Waterproof structure of binding post of distribution box

Abstract

The utility model relates to a distribution box binding post waterproof structure, which comprises a box body and a binding post, a circuit board is arranged in the box body, a first fixing groove is arranged on the outer side surface of a distribution box, a wiring hole is arranged in the first fixing groove, the binding post is inserted in the wiring hole, and the wiring hole is arranged in the wiring hole. The binding post is provided with a protruding part matched with the first fixing groove, the binding post is sleeved with a sealing ring, the two ends of the sealing ring abut against the protruding part and the first fixing groove respectively, the end, located on the outer side of the box body, of the binding post is in threaded connection with a locking assembly, and the circuit board is provided with an arched conducting strip. The arched side of the conducting strip is a clamping part, the clamping part abuts against the inner side of the box body, and the end, located in the box body, of the binding post penetrates through the clamping part. The waterproof structure is independent of the distribution box, is not integrated with the distribution box through injection molding, and has the advantages of being convenient to disassemble and assemble, low in cost and good in waterproof effect.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive electronic products, and particularly relates to a waterproof structure for a wiring terminal of a distribution box. Background Technique

[0002] At present, new energy vehicles in China have entered a stage of rapid development, and higher requirements are also imposed on the electronic control systems of new energy vehicles. During the operation of new energy vehicles, they will inevitably encounter various harsh weather conditions, such as heavy rain, floods, etc. These weather conditions pose strict requirements on the waterproof performance of the vehicle's electrical system. As one of the core components of the electrical system, the waterproof performance of the distribution box is directly related to the stability and safety of the vehicle's electrical system. If the waterproof performance of the distribution box is poor, it is easy to occur short circuits, leakage and other faults in a humid or flooded environment, and in severe cases, it may cause fires or electric shock accidents.

[0003] At present, the common method for the wiring terminal part of the distribution box is to integrally embed and inject the conductive copper row part with the inside of the distribution box body, or to integrally inject the conductive copper row together with the wiring terminal bolt with the distribution box body. This method not only has a high cost, but also due to the different thermal expansion coefficients of metal and plastic, the two cannot be tightly combined together, resulting in waterproof failure and unable to effectively ensure the waterproof performance of the distribution box. Content of the Utility Model

[0004] In view of this, to solve the problems existing in the above background technique, the utility model provides a waterproof structure for a wiring terminal of a distribution box with low cost and good waterproof effect.

[0005] A waterproof structure for a wiring terminal of a distribution box includes a box body and a wiring terminal. A circuit board is installed inside the box body. A first fixing groove is provided on the outer surface of the distribution box. A wiring hole is opened in the first fixing groove. The wiring terminal is inserted into the wiring hole. The wiring terminal is provided with a protruding part that matches the first fixing groove. A sealing ring is sleeved on the wiring terminal. Two ends of the sealing ring respectively abut against the protruding part and the first fixing groove. A locking component is threadedly connected to one end of the wiring terminal located outside the box body. An arched conductive sheet is provided on the circuit board. One arched side of the conductive sheet is a clamping part. The clamping part abuts against the inner side of the box body. One end of the wiring terminal located inside the box body penetrates through the clamping part.

[0006] In the above technical solution, a cavity for accommodating the circuit board is provided inside the box body, and the terminal is inserted into the box body through the wiring hole provided on the box body, and the protrusion on the terminal is located on the outside of the box body and is installed in the first fixing groove on the outer surface of the box body, wherein a sealing ring is sleeved on the terminal post, and the sealing ring is located between the protrusion and the bottom surface of the first fixing groove, and a thread is provided at the end of the terminal post located on the outside of the box body, and the locking assembly is threadedly connected to the terminal post through the thread, and after the terminal post is assembled with the box body, the protrusion presses the sealing ring on the peripheral side of the wiring hole in the first fixing groove, and the protrusion can be locked in the first fixing groove by adjusting the locking assembly, thereby The sealing ring is tightened to seal the terminal and the terminal hole to prevent water from entering. A conductive sheet is provided on the circuit board inside the box body. The conductive sheet is arched on the circuit board, and the arched part is a clamping part. The side of the clamping part close to the inner side of the box body is flat and abuts against the inner surface of the box body. The end of the terminal located on the inner side of the box body passes through the clamping part of the conductive sheet, and the circuit board and the terminal are electrically connected through the conductive sheet. After the terminal and the box body are assembled and locked, the clamping part and the protrusion clamp the box body to limit the box body, reduce the shaking of the box body during the driving of the car, avoid the generation of fine gaps, and enhance the waterproof effect.

[0007] Furthermore, the terminal is also provided with an annular portion, the annular portion cooperates with the wiring hole, one end of the annular portion is connected to the protruding portion, and the sealing ring is sleeved at the connection between the annular portion and the protruding portion.

[0008] In the above technical solution, the annular portion protrudes on the circumferential surface of the terminal, the width of the annular portion is smaller than the width of the protruding portion, one end of the annular portion is connected to the end of the protruding portion, the annular portion cooperates with the wiring hole, after the terminal and the box body are assembled, the annular portion is located in the wiring hole, the sealing ring is sleeved on the annular portion and is located at the junction of the protruding portion and the annular portion, and the sealing ring is pressed against the edge of the wiring hole through the protruding portion to perform sealing.

[0009] Further, the thickness of the annular portion is greater than the depth of the wiring hole, and one end of the annular portion away from the protruding portion is in contact with the clamping portion.

[0010] In the above technical solution, since the connection method between the terminal and the conductive sheet is plug-in, there may be a tiny gap between the two. Under the influence of external vibration, the terminal and the conductive sheet may be disconnected, affecting the use. Therefore, the thickness of the annular portion is set to be slightly larger than the depth of the wiring hole, so that after the terminal is assembled and locked with the box body, the clamping portion surface of the conductive sheet can fully contact with the annular portion, ensuring that the conduction is not affected and improving reliability.

[0011] Furthermore, a sealing groove matching with the sealing ring is provided on the edge of the opening of the wiring hole.

[0012] In the above technical solution, the sealing groove is used to place the sealing ring and guide the compression direction of the sealing ring, so that the sealing ring can accurately play a sealing role at the position of the wiring hole.

[0013] Further, the first fixing groove is in a polygonal shape, and the protruding portion is matched with the shape of the first fixing groove.

[0014] In the above technical solution, the first fixing groove is set in a polygonal shape, so that when the locking assembly is rotated and adjusted, the terminal will not rotate along with it, and the installation process is more convenient.

[0015] Further, sealant is filled between the side surface of the protruding portion and the side wall of the first fixing groove.

[0016] In the above technical solution, by filling the sealant, water can be prevented from entering the bottom of the first fixing groove, further enhancing the waterproof effect.

[0017] Further, connecting portions are formed by bending both sides of the clamping portion, and sockets connected to the connecting portions are provided on the circuit board.

[0018] In the above technical solution, the connecting portions are formed by bending both sides of the clamping portion, so that there is a spacing between the clamping portion and the circuit board, and the ends of the connecting portions are electrically connected to the circuit board through the sockets.

[0019] Further, the locking assembly is also threadedly connected to the end of the terminal located inside the box body, and an avoidance hole for arranging the locking assembly is formed on the circuit board, and the avoidance hole is located between the two sockets.

[0020] In the above technical solution, an avoidance hole is formed on the circuit board to make way for the locking assembly, facilitating assembly. When the locking assembly is locked, the pressure exerted by it is concentrated on the side of the clamping portion close to the circuit board.

[0021] Further, a second fixing groove is provided at the position of the wiring hole on the inner side of the box body, and the second fixing groove is matched with the conductive sheet.

[0022] In the above technical solution, the width of the second fixing groove is matched with the conductive sheet, and one end of the clamping portion of the conductive sheet is arranged in the second fixing groove.

[0023] Further, the locking assembly includes a nut and a gasket.

[0024] In the above technical solution, the nut and the gasket are sleeved on the terminal. Threads are provided at both ends of the terminal, and the terminal is locked by adjusting the nut. The gasket is used to provide buffering during adjustment.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] The terminal and the conductive sheet of this application are both independently arranged and not integrally injection-molded with the distribution box. The overall structure is simple, facilitating disassembly and assembly.

[0027] The waterproof structure of the terminal of this application is connected to the box body of the distribution box through mechanical assembly, without involving injection molding-related processes. The process is simple and the cost is low.

[0028] In this application, a protruding portion is provided on the terminal, and a sealing ring is sleeved on the terminal. The protruding portion presses the sealing ring tightly through the locking assembly to seal the connection between the terminal and the box body to prevent water from entering. In addition, the conductive sheet on the circuit board arches to form a clamping portion for clamping the box body. After the terminal and the box body are assembled and locked, the box body is clamped by the protruding portion of the terminal and the conductive sheet, which can significantly reduce the shaking generated by the box body during the driving of the vehicle, avoid generating minute gaps, and effectively enhance the waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of this application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can also be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a perspective view of the overall distribution box of an embodiment.

[0031] Figure 2 It is Figure 1 The broken view of the distribution box in

[0032] Figure 3 It is Figure 2 The enlarged view of position A in (structural schematic diagram of the waterproof structure of the terminal described in this application).

[0033] Figure 4 It is the top view of the distribution box of this application.

[0034] Figure 5 It is Figure 4 The cross-sectional view at the A-A position in

[0035] Figure 6 It is Figure 5 The enlarged view of position B in

[0036] Figure 7 It is the structural schematic diagram of the box body described in this application.

[0037] Figure 8For Figure 7 An enlarged view of position C in

[0038] Figure 9 A schematic structural diagram of the circuit board and the conductive sheet described in this application (in an exploded state).

[0039] Explanation of the reference numerals in the figure:

[0040] 1 - box body; 11 - first fixing groove; 12 - wiring hole; 121 - sealing groove; 13 - second fixing groove; 2 - terminal; 21 - protruding part; 22 - annular part; 23 - sealing ring; 24 - locking assembly; 241 - nut; 242 - gasket; 3 - circuit board; 31 - socket; 32 - clearance hole; 4 - conductive sheet; 41 - clamping part; 42 - connecting part; 421 - plug. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts fall within the scope of protection of this application.

[0043] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] Please refer to Figures 1 to 9In a preferred embodiment of the present application, a waterproof structure of a terminal 2 of a distribution box is provided, wherein the distribution box includes a box body 1, and a terminal 2 arranged on the box body 1, a circuit board 3 is installed inside the box body 1, a first fixing groove 11 is provided on the outer surface of the distribution box, a wiring hole 12 is opened in the first fixing groove 11, the terminal 2 is inserted into the wiring hole 12, the terminal 2 is provided with a protrusion 21 matching the first fixing groove 11, a sealing ring 23 is sleeved on the terminal 2, and the two ends of the sealing ring 23 are respectively abutted against the protrusion 21 and the first fixing groove 11, one end of the terminal 2 located on the outside of the box body 1 is threadedly connected with a locking assembly 24, an arched conductive sheet 4 is provided on the circuit board 3, and the arched side of the conductive sheet 4 is a clamping portion 41, the clamping portion 41 is abutted against the inner side of the box body 1, and one end of the terminal 2 located inside the box body 1 passes through the clamping portion 41.

[0045] The interior of the box body 1 is hollow, the circuit board 3 is installed inside the box body 1, and the terminal 2 is inserted into the box body 1 through the wiring hole 12 provided on the box body 1. Figure 1 As shown, a plurality of terminals 2 are mounted on the box body 1, each terminal 2 is provided with a protrusion 21, and after the terminal 2 is installed, the protrusion 21 is located on the outside of the box body 1 and is installed in the first fixing groove 11 on the outer surface of the box body 1, wherein a sealing ring 23 is sleeved on the terminal 2, and the sealing ring 23 is located between the protrusion 21 and the bottom surface of the first fixing groove 11, and the top end (in the direction shown in the figure) of the terminal 2 is provided with a thread, and the locking assembly 24 is threadedly connected to the terminal 2 through the thread, and after the terminal 2 is assembled with the box body 1, the protrusion 21 presses the sealing ring 23 on the peripheral side of the wiring hole 12 in the first fixing groove 11, and the protrusion 21 can be locked in the first fixing groove 11 by adjusting the locking assembly 24, thereby The sealing ring 23 is compressed, and the sealing ring 23 is used to seal the connection post 2 and the connection hole 12 to prevent water from entering. A conductive sheet 4 is provided on the circuit board 3 inside the box body 1. The conductive sheet 4 is arched and arranged on the circuit board 3. The arched part is a clamping portion 41. The top surface of the clamping portion 41 is a plane, which abuts against the inner surface of the box body 1. The bottom end of the connection post 2 passes through the clamping portion 41 of the conductive sheet 4, and the circuit board 3 and the connection post 2 are electrically connected through the conductive sheet 4. After the connection post 2 is assembled and locked with the box body 1, the clamping portion 41 and the protrusion 21 clamp the box body 1 to limit the box body 1, reduce the shaking of the box body 1 during the driving of the car, avoid the generation of fine gaps, and enhance the waterproof effect.

[0046] Preferably, the conductive sheet 4 is made of copper, which has good conductivity.

[0047] Please refer to Figure 2 and Figure 6, in this embodiment, the terminal 2 is further provided with an annular portion 22. The annular portion 22 protrudes and is distributed on the circumferential side surface of the terminal 2. The width of the annular portion 22 is smaller than the width of the protruding portion 21. One end of the annular portion 22 is connected to the end of the protruding portion 21. The annular portion 22 is matched with the wiring hole 12. After the terminal 2 is assembled with the box body 1, the annular portion 22 is located in the wiring hole 12. The sealing ring 23 is sleeved on the annular portion 22 and is located at the junction of the protruding portion 21 and the annular portion 22. The sealing ring 23 is pressed against the edge of the wiring hole 12 by the protruding portion 21 for sealing.

[0048] Please refer to Figure 2 and Figure 6 , in this embodiment, since the connection mode between the terminal 2 and the conductive sheet 4 is plug-in connection, there may be a tiny gap between the two. Under the influence of external vibration, there is a possibility of disconnection between the terminal 2 and the conductive sheet 4, affecting the use. Therefore, the thickness of the annular portion 22 is set to be greater than the depth of the wiring hole 12, so that after the terminal 2 is assembled and locked with the box body 1, the surface of the clamping portion 41 of the conductive sheet 4 can be in full contact with the annular portion 22, ensuring that the conduction is not affected and improving the reliability.

[0049] Preferably, the thickness of the annular portion 22 is 0.2 - 0.3 mm greater than the depth of the wiring hole 12, so that the annular portion 22 and the conductive sheet 4 can be in full contact after locking, ensuring that the conduction is not affected.

[0050] Please refer to Figure 8 , in this implementation, the edge of the orifice of the wiring hole 12 is provided with a sealing groove 121 that is matched with the sealing ring 23. The sealing groove 121 is used to place the sealing ring 23 and guide the compression direction of the sealing ring 23, so that the sealing ring 23 can accurately play a sealing role at the position of the wiring hole 12. Specifically, the sealing groove 121 is formed by chamfering the edge of the wiring hole 12.

[0051] Please refer to Figures 1 to 4 , in this embodiment, preferably, the first fixing groove 11 is rectangular in shape, and the protruding portion 21 is matched with the shape of the first fixing groove 11 and is also a rectangular block structure. The protruding portion 21 and the first fixing groove 11 are set to be rectangular in shape, so that when the locking component 24 is rotated and adjusted, the terminal 2 will not rotate together with the nut 241.

[0052] In other embodiments, the first fixing groove 11 and the protruding portion 21 are set to be polygonal in shape, which can ensure that when the locking component 24 is adjusted, the terminal 2 will not rotate together with the locking component 24.

[0053] Please refer to Figure 1 and Figure 2, in this embodiment, the thickness of the protruding portion 21 is greater than the depth of the first fixing groove 11. When the terminal 2 is assembled with the box body 1, the side surface of the protruding portion 21 is higher than the side wall of the first fixing groove 11. Among them, a sealant (not shown in the figure) is filled between the protruding portion 21 and the side wall of the first fixing groove 11. By filling the sealant, water can be prevented from entering the bottom of the first fixing groove 11, further enhancing the waterproof effect.

[0054] Please refer to Figure Figure 3 and 9 , in this embodiment, connecting portions 42 are formed by bending both sides of the clamping portion 41. Each side of the connecting portion 42 includes a plurality of plugs 421 arranged at intervals. Sockets 31 for plugging the plugs 421 are provided on the circuit board 3. Specifically, the end plugs 421 of the connecting portion 42 are inserted into the sockets 31 and fixed to the circuit board 3 by welding. The conductive sheet 4 is electrically connected to the circuit board 3 through the connecting portion 42, enabling the terminal 2 to be conducted with the circuit board 3 to achieve the connection function of the terminal 2. A clearance hole 32 is provided between the two sockets 31 for yielding to the locking assembly 24 on the terminal 2 to facilitate assembly. When the locking assembly 24 is locked, the pressure exerted by it is concentrated at the bottom of the clamping portion 41 of the conductive sheet 4 and does not exert pressure on the circuit board 3. Through the locking assemblies 24 at both ends of the terminal 2, the protruding portion 21 and the conductive sheet 4 clamp the box body 1.

[0055] It should be noted that the conductive sheet 4 and the circuit board 3 are integrally connected by wave soldering in advance. After the connection between the conductive sheet 4 and the circuit board 3 is completed, the installation of the terminal 2 and the box body 1 is carried out.

[0056] Please refer to Figures 2 to 6 , in this embodiment, a second fixing groove 13 is provided at the position of the wiring hole 12 on the inner side of the box body 1. The second fixing groove 13 cooperates with the conductive sheet 4 for installing the conductive sheet 4. The clamping portion 41 of the conductive sheet 4 is arranged in the second fixing groove 13, and the connecting portions 42 on both sides abut against the side walls of the second fixing groove 13.

[0057] Please refer to Figures 1 to 6 , in this embodiment, threads are provided at both ends of the terminal 2, and locking assemblies 24 are threadedly connected to both ends. The locking assembly 24 includes a nut 241 and a gasket 242. The nut 241 and the gasket 242 are sleeved on the terminal 2, and the nut 241 is adjusted for locking. The gasket 242 is used to provide buffering during locking; in addition to using the nut 241, other threaded fastening parts can also be selected, which are not specifically limited here.

[0058] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0059] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention.

[0060] 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, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0061] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A waterproof structure for a terminal of a distribution box, comprising a box body and a terminal, wherein a circuit board is installed inside the box body, characterized in that: The outer surface of the distribution box is provided with a first fixing groove, a wiring hole is opened in the first fixing groove, the terminal is inserted in the wiring hole, the terminal is provided with a protrusion matched with the first fixing groove, a sealing ring is sleeved on the terminal, the two ends of the sealing ring are respectively abutted against the protrusion and the first fixing groove, one end of the terminal located on the outside of the box body is threadedly connected with a locking assembly, the circuit board is provided with an arched conductive sheet, the arched side of the conductive sheet is a clamping portion, the clamping portion is abutted against the inner side of the box body, and one end of the terminal located inside the box body passes through the clamping portion.

2. The waterproof structure of the terminal post of the distribution box according to claim 1 is characterized in that: The terminal post is also provided with an annular portion, the annular portion matches the wiring hole, one end of the annular portion is connected to the protruding portion, and the sealing ring is sleeved at the connection between the annular portion and the protruding portion.

3. The waterproof structure of the terminal post of the distribution box according to claim 2 is characterized in that: The thickness of the annular portion is greater than the depth of the wiring hole, and one end of the annular portion away from the protruding portion is in contact with the clamping portion.

4. The waterproof structure of the terminal post of the distribution box according to claim 3 is characterized in that: The opening edge of the wiring hole is provided with a sealing groove matched with the sealing ring.

5. The waterproof structure of the terminal post of the distribution box according to claim 1 is characterized in that: The first fixing groove is in a polygonal shape, and the protruding portion matches the shape of the first fixing groove.

6. The waterproof structure of the terminal post of the distribution box according to claim 5, characterized in that: The space between the side surface of the protruding portion and the side wall of the first fixing groove is filled with sealant.

7. The waterproof structure of the terminal post of the distribution box according to claim 1 is characterized in that: Both sides of the clamping portion are bent to form a connecting portion, and the circuit board is provided with a socket connected to the connecting portion.

8. The waterproof structure of the terminal post of the distribution box according to claim 7, characterized in that: One end of the terminal located inside the box body is also threadedly connected to the locking assembly, and a clearance hole for the locking assembly to be set is opened on the circuit board, and the clearance hole is located between the two sockets.

9. The waterproof structure of the terminal post of the distribution box according to claim 8, characterized in that: A second fixing groove is provided inside the box body at the position of the wiring hole, and the second fixing groove matches with the conductive sheet.

10. The waterproof structure of the terminal post of the distribution box according to claim 1, characterized in that: The locking assembly includes a nut and a washer.

Images