A metal junction box

Abstract

The application discloses a metal junction box, comprising a shell and a junction terminal, the shell has a junction end and a mounting end, the mounting end can be connected with a panel, and a first fool-proof part is arranged at the mounting end to prevent the mounting end from being connected with the panel by mistake, the junction terminal is mounted in the shell, and an opening of the junction terminal faces the junction end, a fool-proof position is arranged on the junction terminal, and a second fool-proof part is arranged in the shell to prevent the fool-proof position from being connected by mistake. The fool-proof structure is arranged, the reverse connection or mispositioning is prevented by physical interference, and a solid and reliable safety barrier is constructed for a core high-voltage system.

Description

Technical Field

[0001] This application relates to the technical field of connectors, and more particularly to a metal junction box. Background Technology

[0002] In the high-voltage power system of new energy vehicles, the high-voltage junction box is a crucial high-voltage power distribution unit. As the core node for the distribution and management of high-voltage power in the entire vehicle, it must meet the stringent requirements of the system for safety, reliability, and durability. At the same time, the high-voltage junction box is also the safety protection center of the high-voltage system. When serious faults such as overcurrent or short circuit are detected, its internal fuse can quickly blow to cut off the power supply and prevent damage to the lines and related components.

[0003] However, existing high-voltage junction boxes still have structural design deficiencies: their ports generally lack foolproof design markings, or the markings are not easily identifiable. This defect significantly increases the risk of human error during assembly, maintenance, and other operations, making it extremely easy for ports to be mis-plugged. Mis-plugging can not only cause the control unit or fuse to burn out, but in severe cases, it can also lead to safety accidents such as connector explosion and fire, seriously threatening the safe operation of the high-voltage system and the safety of the entire vehicle. Utility Model Content

[0004] The purpose of this application is to provide a metal junction box that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: On one hand, a metal junction box is provided, comprising: a housing and a terminal block, the housing having a terminal block and a mounting end, the mounting end being able to be connected to a panel, and the mounting end having a first anti-mistake part that cooperates with the panel to prevent mistakes, the terminal block being installed inside the housing, and the opening of the terminal block facing the terminal block, the terminal block having an anti-mistake position, and the housing having a second anti-mistake part that cooperates with the anti-mistake position to prevent mistakes.

[0006] Furthermore, the first anti-mistake part is an anti-mistake post protruding from the mounting end.

[0007] Furthermore, the number of the anti-foolproof post is one, and the anti-foolproof post can be combined with a corresponding hole on the panel to achieve the anti-foolproof effect.

[0008] Furthermore, the foolproof notch is a foolproof notch located at the end of the terminal block opposite to the opening, and the second foolproof part is an L-shaped protrusion located inside the housing.

[0009] Furthermore, the foolproof position is a foolproof groove located at the end of the terminal block away from the opening, and the second foolproof part is a U-shaped protrusion located inside the housing.

[0010] Furthermore, it also includes a shielding sleeve and a shielding spring, wherein the shielding sleeve is disposed inside the housing and the shielding spring is disposed on the inner side of the shielding sleeve.

[0011] Furthermore, it also includes a gland, a sealing body, and a gasket. The gland is installed on the terminal block, the sealing body is disposed inside the housing and located on the side of the shielding sleeve away from the terminal block, and the gasket is installed between the sealing body and the gland.

[0012] Furthermore, the housing includes a base and a top cover, the top cover being detachably mounted on the base, and the wiring terminals being disposed within the base.

[0013] Furthermore, a first sealing ring is provided at the connection between the base and the top cover.

[0014] Furthermore, the mounting end is provided with a second sealing ring, which can seal the connection between the mounting end and the panel.

[0015] The beneficial effects of this application are as follows: the first and second error-proof parts form a closed loop of error-proofing from the whole to the part, effectively avoiding misalignment of the housing and panel, and the wiring terminals and housing, reducing the risk of human error from the source; at the same time, the clear error-proofing structure enables each component to be quickly and accurately aligned during assembly and maintenance, improving the convenience of operation and work efficiency; finally, by eliminating misinsertion of ports, it avoids safety accidents such as burnt-out control units and fuses, and connector explosions and fires, effectively ensuring the operational reliability of the high-voltage system and the safety of the whole vehicle, and meeting the stringent requirements of high-voltage power systems for safety and reliability. Attached Figure Description

[0016] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the metal junction box described in an embodiment of this application; Figure 2 This is an exploded view of the metal junction box described in the embodiment of this application; Figure 3 This is a first arrangement diagram of the first error prevention part in an embodiment of this application; Figure 4 This is a second arrangement diagram of the first error prevention part in an embodiment of this application; Figure 5 This is a third arrangement diagram of the first error prevention part in the embodiments of this application; Figure 6 This is a fourth arrangement diagram of the first error prevention part in the embodiments of this application; Figure 7 This is a fifth arrangement diagram of the first error-proof part in the embodiments of this application; Figure 8 This is a sixth arrangement diagram of the first error prevention unit in the embodiments of this application; Figure 9 This is a first arrangement diagram of the second anti-mistake part and the anti-mistake position in an embodiment of this application; Figure 10 This is a second arrangement diagram of the second foolproof part and the foolproof position according to an embodiment of this application; Figure 11 This is a third arrangement diagram of the second foolproof part and the foolproof position in the embodiments of this application; Figure 12 This is a fourth arrangement diagram of the second foolproof part and the foolproof position in the embodiments of this application; Figure 13 This is a fifth arrangement diagram of the second foolproof part and the foolproof position in the embodiments of this application; Figure 14 This is a sixth arrangement diagram of the second foolproof part and foolproof position in the embodiments of this application.

[0018] In the diagram: 1. Housing; 101. Anti-foolproof post; 102. L-shaped protrusion; 103. Base; 104. Top cover; 105. U-shaped protrusion; 2. Wiring terminal; 201. Anti-foolproof notch; 202. Anti-foolproof groove; 3. Shielding sleeve; 4. Shielding spring; 5. Sealing body; 6. Gasket; 7. Gland; 8. First sealing ring; 9. Mounting terminal. Detailed Implementation

[0019] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] like Figures 1-14 As shown, this embodiment provides a metal junction box, including: a housing 1 and a terminal block 2. The housing 1 has a terminal block and a mounting end. The mounting end can be connected to a panel, and the mounting end is provided with a first anti-mistake part that cooperates with the panel to prevent mistakes. The terminal block 2 is installed inside the housing 1, and the opening of the terminal block 2 faces the terminal block. The terminal block 2 is provided with an anti-mistake position. The inside of the housing 1 is provided with a second anti-mistake part that cooperates with the anti-mistake position to prevent mistakes.

[0023] Based on the above solution, the existing mis-insertion problem is solved through the synergistic effect of a dual-anti-misalignment structure. The mounting end of the housing 1 is equipped with a first anti-misalignment part, which has a unique mating relationship with the panel. The first anti-misalignment part can only be fitted and connected to the panel when the housing 1 is aligned with the panel in a preset orientation. If the orientation of the housing 1 is off, the first anti-misalignment part cannot be fitted with the panel, directly preventing misalignment of the housing 1 relative to the panel and avoiding subsequent misalignment of the wiring ports due to housing 1 misalignment. The terminal block 2 needs to be installed inside the housing 1, and the terminal block 2 itself has an anti-misalignment position. A corresponding second anti-misalignment part is provided inside the housing 1. Only when the terminal block 2 is inserted into the housing 1 with its opening facing the wiring end of the housing 1 can the anti-misalignment position of the terminal block 2 be fitted and engaged with the second anti-misalignment part of the housing 1, ensuring that the installation position and opening orientation of the terminal block 2 inside the housing 1 fully meet the design requirements, preventing the terminal block 2 from being installed backwards or misaligned.

[0024] Existing technologies often suffer from mis-insertion risks due to missing or unclear anti-misalignment markings. This metal junction box, however, eliminates the possibility of mis-insertion from the assembly stage through dual structural anti-misalignment. It eliminates the need for operators to identify markings; instead, the physical compatibility of the first and second anti-misalignment components enforces the correct installation of each component, completely avoiding human error caused by marking issues. Specifically, the first anti-misalignment prevents misalignment of the housing 1 and the panel, while the second anti-misalignment prevents incorrect installation of the wiring terminals 2 within the housing 1. This two-layer structure forms a comprehensive anti-misalignment loop. Whether during assembly or subsequent maintenance, operators do not need to rely on experience to determine the installation orientation; they can complete the correct assembly solely through the compatibility of the anti-misalignment structure, significantly reducing the probability of human error. Furthermore, by preventing mis-insertion, it directly avoids problems such as control unit burnout and fuse burnout caused by mis-insertion, and also prevents safety accidents such as connector explosions and fires caused by mis-insertion. This effectively meets the safety and reliability requirements of high-voltage power systems, ensuring the stable operation of the vehicle's high-voltage system.

[0025] Furthermore, the first anti-misfit part is an anti-misfit post 101 protruding from the mounting end. The panel is provided with a mating structure (such as a matching hole or groove) corresponding to the anti-misfit post 101. Only when the housing 1 is aligned with the panel in the preset correct orientation can the anti-misfit post 101 be smoothly inserted into the mating structure of the panel, so that the housing 1 and the panel are connected. If there is a deviation in the installation orientation of the housing 1, the anti-misfit post 101 will physically interfere with the panel and cannot be inserted into the mating structure, directly preventing the incorrect assembly of the housing 1 and the panel, thereby limiting the only correct installation orientation of the housing 1 relative to the panel from the source.

[0026] Furthermore, only one anti-mistake post 101 is provided, and the anti-mistake post 101 can be combined with a corresponding hole on the panel to achieve the anti-mistake effect. The anti-mistake post 101 is in a specific asymmetrical position at the mounting end of the housing 1, and only one hole on the panel is provided that perfectly matches the position and size of the anti-mistake post 101; only when the housing 1 is aligned with the panel in the preset correct orientation can the single anti-mistake post 101 be accurately inserted into the unique corresponding hole on the panel.

[0027] Specifically, such as Figures 9-14 As shown, the placement of the anti-foolproof post 101 should adhere to the core principle of asymmetrical distribution, ensuring that foolproofing is achieved through a unique fit between a single post and the panel hole, while avoiding conflicts with other structures at the mounting end of the housing 1. The specific placement scheme is as follows: First, it is set at a corner of the mounting end of the housing 1, such as the upper left corner or upper right corner of the rectangular mounting end, and does not overlap with the fixing hole of the mounting end.

[0028] Second, it is set at the middle of one side of the mounting end of the housing 1, such as the middle of the left side or the middle of the right side of the rectangular mounting end, and maintains a preset distance from the fixing hole of the mounting end.

[0029] Third, it is set next to a fixing hole at the mounting end of the housing 1, and the distance from the fixing hole is less than the distance from other areas of the mounting end to the fixing hole.

[0030] Fourth, it is set on one side of the central axis of the mounting end of the housing 1, forming a center offset layout, and does not conflict with any functional openings of the mounting end.

[0031] In some embodiments, such as Figures 3-6 As shown, the foolproof notch 201 is located at the end of the terminal 2 facing away from the opening, and the second foolproof part is an L-shaped protrusion 102 located inside the housing 1. The terminal 2 needs to be installed in the housing 1 with its opening facing the terminal of the housing 1 in a preset posture. At this time, the foolproof notch 201 at the end facing away from the opening can complement and fit with the L-shaped protrusion 102 inside the housing 1. The horizontal and vertical structures of the L-shaped protrusion 102 are respectively embedded in the corresponding areas of the foolproof notch 201, so that the position and angle of the terminal 2 in the housing 1 are uniquely defined. If the terminal 2 is installed in an incorrect posture, such as the opening not facing the terminal or rotational displacement, the shape and position of the foolproof notch 201 and the L-shaped protrusion 102 cannot match. The L-shaped protrusion 102 will form a physical block with the non-notch area of ​​the terminal 2, directly preventing the terminal 2 from being installed into the housing 1, thereby forcibly ensuring that the installation posture of the terminal 2 meets the design requirements. The size and orientation of the foolproof notch 201 can vary and be adjusted according to actual design requirements to meet the foolproof requirements of the terminal block 2.

[0032] As an optional specific implementation plan, such as Figure 7 and Figure 8 As shown, the anti-misplacement position is an anti-misplacement groove 202 located at the end of the terminal 2 opposite to the opening, and the second anti-misplacement part is a U-shaped protrusion 105 located inside the housing 1. The two arms of the U-shaped protrusion 105 and the bottom form an enclosing structure, which can achieve multi-directional limiting when engaged with the anti-misplacement groove 202. It can limit the rotational offset of the terminal 2 and constrain its axial movement. Compared with the single-direction anti-misplacement structure, it provides more comprehensive limitation on the installation posture, effectively avoiding the positional offset of the terminal 2 caused by vibration or assembly errors, and eliminating the risk of subsequent incorrect wiring from the root. Moreover, the U-shaped protrusion 105 and the anti-misplacement groove 202 are complementary concave-convex structures, with a larger contact area and tighter fit when engaged. This can enhance the installation stability of the terminal 2 in the housing 1, reduce poor contact problems caused by component loosening under high-voltage working conditions, and indirectly improve the operational reliability of the high-voltage system.

[0033] It is worth mentioning that the system also includes a shielding sleeve 3 and a shielding spring 4. The shielding sleeve 3 is disposed inside the housing 1, and the shielding spring 4 is disposed on the inner side of the shielding sleeve 3. The shielding sleeve 3 is disposed inside the housing 1, and the shielding spring 4 is located on the inner side of the shielding sleeve 3. Together, they form a closed electromagnetic shielding space. The shielding sleeve 3, as the basic shielding structure, can prevent the radiation generated by the internal circuit from spreading outward. The shielding spring 4 fits against the inner side of the shielding sleeve 3, further enhancing the shielding effect, while also preventing external electromagnetic interference from entering the housing 1. Through double shielding, an electromagnetic isolation barrier is formed, ensuring that the internal circuit is not affected by external interference and that the external environment is not affected by internal radiation.

[0034] When the wire harness is placed into the junction box, the wire harness compresses the shielding spring 4, causing it to elastically deform and tightly adhere to the surface of the wire harness. At the same time, it cooperates with the shielding sleeve 3 to form a clamping force, which firmly restricts the wire harness within the shielding sleeve 3, preventing the wire harness from loosening or shifting. When the wire harness is pulled out, the shielding spring 4 loses the external force constraint and rebounds to its initial shape by its own elasticity, restoring its clamping ability for subsequent wire harnesses, thus enabling multiple reuses.

[0035] Generally, it also includes a gland 7, a sealing body 5, and a gasket 6. The gland 7 is installed on the terminal block, the sealing body 5 is located inside the housing 1, and the sealing body 5 is located on the side of the shielding sleeve 3 away from the terminal block 2. The gasket 6 is installed between the sealing body 5 and the gland 7. The gland 7 is installed on the terminal block of the housing 1 and cooperates with the thread or snap-fit ​​structure of the terminal block to form the first sealing barrier. The gasket 6 is located between the sealing body 5 and the gland 7, and its elastic material can fill the assembly gap between the two to enhance the sealing tightness. The sealing body 5 is located inside the housing 1 and on the side of the shielding sleeve 3 away from the terminal block 2. When the wire harness is inserted, the sealing body 5 tightly fits the surface of the wire harness to form a second seal. The three together construct a double sealing structure, effectively preventing external dust, moisture, oil and other foreign objects from entering the housing 1. Gland 7 secures the wire harness by tightening or snapping, limiting the axial movement of the wire harness; while the sealing body 5 fits the wire harness, it further assists in clamping the wire harness, forming a double fixation with gland 7 to prevent the wire harness from shifting due to vibration or external pulling force, and ensuring the stability of the connection between the wire harness and terminal 2.

[0036] In addition, it includes a mounting terminal 9, part of which is located inside the housing 1 and electrically connected to the wiring terminal 2, and part of which extends out of the housing 1 for connection to the equipment.

[0037] Optionally, the housing 1 includes a base 103 and a top cover 104. The top cover 104 is detachably mounted on the base 103, and the wiring terminal 2 is located inside the base 103. When the housing 1 adopts a structure in which the base 103 and the top cover 104 are detachably connected, it achieves its function through separate bearing and controllable opening and closing. The base 103, as the core bearing component, has a pre-set mounting position for the wiring terminal 2 inside. The wiring terminal 2 can be pre-fixed inside the base 103 to complete the initial assembly. The top cover 104 is detachably connected to the base 103 through snap-fit, threaded connection, or other means. When it is necessary to assemble, repair, or replace the internal wiring terminal 2, the top cover 104 can be removed to completely expose the internal space of the base 103. After the operation is completed, the top cover 104 is reinstalled on the base 103 to form a closed housing 1 structure, thereby protecting the internal components.

[0038] Meanwhile, a first sealing ring 8 is provided at the connection between the base 103 and the upper cover 104. When the base 103 and the upper cover 104 are closed, the first sealing ring 8 is squeezed by the connection surface of the two and undergoes elastic deformation. The deformed sealing ring tightly fills the gap between the base 103 and the upper cover 104, forming a continuous sealing barrier. This barrier can prevent foreign objects such as dust, water vapor, and oil from entering the interior of the housing 1 through the connection between the base 103 and the upper cover 104. At the same time, it can also prevent the high-pressure components inside the housing 1 from directly contacting the external environment, thereby achieving sealed protection for the internal components of the housing 1.

[0039] In addition, the mounting end is provided with a second sealing ring, which can seal the connection between the mounting end and the panel. The second sealing ring forms a specific seal for the connection gap between the mounting end and the panel, forming a dual sealing system with the first sealing ring 8 between the base 103 and the top cover 104 for the interior of the housing 1 and the mounting interface. This comprehensively covers any possible leaks in the housing 1, significantly improving the overall waterproof, dustproof, and oil-proof capabilities of the metal junction box, and ensuring the durability of internal components in complex environments. Moreover, the connection between the mounting end and the panel needs to balance fixed reliability and ease of assembly, inevitably resulting in some gaps. The second sealing ring precisely fills these gaps through elastic deformation, compensating for the sealing shortcomings of the connection structure without affecting the normal fit between the mounting end and the panel, ensuring that installation and sealing protection do not interfere with each other.

[0040] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A metal junction box, characterized in that, include: The housing (1) and the terminal block (2) are provided. The housing (1) has a terminal block and a mounting end. The mounting end can be connected to the panel and is provided with a first anti-foolproof part that cooperates with the panel to prevent fooling. The terminal block (2) is installed inside the housing (1) and the opening of the terminal block (2) faces the terminal block. The terminal block (2) is provided with an anti-foolproof position. The housing (1) is provided with a second anti-foolproof part that cooperates with the anti-foolproof position to prevent fooling.

2. The metal junction box according to claim 1, characterized in that, The first anti-mistake part is an anti-mistake post (101) protruding from the mounting end.

3. The metal junction box according to claim 2, characterized in that, The number of the anti-foolproof post (101) is one, and the anti-foolproof post (101) can be combined with a corresponding hole on the panel to achieve anti-foolproofing.

4. The metal junction box according to any one of claims 1-3, characterized in that, The foolproof position is a foolproof notch (201) located on the terminal block (2) away from the opening, and the second foolproof part is an L-shaped protrusion (102) located inside the housing (1).

5. The metal junction box according to any one of claims 1-3, characterized in that, The anti-foolproof position is an anti-foolproof groove (202) located on the terminal block (2) away from the opening, and the second anti-foolproof part is a U-shaped protrusion (105) located inside the housing (1).

6. The metal junction box according to any one of claims 1-3, characterized in that, It also includes a shielding sleeve (3) and a shielding spring (4), wherein the shielding sleeve (3) is disposed inside the housing (1) and the shielding spring (4) is disposed on the inner side of the shielding sleeve (3).

7. The metal junction box according to claim 6, characterized in that, It also includes a gland (7), a sealing body (5) and a gasket (6). The gland (7) is installed on the terminal block. The sealing body (5) is located inside the housing (1) and is located on the side of the shielding sleeve (3) away from the terminal block (2). The gasket (6) is installed between the sealing body (5) and the gland (7).

8. The metal junction box according to any one of claims 1-3, characterized in that, The housing (1) includes a base (103) and a top cover (104), the top cover (104) being detachably mounted on the base (103), and the wiring terminal (2) being located inside the base (103).

9. The metal junction box according to claim 8, characterized in that, A first sealing ring (8) is provided at the connection between the base (103) and the top cover (104).

10. The metal junction box according to any one of claims 1-3, characterized in that, The mounting end is provided with a second sealing ring, which can seal the connection between the mounting end and the panel.

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