A winding device for a transformer

Abstract

The application relates to the technical field of transformer winding equipment, and particularly provides a winding equipment for a transformer, which comprises a rack, an extrusion roller, a winding roller and a winding iron core arranged on the rack in sequence from top to bottom, the enameled wire is clamped between the extrusion roller and the winding roller, the extrusion roller is arranged in a rectangular shape same as the cross section of the winding iron core, an arc-shaped groove matched with the arc edges of the two is formed on the outer periphery of the winding roller, the enameled wire is extruded into the arc-shaped groove through the arc edge of the outer periphery of the extrusion roller to be pre-bent, the bent shape of the enameled wire is consistent with the arc edge of the outer periphery of the winding iron core, the circumference of the winding roller is equal to the circumference of the winding iron core, and the enameled wire can be tightly attached to the outer periphery of the winding iron core in cooperation with the different bending directions of the enameled wire on the winding roller, the gap between the windings can be effectively eliminated, and the attachment between the windings of each layer can be improved.

Description

A transformer winding device Technical Field

[0001] This invention relates to the field of transformer winding equipment technology, and in particular to a transformer winding device. Background Technology

[0002] Transformer winding equipment is a specialized device used to produce transformer coils. Its main function is to wind conductors (such as enameled wire or paper-insulated wire) evenly and neatly onto a frame or iron core in a set manner to form the primary and secondary coils of the transformer.

[0003] For example, Chinese patent CN118507248B discloses an automatic production line for transformer coil winding. This solution includes a base and several wire conveying assemblies. A vertical plate is fixed between the base and the wire conveying assemblies. Symmetrically distributed driven assemblies are rotatably mounted on the base. A straight rod is fixed between two driven assemblies. A wire assembly is fixed on one side of the base. A wire guide groove is provided on the vertical plate. A sliding rod and a rotating rod are rotatably mounted in the wire guide groove. A guide hole that cooperates with the sliding rod is provided on one side of the wire guide groove. An arc-shaped plate is fixed to the end of the sliding rod. A protrusion is fixed to one end of the rotating rod, and an arc-shaped plate is fixed to the other end. Through grooves are provided at both ends of the arc-shaped plate. This solution uses a wire conveying assembly to move the wire, meeting the winding needs of multiple stations. Workers at multiple stations wind wires separately and simultaneously. By guiding wires of different diameters, positioning and assisting winding are achieved, and the winding is coordinated with the rotation of the winding frame.

[0004] However, the above-mentioned method of manually winding the coil requires a lot of effort and time from the workers, which increases the labor intensity and labor costs. In addition, gaps often appear between the windings during the winding process, and the fit between each layer of winding is not good enough, which greatly reduces the winding quality. Summary of the Invention

[0005] Therefore, it is necessary to provide a transformer winding device to address the problems of high labor costs and low winding quality of current winding equipment.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A transformer winding device, comprising:

[0008] A frame, on which extrusion rollers, winding rollers and winding cores are arranged sequentially from top to bottom, with enameled wire sandwiched between the extrusion rollers and the winding rollers, and the enameled wire being wound around the winding core by the winding rollers;

[0009] A wire feeding assembly capable of feeding enameled wire between the extrusion roller and the winding roller;

[0010] The extrusion roller and the winding core have the same cross-section and are both rectangular. The perimeter of the cross-section of the winding roller is equal to the perimeter of the cross-section of the winding core. The outer perimeter of the winding roller has four inwardly recessed arc-shaped grooves, the shape of which matches the arc edge shape of the outer perimeter of the winding core and the outer perimeter of the extrusion roller.

[0011] Furthermore, the axes of the extrusion roller, the winding roller, and the winding core are all on the same vertical plane. The winding roller is rotatably mounted on the frame, and the extrusion roller and the winding core can move vertically and rotate around their own axes.

[0012] Furthermore, the frame is provided with a first vertical groove and a second vertical groove, the first vertical groove and the second vertical groove are located on the same vertical plane, the first vertical groove is located above the second vertical groove, the shaft of the extrusion roller is slidably disposed in the first vertical groove, and the shaft of the winding core is slidably disposed in the second vertical groove.

[0013] Furthermore, the frame is provided with a stabilizing component, which is capable of keeping the extrusion roller and the winding roller clamping the enameled wire and keeping the enameled wire on the outer periphery of the winding roller in contact with the outer periphery of the winding core.

[0014] Furthermore, the stabilizing component includes a transmission rod, a first clamping ring sleeve, and a second clamping ring sleeve. The first clamping ring sleeve is rotatably sleeved on the outer circumference of the shaft of the extrusion roller, and the second clamping ring sleeve is rotatably sleeved on the outer circumference of the shaft of the winding core. The transmission rod is vertically mounted on the frame, and the other end of the transmission rod is helically connected to the other end of the first and second clamping ring sleeves. The transmission rod has two helical grooves, which are symmetrically arranged about the midpoint of the transmission rod and have opposite directions of rotation.

[0015] Furthermore, an electric motor is installed on the frame, and the motor shaft is coaxial with and fixedly connected to the transmission rod.

[0016] Furthermore, the wire feeding assembly includes a sliding block, a lead screw, and a guide rod. The lead screw is rotatably mounted on the frame, and its axis is parallel to the axis of the winding roller. The guide rod is fixedly mounted on the frame, and its axis is parallel to the axis of the lead screw. The sliding block is axially slidably connected to the outer periphery of the guide rod and is helically connected to the lead screw. Multiple conveying wheels are rotatably mounted on the sliding block, and the enameled wire is clamped between the multiple conveying wheels.

[0017] Furthermore, the frame is provided with a drive mechanism, which can drive the lead screw to rotate around its own axis and drive the winding roller to rotate around its own axis.

[0018] Furthermore, the driving mechanism includes a first driving motor and a second driving motor. The shaft of the first driving motor is coaxial with and fixedly connected to the lead screw, and the shaft of the second driving motor is coaxial with and fixedly connected to the shaft of the winding roller.

[0019] Furthermore, the depth of the arc-shaped groove is adapted to the arc edge of the outer periphery of the wound iron core.

[0020] The beneficial effects of this invention are:

[0021] This invention sets the extrusion roller as a rectangle with the same cross-section as the winding core, and opens an arc-shaped groove on the outer circumference of the winding roller that matches the arc edge of both. The enameled wire is squeezed into the arc-shaped groove by the arc edge of the outer circumference of the extrusion roller for pre-bending, so that the bending shape of the enameled wire is consistent with the arc edge of the outer circumference of the winding core, and the circumference of the winding roller is equal to the circumference of the winding core. With different bending directions of the enameled wire on the winding roller, the enameled wire can be tightly attached to the outer circumference of the winding core, effectively eliminating gaps between windings and improving the adhesion between each layer of winding.

[0022] This invention, by arranging a pressing roller, a winding roller, and a winding core in the same vertical plane, and by allowing the pressing roller and the winding core to move vertically and rotate around their own axes, ensures that they are always in contact with the outer periphery of the winding roller, preventing the enameled wire from detaching. At the same time, the stabilizing components on the frame, whether through the cooperation of a transmission rod, a first clamping ring, and a second clamping ring, or by using other structures such as a slide rod or an elastic element, can maintain the clamping of the enameled wire by the pressing roller and the winding roller, and ensure that the enameled wire on the outer periphery of the winding roller is in contact with the outer periphery of the winding core, thus ensuring the stable progress of the winding process.

[0023] This invention, through the lead screw, guide rod and sliding block of the wire feeding assembly, in conjunction with the first drive motor and the second drive motor in the drive mechanism, can realize the automated winding operation of enameled wire from one end of the winding core to the other, avoiding manual winding and reducing the labor intensity and labor cost of workers. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the structure of a transformer winding device provided in an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the winding device of a transformer provided in an embodiment of the present invention from another angle;

[0026] Figure 3 is a left view of the winding device of a transformer provided in one embodiment of Figure 1;

[0027] Figure 4 is a front view of the winding device of a transformer provided in one embodiment of Figure 1;

[0028] Figure 5 is a top view of the winding device of a transformer provided in one embodiment of Figure 1;

[0029] Figure 6 is a first state view of the winding device of the transformer provided in one embodiment of Figure 5, cut along AA;

[0030] Figure 7 is a second state view of the winding device of the transformer provided in one embodiment of Figure 5, cut along AA;

[0031] Figure 8 is a third state diagram of the winding device of the transformer provided in one embodiment of Figure 5, cut along AA.

[0032] in:

[0033] 100. Frame; 110. First vertical groove; 120. Second vertical groove; 130. First guide rail; 140. Second guide rail; 150. First clamping ring sleeve; 160. Second clamping ring sleeve; 170. Transmission rod; 180. Spiral groove; 190. Electric motor;

[0034] 200. Extrusion roller; 210. Winding roller; 220. Arc groove; 230. Winding core;

[0035] 300. Lead screw; 310. Guide rod; 320. Sliding block; 330. Conveyor wheel;

[0036] 400. Enamelled wire. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0038] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] The following description of a transformer winding device provided by the present invention refers to Figures 1-8.

[0041] A transformer winding device includes a frame 100, on which, from top to bottom, are arranged a pressing roller 200, a winding roller 210, and a winding core 230. Enamelled wire 400 is held between the pressing roller 200 and the winding roller 210. The enamelled wire 400 is wound around the outer periphery of the winding core 230 by the winding roller 210. A wire feeding assembly is provided on the frame 100, which can input the enamelled wire 400 between the pressing roller 200 and the winding roller 210 to ensure that the enamelled wire 400 can continuously wrap around the outer periphery of the winding core 230. The wire feeding assembly winds the enamelled wire 400 from one end of the winding core 230 to the other end of the winding core 230. In the prior art, during the process of winding the enamelled wire 400 into the rectangular winding core 230, gaps often appear between the windings, and the fit between each layer of winding is insufficient, which greatly reduces the winding quality.

[0042] To solve the above problems, the extrusion roller 200 of the present invention is rectangular. The cross-section of the extrusion roller 200 and the cross-section of the winding core 230 are the same and both are rectangular. The perimeter of the cross-section of the winding roller 210 is equal to the perimeter of the cross-section of the winding core 230. Four inwardly recessed arc-shaped grooves 220 are provided on the outer periphery of the winding roller 210. The shape of the arc-shaped grooves 220 is adapted to the arc-shaped edge shape of the outer periphery of the extrusion roller 200 and the winding core 230.

[0043] It should be noted that the extrusion roller 200 and the winding core 230 are located above and below the winding roller 210, respectively. The enameled wire 400 held between the extrusion roller 200 and the winding roller 210 is squeezed into the arc-shaped groove 220 on the outer periphery of the winding roller 210 by the arc edge of the outer periphery of the extrusion roller 200, thereby pre-bending the enameled wire 400. The bending shape is the same as the arc edge shape on the outer periphery of the winding core 230. The enameled wire 400 is squeezed by the extrusion roller 200 onto the outer periphery of the winding roller 210, as shown in Figures 6, 7, and 8. As the winding roller 210 rotates, the upper enameled wire 400 on the outer periphery of the winding roller 210 gradually adheres to the outer periphery of the winding core 230. When the outer periphery of the winding core 230... When the arc edge of the winding roller 210 contacts the arc groove 220 on the outer periphery of the winding roller 210, the pre-bent enameled wire 400 inside the arc groove 220 of the winding roller 210 adheres to the arc edge on the outer periphery of the winding core 230, thereby allowing the enameled wire 400 to adhere more tightly to the outer periphery of the winding core 230. Furthermore, the perimeter of the cross-section of the winding roller 210 is equal to the perimeter of the cross-section of the winding core 230. When the winding roller 210 rotates one revolution, it can drive the winding core 230 to rotate one revolution. The four arc grooves 220 on the outer periphery of the winding roller 210 correspond to the four arc edges on the outer periphery of the winding core 230, thereby allowing the enameled wire 400 to adhere smoothly to the four arc edges on the outer periphery of the winding roller 210, preventing gaps from forming.

[0044] It is understandable that, since the extrusion roller 200 and the winding core 230 are located on the upper and lower sides of the winding roller 210, the bending direction of the enameled wire 400 clamped on the winding roller 210 is opposite to the bending direction of the wire wound around the outer circumference of the winding roller 210. This allows the enameled wire 400 to adhere tightly to the outer circumference of the winding core 230 during its winding process, ensuring that the pre-bending position of the enameled wire 400 corresponds to the arc edge of the outer circumference of the winding core 230. At the same time, the opposite bending direction of the enameled wire 400 allows it to apply a certain force during its winding process around the outer circumference of the winding core 230, thereby giving the enameled wire 400 a certain adhesion force to the winding core 230, which can prevent gaps and improve the adhesion between each layer of winding.

[0045] By adopting the above-mentioned structural design, the problem of enameled wire 400 being difficult to tightly fit at the corners when processing rectangular winding core 230 by traditional winding equipment is overcome, resulting in obvious gaps between the windings. However, this invention achieves pre-bending and precise fitting of enameled wire 400 by using the rectangular shape of the extrusion roller 200 and the arc groove 220 on the outer periphery of the winding roller 210. This allows the enameled wire 400 to tightly wrap around the outer periphery of the winding core 230, effectively eliminating gaps between the windings. This not only improves the space utilization of the winding core 230 but also enhances the electromagnetic performance of the transformer and reduces energy loss.

[0046] Specifically, to accommodate the rotation of the rectangular extrusion roller 200 and the winding core 230, the axes of the extrusion roller 200, the winding roller 210, and the winding core 230 are set on the same vertical plane. The winding roller 210 can be driven to rotate around its own axis by other power sources. The extrusion roller 200 and the winding core 230 can not only rotate around their own axes, but also move in the vertical direction, thereby ensuring that the outer periphery of the extrusion roller 200 and the outer periphery of the winding core 230 can always be in contact with the outer periphery of the winding roller 210, preventing the enameled wire 400 from being squeezed by the extrusion roller 200, and at the same time preventing the enameled wire 400 from being detached from the winding core 230.

[0047] More specifically, as shown in Figures 1 and 4, the frame 100 has a first vertical groove 110 and a second vertical groove 120. The first vertical groove 110 and the second vertical groove 120 are located on the same vertical plane. The first vertical groove 110 is located above the second vertical groove 120. The rotating shaft of the extrusion roller 200 is located in the first vertical groove 110. The extrusion roller 200 can move up and down along the first vertical groove 110. The extrusion roller 200 rotates around its own axis while moving up and down along the first vertical groove 110. The rotating shaft of the winding core 230 is located in the second vertical groove 120. The winding core 230 can move up and down along the second vertical groove 120. The winding core 230 rotates around its own axis while moving up and down along the second vertical groove 120.

[0048] In a further embodiment, a stabilizing component is provided on the frame 100. This stabilizing component is used to maintain the extrusion roller 200 clamping the enameled wire 400. The stabilizing component also maintains the enameled wire 400 on the outer periphery of the winding roller 210 in contact with the outer periphery of the winding core 230. The stabilizing component in this invention includes a transmission rod 170, a first clamping ring 150, and a second clamping ring 160, as shown in Figures 1 and 4. The first clamping ring 150 is rotatably sleeved on the rotating shaft of the extrusion roller 200, and the rotating shaft of the extrusion roller 200 can rotate relative to the first clamping ring 150. The second clamping ring 160 is rotatably sleeved on the rotating shaft of the winding core 230. The shaft of the iron core 230 can rotate relative to the second clamping ring 160. The transmission rod 170 is vertically mounted on the frame 100, and the axis of the transmission rod 170 is perpendicular to the axis of the winding roller 210. The other ends of the first clamping ring 150 and the second clamping ring 160 are spirally connected to the outer circumference of the transmission rod 170. The outer circumference of the transmission rod 170 is provided with two spiral grooves 180. The two spiral grooves 180 are symmetrically arranged about the midpoint of the transmission rod 170, and the spiral directions of the two spiral grooves 180 are opposite. When the transmission rod 170 rotates around its own axis, it can drive the first clamping ring 150 and the second clamping ring 160 to move synchronously but in opposite directions.

[0049] It is understandable that, since both the extrusion roller 200 and the winding core 230 are rectangular, when the winding roller 210 rotates around its own axis, causing the extrusion roller 200 and the winding core 230 to rotate, the transmission rod 170 simultaneously rotates around its own axis, thereby driving the first clamping ring 150 and the second clamping ring 160 to move up and down within the first vertical groove 110 and the second vertical groove 120, thereby driving the extrusion roller 200 and the winding core 230 to move in the vertical direction. This allows the outer periphery of the extrusion roller 200 and the winding roller 210 to clamp the enameled wire 400, and the enameled wire 400 wound around the outer periphery of the winding roller 210 to adhere to the outer periphery of the winding core 230.

[0050] In order to make the transmission rod 170 rotate around its own axis, a motor 190 is installed on the frame 100. The rotating shaft of the motor 190 is coaxial with and fixedly connected to the transmission rod 170. When the motor 190 rotates, it drives the transmission rod 170 to rotate.

[0051] To ensure that the first clamping ring 150 and the second clamping ring 160 move smoothly in the vertical direction of the frame 100, as shown in Figures 1 and 4, a first guide rail 130 and a second guide rail 140 extending vertically are provided on the frame 100. The first clamping ring 150 and the second clamping ring 160 slide through the first guide rail 130 and the second guide rail 140 respectively, and move smoothly under the guidance of the first guide rail 130 and the second guide rail 140.

[0052] It should be noted that the stabilizing component in this invention is not limited to the structure described above. The transmission rod 170 can also be replaced with a sliding rod. A first elastic element and a second elastic element are sleeved around the outer periphery of the sliding rod. One end of the first elastic element is fixedly connected to the first clamping ring 150, and the other end is fixedly connected to the sliding rod. The first elastic element is a tension spring. The first elastic element pulls the first clamping ring 150 downwards, causing the first clamping ring 150 to move the extrusion roller 200 downwards or giving the extrusion roller 200 a downward tendency. This allows the extrusion roller 200 to consistently clamp the enameled wire 400. Similarly, one end of the second elastic element is fixedly connected to the second clamping ring 160, and the other end is fixedly connected to the slide rod. The second elastic element is also a tension spring. The second elastic element pulls the second clamping ring 160 upward, which in turn causes the winding core 230 to move upward or gives the winding core 230 a tendency to move upward, thus allowing the enameled wire 400 on the winding roller 210 to adhere to the outer periphery of the winding core 230. Of course, other structures are also possible, and no specific limitations are made here.

[0053] Specifically, as shown in Figures 2 and 5, the wire feeding assembly in this embodiment includes a sliding block 320, a lead screw 300, and a guide rod 310. The lead screw 300 is rotatably mounted on the frame 100, and its axis is parallel to the axis of the winding roller 210. The guide rod 310 is fixedly mounted on the frame 100. In this embodiment, there are two guide rods 310, located on both sides of the lead screw 300, with their axes parallel to the axis of the lead screw 300. The sliding block 320 is slidably mounted on the guide rod 310 and is helically connected to the lead screw 300. When the lead screw 300 rotates around its own axis, it can drive the sliding block 320 along the guide rod. The axial movement of the rod 310 is facilitated by the sliding block 320, which is equipped with multiple conveying wheels 330. The enameled wire 400 is held between the multiple conveying wheels 330. When the winding roller 210 rotates around its own axis, it pulls the enameled wire 400. The enameled wire 400 moves between the multiple conveying wheels 330, which act as guides. While the enameled wire 400 is pulled by the winding roller 210, the lead screw 300 rotates, causing the sliding block 320 to move along the axial direction of the lead screw 300. The movement of the sliding block 320 along the axial direction of the lead screw 300 allows the enameled wire 400 to tilt slightly, thus enabling the enameled wire 400 to be wound from one end of the winding core 230 to the other end of the winding core 230.

[0054] In a further embodiment, a drive mechanism is provided on the frame 100. The drive mechanism is used to drive the lead screw 300 to rotate around its own axis. The drive mechanism can also drive the winding roller 210 to rotate around its own axis.

[0055] Specifically, as shown in Figures 1 and 2, the drive mechanism includes a first drive motor and a second drive motor (not shown in the figures). The first drive motor is fixedly mounted on the frame 100. The shaft of the first drive motor is coaxial with and fixedly connected to the lead screw 300. When the first drive motor rotates, it can drive the lead screw 300 to rotate. When the lead screw 300 rotates, it drives the sliding block 320 to move along the axial direction of the lead screw 300. The second drive motor is also fixedly mounted on the frame 100. The shaft of the second drive motor is coaxial with and fixedly connected to the shaft of the winding roller 210. When the second drive motor rotates, it drives the winding roller 210 to rotate around its own axis.

[0056] In a further embodiment, the depth of the inwardly recessed arc groove 220 on the outer periphery of the winding roller 210 in this invention is relatively shallow. The depth of the arc groove 220 is adapted to the arc edge of the outer periphery of the winding core 230, so that the pre-bent enameled wire 400 in the arc groove 220 can be adapted to the arc edge of the outer periphery of the winding core 230. It is not necessary for the arc groove 220 to be deep. If the arc groove 220 is deep, the length of the enameled wire 400 pressed into the arc groove 220 by the pressing roller 200 will increase, which will result in a larger pre-bent area of ​​the enameled wire 400, thereby affecting the quality of the enameled wire 400 adhering to the winding core 230. Therefore, the depth of the arc groove 220 in this invention is relatively shallow, as long as it can pre-bend the enameled wire 400.

[0057] The specific working process of a transformer winding device provided by the present invention will be described in conjunction with the above embodiments:

[0058] Install:

[0059] The winding core 230 to be wound is installed on the frame 100. The shaft of the winding core 230 is located in the second vertical groove 120. The sliding block 320 on the lead screw 300 is located at the end of the lead screw 300 and is close to the end of the winding core 230 where the winding begins. The enameled wire 400 is passed through the multiple conveying rollers 330 on the sliding block 320 and then through the gap between the extrusion roller 200 and the winding roller 210, so that the extrusion roller 200 and the winding roller 210 can clamp the enameled wire 400. Finally, one end of the enameled wire 400 is fixed to the starting end of the winding core 230 where the winding begins.

[0060] Start winding:

[0061] The first drive motor, the second drive motor (not shown in the figure), and the motor 190 are started. The first drive motor drives the lead screw 300 to rotate around its own axis. The lead screw 300 drives the sliding block 320 to gradually move from one end of the lead screw 300 to the other end. The sliding block 320 causes the enameled wire 400 to tilt, so that the enameled wire 400 can wrap around the outer periphery of the winding core 230. The second drive motor drives the winding roller 210 to rotate. The winding roller 210 clamps the enameled wire 400 through the extrusion roller 200. When the winding roller 210 rotates, it pulls the enameled wire 400. The specific process is shown in the state changes in Figures 6 to 8. When the arc edge of the outer periphery of the extrusion roller 200 cooperates with the arc groove 220 of the outer periphery of the winding roller 210, it can press the enameled wire 400 into the arc groove 220, so that the enameled wire 400 can wrap around the outer periphery of the winding core 230. The wire 400 is pre-bent, and the shape of the pre-bent enameled wire 400 is the same as the shape of the arc edge of the outer periphery of the winding core 230. As the winding roller 210 rotates, the enameled wire 400 wrapped around the winding roller 210 can gradually wind onto the winding core 230. The pre-bent enameled wire 400 in the arc groove 220 of the winding roller 210 can fit into the arc edge of the outer periphery of the winding core 230. The bending direction of the enameled wire 400 wrapped around the winding roller 210 is different from the bending direction required for the outer periphery of the winding core 230. This makes the reverse bending of the enameled wire 400 when the winding roller 210 winds the enameled wire 400 onto the winding core 230 able to tightly fit the enameled wire 400 into the outer periphery of the winding core 230, preventing gaps from forming on the winding core 230.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A winding device for a transformer, characterized in that, include: The frame includes, from top to bottom, a pressing roller, a winding roller, and a winding core. Enamelled wire is held between the pressing roller and the winding roller, and the wire is wound around the winding core via the winding roller. A wire feeding assembly is provided to feed the enamelled wire between the pressing roller and the winding roller. The pressing roller and the winding core have the same rectangular cross-section, and the perimeter of the winding roller's cross-section is equal to the perimeter of the winding core's cross-section. The outer periphery of the winding roller has four inwardly recessed arc-shaped grooves, the shape of which matches the arc-shaped edges of the outer periphery of the winding core and the pressing roller.

2. The winding device for a transformer according to claim 1, characterized in that, The axes of the extrusion roller, the winding roller, and the winding core are all on the same vertical plane. The winding roller is rotatably mounted on the frame. The extrusion roller and the winding core can move vertically and rotate around their own axes.

3. The winding device for a transformer according to claim 2, characterized in that, The frame is provided with a first vertical groove and a second vertical groove, which are located on the same vertical plane. The first vertical groove is located above the second vertical groove. The shaft of the extrusion roller is slidably disposed in the first vertical groove, and the shaft of the winding core is slidably disposed in the second vertical groove.

4. The winding device for a transformer according to claim 3, characterized in that, The frame is equipped with a stabilizing component, which can keep the extrusion roller and the winding roller clamping the enameled wire and keep the enameled wire on the outer periphery of the winding roller in contact with the outer periphery of the winding core.

5. The winding device for a transformer according to claim 4, characterized in that, The stabilizing component includes a transmission rod, a first clamping ring sleeve, and a second clamping ring sleeve. The first clamping ring sleeve is rotatably sleeved on the outer circumference of the shaft of the extrusion roller, and the second clamping ring sleeve is rotatably sleeved on the outer circumference of the shaft of the winding core. The transmission rod is vertically mounted on the frame, and the other end of the transmission rod is helically connected to the other end of the first and second clamping ring sleeves. The transmission rod has two helical grooves, which are symmetrically arranged about the midpoint of the transmission rod and have opposite directions of rotation.

6. The winding device for a transformer according to claim 5, characterized in that, An electric motor is mounted on the frame, and the motor's shaft is coaxial with and fixedly connected to the transmission rod.

7. The winding device for a transformer according to claim 1, characterized in that, The wire feeding assembly includes a sliding block, a lead screw, and a guide rod. The lead screw is rotatably mounted on the frame, and its axis is parallel to the axis of the winding roller. The guide rod is fixedly mounted on the frame, and its axis is parallel to the axis of the lead screw. The sliding block is axially slidably connected to the outer periphery of the guide rod and is helically connected to the lead screw. Multiple conveying wheels are rotatably mounted on the sliding block, and the enameled wire is clamped between the multiple conveying wheels.

8. The winding device for a transformer according to claim 7, characterized in that, The frame is equipped with a drive mechanism, which can drive the lead screw to rotate around its own axis and drive the winding roller to rotate around its own axis.

9. The winding device for a transformer according to claim 8, characterized in that, The driving mechanism includes a first driving motor and a second driving motor. The shaft of the first driving motor is coaxial with and fixedly connected to the lead screw, and the shaft of the second driving motor is coaxial with and fixedly connected to the shaft of the winding roller.

10. The winding device for a transformer according to claim 1, characterized in that, The depth of the arc-shaped groove is adapted to the arc edge of the outer periphery of the wound iron core.

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