Housing assembly and vehicle-mounted charger

Abstract

The application provides a shell assembly and a vehicle-mounted charger. The shell assembly comprises a base, a cover plate and a plurality of fixing columns. The base comprises a bottom wall and a plurality of side walls perpendicular to the bottom wall. The plurality of side walls are sequentially connected in a head-to-tail manner. An end of the side wall away from the bottom wall is provided with a plurality of fixing holes. The cover plate is provided with a plurality of mounting holes. The plurality of mounting holes correspond to the plurality of fixing holes one by one. The plurality of fixing columns correspond to the plurality of fixing holes one by one. The lower part of the fixing column is fixedly connected with the corresponding fixing hole. The upper part of the fixing column is fixedly connected with the cover plate after being deformed by extrusion. The lower part of the fixing column is first fixed with the fixing hole on the base, and then the upper part of the fixing column is extruded to fix the fixing column with the cover plate, so that the base and the cover plate are fixedly connected. The assembly process does not need to use screws, which is beneficial to improve the assembly efficiency of the shell and reduce the assembly risk.

Description

Technical Field

[0001] This application relates to mechanical parts manufacturing technology, and more particularly to a housing assembly and an on-board charger. Background Technology

[0002] An on-board charger (OBC) is a device that converts AC power to DC power. OBCs are installed in electric vehicles and plug-in hybrid electric vehicles to safely and automatically charge the vehicle's battery. An on-board charger mainly consists of a housing and related electronic components housed within it.

[0003] In the relevant technical solutions, the housing of the on-board charger includes a base and a cover plate. The base includes a bottom wall and multiple side walls perpendicular to the bottom wall, which are connected end to end. The cover plate is placed on the side walls. Specifically, the side walls opposite to the bottom wall have multiple threaded holes, and the cover plate has corresponding through holes. Fasteners such as screws are fixed in the corresponding threaded holes after passing through the through holes, thereby fixing the cover plate and the base together.

[0004] However, the assembly efficiency of the cover plate and base using the relevant technology is low, and there is a risk of improper assembly. Utility Model Content

[0005] In order to overcome the above-mentioned defects in related technologies, the purpose of this application is to provide a housing assembly and an on-board charger. This application is beneficial to improving the assembly efficiency of the housing and reducing the assembly risk.

[0006] On one hand, this application provides a housing assembly, including:

[0007] The base includes a bottom wall and multiple side walls perpendicular to the bottom wall. The multiple side walls are connected end to end in sequence, and multiple fixing holes are provided at the end of the side wall away from the bottom wall.

[0008] A cover plate, wherein the cover plate is provided with a plurality of mounting holes, and the plurality of mounting holes correspond one-to-one with the plurality of fixing holes;

[0009] Multiple fixing posts are provided, and each fixing post corresponds to a fixing hole. The lower part of each fixing post is fixedly connected to the corresponding fixing hole. The upper part of each fixing post is fixedly connected to the cover plate after being deformed by extrusion.

[0010] In one possible implementation, the lower part of the fixing post is interference-fitted with the corresponding fixing hole, and the upper part of the fixing post abuts against the side of the cover plate opposite to the bottom wall.

[0011] In one possible implementation, the fixing post includes a body and at least two flanges; the body and the flanges have a first state and a second state relative to each other; in the first state, the body is interference-fitted with the corresponding fixing hole, and in a plane parallel to the bottom wall, at least two of the flanges are located within the projection range of the body; in the second state, the body passes through the corresponding mounting hole, and at least two of the flanges abut against the side of the cover plate opposite to the bottom wall.

[0012] In one possible implementation, the base is a die-cast base and the cover plate is a sheet metal cover plate.

[0013] In one possible implementation, the lower part of the fixing post is interference-fitted with the corresponding fixing hole, and the upper part of the fixing post is interference-fitted with the corresponding mounting hole.

[0014] In one possible implementation, the lower part of the fixing post is integrally formed with the corresponding fixing hole, and the upper part of the fixing post is interference-fitted with the corresponding mounting hole.

[0015] In one possible implementation, the fixing post includes a body and a plurality of connecting ribs, the plurality of connecting ribs being spaced apart circumferentially along the body and radially along the fixing post, the sum of the diameter of the body and the size of the connecting ribs being greater than the inner diameter of the mounting hole, and the connecting ribs being interference-fitted with the mounting hole.

[0016] In one possible implementation, a first cavity is formed within the connecting rib.

[0017] In one possible implementation, the fixing post includes a body and a connecting segment connected together. Along the axial direction of the fixing post, the body is connected to the base. The connecting segment is disposed at the end of the body away from the base. The diameter of the connecting segment gradually decreases in the direction away from the base. The inner diameter of the mounting hole gradually decreases in the direction away from the base. Along the radial direction of the fixing post, the diameter of the connecting segment is larger than the inner diameter of the mounting hole. The connecting segment is interference-fitted with the mounting hole.

[0018] In one possible implementation, a second cavity is formed within the connecting segment.

[0019] In one possible implementation, the base is a die-cast base, and the cover plate is a die-cast cover plate.

[0020] In one possible implementation, the cover plate includes a flat plate portion and a plurality of protrusions, the plurality of protrusions extending from the flat plate portion in a direction away from the flat plate portion, the plurality of protrusions corresponding one-to-one with a plurality of sidewalls, wherein a plurality of mounting holes are located on the plurality of protrusions.

[0021] In one possible implementation, a first extension is provided at one end of the plurality of protrusions away from the flat plate portion, the first extension is provided parallel to the flat plate portion, and the plurality of mounting holes are correspondingly provided on the first extension.

[0022] In one possible implementation, a mounting flange is provided at the connection position of two adjacent protrusions and / or at the middle of the protrusion, and a plurality of mounting holes are correspondingly provided within the mounting flange.

[0023] In one possible implementation, a fastening post is provided at the connection position of two adjacent sidewalls and / or at the middle of the sidewall, and a plurality of fixing holes are correspondingly provided in the fastening post.

[0024] In one possible implementation, a second extension is provided at one end of the sidewall away from the bottom wall, the second extension is arranged parallel to the bottom wall, and a plurality of fixing holes are correspondingly provided on the second extension.

[0025] On the other hand, this application provides an on-board charger, including the housing assembly as described above.

[0026] This application provides a housing assembly and an on-board charger. The housing assembly includes a base, a cover plate, and multiple fixing posts. The base includes a bottom wall and multiple side walls perpendicular to the bottom wall, which are connected end-to-end. Each side wall has multiple fixing holes at its end facing away from the bottom wall. The cover plate has multiple mounting holes, each corresponding to one of the fixing holes. Similarly, each fixing post corresponds to one of the fixing holes. The lower part of each fixing post is fixedly connected to its corresponding fixing hole; the upper part of the fixing post is fixedly connected to the cover plate after being deformed by compression. This application achieves a fixed connection between the base and the cover plate by first fixing the lower part of the fixing post to the fixing holes on the base, and then fixing the upper part of the fixing post to the cover plate by compression. The assembly process eliminates the need for screws, improving assembly efficiency and reducing assembly risks. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A simplified structural diagram of a base provided in an embodiment of this application;

[0029] Figure 2A simplified structural diagram of a cover plate provided in one embodiment of this application;

[0030] Figure 3 A simplified structural diagram of a housing assembly provided in one embodiment of this application;

[0031] Figure 4 for Figure 3 Simplified structural diagram of the central fixed column;

[0032] Figure 5 for Figure 3 A simplified structural diagram of the retaining column in the housing assembly before extrusion;

[0033] Figure 6 for Figure 5 Simplified structural diagram of the central fixed column;

[0034] Figure 7 A simplified structural diagram of a housing assembly provided in another embodiment of this application;

[0035] Figure 8 In one implementation method Figure 7 Partial sectional view of the connection structure between the base, cover plate and fixing column;

[0036] Figure 9 for Figure 8 A simplified structural diagram of the fixed column and cover plate before compression in the embodiment shown;

[0037] Figure 10 In another implementation method Figure 7 Partial sectional view of the connection structure between the base, cover plate and fixing column;

[0038] Figure 11 for Figure 10 A simplified structural diagram of the fixed column and cover plate before compression in the embodiment shown.

[0039] Figure label:

[0040] 100 - Base; 110 - Bottom wall; 120 - Side wall; 121 - Fixing hole; 122 - Fitting post; 123 - Second extension;

[0041] 200 - Cover plate; 210 - Flat plate; 220 - Protrusion; 221 - Mounting hole; 222 - Mounting flange; 223 - First extension;

[0042] 300-Fixed column; 310-Body; 320-Flanged edge; 330-Connecting rib; 331-First cavity; 340-Connecting section; 341-Second cavity. Detailed Implementation

[0043] 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 some embodiments of this application, but not all embodiments.

[0044] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0045] As described in the background section, the related technical solutions using screws to assemble the base and cover of the on-board charger suffer from low assembly efficiency and the risk of incomplete assembly. Specifically, the base and cover of the on-board charger typically require 8-24 screws for assembly. These screws need to be tightened to lock the base and cover in place, a time-consuming and inefficient process. Furthermore, there is a risk of stripping the screw threads during tightening, resulting in incomplete assembly of the base and cover.

[0046] In view of this, the embodiments of this application aim to provide a housing assembly and an on-board charger, which have multiple fixing holes on the base and corresponding mounting holes on the cover plate. By first fixing the lower part of the fixing post to the fixing holes on the base, and then pressing the upper part of the fixing post to fix it to the cover plate, a fixed connection between the base and the cover plate is achieved. The assembly process does not require the use of screws, which helps to improve the assembly efficiency of the housing and reduce the assembly risk.

[0047] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can gain a more detailed understanding of the contents of this application.

[0048] Please refer to Figures 1-11 This embodiment provides a housing assembly, including:

[0049] The base 100 includes a bottom wall 110 and multiple side walls 120 perpendicular to the bottom wall 110. The side walls 120 are connected end-to-end, and each side wall 120 has multiple fixing holes 121 at its end facing away from the bottom wall 110. For example, as... Figure 1As shown, the base 100 of this embodiment includes a bottom wall 110 and four side walls 120. The four side walls 120 are all perpendicular to the bottom wall 110 and are connected end-to-end. The bottom wall 110 and the four side walls 120 together form a generally quadrangular prism-shaped base 100. The base 100 includes an opening opposite to the bottom wall 110, through which external parts can be inserted. Multiple fixing holes 121 are formed on one side of the side wall 120 (i.e., the end of the side wall 120 facing away from the bottom wall 110). The fixing holes 121 can be blind holes. Specifically, a fastening post 122 (i.e., a BOSS post) can be provided at the connection point of two adjacent side walls 120, and the fixing hole 121 can be located within the fastening post 122; and / or, a fastening post 122 can be provided in the middle of the side wall 120, and the fixing hole 121 can be located within the fastening post 122. In some embodiments, a second extension 123 is provided at one end of the sidewall 120 away from the bottom wall 110. The second extension 123 is arranged parallel to the bottom wall 110, and a plurality of fixing holes 121 are correspondingly provided on the second extension 123. Further, when the sidewall 120 is provided with a fastening post 122, the fastening post 122 may be provided on the second extension 123.

[0050] The cover plate 200 has a plurality of mounting holes 221, each corresponding to a plurality of fixing holes 121. For example, as shown... Figure 2As shown, the cover plate 200 of this embodiment includes a flat plate portion 210. The size and shape of the flat plate portion 210 are adapted to the size and shape of the bottom wall 110. The flat plate portion 210 can cover multiple side walls 120, and a mounting hole 221 can be formed within the flat plate portion 210. In other possible implementations, the cover plate 200 may also include multiple protrusions 220. The multiple protrusions 220 extend from the flat plate portion 210 in a direction away from the flat plate portion 210. The multiple protrusions 220 correspond one-to-one with multiple side walls 120. When the cover plate 200 is connected to the base 100, the multiple protrusions 220 abut against the multiple side walls 120 respectively. In this case, the mounting hole 221 can be provided at the end of the protrusion 220 away from the flat plate portion 210; the mounting hole 221 can extend to the flat plate portion 210, or the mounting hole 221 can only be within the protrusion 220. The mounting hole 221 can be a blind hole or a through hole. Specifically, a mounting flange 222 may be provided at the connection point of two adjacent protrusions 220, and a mounting hole 221 may be provided within the mounting flange 222; and / or, a mounting flange 222 may be provided at the middle of the protrusion 220, and a mounting hole 221 may be provided within the mounting flange 222. In some embodiments, a first extension 223 is provided at one end of the plurality of protrusions 220 away from the flat plate portion 210, the first extension 223 is provided parallel to the flat plate portion 210, and the plurality of mounting holes 221 are correspondingly provided in the first extension 223. Further, when the protrusion 220 is provided with a mounting flange 222, the mounting flange 222 may be provided on the first extension 223.

[0051] Multiple fixing posts 300 are provided, each corresponding to a fixing hole 121. The lower part of the fixing post 300 is fixedly connected to the corresponding fixing hole 121; for example, the connection can be made by interference fit, integral molding, or other methods. The upper part of the fixing post 300 is fixedly connected to the cover plate 200 after being deformed by extrusion; for example, the connection can be made by interference fit, snap-fit, or other methods.

[0052] In this embodiment, during assembly, the lower parts of the multiple fixing posts 300 can be first connected and fixed to the multiple fixing holes 121 on the base 100. Then, the upper parts of the multiple fixing posts 300 are deformed by extrusion deformation, thereby connecting and fixing to the multiple mounting holes 221 on the cover plate 200. This embodiment can extrude and deform multiple fixing posts 300 simultaneously, thereby improving assembly efficiency.

[0053] As described above, this embodiment first fixes the lower part of the fixing post 300 to the fixing hole 121 on the base 100, and then fixes the fixing post 300 to the cover plate 200 by pressing the upper part of the fixing post 300, thereby achieving a fixed connection between the base 100 and the cover plate 200. The assembly process does not require the use of screws, which helps improve the assembly efficiency of the housing and reduces assembly risks.

[0054] Please continue to refer to Figures 3-6 In one possible implementation, the lower part of the fixing post 300 in this embodiment is interference-fitted with the corresponding fixing hole 121, and the upper part of the fixing post 300 abuts against the side of the cover plate 200 away from the bottom wall 110. That is, the mounting hole 221 in this embodiment is a through hole, and the fixing post 300 passes through the mounting hole 221 and abuts against the cover plate 200, thereby connecting the base 100 and the cover plate 200 into one unit through the fixing post 300.

[0055] Specifically, the fixing post 300 in this embodiment includes a body 310 and at least two flanges 320. The body 310 and the flanges 320 have a first state and a second state relative to each other. Figure 5 and Figure 6 As shown, in the first state, the body 310 is interference-fitted with the corresponding fixing hole 121, and in a plane parallel to the bottom wall 110, at least two flanges 320 are located within the projection range of the body 310. Figure 3 and Figure 4 As shown, in the second state, the body 310 passes through the corresponding mounting hole 221, and at least two flanges 320 abut against the side of the cover plate 200 away from the bottom wall 110.

[0056] It is understood that in this embodiment, the diameter of the body 310 can be slightly larger than the inner diameter of the fixing hole 121, so that the body 310 and the corresponding fixing hole 121 can be press-fitted together. After the body 310 and the fixing hole 121 are engaged, the body 310 can pass through the corresponding mounting hole 221 on the cover plate 200, so that the flange 320 is positioned on the side of the cover plate 200 away from the bottom wall 110 (e.g., Figure 5 (As shown). Then, an external fixture, such as a press, can be used to simultaneously press the flanges 320 on multiple fixed posts 300, causing the flanges 320 to deform and abut against the cover plate 200 (as shown). Figure 3 (As shown). In this embodiment, the base 100 and the cover plate 200 are connected as a whole by the interference fit between the body 310 and the fixing hole 121 and the flange 320 abutting against the side of the cover plate 200 away from the bottom wall 110.

[0057] like Figure 6 As shown in this embodiment, the multiple flanges 320 on the fixed column 300 (four are shown in the figure, but there may be two, three, five, etc. in other possible embodiments) have a certain gap between them before deformation. This gap allows the flanges 320 to be unconnected to each other, thereby facilitating deformation under the action of external force to form... Figure 4 The structure shown.

[0058] In this embodiment, the base 100 is a die-cast base 100, and the cover plate 200 is a sheet metal cover plate 200. The sheet metal cover plate 200 is relatively thin, thereby ensuring that sufficient fixing force can be generated when the flange 320 abuts against the side of the cover plate 200 away from the bottom wall 110. In this embodiment, the fixing post 300 can be designed as a standard part or a universal part, which is more flexible in use and has a wider range of applications.

[0059] Please continue to refer to Figures 7-9 In another possible implementation, the lower part of the fixing post 300 in this embodiment is interference-fitted with the corresponding fixing hole 121, and the upper part of the fixing post 300 is interference-fitted with the corresponding mounting hole 221. That is, the mounting hole 221 in this embodiment is a blind hole, and both ends of the fixing post 300 are interference-fitted with the corresponding fixing hole 121 and mounting hole 221 respectively, thereby connecting the base 100 and the cover plate 200 into one unit through the fixing post 300.

[0060] Alternatively, the lower part of the fixing post 300 is integrally formed with the corresponding fixing hole 121, and the upper part of the fixing post 300 is interference-fitted with the corresponding mounting hole 221. In this case, the mounting hole 221 in this embodiment is still a blind hole, and the fixing post 300 is interference-fitted with the corresponding mounting hole 221, thereby connecting the base 100 and the cover plate 200 into one piece through the fixing post 300.

[0061] like Figure 8 As shown, in one possible implementation, the fixing post 300 of this embodiment includes a body 310 and a plurality of connecting ribs 330, which are spaced apart circumferentially along the body 310. Along the radial direction of the fixing post 300, the sum of the diameter of the body 310 and the dimensions of the connecting ribs 330 is greater than the inner diameter of the mounting hole 221, and the connecting ribs 330 are interference-fitted with the mounting hole 221.

[0062] In this embodiment, multiple fixing posts 300 can be first assembled onto the base 100 to form... Figure 9 The structure shown. Specifically, as... Figure 8 As shown, the diameter of the body 310 can be slightly larger than the inner diameter of the fixing hole 121, so that the body 310 and the corresponding fixing hole 121 can be press-fitted together. After the body 310 and the base 100 are assembled, the cover plate 200 can be placed on the fixing post 300. By pressing the cover plate 200, the connecting rib 330 is deformed, thereby achieving an interference fit with the mounting hole 221.

[0063] like Figure 8 As shown, in this embodiment, a first cavity 331 is formed inside the connecting rib 330. By setting the first cavity 331, the mass and strength of the connecting rib 330 can be reduced, making the connecting rib 330 more likely to deform under the action of external force.

[0064] like Figure 10 As shown, in another possible embodiment, the fixing post 300 includes a body 310 and a connecting section 340 connected together. Along the axial direction of the fixing post 300, the body 310 is connected to the base 100, and the connecting section 340 is disposed at the end of the body 310 facing away from the base 100. The diameter of the connecting section 340 gradually decreases in the direction facing away from the base 100, and the inner diameter of the mounting hole 221 also gradually decreases in the direction facing away from the base 100. Along the radial direction of the fixing post 300, the diameter of the connecting section 340 is larger than the inner diameter of the mounting hole 221, and the connecting section 340 is interference-fitted with the mounting hole 221.

[0065] In this embodiment, multiple fixing posts 300 can be first assembled onto the base 100 to form... Figure 11 The structure shown. Specifically, as... Figure 10 As shown, the body 310 can be integrally formed with the corresponding fixing hole 121, for example, by casting. Alternatively, the diameter of the body 310 can be slightly larger than the inner diameter of the fixing hole 121, so that the body 310 and the corresponding fixing hole 121 can be press-fitted together. After the body 310 and the base 100 are assembled, the cover plate 200 can be placed on the fixing post 300. Pressing the cover plate 200 causes the connecting section 340 to deform, thereby achieving an interference fit with the mounting hole 221.

[0066] like Figure 10 As shown, in this embodiment, a second cavity 341 is formed inside the connecting segment 340. By setting the second cavity 341, the mass and strength of the connecting segment 340 can be reduced, making the connecting segment 340 more susceptible to deformation under external force.

[0067] In this embodiment, the base 100 is a die-cast base 100, and the cover plate 200 is a die-cast cover plate 200. The die-cast cover plate 200 is relatively thick, so it can be press-fitted with the mounting hole 221 on the cover plate 200 by the extrusion deformation of the fixing column 300, so as to ensure the connection stability of the base 100 and the cover plate 200.

[0068] This embodiment also provides an on-board charger, including the aforementioned housing assembly.

[0069] It is understood that, since the on-board charger of this embodiment uses the above-mentioned housing assembly, there is no need to use screws to assemble the housing, which helps to improve the assembly efficiency of the housing and reduce the assembly risk.

[0070] In this application, the shapes of the fixing post 300 and the mounting hole 221 are not limited to the above description, depending on the actual application. As long as the fixing post 300 can be tightly coupled with the mounting hole 221 after being deformed by force, these are not intended to limit this application.

[0071] The housing assembly of this application has the following advantages:

[0072] (1) It can realize screwless fixing of die-cast base and sheet metal cover plate, die-cast base and die-cast cover plate, improve product production efficiency and reduce the quality risks caused by screw assembly.

[0073] (2) By the force / extrusion deformation of the fixed column 300, the fixed column 300 and the mounting hole 221 of the cover plate 200 are tightly connected, which improves the stability of the fixed base 100 and the cover plate 200 and is suitable for occasions with high anti-vibration performance requirements such as vehicle chargers.

[0074] (3) The fixed column 300 can be designed separately or integrally formed with the base 100, which has the characteristics of convenient assembly, flexible use and wide applicability.

[0075] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.

[0076] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] It should be noted that in the description of this application, the terms "first" and "second" are used only for convenience in describing different components and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0078] The embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0079] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this application, 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.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A housing assembly, characterized in that, include: The base includes a bottom wall and multiple side walls perpendicular to the bottom wall. The multiple side walls are connected end to end in sequence, and the side walls are provided with multiple fixing holes at the end opposite to the bottom wall. A cover plate, wherein the cover plate is provided with a plurality of mounting holes, and the plurality of mounting holes correspond one-to-one with the plurality of fixing holes; Multiple fixing posts are provided, and each fixing post corresponds to a fixing hole. The lower part of each fixing post is fixedly connected to the corresponding fixing hole. The upper part of each fixing post is fixedly connected to the cover plate after being deformed by extrusion.

2. The housing assembly according to claim 1, characterized in that, The lower part of the fixing post is interference-fitted with the corresponding fixing hole, and the upper part of the fixing post abuts against the side of the cover plate away from the bottom wall.

3. The housing assembly according to claim 2, characterized in that, The fixing post includes a body and at least two flanges; the body and the flanges have a first state and a second state relative to each other; in the first state, the body is interference-fitted with the corresponding fixing hole, and in a plane parallel to the bottom wall, at least two flanges are located within the projection range of the body; in the second state, the body passes through the corresponding mounting hole, and at least two flanges abut against the side of the cover plate away from the bottom wall.

4. The housing assembly according to claim 3, characterized in that, The base is a die-cast base, and the cover plate is a sheet metal cover plate.

5. The housing assembly according to claim 1, characterized in that, The lower part of the fixing post is interference-fitted with the corresponding fixing hole, and the upper part of the fixing post is interference-fitted with the corresponding mounting hole.

6. The housing assembly according to claim 1, characterized in that, The lower part of the fixing post is integrally formed with the corresponding fixing hole, and the upper part of the fixing post is interference-fitted with the corresponding mounting hole.

7. The housing assembly according to claim 5 or 6, characterized in that, The fixing column includes a body and a plurality of connecting ribs. The plurality of connecting ribs are spaced apart circumferentially along the body. Along the radial direction of the fixing column, the sum of the diameter of the body and the size of the connecting ribs is greater than the inner diameter of the mounting hole. The connecting ribs are interference-fitted with the mounting hole.

8. The housing assembly according to claim 7, characterized in that, A first cavity is formed inside the connecting rib.

9. The housing assembly according to claim 5 or 6, characterized in that, The fixing post includes a body and a connecting section connected together. Along the axial direction of the fixing post, the body is connected to the base. The connecting section is located at the end of the body away from the base. The diameter of the connecting section gradually decreases in the direction away from the base. The inner diameter of the mounting hole gradually decreases in the direction away from the base. Along the radial direction of the fixing post, the diameter of the connecting section is larger than the inner diameter of the mounting hole. The connecting section is interference-fitted with the mounting hole.

10. The housing assembly according to claim 9, characterized in that, A second cavity is formed within the connecting section.

11. The housing assembly according to claim 5 or 6, characterized in that, The base is a die-cast base, and the cover plate is a die-cast cover plate.

12. The housing assembly according to claim 1, characterized in that, The cover plate includes a flat plate portion and a plurality of protrusions. The plurality of protrusions extend from the flat plate portion in a direction away from the flat plate portion. The plurality of protrusions correspond one-to-one with the plurality of sidewalls, wherein the plurality of mounting holes are located on the plurality of protrusions.

13. The housing assembly according to claim 12, characterized in that, Each of the protrusions has a first extension at one end away from the flat plate. The first extension is parallel to the flat plate, and the plurality of mounting holes are correspondingly provided on the first extension.

14. The housing assembly according to claim 12, characterized in that, A mounting flange is provided at the connection position of two adjacent protrusions and / or at the middle of the protrusion, and a plurality of mounting holes are correspondingly provided in the mounting flange.

15. The housing assembly according to claim 1 or 14, characterized in that, A fastening post is provided at the connection position of two adjacent sidewalls and / or at the middle of the sidewall, and a plurality of fixing holes are correspondingly provided in the fastening post.

16. The housing assembly according to claim 1 or 13, characterized in that, A second extension is provided at one end of the side wall away from the bottom wall. The second extension is parallel to the bottom wall, and a plurality of fixing holes are correspondingly provided on the second extension.

17. An on-board charger, characterized in that, Includes the housing assembly as described in any one of claims 1-16.

Images