A magnetic core broken end welding device

Abstract

The present invention discloses a magnetic core broken end welding device, comprising a winding mechanism and a welding mechanism, wherein the winding mechanism comprises a fixed shaft sleeve, a rotating shaft sleeve and a telescopic shaft, wherein an end plate is installed at an interval at one end of the rotating shaft sleeve away from the telescopic drive member, and a winding shaft is installed at the other end of the telescopic shaft away from the telescopic drive member, wherein the winding shaft comprises a connecting sleeve, and a winding shaft is installed on the side of the connecting sleeve close to the end plate, wherein a slot is provided on the side wall of the winding shaft, the slot is connected to the interior of the connecting sleeve, and a pressure block is movably installed in the slot, wherein one side of the pressure block and the side wall of the slot form an insertion interface, and the other side of the pressure block is provided with a first wedge block, and the first wedge block and the side wall of the slot form a welding port of a hollow structure. By providing a movable pressure block at the winding shaft, the inner and outer broken ends of the magnetic core can be welded by a welding mechanism, thereby simplifying the welding structure at the winding shaft and reducing the design difficulty and production and maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent welding, and in particular to a magnetic core break welding device. Background Art

[0002] Wound magnetic cores are made from highly permeable metal strip and are widely used in the magnetic flux collection circuits of current sensors. After the core is wound, the inner and outer ends are welded together to prevent deformation and loosening of the wound core.

[0003] The existing magnetic core broken end welding device requires two sets of welding devices to weld the inner and outer broken ends of the magnetic core respectively, which makes the structure of the winding shaft more complicated and increases the difficulty of design, manufacturing and maintenance.

[0004] Based on the above technical problems, the present application proposes a magnetic core broken end welding device. Summary of the Invention

[0005] The purpose of the present invention is to provide a magnetic core broken end welding device to solve the technical problems mentioned in the background technology. The purpose of the present invention is achieved through the following technical solutions:

[0006] 7. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod is pivotally connected to said linking rod. said linking rod is pivotally connected to said linking rod. The cam is secured to the side of the workbench with a first end in contact with the first end of the linking rod and a second end in contact with the first spring, the second end of the linking rod being secured to the side of the workbench with a first end in contact with the first spring.

[0007] Furthermore, the length of the rotating sleeve is greater than that of the fixed sleeve, bearings are installed at both ends of the fixed sleeve, the rotating sleeve is rotatably installed in the fixed sleeve through the bearings, and both ends of the rotating sleeve extend out of the fixed sleeve; the rotating driving member is installed on one side of the fixed sleeve, and the driving shaft of the rotating driving member is connected to the rotating sleeve through the transmission assembly.

[0008] Furthermore, a guide groove is provided on the inner wall of the rotating sleeve, and the guide groove is arranged along the length direction of the rotating sleeve; a guide bar is fixed to the side wall of the telescopic shaft, and the guide bar is slidably arranged in the guide groove.

[0009] Furthermore, the telescopic driving member includes a driving arm, a first telescopic member and a second telescopic member, the first telescopic member and the second telescopic member are arranged side by side on one side of the fixed sleeve, and the second telescopic member is located on the side of the first telescopic member close to the fixed sleeve; the driving arm is pivotally connected between the telescopic shaft and the first telescopic member through a pin; an axis head is installed at one end of the telescopic shaft close to the telescopic driving member, and a second spring is installed between the axis head and the rotating sleeve; when the first telescopic member and the second telescopic member are both in a retracted state, the telescopic shaft is in a unloading position under the action of the second spring; when the first telescopic member is extended and abuts against the driving arm, the other end of the driving arm abuts against the telescopic shaft, so that the telescopic shaft is in a loading position; when the second telescopic member is extended and abuts against the driving arm, the other end of the driving arm abuts against the telescopic shaft, so that the telescopic shaft is in a welding position.

[0010] Furthermore, a universal ball is provided at the connection between the driving arm and the telescopic shaft; and the telescopic length of the second telescopic member is greater than or equal to the telescopic length of the first telescopic member.

[0011] Furthermore, a latch is fixed to the lower portion of the side wall of the slot, a slot for the latch to cooperate with is opened on the side wall of the pressure block, the latch is inserted into the slot, and a third spring is sleeved on the latch.

[0012] Furthermore, one end of the connecting sleeve close to the winding shaft is in a frustum shape.

[0013] Furthermore, the first moving assembly includes a first fixed seat, a first moving seat and a first moving member, the first moving member is installed at the upper end of the first fixed seat, the first moving seat is connected to the first moving member, the welding gun is fixed on the first moving seat, and the first moving member drives the welding gun to move back and forth up and down.

[0014] Furthermore, the welding mechanism also includes a second moving component, which includes a second fixed seat and a second moving member, the second moving member is fixed to the side of the second fixed seat, the first fixed seat is connected to the second moving member, and the second moving member drives the first fixed seat to move back and forth along the length direction of the winding shaft.

[0015] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0016] 1. By setting up a reel with a hollow welding position, a welding mechanism can be used to weld the inner broken end of the magnetic core at the welding position at the beginning of reeling, and weld the outer broken end of the magnetic core after reeling, which simplifies the welding structure of the reel, reduces the design difficulty and production and maintenance costs;

[0017] 2. By setting a movable pressing block in the card slot to press and fix the broken end inside the magnetic core, and using a welding mechanism to weld the inner and outer broken ends of the magnetic core, the size of the reel is reduced, so that the magnetic core with a smaller inner diameter can be automatically welded, which increases the applicability of the welding device;

[0018] 3. The first telescopic member and the second telescopic member respectively control the swing amplitude of the driving arm to achieve the switching of different working positions of the telescopic axis. The structure is simple, the action is reliable, and the equipment investment cost is reduced.

[0019] 4. The welding gun is controlled to move along the length direction of the winding shaft by the second moving component. The position of the welding gun can be adjusted according to the different thicknesses of the magnetic core, thereby improving the applicability of the welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0022] Figure 2 This is a three-dimensional diagram of the winding mechanism of an embodiment of the present application;

[0023] Figure 3 This is a top view of the winding mechanism according to an embodiment of the present application;

[0024] Figure 4 This is a cross-sectional view of the winding mechanism according to an embodiment of the present application;

[0025] Figure 5 This is a three-dimensional diagram of the winding shaft according to an embodiment of the present application;

[0026] Figure 6 This is a cross-sectional view of the winding shaft according to an embodiment of the present application;

[0027] Figure 7 for Figure 6 A partial enlarged view of

[0028] Figure 8 This is a schematic diagram of the welding mechanism structure of an embodiment of the present application.

[0029] Symbols in the accompanying drawings: 100, machine table; 101, vertical plate; 102, guide trough; 103, collecting tray; 200, unwinding mechanism; 300, tensioning mechanism; 400, feeding mechanism; 500, cutting mechanism; 600, winding mechanism; 610, fixed shaft sleeve; 611, bearing; 620, rotating shaft sleeve; 621, end plate; 622, guide groove; 630, telescopic shaft; 631, shaft head; 632, second spring; 633, guide bar; 640, winding shaft; 641, connecting sleeve; 642, winding shaft; 6421, slot; 6422, latch; 643, guide rod; 644, connecting rod; 645, driving rod; 646 51. Second wedge block; 646. First spring; 647. Pressing block; 6471. First wedge block; 6472. Slot; 648. Third spring; A. Plug interface; B. Welding position; 650. Rotating drive member; 660. Transmission assembly; 670. Telescopic drive member; 671. Drive arm; 672. First telescopic member; 673. Second telescopic member; 700. Welding mechanism; 710. Welding gun; 720. First moving assembly; 721. First fixed seat; 722. First moving seat; 723. First moving member; 730. Second moving assembly; 731. Second fixed seat; 732. Second moving member; 800. Clamping mechanism. DETAILED DESCRIPTION

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] like Figure 1The device for welding broken magnetic cores includes a machine platform 100, on which a vertical plate 101 is mounted. The vertical plate 101 is equipped with an unwinding mechanism 200, a tensioning mechanism 300, a feeding mechanism 400, a cutting mechanism 500, a winding mechanism 600, a welding mechanism 700, and a pressing mechanism 800. A strip is placed on the unwinding mechanism 200. The end of the strip passes through the tensioning mechanism 300, the feeding mechanism 400, and the cutting mechanism 500, and is then wound onto the winding mechanism 600. The tensioning mechanism 300 adjusts the tension of the strip to adjust the winding density of the magnetic core. The feeding mechanism 400 clamps the strip and feeds it to the cutting mechanism 500 for cutting. The end of the strip is then conveyed to the winding mechanism 600, which winds the strip into a magnetic core of a predetermined size. The pressing mechanism 800 compresses the core during winding. The welding mechanism 700 is used to weld the inner and outer ends of the magnetic core to prevent the core from becoming loose after winding. The wound magnetic core rolls from the guide chute 102 to the collection tray 103. The structures and principles of the unwinding mechanism 200, tensioning mechanism 300, feeding mechanism 400, cutting mechanism 500, and pressing mechanism 800 are all conventional and will not be elaborated upon here.

[0032] like Figures 1-4 As shown, the winding mechanism 600 includes a fixed sleeve 610, a rotating sleeve 620, a telescopic shaft 630, a winding shaft 640, a rotating drive 650, a transmission assembly 660, and a telescopic drive 670. The fixed sleeve 610 is mounted on the machine 100. Bearings 611 are mounted at both ends of the fixed sleeve 610. The rotating sleeve 620 is rotatably mounted within the fixed sleeve 610 via the bearings 611. Both ends of the rotating sleeve 620 extend beyond the ends of the fixed sleeve 610. End plates 621 are installed at intervals at the front end of the rotating sleeve 620. The center of the end plates 621 has an axial hole. The end plates 621 are connected to the rotating sleeve 620 via bolts, allowing them to be replaced according to the size of the magnetic core. The rotary drive member 650 is a servo motor. The rotary drive member 650 is mounted on the left side of the fixed sleeve 610 via a motor bracket 651. The drive shaft of the rotary drive member 650 is connected to the rear end of the rotating sleeve 620 via a transmission assembly 660. The rotary drive member 650 drives the rotating sleeve 620 to rotate synchronously via the transmission assembly 660. The transmission assembly 660 is a synchronous wheel assembly that enables precise adjustment of the rotating sleeve 620.

[0033] like Figure 2 、 Figure 4As shown, a telescopic shaft 630 is slidably mounted within the rotating sleeve 620, allowing reciprocating movement along the axis of the rotating sleeve 620. A winding shaft 640 is mounted at the front end of the telescopic shaft 630, and a shaft head 631 is mounted at the rear end of the telescopic shaft 630. A second spring 632 is mounted between the shaft head 631 and the rotating sleeve 620. The second spring 632 pushes the telescopic shaft 630 rearward, causing the winding shaft 640 to move rearward to the unloading position, i.e., the winding shaft 640 is retracted behind the end plate 621. A guide groove 622 is defined at the bottom of the inner wall of the rotating sleeve 620, extending along the length of the rotating sleeve 620. A guide bar 633 is fixed to the lower end of the side wall of the telescopic shaft 630, which slides within the guide groove 622, enabling the telescopic shaft 630 to rotate synchronously with the rotating sleeve 620.

[0034] like Figure 2 、 Figure 3 、 Figure 4 As shown, the telescopic drive member 670 includes a drive arm 671, a first telescopic member 672, and a second telescopic member 673. The first and second telescopic members 672 and 673 are mounted side by side on the right side of the fixed sleeve 610, with the first telescopic member 672 located to the right of the second telescopic member 673. A pin is vertically mounted between the second telescopic member 673 and the telescopic shaft 630, located near the side of the telescopic shaft 630. The drive arm 671 is pivotally connected to the pin, enabling horizontal rotation of the drive arm 671. When the first telescopic member 672 extends, it pushes the drive arm 671 to rotate, pushing the telescopic shaft 630 forward to the loading position. When the second telescopic member 673 extends, it further pushes the drive arm 671 to rotate, further pushing the telescopic shaft 630 forward to the welding position. When both the first and second telescopic members 672 and 673 retract, the telescopic shaft 630 moves backward to the unloading position under the action of the second spring 632. Preferably, a universal ball is installed at the contact end of the driving arm 671 and the telescopic shaft 630, so as to reduce the wear between the driving arm 671 and the telescopic shaft 630.

[0035] Both the first telescopic member 672 and the second telescopic member 673 are pneumatic cylinders, and the telescopic travel of the second telescopic member 673 is equal to or greater than that of the first telescopic member 672. By pushing the drive arm 671 at different positions, the two telescopic members can achieve different displacements of the telescopic shaft 630, thereby placing the telescopic shaft 630 at different working positions. This design is simple in structure, responsive, low-cost, and easy to install and maintain.

[0036] like Figure 4 、 Figure 5 、 Figure 6As shown, the winding shaft 640 includes a connecting sleeve 641. A reeling shaft 642 is mounted on the right end of the connecting sleeve 641. A slot 6421 is defined in the sidewall of the reeling shaft 642, which communicates with the interior of the connecting sleeve 641. A guide rod 643 is slidably mounted within the connecting sleeve 641. The guide rod 643 is shorter than the connecting sleeve 641. A connecting rod 644 is mounted on the left end of the guide rod 643. The connecting rod 644 is fixedly connected to the telescopic shaft 630, with a distance between the telescopic shaft 630 and the connecting sleeve 641 allowing the guide rod 643 to move. A driving rod 645 is fixed to the right end of the guide rod 643. A first spring 646 is attached to the outer surface of the driving rod 645, which is used to push the guide rod 643 away from the reeling shaft 642. The driving rod 645 extends into the slot 6421. A plurality of second wedge blocks 6451 are fixed to the side of the driving rod 645.

[0037] like Figure 5 、 Figure 6 、 Figure 7 As shown, a pressure block 647 is movably installed in the slot 6421. The pressure block 647 is located on the side of the driving rod 645 where the second wedge block 6451 is fixed. The pressure block 647 and the side of the slot 6421 away from the driving rod 645 form an insertion interface A. A first wedge block 6471 is fixed on the side of the pressure block 647 adjacent to the driving rod 645. The first wedge block 6471 cooperates with the second wedge block 6451. When the guide rod 643 pushes the driving rod 645 to move to the right, the second wedge block 6451 pushes the first wedge block 6471, causing the pressure block 647 to move toward the side of the insertion interface A, clamping the inner broken end of the strip in the insertion interface A. At the same time, a hollow welding position B is formed between the first wedge block 6471 and the slot 6421.

[0038] like Figure 5 、 Figure 6 、 Figure 7 As shown, two latches 6422 are installed at the lower portion of the side wall of the slot 6421. Two slots 6472 are provided on the side of the pressure block 647 to match the latches 6422. A third spring 648 is sleeved on the latch 6422, which pushes the pressure block 647 toward the drive rod 645. When the guide rod 643 pulls the drive rod 645 to the left, the first wedge block 6471 picks up the support of the second wedge block 6451, and the pressure block 647, pushed by the third spring 648, moves toward the drive rod 645, opening the insertion port A and facilitating the unloading of the magnetic core.

[0039] Preferably, the end of the connecting sleeve 641 close to the winding shaft 642 is in a frustum shape, and the shape of the shaft hole matches the shape of the connecting sleeve 641 , so that the end plate 621 can guide and position the winding shaft 640 .

[0040] like Figure 1 、 Figure 7As shown, the welding mechanism 700 includes a welding gun 710 , a first moving assembly 720 , and a second moving assembly 730 . The welding gun 710 is mounted on the first moving assembly 720 , and the first moving assembly 720 is mounted on the second moving assembly 730 .

[0041] like Figure 1 、 Figure 7 As shown, the second moving assembly 730 includes a second fixed seat 731 and a second moving member 732. The second fixed seat 731 is mounted on the vertical plate 101 and is located directly above the winding shaft 642. The second moving member 732 is fixed to the rear side of the second fixed seat 731. The first moving assembly 720 includes a first fixed seat 721, a first moving seat 722 and a first moving member 723. The first fixed seat 721 is connected to the moving end of the second moving member 732. The first moving member 723 is mounted on the upper end of the first fixed seat 721. The first moving seat 722 is connected to the moving end of the first moving member 723. The welding gun 710 is vertically mounted on the first moving seat 722. The first moving member 723 drives the first moving seat 722 to move up and down, driving the welding gun 710 to move back and forth up and down, so that the welding gun 710 approaches or moves away from the magnetic core. The second moving member 732 drives the first fixed seat 721 to move along the length direction of the winding shaft 742, thereby adjusting the position of the welding gun 710 in the thickness direction of the magnetic core to adapt to welding magnetic cores of different thicknesses. The first moving member 723 and the second moving member 732 can be cylinders or electric push rods.

[0042] Preferably, a buffer spring is installed between the welding gun 710 and the first movable seat 722 to reduce the impact of the welding gun 710 on the magnetic core when it descends, thereby ensuring the quality of the magnetic core.

[0043] The working principle of the embodiment of this application is as follows:

[0044] When the first telescopic member 672 extends, it pushes the drive arm 671 to rotate, pushing the telescopic shaft 630 forward to the loading position. The reel 642 now extends out of the end plate 621, and the insertion port A is open. The end of the strip can now be fed into the insertion port A via the feeding mechanism 400.

[0045] When the second telescopic member 673 is extended, the second telescopic member 673 further pushes the driving arm 671 to rotate, and continues to push the telescopic shaft 630 forward to the welding position. At this time, the driving rod 645 pushes the pressure block 647 to move toward the plug-in interface A, clamping the end of the strip, and at the same time, the hollow structure of the welding port B is enlarged. After the winding mechanism 600 winds one circle, the welding mechanism 700 welds the inner broken end of the magnetic core at the welding port B. After the inner broken end of the magnetic core is welded, the winding mechanism 600 continues to wind to the set size and then cuts it through the cutting mechanism 500. The welding mechanism 700 welds the outer ring of the magnetic core while winding.

[0046] The hollowed-out welding opening B allows welding of the inner core ends from the outside of the core during the initial winding process, allowing the reel 642 to be smaller and adaptable to welding cores with smaller inner diameters. Using the clamp 647 to hold the inner core ends reduces their length, avoids wasted material, and reduces the manufacturing cost of the core.

[0047] When both the first and second telescopic members 672 and 673 are retracted, the telescopic shaft 630 moves backward to the loading position under the action of the second spring 632. The guide rod 643 then pulls the drive rod 645 to the left, the first wedge block 6471 picks up the support of the second wedge block 6451, and the pressure block 647, pushed by the third spring 648, moves toward the drive rod 645, opening the insertion port A. The telescopic shaft 630, under the action of the second spring 632, moves further backward to the unloading position, and the reel 642 retracts to the rear side of the end plate 621, removing the welded magnetic core.

[0048] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0049] 1. By setting up a reel with a hollow welding position, a welding mechanism can be used to weld the inner broken end of the magnetic core at the welding position at the beginning of reeling, and weld the outer broken end of the magnetic core after reeling, which simplifies the welding structure of the reel, reduces the design difficulty and production and maintenance costs;

[0050] 2. By setting a movable pressing block in the card slot to press and fix the broken end inside the magnetic core, and using a welding mechanism to weld the inner and outer broken ends of the magnetic core, the size of the reel is reduced, so that the magnetic core with a smaller inner diameter can be automatically welded, which increases the applicability of the welding device;

[0051] 3. The first telescopic member and the second telescopic member respectively control the swing amplitude of the driving arm to achieve the switching of different working positions of the telescopic axis. The structure is simple, the action is reliable, and the equipment investment cost is reduced.

[0052] 4. The welding gun is controlled to move along the length direction of the winding shaft by the second moving component. The position of the welding gun can be adjusted according to the different thicknesses of the magnetic core, thereby improving the applicability of the welding equipment.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0056] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A magnetic core broken end welding device, characterized in that: The retractable shaft is movably mounted on the fixed shaft sleeve, and the retractable shaft sleeve is movably connected to the rotating shaft sleeve by a transmission assembly; the retractable shaft sleeve is slidably mounted on the rotating shaft sleeve, and the retractable shaft sleeve is movably connected to the rotating shaft sleeve. The retractable shaft sleeve is used to drive the retractable shaft to reciprocate along the axial direction of the rotating shaft sleeve, so that the retractable shaft is located in the unloading position, loading position or welding position; the rotating shaft sleeve is spaced apart from the telescopic driving member by an end plate, and the end plate is provided with an axis hole; the retractable shaft is installed at one end of the retractable driving member away from the telescopic driving member, and the retractable shaft comprises a connecting sleeve, and a winding shaft is installed on a side of the connecting sleeve close to the end plate The cam is secured to the side panel with an angular channel formed between a first end of the diagonal channel and a second end of the diagonal channel, and the cam is secured to the side panel with an angular channel formed between the first and second end of the diagonal channel.

2. A magnetic core broken end welding device according to claim 1, characterized in that: The length of the rotating sleeve is greater than that of the fixed sleeve, and bearings are installed at both ends of the fixed sleeve. The rotating sleeve is rotatably installed in the fixed sleeve through the bearings, and both ends of the rotating sleeve extend out of the fixed sleeve; the rotating driving member is installed on one side of the fixed sleeve, and the driving shaft of the rotating driving member is connected to the rotating sleeve through the transmission assembly.

3. The magnetic core broken end welding device according to claim 1, characterized in that: A guide groove is formed on the inner wall of the rotating sleeve and is arranged along the length direction of the rotating sleeve; a guide bar is fixed on the side wall of the telescopic shaft and is slidably arranged in the guide groove.

4. The magnetic core broken end welding device according to claim 1, characterized in that: The telescopic driving member includes a driving arm, a first telescopic member and a second telescopic member, the first telescopic member and the second telescopic member are arranged side by side on one side of the fixed sleeve, and the second telescopic member is located on the side of the first telescopic member close to the fixed sleeve; the driving arm is pivotally connected between the telescopic shaft and the first telescopic member by a pin; an axis head is installed at one end of the telescopic shaft close to the telescopic driving member, and a second spring is installed between the axis head and the rotating sleeve; when the first telescopic member and the second telescopic member are both in a retracted state, the telescopic shaft is in a unloading position under the action of the second spring; when the first telescopic member is extended and abuts against the driving arm, the other end of the driving arm abuts against the telescopic shaft, so that the telescopic shaft is in a loading position; when the second telescopic member is extended and abuts against the driving arm, the other end of the driving arm abuts against the telescopic shaft, so that the telescopic shaft is in a welding position.

5. The magnetic core broken end welding device according to claim 4, characterized in that: A universal ball is provided at the connection between the driving arm and the telescopic shaft; the telescopic length of the second telescopic member is greater than or equal to the telescopic length of the first telescopic member.

6. The magnetic core broken end welding device according to claim 1, characterized in that: A latch is fixed at the lower portion of the side wall of the slot, a slot for the latch to cooperate with is opened on the side wall of the pressure block, the latch is inserted in the slot, and a third spring is sleeved on the latch.

7. The magnetic core broken end welding device according to claim 1, characterized in that: One end of the connecting sleeve close to the winding shaft is in a frustum shape.

8. The magnetic core broken end welding device according to claim 1, characterized in that: The first moving assembly includes a first fixed seat, a first moving seat and a first moving member. The first moving member is installed at the upper end of the first fixed seat. The first moving seat is connected to the first moving member. The welding gun is fixed on the first moving seat. The first moving member drives the welding gun to move back and forth up and down.

9. The magnetic core broken end welding device according to claim 8, characterized in that: The welding mechanism also includes a second moving assembly, which includes a second fixed seat and a second moving member. The second moving member is fixed to the side of the second fixed seat, the first fixed seat is connected to the second moving member, and the second moving member drives the first fixed seat to move back and forth along the length direction of the winding shaft.

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