Connecting terminal for motor and strip structure of connecting terminal

Abstract

The utility model discloses a connecting terminal for a motor and a strip structure of the connecting terminal, the connecting terminal is formed by continuously blanking a thin copper coiled material, two adjacent terminals are connected through an upper connecting rib and a lower connecting rib, the upper connecting rib, the lower connecting rib and the side edges of the adjacent terminals form feeding positioning holes, and the upper connecting rib and the lower connecting rib form feeding positioning holes. Each independent terminal comprises a lower end inserting part, a middle wire clamping and welding part and an upper end connecting part, oblique angle bulges are symmetrically arranged on the left side and the right side of the lower end inserting part, a rectangular hole is formed in the middle wire clamping and welding part, and a rectangular thin sheet is bent outwards to form a V-shaped pressing sheet. According to the utility model, the structural design is reasonable, continuous, rapid and automatic feeding can be realized, reliable connection with a winding skeleton can be realized, the V-shaped pressing sheet is arranged for pressing an enameled wire, and reliable conduction between the enameled wire and a terminal is realized by adopting a welding mode after the enameled wire is pressed.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technology field especially relates to a kind of connecting terminal and its strip structure for small motor. BACKGROUND

[0002] Motor terminal is used to connect motor winding lead and external power line.

[0003] The patent file with disclosure number CN221728021U discloses motor stator coil package plug pin wiring structure and power line terminal, conductive plug pin is arranged on winding skeleton, and the conductive plug pin is welded with enameled wire wound on the skeleton. The conductive plug pin is provided on the winding skeleton, the conductive plug pin is molded and embedded, the enameled wire is wound on the conductive plug pin and then welded with solder to conduct, the enameled wire needs to be pre-removed paint film and then manually wound, and the quality of winding is difficult to guarantee, and manual soldering is also very troublesome, which is not suitable for automatic production.

[0004] The patent file with disclosure number CN215989269U discloses motor enameled wire terminal, which is a riveting piercing terminal structure, a plurality of piercing grooves are arranged inside, and the enameled wire paint film is pierced by physical riveting or pressure connection, but the terminal forming is complex, and can only be riveted with the enameled wire one by one, so that it is difficult to realize automatic pressure connection by continuous feeding.

[0005] The patent file with disclosure number CN220692352U discloses a new motor terminal, which is a piercing terminal structure, and the enameled wire is clamped by a flexible cantilever, the flexible cantilever side is provided with a sawtooth, and the sawtooth is used for extruding and piercing the paint of the enameled wire, and the terminal and the enameled wire form an electrically conductive connection. But this terminal and enameled wire belong to point-to-point contact, only the piercing point realizes conduction, and the piercing depth is uncontrollable, so it is difficult to guarantee product quality. SUMMARY

[0006] The utility model aims at solving the above technical problem, and provides a kind of connecting terminal and its strip structure for small motor, which can realize continuous feeding and can be reliably connected with winding skeleton.

[0007] In order to realize the above technical purpose and achieve the above technical requirements, the utility model adopts the following technical scheme: a kind of connecting terminal and its strip structure for motor are formed by continuous punching of thin copper coil material, two terminals adjacent are connected by upper connecting rib and lower connecting rib, the upper connecting rib and the lower connecting rib form feeding positioning hole with the side edge of adjacent terminal, and each independent terminal includes lower end insertion part, middle wire clamping welding part and upper end connecting part.

[0008] Preferably, the lower end insertion part of the terminal is provided with inclined angle protrusions symmetrically on the left and right sides.

[0009] Preferably, the sum of the protruding height of the bevel protrusion and the terminal thickness is greater than the slot width of the terminal fixing slot, so as to fix the terminal buckle in the terminal fixing slot.

[0010] Preferably, the terminal middle wire clamping fusion portion is provided with a rectangular hole, and the rectangular sheet is outwardly bent to form a V-shaped pressing sheet.

[0011] Preferably, the angle α of the V-shaped pressing sheet is 5°-40°.

[0012] Preferably, the terminal upper end connecting portion is provided in a strip shape, and the upper surface is provided with a connecting hole connected with a control circuit of a motor or a motor lead wire.

[0013] Preferably, the bottom section of the terminal lower end insertion portion is provided in a conical surface, facilitating the introduction of the terminal into the terminal fixing slot.

[0014] Preferably, the feeding positioning hole is provided in a rectangular square hole.

[0015] Compared with the traditional structure, the utility model has the beneficial effects of:

[0016] 1. The utility model discloses a reasonable structure, and the terminal is formed into a terminal strip by one-time blanking of thin copper coiled material, material shape is fully utilized to achieve various use functions, realizes continuous rapid automatic feeding, saves raw materials, reduces cost and facilitates automatic production.

[0017] 2. The utility model discloses reliable conduction, through setting up a V-shaped pressing sheet, is used for pressing enameled wire, and after the enameled wire is pressed, a fusion mode is adopted, through a terminal fusion machine, suitable large current momentary is added to let the paint film gasify, simultaneously, the terminal and enameled wire are fused together to form copper copper alloy of both, realize reliable conduction of enameled wire and terminal. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is a front view of the utility model;

[0020] Figure 3 It is Figure 2 A-A view;

[0021] Figure 4 It is a schematic view of the utility model after enameled wire is put into the terminal;

[0022] Figure 5 It is a schematic view of the utility model after the terminal is clamped and fused;

[0023] Figure 6 It is a schematic view of the utility model after enameled wire is fused;

[0024] Figure 7 The utility model terminal inserts winding skeleton terminal fixed slot schematic drawing;

[0025] In the drawing: 1. terminal, 1-1. bevel protrusion, 1-2. rectangular hole, 1-3. V-shaped pressing piece, 1-4. connecting hole 2. upper connecting rib, 3. lower connecting rib, 4. feeding positioning hole, 5. terminal fixed slot, 6. enameled wire, 7. winding skeleton, 8. motor stator, 9. enameled wire winding, 10. stator core, 11. tungsten rod electrode, 12. red copper electrode, a. terminal I, b. terminal II, c. terminal III, d. terminal IV, e. terminal V. DETAILED DESCRIPTION

[0026] The utility model will be further described below.

[0027] Refer to the attached Figures 1-7 A connecting terminal for motor and its strip structure are formed by continuous punching of thin copper coil material, two adjacent terminals 1 are connected by upper connecting rib 2 and lower connecting rib 3, the upper connecting rib 2 and the lower connecting rib 3 form feeding positioning hole 4 with the side of the adjacent terminal 1, the feeding positioning hole 4 has two main functions: first, it is used for quick and accurate positioning of the copper plate moving forward each time during continuous punching of the terminal, to ensure that the punching step is consistent each time, so that the distance between each terminal and the terminal in the whole strip is equal; second, it is used for continuous and quick feeding when the terminal is inserted into winding skeleton 7 by using special equipment, the feeding position of each terminal is kept at the same position, so that each terminal fixed slot in the winding skeleton is accurately inserted.

[0028] In the preferred embodiment, the lower end insertion part of the terminal 1 is provided with bevel protrusions 1-1 on both sides.

[0029] In the preferred embodiment, the protrusion height of the bevel protrusion 1-1 and the thickness of the terminal 1 are slightly greater than the slot width of the terminal fixed slot 5 on the winding skeleton 7, so that the terminal is firmly buckled and fixed in the terminal fixed slot when installed on the winding skeleton, and is not easy to fall off.

[0030] In the preferred embodiment, the middle wire clamping and fusing part of the terminal 1 is a rectangular hole 1-2 punched in the middle of the terminal 1, and the punched rectangular sheet is bent into a V-shaped sheet 1-3 by an integrated die. When the motor winding enameled wire is connected, the end of the winding enameled wire 6 is clamped into the V-shaped sheet 1-3, the V-shaped sheet 1-3 is pre-clamped, and then a special terminal fusing machine is used for fusing. The tungsten rod electrode 11 clamps the terminal 1 from the front of the sheet, the red copper electrode 12 clamps the terminal 1 from the back of the sheet, and the pressure is continuously applied, while a current of appropriate size is passed through, the high temperature generated by the current will instantly gasify the surface paint film of the enameled wire fixed in the V-shaped groove and expose the copper core wire, at the same time, the pressure applied will make the terminal sheet, the terminal body sheet and the enameled wire slightly melt at high temperature, and after cooling, the three form an alloyed whole, ensuring the reliable connection and conduction of the enameled wire winding 9 and the terminal.

[0031] In the preferred embodiment, the angle α of the V-shaped sheet 1-3 is set to 5°-40°.

[0032] In the preferred embodiment, the upper end connecting part of the terminal 1 is set as a rectangular strip, and the upper surface is provided with a connecting hole 1-4 connected with the control circuit or motor lead-out wire of the motor. The control circuit PCB board can be directly welded and connected with the upper end of the terminal 1, and the lead-out wire can be inserted into the terminal connecting hole 1-4 for fixation and then soldered and connected, thereby fully ensuring the reliability of the conduction connection between the terminal and the motor control circuit.

[0033] In the preferred embodiment, the bottom section of the lower end insertion part of the terminal 1 is set as a tapered surface, which facilitates the introduction of the terminal 1 into the terminal fixing groove 5.

[0034] In the preferred embodiment, the feeding positioning hole 4 is set as a rectangular square hole.

[0035] In specific implementation, the thin copper plate is punched into terminal coils, and then wound into a disc shape, and the surface is subjected to tin plating treatment to prevent oxidation, and the terminal is more easily soldered with tin after zinc plating. In use, the terminal disc is hung on a dedicated terminal insertion machine, and is continuously and accurately positioned through a rectangular feeding positioning hole 4, and a single terminal 1 is cut off from the upper connecting rib 2 and the lower connecting rib 3 by a special clamp and cutter, and is quickly punched into the terminal fixing groove 5 of the winding skeleton 7, and after punching and inserting a terminal, the stator winding skeleton 7 is automatically rotated to the next empty terminal fixing groove 5, and the action of cutting and inserting is repeated, so that the terminal 1 installation and insertion process of the winding skeleton 7 can be continuously and quickly and automatically completed. After the winding skeleton is wound with the enameled wire, the winding head and the winding end are formed, and after winding is completed, the head and the end of the enameled wire are clamped into the V-shaped grooves of the plurality of terminals, respectively, the V-shaped pressing pieces 1-3 are pre-clamped after clamping to prevent the enameled wire from falling off, and then a special terminal fusion machine is used for fusion, after a terminal is fused, the stator winding assembly is automatically rotated to the next terminal by the bearing clamp until the fusion of all terminals (terminal I to terminal V) is completed, after all the terminals are connected with the enameled wire, the upper end connecting part of the terminal can be welded with the control circuit of the motor or the external circuit to realize conduction, so that the motor can be rotated by power supply.

[0036] The above embodiments of the utility model are merely used to clearly illustrate the examples of the utility model, but are not used to limit the protection scope of the utility model, and all equivalent technical solutions also belong to the scope of the utility model, and the patent protection scope of the utility model should be limited by the claims.

Claims

1. A connection terminal for an electric machine and a strip structure thereof, characterized by: Two adjacent terminals (1) are connected by upper connecting rib (2) and lower connecting rib (3), the upper connecting rib (2) and the lower connecting rib (3) form feeding positioning hole (4) with the side of the adjacent terminal (1), each independent terminal (1) comprises lower end insertion part, middle wire clamping and melting part and upper end connecting part.

2. The connection terminal for an electric machine and the strip structure thereof according to claim 1, characterized in that: The terminal (1) is provided with inclined angle protrusion (1-1) on the left and right sides of the lower end insertion part.

3. The terminal and the tape structure for the motor according to claim 2, characterized in that: The sum of the protrusion height of the inclined angle protrusion (1-1) and the thickness of the terminal (1) is greater than the groove width of the terminal fixing groove (5), so as to buckle the terminal (1) in the terminal fixing groove (5).

4. The terminal for an electric machine and the structure of the strip according to claim 1, characterized in that: The middle wire clamping and melting part of the terminal (1) is provided with rectangular hole (1-2), and the rectangular sheet is bent outward to form V-shaped pressing sheet (1-3).

5. The terminal for an electric machine and the strip structure thereof according to claim 4, characterized in that: The angle α of the V-shaped pressing sheet (1-3) is set to 5°-40°.

6. The terminal for an electric machine and the strip structure thereof according to claim 1, characterized in that: The upper end connecting part of the terminal (1) is provided with strip-shaped connecting hole (1-4) connected with the control circuit of the motor or the motor lead wire.

7. The terminal for an electric machine and the strip structure thereof according to claim 1, characterized in that: The bottom cross section of the lower end insertion part of the terminal (1) is provided with a conical surface, which facilitates the introduction of the terminal (1) into the terminal fixing groove (5).

8. The terminal for electric machines and the strip structure thereof according to claim 1, characterized in that: The feeding positioning hole (4) is provided with a rectangular square hole.

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