Wiring structure and junction box of electric energy meter

Abstract

The utility model relates to the technical field of electric energy meters, in particular to a wiring structure and a wiring box of an electric energy meter, the wiring structure comprises a wiring sheet, a wiring frame and a bolt, the wiring frame is a frame body with an inner hole, the inner hole of the wiring frame penetrates through two opposite surfaces of the wiring frame, the end part of the wiring sheet is embedded in the inner hole of the wiring frame, and the bolt is arranged in the wiring frame. A fixing hole communicated with an inner cavity of the wiring frame is formed in the surface of the wiring frame, the bolt is connected into the fixing hole in a threaded mode, and the wiring sheet is used for being electrically connected with a wire. Through the split design of the lug plate and the wiring frame, the processing is fast, the waste material is less, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of electricity meters, and more particularly to a wiring structure and junction box for an electricity meter. Background Technology

[0002] An electricity meter is an instrument used to measure the amount of electrical energy consumed in a circuit. It is widely used in industrial, commercial, and large residential applications where high-power electricity is required. An electricity meter includes a wiring structure that supplies power to the sensing element within the meter.

[0003] In the prior art, referring to Figure 1 The junction box of the electricity meter has a mounting hole 1. The wiring structure of the electricity meter includes a terminal block 8 and a bolt 5. The terminal block 8 is fixedly installed in the mounting hole 1. The terminal block 8 has two wiring holes 81 and one connection hole 82.

[0004] Both wiring holes 81 are used for connecting wires, and include a first wiring hole 811 and a second wiring hole 812. The first wiring hole 811 is formed through the end of the terminal 8 and extends along the thickness direction of the terminal 8. The wall of the first wiring hole 811 is provided with internal threads. The second wiring hole 812 is formed on the end wall of the other end of the terminal 8 and extends along the length direction of the terminal 8. To meet the dimensional requirements for forming the second wiring hole 812, the terminal 8 needs to be wide and thick enough.

[0005] The connecting hole 82 communicates with the second wiring hole 812. The wall of the connecting hole 82 is provided with internal threads. The connecting hole 82 is used for the bolt 5 to pass through to fix the wire extending into the second wiring hole 812 to the terminal 8. However, in order to meet actual wiring requirements, the depth of the first wiring hole 811 should not be too large. Therefore, a notch 83 needs to be milled at the end of the terminal 8 where the first wiring hole 811 is located to reduce the depth of the first wiring hole 811.

[0006] Based on the above structure, the actual processing flow of terminal 8 includes first punching the blank, then milling the blank to form notch 83, three drillings, and two tappings. This processing technology has a high cost, especially since the milling process also requires matching tooling, and the efficiency is relatively low. Utility Model Content

[0007] To reduce the processing cost of the wiring structure, this application provides a wiring structure and junction box for an electricity meter.

[0008] This application provides a wiring structure and junction box for an electricity meter, which adopts the following technical solution:

[0009] A wiring structure for an electricity meter includes a connector, a frame, and a bolt. The frame is a frame with an inner hole that extends through two opposing surfaces. The end of the connector is embedded in the inner hole of the frame. A fixing hole communicating with the inner cavity of the frame is formed on the surface of the frame. The bolt is threaded into the fixing hole. The connector is used for electrical connection with a wire.

[0010] By adopting the above technical solution, the terminal block and the terminal frame are designed separately. The terminal block can be made thinner, saving processing materials and simplifying the complex structure of traditional integrated terminal blocks. The terminal block can be processed by only one step of stamping, drilling and tapping, reducing the processing steps of milling notches, making processing faster and producing less waste, thus reducing production costs. The terminal frame can be made by only drawing, which is fast and low-cost. The terminal block and the terminal frame are quickly installed through embedded interference fit, improving the reliability of electrical connection.

[0011] Optionally, the connector includes a body and an insertion portion for inserting into an inner hole of the connector frame, wherein the width of the insertion portion is smaller than the width of the body.

[0012] By adopting the above technical solution, the connector is divided into a wider body and a narrower insertion part. The body provides a larger contact area to ensure conductivity, while the narrow insertion part facilitates precise insertion into the inner hole of the connector frame, reduces installation resistance, improves operational convenience, and can also reduce the width of the connector frame, saving processing materials.

[0013] Optionally, guide slopes are formed on both back sidewalls of the end of the main body near the insertion part, and the distance between the two guide slopes decreases along the direction of the insertion part into the inner hole of the wiring frame.

[0014] By adopting the above technical solution, the design of the guiding slope makes the end of the insertion part away from the main body gradually narrow, forming a natural guiding effect, reducing the frictional resistance when the insertion part is inserted into the inner hole of the wiring frame, improving the smoothness of operation, and reducing the risk of structural deformation caused by forced insertion.

[0015] Optionally, the insertion part has multiple anti-slip grooves, and each anti-slip groove is arranged along the direction in which the connector is inserted into the inner hole of the connector frame.

[0016] By adopting the above technical solution, the anti-slip groove increases the friction between the insertion part and the inner wall of the wiring frame or the bolt head, effectively preventing the wiring piece from accidentally slipping out of the inner hole of the wiring frame, ensuring the long-term stability of the electrical connection, and is especially suitable for high vibration environments.

[0017] Optionally, the connector further includes a welding end located on the end of the body portion away from the insertion portion, the welding end being used for welding with a wire.

[0018] By adopting the above technical solution, the welding end setting allows the terminal block to be directly welded to the wire, providing a more robust electrical connection for high current scenarios, while reducing contact resistance and improving the working efficiency of the electricity meter.

[0019] Optionally, it also includes a calibration plate with a through hole for a bolt to pass through.

[0020] By adopting the above technical solution, the calibration plate is connected to the wires during calibration. Through holes are opened on the calibration plate for bolts to pass through. The calibration plate is fixed to the wiring frame by bolts, eliminating the need for an additional fixing structure for the calibration plate, simplifying the structure and reducing costs.

[0021] A junction box includes a junction box body and the aforementioned wiring structure mounted on the junction box body.

[0022] By adopting the above technical solution, and by designing the terminal block and the terminal frame separately and matching them with mounting holes and receiving slots, the terminal block can be made thinner, saving processing materials and simplifying the complex structure of traditional integrated terminal blocks. The terminal block can be processed by only one step of stamping, drilling and tapping, reducing the processing steps of milling notches, making processing faster and producing less waste, thus reducing the production cost of the junction box. The terminal frame can be made by only drawing, making processing fast and low-cost. The terminal block and the terminal frame can be quickly installed through embedded interference fit, improving the reliability of electrical connection.

[0023] Optionally, the junction box body has a through mounting hole and a receiving groove communicating with the mounting hole. The extending direction of the receiving groove is perpendicular to the extending direction of the mounting hole. The mounting hole is used for inserting the connector and the receiving groove is used for inserting the connector frame.

[0024] By adopting the above technical solution, when installing the wiring structure, the wiring frame is first inserted into the receiving groove, then the wiring piece is inserted into the mounting hole, and the wiring piece is embedded in the wiring frame. At this time, the wiring structure can be limited and fixed, and the structure is simple and easy to install.

[0025] Optionally, the cross-sectional dimensions of the wiring frame are not less than the depth of the receiving groove.

[0026] By adopting the above technical solution, the existing wiring terminals are inserted into the mounting holes along the extension direction of the mounting holes. A countersunk hole communicating with the mounting holes is opened on the outer surface of the electricity meter, allowing bolts to be screwed in. After the bolts are screwed in, the bolt heads are recessed into the countersunk holes, making it impossible to connect wires to the bolts during meter calibration. Therefore, a calibration plate is needed to connect wires during calibration. However, the design of this application allows the bolt heads to protrude outside the receiving groove. During meter calibration, only the wires need to be connected to the bolt heads, eliminating the need for a calibration plate and reducing costs.

[0027] Optionally, the junction box body is further provided with a limiting groove, which is provided on the opening surface of the receiving groove. The limiting groove is connected to the mounting hole and the receiving groove, and the groove width of the limiting groove is smaller than the groove width of the receiving groove.

[0028] By adopting the above technical solution, the design of the limiting groove can physically limit the wiring frame, preventing it from shifting or rotating during installation or use, ensuring accurate alignment. In addition, the existence of the limiting groove makes it convenient for operators to observe whether the wires pass smoothly through the mounting holes and enter the inner hole of the wiring frame, making the wire insertion operation more convenient and reducing assembly difficulty and the risk of operational errors.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By separating the terminal block from the terminal frame, processing is faster and waste is less, thus reducing production costs;

[0031] 2. Dividing the connector into a wider body and a narrower insertion part improves ease of operation and reduces the width of the connector frame, saving processing materials;

[0032] 3. The bolt head protrudes outside the receiving groove, so during calibration, only the wires need to be connected to the bolt head, eliminating the need for calibration plates and reducing costs. Attached Figure Description

[0033] Figure 1 This is an exploded view of the wiring terminals and the electricity meter in the existing technology.

[0034] Figure 2 This is a schematic diagram of the junction box in this application.

[0035] Figure 3 This is an exploded view of the wiring structure in this application.

[0036] Figure 4 This is a schematic diagram of another embodiment of the wiring structure in this application.

[0037] Figure 5 This is a schematic diagram of another embodiment of the wiring structure in this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Mounting hole; 2. Connecting piece; 21. Main body; 211. Guide slope; 22. Insertion part; 221. Anti-slip groove; 23. Wiring hole; 24. Welding end; 3. Wiring frame; 31. Fixing hole; 4. Receiving groove; 5. Bolt; 6. Limiting groove; 7. Calibration piece; 71. Through hole; 8. Wiring terminal; 81. Wiring hole; 811. First wiring hole; 812. Second wiring hole; 82. Connection hole; 83. Notch; 9. Junction box body. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 2-5 This application will be described in further detail.

[0040] This application discloses a junction box. (Refer to...) Figure 2 The junction box includes a junction box body 9 and a wiring structure mounted on the junction box body 9. The wiring structure includes a connector 2 and a connector frame 3. A mounting hole 1 is formed through the junction box body 9, and a receiving groove 4 communicating with the mounting hole 1 is also formed on the junction box body 9. The receiving groove 4 is formed on the adjacent surface of the opening surface of the mounting hole 1, and the opening direction of the receiving groove 4 is perpendicular to the opening direction of the mounting hole 1. The mounting hole 1 is used for inserting the connector 2 and the wire, and the receiving groove 4 is used for inserting the connector frame 3.

[0041] Reference Figure 2 The wiring frame 3 is a frame with an inner hole, and the inner hole of the wiring frame 3 penetrates the two opposite surfaces of the wiring frame 3. The two ends of the wiring frame 3 are respectively used for the end of the wiring piece 2 to be embedded and for the wire to be inserted. The wiring piece 2 is electrically connected to the wiring frame 3 and is used to electrically connect with the wire, thereby realizing the electrical connection of the wiring piece 2, the wiring frame 3 and the wire.

[0042] Reference Figure 2 The junction box body 9 is also provided with a limiting groove 6. The limiting groove 6 is provided on the opening surface of the receiving groove 4. The limiting groove 6 is connected to the receiving groove 4 and the mounting hole 1. The groove width of the limiting groove 6 is smaller than the groove width of the receiving groove 4. The limiting groove 6 can limit the wiring frame 3. The existence of the limiting groove 6 makes it convenient for the operator to observe whether the wire passes smoothly through the mounting hole 1 and enters the opening of the wiring frame 3, which makes the wire insertion operation more convenient.

[0043] In other embodiments, the limiting groove 6 may not be provided on the junction box body 9. The structural dimensions of the receiving groove 4 are adapted to the structural dimensions of the wiring frame 3, and the receiving groove 4 itself limits the wiring frame 3.

[0044] Reference Figure 2 and Figure 3The connector 2 includes a body portion 21 and an insertion portion 22. The body portion 21 is located outside the connector frame 3, and the insertion portion 22 is used to be inserted into the inner cavity of the connector frame 3 through an opening in the connector frame 3. The width of the insertion portion 22 is smaller than the width of the body portion 21. Guide slopes 211 are formed on two opposite sidewalls of the body portion 21 near the end of the insertion portion 22. The distance between the two guide slopes 211 decreases along the arrangement direction of the body portion 21 and the insertion portion 22. The guide slopes 211 are used to guide the body portion 21 into the mounting hole 1.

[0045] Reference Figure 3 A wiring hole 23 is provided on the end of the main body 21 away from the insertion part 22. The wiring hole 23 is a threaded hole and is provided on the long and wide surfaces of the main body 21, extending in a direction perpendicular to the arrangement direction of the main body 21 and the insertion part 22. The wiring hole 23 is used to fix the wire, thereby realizing electrical connection.

[0046] Reference Figure 3 and Figure 4 In other embodiments, the wiring hole 23 may not be provided on the main body 21. The wiring piece 2 also includes a welding end 24, which is located on the end of the main body 21 away from the insertion part 22. The welding end 24 is used to weld to the wire to achieve electrical connection.

[0047] Reference Figure 3 The thickness of the insertion part 22 is smaller than the opening size of the wiring frame 3. The insertion part 22 is used to fit tightly against the inner wall of the wiring frame 3, thereby achieving electrical connection. Multiple anti-slip grooves 221 are formed on the surface of the insertion part 22 away from the contact surface with the inner wall of the wiring frame 3. The multiple anti-slip grooves 221 are arranged along the arrangement direction of the main body 21 and the insertion part 22, and the anti-slip grooves 221 extend along the width direction of the insertion part 22.

[0048] Reference Figure 2 and Figure 3 The thickness of the wiring frame 3 is equal to the depth of the receiving groove 4. That is, after the wiring frame 3 is installed in the receiving groove 4, the surface of the bottom wall of the wiring frame 3 away from the receiving groove 4 is flush with the opening surface of the receiving groove 4 on the electricity meter. The wiring structure of the electricity meter also includes a bolt 5. A fixing hole 31 communicating with the inner cavity of the wiring frame 3 is provided on the surface of the bottom wall of the wiring frame 3 away from the receiving groove 4. The fixing hole 31 is a threaded hole, and the bolt 5 is screwed into the fixing hole 31. The end of the bolt 5 is pressed against the opening surface of the anti-slip groove 221 on the insertion part 22, thereby firmly fixing the wire to the insertion part 22. Since the bolt head of the bolt 5 is located outside the receiving groove 4, when meter calibration is required, the wire can be directly clamped onto the bolt head for electrical connection, or the wire can be clamped between the wiring frame 3 and the bolt head for electrical connection.

[0049] In other embodiments, the receiving groove 4 can be opened on the surface of the electricity meter opposite to the opening surface of the mounting hole 1. The connecting piece 2 and the connecting frame 3 are fixed to the electricity meter by means of bolt assembly or adhesive, as long as the connecting piece 2 and the connecting frame 3 can be electrically connected.

[0050] Reference Figure 2 and Figure 5 In other embodiments, the wiring structure of the electricity meter also includes a calibration plate 7, which has a through hole 71. A bolt 5 passes through the through hole 71 to clamp and fix the calibration plate 7 between the wiring frame 3 and the bolt head. The calibration plate 7 is used for electrical connection with the wire. The calibration plate 7 is L-shaped, and the bent surface of the calibration plate 7 extends away from the bottom wall of the receiving groove 4. In this embodiment, the thickness of the wiring frame 3 can be less than the depth of the receiving groove 4.

[0051] The assembly principle of the wiring structure of an electricity meter according to an embodiment of this application is as follows: First, insert the wiring frame 3 into the receiving groove 4, then insert the wiring piece 2 into the mounting hole 1, and at the same time, insert the insertion part 22 into the inner cavity of the wiring frame 3 through the opening of the wiring frame 3. Screw the bolt 5 into the fixing hole 31 to fix the wiring piece 2 on the wiring frame 3, and then connect the wire to realize the electrical connection between the wire, the wiring piece 2 and the wiring frame 3.

[0052] This application separates the connector 2 and the connector frame 3 into a single design and fits them with the mounting hole 1 and the receiving groove 4. This eliminates the need for milling, resulting in faster processing, less waste, and reduced production costs. Furthermore, the bolt head of the bolt 5 is exposed outside the receiving groove 4, eliminating the need for the calibration plate 7 and further reducing costs.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wiring structure for an electricity meter, characterized in that: The device includes a connector (2), a connector frame (3), and a bolt (5). The connector frame (3) is a frame with an inner hole, and the inner hole of the connector frame (3) passes through two opposite surfaces of the connector frame (3). The end of the connector (2) is embedded in the inner hole of the connector frame (3). A fixing hole (31) communicating with the inner cavity of the connector frame (3) is opened on the surface of the connector frame (3). The bolt (5) is threaded into the fixing hole (31). The connector (2) is used for electrical connection with the wire.

2. The wiring structure of the electricity meter according to claim 1, characterized in that: The connector (2) includes a body (21) and an insertion part (22) for inserting into the inner hole of the connector frame (3), wherein the width of the insertion part (22) is smaller than the width of the body (21).

3. The wiring structure of the electricity meter according to claim 2, characterized in that: Guide slopes (211) are formed on the two back sidewalls of the body part (21) near the end of the insertion part (22), and the distance between the two guide slopes (211) decreases along the direction of the insertion part (22) into the inner hole of the wiring frame (3).

4. The wiring structure of the electricity meter according to claim 2, characterized in that: The insertion part (22) has multiple anti-slip grooves (221), and each anti-slip groove (221) is arranged along the direction of the insertion of the connector (2) into the inner hole of the connector frame (3).

5. The wiring structure of the electricity meter according to claim 2, characterized in that: The connector (2) also includes a welding end (24), which is located at the end of the body (21) away from the insertion part (22) and is used to weld to the wire.

6. The wiring structure of the electricity meter according to claim 1, characterized in that: It also includes a calibration plate (7), on which a through hole (71) is provided for the bolt (5) to pass through.

7. A junction box, characterized in that: Includes a junction box body (9) and a wiring structure as described in claim 1 mounted on the junction box body (9).

8. The junction box according to claim 7, characterized in that: The junction box body (9) has a through mounting hole (1) and a receiving groove (4) communicating with the mounting hole (1). The extending direction of the receiving groove (4) is perpendicular to the extending direction of the mounting hole (1). The mounting hole (1) is used for inserting the connector (2) and the receiving groove (4) is used for inserting the connector frame (3).

9. The junction box according to claim 8, characterized in that: The cross-sectional dimensions of the wiring frame (3) are not less than the groove depth of the receiving groove (4).

10. The junction box according to claim 8, characterized in that: The junction box body (9) is also provided with a limiting groove (6), which is provided on the opening surface of the receiving groove (4). The limiting groove (6) is connected to the mounting hole (1) and the receiving groove (4). The groove width of the limiting groove (6) is smaller than the groove width of the receiving groove (4).

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