Junction box

Abstract

The utility model discloses a junction box, which comprises a box cover, a bottom plate, a diode, a terminal assembly and a cable, the diode is arranged on the bottom plate; the box cover is buckled on the bottom plate, the windward side of the box cover is in a fin shape, and the leeward side of the box cover is provided with a wiring hole; the terminal assembly is arranged in the wiring hole; the cable is arranged in the terminal assembly in a penetrating mode and extends into the box cover, and the inner end of the cable is connected with the diode. The junction box comprises a box cover and a bottom plate, the box cover is buckled on the bottom plate, the windward side of the box cover is in a fin shape, the box cover is provided with a smoother curved surface and has a lower wind resistance coefficient, and wind resistance generated by loading and driving is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of photovoltaic panel wiring devices, and more particularly to a junction box. Background Technology

[0002] RV travel has become a popular travel style in recent years. RVs, also known as homes on wheels, combine the functions of a house and a vehicle, allowing for both travel and home living on long journeys. RVs are typically equipped with numerous home amenities, including bedding, stoves, refrigerators, cabinets, sofas, dining tables and chairs, bathroom facilities, air conditioning, televisions, and stereos, making them a unique type of vehicle that integrates clothing, food, shelter, and transportation all in one vehicle. Many of the home amenities in RVs, such as stoves, refrigerators, bathroom facilities, air conditioning, televisions, and stereos, rely on electricity; therefore, most modern RVs are equipped with solar energy storage systems.

[0003] The solar energy storage system mainly includes photovoltaic panels, energy storage batteries, and a controller. The photovoltaic panels are installed on the roof of the RV, and there is also a junction box on the photovoltaic panel. Cables are led out from the junction box and connected to the controller, which is connected to the energy storage battery.

[0004] Junction boxes are protective structures for connecting cables to photovoltaic panels. Most existing junction boxes are square boxes, which have the problem of high wind resistance coefficient. Utility Model Content

[0005] In order to solve the technical problem of high wind resistance coefficient in existing roof-mounted junction boxes, one of the objectives of this utility model is to provide a junction box.

[0006] One of the objectives of this utility model is achieved through the following technical solution:

[0007] A junction box includes a cover, a base plate, diodes, a terminal assembly, and cables;

[0008] The diode is disposed on the base plate;

[0009] The lid is fastened to the base plate, the windward side of the lid is fin-shaped, and the leeward side of the lid is provided with wiring holes;

[0010] The terminal assembly is disposed in the wiring hole;

[0011] The cable passes through the terminal assembly and extends into the cover, with the inner end of the cable connected to the diode.

[0012] Optionally, the rear portion of the windward side extends toward the leeward side and crosses the leeward side;

[0013] The leeward side includes a back plate and a transition surface, the transition surface connecting the back plate and the rear edge of the windward side.

[0014] Optionally, the front and two sides of the lid are the windward side, and the back of the lid is the leeward side.

[0015] Optionally, the upper surface edge of the base plate is provided with a first adhesive groove, the first adhesive groove facing the lower edge of the box cover;

[0016] The lower edge of the box lid is embedded in the first adhesive groove.

[0017] Optionally, the upper surface edge of the base plate is provided with a glue-blocking protrusion, the glue-blocking protrusion extends along the edge of the base plate, and the area between the outer side of the glue-blocking protrusion and the edge of the base plate is the first glue groove;

[0018] The lower edge of the lid has a sealing protrusion that extends along the lower edge of the lid and is embedded in the first adhesive groove.

[0019] Optionally, the lower surface of the base plate is provided with a second adhesive groove for sealing and bonding the photovoltaic panel.

[0020] Optionally, the terminal assembly includes an outer terminal, a sealing gasket, and a locking nut;

[0021] One end of the external terminal is provided with a first connecting part, which extends into the wiring hole;

[0022] The locking nut is located inside the box cover and is connected to the first connecting part;

[0023] The sealing gasket is fitted onto the first connecting portion and is located between the outer terminal and the box cover;

[0024] The cable passes through the outer terminal and extends into the cover through the first connection portion.

[0025] Optionally, the external terminal includes a connector and a rubber sleeve;

[0026] One end of the connector is provided with the first connecting part, and the other end of the connector is provided with the second connecting part;

[0027] The first end of the rubber sleeve is fitted onto the second connecting part.

[0028] Optionally, the second end of the rubber sleeve is provided with an elastic portion, which spirally wraps around the surface of the cable along the length of the cable.

[0029] Optionally, the connector has a central nut at its center.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] In this utility model, the junction box includes a cover and a base plate. The cover is fastened to the base plate. The windward side of the cover is fin-shaped. The cover has a smoother and more fluid curved surface, resulting in a lower drag coefficient and reducing wind resistance during vehicle operation. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the junction box of this utility model;

[0033] Figure 2 This is a schematic diagram of the junction box of this utility model from another perspective;

[0034] Figure 3 This is an exploded view of the junction box of this utility model;

[0035] Figure 4 This is an exploded view of the terminal assembly in the junction box of this utility model;

[0036] Figure 5 This is a cross-sectional schematic diagram of the junction box of this utility model;

[0037] Figure 6 for Figure 5 A magnified view of a local area A in the middle.

[0038] Explanation of reference numerals in the attached diagram:

[0039] 1. Lid; 11. Windward side; 12. Leeward side; 13. Wiring hole; 14. Sealing protrusion;

[0040] 2. Base plate; 21. Adhesive-blocking protrusion; 22. First adhesive groove; 23. Second adhesive groove;

[0041] 3. Diode;

[0042] 4. Terminal assembly; 41. External terminal; 411. Connector; 4111. First connecting part; 4112. Second connecting part; 4113. Intermediate nut; 412. Rubber sleeve; 42. Sealing gasket; 43. Locking nut;

[0043] 5. Cables. Detailed Implementation

[0044] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 6 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0047] This utility model provides a junction box, such as Figures 1 to 3 As shown, the junction box includes a cover 1, a base plate 2, a diode 3, a terminal assembly 4, and a cable 5. The diode 3 is mounted on the base plate 2. The cover 1 is fastened to the base plate 2. The windward side 11 of the cover 1 is fin-shaped, and the leeward side 12 of the cover 1 has a wiring hole 13. The terminal assembly 4 is located in the wiring hole 13. The cable 5 passes through the terminal assembly 4 and extends into the cover 1. The inner end of the cable 5 is connected to the diode 3. The junction box includes a cover 1 and a base plate 2. The cover 1 is fastened to the base plate 2. The windward side 11 of the cover 1 is fin-shaped. The cover 1 has a smoother and more streamlined curved surface, resulting in a lower drag coefficient and reducing wind resistance during vehicle operation.

[0048] Among them, such as Figure 2 As shown, the rear of the windward side 11 extends towards and beyond the leeward side 12. The leeward side 12 includes a back plate and a transition surface, which connects the back plate and the rear edge of the windward side 11. The rear of the windward side 11 extends beyond the leeward side 12, thus forming a tail fin effect. By controlling the downforce of the airflow at the rear of the junction box, the rear of the windward side 11 can counteract some of the lift, reducing air resistance. Furthermore, the structure of the windward side 11 also enhances the aesthetics of the junction box and increases its aerodynamic sophistication.

[0049] Specifically, the front and two sides of the lid 1 are the windward side 11, and the back of the lid 1 is the leeward side 12.

[0050] Photovoltaic panels and junction boxes are exposed to sunlight and rain for extended periods. The junction box, which protects the connection between the cable 5 and the photovoltaic panel, is susceptible to internal dampness and even water ingress after prolonged use. In some embodiments of the base plate 2, such as... Figure 5 , Figure 6 As shown, the upper surface edge of the base plate 2 is provided with a first adhesive groove 22, which faces the lower edge of the lid 1. The lower edge of the lid 1 is embedded in the first adhesive groove 22. In this embodiment, the first adhesive groove 22 is provided on the upper surface edge of the base plate 2, so that sealant can be filled into the first adhesive groove 22 during assembly. When the lid 1 is fastened onto the base plate 2, the lower edge of the lid 1 is embedded in the first adhesive groove 22, and the lower edge of the lid 1 compresses the sealant, causing the sealant to spread evenly, thereby sealing the gap between the lid 1 and the base plate 2.

[0051] For the first adhesive groove 22, specifically, as follows Figure 6 As shown, the upper surface edge of the base plate 2 is provided with a glue-blocking protrusion 21, which extends along the edge of the base plate 2. The area between the outer side of the glue-blocking protrusion 21 and the edge of the base plate 2 is the first glue groove 22. In addition, the lower edge of the lid 1 is provided with a sealing protrusion 14, which extends along the lower edge of the lid 1 and is embedded in the first glue groove 22.

[0052] Furthermore, such as Figure 6 As shown, the lower surface edge of the base plate 2 is provided with a second adhesive groove 23 for sealing and bonding the photovoltaic panel. The base plate 2 has a through hole through which the photovoltaic panel's wiring is introduced into the junction box. During assembly, sealant is filled into the second adhesive groove 23, thus sealing the gap between the base plate 2 and the photovoltaic panel. In this embodiment, the gap between the box cover 1 and the base plate 2 is sealed by the sealant within the first adhesive groove 22, and the gap between the base plate 2 and the photovoltaic panel is sealed by the sealant within the second adhesive groove 23, achieving a complete seal between the junction box and the photovoltaic panel and improving the assembly sealing effect of the junction box and the photovoltaic panel.

[0053] In some embodiments of terminal assembly 4, such as Figure 3 , Figure 4 As shown, the terminal assembly 4 includes an outer terminal 41, a sealing gasket 42, and a locking nut 43. One end of the outer terminal 41 has a first connecting portion 4111, which extends into the wiring hole 13. The locking nut 43 is located inside the cover 1 and is connected to the first connecting portion 4111. The sealing gasket 42 is fitted onto the first connecting portion 4111 and is located between the outer terminal 41 and the cover 1. The cable 5 passes through the outer terminal 41 and through the first connecting portion 4111, extending into the cover 1. In this embodiment, the outer terminal 41 extends into the cover 1 through the first connecting portion 4111, the locking nut 43 locks the first connecting portion 4111, and the sealing gasket 42 is placed between the outer terminal 41 and the cover 1. Thus, the locking nut 43 stably assembles the terminal assembly 4, and the sealing gasket 42 improves the sealing effect of the connection between the terminal assembly 4 and the cover 1.

[0054] For external terminal 41, specifically, as follows Figure 4As shown, the outer terminal 41 includes a connector 411 and a rubber sleeve 412. One end of the connector 411 has a first connecting portion 4111, and the other end of the connector 411 has a second connecting portion 4112. The first end of the rubber sleeve 412 is fitted onto the second connecting portion 4112. Of course, in order to maintain the integrity of the outer terminal 41, when assembling the connector 411 and the rubber sleeve 412, adhesive is applied to the inner surface of the rubber sleeve 412 or the outer surface of the second connecting portion 4112 to improve the stability of the rubber sleeve 412 and the connector 411 and prevent the rubber sleeve 412 from loosening during the assembly of the terminal assembly 4.

[0055] Specifically, for the cable 5 passing through the outer terminal 41, it passes sequentially through the rubber sleeve 412 and the connector 411. The cable 5 is sealed to the connector, for example, by applying sealant to the surface of the cable 5 as it passes through the connector.

[0056] In addition, such as Figure 4 As shown, the first end of the rubber sleeve 412 is nut-shaped, so that the rubber sleeve 412 can be firmly connected to the second connecting part 4112 of the connector 411 with the help of a tool.

[0057] Furthermore, the second end of the rubber sleeve 412 is provided with an elastic part, which spirally wraps around the surface of the cable 5 along the length of the cable 5. The elastic part increases the bending angle of the section where the cable 5 connects to the terminal assembly 4, preventing the cable 5 from bending or bending at a large angle when connected to the terminal assembly 4, and preventing mechanical damage to the cable 5.

[0058] In some embodiments of connector 411, such as Figure 4 As shown, a middle nut 4113 is provided in the middle of the connector 411. By providing a middle nut 4113 in the middle of the connection, the middle nut 4113 and the locking nut 43 can be directly tightened using tools, thereby improving the firmness of the assembly.

[0059] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A terminal block, characterized by The box cover, the bottom plate, the diode, the terminal assembly and the cable are included. The diode is arranged on the bottom plate. The box cover is buckled on the bottom plate, the windward surface of the box cover is in the shape of a fish fin, and the leeward surface of the box cover is provided with a wiring hole. The terminal assembly is arranged in the wiring hole. The cable is arranged in the terminal assembly and extends into the box cover, and the inner end of the cable is connected with the diode.

2. The junction box of claim 1, wherein, The rear part of the windward surface extends to the leeward surface and beyond the leeward surface. The leeward surface includes a back plate and a transition surface, and the transition surface connects the back plate and the rear edge of the windward surface.

3. The terminal block of claim 1 or 2, wherein, The front surface and the two side surfaces of the box cover are the windward surface, and the back surface of the box cover is the leeward surface.

4. The junction box of claim 1, wherein, The upper surface edge of the bottom plate is provided with a first glue groove, and the first glue groove is towards the lower edge of the box cover. The lower edge of the box cover is embedded in the first glue groove.

5. The junction box of claim 4, wherein, The upper surface edge of the bottom plate is provided with a glue blocking protrusion, the glue blocking protrusion extends along the edge of the bottom plate, and the area between the outside of the glue blocking protrusion and the edge of the bottom plate is the first glue groove. The inner part of the lower edge of the box cover is provided with a sealing protrusion, the sealing protrusion extends along the lower edge of the box cover, and the sealing protrusion is embedded in the first glue groove.

6. The junction box of claim 4, wherein, The edge of the lower surface of the bottom plate is provided with a second glue groove for sealing and bonding the photovoltaic panel.

7. The junction box of claim 1, wherein, The terminal assembly includes an outer terminal, a sealing gasket and a locking nut. One end of the outer terminal is provided with a first connecting part, and the first connecting part extends into the wiring hole. The locking nut is located in the box cover, and the locking nut is connected with the first connecting part. The sealing gasket is sleeved on the first connecting part and located between the outer terminal and the box cover. The cable passes through the outer terminal and extends into the box cover through the first connecting part.

8. The junction box of claim 7, wherein, The outer terminal includes a connecting piece and a rubber sleeve. One end of the connecting piece is provided with the first connecting part, and the other end of the connecting piece is provided with a second connecting part. The first end of the rubber sleeve is sleeved on the second connecting part.

9. The junction box of claim 8, wherein, The second end of the rubber sleeve is provided with an elastic part, and the elastic part spirally winds around the surface of the cable along the length direction of the cable.

10. The junction box of claim 8, wherein, The middle part of the connecting piece is provided with an intermediate nut.

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