Current sensor welding tool

Abstract

The utility model discloses a current sensor welding tool which comprises a positioning base and a demolding base, and the positioning base is provided with a positioning groove which is in contact and sleeve connection with the peripheral face of a magnetic core assembly. A stepped groove matched with the PCB and an assembly groove located on one side of the stepped groove and used for fixing PINs are arranged around the notch of the positioning groove; the height of the sum of the positioning groove and the stepped groove is equal to the sum of the axial height of the magnetic core assembly and the thickness of the PCB; a vertically upward ejector pin is arranged on the demolding base, a demolding hole for the ejector pin to pass through is formed in the bottom of the positioning base, and the assembled and welded current sensor is ejected out of the positioning groove by the ejector pin through the demolding hole. The tool provided by the utility model can effectively improve the working efficiency of the welding task of the current sensor, and also can ensure the stability of the welded current sensor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of current sensor, especially relates to a current sensor welding tool. BACKGROUND

[0002] The current sensor is a kind of detection device, can detect the information of current, and can be detected information, according to certain rule change becomes the electric signal or other required form information output in compliance with certain standard needs, to meet the transmission, processing, storage, display, record and control etc.

[0003] And for the assembly and welding work of current sensor, due to the shape of each part is quite different, it is difficult to achieve the best assembly size (product assembly size fluctuation is larger), this will cause the magnetic core bias, and PIN needle and PCB board matching difficulty.

[0004] Due to the magnetic core bias, the position of the generated magnetic field will also be affected, and then the magnetic field signal is affected to the circuit processing.Most ultimately lead to linearity decline.

[0005] Patent document CN211785657U discloses a kind of current sensor pin fast positioning tool with angle, including the placement table of rectangle, the top of the placement table is equipped with the placement slot for placing the current sensor shell to be tested, the top of the placement table is equipped with a group of positioning holes, each group of positioning holes is located at the two sides of placement slot, when using, corresponding first support column and second support column are inserted in one group of positioning holes, the top of first support column is equipped with first positioning slot, the top of second support column is equipped with second positioning slot, the top of placement slot is equipped with the baffle of rectangle, the baffle is assembled in the slot of first support column and second support column at two ends, respectively, the bottom of baffle is fixed with the baffle for measuring the pin of current sensor.

[0006] Patent document CN219152752U is a kind of pressing tool of current sensor and alternating current output assembly, including bottom plate (1), stand (2), cantilever (3), operating lever (4), pressing rod (5), profiling pressure head (6);The bottom plate is horizontally arranged to support the components of pressing tool;The stand is vertically fixed on the bottom plate;The cantilever is transversely fixed on the stand;The operating lever and the pressing rod are fixed at the end of cantilever, and transmission mechanism is arranged between operating lever and pressing rod, and operating lever can drive pressing rod to move up and down reciprocatingly by pulling;The profiling pressure head is fixed at the bottom end of pressing rod, and can push down current sensor (11) under the driving of pressing rod, and press current sensor and alternating current output assembly (12). SUMMARY

[0007] The utility model discloses a purpose lies in providing a current sensor welding frock, this frock can effectively improve the working efficiency of current sensor welding task, can guarantee the stability of current sensor after welding simultaneously.

[0008] In order to realize the utility model's purpose, provide the following technical scheme: a current sensor welding frock, including positioning base and stripping base, be equipped with with the positioning recess of the outer peripheral surface contact sleeve of magnetic core assembly on the positioning base, be equipped with with the step recess of the PCB board matching around the positioning recess slot and the component recess for fixing PIN needle at one side of the step recess,

[0009] The height of the sum of the positioning recess and the step recess is equal to the sum of the axial height of the magnetic core assembly and the thickness of the PCB board.

[0010] The stripping base is equipped with the vertical upwards thimble, and the bottom of the positioning base is equipped with the stripping hole for the thimble to pass through, and the thimble passes through the stripping hole and ejects the current sensor of completing assembly welding from the positioning recess.

[0011] The utility model discloses a frock clamp to the assembly size positioning, increases the stability of product assembly size ( makes the cooperation clearance approach ideal value), and further increases the stability of magnetic field, finally makes the linearity of sensor tend to be stable.

[0012] Specifically, the slot of the step recess is provided with an opening chamfer to facilitate the accurate covering of the PCB board on the magnetic core assembly.

[0013] Specifically, the range of the opening chamfer is 30°-45°.

[0014] Specifically, the component recess includes a first rectangular groove for fixing the PIN needle terminal and a second rectangular groove located at one side of the first rectangular groove and communicating with the first rectangular groove, and the second rectangular groove is used for fixing the needle tip end of the PIN needle.

[0015] Specifically, the second rectangular groove length direction section is a V-shaped structure, facilitating the positioning of the PIN needle, and also avoiding the difficulty in quick positioning due to the non-complete straight line of the needle tip end.

[0016] Specifically, the stripping hole has a plurality of stripping holes, and the plurality of stripping holes are arranged around the bottom of the positioning recess, so that the magnetic core assembly is uniformly stressed during stripping, and secondary damage to the finished product after welding is avoided.

[0017] Specifically, the end of the thimble for ejecting the current sensor is a circular arc head, facilitating the smoother entry of the thimble into the stripping hole.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] Tooling fixtures are used to position assembly dimensions. Compared with traditional manual assembly and welding processes, this not only effectively improves the efficiency of assembly and welding, but also ensures that the performance of products produced in the same batch is consistent and stable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the welding fixture for the current sensor provided in this embodiment;

[0021] Figure 2 This is a schematic diagram of the positioning base provided in this embodiment;

[0022] Figure 3 This is a cross-sectional view of the stepped groove and the positioning groove provided in this embodiment;

[0023] Figure 4 This is a cross-sectional view of the component groove provided in this embodiment;

[0024] Figure 5 This is a schematic diagram of the demolding base provided in this embodiment;

[0025] In the diagram, 1 is the PCB board; 2 is the magnetic core assembly; 3 is the positioning base; 4 is the demolding base; 5 is the pin; 301 is the stepped groove; 302 is the positioning groove; 303 is the demolding hole; 304 is the first rectangular groove; 305 is the second rectangular groove; 306 is the chamfered opening; 401 is the base; and 402 is the ejector pin. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] like Figure 1 As shown, this embodiment provides a current sensor welding fixture. The 2C001 current sensor selected in this embodiment includes a PCB board 1, a PIN pin 3, and a magnetic core assembly 2. The PIN pin terminal 3 and the magnetic core assembly 2 are both welded to the PCB board 1. The matching fixture includes a positioning base 3 and a demolding base 4.

[0028] like Figure 2As shown in the figure, the positioning base 3 is a square box, and a positioning groove 302 is arranged on the positioning base 3 to contact and fit the outer circumferential surface of the magnetic core assembly 2. A stepped groove 301 is further arranged around the positioning groove 302, which is matched with the PCB 1 to facilitate embedding and fixing of the PCB 1. A component groove for fixing the PIN needle is further arranged on one side of the stepped groove 301, which includes a first rectangular groove 304 for fixing the PIN needle terminal and a second rectangular groove 305 located on one side of the first rectangular groove and connected with the first rectangular groove. More specifically, a plurality of through demolding holes 303 are arranged on the bottom of the positioning groove 302 in the embodiment, and the plurality of demolding holes 303 are arranged at intervals around the center of the magnetic core assembly 2, so that the product can be uniformly stressed when cooperating with the demolding base 4 for demolding, thereby avoiding secondary damage to the finished product.

[0029] As shown in the figure, Figure 3 As shown in the figure, the cross-sectional view of the positioning groove 302 and the stepped groove 301 is shown, and the slot of the stepped groove is provided with an opening chamfer 306, which can greatly improve the smoothness of the assembly of the PCB 1.

[0030] As shown in the figure, Figure 4 As shown in the figure, the cross-sectional view of the component groove is shown, and the length direction cross section of the second rectangular groove 305 is V-shaped structure, thereby facilitating the positioning of the PIN needle tip part which is not completely straight.

[0031] As shown in the figure, Figure 5 As shown in the figure, the demolding base 4 provided in the embodiment includes a base 401 and a ejector pin 402 fixed on the base 401. In the embodiment, the ejector pin 402 includes a vertical rod and a circular arc head arranged on the top of the vertical rod, which can better position into the demolding hole 303, and the circular arc head can also reduce the risk of secondary damage to the contact surface of the product when lifting the finished product.

[0032] In actual use, first, the positioning base is taken out, then the magnetic core assembly is placed into the positioning groove in the positioning base for fixing, then the PIN needle terminal is fixed in the first rectangular groove, and the PIN needle tip end is positioned one by one by using the second rectangular groove, finally, the PCB is covered on the magnetic core assembly and the PIN needle against the stepped groove, and then the subsequent welding work is performed.

[0033] When the welding is completed, the positioning base is lifted, the demolding holes at the bottom of the positioning base are aligned with the ejector pins on the demolding base, and then the product is slowly ejected from the positioning base, thereby obtaining a standardized generated current sensor.

[0034] In summary, the assembly size is positioned by the tooling fixture, the stability of the product assembly size is increased (the fitting gap approaches the ideal value), and the stability of the magnetic field is further increased. Finally, the linearity of the sensor tends to be stable.

[0035] In addition, the terms "upper", "lower", "inner", "outer", "front", "back" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Unless otherwise specified, the relative steps, numerical expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the utility model.

[0036] Of course, the above only describes specific embodiments of the utility model, and does not limit the scope of the utility model. Equivalent changes or modifications made in accordance with the structure, features and principles described in the patent application scope of the utility model should be included in the patent application scope of the utility model.

[0037] Finally, it should be noted that the above-described embodiments are only specific embodiments of the utility model, which are used to illustrate the technical solutions of the utility model, but not to limit it. The protection scope of the utility model is not limited to this. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments within the technical range disclosed by the utility model, or make equivalent replacement to some technical features. The modification, change or replacement does not make the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the utility model, and should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A current sensor welding fixture, characterized by, The application relates to a positioning base and a demolding base, wherein the positioning base is provided with a positioning groove in contact with the outer circumferential surface of a magnetic core assembly, a stepped groove matched with a PCB is arranged around the opening of the positioning groove, and an assembly groove for fixing a PIN needle is arranged on one side of the stepped groove; The height of the sum of the positioning groove and the stepped groove is equal to the sum of the axial height of the magnetic core assembly and the thickness of the PCB; The demolding base is provided with a vertical upward ejector pin, the bottom of the positioning base is provided with a demolding hole for the ejector pin, and the ejector pin pushes out the current sensor after assembly and welding through the demolding hole.

2. The current sensor welding fixture of claim 1, wherein, The opening chamfer of the stepped groove is provided.

3. The current sensor welding fixture of claim 2, wherein, The range of the opening chamfer is 30-45 DEG.

4. The current sensor welding fixture of claim 1, wherein, The assembly groove comprises a first rectangular groove for fixing the PIN needle terminal and a second rectangular groove located on one side of the first rectangular groove and connected with the first rectangular groove, and the second rectangular groove is used for fixing the needle tip end of the PIN needle.

5. The current sensor welding fixture of claim 4, wherein, The length direction section of the second rectangular groove is a V-shaped structure.

6. The current sensor welding fixture of claim 1, wherein, The demolding hole is provided with a plurality of demolding holes which are arranged around the bottom of the positioning groove.

7. The current sensor welding fixture of claim 1, wherein, One end of the ejector pin for pushing out the current sensor is a circular arc head.

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