A planar coil winding mechanism

Abstract

The present application provides a planar coil winding mechanism, which includes a coil fixing component and a height control component. The coil fixing component includes a coil shaft, a coil base, and a base positioning member. The coil shaft is located at the center of the coil base, and the top surface of the coil shaft extends beyond the top surface of the coil base, and the exceeding distance is not greater than the wire diameter of the winding coil. The coil base is fixed on the base positioning member, and at least one wire fixing groove is provided on the top surface of the coil base along the tangential direction of the coil shaft. The depth and width of the wire fixing groove are greater than the wire diameter of the winding coil. The height of the height control component is adjustable, and it is located directly above the coil fixing component. When winding the coil, the distance from the bottom surface of the height control component to the top surface of the coil base is equal to the wire diameter of the winding coil. The top surface of the coil shaft, the top surface of the coil base, and the bottom surface of the height control component are all planes extending in the horizontal direction.

Description

Technical Field

[0001] This application belongs to the technical field of planar coils, and particularly relates to a planar coil winding mechanism. Background Art

[0002] In cryophysics and superconductivity physics, a uniform magnetic field can be obtained by using a planar coil, which is used to provide a magnetic field environment or receive or emit signals. The flatness, uniformity of the coil, and stability under drastic temperature changes all have a great impact on the uniformity of the magnetic field. The greater the difference from an ideal coil, the greater the error in the magnetic field and signals. Generally, a slit is used as the mold for winding a planar coil. In order to wind a planar coil with high flatness, the height of the slit of the winding mold should match the wire diameter, and the height at each part should have high consistency. The uniformity of the coil and the stability under temperature changes are related to the winding tension. If the tension is small, the coil does not fit tightly enough, and the uniformity is poor; if the tension is too large, the height of the slit may be changed, affecting the flatness, and the wound coil has large stress and will deform under low-temperature impact.

[0003] In view of this, the present invention provides a new planar coil winding mechanism. Summary of the Invention

[0004] In view of this, the present application provides a planar coil winding mechanism to ensure the flatness, uniformity, and stability under drastic temperature changes of the wound coil.

[0005] The present application provides a planar coil winding mechanism, which includes a coil fixing component and a height control component. The coil fixing component includes a coil shaft, a coil base, and a base positioning member. The coil shaft is located at the center of the coil base, and the top surface of the coil shaft extends beyond the top surface of the coil base, and the extending distance is not greater than the wire diameter of the wound coil. The coil base is fixed on the base positioning member, and at least one wire fixing groove is formed on the top surface of the coil base along the tangential direction of the coil shaft. The depth and width of the wire fixing groove are greater than the wire diameter of the wound coil. The height of the height control component is adjustable, and it is located directly above the coil fixing component. When winding the coil, the distance from the bottom surface of the height control component to the top surface of the coil base is equal to the wire diameter of the wound coil. The top surface of the coil shaft, the top surface of the coil base, and the bottom surface of the height control component are all planes extending in the horizontal direction.

[0006] Wherein, the number of wire fixing grooves is more than two, the distances of each wire fixing groove from the center of the coil base increase in sequence, and the wire grooves do not cross on the top surface of the coil base.

[0007] Among them, the height control component includes a height control plate, a fine adjustment plate, a plurality of preloading bolts, a plurality of conical springs and a plurality of ball head bolts. The vertical height of the height control plate is adjustable. The preloading bolts correspond to the conical springs one by one and connect the height control plate and the fine adjustment plate evenly along the circumferential direction. The ball head bolts are evenly distributed along the circumference of the height control plate. After the ball head bolts are screwed into the threaded holes of the height control plate, the ball heads of the ball head bolts abut against the top surface of the fine adjustment plate.

[0008] Among them, the planar coil winding mechanism further includes a bottom plate, a column and an upper suspension plate. The bottom plate is horizontally arranged. The column is vertically arranged on the bottom plate. The upper suspension plate is fixed to the column and is parallel to the bottom plate. The coil fixing component is arranged on the bottom plate. The height control component further includes a height control plate lead screw. The height control plate is fixed to the upper suspension plate through the height control plate lead screw and its matching nut.

[0009] Among them, the fine adjustment plate is made of transparent Teflon material.

[0010] Among them, the planar coil winding mechanism further includes a rotating winding component. The rotating winding component includes a bobbin and a driving component. The driving component is used to drive the bobbin to rotate around the coil fixing component.

[0011] Among them, the driving component includes a motor, a motor bracket, a motor output connection component and a turntable. The motor is fixed through the motor bracket and its output shaft is arranged in the vertical direction. The motor output connection component is connected to the turntable. The turntable is hollowly arranged to provide an installation space for the coil fixing component. The bobbin is arranged on the turntable.

[0012] Among them, the coil fixing component further includes a turntable stator and a connecting piece. The rotating winding component further includes a turntable bearing. The turntable stator is arranged in the vertical direction. The connecting piece connects the base positioning piece and the turntable stator. The inner ring of the turntable bearing is matched with the turntable stator, and the outer ring of the turntable bearing is matched with the inner circle of the turntable.

[0013] Among them, the turntable stator is a four-section cylindrical structure with a diameter increasing from top to bottom. The four-section cylindrical structure successively includes a fixing part for providing support for the coil fixing component from bottom to top, a bearing support part for providing an axial shoulder for the turntable bearing, a bearing nesting part for nesting the turntable bearing, and a top cylinder.

[0014] Among them, the central hole of the hollowly arranged turntable is in a stepped shape with a smaller upper diameter and a larger lower diameter. The inner diameter of the upper part of the central hole matches the diameter of the top cylinder of the turntable stator, and the inner diameter of the lower part of the central hole matches the outer ring of the turntable bearing.

[0015] Among them, the base positioning piece includes an annular limiting part and a plurality of locking screws. A plurality of locking holes are arranged radially along the annular limiting part. The locking screws correspond to the locking holes one by one and are respectively screwed into the locking holes. The inner diameter of the annular limiting part is larger than the outer diameter of the coil base and the coil base is fixed through the locking screws. The height of the coil base is greater than the height of the annular limiting part.

[0016] Compared with the prior art, the planar coil winding mechanism of the present application includes a coil fixing component and a height control component. Specifically, the top surface of the coil shaft of the coil fixing component, the top surface of the coil base, and the bottom surface of the height control component are all planes extending in the horizontal direction, and it is satisfied that the coil shaft is arranged at the center of the coil base, the top surface of the coil shaft exceeds the top surface of the coil base, and the distance from the top surface of the coil base to the bottom surface of the height control component during the winding process is equal to the wire diameter of the wound coil. Through the above settings, the flatness, uniformity, and stability under drastic temperature changes during the coil winding process are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a three-dimensional structure diagram of a preferred embodiment of a planar coil winding mechanism of the present invention;

[0019] Figure 2 is Figure 1 a three-dimensional schematic diagram of a preferred embodiment of the coil base of the planar coil winding mechanism shown;

[0020] Figure 3 is Figure 1 a top view of the coil shaft and the coil base of the planar coil winding mechanism shown at the initial moment of coil winding;

[0021] Figure 4 is Figure 1 a top view of another preferred embodiment of the coil base of the planar coil winding mechanism shown;

[0022] Figure 5 is Figure 1 a three-dimensional enlarged view of the bottom plate of the planar coil winding mechanism shown;

[0023] Figure 6 is Figure 1 a bottom view of the upper suspension plate of the planar coil winding mechanism shown;

[0024] Figure 7 is Figure 1 a three-dimensional enlarged view of the height control component of the planar coil winding mechanism shown;

[0025] Figure 8 is Figure 7 a front view of the height control component shown;

[0026] Figure 9 is Figure 1 A three-dimensional enlarged view of the base positioning member of the planar coil winding mechanism shown;

[0027] Figure 10 is Figure 9 A sectional structure view of the base positioning member shown;

[0028] Figure 11 is Figure 1 A three-dimensional enlarged view of the connecting member of the planar coil winding mechanism shown;

[0029] Figure 12 is Figure 1 A three-dimensional enlarged view of the turntable stator of the planar coil winding mechanism shown;

[0030] Figure 13 is Figure 1 A sectional structure view of the turntable of the planar coil winding mechanism shown. Detailed implementation manners

[0031] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0032] A planar coil winding mechanism of the present invention at least includes a coil fixing assembly and a height control assembly. The coil fixing assembly includes a coil shaft, a coil base, and a base positioning member. The coil shaft is fixedly arranged at the center of the coil base, and the top surface of the coil shaft exceeds the top surface of the coil base, and the exceeding distance is not greater than the wire diameter of the wound coil. The coil base is fixed on the base positioning member. At least one wire fixing groove is opened on the top surface of the coil base along the tangent direction of the coil shaft. The depth and width of the wire fixing groove are greater than the wire diameter of the wound coil. The height control assembly is located directly above the coil fixing assembly, and the distance from its bottom surface to the top surface of the coil base is equal to the wire diameter of the wound coil. The top surface of the coil shaft, the top surface of the coil base, and the bottom surface of the height control assembly are all planes extending in the horizontal direction. Through the above technical solution, it can be ensured that during the coil winding process, the metal wire tightly adheres to the bottom surface of the height control assembly and the top surface of the coil fixing assembly when winding around the coil shaft, thereby ensuring the flatness and uniformity of the wound coil.

[0033] Specifically, Figures 1 to 13 A preferred embodiment of the planar coil winding mechanism of the present invention is given. In this preferred embodiment, the planar coil winding mechanism includes a frame 1, a coil fixing assembly 2, a rotating winding assembly 3, and a height control assembly 4.

[0034] Please refer to Figure 1 , the frame 1 includes a bottom plate 11, columns 12, a hanging plate 13 and anchor feet 14. The bottom plate 11 is horizontally arranged, the columns 12 are vertically arranged on the bottom plate 11, the hanging plate 13 is fixed to the columns 12 and the hanging plate 13 is parallel to the bottom plate 11. The number of the anchor feet 14 is multiple, and they are respectively arranged at the bottom corners of the bottom plate 11 for adjusting the levelness of the bottom plate 11.

[0035] Please also refer to Figure 5 , at both ends of the bottom plate 11, installation grooves 111 and 112 are respectively sunken from the top surface. A plurality of through holes are respectively penetrated through the bottoms of the installation grooves 111 and 112. The installation groove 111 is used for limiting the column 12, and the bottom plate 11 and the column 12 are fixedly connected by means of threaded connection. The installation groove 112 is used for positioning the turntable stator 26 of the coil fixing assembly 2 (which will be specifically described later).

[0036] Please also refer to Figure 6 , at the positions corresponding to the installation grooves 111 and 112 of the bottom plate 11 at both ends of the hanging plate 13, installation grooves 133 and large circular through holes 131 are respectively arranged. A plurality of through holes are penetrated through the installation groove 133. The installation groove 133 is used for positioning the column 12, and the hanging plate 13 and the column 12 are fixedly connected by means of threaded connection. The center of the large circular through hole 131 is vertically aligned with the center of the installation groove 111. Three small circular through holes 132 are evenly distributed along the circumferential direction on the periphery of the large circular through hole 131. The small circular through holes 132 are used for connecting the height control assembly 4.

[0037] Please also refer to Figure 1 , Figures 2 - 5 and Figures 9 - 12 , the coil fixing assembly 2 includes a coil shaft 21, a coil base 22, a base positioning member 24, a connecting member 23 and a turntable stator 26.

[0038] In this embodiment, the coil base 22 is a concentric ring structure, and its inner diameter is in tight fit with the coil shaft 21. In other embodiments, the coil base 22 and the coil shaft 21 can also be an integral structure. For example, in some application environments, when other parts need to be passed through the inside of the coil base, the coil base 22 and the coil shaft 21 can only be selected as an integral structure.

[0039] The top surface of the coil shaft 21 extends beyond the top surface of the coil base 22, and the extension distance is not greater than the wire diameter of the wound coil. At least one wire fixing groove is formed on the top surface of the coil base 22 along the tangential direction of the coil shaft 21. The depth and width of the wire fixing groove are greater than the wire diameter of the wound coil, so as to ensure that the starting and ending points of the winding are arranged in a layered manner with the plane of the wound coil, thereby ensuring the flatness of the wound coil. One wire fixing groove is applicable to the case of winding a coil with a single-strand wire. The design of multiple wire grooves can increase the number of strands of the metal wire for winding the coil. When there are multiple wire grooves, the distances of each wire fixing groove from the center of the coil base increase in sequence, and there is no intersection among the wire fixing grooves on the top surface of the coil base. Preferably, the innermost wire fixing groove is tangent to the coil shaft 21.

[0040] The coil base 22 is fixed on the base positioning member 24. Specifically, the base positioning member 24 includes an annular limiting portion 242 and a plurality of locking screws 25. A plurality of locking holes 241 are arranged along the radial direction of the annular limiting portion. The locking screws 25 correspond to the locking holes 241 one by one and are respectively screwed into the locking holes 241. The inner diameter of the annular limiting portion 24 is greater than the outer diameter of the coil base 22, and the coil base 22 is fixed by the locking screws 25. The height of the coil base 22 is greater than the height of the annular limiting portion 242. In this embodiment, the number of both the locking screws 25 and the locking holes 241 is 3. In other embodiments, the number of the locking screws 25 is not limited by this embodiment. In this embodiment, in addition to the annular limiting portion 242, the base positioning member 24 further includes a base 243 arranged below the annular positioning portion 242, and the base 243 is used to provide support for the coil base 22.

[0041] The connecting member 23 is arranged between the turntable stator 26 and the base positioning member 24. The connecting member 23 is fixed to the top of the turntable stator 26 by means of threaded connection, and its diameter is greater than the diameter at the top position of the turntable stator 26. The base positioning member 24 is fixed to the connecting member 23 by means of threaded connection.

[0042] The turntable stator 26 is arranged on the installation groove 112 of the bottom plate 11 in the vertical direction by means of threaded connection. The turntable stator 26 is a four-section cylindrical structure with a gradually increasing diameter from top to bottom. The four-section cylindrical structure sequentially includes a fixing portion 261 for providing support for the coil fixing assembly 2, a bearing support portion 262 for providing a shoulder for the turntable bearing 37 of the rotating winding assembly 3, a bearing nesting portion 263 for nesting the turntable bearing 37, and a top cylinder 264.

[0043] The height of the height control assembly 4 is adjustable. It is located directly above the coil fixing assembly 2. When winding the coil, the distance from the bottom surface of the height control assembly to the top surface of the coil base 22 is equal to the wire diameter of the wound coil. Please also combine Figure 1 、 Figure 7 and Figure 8, the height control component 4 includes a height control disk lead screw 41, a height control disk 42, a fine adjustment disk 43, a preloading bolt 44, a conical spring 45, and a ball head bolt 46.

[0044] The height control disk 42 is fixed to the upper suspension plate 13 through the height control disk lead screw 41 and its matching nut. In this embodiment, the number of height control disk lead screws 41 is 3, which are connected to the small round through holes 132 of the upper suspension plate 13 in one-to-one correspondence. In other embodiments, the number of small round through holes 132 and height control disk lead screws 41 is not limited by this embodiment. The height control disk lead screw 41 can be used to adjust the height of the height control disk 42. Generally, after the coil winding is completed, the height of the height control disk 42 and the fine adjustment disk 43 can be adjusted by driving the height control disk lead screw 41 to quickly remove the coil. When winding a new coil, the height of the fine adjustment disk 43 can also be initially adjusted by driving the height control disk lead screw 41 first.

[0045] The number of preloading bolts 44 is the same as the number of conical springs 45. The preloading bolts 44 and the conical springs 45 are in one-to-one correspondence and are evenly connected to the height control disk 42 and the fine adjustment disk 43 along the circumferential direction. In this embodiment, both the number of preloading bolts 44 and conical springs 45 is 3. After each conical spring 45 is sleeved on a preloading bolt 44, the preloading bolt 44 passes through the through hole provided on the height control disk 42 and is screwed into the threaded hole provided on the fine adjustment disk 43. The conical spring 45 is always in a compressed state, and its two ends respectively abut against the head step of the preloading bolt 44 and the top surface of the height control disk 42. In this embodiment, the number of ball head bolts 46 is 3, which are evenly distributed along the circumference of the height control disk 42. After the ball head bolts 46 are screwed into the threaded holes provided on the height control disk 42, the ball heads of the ball head bolts 46 abut against the top surface of the fine adjustment disk 43. Due to the arrangement of the preloading bolts 44, conical springs 45, and ball head bolts 46, the flatness of the fine adjustment disk 43 can be adjusted by screwing the ball head bolts 46, and fine adjustment can be achieved on the basis of the initial adjustment of the height of the fine adjustment disk 43. In other embodiments, the number of preloading bolts 44, conical springs 45, and ball head bolts 46 is not limited by this embodiment.

[0046] The adjustment distance of the height control disk lead screw 41 for adjusting the fine adjustment disk is much greater than the adjustment distance of the ball head bolt 46 for adjusting the fine adjustment disk 43. Therefore, the height control disk lead screw 41 is used to quickly adjust the height of the fine adjustment disk 43, and the ball head bolt 43 is used to continue to adjust the distance and parallelism between the bottom surface of the fine adjustment disk 43 and the top surface of the coil base 22 until the requirements are met when the distance between the bottom surface of the fine adjustment disk 43 and the top surface of the coil base 22 is close to the wire diameter.

[0047] Since during the coil winding process, the wire falls from the wire spool 31 into the gap between the coil base 22 and needs to be coated with an adhesive such as epoxy resin glue, in order to avoid the fine adjustment disk 43 being contaminated by the glue, preferably, the fine adjustment disk 43 is made of transparent Teflon material.

[0048] The rotating winding assembly 3 includes a bobbin 31 and a driving assembly. The driving assembly is used to drive the bobbin 31 to rotate around the coil fixing assembly 2. In other embodiments, the driving assembly can also be omitted, and manual winding can be directly adopted. In such a case, some components in the coil fixing assembly 2 can also be omitted, such as the turntable stator 26, the connecting member 23, etc.

[0049] In this embodiment, the driving assembly includes a motor 32, a motor bracket 33, a motor output connection assembly, and a turntable 36. The motor 32 is fixed to the frame 1 through the motor bracket 33. The output shaft of the motor 32 is arranged in the vertical direction. The motor output connection assembly is connected to the turntable 36. The turntable 36 is hollow to provide an installation space for the coil fixing assembly 2, and the bobbin 31 is arranged on the turntable.

[0050] Further, in this embodiment, the motor output connection assembly includes a belt 34 and a pulley 35. The pulley 35 is arranged on the output shaft of the motor 32, and the belt 34 is clamped into the pulley 35 and the belt groove recessed on the outer side of the turntable 36. In other embodiments, the motor output connection assembly can also be in the form of a gear-rack drive, etc.

[0051] Preferably, the rotating winding assembly 3 further includes a turntable bearing 37. The inner ring of the turntable bearing 37 is matched with the turntable stator, and the outer ring of the turntable bearing 37 is matched with the inner circle of the turntable. Specifically, the central hole of the hollow turntable 36 is stepped with a smaller upper part and a larger lower part. The inner diameter of the upper part of the central hole matches the diameter of the top cylinder of the turntable stator, and the inner diameter of the lower part of the central hole matches the outer ring of the turntable bearing. In other embodiments, the turntable bearing 37 can also be a plain bearing. In this way, the plain bearing can be arranged on the bottom plate 11, and thus, the turntable stator 36 can also be omitted.

[0052] Through the above settings, the axes of the large circular through hole 132 of the upper suspension plate 13, the height control plate 42, the fine adjustment plate 43, the coil base 22, the coil shaft 21, the base positioning member 23, the turntable stator 26, and the turntable bearing 37 coincide.

[0053] To ensure that the wire has sufficient tension during the coil winding process, preferably, the rotating winding assembly 3 further includes a rubber rod 38 that is parallel to and in contact with the bobbin 31. There is friction between the rubber rod 38 and the bobbin 31, and the bobbin 31 can only rotate under the action of a certain torque.

[0054] The bobbin 31 and the rubber rod 38 are rotatably arranged on the turntable 36. Specifically, the rotating winding assembly 3 further includes two lead screws 39. The bobbin 31 and the rubber rod 38 are respectively connected to the turntable 36 through a lead screw 39.

[0055] The working steps of the coil winding mechanism of the planar coil of the present invention for winding a coil include:

[0056] S1. Adjust the lead screw 41 of the height control plate so that the bottom surface of the fine adjustment plate 43 contacts the top surface of the coil shaft 21.

[0057] S2. Adjust the ball head bolt 46 so that the bottom surface of the fine adjustment plate 43 is separated from the top surface of the coil shaft 21 until the distance between the bottom surface of the fine adjustment plate 43 and the top surface of the coil base 22 is equal to the wire diameter. In this step, it is necessary to ensure that the distance between the bottom surface of the fine adjustment plate 43 and the top surface of the coil base 22 is equal everywhere.

[0058] S3. Install the spool 31 on which the wire for winding the coil is wound. Insert one end of the wire into the wire fixing groove 221 of the coil base 22 and firmly fix the end of the wire so that it will not loosen due to the tension during winding.

[0059] S4. Wind the coil: The motor 32 rotates, driving the turntable 36 to rotate. The wire is under tension and continuously peels off from the spool 31 and winds onto the coil base 22. During the gap from when the wire peels off the spool 31 to when it winds onto the coil base 22, an adhesive such as epoxy resin glue is applied. The glue is carried to the coil base 22, so that the wound coil becomes an integral body under the action of the adhesive. It should be noted that there are matching problems in three directions, namely the rotation direction of the motor, the winding direction of the wire, and the rotation direction of the spool. The rotation direction of the motor can be adjusted by changing the positive and negative poles of the power supply. The winding direction of the wire is related to the loading direction of the wire, and the rotation direction of the spool is also related to the installation orientation. These three directions can be adjusted to enable the mechanism to wind the wire smoothly.

[0060] In this step, the rotation speed of the motor 32 needs to be strictly controlled to observe the coil winding situation at any time. The wire winding tension drives the spool 31 to rotate against the friction of the rubber rod 39. The friction between the rubber rod 39 and the spool 31 can be changed by adjusting the size of the rubber rod 39 or the spool 31.

[0061] Instead of using the rotation of the motor 32 to drive the turntable 36, it is also feasible to manually drive the turntable 36. Further, removing the turntable 36 and winding by hand is also an implementation method.

[0062] In order to obtain a stable coil structure at different temperatures, it is necessary to ensure that the adhesive and the wire have similar thermal expansion / thermal contraction coefficients.

[0063] Compared with the prior art, the planar coil winding mechanism of the present application includes a coil fixing component 2 and a height control component 4. Specifically, the top surface of the coil shaft 21 of the coil fixing component 2, the top surface of the coil base 22, and the bottom surface of the height control component 4 are all planes extending in the horizontal direction, and it is satisfied that the coil shaft 21 is arranged at the center of the coil base 22, the top surface of the coil shaft 21 exceeds the top surface of the coil base 22, and the distance from the top surface of the coil base 22 to the bottom surface of the height control component 4 during the winding process is equal to the wire diameter of the wound coil. Through the above settings, the flatness, uniformity, and stability under drastic temperature changes during the coil winding process are ensured.

[0064] The above-described embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application and should all be included in the protection scope of the present application.

Claims

1. A planar coil winding mechanism, characterized in that, The planar coil winding mechanism includes a coil fixing assembly and a height control assembly. The coil fixing assembly includes a coil shaft, a coil base, and a base positioning member. The coil shaft is located at the center of the coil base, and the top surface of the coil shaft extends beyond the top surface of the coil base by a distance not greater than the wire diameter of the wound coil. The coil base is fixed to the base positioning member. At least one wire fixing groove is provided on the top surface of the coil base along the tangential direction of the coil shaft. The depth and width of the wire fixing groove are greater than the wire diameter of the wound coil. The height of the height control assembly is adjustable. It is located directly above the coil fixing assembly. When winding the coil, the distance from the bottom surface of the height control assembly to the top surface of the coil base is equal to the wire diameter of the wound coil. The top surface of the coil shaft, the top surface of the coil base, and the bottom surface of the height control assembly are all planes extending in the horizontal direction. The height control assembly includes a height control disc, a fine adjustment disc, a plurality of preloading bolts, a plurality of conical springs, and a plurality of ball head bolts. The vertical height of the height control disc is adjustable. The preloading bolts are in one-to-one correspondence with the conical springs and are evenly connected to the height control disc and the fine adjustment disc along the circumferential direction. The two ends of the conical spring respectively abut against the head step of the preloading bolt and the top surface of the height control disc. The ball head bolts are evenly distributed along the circumference of the height control disc. After the ball head bolts are screwed into the threaded holes of the height control disc, the ball heads of the ball head bolts abut against the top surface of the fine adjustment disc.

2. The planar coil winding mechanism according to claim 1, characterized in that, The number of the wire fixing grooves is more than two. The distances of each wire fixing groove from the center of the coil base increase in sequence, and the wire grooves do not cross on the top surface of the coil base.

3. The planar coil winding mechanism according to claim 2, characterized in that, The planar coil winding mechanism further includes a bottom plate, a column, and an upper suspension plate. The bottom plate is horizontally arranged. The column is vertically arranged on the bottom plate. The upper suspension plate is fixed to the column and is parallel to the bottom plate. The coil fixing assembly is arranged on the bottom plate. The height control assembly further includes a height control disc lead screw. The height control disc is fixed to the upper suspension plate through the height control disc lead screw and its matching nut.

4. The planar coil winding mechanism according to claim 2, wherein The fine adjustment disc is made of transparent Teflon material.

5. The planar coil winding mechanism according to claim 1, characterized in that, The planar coil winding mechanism further includes a rotating winding assembly. The rotating winding assembly includes a wire shaft and a driving assembly. The driving assembly is used to drive the wire shaft to rotate around the coil fixing assembly.

6. The planar coil winding mechanism according to claim 5, characterized in that, The driving assembly includes a motor, a motor bracket, a motor output connection assembly, and a turntable. The motor is fixed through the motor bracket and its output shaft is arranged in the vertical direction. The motor output connection assembly is connected to the turntable. The turntable is provided with a hollow interior for providing an installation space for the coil fixing assembly. The wire shaft is arranged on the turntable.

7. The planar coil winding mechanism according to claim 6, wherein, The coil fixing assembly further includes a turntable stator and a connecting member. The rotating winding assembly further includes a turntable bearing. The turntable stator is arranged in the vertical direction. The connecting member connects the base positioning member and the turntable stator. The inner ring of the turntable bearing is matched with the turntable stator, and the outer ring of the turntable bearing is matched with the inner circle of the turntable.

8. The planar coil winding mechanism according to claim 7, characterized in that, The turntable stator is a four-section cylindrical structure with a gradually increasing diameter from top to bottom. The four-section cylindrical structure successively includes a fixing part for providing support for the coil fixing component, a bearing support part for providing a shoulder for the turntable bearing, a bearing nesting part for nesting the turntable bearing, and a top cylinder from bottom to top.

9. The planar coil winding mechanism according to claim 8, characterized in that, The centrally located hollow hole of the turntable is in a stepped shape with a smaller upper part and a larger lower part. The inner diameter of the upper part of the central hole matches the diameter of the top cylinder of the turntable stator, and the inner diameter of the lower part of the central hole matches the outer diameter of the turntable bearing.

10. The planar coil winding mechanism according to claim 8, characterized in that, The base positioning member includes an annular limiting part and a plurality of locking screws. A plurality of locking holes are arranged radially along the annular limiting part. The locking screws correspond to the locking holes one by one and are respectively screwed into the locking holes. The inner diameter of the annular limiting part is larger than the outer diameter of the coil base, and the coil base is fixed by the locking screws. The height of the coil base is greater than the height of the annular limiting part.

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