of the on-board charger provided in an embodiment of this application; Figure 2 This is an exploded view of the on-board charger provided in an embodiment of this application.

[0021] icon: 100 - Mainboard; 110 - Positioning hole; 200 - Housing; 210 - First cavity; 220 - Positioning post; 300 - Cover plate; 310 - Connecting post; 320 - Positioning core; 330 - Second cavity; 340 - Connecting protrusion; 400 - Adsorption element. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] In the description of this application, it should be noted that the terms "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 is in use. They are used only for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 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 application based on the specific circumstances.

[0025] The existing OBC (On-board charger) typically uses screws to secure the PCB (Printed Circuit Board). To ensure even stress distribution during screw fastening, multiple screw holes are usually evenly distributed on the PCB. This necessitates the pre-setting of multiple screw posts during die-casting housing design, significantly limiting the design flexibility for reducing die-casting material. Furthermore, it requires additional machining processes for threaded holes and internal threads. During the fastening process, issues such as stripped screws can occur, affecting installation and disassembly. Moreover, screws falling into the OBC cavity during assembly can severely impact the assembly progress.

[0026] In view of this, see Figure 1 and Figure 2 The vehicle charger provided in this embodiment includes a main board 100, a housing 200, a cover plate 300, and an adsorption component 400. The housing 200 has a first cavity 210 with an opening at the top, and a positioning post 220 is provided on the bottom wall of the first cavity 210. The main board 100 has a positioning hole 110, and the main board 100 is installed in the first cavity 210, with the positioning post 220 inserted into the positioning hole 110. The cover plate 300 has a connecting post 310, and the adsorption component 400 is installed on the connecting post 310. The side of the cover plate 300 with the connecting post 310 covers the opening end of the housing 200 and is connected to the housing 200. The adsorption component 400 is adsorbed and connected to the main board 100.

[0027] Specifically, the top of the housing 200 is recessed downwards to form a first cavity 210 with an opening at the top; the housing 200 is formed by die casting. The main board 100 is configured as a PCB board, which houses the electronic components required for the on-board charger. A cover plate 300 is placed over the opening end of the housing 200 to seal the first cavity 210. A connecting post 310 is used to install the adsorption component 400. It is worth noting that conventional die-cast housings also have posts for positioning, and the top of the die-cast housing also needs to be covered. Therefore, in this embodiment, the positioning posts 220 and the cover plate 300 of the housing 200 do not increase the weight of the on-board charger or the processing steps. On the contrary, by reducing the number of screw posts in the die-cast housing, the weight of the on-board charger is reduced, and the machining steps for the screw posts are reduced. In this text, the vertical direction refers to the height direction of the housing 200 when the bottom of the housing 200 is placed on a horizontal plane; the horizontal direction refers to the direction parallel to the horizontal plane when the bottom of the housing 200 is placed on a horizontal plane.

[0028] The first cavity 210 of the housing 200 is used to install the motherboard 100. The top opening of the first cavity 210 facilitates the placement of the motherboard 100 inside the first cavity 210. The bottom wall of the first cavity 210 is provided with a positioning post 220, and the motherboard 100 is provided with a positioning hole 110. The positioning post 220 is inserted into the positioning hole 110 to locate the installation position of the motherboard 100 and to achieve initial fastening of the motherboard 100. The cover plate 300 is placed on the open end of the housing 200 and connected to the housing 200 to seal the first cavity 210. The connecting post 310 of the cover plate 300 is equipped with an adsorption member 400. When the cover plate 300 is placed on the housing 200, the adsorption member 400 is adsorbed and connected to the motherboard 100 to achieve fastening of the motherboard 100.

[0029] The positioning hole 110 of the motherboard 100 is fitted with a positioning post 220, which initially limits the horizontal movement of the motherboard 100. The suction member 400 is suction-connected to the motherboard 100 and is fixed to the cover plate 300, which is fixed to the housing 200, further limiting the horizontal movement of the motherboard 100. In other words, the positioning post 220 and the suction member 400 secure the motherboard 100 horizontally. The positioning post 220 is inserted into the positioning hole 110 of the motherboard 100, supporting the motherboard 100 upwards and limiting its downward movement vertically. The suction member 400 is located above the motherboard 100 and presses down on it, limiting its upward movement vertically. In other words, the upward support of the positioning post 220 and the downward pressure of the suction member 400 secure the motherboard 100 vertically.

[0030] The motherboard 100 in the on-board charger is secured by positioning posts 220 and suction components 400 connected to the cover plate 300, avoiding the use of screws to secure the motherboard 100, thus avoiding problems such as low assembly efficiency, large weight of the housing 200, and complex manufacturing process.

[0031] The structure and shape of the on-board charger are described in detail below: In the optional embodiment of this utility model, the adsorption element 400 is set as a silicone suction cup.

[0032] Specifically, silicone suction cups can be made of elastic plastic materials.

[0033] The silicone suction cup utilizes the elastic properties of its material to make the motherboard 100 connected to the housing 200 have strong vibration resistance.

[0034] In the optional embodiment of this utility model, the adsorption element 400 and the connecting column 310 are interference-fitted or bonded.

[0035] Specifically, the adsorption component 400 is configured as a silicone suction cup, with one end serving as the connecting end and the other as the adsorption end. The inner diameter of the connecting end is smaller than that of the adsorption end. The connecting end is fitted onto the end of the connecting post 310. The connecting post 310 is directly inserted into the connecting end of the silicone suction cup, using the friction between them for fixation, achieving an interference fit. Alternatively, the connecting post 310 is inserted into the connecting end of the silicone suction cup, and glue is filled between them for adhesive bonding. Of course, other connection methods, such as snap-fitting between the adsorption component 400 and the connecting post 310, should also be within the protection scope of this utility model embodiment.

[0036] In the optional embodiment of this utility model, the connecting column 310 and the cover plate 300 are integrally formed.

[0037] Specifically, a cover plate 300 with connecting post 310 is formed by using a mold.

[0038] The connecting post 310 and the cover plate 300 are integrally formed, which improves the connection strength, positional accuracy, and perpendicularity between the surfaces of the connecting post 310 and the cover plate 300.

[0039] In the optional solution provided by this utility model embodiment, multiple connecting posts 310 are provided, the multiple connecting posts 310 are spaced apart, and each connecting post 310 is equipped with an adsorption component 400.

[0040] Specifically, in this embodiment, the cover plate 300 is square, and multiple connecting posts 310 are spaced apart along the length and width directions of the cover plate 300, and the lengths of the multiple connecting posts 310 are the same. Furthermore, in order to ensure the uniformity of stress on the motherboard 100, the multiple connecting posts 310 are evenly distributed on the cover plate 300, and the positions of the connecting posts 310 need to avoid electronic components on the motherboard 100.

[0041] Multiple connecting posts 310 are equipped with suction components 400, which improves the fastening effect on the mainboard 100.

[0042] In the optional solution provided by this utility model embodiment, the cover plate 300 is provided with a positioning core 320, and the positioning core 320 is spaced apart from the connecting post 310; the positioning core 320 is inserted into the top of the positioning post 220.

[0043] Specifically, the top of the positioning post 220 is provided with an insertion hole, and the positioning core 320 is inserted into the insertion hole. The horizontal cross-section of the positioning core 320 is circular, and the insertion hole is a circular hole. The length of the positioning core 320 is less than the length of the connecting post 310.

[0044] The diameter of the positioning core 320 is smaller than the diameter of the insertion hole of the positioning post 220, which facilitates the guiding function during installation and helps the adsorption component 400 to position the main board 100.

[0045] In the optional solution provided by the present utility model embodiment, the cover plate 300 is provided with a second cavity 330 with an opening at the bottom, and the top wall of the second cavity 330 is provided with a connecting post 310; the outer wall of the opening end of the cover plate 300 is provided with an outwardly extending connecting protrusion 340, and the connecting protrusion 340 is connected to the top wall of the housing 200.

[0046] Specifically, the bottom wall of the cover plate 300 is recessed upward to form a second cavity 330 with an opening at the bottom; the connecting post 310 protrudes downward from the bottom wall of the second cavity 330. The outer wall of the open end of the cover plate 300 extends vertically outward to form a connecting protrusion 340.

[0047] The second cavity 330 reduces the weight of the cover plate 300 and provides space for the connecting post 310, ensuring that the length of the connecting post 310 is sufficient to install the adsorption component 400. The connecting protrusion 340 increases the contact area between the cover plate 300 and the top wall of the housing 200, thereby enhancing the connection strength between the cover plate 300 and the housing 200.

[0048] In the optional embodiments provided by this utility model, the connecting protrusion 340 is bonded to the top wall of the housing 200; and / or, the cover plate 300 is connected to the top wall of the housing 200 by fasteners.

[0049] Specifically, sealant is filled between the connecting protrusion 340 and the top wall of the housing 200 to achieve the connection between the connecting protrusion 340 and the top wall of the housing 200; or, the connecting protrusion 340 and the top wall of the housing 200 are connected by fasteners, which can be bolts; or, the connecting protrusion 340 and the top wall of the housing 200 are bonded by sealant while being connected by fasteners.

[0050] The connection between the protrusion 340 and the top wall of the housing 200 is bonded together and connected by fasteners, which ensures the connection strength between the housing 200 and the cover plate 300 and ensures the sealing of the first cavity 210.

[0051] In the optional solution provided by this utility model embodiment, the horizontal cross-sectional dimension of the positioning post 220 gradually increases from the end near the bottom wall of the first cavity 210 to the end away from the bottom wall of the first cavity 210.

[0052] Specifically, the horizontal cross-section of the positioning post 220 is circular, and the diameter of the positioning post 220 gradually increases from bottom to top along the vertical direction, so that the positioning post 220 can be inserted into the positioning hole 110 of the motherboard 100 and can support the motherboard 100 in the vertical direction.

[0053] In another embodiment, the positioning post 220 is cylindrical, and the side wall of the positioning post 220 is provided with a limiting protrusion that fits against the bottom wall of the main board 100.

[0054] In the optional solution provided by this utility model embodiment, the first cavity 210 of the housing 200 is square, and two positioning posts 220 are provided, which are respectively located at two opposite corners of the first cavity 210; two positioning holes 110 are provided, and the two positioning holes 110 and the two positioning posts 220 are inserted and fitted in a one-to-one correspondence.

[0055] Specifically, when there are two positioning posts 220, there are two positioning cores 320 on the cover plate 300, and the two positioning cores 320 are respectively inserted into the insertion holes of the two positioning posts 220.

[0056] The two positioning posts 220 are located at the two opposite corners of the first cavity 210, so that the cover plate 300 and the main board 100 can be positioned using only the two positioning posts 220.

[0057] The advantages of this on-board charger are explained in detail below: In this on-board charger, the mainboard 100 is fixed by the positioning post 220 on the housing 200 and the cover plate 300 connected by the silicone suction cup, eliminating the fastening screws and screw posts, and reducing the internal space pressure of the housing 200. The silicone suction cup material is elastic, which makes the vibration performance of the motherboard 100 better after installation; The reduction of screw studs is beneficial for cost reduction design of the die-cast housing 200 mold, and the removal of a large number of screw studs is beneficial for expanding the internal space of the housing 200. The method of pressing down the cover plate 300 to fix the main board 100 is more efficient than the screw fastening method.

[0058] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0059] 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. An on-board charger, characterized in that, include: Main board (100), housing (200), cover plate (300) and suction device (400); The housing (200) has a first cavity (210) with an opening at the top, and the bottom wall of the first cavity (210) is provided with a positioning post (220); the main board (100) is provided with a positioning hole (110), the main board (100) is installed in the first cavity (210), and the positioning post (220) is inserted into the positioning hole (110); The cover plate (300) is provided with a connecting post (310), and the adsorption member (400) is installed on the connecting post (310). The cover plate (300) with the connecting post (310) on one side covers the opening end of the housing (200) and is connected to the housing (200). The adsorption member (400) is adsorbed and connected to the main board (100).

2. The on-board charger according to claim 1, characterized in that, The adsorption element (400) is configured as a silicone suction cup.

3. The on-board charger according to claim 2, characterized in that, The adsorption element (400) is press-fitted or bonded to the connecting column (310).

4. The on-board charger according to claim 3, characterized in that, The connecting column (310) and the cover plate (300) are integrally formed.

5. The on-board charger according to claim 4, characterized in that, Multiple connecting posts (310) are provided, and the multiple connecting posts (310) are spaced apart, and each connecting post (310) is equipped with the adsorption element (400).

6. The on-board charger according to claim 1, characterized in that, The cover plate (300) is provided with a positioning core (320), and the positioning core (320) is spaced apart from the connecting post (310); The positioning core (320) is inserted into the top of the positioning post (220).

7. The on-board charger according to any one of claims 1-6, characterized in that, The cover plate (300) is provided with a second cavity (330) with an opening at the bottom, and the connecting post (310) is provided on the top wall of the second cavity (330). The outer wall of the opening end of the cover plate (300) is provided with an outwardly extending connecting protrusion (340), which is connected to the top wall of the housing (200).

8. The on-board charger according to claim 7, characterized in that, The connecting protrusion (340) is bonded to the top wall of the housing (200); And / or, the cover plate (300) is connected to the top wall of the housing (200) by fasteners.

9. The on-board charger according to claim 1, characterized in that, The horizontal cross-sectional dimension of the positioning post (220) gradually increases from one end near the bottom wall of the first cavity (210) to the end away from the bottom wall of the first cavity (210).

10. The on-board charger according to claim 1, characterized in that, The first cavity (210) of the housing (200) is square, and two positioning posts (220) are provided, with the two positioning posts (220) located at two opposite corners of the first cavity (210); There are two positioning holes (110), and the two positioning holes (110) are inserted into the two positioning posts (220) in a one-to-one correspondence.

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