Multifunctional junction box cover plate and junction box
The multi-functional interface box cover made of magnesium alloy, with structural reinforcements and ventilation, addresses weight and cost issues, enhancing NVH performance and thermal management in electric vehicle components.
Patent Information
- Application Number
- CN202421663003.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-15
AI Technical Summary
Existing junction box cover plates have a single weight or function, and existing improvements increase product weight or production costs.
The cover body is made of magnesium alloy stamping, and the breathable valve is fixed through the connecting parts, combining the reinforcement part and the concave and concave structure to form a multi-functional junction box cover.
Effectively reduce the weight of the cover plate, improve NVH performance, reduce vibration and noise propagation, reduce mold cost, enhance corrosion resistance and installation accuracy.
Smart Images
Figure CN223109611U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive junction boxes, and particularly to a multifunctional junction box cover plate and a junction box. Background Art
[0002] With the rapid development of the new energy vehicle market, the NVH of motors has gradually become one of the important indicators for evaluating their performance. At the same time, how to reduce the weight of electric drive products to improve the overall efficiency of the vehicle is also a key point that needs attention. In new energy vehicles, as an important component connecting the motor, the structural design of the motor junction box cover plate has an important impact on the NVH performance of the motor, and the material selection has also become an important part of improving its performance. Generally, the stamping type junction box cover plate has a flat structure, a relatively low mode, and generally has resonance problems. Also, due to its simple structure, its functions are generally relatively single, and it only serves as a sealing part. The die-casting type junction box cover plate is often heavy and has a high mold cost. Therefore, how to design a cover plate that can improve the NVH performance of the motor, reduce the product weight, lower the production cost, and play more functions has become an urgent problem to be solved.
[0003] Currently, the mainstream way to improve the NVH of the junction box cover plate is by increasing the radiation ribs, but this method can only be achieved through the casting method, which greatly increases the product weight and production cost. Another type of steel plate formed by stamping to reduce the production cost generally has problems such as a simple structural shape, single function, poor mode, heavy weight, and easy surface corrosion. Summary of the Utility Model
[0004] Based on this, a multifunctional junction box cover plate and a junction box are provided to solve the problems of heavy weight or single function of the junction box cover plate in the prior art.
[0005] On the one hand, the utility model provides a multifunctional junction box cover plate, including:
[0006] A cover plate body, which is made of magnesium alloy by stamping;
[0007] A connecting piece, which passes through the cover plate body and is fixed on the cover plate body by an interference fit;
[0008] A breather valve, which is used for heat exchange between the inside and outside of the cover plate body, and the breather valve is fixed on the cover plate body through the connecting piece.
[0009] Based on the above technical solutions, the utility model can also be improved as follows.
[0010] In one implementation, the cover plate body is provided with a plurality of concave-convex structures.
[0011] In one implementation, the cover plate body includes:
[0012] Reinforcing parts, the reinforcing parts are concave or convex, and there are multiple reinforcing parts.
[0013] In one implementation, the reinforcing parts are hexagonal and concave, and the reinforcing parts are arranged evenly.
[0014] In one implementation, the connecting piece is fixed in the middle of the reinforcing part.
[0015] In one implementation, the cover body further includes:
[0016] Connecting holes, which are used to fix the cover body on the motor end cover.
[0017] In one implementation, the cover body further includes:
[0018] Border part, the border part surrounds the circumference of the cover body, the border part is a flat structure, and the connecting holes are all opened on the border part.
[0019] In one implementation, the cover body further includes:
[0020] Wire groove, the wire groove is convex on the cover body, and a receiving part for fixing the wire bundle is formed between the wire groove and the motor end cover.
[0021] In one implementation, connecting holes are provided on each side of the circumference of the cover body.
[0022] On the other hand, the present utility model also provides a junction box, which includes a multi-functional junction box cover plate, and further includes:
[0023] Motor end cover, the motor end cover is located below the junction box cover plate.
[0024] The beneficial effects of the present utility model are as follows: The cover body is made of magnesium alloy by stamping, effectively reducing the weight of the cover body. At the same time, by using the characteristics of magnesium alloy with low density, high strength and good corrosion resistance, the density of the cover body is effectively reduced, the strength of the cover body is improved, and the corrosion resistance of the cover body is enhanced; Since the cover body is a plate part and a stamping part, the processing accuracy of the cover body is not high. By fixing the connecting piece on the cover body and installing the breather valve with the connecting piece, the installation accuracy of the installation position of the breather valve is improved; By fixing the connecting piece in an interference fit manner, while ensuring the sealing performance of the installation position between the connecting piece and the cover body, a stable installation effect is achieved. Using magnesium alloy material to make the cover body can reduce the weight of the whole vehicle while improving the NVH performance; The magnesium alloy of the present application can be 2 mm thick by stamping, effectively reducing the die cost and product weight; The magnesium alloy has excellent damping performance, which can effectively reduce the transmission of vibration and noise. Description of the Drawings
[0025] Figure 1 It is a schematic structural diagram of the multifunctional junction box cover plate from a three-dimensional perspective in an embodiment;
[0026] Figure 2 It is a schematic structural diagram of the multifunctional junction box cover plate from a planar perspective in the second embodiment;
[0027] Figure 3 It is Figure 2 a cross-sectional view taken along line A-A in;
[0028] Figure 4 It is a schematic structural diagram of the multifunctional junction box cover plate from a planar perspective in the third embodiment;
[0029] Figure 5 It is Figure 4 a cross-sectional view taken along line B-B in.
[0030] In the drawings, the components represented by each reference numeral are as follows:
[0031] 10. Cover plate body; 11. Reinforcing part; 12. Connecting hole; 13. Frame part; 14. Wire groove;
[0032] 20. Connector; 30. Vent valve;
[0033] 40. Motor end cover; 50. Accommodating part. Specific embodiments
[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0035] Embodiment 1:
[0036] A multifunctional junction box cover plate, referring to Figure 1 , Figure 2 and Figure 3 , includes a cover plate body 10, a connector 20 and a vent valve 30. The cover plate body 10 is made by stamping magnesium alloy. The connector 20 passes through the cover plate body 10 and is fixed on the cover plate body 10 by an interference fit. The vent valve 30 is used for heat exchange inside and outside the cover plate body 10, and the vent valve 30 is fixed on the cover plate body 10 through the connector 20.
[0037] The beneficial effects of this embodiment are as follows: The cover body 10 is made of magnesium alloy by stamping, effectively reducing the weight of the cover body 10. Meanwhile, by taking advantage of the characteristics of magnesium alloy, such as low density, high strength, and good corrosion resistance, the density of the cover body 10 is effectively reduced, the strength of the cover body 10 is increased, and the corrosion resistance of the cover body 10 is enhanced. Since the cover body 10 is a plate part and a stamping part, the processing accuracy of the cover body 10 is not high. By fixing the connecting piece 20 on the cover body 10 and installing the air vent valve 30 with the connecting piece 20, the installation accuracy of the installation position of the air vent valve 30 is improved. The connecting piece 20 is fixed in an interference fit manner, ensuring the sealing performance of the installation position between the connecting piece 20 and the cover body 10 and achieving a stable installation effect.
[0038] Based on the above embodiment, the cover body 10 is made of magnesium alloy material, reducing the weight of the whole vehicle while improving the NVH performance. The magnesium alloy of this application is formed by stamping, and the thickness can be 2 mm, effectively reducing the mold cost and the product weight. The magnesium alloy has excellent damping performance and can effectively reduce the transmission of vibration and noise.
[0039] In the embodiment, the connecting piece 20 is a steel part; the cross-section of the connecting piece 20 is a continuous bending structure of two Z-shapes arranged symmetrically. The middle part of the connecting piece 20 is arranged vertically. Among the two ends of the middle part of the connecting piece 20, one end extends horizontally towards the cover body 10 and fits with the cover body 10, and the other end extends towards the air vent valve 30 and extends horizontally.
[0040] In some embodiments, referring to Figure 2 and Figure 3 , there are multiple concave-convex structures on the cover body 10. In this way, by setting multiple concave-convex structures on the cover body 10, the effect of a reinforcing rib is achieved, effectively improving the structural strength of the extended plane of the cover body 10.
[0041] In some embodiments, referring to Figure 2 and Figure 3 , the cover body 10 includes a reinforcing part 11. The reinforcing part 11 is concave or convex, and there are multiple reinforcing parts 11. In this way, by setting the reinforcing part 11, the structural strength of the cover body 10 is strengthened; in specific applications, the reinforcing part 11 can be concave or convex, or a combination of concave and convex can be adopted, all of which can achieve the strengthening effect.
[0042] In some embodiments, referring to Figure 2 and Figure 3, the reinforcing part 11 is hexagonal and concave, and the reinforcing parts 11 are arranged evenly. In this way, a hexagonal reinforcing structure is provided. The hexagonal structure itself has good bidirectional tensile stability. This structural form enables the reinforcing ribs to evenly disperse the force when subjected to tensile force, thereby improving the overall tensile strength; the hexagonal reinforcing ribs can effectively increase the load-bearing capacity and stability of the product, enabling it to withstand greater external forces without deformation or damage. In addition, the corner design of the hexagon can disperse stress, reduce damage caused by stress concentration, facilitate improving the fatigue life and reliability of the cover body 10, effectively improve the mode of the cover body 10, and enhance the NVH of the cover body 10.
[0043] In some embodiments, referring to Figure 2 and Figure 3 , the connecting piece 20 is fixed in the middle of the reinforcing part 11. In this way, since the middle of the reinforcing part 11 is a plane, the connecting piece 20 is connected to the middle of the reinforcing part 11, so that the connecting piece 20 is fixed at a flat position of the cover body 10, which is conducive to improving the sealing effect of the connection part.
[0044] In some embodiments, referring to Figure 2 and Figure 3 , the cover body 10 further includes a connection hole 12, and the connection hole 12 is used to fix the cover body 10 on the motor end cover 40. In this way, by providing the connection hole 12, it is convenient to fix the position of the cover body 10 on the motor end cover 40.
[0045] In some embodiments, referring to Figure 2 and Figure 3 , the cover body 10 further includes a frame part 13, the frame part 13 surrounds the cover body 10 in the circumferential direction, the frame part 13 is a flat structure, and the connection holes 12 are all opened on the frame part 13. In this way, a surrounding frame part 13 is provided in the circumferential direction of the cover body 10. By opening the connection holes 12 on the frame part 13, it is convenient to fix the cover body 10 on the motor end cover 40 along the circumferential direction of the cover body 10, thereby improving the connection stability between the cover body 10 and the motor end cover 40.
[0046] In some embodiments, referring to Figure 4 and Figure 5 , the cover body 10 further includes a wire groove 14, the wire groove 14 is convex on the cover body 10, and a receiving part 50 for fixing the wire bundle is formed between the wire groove 14 and the motor end cover 40. In this way, by providing the wire groove 14, it can be used to accommodate the sub-wire harness of the receiving part 50. Since the structure of the motor end cover 40 is provided beside the wire groove 14, the motor end cover 40 and the wire groove 14 together form a limit for the wire harness in the vertical direction, thereby preventing the wire harness from spreading; reducing the use of fixing bolts, effectively reducing the machining content of the product, and reducing the production cost.
[0047] In the embodiment, refer to Figure 4 and Figure 5 , the wire groove 14 is in a long strip shape to facilitate the regular placement of the wire harness.
[0048] In some embodiments, refer to Figure 1 and Figure 2 , connection holes 12 are provided on each side of the cover plate body 10 in the circumferential direction. In this way, the connection holes 12 are evenly distributed, facilitating the uniform connection of the circumferential direction of the cover plate body 10 to the motor end cover 40. While increasing the connection positions, it has an effect of uniformly fixing the circumferential direction of the cover plate body 10.
[0049] During use, the strengthening part 11 forms a hexagonal local structure at the edge of the cover plate body 10, extending to the frame part 13 close to the cover plate body 10. The strengthening part 11 close to the frame part 13 is an incomplete hexagon, which can be a local structure of a hexagon; the circumferential direction of the cover plate body 10 is in a polygonal structure, with four sides being straight and one side being arc-shaped.
[0050] In the embodiment, the frame part 13 is provided with outwardly convex connecting ears at the positions of the connection holes 12. The connecting ears are in an arc-shaped outwardly convex structure and are in the same plane as the frame part 13. The connecting ears are added to avoid the problem that the connection holes 12 are prone to cracking due to the too small circumferential dimension of the connection holes 12.
[0051] When the present application is used, by setting the air vent valve 30, the free circulation of gas inside and outside the motor is improved, the heat exchange capacity is increased, and the problems of overheating of the motor and too high internal pressure are effectively prevented. And the motor junction box cover plate is often close to the high-temperature area of the motor. Because the air vent valve 30 increases the heat exchange capacity, the problem of anti-condensation of the motor is also indirectly improved.
[0052] Currently, most of the junction box cover plates formed by stamping are often relatively single in function, only serving as a sealing cover plate without other functions, and their shapes are mostly flat, and the modal is generally poor. By adopting the present application, the cover plate body 10 serves as a cover plate, and at the same time integrates the air vent valve 30 to facilitate the heat exchange inside and outside the motor; the cover plate body 10 is also provided with a strengthening part 11 to play a role in strengthening the structural strength; in addition, the wire groove 14 on the cover plate body 10 cooperates with the motor end cover 40 to form a receiving part 50, which has an effect of clamping the wire harness without using limiting structures such as bolts.
[0053] Embodiment Two:
[0054] A junction box includes a multi-functional junction box cover plate and also includes a motor end cover 40, and the motor end cover 40 is located below the junction box cover plate.
[0055] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The form, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the layout form of its components may also be more complex.
[0056] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model.
[0057] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0058] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0059] In the present utility model, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0060] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.
[0061] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0062] The above-described embodiments merely represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
Claims
1. A multifunctional junction box cover plate, characterized in that, Including: A cover plate body (10), the cover plate body (10) is made by stamping magnesium alloy; A connecting piece (20), the connecting piece (20) passes through the cover plate body (10) and is fixed on the cover plate body (10) by an interference fit; A breather valve (30), used for heat exchange inside and outside the cover plate body (10), the breather valve (30) is fixed on the cover plate body (10) by the connecting piece (20).
2. The multifunctional junction box cover plate according to claim 1, characterized in that, The cover plate body (10) is provided with a plurality of concave-convex structures.
3. The multifunctional junction box cover plate according to claim 1, wherein The cover plate body (10) includes: Reinforcing parts (11), the reinforcing parts (11) are concave or convex, and there are a plurality of the reinforcing parts (11).
4. The multifunctional junction box cover plate according to claim 3, characterized in that, The reinforcing parts (11) are hexagonal and concave, and the reinforcing parts (11) are arranged evenly.
5. The multifunctional junction box cover plate according to claim 3, characterized in that, The connecting piece (20) is fixed in the middle of the reinforcing part (11).
6. The multifunctional junction box cover plate according to claim 1, characterized in that The cover plate body (10) further includes: Connecting holes (12), the connecting holes (12) are used to fix the cover plate body (10) on the motor end cover (40).
7. The multifunctional junction box cover plate according to claim 6, characterized in that, The cover plate body (10) further includes: A border part (13), the border part (13) surrounds the circumference of the cover plate body (10), the border part (13) is a flat structure, and the connecting holes (12) are all opened on the border part (13).
8. The multifunctional junction box cover plate according to claim 6, wherein, The cover plate body (10) further includes: A wire groove (14), the wire groove (14) is convex on the cover plate body (10), and a receiving part (50) for fixing wire bundles is formed between the wire groove (14) and the motor end cover (40).
9. The multifunctional junction box cover plate according to claim 6, wherein, The connecting holes (12) are provided on each side of the circumference of the cover plate body (10).
10. A junction box, characterized in that, Including the multifunctional junction box cover plate according to any one of claims 1-9, further including: A motor end cover (40), the motor end cover (40) is located below the junction box cover plate.