A plastic housing for facilitating the securing of a metal sheet
By designing circular cavities and casting holes in the plastic shell, and combining the use of adhesives and epoxy resin, the connection strength between the metal sheet and the plastic shell is enhanced, solving the fixation problem in high vibration environments and achieving better connection stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO CHENGZHAN PRECISION MASCH CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-21
AI Technical Summary
In existing technologies, the connection strength between the metal sheet and the plastic shell is insufficient, which cannot meet the requirements of high-vibration driving environments.
A plastic housing was designed, comprising a circular cavity and a casting hole. After the metal sheet is pre-fixed with glue, epoxy resin is poured in. The connection strength is enhanced by the combination of protrusions and injection holes, and axial restraint is provided after the epoxy resin solidifies.
The connection strength between the metal sheet and the plastic shell has been improved, making it suitable for high-vibration driving environments and enhancing the fixation effect under high-vibration conditions.
Smart Images
Figure CN224537232U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of new energy battery accessory technology, and more specifically to a plastic shell that facilitates the fixing of metal sheets. Background Technology
[0002] Electric vehicle batteries are chemical batteries, including rechargeable batteries. Currently, the mainstream rechargeable batteries in the automotive industry are lithium-ion batteries, which provide the energy source for the electric motors that drive the vehicles.
[0003] Patent document (CN206976448U) discloses a lithium battery for new energy electric vehicles, including a positive electrode connection post and a negative electrode connection post. In the prior art, the positive and negative electrode connection posts are connected to an electrode base. An existing electrode base includes a metal sheet and a plastic shell. The plastic shell has a cavity for accommodating the metal sheet. To place the metal sheet within the cavity, metal adhesive is applied to the side of the metal sheet near the cavity, bonding it to the bottom wall of the cavity. However, in off-road or sports vehicles, because the car needs to operate in high-vibration conditions, the connection strength of various components inside the vehicle is higher than that of components in passenger vehicles. This places higher demands on the connection strength between the metal sheet and the plastic shell.
[0004] Therefore, there is a need for a plastic housing that provides better connection strength, is suitable for high-vibration driving situations, and is easy to fix the metal sheet. Summary of the Invention
[0005] The main objective of this application is to provide a plastic housing for easily fixing a metal sheet. The plastic housing includes a housing body and a metal sheet. The housing body is square, with a circular cavity at one end. The sidewall of the circular cavity has four casting holes, located at the four corners of the housing body. The casting holes are stepped holes, with the larger diameter end of each hole close to the bottom wall of the circular cavity. The bottom wall of the circular cavity has a through hole. The metal sheet is annular and is placed within the circular cavity. Inside the concave cavity, the end face of the metal sheet is bonded to the bottom wall of the circular concave cavity, and the side wall of the metal sheet is attached to the side wall of the circular concave cavity. The outer edge of the end of the metal sheet away from the bottom wall of the circular concave cavity has four shallow grooves. The smaller diameter end of each casting hole is connected to a corresponding shallow groove. Pre-fixation is achieved by adhesive bonding. Epoxy resin is poured into the casting hole and shallow grooves. After the epoxy resin solidifies, the metal sheet is fixed. Compared with the prior art, it has the advantages of better connection strength and suitability for high-vibration driving situations.
[0006] Another objective of this application is to provide a plastic housing for easy fixing of a metal sheet, wherein the bottom wall of the circular cavity has a plurality of injection holes, and the side of the metal sheet near the bottom wall of the circular cavity has a plurality of protrusions, the protrusions corresponding one-to-one with the injection holes, and one protrusion extending into each injection hole.
[0007] To achieve at least one of the above-mentioned objectives, this application provides a plastic housing for facilitating the fixing of a metal sheet, wherein the plastic housing for facilitating the fixing of the metal sheet comprises:
[0008] The outer shell body is square in shape. One end of the outer shell body has a circular cavity. The side wall of the circular cavity has four casting holes. The four casting holes are located at the four corners of the outer shell body. The casting holes are stepped holes, and the end of the casting hole with the larger diameter is close to the bottom wall of the circular cavity. The bottom wall of the circular cavity has a through hole.
[0009] A metal sheet, which is circular in shape, is placed inside a circular cavity. The end face of the metal sheet is bonded to the bottom wall of the circular cavity, and the side wall of the metal sheet is in contact with the side wall of the circular cavity. The outer edge of the end of the metal sheet away from the bottom wall of the circular cavity has four shallow grooves. The smaller diameter end of each casting hole is connected to a corresponding shallow groove.
[0010] In one or more embodiments of this application, the bottom wall of the circular cavity has a plurality of injection holes, and the side of the metal sheet near the bottom wall of the circular cavity has a plurality of protrusions, each protrusion corresponding to one of the injection holes, and each injection hole contains one protrusion.
[0011] In one or more embodiments of this application, the diameter of the through hole is larger than the diameter of the inner hole of the metal sheet.
[0012] In one or more embodiments of this application, the outer casing body has four feet at one end opposite to the circular cavity.
[0013] In one or more embodiments of this application, the four corners of the outer casing body are rounded.
[0014] In one or more embodiments of this application, the outer casing body has a raised portion at one end away from the foot pad, and the raised portion is located on the outside of the metal sheet.
[0015] In one or more embodiments of this application, each pair of adjacent casting holes has a glue injection hole.
[0016] In this embodiment, the plastic shell for securing the metal sheet includes a shell body and a metal sheet. The shell body is square, with a circular cavity at one end. The sidewall of the circular cavity has four casting holes, located at the four corners of the shell body. The casting holes are stepped, with the larger diameter end of each hole close to the bottom wall of the circular cavity. The bottom wall of the circular cavity has a through hole. The metal sheet is annular and is placed inside the circular cavity. The end face of the metal sheet is bonded to the bottom wall of the circular cavity, and the sidewall of the metal sheet is in contact with the sidewall of the circular cavity. The outer edge of the end of the metal sheet away from the bottom wall of the circular cavity has four shallow grooves. The smaller diameter end of each casting hole is connected to a corresponding shallow groove. Pre-fixation is achieved by adhesive bonding. Epoxy resin is injected into the casting holes and shallow grooves. After the epoxy resin solidifies, the metal sheet is secured. Compared with the prior art, this design offers advantages such as better connection strength and suitability for high-vibration driving scenarios. Attached Figure Description
[0017] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:
[0018] Figure 1 The figure shows a schematic diagram of the structure of a plastic shell for facilitating the fixing of a metal sheet at a certain angle according to this application;
[0019] Figure 2 The diagram shows Figure 1 A magnified view of a portion at point C;
[0020] Figure 3 The figure shows a schematic diagram of the structure of a plastic shell for facilitating the fixing of a metal sheet, as described in this application, from another angle.
[0021] Figure 4 The diagram illustrates the structure of the outer shell at a certain angle.
[0022] Figure 5 The diagram shows Figure 4 A magnified view of a portion of point D. Detailed Implementation
[0023] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.
[0024] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0025] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0026] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.
[0027] A schematic representation of a plastic housing for securing metal sheets, see reference. Figures 1 to 5 A preferred embodiment of the present invention provides a plastic housing for facilitating the fixing of a metal sheet, comprising a housing body 10 and a metal sheet 20.
[0028] Specifically, such as Figure 4 and Figure 5 As shown, the outer shell body 10 is square, and one end of the outer shell body 10 has a circular cavity 101. The side wall of the circular cavity 101 has four casting holes 102, which are located at the four corners of the outer shell body 10. The casting holes 102 are stepped holes, and the larger diameter end of the casting hole 102 is close to the bottom wall of the circular cavity 101. The bottom wall of the circular cavity 101 has a through hole 103. The metal sheet 20 is annular and is placed inside the circular cavity 101. The end face of the metal sheet 20 is bonded to the bottom wall of the circular cavity 101, and the side wall of the metal sheet 20 is in contact with the side wall of the circular cavity 101. Figure 1 and Figure 2 As shown, the outer edge of the metal sheet 20 away from the bottom wall of the circular cavity 101 has four shallow grooves 201, and the smaller diameter end of each casting hole 102 is connected to a corresponding shallow groove 201.
[0029] It should be noted that during assembly, the assembler first applies high-melting-point polyurethane adhesive to the back of the metal sheet 20, and then places the metal sheet 20 into the circular cavity 101 to achieve pre-fixation and bonding between the metal sheet 20 and the circular cavity 101. It should be pointed out that at this time, one end of the smaller diameter of each casting hole 102 should be connected to the corresponding shallow groove 201. Then, the casting hole 102 is aligned and epoxy resin is poured in, and the epoxy resin fills the casting hole 102 and the shallow groove 201. Then, it is placed in an oven and dried at 60°C for a predetermined number of hours. After the epoxy resin solidifies, the larger diameter end of the casting hole 102 is placed to restrict the solidified epoxy resin from coming out of the casting hole 102. The epoxy resin solidified in the shallow groove 201 will restrict the metal sheet 20 from detaching from the circular cavity 101. It is evident that, compared to existing technologies that rely solely on adhesive bonding without any structural constraint in the axial direction, this application achieves better connection strength and suitability for high vibrations by bonding and then using solidified epoxy resin to axially constrain the metal sheet 20.
[0030] Furthermore, to ensure the adhesive is applied more thoroughly to one side of the metal sheet 20, such as... Figure 4 As shown, the bottom wall of the circular cavity 101 has a plurality of glue injection holes 1011, and the side of the metal sheet 20 near the bottom wall of the circular cavity 101 has a plurality of protrusions (not shown in the figure). The protrusions correspond one-to-one with the glue injection holes 1011, and a protrusion extends into each glue injection hole 1011.
[0031] It should be noted that after applying polyurethane adhesive to one side of the metal sheet 20, adhesive can also be injected into the injection hole 1011. When the metal sheet 20 is placed into the circular cavity 101, each of the protrusions extends into the corresponding injection hole 1011. After the adhesive solidifies, the contact area between the metal sheet 20 and the outer shell body 10 is larger, that is, the side wall surface area of the protrusions is increased, resulting in better connection strength.
[0032] Furthermore, the diameter of the through hole 103 is larger than the diameter of the inner hole of the metal sheet 20, providing space for placing the external connecting post.
[0033] Additionally, in this application, such as Figure 3 As shown, the outer shell body 10 has four feet 104 at one end away from the circular cavity 101. All four corners of the outer shell body 10 are rounded.
[0034] In addition, such as Figure 4 As shown, the outer shell body 10 has a raised portion 105 at one end away from the foot pad 104, and the raised portion 105 is located on the outside of the metal sheet 20.
[0035] Furthermore, in the application, such as Figure 4 As shown, each of the two adjacent casting holes 102 has a glue injection hole 1011.
[0036] In summary, the plastic housing for facilitating the fixing of metal sheets described in the embodiments of this application has been clarified, which provides advantages such as better connection strength and suitability for high-vibration driving situations.
[0037] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.
Claims
1. A plastic housing for easy fixing of a metal sheet, characterized in that: The plastic housing that facilitates fixing the metal sheet includes The outer shell body is square in shape. One end of the outer shell body has a circular cavity. The side wall of the circular cavity has four casting holes. The four casting holes are located at the four corners of the outer shell body. The casting holes are stepped holes, and the end of the casting hole with the larger diameter is close to the bottom wall of the circular cavity. The bottom wall of the circular cavity has a through hole. A metal sheet, which is circular in shape, is placed inside a circular cavity. The end face of the metal sheet is bonded to the bottom wall of the circular cavity, and the side wall of the metal sheet is in contact with the side wall of the circular cavity. The outer edge of the end of the metal sheet away from the bottom wall of the circular cavity has four shallow grooves. The smaller diameter end of each casting hole is connected to a corresponding shallow groove.
2. The plastic housing for facilitating the fixing of metal sheets according to claim 1, characterized in that: The bottom wall of the circular cavity has several injection holes, and the side of the metal sheet near the bottom wall of the circular cavity has several protrusions. Each protrusion corresponds to one of the injection holes, and one protrusion extends into each injection hole.
3. The plastic housing for facilitating the fixing of metal sheets according to claim 2, characterized in that: The diameter of the through hole is larger than the diameter of the inner hole of the metal sheet.
4. The plastic housing for facilitating the fixing of metal sheets according to claim 3, characterized in that: The outer shell body has four feet at one end away from the circular cavity.
5. The plastic housing for facilitating the fixing of metal sheets according to claim 4, characterized in that: The four corners of the outer shell are all rounded.
6. The plastic housing for facilitating the fixing of metal sheets according to claim 5, characterized in that: The outer casing body has a raised portion at the end opposite to the foot pad, and the raised portion is located on the outside of the metal sheet.
7. The plastic housing for facilitating the fixing of metal sheets according to claim 2, characterized in that: Each pair of adjacent casting holes has a glue injection hole.