A coil winding device for mutual inductor production

Abstract

The present invention relates to the technical field of mutual inductor production, and more specifically, to a coil winding device for mutual inductor production, comprising a frame, a winding wheel, the winding wheel being rotatably supported on the frame by a plurality of support wheels, and the winding wheel having a C-shaped notch for accommodating an iron core. The winding wheel comprises a center ring and side rings located on either side of the center ring, the side rings being coaxial with the center ring and rotatably arranged relative to each other, the peripheral wall of the center ring being used for winding copper wire, and one side ring being provided with a threading ring for threading the end of the copper wire; a tensioning assembly, the tensioning assembly being used to clamp the copper wire between the iron core and the threading ring; a magnetic powder brake, the magnetic powder brake being connected to the support wheels and providing resistance to the center ring through the support wheels to tension the copper wire; and a drive assembly, the drive assembly being used to drive the side rings to rotate and wind the copper wire around the iron core. The present invention uses the magnetic powder brake to provide resistance to the center ring of the winding wheel, thereby controlling the tension of the copper wire and improving the winding quality of the copper wire around the iron core.

Description

Technical Field

[0001] The present invention relates to the technical field of mutual inductor production, and in particular to a coil winding device for mutual inductor production. Background Art

[0002] A current transformer is an electrical instrument based on the principle of electromagnetic induction, primarily consisting of a closed iron core and windings, used to measure current. During operation, the secondary circuit of a current transformer is always closed and operates in a near-short-circuit state to ensure the safe operation of the measuring instrument and protective circuits. Coil winding is a crucial step in the current transformer production process. Because current transformers require high precision and stability, the coil winding process requires strict control of various parameters, such as the number of turns, winding tension, and winding speed.

[0003] The Chinese patent document with authorization announcement number CN118609991B discloses a current transformer coil winding device, including a base and a fixed plate, the outer wall of the fixed plate and the base are a whole, a motor is installed on one outer wall of the fixed plate, a first wheel groove shaft and a second wheel groove shaft are respectively installed on the inner wall of the fixed plate, a transmission belt is installed on the inner wall of the first wheel groove shaft and the second wheel groove shaft, the upper end of the fixed plate is fixedly connected to the mounting frame, the outer wall of one end of the mounting frame is fixedly connected to the rotating shaft, the outer wall of the rotating shaft is provided with a roller, two semi-ring plates are installed between the transmission belt and the roller, the two semi-ring plates are connected and fixed by bolts and fixing plates, the two semi-ring plates are located inside the mounting frame, a clamping arm is installed at one end of the mounting frame, the two semi-ring plates are rotatably arranged on the clamping arm, used to limit the movable position of the semi-ring plates, the inner wall of one of the semi-ring plates is provided with a notch, the inner walls of the semi-ring plates on both sides close to the notch are provided with slots, the inner wall of the slot is provided with a latch, and a wire wheel is installed between the two latches.

[0004] The reel is pre-wound with copper wire. Then, two half-ring plates are joined together, threading them from either side of the core to the center. Next, one end of the copper wire is wrapped around the core, and the half-ring plates are rotated. As the half-ring plates rotate, the reel mounted on them also rotates, driving the copper wire around the core. However, during the winding process, the copper wire experiences varying tensions. In particular, the reel cannot rotate evenly around the core, causing its rotation speed to fluctuate, further reducing the winding quality of the copper wire. Summary of the Invention

[0005] The present invention provides a coil winding device for mutual inductor production, aiming to solve the problem of poor winding quality caused by difficulty in controlling the tension of copper wire during the winding process in the related art.

[0006] The present invention provides a coil winding device for mutual inductor production, comprising a frame and also comprising: a winding wheel, which is rotatably supported on the frame by a plurality of supporting wheels, and has a C-shaped notch for placing an iron core, the winding wheel comprises a middle ring and side rings located on both sides of the middle ring, the side rings being coaxial with the middle ring and rotatably arranged relative to each other, the peripheral wall of the middle ring being used for winding copper wire, and a threading ring for threading the end of the copper wire being provided on one side ring; a tensioning assembly, which is used for clamping the copper wire between the iron core and the threading ring; a magnetic powder brake, which is connected to the supporting wheel and provides resistance to the middle ring through the supporting wheel to tension the copper wire; and a driving assembly, which is used for driving the side rings to rotate and wind the copper wire around the iron core.

[0007] The winding reel rotates and is supported on the frame by multiple support wheels. Several turns of copper wire are first wound on the reel before being transferred to the iron core. The reel features a C-shaped notch, allowing the iron core to be conveniently positioned for winding without opening the main reel structure. The reel consists of a center ring and side rings, with the copper wire wound around the center ring's circumference. Threading rings are mounted on the side rings. When the side rings rotate under the drive assembly, the copper wire is also drawn by the threading rings. This pulls the center ring in turn. The magnetic powder brake provides resistance to the center ring, creating a certain tension in the copper wire. As the reel rotates, the copper wire is gradually wound around the iron core. Simultaneously, the center ring rotates relative to the side rings, gradually unwinding the copper wire from the center ring. The resistance provided by the magnetic powder brake keeps the copper wire taut, controlling the tension and improving winding quality.

[0008] Preferably, a slide groove is provided on one surface of the side ring close to the middle ring, the cross section of the slide groove is T-shaped and the slide groove is arranged along the arc direction of the side ring, a guide ring is provided in the slide groove, the guide ring is fixed to the middle ring by bolts, and the guide ring is arranged to be composed of multiple arc structures, and the length of each arc structure is less than the length of the C-shaped opening of the side ring.

[0009] The effect is that the side rings are provided with a chute, and within the chute is a guide ring composed of multiple arc-shaped structures. During installation, each arc structure can be bolted to the middle ring one by one, and as each arc structure is connected, the side ring is also connected to the guide ring, making it easier to install the side rings on the middle ring.

[0010] Preferably, ribs are provided on the inner peripheral wall of the middle ring, and an annular groove is provided on the peripheral wall of the supporting wheel, and the ribs are supported in the annular groove.

[0011] Preferably, a through hole is opened at the edge of the winding wheel corresponding to the position of the threading ring, and a detachable guide block is provided in the through hole. The guide block is arranged in a V shape close to one end of the threading ring. The guide block is inserted into the through hole and pushes the copper wire into the threading ring.

[0012] The effect is that when the copper wire needs to be wound on the winding reel, the detachable guide block can be removed. Then, when the winding length reaches the desired length, the guide block is inserted through the through hole. The guide block can guide the end of the copper wire into the threading ring, thereby facilitating the arrangement of the copper wire so that it can be subsequently wound onto the iron core.

[0013] Preferably, the driving assembly includes two gear sets for driving the side ring to rotate, and a synchronization assembly is provided between the two gear sets. The synchronization assembly is used to make the two gear sets rotate synchronously, and the distance between the two gear sets is greater than the width of the C-shaped opening of the winding wheel.

[0014] The effect is that a synchronization assembly is provided between the two gear sets, both of which are connected to the winding wheel, thereby ensuring that either gear set in the drive assembly can drive the winding wheel. This design ensures that the winding wheel with a C-shaped opening can rotate circumferentially and the two gear sets are always synchronized, so that the initial engagement of one of the two gear sets with the winding wheel can be more accurate.

[0015] Preferably, another synchronization component is provided between at least two of the support wheels, and a transmission component is provided between a support wheel connected to the synchronization component and the gear set; when the copper wire is wound on the winding wheel, the drive component simultaneously drives the middle ring and the side ring to rotate through the transmission component.

[0016] Preferably, the transmission assembly includes a transmission gear 1, a transmission gear 2, a transmission belt and a one-way bearing. The transmission gears are coaxially fixed on the gear set, the transmission gear 2 is coaxially arranged on the support wheel through the one-way bearing, the transmission belt is connected between the transmission gear 1 and the transmission gear 2, and the transmission ratio of the transmission gear 1 and the transmission gear 2 is used to make the middle ring and the side ring rotate at the same speed when winding the copper wire.

[0017] The effect is that when copper wire needs to be wound around the middle ring, the drive assembly drives the support wheel to rotate through transmission gear 1, transmission gear 2, transmission belt, and one-way bearing, and the support wheel then drives the middle ring to rotate. At this time, the drive assembly also synchronously drives the side rings to rotate, allowing the middle ring and side rings to rotate simultaneously at the same speed. This design can reduce the friction between the copper wire and the winding wheel during the winding process, thereby reducing the risk of damage to the copper wire. When the drive motor rotates in the opposite direction, due to the setting of the one-way bearing, the drive assembly will not drive the middle ring to rotate through the transmission assembly. At this time, the middle ring can provide resistance under the action of the magnetic powder brake to tension the copper wire.

[0018] Preferably, the gear set includes two coaxially fixed driving gears, a gear ring is coaxially fixed on the side ring, and the gear rings on the two side rings are respectively meshed with the two driving gears in a one-to-one correspondence.

[0019] The effect is that the gear set includes two driving gears, and the two driving gears correspond to the ring gears on the two side rings respectively, so that the two completely separately arranged side rings can achieve synchronous rotation.

[0020] Preferably, the tensioning assembly includes two opposing clamps, the sides of the clamps close to each other are arc-shaped surfaces, the plane between the two clamps is aligned with the side of the winding wheel where the threading ring is set, and a mounting plate is set at the position corresponding to one of the clamps, and multiple springs are set between the mounting plate and the clamps.

[0021] The effect is that the side of the clamping plates that approaches each other is curved, allowing the copper wire to pass more easily between the two clamping plates during the winding process. At the same time, the copper wire is clamped by a spring between the mounting plate and the clamping plates, and the magnetic powder brake provides tension on the copper wire to ensure the winding quality.

[0022] Preferably, the frame is provided with a mounting assembly, which includes a movable seat and three rubber wheels mounted on the movable seat. The distance between the three rubber wheels is adjusted to place iron cores of different sizes. The movable seat is slidably connected to the frame, and the position of the movable seat is adjusted to allow the winding wheel to pass through the middle of the iron core.

[0023] The effect is that the distance between the three rubber wheels can be adjusted, thereby facilitating the installation of iron cores of different sizes on the mounting assembly to meet the production requirements of different coils.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are:

[0025] The present invention utilizes a wire threading ring mounted on the side ring. When the side ring rotates under the action of a drive assembly, the copper wire is also pulled by the wire threading ring. A magnetic powder brake provides resistance to the middle ring, which exerts a certain tension on the copper wire. As the winding reel rotates, the copper wire is gradually wound onto the iron core. Simultaneously, the middle ring rotates relative to the side ring, gradually unwinding the copper wire from the middle ring. The resistance provided by the magnetic powder brake maintains tension on the copper wire, thereby improving winding quality. Both gear sets are connected to the winding reel, ensuring that either gear set in the drive assembly can drive the reel, ensuring circumferential rotation of the reel with a C-shaped opening. The drive assembly also synchronously drives the side ring, allowing the middle and side rings to rotate simultaneously at the same speed. This reduces friction between the copper wire and the reel during winding, thereby minimizing the risk of copper wire damage. When the drive motor rotates in the reverse direction, the one-way bearing prevents the drive assembly from driving the middle ring through the transmission assembly. The magnetic powder brake then acts as a resistance to the center ring, tightening the copper wire. The forward and reverse rotations of the drive motor allow the copper wire to be wound onto the reel or transferred to the iron core. The distance between the three rubber wheels is adjustable, allowing for easy installation of iron cores of varying sizes on the assembly to meet diverse coil production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a coil winding device for mutual inductor production according to the present invention;

[0027] Figure 2 Schematic diagram of the arrangement of support wheels in an embodiment of the present invention;

[0028] Figure 3 2 is a schematic structural diagram of a winding wheel according to an embodiment of the present invention;

[0029] Figure 4 yes Figure 1 A partial enlarged view of part A;

[0030] Figure 5 1 is a schematic diagram of the assembly process of the winding wheel in an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the installation position of the drive motor in an embodiment of the present invention;

[0032] Figure 7 is a schematic structural diagram of a drive assembly in an embodiment of the present invention;

[0033] Figure 8 Schematic diagram of the structure of the tensioning assembly in an embodiment of the present invention.

[0034] Reference numerals:

[0035] 1. Frame; 2. Winding wheel; 21. Middle ring; 22. Side ring; 221. Threading ring; 222. Through hole; 23. U-shaped wire groove; 24. Slide groove; 25. Guide ring; 26. Inner convex strip; 27. Rib; 28. Guide block; 29. ​​Through groove; 3. Mounting assembly; 31. Moving seat; 32. Rubber wheel; 33. Connecting rod; 34. Vertical rod; 35. Handwheel; 36. Slide rail; 41. Gear set; 411. Drive Moving gear; 42. Synchronizing assembly; 43. Driving motor; 44. Magnetic powder brake; 45. Transmission assembly; 451. Transmission gear 1; 452. Transmission gear 2; 453. Transmission belt; 454. One-way bearing; 46. Bearing sleeve; 47. Wheel cover; 48. Ring gear; 5. Tensioning assembly; 51. Clamp; 52. Mounting plate; 53. Spring; 6. Support wheel; 61. Annular groove; 7. Iron core; 8. Driving part. DETAILED DESCRIPTION

[0036] The following combination Figures 1 to 8 The embodiments of the present invention are described in detail, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] This embodiment discloses a coil winding device for mutual inductor production, such as Figure 1 and Figure 2 As shown, the device includes a frame 1, a winding wheel 2, a mounting assembly 3, a drive assembly and a tensioning assembly 5. The winding wheel 2 is rotatably supported on the frame 1 by a plurality of support wheels 6, and the rotation axis of the winding wheel 2 is arranged horizontally. The plurality of support wheels 6 are connected to the frame 1 on one side of the winding wheel 2 and are suspended on the other side so that the copper wire can be wound on the end of the winding wheel 2 away from the frame 1. The mounting assembly 3 is arranged in a horizontal position on the frame 1 and is used to install the iron core 7. The drive assembly is used to drive the winding wheel 2 to rotate so as to wind the copper wire on the winding wheel 2 or to wind the copper wire on the winding wheel 2 onto the iron core 7.

[0038] refer to Figure 3 and Figure 4The winding wheel 2 consists of a middle ring 21 and two side rings 22, both of which are C-shaped. The two side surfaces of the middle ring 21 are used to install the side rings 22. The outer diameter of the side rings 22 is larger than the outer diameter of the middle ring 21, so that when the two side rings 22 are respectively installed on both sides of the middle ring 21, they will exceed the outer circumference of the middle ring 21, thereby forming a U-shaped wire groove 23 on the winding wheel 2 for winding copper wire. A slide groove 24 is provided on the side wall of the side ring 22 close to the middle ring 21, and the cross section of the slide groove 24 is T-shaped. A guide ring 25 is installed in the slide groove 24. The guide ring 25 is also annular and is fixed to the side wall of the middle ring 21 by bolts. The function of the guide ring 25 is to connect the side rings 22 and the middle ring 21, ensure that the center of the side ring 22 coincides with the center of the middle ring 21, and allow relative rotation between the side ring 22 and the middle ring 21.

[0039] When the copper wire is wound onto the reel 2, the side rings 22 and the middle ring 21 rotate simultaneously, which can reduce the friction between the copper wire and the side rings 22. When the copper wire needs to be transferred from the reel 2 to the iron core 7, the middle ring 21 rotates relative to the side rings 22 to release the copper wire previously wound on the middle ring 21. In order to ensure that the copper wire can be in the middle position of the side wall of the middle ring 21 when it is wound onto the reel 2, thereby reducing the situation where the copper wire is close to the opposite side walls of the two side rings 22, inner convex strips 26 are fixedly provided on the opposite side walls of the two side rings 22. The inner convex strips 26 are arranged along the edges of the side rings 22, and their cross-section is triangular and extends to the middle of the two side rings 22. During the winding process, the copper wire will be restricted by the inner convex strips 26 and thus guided to the middle position of the middle ring 21. Ribs 27 are also provided on the annular inner wall of the middle ring 21, and the support wheel 6 supports the reel 2 through the ribs 27.

[0040] refer to Figure 5 When assembling the reel 2, the guide ring 25 is a C-shaped structure formed by splicing together multiple arc-shaped structures. The arc-shaped structures of the guide ring 25 should be fixed to the middle ring 21 one by one with bolts. After installing each arc-shaped structure, the side ring 22 should be rotated along the guide ring 25 until the guide ring 25 is installed. The length of each arc-shaped structure of the guide ring 25 is shorter than the length of the C-shaped opening of the side ring 22.

[0041] refer to Figure 3 and Figure 4A threading ring 221 is fixedly installed on the edge of the winding wheel 2. The threading ring 221 is located on the side of the winding wheel 2 away from the frame 1 and is used to pass one end of the copper wire through the threading ring 221. The threading ring 221 is made of magnetic material and can be a magnet. A through hole 222 is provided on the edge of the two side rings 22 of the winding wheel 2. The threading ring 221 is arranged at one end of the through hole 222 to block it, and the other end is a through setting. A guide block 28 is provided in the through hole 222. The guide block 28 is made of ferrous material, and the guide block 28 is arranged in a V-shaped structure near one end of the threading ring 221. When the length of the copper wire wound on the reel 2 is sufficient for winding a coil, the guide block 28 is inserted into the through hole 222, so that the V-shaped end of the guide block 28 pushes the copper wire to the threading ring 221. There is a gap at the connection between the threading ring 221 and the through hole 222, which allows the guide block 28 to enter the threading ring 221 and be retained in the through hole 222 due to magnetic attraction. In order to allow the copper wire to enter the threading ring 221 without being cut off under the push of the guide block 28, the edge of the through hole 222 is punched through to form a through groove 29 on the side ring 22 on which the threading ring 221 is installed. The copper wire can pass from the middle of the reel 2 to the side of the reel 2 at the position of the through groove 29, so that the copper wire can be wound around the iron core 7 later. When the copper wire is guided to the threading ring 221, the copper wire is cut so that the free end of the copper wire can be wound around the iron core 7. Then the winding wheel 2 is rotated, and the threading ring 221 rotates with the winding wheel 2 at the same time, so that the copper wire can be continuously wound around the iron core 7 to form a coil.

[0042] A drive member 8 for removing the guide block 28 is fixedly provided on the frame 1. The drive member 8 can be used in conjunction with an electromagnet and an electric cylinder. When the electromagnet is energized, the suction force generated is greater than the magnetic force of the threading ring 221 on the guide block 28. The electric cylinder moves the electromagnet closer to or away from the guide block 28 so that the suction force generated by the electromagnet after energization can draw the guide block 28, allowing the guide block 28 to be removed from the through hole 222. In this way, the copper wire can be wound onto the reel 2 again, making it convenient to wind the next coil. In order to facilitate the electromagnet's attraction to the guide block 28, a sensor for detecting the position of the reel 2 is fixedly provided on the frame 1 so that when the reel 2 stops rotating, the position of the drive member 8 corresponds to the guide block 28.

[0043] refer to Figure 6 and Figure 7The driving assembly includes two gear sets 41 for driving the side ring 22 to rotate, and a synchronization assembly 42 is provided between the two gear sets 41. The synchronization assembly 42 is used to make the two gear sets 41 rotate synchronously. The two gear sets 41 are respectively connected to two different parts of the winding wheel 2, and the distance between the two gear sets 41 is greater than the width of the C-shaped opening of the winding wheel 2. In this way, when the winding wheel 2 rotates, at least one gear set 41 can drive the side ring 22. When the two gear sets 41 drive the side ring 22 at the same time, the normal rotation of the side ring 22 can be guaranteed due to the synchronization effect of the synchronization assembly 42. A drive motor 43 is connected to one of the gear sets 41. The drive motor 43 can be a servo motor. The drive motor 43 can drive the winding wheel 2 to rotate in a forward or reverse manner so as to wind the copper wire on the winding wheel 2 or transfer the copper wire to the iron core 7.

[0044] Another synchronization assembly 42 is positioned between at least two support wheels 6. This synchronization assembly 42 utilizes a synchronous gear and belt structure. The support wheel 6 connected to the synchronization assembly 42 drives the middle ring 21, while the gear set 41 drives the side rings 22. When simultaneous rotation of the middle ring 21 and the side rings 22 is required, the drive assembly simultaneously drives the two support wheels 6 connected to the synchronization assembly 42 and the two gear sets 41. A magnetic powder brake 44 is mounted on one of the support wheels 6 connected to the synchronization assembly 42. This provides resistance to the rotation of the middle ring 21 as the copper wire transfers to the iron core 7, maintaining tension in the copper wire. When de-energized, the magnetic powder brake 44 does not resist the operation of the middle ring 21.

[0045] A transmission assembly 45 is provided between a gear assembly 41 and a support wheel 6 connected to a synchronization assembly 42. The transmission assembly 45 comprises a transmission gear 1 451, a transmission gear 2 452, a transmission belt 453, and a one-way bearing 454. Transmission gear 1 451 is coaxially fixed to the gear assembly 41, while transmission gear 2 452 is coaxially mounted on the support wheel 6 via a one-way bearing 454. The transmission belt 453 is connected between transmission gear 1 451 and transmission gear 2 452. When the middle ring 21 and the side ring 22 need to rotate simultaneously, transmission gear 2 452 drives the support wheel 6 via the one-way bearing 454, and the copper wire begins to wind around the winding reel 2. However, when the copper wire needs to be transferred to the iron core 7, the drive motor 43 rotates in the opposite direction. At this time, transmission gear 2 452 cannot drive the support wheel 6 due to the one-way bearing 454. As the copper wire is transferred, it drives the middle ring 21 to rotate. Simultaneously, the middle ring 21 is subjected to resistance provided by the magnetic powder brake 44, thereby keeping the copper wire taut.

[0046] Continue to refer Figure 6 and Figure 7The gear set 41 and the support wheel 6 are both mounted on the frame 1 through the bearing sleeve 46. A wheel cover 47 is also fixed on the frame 1. The wheel cover 47 is used to cover the transmission component 45 and the synchronization component 42 to play a protective role, and the drive motor 43 and the magnetic powder brake 44 can be fixed on the wheel cover 47. The gear set 41 includes two coaxially fixed drive gears 411. Figure 5 A C-shaped ring gear 48 is coaxially fixed to the side ring 22. The ring gears 48 on the two side rings 22 mesh with the two drive gears 411, respectively, allowing the gear set 41 to simultaneously drive the two side rings 22 to rotate. An annular groove 61 is defined on the sidewall of the support wheel 6, and the ribs 27 are supported within the annular groove 61. The support wheel 6 is made of rubber, which provides greater friction against the ribs 27, thereby ensuring that the support wheel 6 drives the center ring 21.

[0047] refer to Figure 8 The tensioning assembly 5 includes two opposing clamps 51. The sides of the clamps 51 that are close to each other are curved and fixedly covered with cloth. The cloth can be made of flexible cotton cloth to reduce damage to the copper wire and provide friction for the copper wire. The relative positions of the two clamps 51 are aligned with the side of the winding wheel 2 away from the frame 1. When the copper wire is transferred to the iron core 7, the copper wire will pass between the two clamps 51, and the tension is maintained by the friction force of the clamps 51 on the copper wire. When in use, the copper wire is wound around the iron core 7 once, and the copper wire is tensioned at least once by the magnetic powder brake 44 to keep the copper wire in a tensioned state. In this embodiment, the position where the copper wire is tensioned each time can be on the side of the winding wheel 2 away from the installation position of the iron core 7. A mounting plate 52 is fixedly provided on the frame 1. The mounting plate 52 is provided parallel to the clamping plate 51 away from the frame 1, and a plurality of springs 53 are provided between the mounting plate 52 and the clamping plate 51 away from the frame 1. The plurality of springs 53 are arranged at intervals. A stud is passed through the interior of each spring 53. One end of the stud is fixed to the clamping plate 51, and the other end passes through the mounting plate 52 and is threadedly connected to a nut. The elastic force of the spring 53 on the clamping plate 51 can be adjusted by the nut.

[0048] refer to Figure 1The mounting assembly 3 includes a movable seat 31 and three rubber wheels 32. The axes of the three rubber wheels 32 are arranged vertically, and one of the rubber wheels 32 is connected to a power source for driving its rotation. The power source can be a servo motor, which is installed inside the movable seat 31 and fixedly connected to the movable seat 31. The other two rubber wheels 32 are connected by a connecting rod 33, one end of the connecting rod 33 is used to rotate the rubber wheel 32, and the other end is fixedly provided with a vertical rod 34. The vertical rod 34 is rotatably set on the movable seat 31, and a worm gear structure is used to drive it inside the movable seat 31, so that the distance between the two rubber wheels 32 can be adjusted to accommodate iron cores 7 of different sizes. When the iron core 7 is placed between the three rubber wheels 32, the rubber wheels 32 can be driven by the power source to drive the iron core 7 to rotate so that the copper wire is evenly wound around the iron core 7. A horizontal slide rail 36 is fixedly provided on the frame 1, and the movable seat 31 is slidably connected to the slide rail 36. In addition, a hand wheel 35 is rotatably provided on the movable base 31. By rotating the hand wheel 35, a screw installed inside the movable base 31 can be rotated. The screw is connected to the frame 1, so that the rotation of the screw can drive the movable base 31 to move along the slide rail 36, thereby adjusting the center position of the iron core 7 to ensure that the position of the iron core 7 is convenient for the passage of the winding reel 2.

[0049] The working process of this embodiment is as follows:

[0050] The process of winding the copper wire on the winding wheel 2: first place the iron core 7 on the mounting assembly 3, and adjust the position of the three rubber wheels 32 to ensure that the center of the iron core 7 is facing the winding wheel 2. The iron core 7 can be placed directly on the C-shaped notch of the winding wheel 2. Then, fix one end of the copper wire on the outer wall of the middle ring 21. The fixing method can be to stick it with tape or to fix it with a hook. After starting the drive motor 43, the drive motor 43 drives the two support wheels 6 to rotate through the transmission assembly 45. The transmission ratio design of the transmission assembly 45 makes the rotation speed of the middle ring 21 consistent with that of the side ring 22. At the same time, the two gear sets 41 also rotate under the action of the drive motor 43 to drive the side ring 22 to rotate. In this way, the copper wire will be wound along the outer wall of the middle ring 21 until it reaches the required length of one coil and stops. At this time, manually insert the guide block 28 into the through hole 222. Under the action of the guide block 28, the end of the copper wire is guided into the threading ring 221. The end of the copper wire can be cut at the threading ring 221 to facilitate subsequent winding onto the iron core 7.

[0051] The process of transferring the copper wire from the winding wheel 2 to the iron core 7: The copper wire is wound on the iron core 7 from the end that passes through the threading ring 221. At this time, the drive motor 43 rotates in the opposite direction. Since a one-way bearing 454 is provided in the transmission assembly 45, the drive motor 43 only drives the side ring 22 to rotate. When the side ring 22 rotates, the end of the copper wire moves with the rotation of the threading ring 221, and then the copper wire pulls the middle ring 21 to rotate. The magnetic powder brake 44 provides the necessary tension for the copper wire. When the copper wire passes between the two clamps 51, it will be clamped by the clamps 51 and the clamps 51 provide tension. After the copper wire is wrapped around the iron core 7, the magnetic powder brake 44 provides resistance to ensure the tension of the copper wire, so that it can be tightly and evenly wound on the iron core 7.

[0052] In other implementations, the mounting assembly 3 may not be provided, and the core may be wound by hand. In other embodiments, each of the two clamping plates 51 in the tensioning assembly 5 is provided with a corresponding mounting plate 52. The two clamping plates 51 are connected to the corresponding mounting plates 52 using springs 53, enabling both clamping plates 51 to provide clamping force. In other embodiments, the driving member 8 may also utilize a robotic arm to clamp the guide block 28, allowing the guide block 28 to enter or be removed from the through-hole 222.

[0053] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A coil winding device for transformer production, comprising a frame, characterized in that: Also includes: The winding wheel is rotatably supported on the frame by multiple support wheels, and the winding wheel has a C-shaped notch for accommodating the iron core. The winding wheel includes a middle ring and side rings located on both sides of the middle ring. The side rings are coaxial with the middle ring and are rotatable relative to each other. The peripheral wall of the middle ring is used for winding copper wire, and one of the side rings is provided with a threading ring for threading the end of the copper wire; A through hole is opened at the edge of the winding wheel corresponding to the position of the threading ring. A detachable guide block is set in the through hole. The guide block is set in a V shape at one end close to the threading ring. The guide block is inserted into the through hole and pushes the copper wire into the threading ring. Tensioning assembly, which is used to clamp the copper wire between the iron core and the threading ring; Magnetic powder brake, which is connected to the support wheel and provides resistance to the middle ring through the support wheel to tension the copper wire; A drive assembly is used to drive the side ring to rotate and wind the copper wire onto the iron core. The drive assembly includes two gear sets for driving the side ring to rotate. A synchronization assembly is provided between the two gear sets. The synchronization assembly is used to synchronize the rotation of the two gear sets. The distance between the two gear sets is greater than the width of the C-shaped opening of the winding wheel. Another synchronization component is arranged between at least two support wheels, and a transmission component is arranged between a support wheel connected to the synchronization component and the gear set; when the copper wire is wound on the winding wheel, the drive component drives the middle ring and the side ring to rotate simultaneously through the transmission component.

2. A coil winding device for mutual inductor production according to claim 1, characterized in that: A slide groove is provided on the side of the side ring close to the middle ring. The cross-section of the slide groove is T-shaped and the slide groove is arranged along the arc direction of the side ring. A guide ring is provided in the slide groove. The guide ring is fixed to the middle ring by bolts. The guide ring is arranged to be composed of multiple arc structures, and the length of each arc structure is less than the length of the C-shaped opening of the side ring.

3. A coil winding device for mutual inductor production according to claim 1, characterized in that: The inner peripheral wall of the middle ring is provided with ribs, and the peripheral wall of the supporting wheel is provided with an annular groove, in which the ribs are supported.

4. A coil winding device for mutual inductor production according to claim 1, characterized in that: The transmission assembly includes a transmission gear 1, a transmission gear 2, a transmission belt and a one-way bearing. The transmission gears are coaxially fixed on the gear set, and the transmission gear 2 is coaxially arranged on the support wheel through the one-way bearing. The transmission belt is connected between the transmission gear 1 and the transmission gear 2, and the transmission ratio of the transmission gear 1 and the transmission gear 2 is used to make the middle ring and the side ring rotate at the same speed when winding the copper wire.

5. A coil winding device for mutual inductor production according to any one of claims 1 or 4, characterized in that: The gear set includes two coaxially fixed driving gears, a side ring is coaxially fixed with a gear ring, and the gear rings on the two side rings are respectively meshed with the two driving gears in a one-to-one correspondence.

6. A coil winding device for mutual inductor production according to claim 1, characterized in that: The tensioning assembly includes two opposing clamps, the sides of the clamps that are close to each other are arc-shaped surfaces, the plane between the two clamps is aligned with the side of the winding wheel where the threading ring is set, and a mounting plate is set at the position corresponding to one of the clamps, and multiple springs are set between the mounting plate and the clamps.

7. A coil winding device for mutual inductor production according to claim 1, characterized in that: The frame is provided with an installation assembly, which includes a movable seat and three rubber wheels installed on the movable seat. The distance between the three rubber wheels is adjusted to place iron cores of different sizes. The movable seat is slidably connected to the frame, and the position of the movable seat is adjusted to allow the winding wheel to pass through the middle of the iron core.

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