Automatic wire threading device and medium-speed wire cutting machine tool

Abstract

The invention discloses an automatic wire threading device and a medium-speed wire cutting machine tool. The automatic wire threading device comprises a base body, the base body is provided with a first wire threading channel, a second wire threading channel, a mounting hole and a third wire threading channel, the first wire threading channel is located above the second wire threading channel, and the third wire threading channel is located below the second wire threading channel; the mounting hole is located between the second wire penetrating channel and the third wire penetrating channel and communicates with the second wire penetrating channel and the third wire penetrating channel. The two transmission wheels are located between the first wire penetrating channel and the second wire penetrating channel; the first driving mechanism is in transmission connection with at least one of the two transmission wheels; the second driving mechanism is in transmission connection with at least one of the two transmission wheels; and the third driving mechanism is provided with a guide wheel, the guide wheel is rotatably arranged in the mounting hole, and the guide wheel and the inner circumferential surface of the mounting hole are arranged to jointly guide the silk thread penetrating to the mounting hole from the second silk penetrating channel to be conveyed to the third silk penetrating channel. The automatic silk threading device is short in silk threading time and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the field of mechanical equipment, and more specifically, to an automatic wire threading device and a medium-wire cutting machine tool. Background Art

[0002] Existing medium-speed wire cutting machines all use manual threading to thread the wires, but manual threading is time-consuming and inefficient, which seriously affects the production efficiency of the medium-speed wire cutting machines. Summary of the invention

[0003] The embodiment of the present invention provides an automatic wire threading device, which takes less time and has higher efficiency in threading a wire.

[0004] The embodiment of the present invention also provides a medium-speed wire cutting machine tool.

[0005] The embodiment of the present invention provides an automatic wire threading device, comprising: a base body, provided with a first wire threading channel, a second wire threading channel, a mounting hole and a third wire threading channel, wherein the first wire threading channel is located above the second wire threading channel, the third wire threading channel is located below the second wire threading channel, the mounting hole is located between the second wire threading channel and the third wire threading channel, and is connected to both the second wire threading channel and the third wire threading channel; two transmission wheels, located between the first wire threading channel and the second wire threading channel; a first drive mechanism, which is transmission-connected to at least one of the two transmission wheels, and is configured to be in rotation between the two transmission wheels. When the transmission wheels are pressed against each other, the two transmission wheels are driven to rotate, so that the silk thread passed through the first wire threading channel and extended between the two transmission wheels is transported to the second wire threading channel through the two transmission wheels; a second driving mechanism is transmission-connected to at least one of the two transmission wheels, and is configured to drive the two transmission wheels to be pressed against and separated from each other; and a third driving mechanism is provided with a guide wheel, the guide wheel is rotatably arranged in the mounting hole, and the guide wheel and the inner circumferential surface of the mounting hole are configured to jointly guide the silk thread passed through the second wire threading channel to the mounting hole to be transported to the third wire threading channel.

[0006] In some exemplary embodiments, the second driving mechanism includes: a second transmission structure, which is provided on the base and is transmission-connected to the two transmission wheels; and a second driving structure, which is transmission-connected to the second transmission structure and is configured to drive the second transmission structure to move the two transmission wheels toward each other to abut against each other and move away from each other to separate.

[0007] In some exemplary embodiments, the second transmission structure includes: two second rotating shafts, both of which are arranged on the base; two first swing arms, whose first ends are respectively arranged on the two second rotating shafts, and whose second ends are respectively connected to the two transmission wheels for transmission, and the two first swing arms are configured to swing synchronously towards each other around the two second rotating shafts so that the two transmission wheels are pressed against each other, and to swing synchronously away from each other around the two second rotating shafts so that the two transmission wheels are separated.

[0008] In some exemplary embodiments, meshing teeth are provided at the second rotating shafts on opposite sides of the two first swing arms, and the two first swing arms achieve synchronous swinging toward each other and synchronous swinging away from each other through the meshing teeth.

[0009] In some exemplary embodiments, the second driving structure includes: a telescopic cylinder, whose cylinder barrel is fixedly connected to the second end of one of the two first swing arms; a connecting member, one end of which is fixedly connected to the second end of the other of the two first swing arms and the other end is hinged to the piston rod of the telescopic cylinder.

[0010] In some exemplary embodiments, the first driving mechanism includes: a first driving motor, which is fixed to one of the two first swing arms and is drivingly connected to the transmission wheel corresponding to the one of the two first swing arms.

[0011] In some exemplary embodiments, the first driving mechanism further includes: two transmission gears, respectively fixed to the two transmission wheels, and the two transmission wheels are meshed and driven by the two transmission gears to rotate synchronously.

[0012] In some exemplary embodiments, the base is provided with two functional holes whose side walls intersect, the first wire threading channel is located above the two functional holes, the lower end of the first wire threading channel is connected to the intersection of the two functional holes, the second wire threading channel is located below the two functional holes, the upper end of the second wire threading channel is connected to the intersection of the two functional holes, and the two transmission wheels are respectively arranged in the two functional holes and can move toward each other to press and move away from each other to separate in the two functional holes.

[0013] In some exemplary embodiments, the axis of the second wire threading channel and the axis of the third wire threading channel are both tangent to the guide wheel, and the angle between the axis of the second wire threading channel and the axis of the third wire threading channel is 80 degrees to 100 degrees.

[0014] In some exemplary embodiments, the automatic wire threading device also includes: a mounting arm provided with a wire guide channel, connected to the base, the wire guide channel is connected to the third wire threading channel, the wire thread transported through the third wire threading channel is threaded into the wire guide channel and continues to be transported along the wire guide channel.

[0015] In some exemplary embodiments, the automatic wire threading device further comprises: a wire guide tube, which is arranged on the mounting arm, and the inner hole of the wire guide tube forms the wire guide channel.

[0016] An embodiment of the present invention further provides a medium-speed wire cutting machine tool, comprising the automatic wire threading device described in any of the above embodiments.

[0017] The technical solution provided by the embodiment of the present invention is that when it is necessary to thread the silk thread, the second driving mechanism drives the two transmission wheels to be pressed against each other, the first driving mechanism drives the two transmission wheels to rotate, and the third driving mechanism drives the guide wheel to rotate. The silk thread is threaded in the first threading channel, and the free end extends between the two transmission wheels. In this way, the two rotating transmission wheels will downwardly pass the free end of the silk thread into the second threading channel in a downward conveying manner, and continue to convey the silk thread downward along the second threading channel. When the free end of the silk thread extends into the mounting hole and is threaded to the guide wheel, the rotating guide wheel and the inner circumference of the mounting hole jointly guide the free end of the silk thread to pass into the third threading channel, and the silk thread will continue to be conveyed along the third threading channel; this solution takes a short time to thread the silk thread and has high efficiency. After the threading of the silk thread is completed, the first driving mechanism drives the two transmission wheels to stop rotating, the second driving mechanism drives the two transmission wheels to separate, and the third driving mechanism drives the guide wheel to stop, so that the silk thread is no longer pressed by the two transmission wheels and can perform subsequent actions normally.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0020] Figure 1 and Figure 2 A schematic diagram of the three-dimensional structure of an automatic wire threading device provided in some embodiments of the present invention;

[0021] Figure 3 for Figure 1 The schematic diagram of the exploded structure of the automatic wire threading device shown;

[0022] Figure 4 and Figure 5 for Figure 3 Schematic diagram of the exploded structure of the middle base, the third driving mechanism and the docking channel component;

[0023] Figure 6 for Figure 3 A schematic diagram of the exploded structure of the first driving mechanism and the second driving mechanism;

[0024] Figure 7 for Figure 1 The main structural cross-sectional schematic diagram of the automatic wire threading device shown.

[0025] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0026] 100 base, 110 first wire threading channel, 120 second wire threading channel, 130 axial hole, 140 functional hole, 150 lower wire guide nozzle, 160 mounting hole, 170 third wire threading channel, 200 transmission wheel, 300 first driving mechanism, 310 first driving motor, 320 transmission gear, 330 first rotating shaft, 400 second driving mechanism, 410 second transmission structure, 411 second rotating shaft, 412 first swing arm, 413 semicircular gear, 420 second driving structure, 421 telescopic cylinder, 422 mounting frame, 423 connecting piece, 424 connecting rod, 510 guide wheel, 520 third driving mechanism, 610 mounting arm, 620 wire guide tube, 700 docking channel component. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0028] The embodiment of the present invention provides an automatic wire threading device, such as Figures 1 to 7As shown, it includes: a base body 100, the base body 100 is provided with a first wire threading channel 110, a second wire threading channel 120, a mounting hole 160 and a third wire threading channel 170, the first wire threading channel 110 is located above the second wire threading channel 120, the third wire threading channel 170 is located below the second wire threading channel 120, the mounting hole 160 is located between the second wire threading channel 120 and the third wire threading channel 170, and is connected to the second wire threading channel 120 and the third wire threading channel 170; two transmission wheels 200, the two transmission wheels 200 are located between the first wire threading channel 110 and the second wire threading channel 120; a first driving mechanism 300, the first driving mechanism 300 is transmission-connected to at least one of the two transmission wheels 200, and is arranged to be When the two transmission wheels 200 are pressed against each other, the two transmission wheels 200 are driven to rotate, so that the silk thread passing through the first wire threading channel 110 and extending between the two transmission wheels 200 is transported to the second wire threading channel 120 through the two transmission wheels 200; the second driving mechanism 400, the second driving mechanism 400 is transmission-connected to at least one of the two transmission wheels 200, and is configured to drive the two transmission wheels 200 to be pressed against and separated from each other; and a third driving mechanism 520 provided with a guide wheel 510, the guide wheel 510 is rotatably disposed in the mounting hole 160, and the rotating guide wheel 510 and the inner circumferential surface of the mounting hole 160 are configured to jointly guide the silk thread passing through the second wire threading channel 120 to the guide wheel 510 to be transported to the third wire threading channel 170.

[0029] like Figure 7 As shown, when it is necessary to thread the silk thread, the second driving mechanism 400 drives the two transmission wheels 200 to press against each other, the first driving mechanism 300 drives the two transmission wheels 200 to rotate, and the third driving mechanism 520 drives the guide wheel 510 to rotate. The silk thread is threaded in the first threading channel 110, and the free end extends between the two transmission wheels 200. In this way, the two rotating transmission wheels 200 will downwardly convey the free end of the silk thread into the second threading channel 120 in a downward conveying manner, and continue to convey the silk thread downward along the second threading channel 120. When the free end of the silk thread extends into the mounting hole 160 and is threaded to the guide wheel 510, the rotating guide wheel 510 and the inner circumference of the mounting hole 160 jointly guide the free end of the silk thread to penetrate into the third threading channel 170, and the silk thread will continue to be conveyed along the third threading channel 170. This scheme takes short time and has high efficiency in threading the silk thread. After the threading of the silk thread is completed, the first driving mechanism 300 drives the two transmission wheels 200 to stop rotating, the second driving mechanism 400 drives the two transmission wheels 200 to separate, and the third driving mechanism 520 drives the guide wheel 510 to stop. In this way, the silk thread is no longer pressed by the two transmission wheels 200, and subsequent actions can be performed normally.

[0030] In some examples, such as Figure 3 and Figure 6As shown, the second driving mechanism 400 includes: a second transmission structure 410, which is arranged on the base 100 and is transmission-connected to the two transmission wheels 200; and a second driving structure 420, which is transmission-connected to the second transmission structure 410, and the second driving structure 420 is configured to drive the second transmission structure 410 to move the two transmission wheels 200 toward each other to press against each other and move away from each other to separate.

[0031] In some embodiments, Figure 3 and Figure 6 As shown, the second transmission structure 410 includes: two second rotating shafts 411, two shaft holes 130 are provided on the base 100, and the two second rotating shafts 411 are rotatably installed in the two shaft holes 130 through two bearings; two first swing arms 412, the first ends of the two first swing arms 412 are respectively fixed to the two second rotating shafts 411, and the second ends of the two first swing arms 412 are respectively connected to the two transmission wheels 200 for transmission, and the second driving structure 420 is configured to drive the two first swing arms 412 to swing synchronously towards each other and synchronously away from each other around the axes of the two second rotating shafts 411, and the two first swing arms 412 are configured to swing synchronously towards each other around the axes of the two second rotating shafts 411 so that the two transmission wheels 200 are pressed against each other, and to swing synchronously away from each other around the axes of the two second rotating shafts 411 so that the two transmission wheels 200 are separated.

[0032] Furthermore, if Figure 3 and Figure 6 As shown, meshing teeth are provided at the second rotating shaft 411 on the opposite side of the two first swing arms 412, and the two first swing arms 412 achieve synchronous swinging toward each other and synchronous swinging away from each other through the meshing teeth. Alternatively, the second transmission structure 410 further includes two semicircular gears 413, which are fixedly connected to the two first swing arms 412 and clamped and fixed on the two second rotating shafts 411. The two semicircular gears 413 are located on the inner sides of the two first swing arms 412 and mesh with each other, and the meshing teeth are the gear teeth of the two semicircular gears 413.

[0033] In some examples, such as Figure 3 and Figure 6As shown, the second driving structure 420 includes: a telescopic cylinder 421 (such as a cylinder), the cylinder barrel of the telescopic cylinder 421 is fixedly connected to the second end of one of the two first swing arms 412 through a mounting frame 422; a connecting member 423, one end of the connecting member 423 is fixedly connected to the second end of the other of the two first swing arms 412, and the piston rod of the telescopic cylinder 421 is hinged to the other end of the connecting member 423 (the connecting member 423 is such as a folding plate) through a connecting rod 424. When the piston rod of the telescopic cylinder 421 is retracted, the telescopic cylinder 421 and the connecting member 423 will pull the second ends of the two first swing arms 412 to swing synchronously toward each other, so that the two transmission wheels 200 move toward each other and press against each other; when the piston rod of the telescopic cylinder 421 is extended, the telescopic cylinder 421 and the connecting member 423 will push the second ends of the two first swing arms 412 to swing synchronously in opposite directions, so that the two transmission wheels 200 move in opposite directions and separate from each other.

[0034] In some examples, such as Figure 2 , Figure 3 and Figure 6 As shown, the first driving mechanism 300 includes: a first driving motor 310, which is fixed to one of the two first swing arms 412 and is transmission-connected to a transmission wheel 200 corresponding to one of the two first swing arms 412, and the first driving motor 310 is configured to drive the transmission wheel 200 transmission-connected thereto to rotate.

[0035] In some examples, such as Figure 3 and Figure 6 As shown, the first driving mechanism 300 further includes: two transmission gears 320 , the two transmission gears 320 are respectively fixed to the two transmission wheels 200 , and the two transmission wheels 200 are meshed and driven by the two transmission gears 320 to rotate synchronously.

[0036] That is, the output shaft of the first driving motor 310 is located at the second end of one of the two first swing arms 412, a transmission gear 320 and a transmission wheel 200 are both fixedly mounted on the output shaft of the first driving motor 310, the other transmission gear 320 and the other transmission wheel 200 are both fixedly mounted on the first rotating shaft 330, and the two ends of the first rotating shaft 330 are rotatably mounted on the second end of the other of the two first swing arms 412 and the connecting member 423 (such as a folding plate). When the two transmission gears 320 are meshed and transmitted, the two transmission wheels 200 rotate synchronously, which can ensure that the silk thread can smoothly pass into the second threading channel 120.

[0037] In some examples, such as Figures 1 to 7As shown, the base body 100 is provided with two functional holes 140 whose side walls intersect, and the two functional holes 140 (which can be set as two arc holes) are arranged in sequence in the horizontal direction. The first wire threading channel 110 is located above the two functional holes 140, and the lower end of the first wire threading channel 110 is connected to the upper part of the intersection of the two functional holes 140. The second wire threading channel 120 is located below the two functional holes 140, and the upper end of the second wire threading channel 120 is connected to the lower part of the intersection of the two functional holes 140. The lower end of the first wire threading channel 110 is directly opposite to the upper end of the second wire threading channel 120 in the up and down directions. The two transmission wheels 200 are respectively arranged in the two functional holes 140, and can move toward each other in the two functional holes 140 to press and move away from each other to separate.

[0038] In some embodiments, Figures 1 to 5 , Figure 7 As shown, a lower wire guide nozzle 150 is provided at the upper end of the first wire threading channel 110, the base body 100 is arranged as a vertical substrate, the first drive motor 310, two first swing arms 412, two semicircular gears 413 and two transmission gears 320 are located on the first side of the substrate, the third drive mechanism 520, the telescopic cylinder 421 and the connecting member 423 are located on the second side of the substrate, the third drive mechanism 520 includes a third drive motor and a mounting sleeve, and the third drive motor is installed in the mounting sleeve.

[0039] In some embodiments, Figure 7 As shown, the axis of the second threading channel 120 and the axis of the third threading channel 170 are tangent to the guide wheel 510, and the axis of the second threading channel 120 intersects with the axis of the third threading channel 170 at an angle of 80 to 100 degrees. Figure 7 As shown, the angle between the axis of the second wire threading channel 120 and the axis of the third wire threading channel 170 is set to 90 degrees, the first wire threading channel 110 and the second wire threading channel 120 are arranged in the vertical direction, and the third wire threading channel 170 is arranged in the horizontal direction.

[0040] In some examples, such as Figures 1 to 3 , Figure 7 As shown, the automatic wire threading device also includes: a mounting arm 610 provided with a wire guide channel, the mounting arm 610 is connected to the base 100, the inlet of the wire guide channel is connected to the outlet of the third wire threading channel 170, and the wire conveyed through the third wire threading channel 170 is threaded into the wire guide channel and continues to be conveyed along the wire guide channel.

[0041] In some embodiments, Figure 2 and Figure 7Shown, the automatic threading device also includes: a horizontally arranged wire guide tube 620, which is arranged in the mounting arm 610, and the inner hole of the wire guide tube 620 forms a wire guide channel. It can be that the wire guide tube 620 includes at least one of a metal tube and a ceramic tube. The wire guide tube 620 is communicated with the third wire threading channel 170 through a docking channel component 700.

[0042] The process of threading the silk thread by the automatic threading device is as follows:

[0043] like Figure 7 As shown, the piston rod of the telescopic cylinder 421 contracts, so that the second ends of the two first swing arms 412 swing synchronously toward each other around the axes of the two second rotating shafts 411, and the two first swing arms 412 drive the two transmission wheels 200 to move synchronously toward each other and press against each other, and the two first swing arms 412 also drive the two transmission gears 320 to mesh, and the first drive motor 310 drives the two transmission gears 320 to rotate synchronously, thereby ensuring that the two transmission wheels 200 rotate synchronously, and the third drive motor drives the guide wheel 510 to rotate;

[0044] The wire is passed through the first wire threading channel 110 from the lower wire guide nozzle 150, and the free end extends between the two transmission wheels 200. The two rotating transmission wheels 200 will convey the free end of the wire downward into the second wire threading channel 120, and continue to convey the wire downward along the second wire threading channel 120. When the free end of the wire extends into the mounting hole 160 and is passed through the guide wheel 510, the rotating guide wheel and the inner circumference of the mounting hole 160 jointly guide the free end of the wire to pass through the third wire threading channel 170. The wire will continue to be conveyed along the third wire threading channel 170, and then the free end of the wire will pass through the wire guide tube 620 and pass out from the outlet of the wire guide tube 620 after passing through the wire guide tube 620.

[0045] After the thread threading action is completed: the piston rod of the telescopic cylinder 421 extends, driving the second ends of the two first swing arms 412 to swing synchronously in opposite directions around the axes of the two second rotating shafts 411, and the two first swing arms 412 drive the two transmission wheels 200 to move synchronously in opposite directions and separate from each other. The two first swing arms 412 also drive the two transmission gears 320 to separate, and control the first drive motor 310 and the third drive motor to stop.

[0046] An embodiment of the present invention further provides a medium-speed wire cutting machine (not shown in the figure), comprising the automatic wire threading device described in any of the above embodiments.

[0047] The medium-speed wire cutting machine has all the advantages of the automatic wire threading device proposed in any of the above embodiments, which will not be described in detail here.

[0048] In summary, the technical solution provided by the embodiment of the present invention is that when it is necessary to thread the silk thread, the second driving mechanism drives the two transmission wheels to be pressed against each other, the first driving mechanism drives the two transmission wheels to rotate, and the third driving mechanism drives the guide wheel to rotate. The silk thread is threaded in the first threading channel, and the free end extends between the two transmission wheels. In this way, the two rotating transmission wheels will downwardly pass the free end of the silk thread into the second threading channel in a downward conveying manner, and continue to convey the silk thread downward along the second threading channel. When the free end of the silk thread extends into the mounting hole and is threaded to the guide wheel, the rotating guide wheel and the inner circumference of the mounting hole jointly guide the free end of the silk thread to pass into the third threading channel, and the silk thread will continue to be conveyed along the third threading channel; this solution takes a short time to thread the silk thread and has high efficiency. After the threading of the silk thread is completed, the first driving mechanism drives the two transmission wheels to stop rotating, the second driving mechanism drives the two transmission wheels to separate, and the third driving mechanism drives the guide wheel to stop. In this way, the silk thread is no longer pressed by the two transmission wheels, and subsequent actions can be performed normally.

[0049] In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", "'mouth'-shaped structure" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred structure has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, or an indirect connection through an intermediate medium, or the internal connection 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.

[0051] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be defined by the attached claims.

Claims

1. An automatic wire threading device, characterized in that: include: A base body, provided with a first wire threading channel, a second wire threading channel, a mounting hole and a third wire threading channel, wherein the first wire threading channel is located above the second wire threading channel, the third wire threading channel is located below the second wire threading channel, and the mounting hole is located between the second wire threading channel and the third wire threading channel and is connected to both the second wire threading channel and the third wire threading channel; Two transmission wheels, located between the first wire threading channel and the second wire threading channel; A first driving mechanism is connected to at least one of the two transmission wheels in a transmission manner and is configured to drive the two transmission wheels to rotate when the two transmission wheels are pressed against each other, so that the wire threaded through the first threading channel and extending between the two transmission wheels is transported to the second threading channel through the two transmission wheels; A second driving mechanism is drivingly connected to at least one of the two transmission wheels and is configured to drive the two transmission wheels to abut against each other and separate from each other; and A third driving mechanism is provided with a guide wheel, the guide wheel is rotatably arranged in the mounting hole, and the guide wheel and the inner circumference of the mounting hole are configured to jointly guide the wire thread passed from the second wire threading channel to the mounting hole to be transported to the third wire threading channel.

2. The automatic wire threading device according to claim 1, characterized in that: The second driving mechanism comprises: A second transmission structure, disposed on the base and drivingly connected to the two transmission wheels; and The second driving structure is in transmission connection with the second transmission structure and is configured to drive the second transmission structure to move the two transmission wheels toward each other to abut against each other and move away from each other to separate.

3. The automatic wire threading device according to claim 2, characterized in that: The second transmission structure comprises: Two second rotation axes, both disposed on the base body; Two first swing arms, whose first ends are respectively arranged on the two second rotating shafts, and whose second ends are respectively connected to the two transmission wheels for transmission. The two first swing arms are arranged to swing synchronously towards each other around the two second rotating shafts so that the two transmission wheels are pressed against each other, and to swing synchronously away from each other around the two second rotating shafts so that the two transmission wheels are separated.

4. The automatic wire threading device according to claim 3, characterized in that: Meshing teeth are provided at the second rotating shafts on opposite sides of the two first swing arms, and the two first swing arms achieve synchronous swinging towards each other and synchronous swinging away from each other through the meshing teeth.

5. The automatic wire threading device according to claim 3, characterized in that: The second driving structure comprises: A telescopic cylinder, the cylinder barrel of which is fixedly connected to the second end of one of the two first swing arms; A connecting member, one end of which is fixedly connected to the second end of the other one of the two first swing arms, and the other end of which is hinged to the piston rod of the telescopic cylinder.

6. The automatic wire threading device according to claim 3, characterized in that: The first driving mechanism comprises: The first driving motor is fixedly mounted on one of the two first swing arms and is drivingly connected to the transmission wheel corresponding to the one of the two first swing arms.

7. The automatic wire threading device according to claim 6, characterized in that: The first driving mechanism further comprises: The two transmission gears are respectively fixedly connected to the two transmission wheels, and the two transmission wheels are meshed and driven by the two transmission gears to rotate synchronously.

8. The automatic wire threading device according to claim 1, characterized in that: The base body is provided with two functional holes whose side walls intersect, the first wire threading channel is located above the two functional holes, the lower end of the first wire threading channel is connected to the intersection of the two functional holes, the second wire threading channel is located below the two functional holes, the upper end of the second wire threading channel is connected to the intersection of the two functional holes, the two transmission wheels are respectively arranged in the two functional holes, and can move towards each other to press and move away from each other to separate in the two functional holes.

9. The automatic wire threading device according to claim 1, characterized in that: The axis of the second wire threading channel and the axis of the third wire threading channel are both tangent to the guide wheel, and the angle between the axis of the second wire threading channel and the axis of the third wire threading channel is 80 degrees to 100 degrees.

10. The automatic wire threading device according to any one of claims 1 to 9, characterized in that: Also includes: A mounting arm is provided with a wire guide channel, which is connected to the base body; the wire guide channel is connected to the third wire threading channel; the wire conveyed through the third wire threading channel is passed through the wire guide channel and is continuously conveyed along the wire guide channel.

11. The automatic wire threading device according to claim 10, characterized in that: Also includes: A wire guide tube is arranged on the mounting arm, and the inner hole of the wire guide tube forms the wire guide channel.

12. A medium-speed wire cutting machine tool, characterized in that: It comprises the automatic wire threading device as claimed in any one of claims 1 to 11.

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