Expansion type terminal

Abstract

The utility model provides a collapsible terminal, which is characterized in that a through hole of a terminal seat is internally provided with a thread, a pull rod passes through the terminal seat and a through hole in a crimping seat, the upper part and the lower part of the pull rod are both provided with threads, and the thread at the lower part of the pull rod is matched with the thread in the through hole of the terminal seat. The bottom of the pull rod is fixed at the bottom of the terminal seat through a fixing nut, the expansion and contraction piece penetrates through the top of the pull rod, a top end nut is integrally formed at the top of the expansion and contraction piece and matched with the upper portion of the pull rod in a threaded mode, and the bottom of the expansion and contraction piece makes contact with the top of a limiting table of the crimping seat. The crimping sleeve penetrates through the expansion and contraction sheet and is in threaded connection with the crimping seat; the collapsible terminal is filled in an electric energy meter module or an electric appliance product in an interference manner, the conductive cross section is sufficient, the resistance at the node is reduced, the occurrence of electricity accidents is reduced, the collapsible sheet is collapsed by controlling the lifting of the pull rod, and an electric meter or a switch is more convenient to install or take down.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter connectors, and in particular to an expansion and contraction type terminal. Background Technology

[0002] Many existing electrical switches and equipment have cylindrical connectors. It's difficult to completely fill the tube with copper busbars or wires, resulting in insufficient conductive cross-section, increased resistance at the junctions, and potential accidents, including fire hazards. Currently, the terminals of electricity meter connectors are open at the top, allowing for sufficient expansion but insufficient contraction, making it difficult to plug and unplug meters or switches. Summary of the Invention

[0003] The purpose of this invention is to provide an expansion and contraction terminal to address the shortcomings of existing technologies.

[0004] The new technical solution adopted by this utility model is as follows:

[0005] An expandable terminal includes a crimping sleeve, an expandable tab, a pull rod, a crimping seat, a terminal base, and a fixing nut. The terminal base and the crimping seat are integrally formed, and both the terminal base and the crimping seat have through holes. The through holes of the terminal base have threads. The pull rod passes through the through holes of the terminal base and the crimping seat, and both the upper and lower parts of the pull rod have threads. The thread on the lower part of the pull rod mates with the thread in the through hole of the terminal base. The bottom of the pull rod is fixed to the bottom of the terminal base by a fixing nut. The expandable tab passes through the top of the pull rod, and the top of the expandable tab has an integrally formed top nut that matches the thread on the upper part of the pull rod. The bottom of the expandable tab contacts the top of the limiting platform of the crimping seat. The crimping sleeve passes through the expandable tab and is threadedly connected to the crimping seat.

[0006] The expansion and contraction sheet is lantern-shaped, and each expansion and contraction sheet consists of 4 pieces.

[0007] The crimping seat is conical.

[0008] The lower limiting platform of the crimping seat is provided with threads.

[0009] The terminal block is square.

[0010] The crimping sleeve is tapered.

[0011] The press sleeve has internal threads, and the internal threads of the press sleeve match the threads on the lower part of the press seat.

[0012] The beneficial effects of this utility model are as follows: the expansion and contraction terminals are interference-filled in the electricity meter module or electrical product, with sufficient conductive cross-section and reduced resistance at the junction, reducing the occurrence of electrical accidents. The expansion and contraction of the expansion and contraction plates are realized by controlling the lifting and lowering of the pull rod, making it more convenient to install or remove the electricity meter or switch. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the crimp sleeve.

[0015] Figure 3 This is a schematic diagram of the expansion and contraction sheet.

[0016] Figure 4 This is a schematic diagram of the terminal block structure.

[0017] Figure 5 This is a schematic diagram of the structure of the present invention used in an electricity meter module.

[0018] Wherein: 1 is the crimping sleeve, 2 is the expansion and contraction plate, 201 is the top nut, 3 is the pull rod, 4 is the crimping seat, 401 is the limiting platform, 5 is the terminal seat, 6 is the fixing nut, 7 is the energy meter module, and 8 is the terminal interface. Detailed Implementation

[0019] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0020] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0021] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0022] An expandable terminal includes a crimping sleeve 1, an expandable plate 2, a pull rod 3, a crimping seat 4, a terminal base 5, and a fixing nut 6. The terminal base 5 and the crimping seat 4 are integrally formed, and both the terminal base 5 and the crimping seat 4 have through holes. The through holes of the terminal base 5 are threaded. The pull rod 3 passes through the through holes of the terminal base 5 and the crimping seat 4, and both the upper and lower parts of the pull rod 3 are threaded. The thread on the lower part of the pull rod 3 matches the thread in the through hole of the terminal base 5. The bottom of the pull rod 3 is fixed to the bottom of the terminal base 5 by the fixing nut 6. The expandable plate 2 passes through the top of the pull rod 3, and the top of the expandable plate 2 is integrally formed with a top nut 201. The top nut 201 matches the thread on the upper part of the pull rod 3. The bottom of the expandable plate 2 contacts the top of the limiting platform 401 of the crimping seat 4. The crimping sleeve 1 passes through the expandable plate 2 and is threadedly connected to the crimping seat 4.

[0023] The expansion and contraction sheet 2 is lantern-shaped, and there are 4 expansion and contraction sheets 2 in total.

[0024] The crimping seat 4 is conical.

[0025] The lower limiting platform 401 of the crimping seat 4 is provided with threads.

[0026] The terminal block 5 is square.

[0027] The crimping sleeve 1 is tapered.

[0028] The crimping sleeve 1 has internal threads, and the internal threads of the crimping sleeve 1 match the lower threads of the crimping seat 4.

[0029] Working principle:

[0030] The pull rod 3 is passed through the through holes of the crimping seat 4 and the terminal seat 5. The thread at the bottom of the pull rod 3 is engaged with the thread in the through hole of the terminal seat 5. The bottom of the pull rod 3 is screwed with a fixing nut 6 to fix it to the bottom of the terminal seat 5. The expansion and contraction piece 2 is put on the top of the pull rod 3. The top nut 201 of the expansion and contraction piece 2 is engaged with the thread at the top of the pull rod 3 to fix the expansion and contraction piece 2 on the pull rod 3. The bottom of the expansion and contraction piece 2 is exactly against the top of the limiting platform 401 of the crimping seat 4. Then the crimping sleeve 1 is passed through the expansion and contraction piece 2. The internal thread of the crimping sleeve 1 is engaged with the external thread of the crimping seat 4 to connect. The crimping sleeve 1 binds the lower part of the expansion and contraction piece 2 to the outer wall of the crimping seat 4.

[0031] In use, the terminal block 5 of the expansion and contraction terminal is fixed on the terminal interface 8 of the energy meter module 7, and the energy meter is inserted into the expansion and contraction plate 2. At this time, the fixing nut 6 can be adjusted to move the pull rod 3 downward. The expansion and contraction plate 2 is pushed outward under the action of the pull rod 3 so that the energy meter and the expansion and contraction plate 2 make interference contact and have sufficient conductivity. When it is necessary to remove the energy meter, simply adjust the fixing nut 6 to move the pull rod 3 upward. The expansion and contraction plate 2 is released from the pressure of the limit platform 401 and the pull rod 3 and retracts inward, so that the energy meter can be easily pulled off the expansion and contraction plate 2.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An expansion terminal comprising a crimping sleeve, an expansion piece, a pull rod, a crimping seat, a terminal seat and a fixing nut, characterized in that: The terminal seat and the crimping seat are integrally formed, and the terminal seat and the crimping seat are internally provided with through holes, the through hole of the terminal seat is provided with a screw thread, the pull rod passes through the through holes in the terminal seat and the crimping seat, the upper and lower parts of the pull rod are provided with screw threads, the screw thread of the lower part of the pull rod is matched with the screw thread in the through hole of the terminal seat, the bottom of the pull rod is fixed on the bottom of the terminal seat through a fixing nut, the expansion and contraction sheet passes through the top of the pull rod, the top of the expansion and contraction sheet is integrally formed with a top end nut, the top end nut is matched with the screw thread of the upper part of the pull rod, the bottom of the expansion and contraction sheet is in contact with the top of the limiting table of the crimping seat, and the crimping sleeve is threadedly connected with the crimping seat through the expansion and contraction sheet.

2. An expansion terminal according to claim 1, wherein: The expansion and contraction sheet is lantern type, and each expansion and contraction sheet is four pieces.

3. An expanding terminal according to claim 1, wherein: The crimping seat is conical.

4. An expansion terminal according to claim 3, wherein: The lower part of the limiting table of the crimping seat is provided with a screw thread.

5. An expansion terminal according to claim 1, wherein: The terminal seat is square.

6. An expansion terminal according to claim 1, wherein: The crimping sleeve is conical.

7. An expansion terminal according to claim 6, wherein: The crimping sleeve is internally provided with a screw thread, and the screw thread in the crimping sleeve is matched with the screw thread of the lower part of the crimping seat.

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