A neutral terminal for electric energy metering box

Abstract

The utility model provides a neutral terminal for an electric energy meter box, including an insulating base and a bolt; a blind hole is provided on the top surface of the insulating base, a plurality of protrusions are provided on the wall of the blind hole, a slot is formed between each two adjacent protrusions, and the inner side surfaces of the plurality of protrusions are enclosed to form a channel for bolt installation; the bolt is fixed in the blind hole, and the head of the bolt includes a circular plate portion and limit blocks arranged at equal intervals on its side, the number of the limit blocks is the same as that of the protrusions, and the shape and size are arranged corresponding to the slot, and the limit blocks are tightly attached to the bottom surface of the protrusion. In the utility model, the bolt and the insulating base in the neutral terminal are detachably connected, which is convenient for targeted replacement according to the specific damaged parts of the neutral terminal, thereby improving the use efficiency of the parts. At the same time, due to the detachable connection structure between the various parts of the neutral terminal, the terminal can be quickly disassembled and classified and stored after the overall replacement, thereby improving the convenience of secondary processing and production of various parts.

Description

Technical Field

[0001] The utility model belongs to the field of neutral line terminals, in particular to a neutral line terminal for an electric energy metering box. Background Art

[0002] At present, the terminals used in power distribution equipment are commonly small-capacity "UK" series terminals and large-capacity "TC" series terminals. The terminals of this structure occupy a large space. In order to save space in the meter box, some merchants set the neutral terminal to Figure 1 , 2 The structural form shown includes an insulating base 1 and a bolt 4, wherein the insulating base 1 is made of phenolic resin, and the bolt 4 is made of metal. The bottom surface of the insulating base 1 is provided with a limit block and a hole, and the top surface of the insulating base is provided with a blind hole. The bolt 4 matches the nut 3. When the bolt 4 and the blind hole are matched and assembled, the head of the bolt 4 and the nut 3 are both located in the blind hole, and then the blind hole is cast with phenolic resin. After the phenolic resin is cured, the nut 3 and the head of the bolt 4 are fixed in the blind hole.

[0003] In the present zero-line terminal structure, since the bolt 4, nut 3 and insulating base 1 are fixedly connected as one by phenolic resin casting, the bolt 4 and insulating base 1 cannot be disassembled. Once the bolt 4 or insulating base 1 is damaged or the terminal cannot be used due to assembly defects, the zero-line terminal can only be replaced as a whole, resulting in a waste of resources. On the other hand, the non-detachable structure causes the terminal to be recycled and classified for secondary processing and production. The terminal needs to be hot-melted first to separate the bolt and the insulating base. Before the bolt is melted for secondary production, the phenolic layer it adheres to needs to be removed, and then each is produced for secondary production. This disassembly method causes inconvenience in production. Utility Model Content

[0004] In view of this, the utility model aims to propose a neutral line terminal for an electric energy meter box, which realizes detachable connection of various parts in the neutral line terminal, facilitates targeted replacement of damaged parts, and facilitates recycling for secondary production.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A neutral terminal for an electric energy meter box, comprising an insulating base and a bolt;

[0007] The top surface of the insulating base is provided with a blind hole, and the wall of the blind hole is provided with a plurality of convex blocks at equal intervals in the circumferential direction, a slot is formed between each two adjacent convex blocks, and the inner side surfaces of the plurality of convex blocks are all concave arc surfaces, enclosing a channel for bolt installation;

[0008] The bolt is installed in the blind hole, the head of the bolt is located between the protrusion and the bottom of the blind hole, the screw portion thereof passes through the channel, and the bolt and the insulating base are connected and fixed by a matching nut; the head portion includes a circular plate portion and limit blocks arranged at equal intervals on its side surface, the number of the limit blocks is the same as that of the protrusion, and the shape and size are arranged corresponding to the slot, and the limit blocks are tightly attached to the bottom surface of the protrusion.

[0009] Furthermore, the slot is a rectangular slot structure, and its width is smaller than the width of the protrusion; a limiting slot corresponding to the limiting block is formed on the bottom surface of the protrusion, and the limiting block is inserted into the limiting slot.

[0010] Furthermore, the protrusion is arranged at the lower middle position of the blind hole, and the distance from the bottom surface of the protrusion to the bottom of the blind hole is set correspondingly to the thickness of the head of the bolt;

[0011] The bolt is matched with a fixing sleeve, which is sleeved on the screw portion of the bolt, with the bottom surface of the fixing sleeve fitting against the top surface of the protrusion, and the fixing sleeve and the insulating base are connected and fixed by bolts and nuts.

[0012] Furthermore, the fixing sleeve is a resin insulating sleeve.

[0013] Furthermore, the lower part of the insulating base is symmetrically provided with wing plate parts, and the wing plate parts are provided with fixing holes.

[0014] Furthermore, the protrusion is an insulating block, which is integrally formed with the insulating base.

[0015] Furthermore, the insulating base is a resin base.

[0016] Compared with the prior art, the neutral terminal for an electric energy meter box described in the utility model has the following advantages:

[0017] (1) In the utility model, the bolts and the insulating base in the neutral terminal are detachably connected, which is convenient for targeted replacement of damaged parts of the neutral terminal, thereby improving the efficiency of parts use. At the same time, since the various parts of the neutral terminal are connected in a detachable structure, the terminal can be quickly disassembled and classified for storage after replacement, thereby improving the convenience of secondary processing and production of various parts.

[0018] (2) In the present invention, the limit block on the bolt head is inserted into the limit groove provided on the bottom surface of the protrusion, which limits the freedom of the bolt in the circumferential direction and prevents it from rotating, thereby improving the convenience of bolt fixing and the convenience of subsequent installation and operation of the neutral terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the neutral terminal for the existing electric energy metering box;

[0021] Figure 2 This is a schematic diagram of the structure of the neutral terminal for an existing electric energy metering box;

[0022] Figure 3 This is a schematic diagram of a neutral terminal for an electric energy meter box according to an embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the main structure of the insulating base in the embodiment of the utility model;

[0024] Figure 5 A top view of an insulating base in an embodiment of the utility model;

[0025] Figure 6 This is a front view of a screw in an embodiment of the utility model;

[0026] Figure 7 A top view of a screw in an embodiment of the utility model;

[0027] Description of reference numerals:

[0028] 1-insulating base; 11-bump; 12-blind hole; 13-limiting groove; 14-slot; 15-wing plate; 16-fixing hole; 2-fixing sleeve; 3-nut; 4-bolt; 41-head; 411-circular plate; 412-limiting block. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] A neutral terminal for an electric energy meter box, such as Figure 3 As shown, it includes an insulating base 1 and a bolt 4 . The bolt 4 is installed in the insulating base 1 , and the screw portion 42 thereof extends upward out of the top surface of the insulating base 1 .

[0031] The insulating base 1 is a cylindrical resin member, and its structure is as follows Figure 4 , Figure 5As shown, two wing parts 15 are integrally formed near the bottom surface of the left and right sides of the insulating base 1. The bottom surfaces of the two wing parts 15 are flush with the bottom surface of the insulating base 1. The two wing parts 15 are respectively provided with fixing holes 16. A limiting boss is centrally provided on the bottom surface of the insulating base 1. A hole is opened at the center of the bottom surface of the insulating base 1. The hole is a blind hole structure, and the hole passes through the limiting boss. A blind hole 12 is provided on the top surface of the insulating base. The hole wall of the blind hole 12 is integrally formed with four protrusions 11. The four protrusions 11 are arranged at equal intervals in the circumferential direction. A slot 14 is formed between each adjacent two protrusions 11. The four protrusions 11 form a total of four slots 14. The inner side surfaces of the four protrusions 11, that is, the side surfaces away from the wall of the insulating hole, are all concave arc structures. The inner side surfaces of the four protrusions 11 enclose a channel for inserting the bolt 4.

[0032] Bolt 4 is a metal part, and its structure is as follows Figure 6 , Figure 7 As shown, the head 41 of the bolt 4 includes a circular plate portion 411, the diameter of the circular plate portion 411 is set correspondingly to the channel formed by the four protrusions 11, and four limit blocks 412 are evenly spaced on the side of the circular plate portion 411, and the shape and size of the limit blocks 412 are set correspondingly to the slot 14.

[0033] The assembly structure of the bolt 4 and the insulating base 1 is as follows Figure 3 As shown, during assembly, the head 41 of the bolt 4 is inserted into the channel formed by the four protrusions. When inserting, the four limit blocks 412 of the bolt are opposite to the four slots 14 formed by the protrusions. Then, the bolt 4 is pushed down until its head 41 enters between the protrusion 11 and the bottom of the blind hole 12. The bolt 4 is rotated so that the four limit blocks 412 are each close to the bottom surface of a protrusion 11, and the bolt 4 and the insulating base 1 are connected and fixed with the nut 3.

[0034] In the present invention, the protrusion 11 is a conical block structure, and the slot 14 formed by two adjacent protrusions 11 is a rectangular slot structure, and the width of the slot 14 is smaller than the width of the protrusion 11. A limiting slot 13 corresponding to the limiting block 412 is provided on the bottom surface of each protrusion 11, and the limiting block 412 is inserted into the limiting slot 13 to form a limiting structure to prevent the bolt 4 from rotating, so as to facilitate the screwing of the nut 3 and thus facilitate the fixing of the bolt 4.

[0035] In the present invention, the protrusion 11 is arranged at the middle and lower part of the blind hole 12, and the distance from the bottom surface of the protrusion 11 to the bottom of the blind hole 12 is set correspondingly to the thickness of the head 41 of the bolt 4. The bolt 4 is matched with a fixing sleeve 2, which is a resin insulating sleeve. The fixing sleeve 2 is sleeved on the screw part 42 of the bolt 4, and the bottom surface of the fixing sleeve 2 fits the top surface of the protrusion 11. The bolt 4 and the nut 3 connect and fix the fixing sleeve 2 and the insulating base 1.

[0036] The various parts of the neutral terminal described in the utility model adopt a detachable connection structure, which is convenient for targeted replacement of damaged parts to save material resources. At the same time, the structure can disassemble the neutral terminal, which is convenient for parts classification and conducive to the secondary production of parts.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A neutral terminal for an electric energy meter box, characterized in that: It comprises an insulating base (1) and a bolt (4); The top surface of the insulating base (1) is provided with a blind hole (12), and a plurality of protrusions (11) are evenly spaced in the circumferential direction of the hole wall of the blind hole (12), a slot (14) is formed between every two adjacent protrusions (11), and the inner side surfaces of the plurality of protrusions (11) are all concave arc surfaces, enclosing a channel for installing the bolt (4); The bolt (4) is installed in the blind hole (12), the head (41) of the bolt (4) is located between the protrusion (11) and the bottom of the blind hole (12), the screw portion (42) thereof passes through the passage, and the bolt (4) and the insulating base (1) are connected and fixed by a matching nut (3); the head (41) comprises a circular plate portion (411) and limit blocks (412) arranged at equal intervals on its side, the number of the limit blocks (412) is the same as that of the protrusion (11), and the shape and size are arranged corresponding to the slot (14), and the limit blocks (412) are closely attached to the bottom surface of the protrusion (11).

2. The neutral terminal for an electric energy meter box according to claim 1, characterized in that: The slot (14) is a rectangular slot structure, and its width is smaller than the width of the protrusion (11); The bottom surface of the protrusion (11) is provided with a limiting groove (13) corresponding to the limiting block (412), and the limiting block (412) is inserted into the limiting groove (13).

3. The neutral terminal for an electric energy meter box according to claim 1, characterized in that: The protrusion (11) is arranged at the lower middle position of the blind hole (12), and the distance from the bottom surface of the protrusion (11) to the bottom of the blind hole (12) and the thickness of the head (41) of the bolt (4) are set accordingly; The bolt (4) is matched with a fixing sleeve (2), the fixing sleeve (2) is sleeved on the screw portion (42) of the bolt (4), the bottom surface of the fixing sleeve (2) and the top surface of the protrusion (11) are in contact with each other, and the fixing sleeve (2) and the insulating base (1) are connected and fixed by the bolt (4) and the nut (3).

4. The neutral terminal for an electric energy meter box according to claim 3, characterized in that: The fixing sleeve (2) is a resin insulating sleeve.

5. The neutral terminal for an electric energy meter box according to claim 1, characterized in that: The lower part of the insulating base (1) is symmetrically provided with a wing plate portion (15), and the wing plate portion (15) is provided with a fixing hole (16).

6. The neutral terminal for an electric energy meter box according to claim 1, characterized in that: The convex block (11) is an insulating block, which is integrally formed with the insulating base (1).

7. The neutral terminal for an electric energy meter box according to claim 1, characterized in that: The insulating base (1) is a resin base.

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