A combined junction box for electricity metering

Abstract

This utility model discloses a combined junction box for electricity metering, including a box body, a wiring assembly, and a cover plate. The box body has an inner cavity with an upper opening, the wiring assembly is installed in the inner cavity, and the cover plate covers the upper part of the inner cavity. The wiring assembly includes a conductive plate positioned in the inner cavity, a terminal that can move up and down relative to the conductive plate, and a wiring screw screwed to the terminal. A wiring space is formed between the conductive plate and the terminal. Tightening the wiring screw causes the terminal to move up and down, thereby expanding and shrinking the wiring space. The cover plate has a wiring operation hole at a position corresponding to the upper end of the wiring screw. The combined junction box for electricity metering in this utility model has a reasonable structure, will not damage the connected wires during wiring, and also helps to reduce the production cost of the wiring assembly, making it highly practical.

Description

Technical Field

[0001] This utility model belongs to the field of wiring, specifically relating to a combined junction box for electricity metering. Background Technology

[0002] The function of the combined junction box for electricity metering is to connect the secondary wires from the current transformer in series and parallel through the terminals of the junction box, and finally connect them to the terminals of the electricity meter. This wiring method is suitable for single-phase lighting and three-phase active and reactive energy metering under various voltage levels. Patent document CN211505654U discloses a combined junction box for electricity metering. The structure in this patent document has the following disadvantages: When wiring, the end of the wire is inserted into wire hole one / wire hole two, and then the locking screw one 9 / locking screw two 10 on it moves up and down relative to wire post one and wire post two, respectively, thereby pressing the wire with locking screw one / locking screw two. However, during the tightening of locking screw one / locking screw two, torque is applied to the wire, which can easily damage the wire; in addition, wire post one and wire post two are solid cylinders with holes drilled in them, which results in high material costs. Utility Model Content

[0003] The purpose of this utility model is to provide a combined junction box for electricity metering, which can reduce damage to the connected wires during wiring and also helps to reduce production costs.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This utility model provides an electrical energy metering junction box, including a box body, a wiring assembly, and a cover plate; the box body has an inner cavity with an upper opening, the wiring assembly is installed in the inner cavity, and the cover plate covers the upper part of the inner cavity; the wiring assembly includes a conductive plate positioned in the inner cavity, a terminal that can move up and down relative to the conductive plate, and a wiring screw screwed to the terminal, forming a wiring space between the conductive plate and the terminal, and turning the wiring screw causes the terminal to move up and down, so as to expand and shrink the wiring space; the cover plate is provided with a wiring operation hole at a position corresponding to the upper end of the wiring screw.

[0006] In some embodiments, the terminal is a rectangular frame structure that is sleeved on the conductive sheet, and the upper end of the terminal is provided with a threaded hole that mates with a wiring screw.

[0007] In some embodiments, the rectangular frame structure is formed by bending a metal plate multiple times.

[0008] In some embodiments, the inner cavity is divided by a partition to form a plurality of limiting grooves, and a plurality of wiring assemblies are correspondingly installed in the limiting grooves.

[0009] In some embodiments, a pressure plate is installed on the upper part of the inner cavity and on the lower side of the cover plate. The pressure plate is provided with a through hole for the wiring screw to pass through. The upper end of the wiring screw is limited between the pressure plate and the cover plate to restrict the vertical movement of the wiring screw.

[0010] In some embodiments, a limiting boss is provided on the outer periphery of the upper end, and an annular limiting groove is formed between the cover plate and the pressure plate, with the limiting boss located within the annular limiting groove.

[0011] In some embodiments, the inner cavity is provided with a support step, the lower side of the pressure plate abuts against the support step, and the upper part of the pressure plate abuts against the lower part of the cover plate.

[0012] In some embodiments, the cover plate and the box body are fixedly connected by screws, clips or welding.

[0013] In some embodiments, the conductive sheet is integrally provided with a contact portion, and the cover plate is provided with a cutout portion at a position corresponding to the contact portion. The contact portion extends into the cutout portion and is exposed on the surface of the cover plate. A movable connecting piece is provided on the upper side of the cover plate between the contact portions of the two conductive sheets. The movable connecting piece is fixedly connected to the contact portion by a connecting bolt. The upper surface of the contact portion is in contact with the lower surface of the movable connecting piece.

[0014] In some embodiments, the upper part of the cover plate is provided with a limiting groove, and the movable connecting piece is movably disposed in the limiting groove.

[0015] In some embodiments, an upwardly protruding block is provided in the inner cavity at a position corresponding to the electrical contact part, and a nut that mates with the connecting bolt is installed between the upper end of the protruding block and the electrical contact part.

[0016] The advantages of this invention are as follows: By optimizing the structure, during wiring, a tool (such as a screwdriver) is inserted into the wiring operation hole and connected to the upper end of the wiring screw. By turning the wiring screw, the terminal can be moved up and down, thereby controlling the expansion and contraction of the wiring space. When the wiring space contracts, the inserted wire can be pressed tightly; when the wiring space expands, the wire can be removed. This wire pressing method will not damage the wire. Moreover, compared to using solid cylinders to process wire posts, this embodiment uses conductive sheets, which requires less material and helps reduce production costs. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art are briefly introduced below. In the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a perspective view of the combined junction box for electricity metering in this utility model;

[0019] Figure 2 for Figure 1 An exploded view of the power metering junction box shown.

[0020] Figure 3 for Figure 1 A cross-sectional view of the power metering junction box shown.

[0021] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the structure of the two conductive sheets, the movable connecting sheet and the connecting bolt in this utility model.

[0023] Figure 6 This is a structural diagram showing the disassembled components of the two conductive sheets, the movable connecting sheet, and the connecting bolts in this utility model.

[0024] Figure 7 This is a schematic diagram of the structure of a wiring assembly in this utility model.

[0025] The reference numerals in the figure are as follows: 1. Box body; 11. Inner cavity; 12. Partition; 13. Support step; 14. Protrusion; 2. Wiring assembly; 21. Conductive sheet; 211. Connecting part; 22. Terminal; 23. Wiring screw; 231. Upper end; 232. Limiting boss; 3. Cover plate; 31. Wiring operation hole; 32. Hollowed-out part; 33. Limiting groove; 4. Pressure plate; 41. Through hole; 5. Annular limiting groove; 6. Movable connecting piece; 61. Connecting bolt; 62. Nut. Detailed Implementation

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0028] The structure of the power metering junction box in this embodiment of the utility model is as follows: Figures 1 to 7As shown, it includes a housing 1, a wiring assembly 2, and a cover plate 3. The housing 1 has an inner cavity 11 with an upper opening. The wiring assembly 2 is installed in the inner cavity 11, and the cover plate 3 covers the upper part of the inner cavity 11. The wiring assembly 2 is used to connect wires. The wiring assembly 2 includes a conductive plate 21 positioned in the inner cavity 11, a terminal 22 that can move up and down relative to the conductive plate 21, and a wiring screw 23 screwed to the terminal 22. A wiring space is formed between the conductive plate 21 and the terminal 22. Tightening the wiring screw 23 causes the terminal 22 to move up and down, thereby expanding and shrinking the wiring space. The cover plate 3 has an upper end 231 that aligns with the wiring screw 23. A wiring operation hole 31 is provided at the appropriate location. In this embodiment, the structure of the wiring assembly 2 is optimized. When wiring, a tool (such as a screwdriver) is inserted into the wiring operation hole 31 and connected to the upper end 231 of the wiring screw 23. Then, by turning the wiring screw 23, the terminal 22 can be moved up and down, thereby controlling the expansion and contraction of the wiring space. When the wiring space is contracted, the inserted wire can be pressed tightly. When the wiring space is expanded, the wire can be removed. This wire pressing method will not damage the wire. Moreover, compared with the method of processing the wire post using a solid column, this embodiment uses a conductive sheet 21, which requires less material and helps to reduce production costs.

[0029] Combination Figure 3 , Figure 4 and Figure 7 As shown, to improve the reliability of the wiring, the terminal 22 is further configured as a rectangular frame structure, which is sleeved on the conductive sheet 21. The upper end of the terminal 22 is provided with a threaded hole that mates with the wiring screw 23. This creates a wiring space inside the rectangular frame structure, which can better limit the wire and thus help to enhance the wiring effect. In actual operation, the terminal 22 can also be configured with other structures to achieve a wire clamping effect. Preferably, the rectangular frame structure is formed by bending a metal plate multiple times. This manufacturing process generates less waste and helps to reduce production costs.

[0030] To better accommodate the installation of multiple wiring components 2, multiple limiting grooves are formed in the inner cavity 11 by partitions 12, thereby reasonably placing multiple wiring components 2 in the corresponding limiting grooves.

[0031] See Figures 2 to 4As shown, a pressure plate 4 is installed on the upper part of the inner cavity 11 and limited on the lower side of the cover plate 3. The pressure plate 4 is provided with a through hole 41 for the wiring screw 23 to pass through. The pressure plate 4 and the cover plate 3 cooperate to limit the upper end 231 of the wiring screw 23, so as to restrict the wiring screw 23 to be located between the pressure plate 4 and the cover plate 3, thereby restricting the wiring screw 23 from moving up and down. Since the combination of the pressure plate 4 and the cover plate 3 restricts the degree of freedom of the wiring screw 23, the wiring screw 23 can only rotate and cannot move up and down. This structural design optimizes the wiring process, makes operation convenient, and reduces problems such as poor connection caused by the movement of the wiring screw 23.

[0032] More specifically, such as Figure 4 As shown, a limiting boss 232 is provided on the outer periphery of the upper end 231. The presence of the limiting boss 232 can increase the outer diameter of the upper end 231. An annular limiting groove 5 is formed between the cover plate 3 and the pressure plate 4. The limiting boss 232 is limited within the annular limiting groove 5, which can effectively limit the wiring screw 23.

[0033] In order to quickly and effectively limit the pressure plate 13, a support step 13 is provided in the inner cavity 11. The lower part of the pressure plate 4 abuts against the support step 13, and the upper part of the pressure plate 4 abuts against the lower part of the cover plate 3. Through the cooperation of the support step 13 and the cover plate 3, the pressure plate 4 is blocked from the upper and lower sides, thereby providing a stable and efficient limiting support for the pressure plate 4.

[0034] Optionally, the cover plate 3 and the box body 1 can be fixedly connected by screws, by snap-fit, or by welding (such as ultrasonic welding).

[0035] like Figures 1 to 6 As shown, in order to enable flexible connection and disconnection between different wiring components 2 in actual use, the conductive sheet 21 is integrally provided with a contact part 211, and the cover plate 3 is provided with a hollow part 32 corresponding to the contact part 211. The presence of the hollow part 32 allows the contact part 211 to be exposed from the cover plate 3. Specifically, the contact part 211 extends into the hollow part 32 and is exposed on the surface of the cover plate 3. A movable connecting piece 6 is provided on the upper side of the cover plate 3 between the contact parts 211 of the two conductive sheets 21. The movable connecting piece 6 is fixedly connected to the contact part 211 by a connecting bolt 61. The upper surface of the contact part 211 is in contact with the lower surface of the movable connecting piece 6. When the movable connecting piece 6 is in contact with the contact parts 211 of the two conductive sheets 21 at the same time, the two conductive sheets 21 are connected. When the connecting bolt 61 is loosened, the movable connecting piece 6 moves to a position where it is not in contact with the contact parts 211 of the two conductive sheets 21 at the same time, thus disconnecting the electrical connection.

[0036] In order to limit the movement of the movable connecting piece 6, a limiting groove 33 is provided on the upper part of the cover plate 3. The movable connecting piece 6 is movably disposed in the limiting groove 33, and the limiting groove 33 allows the movable connecting piece 6 to move in a specific direction.

[0037] like Figure 4 As shown, in some embodiments, an upwardly protruding block 14 is provided in the inner cavity 11 at a position corresponding to the power receiving part 211. The protruding block 14 can provide support for the power receiving part 211, and a nut 62 can be installed between the upper end of the protruding block 14 and the power receiving part 211. By setting the nut 62 and the connecting bolt 61, it is easier to tighten the connecting bolt 61. As a preferred embodiment, a groove can be provided on the protruding block 14 to embed the nut 62 into the groove to ensure the reliability of the nut installation.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A combined junction box for electricity metering, comprising a box body (1), a wiring assembly (2), and a cover plate (3); the box body (1) has an inner cavity (11) with an upper opening, the wiring assembly (2) is installed in the inner cavity (11), and the cover plate (3) covers the upper part of the inner cavity (11); characterized in that, The wiring assembly (2) includes a conductive sheet (21) positioned in the inner cavity (11), a terminal (22) that can move up and down relative to the conductive sheet (21), and a wiring screw (23) screwed to the terminal (22). A wiring space is formed between the conductive sheet (21) and the terminal (22). Tightening the wiring screw (23) causes the terminal (22) to move up and down, so that the wiring space expands and shrinks. The cover plate (3) is provided with a wiring operation hole (31) at a position corresponding to the upper end (231) of the wiring screw (23).

2. The combined junction box for electricity metering according to claim 1, characterized in that, The terminal (22) is a rectangular frame structure, which is sleeved on the conductive sheet (21). The upper end of the terminal (22) is provided with a threaded hole that cooperates with the wiring screw (23).

3. The combined junction box for electricity metering according to claim 2, characterized in that, The rectangular frame structure is formed by bending a metal plate multiple times.

4. The combined junction box for electricity metering according to claim 1, characterized in that, The inner cavity (11) is divided by a partition (12) to form multiple limiting grooves, and multiple wiring components (2) are installed in the limiting grooves respectively.

5. The combined junction box for electricity metering according to claim 1, characterized in that, A pressure plate (4) is installed on the upper part of the inner cavity (11) and on the lower side of the cover plate (3). The pressure plate (4) has a through hole (41) for the wiring screw (23) to pass through. The upper end (231) of the wiring screw (23) is limited between the pressure plate (4) and the cover plate (3) to restrict the wiring screw (23) from moving up and down.

6. The combined junction box for electricity metering according to claim 5, characterized in that, The upper end (231) is provided with a limiting boss (232) on its outer periphery, and an annular limiting groove (5) is formed between the cover plate (3) and the pressure plate (4), and the limiting boss (232) is limited to the annular limiting groove (5).

7. The combined junction box for electricity metering according to claim 5, characterized in that, The inner cavity (11) is provided with a support step (13), the lower side of the pressure plate (4) abuts against the support step (13), and the upper part of the pressure plate (4) abuts against the lower part of the cover plate (3).

8. The combined junction box for electricity metering according to claim 1, characterized in that, The cover plate (3) and the box body (1) are fixedly connected by screws, snap-fit ​​or welding.

9. The combined junction box for electricity metering according to claim 1, characterized in that, The conductive sheet (21) is integrally provided with a contact part (211), and the cover plate (3) is provided with a hollow part (32) at the position corresponding to the contact part (211). The contact part (211) extends into the hollow part (32) and is exposed on the surface of the cover plate (3). A movable connecting piece (6) is provided on the upper side of the cover plate (3) between the contact parts (211) of the two conductive sheets (21). The movable connecting piece (6) is fixedly connected to the contact part (211) by a connecting bolt (61). The upper surface of the contact part (211) is in contact with the lower surface of the movable connecting piece (6).

10. The combined junction box for electricity metering according to claim 9, characterized in that, The inner cavity (11) is provided with an upward protrusion block (14) corresponding to the position of the power receiving part (211), and a nut (62) that cooperates with the connecting bolt (61) is installed between the upper end of the protrusion block (14) and the power receiving part (211).

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