Insert structure and inverter
By adding filling holes on the conductive strip, the outer shells are connected to each other, the problem of cracking of the injection molded parts of the insert is solved, the strength and pressure resistance of the insert structure are improved, the cost is reduced, and stress is released when the temperature changes.
Patent Information
- Application Number
- CN202420643456.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The cracking problem of insert injection molded parts leads to electrical gaps and affects the insulation voltage resistance of the controller. The existing technology is difficult to effectively solve this problem, and the cost is high or the structural space is limited.
An insert structure is designed, and filling holes are added to the conductive strip to make the outer shells interconnected, strengthen the strength of the outer shell, and improve the resistance of the insert structure to cracks, while no need to change the outer shell material and reduce costs.
It effectively improves the resistance of the insert structure to crack, reduces the cost of the outer shell, and does not occupy additional space volume. At the same time, it can release stress through free deformation of the plastic when the temperature changes.
Smart Images
Figure CN222826645U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of insert injection molding parts, in particular to an insert structure and an inverter. Background Art
[0002] Insert injection molding is an important component of power electronic controllers. Plastic wrapped copper busbars can play an insulating and heat-insulating role. The problem of insert plastic cracking has always been a pain point in the industry and a technical difficulty. The electrical clearance problem caused by cracking will cause the insulation withstand voltage failure of the controller.
[0003] In the related art, the following measures are generally taken to solve the problem of insert cracking: 1) Replace the plastic raw materials, such as using polyphenylene sulfide (PPS) to replace polybutylene terephthalate (PBT), which has better effects but higher costs; 2) Change the injection molding process: such as changing the number, shape, and position of the gates in the mold, which has little effect; 3) Add reinforcement ribs around the plastic, but there are limitations on the structural space and the effect is not good.
[0004] Therefore, in order to solve the cracking problem of insert injection molded parts, shorten the development cycle, and save development costs, a structure that effectively prevents the insert plastic from cracking is urgently needed. Summary of the invention
[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide an insert structure and an inverter, which can effectively solve the problem of cracking of the insert structure body while saving development costs.
[0006] The utility model discloses an insert structure, which includes:
[0007] A conductive row body, wherein the conductive row body is provided with a filling hole;
[0008] An outer shell, the outer shell is coated on the conductive bar, and a portion of the outer shell is filled in the filling hole;
[0009] The thermal expansion coefficient of the conductive row body is different from the thermal expansion coefficient of the outer shell body.
[0010] The insert structure adds a filling hole on the conductive row body, and the outer shells on both sides of the conductive row body are connected to each other through the filling hole, so that the strength of the outer shell is strengthened, and the ability of the insert structure to resist cracking is effectively improved. At the same time, the structural design does not require changes to the material of the outer shell, which can effectively reduce the cost of the outer shell, and does not require additional parts to occupy the overall space volume.
[0011] Furthermore, the diameter of the filling hole is D, and the thickness of the conductive row body along the axis direction where the filling hole is located is d, wherein D≥d.
[0012] Further, the number of the filling holes is two.
[0013] Furthermore, two filling holes are arranged in mirror symmetry along the central axis of the conductive row body in the length direction, so as to separate the conductive row body into a first row body portion, a second row body portion and a third row body portion, wherein the shape of the first row body portion is the same as the shape of the third row body portion.
[0014] Furthermore, two filling holes are arranged side by side on the central axis of the conductive row body in the width direction, so as to separate the conductive row body into a fourth row body portion and a fifth row body portion, wherein the fourth row body portion and the fifth row body portion have the same shape.
[0015] Furthermore, the conductive bus has a first surface, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface, and the outer shell covers the first surface, the second surface and the third surface of the conductive bus.
[0016] Furthermore, the first surface and the second surface are parallel to each other.
[0017] Furthermore, the conductive busbar includes a copper busbar.
[0018] Furthermore, the outer shell is made of plastic material.
[0019] The embodiment of the utility model further discloses an inverter, comprising the above-mentioned insert structure.
[0020] The insert structure provided by the utility model has the following beneficial effects, including but not limited to:
[0021] 1) The insert structure adds a filling hole on the conductive row body, and the outer shells on both sides of the conductive row body are connected to each other through the filling hole, so that the strength of the outer shell is strengthened, and the ability of the insert structure to resist cracking is effectively improved. At the same time, the structural design does not require changes to the material of the outer shell, which can effectively reduce the cost of the outer shell, and does not require additional parts to occupy the overall space volume;
[0022] 2) The outer shell in the insert structure only covers the first surface, the second surface and the third surface of the conductive row body, and the first surface and the second surface are parallel to each other. This structure enables the outer shell on the first surface and the outer shell on the second surface of the insert structure to release stress through free deformation of the plastic when the temperature changes. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:
[0024] Figure 1 One of the cross-sectional views of the insert structure provided in Example 1 of the utility model;
[0025] Figure 2 The second cross-sectional view of the insert structure provided in Example 1 of the utility model;
[0026] Figure 3 The third cross-sectional view of the insert structure provided in Example 1 of the utility model;
[0027] Figure 4 A schematic diagram of the structure of the insert structure provided in Example 2 of the utility model;
[0028] Figure 5 This is a side view of the insert structure provided in Example 2 of the utility model.
[0029] Icon: 100-insert structure; 11-conductive row body; 111-first surface; 112-second surface; 113-third surface; 114-fourth surface; 115-fifth surface; 117-filling hole; 12-outer shell; 131-first row body; 132-second row body; 133-third row body; 134-fourth row body; 135-fifth row body. DETAILED DESCRIPTION
[0030] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.
[0031] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0032] Please refer to Figure 1 and Figure 4The embodiment of the utility model provides an insert structure 100, which includes a conductive row body 11 and an outer shell 12. The conductive row body 11 is provided with a filling hole 117. The outer shell 12 is coated on the conductive row body 11, and the outer shell 12 partially fills the filling hole 117. The thermal expansion coefficient of the conductive row body 11 is different from the thermal expansion coefficient of the outer shell 12.
[0033] It is worth noting that the insert structure 100 adds a filling hole 117 on the conductive bus 11, and the outer shells 12 on both sides of the conductive bus 11 are connected to each other through the filling hole 117, so that the strength of the outer shell 12 is strengthened, and the ability of the insert structure 100 to resist cracking is effectively improved. At the same time, the structural design does not require changes to the material of the outer shell 12, which can effectively reduce the cost of the outer shell 12, and does not require additional parts to occupy the overall space volume.
[0034] In this embodiment, the diameter of the filling hole 117 is D, and the thickness of the conductive bus 11 along the axial direction of the filling hole 117 is d, wherein D≥d.
[0035] It is worth noting that the diameter of the filling hole 117 is greater than or equal to the thickness of the conductive bus 11 , which can ensure that there is enough space and contact area when connecting the outer shell 12 on both sides of the conductive bus 11 to ensure the connectivity and stability between the outer shell 12 and the filling hole 117 .
[0036] like Figure 1-Figure 3 As shown, the number of the filling holes 117 in this embodiment is two. It can be understood that the design of two filling holes 117 helps to simplify the manufacturing and assembly process, which provides a relatively simple way to ensure that the outer shell 12 is correctly connected to the conductive bus 11. In addition, according to different specific implementation environments, the number of the filling holes 117 can also be three, four, etc. This embodiment does not constitute a limitation on the number of the filling holes 117, but is only an example of its number.
[0037] Please refer again Figure 2 The two filling holes 117 are arranged mirror-symmetrically along the central axis of the conductive row body 11 in the length direction, so as to separate the conductive row body 11 into a first row body part 131, a second row body part 132 and a third row body part 133, wherein the shape of the first row body part 131 is the same as the shape of the third row body part 133.
[0038] Meanwhile, two filling holes 117 are arranged side by side on the central axis of the conductive row body 11 in the width direction, so as to separate the conductive row body 11 into a fourth row body portion 134 and a fifth row body portion 135 , wherein the fourth row body portion 134 and the fifth row body portion 135 have the same shape.
[0039] It is worth noting that by setting the filling holes 117 in a mirror-symmetrical manner, the partitions of the conductive row 11 in the length and width directions can be made more symmetrical and balanced, which helps to maintain the stability and firmness of the overall structure. At the same time, the shapes of the first row body 131 and the third row body 133 are the same, and the shapes of the fourth row body 134 and the fifth row body 135 are also the same, which helps to simplify the manufacturing process and improve the consistency and quality of the product. During the experiment, the conductive row 11 was divided into 3 areas in the X direction and 2 areas in the Y direction by punching. During the high and low temperature test, the stress of the first row body 131, the second row body 132 and the third row body 133 in the X direction and the stress of the fourth row body 134 and the fifth row body 135 in the Y direction were all smaller than those of the related products before punching.
[0040] like Figure 4 and Figure 5 As shown, the conductive bus 11 has a first surface 111, a second surface 112, a third surface 113, a fourth surface 114, a fifth surface 115 and a sixth surface (not shown in the figure), and the outer shell 12 is coated on the first surface 111, the second surface 112 and the third surface 113 of the conductive bus 11. In this embodiment, the first surface 111 and the second surface 112 are parallel to each other.
[0041] It is worth noting that the outer shell 12 in the insert structure 100 only covers the first surface 111, the second surface 112 and the third surface 113 of the conductive row body 11 (that is, the outer shell 12 directly above the fourth surface 114 of the conductive row body 11 is eliminated), and the first surface 111 and the second surface 112 are parallel to each other. This structure enables the outer shell 12 on the first surface 111 and the outer shell 12 on the second surface 112 of the insert structure 100 to release stress through free deformation of the plastic when the temperature changes.
[0042] In this embodiment, the conductive row 11 includes a copper row. It is understandable that copper is an excellent conductive material with a low resistivity, which can effectively conduct current and reduce energy loss and heat generation. At the same time, it has good processability, is easy to cut, form and weld, can meet the design requirements of different shapes and sizes, can maintain stable conductivity during long-term use, and reduce circuit failures caused by corrosion. Depending on the specific implementation environment, the conductive row 11 can also use a silver row, an aluminum row or other composite row. This embodiment does not constitute a limitation on the specific material of the conductive row 11, but is only an example of its material.
[0043] In this embodiment, the outer shell 12 is made of plastic material.
[0044] In summary, the insert structure 100 effectively solves the cracking problem of insert injection molding from two aspects: increasing the strength of the outer shell 12 and guiding stress release. The structure has strong processability, is easy to implement, reduces material usage, and saves costs. The structure can also be extended to other insert injection molding structures to solve such cracking problems.
[0045] This embodiment also provides an inverter, including the above-mentioned insert structure 100, having all the beneficial effects thereof.
[0046] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.
[0047] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more specific details or by other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.
[0048] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described herein and shown may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.
[0049] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.
[0050] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.
[0051] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.
[0052] The above description of the illustrated embodiments of the present invention (including the contents in the abstract of the specification) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and understood by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments of the present invention, and these modifications will be within the spirit and scope of the present invention.
[0053] Systems and methods have been generally described herein as details that are helpful for understanding the present invention. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present invention. However, those skilled in the relevant art will recognize that the embodiments of the present invention can be practiced without one or more specific details, or practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of the embodiments of the present invention.
Claims
1. An insert structure, characterized in that: include: A conductive row body, wherein the conductive row body is provided with a filling hole; An outer shell, the outer shell is coated on the conductive bar, and a portion of the outer shell fills the filling hole; Wherein, the thermal expansion coefficient of the conductive row body is different from the thermal expansion coefficient of the outer shell body.
2. The insert structure according to claim 1, characterized in that: The diameter of the filling hole is D, and the thickness of the conductive row body along the axis direction where the filling hole is located is d, wherein D≥d.
3. The insert structure according to claim 1 or 2, characterized in that: The number of the filling holes is two.
4. The insert structure according to claim 3, characterized in that: The two filling holes are arranged in mirror symmetry along the central axis of the conductive row body in the length direction, so as to separate the conductive row body into a first row body part, a second row body part and a third row body part, wherein the shape of the first row body part is the same as the shape of the third row body part.
5. The insert structure according to claim 4, characterized in that: The two filling holes are arranged side by side on the central axis of the conductive row body in the width direction, so as to separate the conductive row body into a fourth row body portion and a fifth row body portion, wherein the fourth row body portion and the fifth row body portion have the same shape.
6. The insert structure according to claim 1, characterized in that: The conductive row body has a first surface, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface. The outer shell is coated on the first surface, the second surface and the third surface of the conductive row body.
7. The insert structure according to claim 6, characterized in that: The first surface and the second surface are parallel to each other.
8. The insert structure according to claim 1, characterized in that: The conductive busbar comprises a copper busbar.
9. The insert structure according to claim 1, characterized in that: The outer shell is made of plastic material.
10. An inverter, characterized in that: The invention comprises an insert structure as described in any one of claims 1 to 9.