A hollow coil winding mechanism with the starting and tail wires located outside the coil

Abstract

The present invention relates to the technical field of winding machines, and in particular to a hollow coil winding mechanism with the starting and tailing wires located outside the coil. The hollow coil winding mechanism with the starting and tailing wires located outside the coil comprises a frame, a punch assembly, a die assembly, a flying fork assembly, a wire pulling assembly, and a pre-storage wire assembly. The punch assembly comprises a first driving shaft, a punch plate, a punch, and a punch moving shaft. The die assembly comprises a second driving shaft, a wire passing hole, and a die plate. The wire pulling assembly is used to clamp the wire passing through the flying fork assembly and move it toward the pre-storage wire assembly, and the pre-storage wire assembly is used to clamp the starting wire and rotate it to store the wire when storing the wire or reverse the wire when unwinding the wire. During winding, the starting wire of each layer is wound by the pre-storage wire assembly for one circle, and the rest is wound by the flying fork assembly, so that each layer is compensated by the starting wire by one circle by the wire storage wheel, so that the starting wire is always outside the coil, and the tail wire is normally wound on the outside.

Description

Technical Field

[0001] The invention relates to the technical field of winding machines, in particular to a hollow coil winding mechanism with a starting and tailing wire located outside the coil. Background Art

[0002] A coil usually refers to a ring-shaped wire winding. The most common coils are motors, inductors, transformers, and ring antennas. Among them, the wireless charging coil ends energy transmission through the intermittent energy coupling of the coil. The receiving coil receives the current emitted by the wireless charging transmitting coil. When the transmitting coil emits current, the receiving coil receives the emitted current to the current storage end. In the prior art, the winding of hollow coils is mostly to first pull the wire from the wire storage barrel and clamp it on the wire clamp, and then rotate the upper and lower molds to wind the wire around the shaft column. However, this causes the starting wire to be pressed to the inside of the wire by layers of coils, resulting in the final coil being formed with the starting wire located on the inside of the coil and the tail wire located on the outside of the coil. However, for some special devices, it is sometimes necessary for the starting wire and the tail wire of the coil to be located on the outside of the coil. Therefore, a hollow coil winding mechanism that can wind the starting and tail wires on the outside of the coil is required. Summary of the invention

[0003] In view of this, the present invention provides a hollow coil winding mechanism with a starting and tailing wire located outside the coil to solve the above technical problems.

[0004] A hollow coil winding mechanism with the starting and tail wires located outside the coil, comprising a frame, a male mold assembly arranged on the frame, a female mold assembly arranged on the frame, a flying fork assembly arranged on the female mold assembly, a wire pulling assembly located on one side of the frame, and a pre-stored wire assembly arranged on the frame. The male mold assembly comprises a first driving shaft movably arranged on the frame, a male mold plate arranged on the first driving shaft, a male mold movably arranged in the male mold plate, and a male mold moving shaft inserted in the first driving shaft and used to drive the male mold to move. One end of the male mold is connected to the male mold moving shaft, and the other end is in contact with the female mold assembly when the mold is closed, and the male mold moving shaft rotates with the first driving shaft. The female mold assembly comprises a second driving shaft movably arranged on the frame, a wire passing hole arranged on the second driving shaft, and a female mold plate rotatably arranged on the second driving shaft. One end of the wire hole passes through one end of the second drive shaft, and the other end is connected to the side wall of the second drive shaft. The wire passes through one end of the wire hole and then passes through the side wall of the second drive shaft and enters the flying fork assembly. The wire pulling assembly is used to clamp the wire passing through the flying fork assembly and move it toward the pre-storage wire assembly. The pre-storage wire assembly is used to clamp the starting wire and rotate it to store the wire when it is needed to store the wire or reverse it to pay out the wire when it is needed to pay out the wire. When winding the first layer of wire, the flying fork assembly does not rotate, and the male mold assembly and the female mold assembly rotate to use the wire in the wire storage wheel to wind the first circle of the first layer, then the male mold assembly and the female mold assembly stop rotating, and the flying fork assembly rotates and moves axially to wind the wire along the outer wall of the male mold, from the end of the male mold close to the female mold assembly toward the end close to the male mold assembly. When winding the second layer, the male mold assembly and the female mold assembly do not rotate, and the flying fork assembly rotates and moves axially to wind the wire along the outer wall of the first layer of coil, from the end of the male mold close to the male mold assembly toward the end close to the female mold assembly, until the winding stops with only the first circle left, and the last circle is wound through the pre-stored wire assembly, and the winding is repeated.

[0005] Furthermore, a bearing is provided between the female mold plate and the second driving shaft, and two latches are provided on the male mold, one end of the latches is inserted on the male mold, and the other end is inserted on the female mold plate when the mold is closed. When the male mold rotates, the female mold plate can be driven to rotate synchronously.

[0006] Furthermore, the flying fork assembly includes a flying fork cylinder arranged on the second driving shaft, a flying fork rod arranged on the flying fork cylinder, a guide needle arranged on the flying fork rod, and a plurality of wire-passing wheels arranged on the flying fork rod. The flying fork cylinder is provided with a through hole for threading, and the flying fork cylinder rotates with the second driving shaft. One end of the flying fork rod is connected to the flying fork cylinder, and the other end extends toward the punch and is provided with the guide needle. The wire is introduced from one end of the wire-passing hole and then out from the side wall of the second driving shaft and then enters the flying fork assembly. The wire passes through the through hole on the flying fork cylinder, passes through a plurality of wire-passing wheels in sequence, and finally passes through the guide needle.

[0007] Furthermore, the hollow coil winding mechanism with the starting and tail wires located outside the coil also includes a driving assembly arranged on the frame, and the driving assembly includes a first rotating mechanism arranged on the frame, a second rotating mechanism arranged on the frame, a first axial moving mechanism arranged on the frame, a second axial moving mechanism arranged on the frame, and a third axial moving mechanism arranged on the frame.

[0008] Further, the first rotating mechanism is used to drive the first driving shaft to rotate, and the rotation of the first driving shaft drives the punch and the punch moving shaft to rotate, thereby realizing the rotation of the punch assembly, the second rotating mechanism is used to drive the second driving shaft to rotate, and the rotation of the second driving shaft drives the flying fork assembly to rotate, thereby realizing the rotation of the die assembly and the flying fork assembly, the first axial moving mechanism is used to drive the first driving shaft to move axially, thereby controlling the punch assembly to approach or move away from the die assembly to realize the closing or parting of the punch assembly and the die assembly, the second axial moving mechanism is connected to the punch moving shaft, thereby being able to drive the punch moving shaft to move axially alone, thereby controlling the punch to extend or retract the punch template, and the third axial moving mechanism is connected to the flying fork assembly and is used to drive the flying fork assembly to move axially.

[0009] Furthermore, the wire pulling assembly includes a first linear moving device and a wire clamping cylinder arranged on the first linear moving device. When the wire passes through the guide needle and is clamped by the wire clamping cylinder, the first linear moving device drives the wire clamping cylinder to move, so that the wire clamping cylinder clamps the wire and moves toward the pre-stored wire assembly.

[0010] Furthermore, the pre-wire storage assembly includes a second linear motion device, a rotating device arranged on the second linear motion device, a wire storage wheel arranged on the rotating device, a wire clamp arranged on the wire storage wheel, a driving cylinder arranged on the second linear motion device, and a push plate arranged on the driving cylinder.

[0011] Furthermore, the second linear moving device is used to drive the pre-stored wire assembly to move axially along the first driving shaft, and the rotating device is used to drive the wire storage wheel to rotate.

[0012] Furthermore, the wire clamp includes a bracket arranged on the wire storage wheel, a lower clamping block movably arranged on the bracket, a movable rod arranged on the bracket, an upper clamping block arranged on the movable rod, and a spring sleeved on the movable rod. The bracket rotates together with the wire storage wheel, and the movable rod is movably passed through the bracket. One end of the movable rod is provided with an upper clamping block, and the other end is provided with a limiting portion with a diameter larger than that of the movable rod. One end of the spring abuts against the bracket, and the other end abuts against the limiting portion. The spring moves the upper clamping block toward the lower clamping block through its own elastic force.

[0013] Furthermore, the output direction of the driving cylinder is close to or away from the wire clamp, and the axial direction of the movable rod is the same as the output direction of the driving cylinder. The driving cylinder drives the push plate to move. When the wire clamp needs to be unlocked, the push plate pushes the movable rod to compress the spring and at the same time the movable rod drives the upper clamp block to move in a direction away from the lower clamp block, thereby separating the upper clamp block and the lower clamp block to loosen the wire.

[0014] Compared with the prior art, the hollow coil winding mechanism provided by the present invention, in which the starting and tail wires are located outside the coil, clamps the starting wire through the wire clamp on the pre-storage wire assembly, and then the rotating device is used to drive the wire storage wheel to rotate, so that the wire storage wheel rotates when the wire needs to be stored or reverses to pay out the wire when the wire needs to be paid out for winding, thereby pre-storing the starting wire. During winding, the starting wire part of each layer is wound one circle by the pre-storage wire assembly, and the remaining part is wound by the flying fork assembly, so that each layer is compensated by one circle of the starting wire by the wire storage wheel, which can ensure that the starting wire is always outside the coil, and the tail wire is normally wound on the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a hollow coil winding mechanism with a starting and tailing wire located outside the coil provided by the present invention.

[0016] Figure 2 for Figure 1 The schematic diagram of the structure of the hollow coil winding mechanism in which the starting and tail wires are located outside the coil removes the driving assembly, the wire pulling assembly, and the pre-stored wire assembly.

[0017] Figure 3 for Figure 2A cross-sectional view of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil, with the drive assembly, the wire pulling assembly, and the pre-stored wire assembly removed.

[0018] Figure 4 for Figure 1 A schematic structural diagram of a convex mold, a concave mold, and a convex mold of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil.

[0019] Figure 5 for Figure 1 A schematic structural diagram of a pre-stored wire assembly of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil.

[0020] Figure 6 for Figure 1 A schematic structural diagram of a wire clamp of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil.

[0021] Figure 7 for Figure 1 A cross-sectional view of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil when the first layer is wound.

[0022] Figure 8 for Figure 1 A cross-sectional view of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil when winding the last turn of the first layer.

[0023] Fig. 9 for Figure 1 A cross-sectional view of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil when winding the first turn of the second layer.

[0024] Fig.10 for Figure 1 A cross-sectional view of a hollow coil winding mechanism in which the starting and tail wires are located outside the coil when the second layer is wound.

[0025] Explanation of the accompanying drawings: frame 10, punch assembly 20, first drive shaft 21, punch plate 22, punch 23, latch 231, punch moving shaft 24, die assembly 30, second drive shaft 31, wire hole 32, die plate 33, flying fork assembly 40, flying fork cylinder 41, flying fork rod 42, guide needle 43, wire wheel 44, drive assembly 50, first rotating mechanism 51, second rotating mechanism 52, first axial moving mechanism 53, second axial moving mechanism 54, third axial moving mechanism 55, wire pulling assembly 60, first linear moving device 61, wire clamping cylinder 62, pre-wire storage assembly 70, second linear moving device 71, rotating device 72, wire storage wheel 73, wire clamp 74, bracket 741, lower clamping block 742, movable rod 743, upper clamping block 744, spring 745, limiting portion 746, drive cylinder 75, push plate 76. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0027] like Figures 1 to 10 As shown, it is a schematic diagram of the structure of the hollow coil winding mechanism with the starting and tail wire located outside the coil provided by the present invention. The hollow coil winding mechanism with the starting and tail wire located outside the coil includes a frame 10, a male mold assembly 20 arranged on the frame 10, a female mold assembly 30 arranged on the frame 10, a flying fork assembly 40 arranged on the female mold assembly 30, a driving assembly 50 arranged on the frame 10, a wire pulling assembly 60 located on one side of the frame 10, and a pre-stored wire assembly 70 arranged on the frame 10. It can be imagined that the hollow coil winding mechanism with the starting and tail wire located outside the coil also includes some other functional components, such as a driving device, a connecting assembly, etc., which are technologies well known to those skilled in the art and will not be repeated here.

[0028] The rack 10 is in a U-shaped structure and is used to carry the above-mentioned functional modules. Therefore, the rack 10 is provided with a variety of functional structures, such as screws, bolts, through holes, etc. to complete the installation and assembly of the above-mentioned functional modules. It can be arranged according to actual needs and will not be described in detail one by one here.

[0029] like Figure 2 and Figure 3 As shown, the punch assembly 20 includes a first driving shaft 21 movably disposed on the frame 10, a punch plate 22 disposed on the first driving shaft 21, a punch 23 movably disposed in the punch plate 22, and a punch moving shaft 24 inserted in the first driving shaft 21 and used for driving the punch 23 to move.

[0030] One end of the first driving shaft 21 is connected to the driving assembly 50 through a belt, and the other end is provided with the male mold plate 22. The first driving shaft 21 can rotate and move axially under the drive of the driving assembly 50, thereby driving the male mold plate 22 and the male mold 23 to rotate and move axially. How to perform the axial movement will be described in detail below.

[0031] The male mold 23 is used as the axis of the winding to form a hollow coil, so the wire will be wound on the outer wall of the male mold 23, and the male mold 23 is movably arranged at the center of the male mold plate 22. One end of the male mold 23 is connected to the male mold moving shaft 24, and the other end is fitted with the female mold assembly 30 when the mold is closed, so that the male mold plate 22 and the female mold assembly 30 are located on both sides of the male mold 23 to form a winding space. The male mold moving shaft 24 rotates with the first drive shaft 21, and can also move axially alone under the drive of the drive assembly 50, so as to control the male mold 23 to extend or retract the male mold plate 22, so that the coil on the male mold 23 can be retracted after the winding is completed. The rotation and axial movement of the first drive shaft 21 and the male mold moving shaft 24 will be explained below in conjunction with the drive assembly 50.

[0032] See also Figures 2 to 4 The die assembly 30 includes a second drive shaft 31 movably disposed on the frame 10 , a wire hole 32 disposed on the second drive shaft 31 , and a die plate 33 rotatably disposed on the second drive shaft 31 .

[0033] One end of the second drive shaft 31 is connected to the drive assembly 50 through a belt, and the other end is provided with the flying fork assembly 40 and the rotatable cavity plate 33. The second drive shaft 31 can rotate under the drive of the drive assembly 50, which will be described in detail below. The wire hole 32 is coaxially arranged with the second drive shaft 31, one end of the wire hole 32 passes through one end of the second drive shaft 31, and the other end is connected to the side wall of the second drive shaft 31. After the wire is pulled out from the external wire barrel, it passes through one end of the wire hole 32 and then passes through the side wall of the second drive shaft 31 and enters the flying fork assembly 40. A bearing is arranged between the cavity plate 33 and the second drive shaft 31. In order to ensure that the cavity plate 33 can rotate synchronously with the male mold assembly 20, two latches 231 are also arranged on the male mold 23, one end of the latch 231 is inserted into the male mold 23, and the other end is inserted into the cavity plate 33 when the mold is closed. When the mold is closed, the latch 231 connects the male mold 23 and the female mold plate 33, and the female mold plate 33 is rotatably arranged on the second drive shaft 31, so that when the male mold 23 rotates, the female mold plate 33 can be synchronously driven to rotate together. Therefore, the rotation of the flying fork assembly 40 is controlled and driven by the second drive shaft 31 alone, while the rotation of the female mold plate 33, the male mold 23, and the male mold plate 22 is controlled and driven by the first drive shaft 21. This control is to facilitate the compensation winding required later, and the specific description will be described in conjunction with the winding process below. The rotation of the second drive shaft 31 will be described in conjunction with the drive assembly 50 below.

[0034] like Figure 3 As shown, the flying fork assembly 40 includes a flying fork cylinder 41 arranged on the second driving shaft 31, a flying fork rod 42 arranged on the flying fork cylinder 41, a guide needle 43 arranged on the flying fork rod 42, and a plurality of line passing wheels 44 arranged on the flying fork rod 42.

[0035] The fly fork cylinder 41 is provided with a through hole for threading, and the fly fork cylinder 41 rotates with the second drive shaft 31. One end of the fly fork rod 42 is connected to the fly fork cylinder 41, and the other end extends toward the male mold 23 and is provided with the guide pin 43. The wire is introduced from one end of the wire hole 32, and then passed out from the side wall of the second drive shaft 31 and then enters the fly fork assembly 40. The wire passes through the through hole on the fly fork cylinder 41, passes through a plurality of wire wheels 44 in sequence, and finally passes through the guide pin 43.

[0036] like Figure 1 As shown, the driving assembly 50 includes a first rotating mechanism 51 arranged on the frame 10, a second rotating mechanism 52 arranged on the frame 10, a first axial moving mechanism 53 arranged on the frame 10, a second axial moving mechanism 54 arranged on the frame 10, and a third axial moving mechanism 55 arranged on the frame 10.

[0037] The first rotating mechanism 51 and the second rotating mechanism 52 are composed of a rotating motor, a belt, and a bearing, etc. The output shaft of the rotating motor is connected to the second drive shaft 31 or the first drive shaft 21 by the belt, so that when the output shaft of the rotating motor rotates, the second drive shaft 31 or the first drive shaft 21 can be driven to rotate. The first rotating mechanism 51 is used to drive the first drive shaft 21 to rotate, and the rotation of the first drive shaft 21 drives the male mold 23 and the male mold moving shaft 24 to rotate, thereby realizing the rotation of the male mold assembly 20. The second rotating mechanism 52 is used to drive the second drive shaft 31 to rotate, and the rotation of the second drive shaft 31 drives the flying fork assembly 40 to rotate, thereby realizing the rotation of the female mold assembly 30 and the flying fork assembly 40. The first axial moving mechanism 53 is composed of a screw moving device, a rotating motor, a bearing, a coupling, and a connecting plate, etc. The first axial moving mechanism 53 is used to drive the first drive shaft 21 to move axially, thereby controlling the male mold assembly 20 to approach or move away from the female mold assembly 30, so as to realize the closing or parting of the male mold assembly 20 and the female mold assembly 30. The second axial moving mechanism 54 is composed of a driving cylinder and a bearing, etc. The second axial moving mechanism 54 is connected to the punch moving shaft 24, so that the punch moving shaft 24 can be driven to move axially alone, thereby controlling the punch 23 to extend or retract the punch plate 22. The third axial moving mechanism 55 is composed of a screw moving device, a rotating motor, a bearing, a coupling, and a connecting rod. The third axial moving mechanism 55 is connected to the flying fork assembly 40 and is used to drive the flying fork assembly 40 to move axially, thereby controlling the flying fork assembly 40 to move axially during winding. The driving assembly 50 is similar to the patent name disclosed in the application number CN202321061739.4, which is a synchronous transmission mechanism in a hollow coil winding machine. Therefore, the driving assembly 50 should be a prior art and will not be repeated here.

[0038] like Figure 1 As shown, the wire pulling assembly 60 includes a first linear motion device 61 and a wire clamping cylinder 62 disposed on the first linear motion device 61. When the wire passes through the guide needle 43 and is clamped by the wire clamping cylinder 62, the first linear motion device 61 drives the wire clamping cylinder 62 to move, so that the wire clamping cylinder 62 moves toward the pre-stored wire assembly 70 while clamping the wire.

[0039] like Figure 5As shown, the pre-line storage assembly 70 includes a second linear motion device 71, a rotating device 72 arranged on the second linear motion device 71, a line storage wheel 73 arranged on the rotating device 72, a line clamp 74 arranged on the line storage wheel 73, a driving cylinder 75 arranged on the second linear motion device 71, and a push plate 76 arranged on the driving cylinder 75.

[0040] The second linear moving device 71 is used to drive the pre-stored wire assembly 70 to move linearly, so that the pre-stored wire assembly 70 can move along the axial direction of the first drive shaft 21 as needed during winding, ensuring that the wire can be wound at different positions of the male mold 23 as needed. The rotating device 72 is used to drive the wire storage wheel 73 to rotate, so that the wire storage wheel 73 rotates when the wire needs to be stored or reverses to release the wire when the wire needs to be released and wound. The second linear moving device 71 and the rotating device 72 are prior art and will not be described in detail here.

[0041] The wire clamp 74 includes a bracket 741 disposed on the wire storage wheel 73, a lower clamping block 742 movably disposed on the bracket 741, a movable rod 743 disposed on the bracket 741, an upper clamping block 744 disposed on the movable rod 743, and a spring 745 sleeved on the movable rod 743. The bracket 741 rotates together with the wire storage wheel 73. The movable rod 743 is movably inserted on the bracket 741. An upper clamping block 744 is disposed at one end of the movable rod 743, and a limiting portion 746 having a diameter larger than that of the movable rod 743 is disposed at the other end. One end of the spring 745 abuts against the bracket 741, and the other end abuts against the limiting portion 746. The upper clamping block 744 is moved toward the direction of the lower clamping block 742 by its own elastic force, so that the upper clamping block 744 and one end of the lower clamping block 742 are closed to clamp the wire.

[0042] The output direction of the driving cylinder 75 is close to or away from the wire clamp 74, and the axial direction of the movable rod 743 is the same as the output direction of the driving cylinder 75. The driving cylinder 75 drives the push plate 76 to move. When the wire clamp 74 needs to be unlocked, the push plate 76 pushes the movable rod 743 to compress the spring 745. At the same time, the movable rod 743 drives the upper clamp block 744 to move away from the lower clamp block 742, thereby separating the upper clamp block 744 and the lower clamp block 742 to loosen the wire.

[0043] Before winding the wire, the wire pulling assembly 60 first clamps the wire passing through the guide needle 43 and moves it toward the pre-wire storage assembly 70. After the wire clamp 74 clamps the wire, the wire pulling assembly 60 is reset, and then the rotating device 72 drives the wire storage wheel 73 to rotate to wind the wire around the wire storage wheel 73. When winding the wire, first the male mold assembly 20 and the female mold assembly 30 are closed, and the winding needs to be done layer by layer. When winding the first layer, the pre-wire storage assembly 70 is used to wind the starting wire. Specifically, the flying fork assembly 40 does not rotate, and the male mold assembly 20 and the female mold assembly 30 rotate to use the wire in the wire storage wheel 73 to wind the first circle of the first layer. At this time, the wire storage wheel 73 should also rotate synchronously to release the wire. Then the male mold assembly 20 and the female mold assembly 30 stop rotating, and the flying fork assembly 40 rotates and moves axially to wind the wire along the outer wall of the male mold 23, from one end of the male mold 23 close to the female mold assembly 30 toward one end close to the male mold assembly 20, and the first layer of winding is completed.

[0044] When winding the second layer, the punch assembly 20 and the die assembly 30 do not rotate, and the flying fork assembly 40 rotates and moves axially to wind the wire along the outer wall of the first layer of coil, and winds from the end of the punch 23 close to the punch assembly 20 toward the end close to the die assembly 30, until the winding stops at the last first turn, that is, at this time, the coil is still one wire diameter away from the end close to the punch assembly 20, and the last turn is wound by the pre-wire storage assembly 70. Specifically, the flying fork assembly 40 does not rotate, and the punch assembly 20 and the die assembly 30 rotate to use the wire in the wire storage wheel 73 to wind the last turn of the second layer. At this time, the wire storage wheel 73 should also rotate synchronously to release the wire, and the second layer winding is completed. The above-mentioned winding method of the first layer coil and the second layer coil is cycled in this way to complete the winding of the subsequent layers until the required number of layers is reached, and then the excess wire is cut short and electrically heated to melt the surface of the enameled wire, and it will stick together after cooling. The subsequent steps should be the existing technology and will not be repeated here. By pre-storing the starting wire in the wire storage wheel 73, each layer of the male mold assembly 20 and the female mold assembly 30 uses an external wire drum to only wind until the last first circle is left. The last circle of winding is compensated by the wire pre-stored in the wire storage wheel 73, so that the starting wire can always be on the outside of the coil, and the tail wire is normally wound on the outside.

[0045] Compared with the prior art, the hollow coil winding mechanism provided by the present invention, in which the starting and tail wires are located outside the coil, clamps the starting wire through the wire clamp 74 on the pre-storage wire assembly 70, and then the rotating device 72 is used to drive the wire storage wheel 73 to rotate, so that the wire storage wheel 73 rotates when the wire needs to be stored or reverses to release the wire when the wire needs to be released for winding, thereby pre-storing the starting wire. During winding, the starting wire part of each layer is wound one circle by the pre-storage wire assembly 70, and the remaining part is wound by the flying fork assembly 40, so that each layer is compensated by one circle of starting wire by the wire storage wheel 73, which can ensure that the starting wire is always outside the coil, and the tail wire is normally wound on the outside.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A hollow coil winding mechanism with the starting and tailing wires located outside the coil, characterized in that: The hollow coil winding mechanism with the starting and tail wires located outside the coil includes a frame, a male mold assembly arranged on the frame, a female mold assembly arranged on the frame, a flying fork assembly arranged on the female mold assembly, a wire pulling assembly located on one side of the frame, and a pre-stored wire assembly arranged on the frame, the male mold assembly includes a first driving shaft movably arranged on the frame, a male mold plate arranged on the first driving shaft, a male mold movably arranged in the male mold plate, and a male mold moving shaft inserted in the first driving shaft and used to drive the male mold to move, the male mold One end is connected to the male mold moving shaft, and the other end is fitted with the female mold assembly when the mold is closed. The male mold moving shaft rotates with the first driving shaft. The female mold assembly includes a second driving shaft movably arranged on the frame, a wire hole arranged on the second driving shaft, and a female mold plate rotatably arranged on the second driving shaft. One end of the wire hole passes through one end of the second driving shaft, and the other end is connected to the side wall of the second driving shaft. The wire passes through one end of the wire hole and then passes through the side wall of the second driving shaft and enters the flying fork assembly. The wire pulling assembly is used to clamp the wire passing through the flying fork assembly The pre-storage wire assembly is used to hold and move toward the pre-storage wire assembly, the pre-storage wire assembly includes a second linear moving device, a rotating device arranged on the second linear moving device, a wire storage wheel arranged on the rotating device, a wire clamp arranged on the wire storage wheel, a driving cylinder arranged on the second linear moving device, and a push plate arranged on the driving cylinder. The pre-storage wire assembly is used to clamp the starting wire and rotate to store the wire when it is needed to store the wire or reverse to release the wire when it is needed to release the wire. When winding the first layer of wire, the flying fork assembly does not rotate, and the male mold assembly and the female mold assembly rotate to use the wire in the wire storage wheel to wind the wire. The first circle of the first layer of coils is made, and then the male mold assembly and the female mold assembly stop rotating, and the flying fork assembly rotates and moves axially to wind the wire along the outer wall of the male mold, from one end of the male mold close to the female mold assembly toward one end close to the male mold assembly. When winding the second layer, the male mold assembly and the female mold assembly do not rotate, and the flying fork assembly rotates and moves axially to wind the wire along the outer wall of the first layer of coils, from one end of the male mold close to the male mold assembly toward one end close to the female mold assembly, until the winding stops with the last circle left, and the last circle is wound through the pre-stored wire assembly, and the winding is repeated.

2. The hollow coil winding mechanism with the starting and tailing wires located outside the coil as claimed in claim 1, characterized in that: A bearing is arranged between the female mold plate and the second driving shaft, and two pins are also arranged on the male mold. One end of the pin is inserted into the male mold, and the other end is inserted into the female mold plate when the mold is closed. When the male mold rotates, it can synchronously drive the female mold plate to rotate together.

3. The hollow coil winding mechanism with the starting and tailing wires located outside the coil as claimed in claim 1, characterized in that: The flying fork assembly includes a flying fork cylinder arranged on the second driving shaft, a flying fork rod arranged on the flying fork cylinder, a guide needle arranged on the flying fork rod, and a plurality of wire-passing wheels arranged on the flying fork rod. The flying fork cylinder is provided with a through hole for threading, and the flying fork cylinder rotates with the second driving shaft. One end of the flying fork rod is connected to the flying fork cylinder, and the other end extends toward the punch and is provided with the guide needle. The wire is introduced from one end of the wire-passing hole and then out from the side wall of the second driving shaft and then enters the flying fork assembly. The wire passes through the through hole on the flying fork cylinder, passes through a plurality of wire-passing wheels in sequence, and finally passes through the guide needle.

4. The hollow coil winding mechanism with the starting and tailing wires located outside the coil as claimed in claim 1, characterized in that: The hollow coil winding mechanism with the starting and tail wires located outside the coil also includes a driving assembly arranged on the frame, and the driving assembly includes a first rotating mechanism arranged on the frame, a second rotating mechanism arranged on the frame, a first axial moving mechanism arranged on the frame, a second axial moving mechanism arranged on the frame, and a third axial moving mechanism arranged on the frame.

5. The hollow coil winding mechanism with the starting and tailing wires located outside the coil as claimed in claim 4, characterized in that: The first rotating mechanism is used to drive the first driving shaft to rotate, and the rotation of the first driving shaft drives the punch and the punch moving shaft to rotate, thereby realizing the rotation of the punch assembly. The second rotating mechanism is used to drive the second driving shaft to rotate, and the rotation of the second driving shaft drives the flying fork assembly to rotate, thereby realizing the rotation of the die assembly and the flying fork assembly. The first axial moving mechanism is used to drive the first driving shaft to move axially, thereby controlling the punch assembly to approach or move away from the die assembly to realize the closing or parting of the punch assembly and the die assembly. The second axial moving mechanism is connected to the punch moving shaft, thereby being able to drive the punch moving shaft to move axially alone, thereby controlling the punch to extend or retract the punch template. The third axial moving mechanism is connected to the flying fork assembly and is used to drive the flying fork assembly to move axially.

6. The hollow coil winding mechanism with the starting and tailing wires located outside the coil as claimed in claim 3, characterized in that: The wire pulling assembly includes a first linear moving device and a wire clamping cylinder arranged on the first linear moving device. When the wire passes through the guide needle and is clamped by the wire clamping cylinder, the first linear moving device drives the wire clamping cylinder to move, so that the wire clamping cylinder clamps the wire and moves toward the pre-stored wire assembly.

7. The hollow coil winding mechanism with the starting and tail wires located outside the coil as claimed in claim 1, characterized in that: The second linear moving device is used to drive the pre-stored wire assembly to move axially along the first driving shaft, and the rotating device is used to drive the wire storage wheel to rotate.

8. The hollow coil winding mechanism with the starting and tailing wires located outside the coil as claimed in claim 1, characterized in that: The wire clamp includes a bracket arranged on the wire storage wheel, a lower clamping block movably arranged on the bracket, a movable rod arranged on the bracket, an upper clamping block arranged on the movable rod, and a spring sleeved on the movable rod. The bracket rotates together with the wire storage wheel, and the movable rod is movably passed through the bracket. One end of the movable rod is provided with an upper clamping block, and the other end is provided with a limiting portion with a diameter larger than that of the movable rod. One end of the spring abuts against the bracket, and the other end abuts against the limiting portion. The spring moves the upper clamping block toward the lower clamping block through its own elastic force.

9. The hollow coil winding mechanism with the starting and tailing wires located outside the coil as claimed in claim 8, characterized in that: The output direction of the driving cylinder is close to or away from the wire clamp, and the axial direction of the movable rod is the same as the output direction of the driving cylinder. The driving cylinder drives the push plate to move. When the wire clamp needs to be unlocked, the push plate pushes the movable rod to compress the spring and at the same time the movable rod drives the upper clamp block to move in a direction away from the lower clamp block, thereby separating the upper clamp block and the lower clamp block to loosen the wire.

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