A three-phase terminal box with stepped layers
By designing a stepped, layered slot platform in the three-phase junction box, the wiring slots are distributed in layers inside and outside the box, solving the problems of messy wiring and complex structure in the junction box, achieving efficient wiring and maintenance, and reducing production costs and structural instability risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CONNECTION ELECTRONIC CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-17
AI Technical Summary
The centralized layout of terminals in existing three-phase junction boxes leads to messy wiring and inconvenient maintenance. Furthermore, the need for additional independent junction boxes increases production costs and the risk of structural loosening.
Design a stepped, layered three-phase junction box. By integrally forming a slot platform with a three-step structure at one end of the box, the input and output wiring slots of the three-phase power are distributed in layers in the inner and outer spaces of the box, eliminating the need for additional independent wiring platforms. The connecting partitions form a stable wiring path and isolation structure.
It achieves a clear and standardized wiring path, reduces wiring error rate and maintenance difficulty, reduces the number of parts and assembly steps, enhances the integrity and reliability of the wiring mechanism, and avoids problems such as wire tangling and loose connections.
Smart Images
Figure CN224520599U_ABST
Abstract
Claims
1. A stepped tiered three-phase terminal block comprising a block body and a cover, characterized in that, One end of the box body is integrally formed with a slot platform with a three-level stepped structure, and the slot platform divides the box body into two spaces, an inner space and an outer space. The input wiring slots for three-phase electricity are located on the stepped surface of the slot platform facing the inside of the box, and the output wiring slots for three-phase electricity are located on the stepped surface of the slot platform facing the outside of the box; and the slot platform with the three-step structure has a height gap between two adjacent steps for the passage of guide strips.
2. The stepped tiered three-phase junction box of claim 1, wherein, The input wiring slots for the three-phase electricity include a live wire input slot, a neutral wire input slot, and a ground wire input slot; the output wiring slots for the three-phase electricity include a live wire output slot, a neutral wire output slot, and a ground wire output slot. From the outside to the inside of the box, the slot platform with the three-stage stepped structure includes a first wiring platform, a second wiring platform, and a third wiring platform gap in sequence. The first terminal block has three live wire input slots on its inner side facing the box; the second terminal block has three live wire output slots on its outer side facing the box, each corresponding to one of the live wire input slots; the second terminal block also has a neutral wire input slot and a ground wire input slot on its inner side facing the box; the third terminal block has a neutral wire output slot and a ground wire output slot on its outer side facing the box, each corresponding to one of the neutral wire input slots and the other to one of the ground wire input slots.
3. The stepped tiered three-phase junction box of claim 2, wherein, The three live wire output slots of the second terminal block are distributed non-overlapping with the neutral wire input slot and the ground wire input slot on the other side in the horizontal projection plane; the three live wire output slots are located at the end of the second terminal block closer to the first terminal block, and the neutral wire input slot and the ground wire input slot are located at the end of the second terminal block closer to the third terminal block.
4. The stepped tiered three-phase terminal block of claim 2 or 3, wherein, The three live wire output slots on the outer side of the second terminal block are spaced apart from the neutral wire input slot and the ground wire input slot on the inner side, and the neutral wire input slot and the ground wire input slot correspond to the space between two adjacent live wire output slots.
5. The stepped tiered three-phase junction box of claim 2, wherein, The box body includes two long side plates, a slot platform located between the two long side plates, a short side plate, and a bottom plate; The base plate, the slot platform, the short side plate, and the two long side plates enclose the internal space of the box, and the three live wire input slots, neutral wire input slots, and ground wire input slots are located inside the box. The back of the slot platform and the long side plates on both sides form an open external slot for the box body, and the three live wire output slots, the neutral wire output slots and the ground wire output slots are located in the external slot for the box body.
6. The stepped tiered three-phase junction box of claim 5, wherein, The first terminal block is connected to the end of the base plate away from the short side plate. A first connecting partition is provided between two adjacent live wire input slots. The second terminal block is connected to the diagonal end of the first connecting partition away from the first terminal block. A second connecting partition is provided between the neutral wire input slot and the ground wire input slot. The third terminal block is connected to the diagonal end of the second connecting partition away from the second terminal block. The first connecting partition is used to connect the first terminal block and the second terminal block, and is also used to simultaneously separate two adjacent live wire input slots and two adjacent live wire output slots; the second connecting partition is used to connect the second terminal block and the third terminal block, and is also used to simultaneously separate the neutral wire input slot and the ground wire input slot, and separate the neutral wire output slot and the ground wire output slot.
7. The stepped, layered three-phase junction box according to claim 6, characterized in that, The second terminal block has a side connecting plate on the outside of the neutral input slot and the outside of the ground input slot, respectively. The two side connecting plates extend and connect to the outside of the neutral output slot and the outside of the ground output slot of the third terminal block.
8. The stepped, layered three-phase junction box according to claim 5, characterized in that, The box body is provided with two cable outlet holes, including a first cable outlet hole located on the short side plate and a second cable outlet hole located on the bottom plate. Both cable outlet holes are provided with easily removable pre-cut plates.
9. The stepped tiered three-phase junction box of claim 5, wherein, The outer side of the box is provided with several elastic limiting protrusions, and the box is embedded into the external chassis through the elastic limiting protrusions.
10. The stepped tiered three-phase junction box of claim 1, wherein, The two ends of the cover are detachably hinged to the two ends of the box body. The end of the box body is provided with an open shaft groove, and the end of the cover body is provided with a rotating shaft. The rotating shaft is detachably connected to the shaft groove and can rotate within the shaft groove.