A hollow coil winding machine

Abstract

The present invention discloses a hollow coil winding machine, which belongs to the technical field of inductor processing equipment, including a machine platform and a winding mechanism, a material transfer mechanism, a jig conveying mechanism, a visual inspection mechanism and a material removal mechanism installed on the machine platform; the winding mechanism includes a lifting device, a lower winding device, an upper winding device, a wire clamping device, a wire cutting device and a material taking device; the upper winding device is used to provide wire to the lower winding device and drive the wire to rotate, the lower winding device and the upper winding device cooperate to wind the wire into a spiral coil, the wire clamping device is used to tighten one end of the wire, the wire cutting device is used to cut the two ends of the coil to form a pair of pins, and the material taking device is used to take the cut coil from the lower winding device and transfer it to the tooling jig of the material transfer mechanism. With such a design, the wire can be wound to form a coil with a pair of pins at both ends without relying on the inductor skeleton as the winding center, and the entire winding process can be fully automated, thereby improving the inductor production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of inductance production equipment, and in particular to a hollow coil winding machine. Background Art

[0002] One-piece molded inductors, also known as one-piece inductors, powder alloy inductors or molded inductors, include magnets and coil windings. The coil windings are die-cast by burying the magnets in the metal magnetic powder. The commonly used surface mount device (SMD) pins are directly formed on the surface of the product as the lead pins of the coil winding body. As the main frequency of the central processing unit (CPU) of computers and mobile phones increases, the requirements for stable power supply and filtering are also increasing. One-piece molded inductors can work for a long time under high current conditions while providing stable power supply for the CPU. In addition, the good material properties of one-piece molded inductors and the special structural design make the inductor structure more stable, with lower impedance, better seismic performance, and high conversion efficiency, and have begun to be more widely used. The one-piece inductor includes a spiral coil located in the middle and pins extending outward from both ends of the coil.

[0003] In the existing inductor winding machine, during the inductor winding process, the inductor frame is first installed on the winding shaft, and then the wire is wound on the frame to form an inductor. The wire cannot be wound alone to form a spiral coil without relying on the inductor frame; and the coil of the one-piece molded inductor needs to be wound and formed independently of the inductor frame. Therefore, it is necessary to design a winding machine that can directly wind the wire into a coil without relying on the inductor frame. Summary of the invention

[0004] Therefore, the object of the present invention is to provide a hollow coil winding machine to solve the technical problem that the existing inductor winding machine cannot wind the wire into a coil without relying on the inductor frame.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A hollow coil winding machine comprises a machine platform and a winding mechanism installed on the machine platform;

[0007] The winding mechanism comprises a winding frame, a lifting device, a lower winding device, an upper winding device, a wire clamping device, a wire cutting device and a material taking device;

[0008] The lifting device includes a lifting drive component installed on the machine platform, and a mounting plate driven by the lifting drive component to reciprocate along the Z-axis direction;

[0009] The lower winding device comprises a lower reel driving member and a lifting plate driving member mounted on the mounting plate, a lower reel assembly driven by the lower reel driving member to rotate around its own axis, and a lifting plate driven by the lifting plate driving member to reciprocate along the Z-axis direction;

[0010] The lower reel assembly includes: a lower reel driven by the lower reel driving member to rotate around its own axial direction, a forming pin shaft arranged in the lower reel and rotating relative to the lower reel in the circumferential direction and sliding relative to the axial direction, a movable reel movably connected to the forming pin shaft along the axial direction of the forming pin shaft and having one end extending outward from the center position of the end of the lower reel, a first elastic member elastically arranged between the forming pin shaft and the movable reel and elastically driving one end of the movable reel to extend outward from the end of the lower reel, and connected to the forming pin shaft. A pair of forming pins at one end and one end of which can extend outward from the end of the lower scroll, a push plate sleeved on the outside of the lower scroll and fixedly connected to the shaft of the forming pin, a stopper sleeve sleeved and fixed on the outside of the lower scroll, a second elastic member elastically arranged between the stopper sleeve and the push plate and elastically driving the push plate to move in a direction close to the lower scroll driving member; a rolling support member located below the push plate is provided at one end of the lifting plate; when the lifting plate driving member drives the lifting plate to rise, the rolling support member drives the push plate to overcome the elastic force of the second elastic member and move upward;

[0011] The upper winding device includes: a spline seat installed on the winding frame, a spline shaft installed on the spline seat and arranged coaxially with the lower reel, which rotates around its own axial direction, a flying fork assembly sleeved on the outer periphery of the lower end of the spline shaft and fixed and slidable relative to the spline shaft in the circumferential direction, an upper reel coaxially arranged inside the spline shaft and fixedly connected to the flying fork assembly at the lower end, a clamping sleeve fixedly connected to the lower end of the upper reel and located directly above the lower reel, a spline shaft driving member driving the spline shaft to rotate around its own axial direction, and a spline shaft driving member driving the upper reel to move along its own axial direction. An upper reel driving member; a wire routing channel for the wire to pass through is provided inside the upper reel, a wire guide cavity connected to the lower end of the wire routing channel is provided inside the compression sleeve, a main wire guide wheel for guiding the direction of the wire is provided inside the wire guide cavity, and the flying fork assembly comprises a flying fork mounting block fixed circumferentially relative to the spline shaft and axially relative to the upper reel, a flying fork fixed on the flying fork mounting block and with one end extending toward the outer periphery of the compression sleeve, a tensioning wheel mounted on the flying fork and used for guiding the direction of the wire, and a wire nozzle mounted on the flying fork for guiding the wire to one side of the movable reel;

[0012] The wire clamping device comprises: a wire clamping claw mounting plate, a wire clamping claw opening and closing driving member mounted on the wire clamping claw mounting plate, a pair of wire clamping claws driven by the wire clamping claw opening and closing driving member to close to clamp the wire or open to loosen the wire, and a traction driving member that drives the wire clamping claw opening and closing driving member to reciprocate along the Y-axis direction to pull the wire;

[0013] The tangent device includes: a tangent mounting plate, a first tangent fork driving member and a second tangent fork driving member installed on the tangent mounting plate and arranged opposite to each other, a first tangent fork driven by the first tangent fork driving member to open and close to cut one end of the wire, a second tangent fork driven by the second tangent fork driving member to open and close to cut the other end of the wire, a tangent Z-axis driving member used to drive the tangent mounting plate to reciprocate along the Z-axis direction, and a tangent X-axis driving member used to drive the tangent Z-axis driving member to reciprocate along the X-axis direction.

[0014] The material picking device includes: a coil clamp mounting plate, a pressure rod driving block installed on the coil clamp mounting plate, a pressure rod fixed to the pressure rod driving block at one end away from the coil clamp mounting plate and used for pressing down the movable reel to extend into the coil formed by winding on the movable reel, a coil claw opening and closing driving member installed on the coil clamp mounting plate, a pair of coil claws driven by the coil claw opening and closing driving member to close to clamp the coil or open to loosen the coil, a material picking Z-axis driving member used to drive the coil clamp mounting plate to reciprocate along the Z-axis direction, and a material picking Y-axis driving member installed under the winding machine frame and used to drive the material picking Z-axis driving member to reciprocate along the Y-axis direction.

[0015] Furthermore, the lower winding device, the upper winding device, the wire clamping device, the wire cutting device and the material picking device are each provided with two groups, the two groups of the lower winding devices are installed at opposite ends of the same mounting plate, the two groups of the upper winding devices and the two groups of the material picking devices are installed on the same winding frame; the two groups of the material picking devices are located in the middle of the two groups of the upper winding devices, and the two groups of the wire cutting devices are located on opposite sides of the two groups of the upper winding devices.

[0016] Furthermore, the two lifting plate driving members drive the same lifting plate to reciprocate along the Z-axis direction, and rolling support members respectively located below the two push plates are provided at opposite ends of the lifting plate.

[0017] Furthermore, a limiting ring is fixed on the mounting plate, the lifting plate is inserted into the limiting ring, and the limiting ring is used to limit the rising height of the lifting plate.

[0018] Furthermore, the outer wall of the lower scroll shaft is provided with a plurality of first strip slide grooves, and the length direction of the first strip slide grooves is arranged along their own axial direction; a limit pin is fixedly connected between the push plate and the forming pin shaft, and the length direction of the limit pin is arranged along the radial direction of the lower scroll shaft, and the limit pin passes through the first strip slide groove and slides along the length direction of the first strip slide groove.

[0019] Furthermore, a clamping shaft is fixed to the lower end of the clamping sleeve, and a downwardly protruding clamping head is provided at the lower end of the clamping shaft. The outer diameter of the clamping head matches the outer diameter of the end of the lower reel, and a positioning hole is provided in the middle of the lower end of the clamping head, and the movable reel is suitable for extending into the positioning hole.

[0020] Furthermore, the flying fork assembly also includes a dummy fork fixed on the flying fork mounting block, and the dummy fork and the flying fork are symmetrically arranged on opposite sides of the clamping sleeve.

[0021] Furthermore, a hot air blowing pipe is installed on the winding machine frame, the outlet of the hot air blowing pipe is facing the wire nozzle, and the hot air blowing pipe is used to blow hot air to the wire delivered from the wire nozzle.

[0022] Furthermore, the hollow coil winding machine further comprises a material transfer mechanism, a jig conveying mechanism, a visual inspection mechanism and a material unloading mechanism installed on the machine platform;

[0023] The winding mechanism is provided with two groups; the two groups of winding mechanisms and the visual inspection mechanism are arranged in sequence along the X-axis direction, the visual inspection mechanism is used to perform appearance inspection on the coil on the tooling jig; the tooling jig is used to place the coil formed after the wire is wound;

[0024] The jig conveying mechanism is arranged on the same side of the two groups of the winding mechanisms and the visual inspection mechanism; the jig conveying mechanism comprises a jig loading device, a jig conveying device and a jig unloading device, the length direction of the jig conveying device is arranged along the X-axis direction, and the jig loading device and the jig unloading device are located at both ends of the length direction of the jig conveying device; the jig loading device is used to transfer an unloaded tooling jig to one end of the jig conveying device, the jig conveying device is used to convey an unloaded tooling jig from one end to the other end along the X-axis direction, and the jig unloading device is used to transfer the tooling jig at the other end of the jig conveying device to the material transfer mechanism;

[0025] The material transfer mechanism comprises: a transfer platform arranged between the two groups of the winding mechanisms, the visual inspection mechanism and the fixture conveying mechanism, an X-axis driving member of the transfer platform for driving the transfer platform to perform linear reciprocating motion along the X-axis, and four groups of transfer devices installed on the transfer platform for clamping or loosening the tooling fixture; the coils grabbed by the material picking device are used to be placed on the tooling fixture above the transfer device;

[0026] The material transfer mechanism also includes a group of first jig transfer devices, three groups of second jig transfer devices and a group of third jig transfer devices sequentially arranged along the X-axis direction; the jig unloading device is used to transfer the tooling jig on the jig conveying mechanism to the first jig transfer device, the first jig transfer device is used to transfer the tooling jig to a group of the transfer devices closest to the jig unloading device, the second jig transfer device is used to transfer the tooling jig between two adjacent groups of the transfer devices, the third jig transfer device is used to transfer the tooling jig on a group of the transfer devices closest to the jig loading device, and the jig loading device is used to transfer the tooling jig on the third jig transfer device to the jig conveying mechanism;

[0027] The unloading mechanism is located at one side of a group of the transfer devices closest to the jig loading device, and is used to transfer the coils on the tooling jig above the group of the transfer devices closest to the jig loading device to the unloading rack.

[0028] Furthermore, the transfer device comprises: a transfer Z-axis driving member fixed on the transfer platform, a transfer clamp mounting plate driven by the transfer Z-axis driving member to reciprocate along the Z-axis direction, a pair of transfer clamp opening and closing driving members installed on the transfer clamp mounting plate, a pair of transfer clamps driven by the transfer clamp opening and closing driving member to move closer to each other to clamp the tooling fixture or away from each other to release the tooling fixture;

[0029] The jig feeding device comprises: a jig feeding frame mounted on the machine platform, a feeding jaw Y-axis driving member mounted on the jig feeding frame, a feeding jaw Z-axis driving member driven by the feeding jaw Y-axis driving member to reciprocate along the Y-axis direction, a feeding jaw opening and closing driving member driven by the feeding jaw Z-axis driving member to reciprocate along the Z-axis direction, and a pair of the feeding jaws driven by the feeding jaw opening and closing driving member to close to grab the tooling jig or to loosen to release the tooling jig;

[0030] The jig conveying device comprises: a jig conveying frame mounted on the machine platform, a conveying belt mounted on the jig conveying frame for conveying tooling jigs along the X-axis direction, and a belt driving member mounted on the jig conveying frame for driving the conveying belt to circulate;

[0031] The jig unloading device comprises: a jig unloading frame mounted on the machine platform, a unloading jaw Y-axis driving member mounted on the jig unloading frame, a unloading jaw Z-axis driving member driven by the unloading jaw Y-axis driving member to reciprocate along the Y-axis direction, an unloading jaw opening and closing driving member driven by the unloading jaw Z-axis driving member to reciprocate along the Z-axis direction, and a pair of unloading jaws driven by the unloading jaw opening and closing driving member to close to grab the tooling jig or to loosen to release the tooling jig;

[0032] The transfer device comprises: a transfer Z-axis driving member fixed on the transfer platform, a transfer clamp mounting plate driven by the transfer Z-axis driving member to reciprocate along the Z-axis direction, a pair of transfer clamp opening and closing driving members installed on the transfer clamp mounting plate, and a pair of transfer clamps driven by the transfer clamp opening and closing driving member to move closer to each other to clamp the tooling fixture or away from each other to release the tooling fixture;

[0033] The first fixture transfer device comprises: a first pallet for carrying a tooling fixture, a first pallet Y-axis driving member for driving the first pallet to reciprocate along the Y-axis direction, and a first pallet Z-axis driving member for driving the first pallet Y-axis driving member to reciprocate along the Z-axis direction;

[0034] The second fixture transfer device includes: a second pallet for carrying the tooling fixture, a second pallet Y-axis driving member driving the second pallet to reciprocate along the Y-axis direction, a second pallet Z-axis driving member driving the second pallet Y-axis driving member to reciprocate along the Z-axis direction, and a second pallet X-axis driving member driving the second pallet Z-axis driving member to reciprocate along the X-axis direction;

[0035] The third fixture transfer device comprises: a third pallet for carrying a tooling fixture, a third pallet Y-axis driving member for driving the third pallet to reciprocate along the Y-axis direction, and a third pallet Z-axis driving member for driving the third pallet Y-axis driving member to reciprocate along the Z-axis direction;

[0036] The first pallet, the second pallet and the third pallet are all pallets with the same structure; the pallet is provided with a placement groove for placing tooling and a pair of slots passing through the bottom wall of the placement groove and one of the side walls of the groove, and a pair of transfer clamps are suitable for extending into a pair of slots to lift the tooling on the placement groove upward or extending out of the slot to place the tooling on the placement groove.

[0037] The technical solution of the present invention has the following advantages:

[0038] 1. In the hollow coil winding machine provided by the present invention, before the wire is wound, the wire is conveyed to the lead-in cavity in the compression sleeve through the wire routing channel inside the upper reel, and the wire is guided by the main lead-in wheel in the lead-in cavity and then extends to the tensioning wheel on the flying fork, and then the wire is guided by the wire nozzle and extends to the position directly below the compression sleeve. During the wire winding process, the lifting drive of the lower winding device drives the mounting plate and the lower winding device to move upward along the Z-axis direction, and the lifting plate drive drives the lifting plate to move upward along the Z-axis direction. The lifting plate drives the push plate through the rolling support to overcome the elastic force of the second elastic member and move upward along the Z-axis direction. The forming pin shaft and the movable reel in the lower reel move upward along the Z-axis direction under the action of the push plate, and a pair of forming pins at the ends of the movable reel and the forming pin shaft extend outward from the end of the lower reel. At this time, the movable reel is located at the axial center position of the end of the lower reel, and the pair of forming pins are located at the position of the end of the lower reel that deviates from the axial center. There is a gap between a pair of forming pins and the movable reel for the wire to pass through; at the same time, the upper reel driving member of the upper winding device drives the upper reel to move downward along the Z-axis direction, and the flying fork assembly and the upper reel move downward along the Z-axis direction synchronously. At this time, the clamping sleeve is located directly above the lower reel, and the wire extends into the gap between the pair of forming pins and the movable reel; the traction driving member of the wire clamping device drives the wire clamping claw opening and closing driving member to move along the Y-axis direction toward the lower reel, and the wire clamping claw opening and closing driving member drives a pair of wire clamping claws to close to clamp the end of the wire, and the traction driving member drives the wire clamping claw opening and closing driving member to retreat a distance along the Y-axis direction, and the wire is pulled The wire is wound spirally around the movable reel as the flying fork assembly rotates, thereby forming a spiral coil. During the winding process, in order to ensure that the two pins of the coil are located on opposite sides of the coil, the stopping position of the flying fork after winding is located on the side of the movable reel that is away from the opening and closing driving member of the wire clamping claw, that is, the upper wire mouth of the flying fork when the flying fork stops after winding. The wire direction and the wire clamping claw opening and closing driving member tightening the wire direction are both set along the Y-axis direction; then the wire tangent Z-axis driving member and the wire tangent X-axis driving member of the wire tangent device drive the wire tangent mounting plate to move to the corresponding position, at this time, the first wire tangent fork in the open state on the wire tangent mounting plate is aligned with the wire between the coil and the wire clamping claw opening and closing driving member, and the second wire tangent fork in the open state on the wire tangent mounting plate is aligned with the wire between the coil and the wire nozzle, the first wire tangent fork driving member drives the first wire tangent fork to close, and the second wire tangent fork driving member drives the second wire tangent fork to close, so as to cut the wires at both ends of the coil to form a coil with pins at opposite ends;Finally, the upper reel driving member drives the upper reel to move upward along the Z-axis direction to make room for material picking, and the lifting plate driving member drives the lifting plate to move downward along the Z-axis direction. The upward thrust exerted on the push plate disappears, and the forming pin shaft and a pair of forming pins thereon move downward along the Z-axis direction under the elastic force of the second elastic member, and a pair of forming pins are retracted from the end of the lower reel into the interior of the lower reel. The material picking Y-axis driving member of the material picking device drives the coil clamp mounting plate and the pressure rod driving block to move to the corresponding positions. At this time, the pressure rod on the pressure rod driving block is located directly above the movable reel, and a pair of coil claws in an open state are located on opposite sides of the pressure rod. The material picking Z-axis driving member of the material picking device drives the pressure rod to descend a certain distance in the Z-axis direction, and the movable reel is pressed by the pressure rod. After the pressure is overcome, the first elastic member retracts inwards to overcome the elastic force of the first elastic member, and the coil originally sleeved on the outer periphery of the movable reel is sleeved on the outer periphery of the ejector pin. The coil claw opening and closing driving member drives a pair of coil claws to close to clamp the coil on the outer periphery of the ejector pin. Then, the material taking Z-axis driving member and the material taking Y-axis driving member drive the coil clamp mounting plate to retract to just above the transfer component. The coil claw opening and closing driving member drives a pair of coil claws to release the coil, and the coil falls into the jig on the transfer component, thereby realizing the full automation of the winding process of the coil with a spiral shape in the middle and a pair of pins at both ends. It is not necessary to wind the coil on an inductor skeleton of a specific shape, which is convenient for subsequent appearance inspection of the coil, pin bending and other operations, and is conducive to improving the production efficiency of inductor coils. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a three-dimensional structural schematic diagram of a hollow coil winding machine in an embodiment of the present invention;

[0041] Figure 2 A top view of a hollow coil winding machine according to an embodiment of the present invention;

[0042] Figure 3 It is a schematic diagram of the three-dimensional structure of two sets of winding mechanisms and material transfer mechanisms on the machine platform in an embodiment of the present invention;

[0043] Figure 4 Schematic diagram of the three-dimensional structure of the winding mechanism in an embodiment of the present invention;

[0044] Figure 5 It is a schematic diagram of the structure of the lifting device, the wire cutting device, the wire clamping device and the lower winding device in the embodiment of the present invention;

[0045] Figure 6 It is a schematic structural diagram of a lifting device and a lower winding device in an embodiment of the present invention;

[0046] Figure 7 It is a schematic structural diagram of a lower reel assembly, a lifting plate and a rolling support member in an embodiment of the present invention;

[0047] Figure 8 An exploded schematic diagram of a lower scroll assembly in an embodiment of the present invention;

[0048] Fig. 9 It is a schematic diagram of the connection relationship between the forming pin shaft, the movable reel and the first elastic member in an embodiment of the present invention;

[0049] Fig.10 It is a schematic diagram of the structure of the upper winding device, the material taking device, the wire pressing device, and the hot air blowing pipe on the winding machine frame in an embodiment of the present invention;

[0050] Fig.11 Schematic diagram of the connection relationship between the spline shaft, the flying fork assembly, the upper reel and the clamping sleeve in the embodiment of the present invention;

[0051] Fig.12 It is a structural schematic diagram of a material taking device in an embodiment of the present invention;

[0052] Fig.13 It is a schematic diagram of the structure of a coil formed by winding wire in an embodiment of the present invention;

[0053] Fig.14 It is a schematic diagram of the structure of the tooling fixture in an embodiment of the present invention;

[0054] Fig.15 It is a schematic diagram of the installation structure of the material transfer mechanism and the fixture conveying mechanism on the machine platform in an embodiment of the present invention;

[0055] Fig.16 It is a structural schematic diagram of a material moving mechanism in an embodiment of the present invention;

[0056] Fig.17 Schematic diagram of the structure of the first jig transfer device, the second jig transfer device and the third jig transfer device in an embodiment of the present invention;

[0057] Fig.18 It is a schematic diagram of the structure of a jig loading device, a jig conveying device and a jig unloading device in an embodiment of the present invention;

[0058] Fig.19 Schematic diagram of the structure of the support plate in the embodiment of the present invention;

[0059] Fig. 20 It is a schematic diagram of the structure in which a tooling fixture is placed on a first support plate in an embodiment of the present invention.

[0060] Description of reference numerals:

[0061] 1. Machine;

[0062] 2. Winding mechanism;

[0063] 21. Winding machine frame;

[0064] 22. lifting device; 221. lifting drive member; 222. mounting plate; 223. limiting ring;

[0065] 23, lower winding device; 231, lower reel driving member; 232, lifting plate driving member; 233, lower reel assembly; 2331, lower reel; 23311, first strip slide; 23312, second strip slide; 2332, forming pin shaft; 2333, movable reel; 2334, first elastic member; 2335, forming pin; 2336, push plate; 2337, stopper sleeve; 2338, limit pin; 2339, limit roller; 234, lifting plate; 235, rolling support member;

[0066] 24, upper winding device; 241, spline seat; 242, spline shaft; 243, flying fork assembly; 2431, flying fork mounting block; 2432, flying fork; 2433, tensioning wheel; 2434, wire nozzle; 2435, false fork; 244, upper reel; 245, clamping sleeve; 246, spline shaft driving member; 247, upper reel driving member; 248, main lead wheel; 249, clamping shaft; 2491, clamping head;

[0067] 25. Wire clamping device; 251. Wire clamping claw mounting plate; 252. Wire clamping claw opening and closing driving member; 253. Wire clamping claw; 254. Traction driving member; 255. Carrying plate; 256. Wire clamping claw Z-axis driving member;

[0068] 26. tangent device; 261. tangent mounting plate; 262. first tangent fork driving member; 263. second tangent fork driving member; 264. first tangent fork; 265. second tangent fork; 266. tangent Z-axis driving member; 267. tangent X-axis driving member;

[0069] 27. Material taking device; 271. Coil clamp mounting plate; 272. Pressure rod driving block; 273. Pressure rod; 274. Coil claw opening and closing driving member; 275. Coil claw; 276. Material taking Z-axis driving member; 277. Material taking Y-axis driving member;

[0070] 28. Wire pressing device; 281. movable wire pressing plate; 282. wire pressing Y-axis driving member; 283. wire pressing Z-axis driving member;

[0071] 29. Hot air blowing pipe;

[0072] 3. Material transfer mechanism;

[0073] 31. Transfer platform;

[0074] 32. X-axis driving parts of transfer platform;

[0075] 33. Transfer device; 331. Transfer Z-axis driving member; 332. Transfer clamp mounting plate; 333. Transfer clamp opening and closing driving member; 334. Transfer clamp;

[0076] 34. First fixture transfer device; 341. First pallet; 342. First pallet Y-axis driving member; 343. First pallet Z-axis driving member;

[0077] 35. Second fixture transfer device; 351. Second pallet; 352. Second pallet Y-axis driving member; 353. Second pallet Z-axis driving member; 354. Second pallet X-axis driving member;

[0078] 36. The third fixture transfer device; 361. The third pallet; 362. The third pallet Y-axis driving member; 363. The third pallet Z-axis driving member;

[0079] 4. Jig conveying mechanism;

[0080] 41. Jig feeding device; 411. Jig feeding frame; 412. Feeding jaw Y-axis driving member; 413. Feeding jaw Z-axis driving member; 414. Feeding jaw opening and closing driving member; 415. Feeding jaw;

[0081] 42. jig conveying device; 421. jig conveying frame; 422. conveying belt; 423. belt driving member;

[0082] 43. Jig unloading device; 431. Jig unloading rack; 432. Unloading jaw Y-axis driving member; 433. Unloading jaw Z-axis driving member; 434. Unloading jaw opening and closing driving member; 435. Unloading jaw;

[0083] 5. Visual inspection agency;

[0084] 6. Unloading mechanism;

[0085] 7. Pay-off mechanism;

[0086] 8. Fixture; 81. Coil installation slot; 811. Circular slot; 812. Long strip slot;

[0087] 9. Coil; 91. Pin;

[0088] 10. a support plate; 101. a placement slot; 102. a slot. DETAILED DESCRIPTION

[0089] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0090] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0091] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] like Figure 1 A hollow coil winding machine shown in the figure comprises a machine table 1 and a winding mechanism 2, a material transfer mechanism 3, a jig conveying mechanism 4, a visual inspection mechanism 5, a material discharge mechanism 6 and a wire release mechanism 7 installed on the machine table 1. There are two groups of winding mechanisms 2 and visual inspection mechanisms 5, and the two groups of winding mechanisms 2 and visual inspection mechanisms 5 are arranged in sequence along the X-axis direction; the jig conveying mechanism 4 is arranged on the same side of the two winding mechanisms 2 and visual inspection mechanisms 5; the material transfer mechanism 3 is located between the two groups of winding mechanisms 2 and jig conveying mechanisms 4. It should be noted that the X-axis direction in this application is the length direction of the machine table 1, the Y-axis direction is the width direction of the machine table 1, and the Z-axis direction is the height direction of the machine table 1.

[0093] Among them, the jig conveying mechanism 4 is used to provide jigs to the material transfer mechanism 3 and transfer the jigs on the material transfer mechanism 3 to the next station. The wire release mechanism 7 is used to provide wire to the winding mechanism 2, and the winding mechanism 2 is used to wind the wire into a coil and place it on the jig of the material transfer mechanism 3. The visual inspection mechanism 5 is used to perform appearance inspection on the coil formed by winding, and the unloading mechanism 6 is used to transfer the coil on the jig that has passed the visual inspection to the unloading tray.

[0094] like Figure 3 and Figure 4 As shown, the winding mechanism 2 includes a winding frame 21, a lifting device 22, a lower winding device 23, an upper winding device 24, a wire clamping device 25, a wire cutting device 26, a material taking device 27 and a wire pressing device 28.

[0095] Among them, the winding frame 21 is erected on the machine 1. The lifting device 22 is installed on the machine 1, and the lifting device 22 is used to drive the lower winding device 23 to reciprocate along the Z-axis direction. The wire pressing device 28 is installed above the winding frame 21, and the wire pressing device 28 is used to clamp the wire being transported to keep the wire in a tensioned state. The upper winding device 24 is installed on the winding frame 21, and the upper winding device 24 is used to provide wire to the lower winding device 23 and drive the wire to rotate. The lower winding device 23 is installed on the lifting device 22, and the lower winding device 23 is used to cooperate with the upper winding device 24 to wind the wire into a spiral coil 9 (such as Fig.13 ). The wire clamping device 25 is located on one side of the machine 1, and is used to tighten one end of the wire when winding. The wire cutting device 26 is installed on the machine 1, and is used to cut the two ends of the wire after winding into the coil 9 to form the coil 9 with pins 91 at both ends. The material taking device 27 is installed on the winding frame 21, and is used to take the cut coil 9 from the lower winding device 23 and transfer it to the tooling fixture 8 (as shown in FIG. 1 ) of the material transfer mechanism 3. Fig.14 shown).

[0096] like Figure 4 As shown, the lifting device 22 is provided with one group, and the lower winding device 23, the upper winding device 24, the wire clamping device 25, the wire cutting device 26, the material taking device 27 and the wire pressing device 28 are each provided with two groups. The two groups of upper winding devices 24, the two groups of material taking devices 27 and the two groups of wire pressing devices 28 are all installed on the winding machine frame 21; the two groups of lower winding devices 23 are both installed on the lifting device 22. The two groups of material taking devices 27 are located in the middle of the two groups of upper winding devices 24, the two groups of wire cutting devices 26 are fixed on the machine table 1 and are located on the opposite sides of the two groups of upper winding devices 24; the two groups of wire clamping devices 25 are installed on the side of the winding machine frame 21 facing away from the fixture conveying mechanism 4. With such an arrangement, the winding process of two groups of coils 9 can be completed on the same winding machine frame 21, thereby improving the winding efficiency of the winding mechanism 2; and the lifting device 22 can simultaneously drive the two groups of lifting devices 22 to reciprocate along the Z-axis direction, thereby improving the compactness of the winding mechanism 2; the position arrangement of the lower winding device 23, the upper winding device 24, the wire clamping device 25, the wire cutting device 26 and the material taking device 27 can achieve a compact design of the winding mechanism 2 while avoiding interference between different devices during operation, which is beneficial to reducing the volume of the entire hollow coil winding machine.

[0097] like Figure 4 , Figure 5 and Figure 6 As shown, the lifting device 22 includes a lifting drive 221 installed on the machine platform 1, and a mounting plate 222 driven by the lifting drive 221 to reciprocate along the Z-axis direction; the mounting plate 222 is located directly below the top plate of the winding frame 21. The lifting drive 221 is specifically a motor screw transmission mechanism, and the two sets of lower winding devices 23 are installed at opposite ends of the same mounting plate 222.

[0098] like Figure 4 and Figure 5 As shown, the wire clamping device 25 comprises a carrier plate 255, a wire clamping claw Z-axis driving member 256 driving the carrier plate 255 to reciprocate along the Z-axis direction, two sets of traction driving members 254 mounted on the carrier plate 255, a wire clamping claw mounting plate 251 driven by the traction driving member 254 to reciprocate along the Y-axis direction, a wire clamping claw opening and closing driving member 252 fixed on the wire clamping claw mounting plate 251, and a pair of wire clamping claws 253 driven by the wire clamping claw opening and closing driving member 252 to close to clamp the wire or open to loosen the wire. After the pair of wire clamping claws 253 clamp one end of the wire, the traction driving member 254 can drive the wire clamping claw mounting plate 251, the wire clamping claw opening and closing driving member 252 and the pair of wire clamping claws 253 to reciprocate along the Y-axis direction to pull the wire, so that the wire remains in a tensioned state. The thread clamping claw Z-axis driving component 256 and the traction driving component 254 are specifically motor screw transmission mechanisms, and the thread clamping claw opening and closing driving component 252 is specifically a cylinder.

[0099] like Figure 4 and Figure 5 As shown, the tangent device 26 includes: a tangent mounting plate 261, a first tangent fork driving member 262 and a second tangent fork driving member 263 installed on the tangent mounting plate 261 and arranged opposite to each other, a first tangent fork 264 driven by the first tangent fork driving member 262 to open and close to cut one end of the wire, a second tangent fork 265 driven by the second tangent fork driving member 263 to open and close to cut the other end of the wire, a tangent Z-axis driving member 266 used to drive the tangent mounting plate 261 to reciprocate along the Z-axis direction, and a tangent X-axis driving member 267 used to drive the tangent Z-axis driving member 266 to reciprocate along the X-axis direction. After the winding of the coil 9 is completed, the first tangent fork driving member 262 and the second tangent fork driving member 263 are driven to the corresponding positions by the tangent X-axis driving member 267 and the tangent Z-axis driving member 266, and the first tangent fork driving member 262 drives the first tangent fork 264 to close and cut one end of the wire, and the second tangent fork driving member 263 drives the second tangent fork 265 to close and cut the other end of the wire. The tangent X-axis driving member 267 and the tangent Z-axis driving member 266 are specifically cylinders, and the first tangent fork driving member 262 and the second tangent fork driving member 263 are specifically motors; the first tangent fork 264 and the second tangent fork 265 are scissor-type structures.

[0100] like Figure 6 As shown, the lower winding device 23 includes a lower reel driving member 231 and a lifting plate driving member 232 mounted on the mounting plate 222, a lower reel assembly 233 driven by the lower reel driving member 231 to rotate around its own axis, and a lifting plate 234 driven by the lifting plate driving member 232 to reciprocate along the Z-axis direction. The lower reel driving member 231 is specifically a servo motor, and the lifting plate driving member 232 is specifically a cylinder.

[0101] like Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the lower reel assembly 233 includes: a lower reel 2331 driven by the lower reel driving member 231 to rotate around its own axial direction, a forming pin shaft 2332 arranged in the lower reel 2331 and rotating relative to the lower reel 2331 in the circumferential direction and sliding relative to the axial direction, a movable reel 2333 movably connected to the forming pin shaft 2332 along the axial direction of the forming pin shaft 2332 and one end of which can extend outward from the center position of the end of the lower reel 2331, and a movable reel 2333 elastically arranged between the forming pin shaft 2332 and the movable reel 2333 and driven by elastic force A first elastic member 2334 with one end extending outward from the end of the lower reel 2331, a pair of forming pins 2335 connected to the end of the forming pin shaft 2332 and one end of which can extend outward from the end of the lower reel 2331, a push plate 2336 sleeved on the outside of the lower reel 2331 and fixedly connected to the forming pin shaft 2332, a stopper sleeve 2337 sleeved and fixed on the outside of the lower reel 2331, and a second elastic member (not shown) elastically arranged between the stopper sleeve 2337 and the push plate 2336 and whose elastic force drives the push plate 2336 to move in a direction close to the lower reel driving member 231. Two pairs of rolling support members 235 located below the pair of push plates 2336 are provided at opposite ends of the lifting plate 234; when the lifting plate driving member 232 drives the lifting plate 234 to rise, the rolling support member 235 drives the push plate 2336 to move upward to overcome the elastic force of the second elastic member. When the lower reel driving member 231 drives the lower reel 2331 to rotate, the push plate 2336 rotates synchronously with the lower reel 2331, and the push plate 2336 and the rolling support member 235 are in rolling contact to reduce friction therebetween.

[0102] like Figure 6 As shown, a limiting ring 223 is fixed on the mounting plate 222 , and the lifting plate 234 is inserted into the limiting ring 223 . The limiting ring 223 is used to limit the rising height of the lifting plate 234 .

[0103] like Figure 8As shown, the outer wall of the lower scroll 2331 is provided with four strip-shaped slide grooves, and the length direction of the four strip-shaped slide grooves is arranged along the axial direction of the lower scroll 2331, and the angle between two adjacent strip-shaped slide grooves is 90 degrees. The four strip-shaped slide grooves are respectively two first strip-shaped slide grooves 23311 and two second strip-shaped slide grooves 23312, the first strip-shaped slide grooves 23311 are closed grooves, and the second strip-shaped slide grooves 23312 are open grooves. A limit pin 2338 is arranged through the forming pin shaft 2332, and the length direction of the limit pin 2338 is arranged along the radial direction of the lower scroll 2331, and the parts of the two ends of the limit pin 2338 extending out of the forming pin shaft 2332 can slide in the two first strip-shaped slide grooves 23311, and at the same time, the push plate 2336 and the two ends of the limit pin 2338 are fixedly connected. A pair of limiting rollers 2339 are also connected to the outer periphery of the forming pin shaft 2332. When the forming pin shaft 2332 and the lower scroll shaft 2331 slide relative to each other along the axial direction, the limiting rollers 2339 can roll in the second strip slide groove 23312 to reduce the friction between the lower scroll shaft 2331 and the forming pin shaft 2332.

[0104] like Fig.10 and Fig.11 As shown, the upper winding device 24 includes: a spline seat 241 installed on the winding frame 21, a spline shaft 242 installed on the spline seat 241 and rotatable around its own axial direction and arranged coaxially with the lower reel 2331, a flying fork assembly 243 sleeved on the outer periphery of the lower end of the spline shaft 242 and fixed and sliding relative to the spline shaft 242 in the circumferential direction, an upper reel 244 coaxially arranged inside the spline shaft 242 and fixedly connected to the flying fork assembly 243 at the lower end, a clamping sleeve 245 fixedly connected to the lower end of the upper reel 244 and located directly above the lower reel 2331, a spline shaft driving member 246 for driving the spline shaft 242 to rotate around its own axial direction, and an upper reel driving member 247 for driving the upper reel 244 to move along its own axial direction.

[0105] like Fig.11 As shown, the upper reel 244 is provided with a routing channel for the wire to pass through, the compression sleeve 245 is provided with a lead-in cavity connected to the lower end of the routing channel, and the lead-in cavity is provided with a main lead-in wheel 248 for guiding the direction of the wire. The flying fork assembly 243 includes a flying fork mounting block 2431 fixed relative to the spline shaft 242 in the circumferential direction and relatively to the upper reel 244 in the axial direction, a flying fork 2432 fixed on the flying fork mounting block 2431 and one end extending toward the outer periphery of the compression sleeve 245, a tensioning wheel 2433 installed on the flying fork 2432 and guiding the direction of the wire, and a wire nozzle 2434 installed on the flying fork 2432 for guiding the wire to one side of the movable reel 2333.

[0106] like Fig.11As shown, a clamping shaft 249 is fixed to the lower end of the clamping sleeve 245, and a downwardly protruding clamping head 2491 is provided at the lower end of the clamping shaft 249, and the outer diameter of the clamping head 2491 matches the outer diameter of the end of the lower reel 2331. A positioning hole is provided in the middle of the lower end of the clamping head 2491, and the movable reel 2333 is suitable for extending into the positioning hole. During the winding process, the clamping head 2491 abuts against the movable reel 2333 to prevent the wire from deviating during the winding process.

[0107] like Fig.11 As shown, the flying fork assembly 243 also includes a false fork 2435 fixed on the flying fork mounting block 2431, and the false fork 2435 and the flying fork 2432 are symmetrically arranged on opposite sides of the compression sleeve 245. The setting of the false fork 2435 is conducive to maintaining balance during the rotation of the flying fork assembly 243.

[0108] like Fig.10 and Fig.11 As shown, a hot air blowing pipe 29 is also installed on the winding frame 21, and the outlet of the hot air blowing pipe 29 is toward the wire nozzle 2434. The hot air blowing pipe 29 is used to blow hot air to the wire delivered from the wire nozzle 2434 to improve the bending performance of the wire and prevent the wire from breaking due to sudden excessive force during the winding process.

[0109] like Fig.10 As shown, the wire pressing device 28 includes a wire pressing Z-axis driving member fixed on the spline seat 241, a wire pressing bracket driven by the wire pressing Z-axis driving member to reciprocate along the Z-axis direction, a wire pressing Y-axis driving member 282 and a fixed wire pressing plate installed on the wire pressing bracket, and a movable wire pressing plate 281 arranged opposite to the fixed wire pressing plate and driven by the wire pressing Y-axis driving member 282 to reciprocate along the Y-axis direction. When the movable wire pressing plate 281 and the fixed wire pressing plate are attached to each other, the movable wire pressing plate 281 and the fixed wire pressing plate cooperate to clamp the wire material so that the wire material is conveyed downward in a tensioned state.

[0110] like Fig.12 As shown, the material picking device 27 includes: a coil clamp mounting plate 271, a pressure rod driving block 272 installed on the coil clamp mounting plate 271, a pressure rod 273 fixed to the pressure rod driving block 272 away from the end of the coil clamp mounting plate 271 and used to press down the movable reel 2333 to extend into the coil 9 formed by winding on the movable reel 2333, a coil claw opening and closing driving member 274 installed on the coil clamp mounting plate 271, a pair of coil claws 275 driven by the coil claw opening and closing driving member 274 to close to clamp the coil 9 or open to release the coil 9, a material picking Z-axis driving member 276 for driving the coil clamp mounting plate 271 to reciprocate along the Z-axis direction, and a material picking Y-axis driving member 277 installed below the winding machine frame 21 and used to drive the material picking Z-axis driving member 276 to reciprocate along the Y-axis direction.

[0111] The winding working principle of this winding mechanism 2 is as follows: before winding the wire, the wire pressing device 28 clamps the wire to keep the wire in a taut state, and the wire is transported to the lead-in cavity in the clamping sleeve 245 through the wiring channel inside the upper reel 244. After the wire is guided by the main lead-in wheel 248 in the lead-in cavity and the tensioning wheel 2433 on the flying fork 2432, it is guided to the position directly below the clamping sleeve 245 through the wire nozzle 2434. During the wire winding process, the lifting drive 221 of the lower winding device 23 drives the mounting plate 222 and the lower winding device 23 to move upward along the Z-axis direction, the lifting plate driving member 232 drives the lifting plate 234 to move upward along the Z-axis direction, and the lifting plate 234 drives the push plate 2336 through the rolling support member 235 to overcome the elastic force of the second elastic member and move upward along the Z-axis direction. The forming pin shaft 2332 and the movable reel 2333 in the lower reel 2331 move upward along the Z-axis direction under the action of the push plate 2336, and a pair of forming pins 2335 at the ends of the movable reel 2333 and the forming pin shaft 2332 extend outward from the end of the lower reel 2331. At this time, the movable reel 2333 is located at the axial center position of the end of the lower reel 2331, and a pair of forming pins 2335 are located at the position where the end of the lower reel 2331 deviates from the axial center. There is a gap between the pair of forming pins 2335 and the movable reel 2333 for the wire to pass through. At the same time, the upper reel driving member 247 of the upper winding device 24 drives the upper reel 244 to move downward along the Z-axis direction, and the flying fork assembly 243 and the upper reel 244 move downward along the Z-axis direction synchronously. At this time, the clamping sleeve 245 is located directly above the lower reel 2331, and the wire extends into the gap between the pair of forming pins 2335 and the movable reel 2333. The traction driving member 254 of the clamping device 25 drives the clamping claw opening and closing driving member 252 to move in the direction close to the lower reel 2331 along the Y-axis direction, and the clamping claw opening and closing driving member 252 drives a pair of clamping claws 253 to close to clamp the end of the wire, and the traction driving member 254 drives the clamping claw opening and closing driving member 252 to retreat a distance along the Y-axis direction, and the wire is pulled out to a certain length. Afterwards, the lower reel driving member 231 drives the lower reel 2331 to rotate around its own axis, and the wire is spirally wound around the movable reel 2333 under the action of a pair of forming pins 2335; at the same time, the spline shaft driving member 246 drives the spline shaft 242, the flying fork assembly 243 and the upper reel 244 to rotate around the axis of the upper reel 244, and the wire is spirally wound around the movable reel 2333 as the flying fork assembly 243 rotates, thereby winding the wire into a spiral coil 9. In order to ensure that the two pins 91 of the coil 9 are located on opposite sides of the coil 9 during the winding process, the stopping position of the flying fork 2432 after the winding is completed is located on the side of the movable reel 2333 that is away from the wire clamping claw opening and closing driving member 252, that is, when the flying fork 2432 stops after winding, the wire direction of the wire nozzle 2434 on the flying fork 2432 and the wire tightening direction of the wire clamping claw opening and closing driving member 252 are both set along the Y-axis direction.Then, the tangent Z-axis driving component 266 and the tangent X-axis driving component 267 of the tangent device 26 drive the tangent mounting plate 261 to move to the corresponding position. At this time, the first tangent fork 264 in the open state on the tangent mounting plate 261 is aligned with the wire between the coil 9 and the wire clamping claw opening and closing driving component 252, and the second tangent fork 265 in the open state on the tangent mounting plate 261 is aligned with the wire between the coil 9 and the wire nozzle 2434. The first tangent fork driving component 262 drives the first tangent fork 264 to close, and the second tangent fork driving component 263 drives the second tangent fork 265 to close, so as to cut the wires at both ends of the coil 9 to form a coil 9 with pins 91 at both ends. Finally, the upper scroll drive 247 drives the upper scroll 244 to move upward along the Z-axis direction to make room for material removal, and the lifting plate drive 232 drives the lifting plate 234 to move downward along the Z-axis direction. The upward thrust exerted on the push plate 2336 disappears, and the molding pin shaft 2332 and a pair of molding pins 2335 thereon move downward along the Z-axis direction under the elastic force of the second elastic member, and a pair of molding pins 2335 retract from the end of the lower scroll 2331 into the interior of the lower scroll 2331. The Y-axis driving member 277 of the material picking device 27 drives the coil clamp mounting plate 271 and the pressure rod driving block 272 to move to the corresponding positions. At this time, the pressure rod 273 on the pressure rod driving block 272 is located directly above the movable reel 2333, and a pair of coil claws 275 in an open state are located on opposite sides of the pressure rod 273. The Z-axis driving member 276 of the material picking device 27 drives the pressure rod 273 to descend a certain distance along the Z-axis direction. After the movable reel 2333 is subjected to the pressure of the pressure rod 273, it overcomes the elastic force of the first elastic member 2334 and retracts inwardly. The coil 9 originally sleeved on the outer periphery of the movable reel 2333 is sleeved on the outer periphery of the ejector pin, and the coil claw opening and closing driving member 274 drives a pair of coil claws 275 to close to clamp the coil 9 on the outer periphery of the ejector pin, and then the Z-axis driving component 276 and the Y-axis driving component 277 drive the coil clamp mounting plate 271 to retract to just above the material transfer mechanism 3, and the coil claw opening and closing driving component 274 drives a pair of coil claws 275 to release the coil 9, and the coil 9 falls into the tooling fixture 8 on the transfer assembly, thereby realizing the full automation of the winding process of the coil 9 with a spiral shape in the middle and a pair of pins 91 at both ends. There is no need to wind the coil 9 on an inductor skeleton of a specific shape, which is convenient for subsequent appearance inspection, pin bending and other operations of the coil 9, and is beneficial to improving the production efficiency of inductor coils.

[0112] like Figure 1 , Figure 2 and Fig.15As shown, the jig conveying mechanism 4 includes a jig loading device 41, a jig conveying device 42 and a jig unloading device 43; the length direction of the jig conveying device 42 is arranged along the X-axis direction, and the jig loading device 41 and the jig unloading device 43 are located at both ends of the length direction of the jig conveying device 42. The jig loading device 41 is used to transfer the unloaded tooling jig 8 to one end of the jig conveying device 42, the jig conveying device 42 is used to convey the unloaded tooling jig 8 along the X-axis direction to the other end of the jig conveying device 42, and the jig unloading device 43 is used to transfer the tooling jig 8 at the other end of the jig conveying device 42 to the material transfer mechanism 3. The material transfer mechanism 3 drives the tooling jig 8 to move along the X-axis direction and pass through two sets of winding mechanisms 2 and the visual inspection mechanism 5 in sequence. The two sets of winding mechanisms 2 are used to wind the wire to form a coil 9 with pins 91 at both ends and place the coil 9 on the material transfer mechanism 3, and the tooling jig 8 on the material transfer mechanism 3 is used to place the coil 9 formed after the wire is wound. The visual inspection mechanism 5 is used to perform appearance inspection on the coil 9 on the jig 8 above the material transfer mechanism 3 from two different directions. The direction in which the material transfer mechanism 3 conveys the jig 8 is opposite to the direction in which the jig conveying device 42 conveys the jig 8. The jig 8 is circulated and conveyed between the jig loading device 41, the jig conveying device 42, the jig unloading device 43 and the material transfer mechanism 3. The unloading mechanism 6 is located at one end of the material transfer mechanism 3 close to the jig loading device 41. The unloading mechanism 6 is used to transfer the coil 9 on the jig 8 that has passed the visual inspection to the unloading tray, completing the full automation of the winding process of the inductor coil 9.

[0113] like Fig.15 and Fig.16 As shown, the material transfer mechanism 3 includes a transfer platform 31, an X-axis drive member 32 of the transfer platform, four groups of transfer devices 33 and five groups of fixture transfer devices. Among them, the length direction of the transfer platform 31 is arranged along the X-axis direction, the four groups of transfer devices 33 are fixed on the transfer platform 31 and are evenly spaced along the length direction of the transfer platform 31, and the X-axis drive member 32 of the transfer platform is used to drive the transfer platform 31 and the four groups of transfer devices 33 thereon to perform linear reciprocating motion along the X-axis direction at the same time. Specifically, the X-axis drive member 32 of the transfer platform is specifically a motor screw linear transmission module. Specifically, since each group of winding mechanisms 2 can wind two coils 9 at the same time, two groups of winding mechanisms 2 can wind four coils 9 at the same time; in order to realize the synchronous unloading of the two groups of winding mechanisms 2, each group of winding mechanisms 2 corresponds to two groups of transfer devices 33, and the tooling fixtures 8 of the four groups of transfer devices 33 are respectively used to place the coils 9 removed from one of the winding stations. The four groups of transfer devices 33 are driven by the X-axis driving member 32 of the transfer platform to move synchronously along the X-axis, thereby improving the production efficiency of the hollow coil winding machine.

[0114] like Fig.16As shown, the structures of the four groups of transfer devices 33 are the same. The transfer devices 33 include: a transfer Z-axis driving member 331 fixed on the transfer platform 31, a transfer clamp mounting plate 332 driven by the transfer Z-axis driving member 331 to reciprocate along the Z-axis direction, a pair of transfer clamp opening and closing driving members 333 installed on the transfer clamp mounting plate 332, and a pair of transfer clamps 334 driven by the transfer clamp opening and closing driving member 333 to move closer to each other to clamp the tooling fixture 8 or away from each other to loosen the tooling fixture 8. Specifically, the transfer Z-axis driving member 331 is fixed on the transfer platform 31 through a support plate, and the transfer Z-axis driving member 331 and the transfer clamp opening and closing driving member 333 are both cylinders.

[0115] like Fig.17 As shown, the five sets of jig transfer devices include a set of first jig transfer devices 34, three sets of second jig transfer devices 35 and a set of third jig transfer devices 36 arranged in sequence from the jig unloading device 43 to the jig loading device 41 along the X-axis direction. The jig loading device 41 is used to transfer the tooling jig 8 on the third jig transfer device 36 to the jig conveying device 42, the jig conveying device 42 is used to convey the tooling jig 8 to the jig unloading device 43 in a straight line along the X-axis direction, and the jig unloading device 43 is used to transfer the tooling jig 8 to the first jig transfer device 34. Fig.15 As shown, each transfer device 33 is used to transfer the jig 8 between two adjacent jig transfer devices, and the three groups of second jig transfer devices 35 are used to transfer the jig 8 between two adjacent transfer devices 33. The four groups of transfer devices 33 and the three groups of second jig transfer devices 35 cooperate to finally transfer the jig 8 on the first jig transfer device 34 to the third jig transfer device 36. During this transfer process of the jig 8, firstly, the two groups of winding mechanisms 2 sequentially place the wound coils 9 on the jig 8 above the transfer device 33, then the visual inspection mechanism 5 performs an appearance inspection on the coils 9 on the jig 8 above the third jig transfer device 36, and finally the unloading mechanism 6 transfers the coils 9 on the jig 8 that have passed the visual inspection to the unloading tray. After the coil 9 on the jig 8 is transferred away by the unloading mechanism 6 , the jig 8 is in an unloaded state, and the jig loading device 41 can transfer the unloaded jig 8 to the jig conveying device 42 to realize the cyclic transfer of the jig 8 .

[0116] like Fig.17As shown, the first jig transfer device 34 and the third jig transfer device 36 have the same structure; the three sets of second jig transfer devices 35 have the same structure. The first jig transfer device 34 includes: a first pallet 341 for carrying the tooling jig 8 transferred by the jig unloading device 43, a first pallet Y-axis driving member 342 for driving the first pallet 341 to reciprocate along the Y-axis direction, and a first pallet Z-axis driving member 343 for driving the first pallet Y-axis driving member 342 to reciprocate along the Z-axis direction. Specifically, the first pallet Z-axis driving member 343 is fixed to the machine table 1 through a support plate, and the first pallet Y-axis driving member 342 and the first pallet Z-axis driving member 343 are both cylinders.

[0117] like Fig.17 As shown, the overall structure of the second jig transfer device 35 is similar to that of the first jig transfer device 34, and the only difference is that the second jig transfer device 35 additionally includes a second pallet X-axis drive 354, and the second pallet 351 can reciprocate in the three-axis directions of XYZ. Specifically, the second jig transfer device 35 includes: a second pallet 351 for carrying the tooling fixture 8, a second pallet Y-axis drive 352 for driving the second pallet 351 to reciprocate along the Y-axis direction, a second pallet Z-axis drive 353 for driving the second pallet Y-axis drive 352 to reciprocate along the Z-axis direction, and a second pallet X-axis drive 354 for driving the second pallet Z-axis drive 353 to reciprocate along the X-axis direction. The second pallet Y-axis drive 352 and the second pallet Z-axis drive 353 are both cylinders, and the second pallet X-axis drive 354 is a motor screw linear transmission module.

[0118] like Fig.17 As shown, the third jig transfer device 36 includes: a third pallet 361 for carrying the tooling jig 8, a third pallet Y-axis driving member 362 for driving the third pallet 361 to reciprocate along the Y-axis direction, and a third pallet Z-axis driving member 363 for driving the third pallet Y-axis driving member 362 to reciprocate along the Z-axis direction. Specifically, the third pallet Z-axis driving member 363 is fixed to the machine table 1 through a support plate, and the third pallet Y-axis driving member 362 and the first pallet Z-axis driving member 343 are both cylinders. After the unloading mechanism 6 transfers the coil 9 that has been tested on the tooling jig 8 above the third pallet 361 to the unloading tray, the jig unloading device 43 transfers the unloaded tooling jig 8 to the jig conveying device 42.

[0119] like Fig.19 and Fig. 20As shown, the first pallet 341, the second pallet 351 and the third pallet 361 are all pallets 10 with the same structure; the pallet 10 is provided with a placement groove 101 for placing the tooling fixture 8 and a groove bottom wall penetrating the placement groove 101 and a pair of slots 102 on one of the groove side walls; the placement groove 101 has the same shape as the tooling fixture 8. The fixture unloading device 43 is used to transfer the unloaded tooling fixture 8 to the placement groove 101 of the first pallet 341.

[0120] like Figure 2 , Fig.15 , Fig.16 , Fig.17 and Fig.18 As shown, in the process of transferring the jig 8 from the first jig transfer device 34 to the most upstream group of transfer devices 33. First, the transfer device 33 moves along the X-axis to a position aligned with the first jig transfer device 34 in the Y-axis direction under the drive of the transfer Z-axis driver 331, and the first pallet 341 moves to the top of the two pairs of transfer clamps 334 of the transfer device 33 under the joint drive of the first pallet Y-axis driver 342 and the first pallet Z-axis driver 343. Then, the two pairs of transfer clamps 334 move upward along the Z-axis under the drive of the transfer Z-axis driver 331, and the two pairs of transfer clamps 334 extend into the two slots 102 of the first pallet 341 respectively, and the two pairs of transfer clamps 334 move closer to each other under the drive of the transfer clamp opening and closing driver 333 to clamp the jig 8. Then, the first pallet 341 is driven by the first pallet Z-axis driving member 343 to descend a certain distance in the Z-axis direction, and the jigs 8 on the two pairs of transfer jaws 334 extend out of the placement slot 101. Finally, the first pallet 341 is driven by the first pallet Y-axis driving member 342 to retreat a certain distance in the Y-axis direction, and the two pairs of transfer jaws 334 and the jigs 8 clamped thereon are moved out of the side opening of the slot 102; the jigs 8 are transferred from the first jig transfer device 34 to a group of transfer devices 33 at the most upstream.

[0121] like Figure 2 , Fig.15 , Fig.16 , Fig.17 and Fig.18As shown, in the process of transferring the jig 8 from the transfer device 33 to the second jig transfer device 35. First, after the coil 9 is placed on the jig 8 on the transfer device 33, the transfer device 33 moves along the X-axis under the drive of the transfer Z-axis driver 331, and the second pallet 351 also moves along the X-axis under the drive of the second pallet X-axis driver 354, until the positions of the transfer device 33 and the second jig transfer device 35 in the Y-axis direction are aligned. Then, the second pallet 351 descends a certain distance in the Z-axis direction under the drive of the second pallet Z-axis driver 353, and the second pallet 351 advances a certain distance in the Y-axis direction under the drive of the second pallet Y-axis driver 352, and the second pallet 351 extends to the bottom of the jig 8 on the transfer device 33. Then, the two pairs of transfer clamps 334 are driven by the transfer clamp opening and closing driving member 333 to move away from each other to release the jig 8, and the second pallet 351 is driven by the second pallet Z-axis driving member 353 to rise a certain distance in the Z-axis direction, and the second pallet 351 lifts the jig 8 upward, and the jig 8 is transferred to the second pallet 351. After that, the second pallet 351 is driven by the second pallet Y-axis driving member 352 to retreat a certain distance in the Y-axis direction; at this time, the jig 8 is transferred from the transfer device 33 to the second jig transfer device 35. Finally, the second pallet 351 is driven by the second pallet X-axis driving member 354 to move to the next station along the X-axis, and then the jig 8 is transferred to the transfer device 33 of the next station using similar steps, thereby realizing the transfer of the jig 8 between different transfer devices 33. With such an arrangement, the jig 8 can pass through two groups of winding mechanisms 2 and two groups of visual inspection mechanisms 5 in sequence, completing the full automation of the winding process and the appearance inspection process; and it can realize the automatic transfer of multiple jigs 8 between adjacent transfer devices 33, so that the process of placing coils 9 on the jigs 8 of the two groups of transfer devices 33 and the process of performing two appearance inspections on the coils 9 of the jigs 8 on the other two groups of transfer devices 33 can be carried out simultaneously, greatly improving the production efficiency of the hollow coil winding machine. The process of transferring the jig 8 from the most downstream transfer device 33 to the third jig transfer device 36 is similar to the process of transferring the jig 8 from the second jig transfer device 35 to the transfer device 33, which will not be repeated here.

[0122] like Fig.18 As shown, the jig loading device 41 includes: a jig loading frame 411 installed on the machine table 1, a loading jaw Y-axis driving member 412 installed on the jig loading frame 411, a loading jaw Z-axis driving member 413 that is driven by the loading jaw Y-axis driving member 412 to reciprocate along the Y-axis direction, a loading jaw opening and closing driving member 414 that is driven by the loading jaw Z-axis driving member 413 to reciprocate along the Z-axis direction, and a pair of loading jaws 415 that are driven by the loading jaw opening and closing driving member 414 to close to grab the tooling jig 8 or to loosen to release the tooling jig 8.

[0123] During the process of the jig loading device 41 transferring the tooling jig 8 from the third jig transfer device 36 to the jig conveying device 42, a pair of loading jaws 415 are driven by the loading jaw Y-axis driving member 412 and the loading jaw Z-axis driving member 413 to move to the top of the third support plate 361, and the pair of loading jaws 415 are driven by the loading jaw opening and closing driving member 414 to close to grab the tooling jig 8; then the pair of loading jaws 415 are driven by the loading jaw Y-axis driving member 412 and the loading jaw Z-axis driving member 413 to move to the top of the jig conveying device 42, and the loading jaw Z-axis driving member 413 drives the loading jaws 415 to loosen to release the tooling jig 8, and the tooling jig 8 can be conveyed on the jig conveying device 42.

[0124] like Fig.18 As shown, the jig unloading device 43 has the same structure as the jig loading device 41. The jig unloading device 43 comprises: a jig unloading frame 431 mounted on the machine table 1, a unloading jaw Y-axis driving member 432 mounted on the jig unloading frame 431, a unloading jaw Z-axis driving member 433 driven by the unloading jaw Y-axis driving member 432 to reciprocate along the Y-axis direction, an unloading jaw opening and closing driving member 434 driven by the unloading jaw Z-axis driving member 433 to reciprocate along the Z-axis direction, and a pair of unloading jaws 435 driven by the unloading jaw opening and closing driving member 434 to close to grab the tooling jig 8 or to open to release the tooling jig 8. The process of the jig unloading device 43 transferring the tooling jig 8 from the jig conveying device 42 to the first jig transfer device 34 is the same as the process of the jig loading device transferring the tooling jig 8 from the third jig transfer device 36 to the jig conveying device 42, which will not be described in detail here.

[0125] like Fig.18 As shown, the jig conveying device 42 includes: a jig conveying frame 421 installed on the machine platform 1, a conveying belt 422 installed on the jig conveying frame 421 for conveying the tooling jig 8 along the X-axis direction, and a belt driving member 423 installed on the jig conveying frame 421 and used to drive the conveying belt 422 to circulate.

[0126] In summary, the hollow coil winding machine provided in the embodiment of the present invention can wind the wire to form a coil 9 with a pair of pins at both ends without relying on a skeleton as a winding center, and realize full automation of the entire winding process, thereby improving the inductor production efficiency.

[0127] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A hollow coil winding machine, characterized in that: It comprises a machine platform (1) and a winding mechanism (2) installed on the machine platform (1); The winding mechanism (2) comprises a winding frame (21), a lifting device (22), a lower winding device (23), an upper winding device (24), a wire clamping device (25), a wire cutting device (26) and a material taking device (27); The lifting device (22) comprises a lifting drive component (221) installed on the machine platform (1), and a mounting plate (222) driven by the lifting drive component (221) to reciprocate along the Z-axis direction; The lower winding device (23) comprises a lower reel driving member (231) and a lifting plate driving member (232) mounted on the mounting plate (222), a lower reel assembly (233) driven by the lower reel driving member (231) to rotate around its own axis, and a lifting plate (234) driven by the lifting plate driving member (232) to reciprocate along the Z-axis direction; The lower reel assembly (233) comprises: a lower reel (2331) driven by the lower reel driving member (231) to rotate around its own axis, a forming pin shaft (2332) arranged in the lower reel (2331) to rotate relative to the lower reel (2331) in the circumferential direction and to slide relative to the axial direction, a movable reel (2333) movably connected to the forming pin shaft (2332) along the axial direction of the forming pin shaft (2332) and having one end extending outward from the center position of the end of the lower reel (2331), a first elastic member (2334) elastically arranged between the forming pin shaft (2332) and the movable reel (2333) and having one end of the movable reel (2333) driven by elastic force to extend outward from the end of the lower reel (2331), and connected to the forming pin shaft (2332). The lower part (231) of the present invention is a pair of forming pins (2335) at the ends of the lower reel (2331) and one end of which can extend outward from the end of the lower reel (2331); a push plate (2336) sleeved on the outside of the lower reel (2331) and fixedly connected to the forming pin shaft (2332); a stopper sleeve (2337) sleeved and fixed on the outside of the lower reel (2331); a second elastic member elastically arranged between the stopper sleeve (2337) and the push plate (2336) and elastically driving the push plate (2336) to move in a direction close to the lower reel driving member (231); one end of the lifting plate (234) is provided below the push plate (2336); when the lifting plate driving member (232) drives the lifting plate (234) to rise, the lifting plate (234) drives the push plate (2336) to overcome the elastic force of the second elastic member and move upward; The upper winding device (24) comprises: a spline seat (241) mounted on the winding frame (21), a spline shaft (242) mounted on the spline seat (241) and arranged coaxially with the lower reel (2331) so as to rotate about its own axis, a flying fork assembly (243) sleeved on the outer periphery of the lower end of the spline shaft (242) and fixed to and sliding in a relative circumferential direction with the spline shaft (242), an upper reel (244) coaxially arranged inside the spline shaft (242) and fixedly connected at its lower end to the flying fork assembly (243), a clamping sleeve (245) fixedly connected to the lower end of the upper reel (244) and located directly above the lower reel (2331), a spline shaft driving member (246) driving the spline shaft (242) to rotate about its own axis, and a spline shaft driving member (246) driving the upper reel (244) to move along its own axis. An upper reel driving member (247); a wire routing channel for the wire to pass through is provided inside the upper reel (244); a wire guide cavity communicating with the lower end of the wire routing channel is provided inside the compression sleeve (245); a main wire guide wheel (248) for guiding the direction of the wire is provided inside the wire guide cavity; the flying fork assembly (243) comprises a flying fork mounting block (2431) fixed relative to the spline shaft (242) in the circumferential direction and relative to the upper reel (244) in the axial direction, a flying fork (2432) fixed on the flying fork mounting block (2431) and with one end extending toward the outer periphery of the compression sleeve (245); a tensioning wheel (2433) mounted on the flying fork (2432) and used for guiding the direction of the wire; and a wire nozzle (2434) mounted on the flying fork (2432) and used for guiding the wire to one side of the movable reel (2333); The wire clamping device (25) comprises: a wire clamping claw mounting plate (251), a wire clamping claw opening and closing driving member (252) mounted on the wire clamping claw mounting plate (251), a pair of wire clamping claws (253) driven by the wire clamping claw opening and closing driving member (252) to close to clamp the wire or open to loosen the wire, and a traction driving member (254) driving the wire clamping claw opening and closing driving member (252) to reciprocate along the Y-axis direction to pull the wire; The wire cutting device (26) comprises: a wire cutting installation plate (261), a first wire cutting fork driving member (262) and a second wire cutting fork driving member (263) mounted on the wire cutting installation plate (261) and arranged opposite to each other, a first wire cutting fork (264) driven by the first wire cutting fork driving member (262) to open and close so as to cut one end of the wire material, a second wire cutting fork (265) driven by the second wire cutting fork driving member (263) to open and close so as to cut the other end of the wire material, a wire cutting Z-axis driving member (266) used for driving the wire cutting installation plate (261) to reciprocate along the Z-axis direction, and a wire cutting X-axis driving member (267) used for driving the wire cutting Z-axis driving member (266) to reciprocate along the X-axis direction; The material taking device (27) comprises: a coil clamp mounting plate (271), a pressure rod driving block (272) mounted on the coil clamp mounting plate (271), a pressure rod (273) fixed to one end of the pressure rod driving block (272) away from the coil clamp mounting plate (271) and used to press down the movable reel (2333) so as to extend into the coil (9) formed by winding the wire on the movable reel (2333), and a coil claw mounted on the coil clamp mounting plate (271). An opening and closing driving member (274), a pair of coil claws (275) driven by the coil claw opening and closing driving member (274) to close to clamp the coil (9) or open to loosen the coil (9), a material picking Z-axis driving member (276) used to drive the coil clamp mounting plate (271) to reciprocate along the Z-axis direction, and a material picking Y-axis driving member (277) installed below the winding machine frame (21) and used to drive the material picking Z-axis driving member (276) to reciprocate along the Y-axis direction.

2. The hollow coil winding machine according to claim 1, characterized in that: The lower winding device (23), the upper winding device (24), the wire clamping device (25), the wire cutting device (26) and the material taking device (27) are each provided with two groups, the two groups of the lower winding device (23) are installed at opposite ends of the same mounting plate (222), the two groups of the upper winding device (24) and the two groups of the material taking devices (27) are installed on the same winding frame (21); the two groups of the material taking devices (27) are located in the middle of the two groups of the upper winding devices (24), and the two groups of the wire cutting devices (26) are located on opposite sides of the two groups of the upper winding devices (24).

3. The hollow coil winding machine according to claim 1, characterized in that: The two lifting plate driving members (232) drive the same lifting plate (234) to reciprocate along the Z-axis direction, and rolling support members (235) respectively located below the two push plates (2336) are provided at opposite ends of the lifting plate (234).

4. The hollow coil winding machine according to claim 1, characterized in that: A limiting ring (223) is fixed on the mounting plate (222), the lifting plate (234) is inserted into the limiting ring (223), and the limiting ring (223) is used to limit the rising height of the lifting plate (234).

5. The hollow coil winding machine according to claim 1, characterized in that: The outer wall of the lower scroll shaft (2331) is provided with a first strip-shaped slide groove (23311), and the length direction of the first strip-shaped slide groove (23311) is arranged along its own axial direction; a limit pin (2338) is fixedly connected between the push plate (2336) and the forming pin shaft (2332), and the length direction of the limit pin (2338) is arranged along the radial direction of the lower scroll shaft (2331), and the limit pin (2338) passes through the first strip-shaped slide groove (23311) and slides along the length direction of the first strip-shaped slide groove (23311).

6. The hollow coil winding machine according to claim 1, characterized in that: A clamping shaft (249) is fixed to the lower end of the clamping sleeve (245), and a downwardly protruding clamping head (2491) is provided at the lower end of the clamping shaft (249), and the outer diameter of the clamping head (2491) matches the outer diameter of the end of the lower reel (2331). A positioning hole is provided in the middle of the lower end of the clamping head (2491), and the movable reel (2333) is suitable for extending into the positioning hole.

7. The hollow coil winding machine according to claim 1, characterized in that: The flying fork assembly (243) further comprises a false fork (2435) fixed on the flying fork mounting block (2431), and the false fork (2435) and the flying fork (2432) are symmetrically arranged on opposite sides of the compression sleeve (245).

8. The hollow coil winding machine according to claim 1, characterized in that: A hot air blowing pipe (29) is also installed on the winding machine frame (21), and the outlet of the hot air blowing pipe (29) faces the wire nozzle (2434). The hot air blowing pipe (29) is used to blow hot air to the wire delivered from the wire nozzle (2434).

9. The hollow coil winding machine according to claim 1, characterized in that: The hollow coil winding machine further comprises a material transfer mechanism (3), a jig conveying mechanism (4), a visual inspection mechanism (5) and a material unloading mechanism (6) installed on the machine platform (1); The winding mechanism (2) is provided with two groups; the two groups of the winding mechanism (2) and the visual inspection mechanism (5) are arranged in sequence along the X-axis direction; the visual inspection mechanism (5) is used to perform appearance inspection on the coil (9) on the tooling fixture (8); the tooling fixture (8) is used to place the coil (9) formed after the wire is wound; The jig conveying mechanism (4) is arranged on the same side of the two groups of the winding mechanisms (2) and the visual inspection mechanism (5); the jig conveying mechanism (4) comprises a jig loading device (41), a jig conveying device (42) and a jig unloading device (43); the length direction of the jig conveying device (42) is arranged along the X-axis direction, and the jig loading device (41) and the jig unloading device (43) are located at two ends of the length direction of the jig conveying device (42); the jig loading device (41) is used to transfer an unloaded tooling jig (8) to one end of the jig conveying device (42); the jig conveying device (42) is used to transport an unloaded tooling jig (8) from one end to the other end along the X-axis direction; the jig unloading device (43) is used to transfer the tooling jig (8) at the other end of the jig conveying device (42) to the material transfer mechanism (3); The material transfer mechanism (3) comprises: a transfer platform (31) arranged between two groups of the winding mechanisms (2), the visual inspection mechanism (5) and the fixture conveying mechanism (4), a transfer platform X-axis driving member (32) for driving the transfer platform (31) to perform linear reciprocating motion along the X-axis, and four groups of transfer devices (33) installed on the transfer platform (31) for clamping or loosening the tooling fixture (8); the coil (9) captured by the material picking device (27) is used to be placed on the tooling fixture (8) above the transfer device (33); The material transfer mechanism (3) further comprises a group of first jig transfer devices (34), three groups of second jig transfer devices (35) and a group of third jig transfer devices (36) which are sequentially arranged along the X-axis direction; the jig unloading device (43) is used to transfer the tooling jig (8) on the jig conveying mechanism (4) to the first jig transfer device (34); the first jig transfer device (34) is used to transfer the tooling jig (8) to a group of the transfer devices (33) closest to the jig unloading device (43); the second jig transfer device (35) is used to transfer the tooling jig (8) between two adjacent groups of the transfer devices (33); the third jig transfer device (36) is used to transfer the tooling jig (8) on a group of the transfer devices (33) closest to the jig loading device (41); the jig loading device (41) is used to transfer the tooling jig (8) on the third jig transfer device (36) to the jig conveying mechanism (4); The unloading mechanism (6) is located on one side of a group of the transfer devices (33) closest to the jig loading device (41), and the unloading mechanism (6) is used to transfer the coil (9) on the tooling jig (8) above the group of the transfer devices (33) closest to the jig loading device (41) to the unloading rack.

10. The hollow coil winding machine according to claim 9, characterized in that: The jig loading device (41) comprises: a jig loading frame (411) mounted on the machine platform (1), a loading jaw Y-axis driving member (412) mounted on the jig loading frame (411), a loading jaw Z-axis driving member (413) driven by the loading jaw Y-axis driving member (412) to perform reciprocating motion along the Y-axis direction, a loading jaw opening and closing driving member (414) driven by the loading jaw Z-axis driving member (413) to perform reciprocating motion along the Z-axis direction, and a pair of the loading jaws (415) driven by the loading jaw opening and closing driving member (414) to close to grasp the tooling jig (8) or to open to release the tooling jig (8); The jig conveying device (42) comprises: a jig conveying frame (421) mounted on the machine platform (1), a conveying belt (422) mounted on the jig conveying frame (421) for conveying the tooling jig (8) along the X-axis direction, and a belt driving member (423) mounted on the jig conveying frame (421) for driving the conveying belt (422) to circulate; The jig unloading device (43) comprises: a jig unloading frame (431) mounted on the machine platform (1), a unloading jaw Y-axis driving member (432) mounted on the jig unloading frame (431), a unloading jaw Z-axis driving member (433) driven by the unloading jaw Y-axis driving member (432) to reciprocate along the Y-axis direction, a unloading jaw opening and closing driving member (434) driven by the unloading jaw Z-axis driving member (433) to reciprocate along the Z-axis direction, and a pair of unloading jaws (435) driven by the unloading jaw opening and closing driving member (434) to close to grasp the tooling jig (8) or to open to release the tooling jig (8); The transfer device (33) comprises: a transfer Z-axis driving member (331) fixed on the transfer platform (31); a transfer clamp mounting plate (332) driven by the transfer Z-axis driving member (331) to reciprocate along the Z-axis direction; a pair of transfer clamp opening and closing driving members (333) mounted on the transfer clamp mounting plate (332); and a pair of transfer clamps (334) driven by the transfer clamp opening and closing driving member (333) to move closer to each other to clamp the tooling fixture (8) or move away from each other to release the tooling fixture (8); The first fixture transfer device (34) comprises: a first pallet (341) for carrying the tooling fixture (8), a first pallet Y-axis driving member (342) for driving the first pallet (341) to reciprocate along the Y-axis direction, and a first pallet Z-axis driving member (343) for driving the first pallet Y-axis driving member (342) to reciprocate along the Z-axis direction; The second fixture transfer device (35) comprises: a second pallet (351) for carrying the tooling fixture (8), a second pallet Y-axis driving member (352) for driving the second pallet (351) to reciprocate along the Y-axis direction, a second pallet Z-axis driving member (353) for driving the second pallet Y-axis driving member (352) to reciprocate along the Z-axis direction, and a second pallet X-axis driving member (354) for driving the second pallet Z-axis driving member (353) to reciprocate along the X-axis direction; The third fixture transfer device (36) comprises: a third pallet (361) for carrying the tooling fixture (8), a third pallet Y-axis driving member (362) for driving the third pallet (361) to reciprocate along the Y-axis direction, and a third pallet Z-axis driving member (363) for driving the third pallet Y-axis driving member (362) to reciprocate along the Z-axis direction; The first support plate (341), the second support plate (351) and the third support plate (361) are all support plates (10) with the same structure; the support plate (10) is provided with a placement groove (101) for placing a tooling fixture (8), and a pair of slots (102) passing through the bottom wall of the placement groove (101) and one of the side walls of the groove; a pair of transfer clamps (334) are suitable for extending into the pair of slots (102) to lift the tooling fixture (8) on the placement groove (101) upwards, or extending out of the slots (102) to place the tooling fixture (8) on the placement groove (101).

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