Buckle type integrated extrusion waterproof junction box

Abstract

The utility model relates to the technical field of junction boxes, and discloses a buckle type integrated extrusion waterproof junction box which comprises an upper cover, a lower shell is arranged on the lower surface of the upper cover, a sealing ring is arranged in the upper cover, a cable seat is fixedly connected in the lower shell, a fixing assembly is arranged in the upper cover, and a sealing assembly is arranged in the upper cover. The fixing assembly comprises a plastic buckle, the side wall of the plastic buckle is fixedly connected to the side wall of the upper cover, a clamping groove is formed in the side wall of the lower shell, and a reinforcing column is fixedly connected to the interior of the upper cover. According to the utility model, the plastic buckles are matched with the clamping grooves, the inclined surfaces of the barb teeth guide the buckles to smoothly slide into the clamping grooves to form interference fit, the junction box is ensured not to loosen in a vibration environment, and meanwhile, the reinforcing columns are in sliding fit with the plug bushes, so that a pre-positioning effect is achieved, dislocation gaps of side walls are reduced, stress of the buckles is dispersed, and the reliability of the junction box is improved. Local stress concentration is avoided, and the installation efficiency of equipment is improved through the structure.

Description

Technical Field

[0001] This utility model relates to the field of junction box technology, and in particular to a snap-fit ​​integrated extrusion waterproof junction box. Background Technology

[0002] In modern electrical systems, waterproof junction boxes, as core components for circuit branching, connection, and protection, are widely used in outdoor lighting, new energy equipment, and industrial automation. With the continuous expansion of electrical equipment application scenarios, such as wind power stations, rail transit, and coastal facilities in complex environments, higher demands are placed on the waterproof performance, structural stability, and ease of installation of waterproof junction boxes. Reliable waterproof junction boxes not only need to effectively resist water and dust intrusion but also need to maintain firm connections under frequent vibration or harsh operating conditions, while meeting the requirements for rapid assembly to adapt to the trend of high efficiency in engineering construction and equipment maintenance.

[0003] Currently, most waterproof junction boxes on the market use threaded connections or bolt fastening methods for their connection structure. The technical principle is that the helical engagement of the threads or the tightening force of the bolts and nuts tightly press the upper cover and lower shell of the junction box together, and the elastic deformation of the sealing gasket fills the gaps, thus achieving waterproofing. During assembly, tools such as wrenches and screwdrivers are needed to tighten the threads or bolts, and precise torque control ensures even distribution of sealing pressure.

[0004] Existing waterproof junction box threaded connections and bolt fastening methods are prone to sealing failure under long-term vibration environments due to resonance or loosening of the threads or bolts. For example, junction boxes installed inside wind turbine towers are affected by continuous wind turbine vibration, causing the threaded connections to gradually loosen, the pressure of the sealing gaskets to drop, and moisture to seep in, leading to electrical faults. In addition, the thread and bolt fastening process relies on specialized tools, and the installation steps are cumbersome, resulting in low construction efficiency. Especially in large-scale wiring projects, a lot of manpower and time costs are required, making it difficult to meet the needs of rapid assembly in modern engineering. Therefore, a snap-fit ​​integrated compression waterproof junction box is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a snap-fit ​​integrated extrusion waterproof junction box, which aims to improve the problem that the existing waterproof junction box with threaded connection and bolt fastening requires additional tools during disassembly and assembly, resulting in low installation efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A snap-fit ​​integrated extrusion waterproof junction box includes an upper cover, a lower shell on the lower surface of the upper cover, a sealing ring inside the upper cover, a cable holder fixedly connected inside the lower shell, a fixing component inside the upper cover, and a sealing component inside the upper cover.

[0008] The fixing component includes a plastic buckle, the sidewall of which is fixedly connected to the sidewall of the upper cover, the sidewall of the lower shell has a slot, a reinforcing post is fixedly connected inside the upper cover, and a sleeve is fixedly connected inside the lower shell. The sidewall of the plastic buckle is slidably connected inside the slot, and the sidewall of the reinforcing post is slidably connected inside the sleeve.

[0009] As a further description of the above technical solution:

[0010] The sealing assembly includes an upper pressure plate, the sidewall of which is slidably connected inside the upper cover.

[0011] As a further description of the above technical solution:

[0012] The plastic buckle is in the shape of barbed teeth and cooperates with the slot to achieve a tight connection.

[0013] As a further description of the above technical solution:

[0014] A fixing seat is fixedly connected inside the upper cover, and a spring is fixedly connected to the side wall of the fixing seat.

[0015] As a further description of the above technical solution:

[0016] One end of the spring is fixedly connected to the side wall of the upper pressure plate, and a flexible sealing strip is fixedly connected to the other side of the upper pressure plate.

[0017] As a further description of the above technical solution:

[0018] A lower pressure plate is fixedly connected inside the lower shell, and the sidewall of the flexible sealing strip is attached to the upper surface of the lower pressure plate.

[0019] As a further description of the above technical solution:

[0020] The flexible sealing strip is made of silicone rubber and is used to compensate for sealing gaps by cooperating with a spring.

[0021] As a further description of the above technical solution:

[0022] The inner cavity of the lower shell is sealed by an adhesive layer, which is used to fill the inner cavity of the junction box and the gaps between cables, eliminating the path of water seepage.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the plastic buckle and the slot cooperate, and the inclined surface of the barbed teeth guides the buckle to slide smoothly into the slot, forming an interference fit. This ensures that the junction box does not loosen under vibration. At the same time, it strengthens the sliding fit between the column and the sleeve, which plays a pre-positioning role during the insertion process, reduces the misalignment gap of the side wall, and disperses the force on the buckle to avoid local stress concentration. This solves the problem that some waterproof junction boxes with threaded connections and bolt fastening methods are prone to loosening due to long-term vibration, and that additional tools are required for installation during disassembly and assembly, resulting in low installation efficiency. The above structure improves the installation efficiency of the equipment.

[0025] 2. In this invention, the inner cavity of the lower shell is filled with a two-component epoxy resin adhesive, which, after curing, forms a rigid-elastic composite structure to suppress fretting wear of internal components. Simultaneously, the adhesive layer completely encapsulates the cables and terminals, eliminating water seepage paths. The fixing seat inside the upper cover is connected to the upper pressure plate via a spring. When the latch is locked, the upper pressure plate, under the spring force, pushes the flexible sealing strip to tightly adhere to the lower pressure plate, forming a secondary seal and further improving the sealing effect. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the snap-fit ​​integrated extrusion waterproof junction box proposed in this utility model;

[0027] Figure 2 This is a split-out structural diagram of the snap-fit ​​integrated extrusion waterproof junction box proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the top cover of the snap-fit ​​integrated extrusion waterproof junction box proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the lower shell of the snap-fit ​​integrated extrusion waterproof junction box proposed in this utility model;

[0030] Figure 5 This is a schematic diagram of the internal structure of the top cover of the snap-fit ​​integrated extrusion waterproof junction box proposed in this utility model;

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0032] Legend:

[0033] 1. Top cover; 2. Bottom shell; 3. Sealing ring; 4. Plastic buckle; 5. Slot; 6. Reinforcing post; 7. Insert sleeve; 8. Cable holder; 9. Fixing base; 10. Spring; 11. Upper pressure plate; 12. Flexible sealing strip; 13. Lower pressure plate. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figures 1-4 This utility model provides an embodiment of a snap-fit ​​integrated extrusion waterproof junction box, including an upper cover 1, which is used to close the top opening of the junction box and protect the internal electrical components. A lower shell 2 is provided on the lower surface of the upper cover 1, which cooperates with the upper cover 1 to form a closed inner cavity. A sealing ring 3 is provided inside the upper cover 1. The sealing ring 3 is made of rubber and is used to generate sealing pressure by utilizing the elastic deformation of rubber to achieve the effect of waterproofing and dustproofing. A cable holder 8 is fixedly connected inside the lower shell 2. The cable holder 8 is used to fix and support the cable, so that the cable remains stable inside the junction box. A fixing component is provided inside the upper cover 1 to achieve a firm connection between the upper cover 1 and the lower shell 2. A sealing component is provided inside the upper cover 1 to further enhance the sealing performance of the junction box.

[0036] The fixing assembly includes a plastic clip 4, whose sidewall is fixedly connected to the sidewall of the upper cover 1. A slot 5 is provided on the sidewall of the lower shell 2, which engages with the plastic clip 4, providing space for the clip to embed. The sidewall of the plastic clip 4 is slidably connected inside the slot 5. The plastic clip 4 and the slot 5 engage in a sliding snap-fit ​​motion, achieving rapid assembly and a tight connection, effectively resisting loosening caused by external pulling and vibration. A reinforcing post 6 is fixedly connected inside the upper cover 1, reducing the misalignment gap between the sidewalls when the upper cover 1 and the lower shell 2 are inserted. A sleeve 7 is fixedly connected inside the lower shell 2. The insert 7 is used to cooperate with the reinforcing post 6 to guide the upper cover 1 to be accurately inserted into the lower shell 2. The side wall of the reinforcing post 6 is slidably connected inside the insert 7. The reinforcing post 6 cooperates with the insert 7 to perform sliding guide movement, which achieves the effects of improving assembly accuracy, dispersing the force on the buckle, and avoiding local stress concentration, thereby enhancing the overall structural stability of the junction box. The plastic buckle 4 is in the shape of barbed teeth and cooperates with the slot 5 to achieve a tight connection. The inclined surface of the barbed teeth is used to guide the plastic buckle 4 to slide smoothly into the slot 5, while the vertical surface prevents the buckle from falling out in the opposite direction. The two cooperate to form an interference fit to ensure that the junction box does not loosen under vibration.

[0037] Reference Figure 4 , Figure 5 and Figure 6The sealing assembly includes an upper pressure plate 11, whose sidewall is slidably connected to the inside of the upper cover 1. A fixing seat 9 is fixedly connected inside the upper cover 1, and a spring 10 is fixedly connected to the sidewall of the fixing seat 9. The spring 10 generates a continuous preload. One end of the spring 10 is fixedly connected to the sidewall of the upper pressure plate 11. The spring 10, in conjunction with the upper pressure plate 11, performs elastic expansion and contraction, achieving automatic pressure compensation based on changes in the sealing gap. A flexible sealing strip 12 is fixedly connected to the other side of the upper pressure plate 11. The flexible sealing strip 12 fills micro-gaps to achieve a sealing function. A lower pressure plate 13 is fixedly connected inside the lower shell 2. The lower pressure plate 13 provides a support surface for the flexible sealing strip 12, allowing it to deform evenly under stress. The sidewall of the flexible sealing strip 12 adheres to the upper surface of the lower pressure plate 13. The lower pressure plate 13, in conjunction with the compression deformation motion, achieves a tight fit and prevents moisture intrusion. The flexible sealing strip 12, made of silicone rubber, is used to compensate for the sealing gap by cooperating with the spring 10. Silicone rubber has good weather resistance, elasticity, and waterproofness, and can maintain sealing performance in different environments. The inner cavity of the lower shell 2 is sealed by a potting layer. The potting layer is composed of two-component epoxy resin and other sealing materials, which is used to fill the inner cavity of the junction box and the gap between the cables, eliminating the seepage path and preventing moisture from penetrating from the cable interface and the inside of the box. The dynamic sealing structure composed of the spring 10, the upper pressure plate 11, the flexible sealing strip 12, and the lower pressure plate 13, combined with the static sealing of the potting layer, forms a rigid-flexible dual sealing system, which significantly improves the waterproof performance of the junction box under complex working conditions such as vibration and temperature changes.

[0038] Working principle: During installation, the plastic clip 4 is first engaged with the slot 5 of the lower shell 2. The inclined surface of the barbed teeth guides the clip to slide smoothly into the slot 5, while the vertical surface prevents the clip from coming out backward, forming an interference fit to ensure that the junction box does not loosen under vibration. During the insertion process between the reinforcing post 6 of the upper cover 1 and the lower shell 2, the reinforcing post 6 first enters the insertion sleeve 7, which plays a pre-positioning role, reduces the misalignment gap of the side walls, and disperses the force on the clip to avoid local stress concentration. The fixing seat 9 inside the upper cover 1 is connected to the upper pressure plate 11 through the spring 10. When the plastic clip... When the buckle 4 is locked, the upper pressure plate 11, under the action of the spring 10, pushes the flexible sealing strip 12 to fit tightly against the lower pressure plate 13, forming a secondary seal. The flexible sealing strip 12, made of silicone rubber, undergoes compression deformation under the pressure of the spring 10, filling micro-irregularities such as machining marks and compensating for the thermal expansion and contraction of the shell caused by temperature changes. The inner cavity of the lower shell 2 is filled with two-component epoxy resin, which forms a rigid-elastic composite structure after curing. It can absorb the vibration energy of the cable and suppress the fretting wear of internal components. At the same time, the potting layer completely wraps the cable and the terminal block, eliminating the water seepage path.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A snap-fit ​​integrated extrusion waterproof junction box, including a top cover (1), characterized in that: The lower surface of the upper cover (1) is provided with a lower shell (2), the upper cover (1) is provided with a sealing ring (3), the lower shell (2) is fixedly connected with a cable seat (8), the upper cover (1) is provided with a fixing component, and the upper cover (1) is provided with a sealing component. The fixing component includes a plastic buckle (4), the side wall of which is fixedly connected to the side wall of the upper cover (1), the side wall of the lower shell (2) is provided with a slot (5), a reinforcing post (6) is fixedly connected inside the upper cover (1), and a sleeve (7) is fixedly connected inside the lower shell (2). The side wall of the plastic buckle (4) is slidably connected inside the slot (5), and the side wall of the reinforcing post (6) is slidably connected inside the sleeve (7).

2. The snap-together integral extruded waterproof junction box of claim 1, wherein: The sealing assembly includes an upper pressure plate (11), the sidewall of which is slidably connected inside the upper cover (1).

3. The snap-together integral extruded waterproof junction box of claim 1 wherein: The plastic buckle (4) is in the shape of barbed teeth and cooperates with the slot (5) to achieve a tight connection.

4. The snap-together integral extruded waterproof junction box of claim 2, wherein: The upper cover (1) is fixedly connected to a fixing seat (9), and a spring (10) is fixedly connected to the side wall of the fixing seat (9).

5. The snap-together integral extruded waterproof junction box of claim 4 wherein: One end of the spring (10) is fixedly connected to the side wall of the upper pressure plate (11), and a flexible sealing strip (12) is fixedly connected to the other side of the upper pressure plate (11).

6. The snap-together integral extruded waterproof junction box of claim 5 wherein: The lower shell (2) is fixedly connected to a lower pressure plate (13), and the sidewall of the flexible sealing strip (12) is attached to the upper surface of the lower pressure plate (13).

7. The snap-together integral extruded waterproof junction box of claim 6 wherein: The flexible sealing strip (12) is made of silicone rubber and is used to compensate for the sealing gap by cooperating with the spring (10).

8. The snap-together integral extruded waterproof junction box of claim 1 wherein: The inner cavity of the lower shell (2) is sealed by an adhesive layer to fill the inner cavity of the junction box and the gap between the cables, thereby eliminating the path of water seepage.

Images