Electrical box
By employing a first and second plug-in joint in the electrical box, the problem of stable fastener connection is solved, enhancing the safety and structural strength of the electrical box and reducing the risk of the box cover flying off.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNGROW POWER SUPPLY CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-06-05
AI Technical Summary
The diverse surface structures of existing electrical boxes cannot meet the requirements for stable fastener connections, making it easy for the box cover to fly off in the event of an explosion, thus affecting safety.
The insertion and engagement of the first and second insertion parts provide a stable force-bearing surface, ensuring that the force exerted by the fastener is perpendicular to this force-bearing surface, thereby increasing connection stability. Furthermore, the use of seals and multi-folded edge structures enhances safety.
It improves the connection stability of fasteners, reduces the possibility of the box cover flying off in the event of an explosion, and enhances the safety and structural strength of the electrical box.
Smart Images
Figure CN224329124U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of electrical equipment technology, and specifically relates to an electrical box. Background Technology
[0002] In industrial applications, electrical boxes typically consist of a housing and a cover. The housing houses various electrical components, while the cover seals the housing and protects the internal components. The housing and cover are secured together with fasteners. During operation, components may generate high temperatures, sparks, or arcs, especially in malfunctions, potentially leading to internal explosions and the cover being blown off. Therefore, the stability of the fastener connections is a crucial factor in the safety of electrical boxes. However, the diverse surface structures of existing electrical boxes often fail to meet the requirements for stable fastener connections. Utility Model Content
[0003] This application provides an electrical box that aims to solve the technical problem that the diverse surface structures of electrical boxes cannot meet the requirements for stable fastener connections.
[0004] Technical solution: The electrical box described in the embodiments of this application includes:
[0005] The housing assembly includes a main body, a first folded edge, and a first insertion part. The main body has a receiving cavity and an opening communicating with the receiving cavity. The first folded edge is disposed around the opening and connected to the main body. The first insertion part is disposed on the first folded edge.
[0006] A cover plate assembly includes a cover plate body and a second insertion part. The cover plate body covers the opening, and at least part of the side of the cover plate body away from the main body is curved. The second insertion part is disposed on the curved surface of the cover plate body, and the second insertion part and the first insertion part are inserted into each other.
[0007] Fasteners are used to connect the first insertion part and the second insertion part, respectively.
[0008] In some embodiments, at least a portion of the first folded edge extends in a direction away from the main body, the first insertion portion is provided with a first groove on the side facing the cover plate body, and the second insertion portion is inserted into the first groove.
[0009] In some embodiments, the first insertion portion has a notch communicating with the first groove, and the notch is located on the side of the first folded edge away from the main body portion.
[0010] In some embodiments, the first folded edge is disposed on the outer side of the main body portion;
[0011] Alternatively, the first folded edge may be disposed within the receiving cavity.
[0012] In some embodiments, the second plug portion has a second groove on the side opposite to the first plug portion.
[0013] In some embodiments, the second insertion portion protrudes from the curved surface of the cover plate body toward the first folded edge, and the second insertion portion forms the second groove.
[0014] In some embodiments, the side of the cover plate body opposite to the main body is curved;
[0015] Alternatively, the cover plate body may have a flat side facing away from the main body and a curved side, with the curved side of the cover plate body surrounding the flat side.
[0016] In some embodiments, the first folded edge is disposed on the outer side of the main body portion;
[0017] The cover plate assembly further includes a second folded edge, which is arranged around the first folded edge and connected to the cover plate body.
[0018] In some embodiments, the cover assembly further includes a third folded edge connected to the second folded edge and extending toward the body portion, with a portion of the third folded edge located on the side of the first folded edge away from the cover body.
[0019] In some embodiments, the electrical box further includes a seal disposed around the opening and between the cover body and the first folded edge.
[0020] Beneficial effects: The electrical box in this application embodiment provides a stable force-bearing surface for the fastener through the plug-in cooperation of the first plug-in part and the second plug-in part, so that the force of the fastener is perpendicular to the force-bearing surface, thereby increasing the stability of the connection between the second plug-in part and the first plug-in part. This not only satisfies the need for a stable connection between the cover plate body and the main body when part of the cover plate body is curved, but also reduces the possibility of the cover plate body flying out when an explosion occurs inside the main body, thus helping to improve the safety of the electrical box. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of the electrical box provided in an embodiment of this application;
[0023] Figure 2for Figure 2 A magnified view of a portion of point A in the middle;
[0024] Figure 3 A cross-sectional view of an electrical box provided in an embodiment of this application;
[0025] Figure 4 for Figure 3 A magnified view of a portion of point B in the middle;
[0026] Figure 5 This is a schematic diagram of the third folded edge provided in an embodiment of this application;
[0027] Figure 6 This is another structural schematic diagram of the box cover body provided in an embodiment of this application.
[0028] Reference numerals: 1. Box assembly; 11. Main body; 110. Receiving cavity; 111. Opening; 12. First folded edge; 121. First side; 122. Second side; 13. First insertion part; 131. First groove; 132. Notch; 2. Cover plate assembly; 21. Cover plate body; 22. Second insertion part; 221. Second groove; 23. Second folded edge; 24. Third folded edge; 3. Fastener; 31. Screw; 4. Seal. Detailed Implementation
[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0030] In the description of this application, it should be understood that the terms "height," "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used 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 on this application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.
[0031] It should also be noted that in the accompanying drawings of the embodiments of this application, the arrow marked with X represents the first direction X. The first direction X is introduced to more clearly illustrate the structure and relative positional relationship of each component in the electrical box. In practical applications, the first direction X may change depending on the placement of the electrical box.
[0032] As a prelude to the embodiments of this application, electrical boxes are typically used to house and protect various electrical components. These components may generate high temperatures, sparks, or arcs during operation, especially in the event of a malfunction, potentially leading to an internal explosion. Current electrical boxes mainly consist of a box body and a cover. Electrical components are housed within the box body, and the box body and cover are connected by screws. When an explosion occurs inside the box, the cover can easily fly off entirely, posing a safety hazard to surrounding personnel and thus affecting the safety of the electrical box. The surface structures of existing electrical boxes tend to be diverse. For example, the surface of the cover may be curved. If it is directly locked and fixed with screws, the screw axis may not coincide with the axis of the threaded hole, generating lateral force during tightening, which may cause thread stripping or even screw root breakage. Furthermore, when the screw head contacts the curved surface, it is a point contact or line contact, causing the preload to concentrate in a small area, potentially crushing the cover material, leading to localized dents or warping of the cover, affecting sealing performance and structural strength.
[0033] Please combine them together Figure 1 , Figure 2 and Figure 3 The electrical box in this embodiment includes a box assembly 1, a cover assembly 2, and fasteners 3. The box assembly 1 includes a main body 11, a first folded edge 12, and a first plug-in portion 13. The main body 11 has a first direction X and a second direction. The first direction X corresponds to the height direction of the main body 11. The second direction intersects with the first direction X, and the included angle between the two is 85° to 95°, preferably 90°. The main body 11 has a receiving cavity 110 for installing electrical components and an opening 111 communicating with the receiving cavity 110. The first folded edge 12 is disposed around the opening 111 and connected to the main body 11. The first plug-in portion 13 is disposed on the first folded edge 12.
[0034] The cover plate assembly 2 includes a cover plate body 21, which covers the opening 111. At least part of the side of the cover plate body 21 facing away from the main body 11 is curved, and a second insertion part 22 is provided on the curved surface of the cover plate body 21. The second insertion part 22 and the first insertion part 13 are interlocked. It can be understood that the interlocking can be that the first insertion part 13 is inserted into the second insertion part 22, that is, the second insertion part 22 is a support, or the second insertion part 22 is inserted into the first insertion part 13, with the first insertion part 13 serving as a support.
[0035] Fastener 3 connects the first insertion part 13 and the second insertion part 22 respectively. Fastener 3 can be screw, bolt, pin, rivet, etc.
[0036] In this embodiment, the first insertion part 13 and the first folded edge 12 are integrally formed. The first insertion part 13 can be formed on the first folded edge 12 by stamping process to form a part protruding along the first direction X. Similarly, the second insertion part 22 and the second folded edge 23 are also integrally formed, and their forming process is the same as that of the first insertion part 13.
[0037] The first connector 13 and the second connector 22 are connected by screws 31. Both the first connector 13 and the second connector 22 are provided with connecting holes, and at least the connecting hole corresponding to the first connector 13 has internal threads. The screws 31 are threadedly connected to the first connector 13 through the connecting holes, thereby locking the first connector 13 and the second connector 22. In some other embodiments, the first connector 13 and the second connector 22 may also be independent components and fixed by welding.
[0038] The first folded edge 12 is connected to the main body 11 to form an integral structure, which enhances the overall strength of the box assembly 1, can better withstand the impact force generated by the internal explosion, and reduces the deformation or cracking of the main body 11.
[0039] The insertion and engagement of the first insertion part 13 and the second insertion part 22 can form a stable contact plane between them on the one hand, and provide a stable force plane for the connection of the fastener 3 on the other hand. Moreover, the force plane is independent of the curved part of the cover plate body 21, so that the axis of the fastener 3 and the force are perpendicular to the force plane, and the screw can also form a surface contact, thereby increasing the stability of the connection between the second insertion part 22 and the first insertion part 13, and satisfying the stable connection between the cover plate body 21 and the main body 11 when part of the cover plate body 21 is curved.
[0040] In addition, the insertion and engagement of the first insertion part 13 and the second insertion part 22 also serve to position and limit the relative displacement of the cover plate body 21 and the main body part 11 in the second direction.
[0041] Please combine them together Figure 1 and Figure 2 In some embodiments, the first insertion portion 13 has a first groove 131 on the side facing the cover plate body 21. The first groove 131 extends along the first direction X, and the second insertion portion 22 is inserted into the first groove 131. The first insertion portion 13 protrudes in the direction away from the cover plate body 21 and forms the first groove 131 inside, making full use of the space on the side of the first folded edge 12 facing away from the cover plate body 21. This allows the surface of the first folded edge 12 on the side of the opening 111 to remain uniform and smooth, so that the cover plate body 21 can fit together.
[0042] Please combine them together Figure 1 and Figure 2In some embodiments, the first insertion portion 13 is provided with a notch 132 communicating with the first groove 131, and the notch 132 is located on the side of the first folded edge 12 away from the main body portion 11. Specifically, the first folded edge 12 includes a first side 121 and a second side 122 that are connected to each other. The first side 121 is connected to the main body portion 11 and extends along a second direction, and the second side 122 extends along a first direction X. The first side 121 and the second side 122 form an L-shaped structure. The first insertion portion 13 connects the first side 121 and the second side 122 respectively, and the notch 132 is formed on the second side 122. In this embodiment, the inner wall surface of the first plug-in portion 13 is arc-shaped. Compared with the complete first plug-in portion 13, that is, the inner wall surface of the first plug-in portion 13 is a complete circumferential surface, when the inner diameter of the first plug-in portion 13 remains unchanged and the distance between the first plug-in portion 13 and the main body portion 11 remains unchanged, the width of the first side 121 needs to be increased. The existence of the notch 132 can reduce the required width of the first side 121 and reduce the single-side allowance of the first side 121. At the same time, when the width of the first side 121 remains unchanged, the size of the first plug-in portion 13 can be maximized to fully contact the second plug-in portion 22, which helps to save resources and occupy space.
[0043] In some other embodiments, the inner contour of the first insertion part 13 may also be a polygon, and the outer contour of the second insertion part 22 may be adapted to the first insertion part 13 so that the two can fit together after insertion.
[0044] Please refer to Figure 1 In some embodiments, the first folded edge 12 is disposed on the outer side of the main body 11. The first folded edge 12 increases the rigidity of the edge of the main body 11, and since the first folded edge 12 is located on the outer side of the main body 11, it has an open operable space, which facilitates the installation and removal of the cover plate assembly 2.
[0045] In some embodiments, the first folded edge 12 is disposed within the receiving cavity 110. The first folded edge 12 located inside the main body 11 can reduce the external dimensions of the electrical box, making its structure compact and suitable for installation environments with limited space, thus helping to meet the design and installation requirements under different working conditions.
[0046] Please combine them together Figure 3 and Figure 4 In some embodiments, the second insertion portion 22 has a second groove 221 on the side opposite to the first insertion portion 13. The second groove 221 extends along the first direction X, and at least a portion of the fastener 3 is disposed in the second groove 221. The surface of the second groove 221 opposite to its opening in the first direction X is a plane, and this plane is perpendicular to the first direction X, so as to allow the fastener 3 to be stably abutted.
[0047] The second groove 221 accommodates a portion of the fastener 3, preventing it from protruding from the surface of the cover plate body 21. When the first insertion part 13 and the second insertion part 22 are inserted into each other, their corresponding connection holes overlap, serving a positioning function and facilitating the subsequent installation of the fastener 3.
[0048] Please combine them together Figure 1 and Figure 4 In some embodiments, the second insertion portion 22 protrudes from the curved surface of the cover plate body 21 toward the first folded edge 12, and the second insertion portion 22 is recessed to form a second groove 221. The second insertion portion 22 and the first insertion portion 13 both extend toward the same side, so that the surface of the cover plate body 21 remains smooth and uniform, thereby saving space.
[0049] Please refer to Figure 1 In some embodiments, the side of the cover plate body 21 away from the main body 11 is curved, and the curved structure can increase the bending stiffness and compressive stability of the cover plate body 21.
[0050] Please refer to Figure 6 Alternatively, the cover body 21 may have a flat side facing away from the main body 11 and a curved side, with the curved side surrounding the flat side. In this case, the side of the cover body 21 facing away from the main body 11 is divided into two sections. The middle section is flat and can provide a stable and reliable contact surface for installing other external structures. The outer section is curved and can be formed by stamping to form the second insertion part 22. The slot of the second groove 221 is formed on the curved surface. In this case, the surface of the cover body 21 combines the advantages of both flat and curved surfaces, which is conducive to the diversified design of the electrical box surface structure.
[0051] Please refer to Figure 4 In some embodiments, the fastener 3 further includes a washer and a flat washer. The inner bottom surface of the second insertion portion 22 is perpendicular to the first direction X. Both the washer and the flat washer are disposed within the second groove 221, and the flat washer abuts against the inner bottom surface of the second insertion portion 22. The screw 31 passes through the washer, the flat washer, the second insertion portion 22, and the first insertion portion 13 in sequence, and is threadedly connected to the second insertion portion 22 and the first insertion portion 13. The washer and the flat washer further increase the stability of the screw 31 connection to prevent the screw 31 from becoming misaligned and affecting its tightening force.
[0052] Please combine them together Figure 4 and Figure 5In some embodiments, the first folded edge 12 is disposed on the outer side of the main body 11. The cover assembly 2 also includes a second folded edge 23, which surrounds the first folded edge 12 and is connected to the cover body 21. The second folded edge 23 extends along a first direction X and is distributed opposite to the first folded edge 12 in a second direction. The second folded edge 23 blocks the gap between the cover body 21 and the main body 11, thereby reducing the direct entry of impurities from the external environment into the main body 11 and improving the safety of the electrical box.
[0053] Please combine them together Figure 4 and Figure 5 In some embodiments, the cover assembly 2 further includes a third folded edge 24, which is connected to the second folded edge 23 and extends toward the main body 11. A portion of the third folded edge 24 is located on the side of the first folded edge 12 away from the cover body 21; that is, the orthographic projections of the third folded edge 24 and the first folded edge 12 along the first direction X on the same projection plane at least partially overlap. The third folded edge 24 and the second folded edge 23 form an L-shaped structure, which can be integrally formed using stamping or bending processes. When the cover body 21 is blown open due to an explosion, the third folded edge 24 can hook onto the first folded edge 12 to hold the cover body 21 in place, reducing the possibility of the cover assembly 2 flying out. When an electrical box is installed, the end of the electrical box corresponding to the third folded edge 24 can be placed upwards, so that when the fastener 3 is removed, the cover body 21 can still be hung on the main body 11 via the third folded edge 24 and the second folded edge 23, facilitating personnel operation.
[0054] Please combine them together Figure 1 and Figure 2 In some embodiments, the electrical box further includes a seal 4, which surrounds the opening 111 and is disposed between the cover body 21 and the first flange 12. The seal 4 has an annular structure and is located between the opening 111 and the first insertion portion 13. The seal 4 is clamped by the cover body 21 and the first flange 12 to achieve a mutual seal. The structure is simple and easy to maintain. The seal 4 can be made of silicone rubber or EPDM rubber, which has excellent weather resistance and sealing performance.
[0055] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0056] The electrical box provided in the embodiments of this application has been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these 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. An electrical box, characterized in that, include: The housing assembly (1) includes a main body (11), a first folded edge (12) and a first insertion part (13). The main body (11) has a receiving cavity (110) and an opening (111) communicating with the receiving cavity (110). The first folded edge (12) is disposed around the opening (111) and connected to the main body (11). The first insertion part (13) is disposed on the first folded edge (12). The cover plate assembly (2) includes a cover plate body (21) and a second insertion part (22). The cover plate body (21) covers the opening (111). At least part of the side of the cover plate body (21) away from the main body (11) is curved. The second insertion part (22) is disposed on the curved surface of the cover plate body (21). The second insertion part (22) and the first insertion part (13) are inserted into each other. Fastener (3) connects the first plug-in part (13) and the second plug-in part (22) respectively.
2. The electrical box according to claim 1, characterized in that, At least a portion of the first folded edge (12) extends in a direction away from the main body (11), and the first insertion part (13) is provided with a first groove (131) on the side facing the cover plate body (21), and the second insertion part (22) is inserted into the first groove (131).
3. The electrical box according to claim 2, characterized in that, The first insertion part (13) is provided with a notch (132) that communicates with the first groove (131), and the notch (132) is located on the side of the first folded edge (12) away from the main body part (11).
4. The electrical box according to any one of claims 1 to 3, characterized in that, The first folded edge (12) is disposed on the outer side of the main body (11); Alternatively, the first folded edge (12) may be disposed within the receiving cavity (110).
5. The electrical box according to claim 1, characterized in that, The second plug-in portion (22) has a second groove (221) on the side opposite to the first plug-in portion (13).
6. The electrical box according to claim 5, characterized in that, The second insertion part (22) protrudes from the curved surface of the cover plate body (21) toward the first folded edge (12), and the second groove (221) is formed in the second insertion part (22).
7. The electrical box according to claim 1, characterized in that, The side of the cover plate body (21) facing away from the main body (11) is curved; Alternatively, the cover plate body (21) may have a flat side facing away from the main body (11) and a curved side, with the curved side of the cover plate body (21) surrounding the flat side.
8. The electrical box according to claim 1, characterized in that, The first folded edge (12) is disposed on the outer side of the main body (11); The cover plate assembly (2) further includes a second fold (23), which surrounds the first fold (12) and is connected to the cover plate body (21).
9. The electrical box according to claim 8, characterized in that, The cover plate assembly (2) further includes a third fold (24) which is connected to the second fold (23) and extends toward the main body (11). A portion of the third fold (24) is located on the side of the first fold (12) away from the cover plate body (21).
10. The electrical box according to claim 1, characterized in that, The electrical box also includes a seal (4) which is disposed around the opening (111) and between the cover body (21) and the first fold (12).