Fully automatic winding apparatus for micro-transformers

Abstract

The present application relates to transformer winding technical field, disclose a full-automatic winding equipment for micro transformer, including rotating shaft, the one side of rotating shaft is provided with pay-off roller, the one side of pay-off roller is provided with first distance sensor, the one side of rotating shaft is also provided with line pressing cylinder, the both ends of line pressing cylinder are provided with support rod, line pressing cylinder is rotatably connected with support rod, a plurality of movable holes are set up on line pressing cylinder, a plurality of movable holes are divided into two groups, a group of movable holes is arranged in positive helical shape, another group of movable holes is arranged in reverse helical shape, movable blocks are movably arranged in movable holes, control mechanism for controlling the alternate extension of movable blocks in two groups of movable holes is arranged in line pressing cylinder, the present application is switched through two different direction helical convex structures, and the wire winding in different directions is adapted, and the wire is wound more compactly on the iron core.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer winding, in particular to a full-automatic winding equipment for micro transformer. BACKGROUND

[0002] A transformer is a device that transforms AC voltage, current, and impedance, and is widely used in power systems, electronic devices, and other fields. The main components of a transformer include a core, a coil, and an insulating material. The coil has two or more windings, of which the winding connected to the power source is called the primary coil, and the remaining windings are called the secondary coil. The basic working principle of a transformer is that when an AC current passes through the primary coil, an AC magnetic flux is generated in the core (or magnetic core), which induces a voltage (or current) in the secondary coil.

[0003] The winding is a key component of a transformer, and its performance directly affects the efficiency, loss, and reliability of the transformer. A transformer winding machine is a special device used to wind transformer coils. It can wind wires on the core according to specific turns and shapes, and through precise control, it can achieve efficient winding, ensure the quality and performance of the coil, and plays a key role in transformer production, improving production efficiency and product quality. When winding wires on the core, the core generates centrifugal force due to continuous rotation, and the winding tension of the wires fluctuates, which can cause the wires to loosen to some extent, the fit between the wires and the core to deteriorate, and the distance between the wires to be not compact enough, directly affecting the performance of the transformer.

[0004] In the prior art, in order to solve the problem of easy loosening of the wires after winding, the method of increasing the tension of the wires is usually used to ensure that the wires are wound tightly. However, since the wire diameter used in micro transformers is very small, increasing the tension of the wires will thin the wires and reduce the wire diameter, thereby affecting the performance of the transformer. The smaller the wire diameter, the more likely it is to be thinned, and the greater the impact. The invention patent with publication number CN117976407B discloses a wire pressing auxiliary device and method for a transformer winding machine, which presses the winding of the copper wire to regularize the winding from two points, thereby ensuring the compactness between the wire layers. However, this structure of wire pressing roller can only ensure the compactness between the layers, and cannot ensure the compactness between the adjacent two turns of the coil, and cannot solve the problem of insufficient compactness between the wires. SUMMARY

[0005] The purpose of the present application is to provide a full-automatic winding equipment for micro transformer, which aims to solve the problem of uneven winding and non-compactness of the winding machine in the prior art.

[0006] The above technical purpose of the present application is achieved by the following technical scheme:

[0007] The full-automatic winding equipment for micro transformer is characterized by comprising a rotating shaft, one side of the rotating shaft being provided with a pay-off roller, one side of the pay-off roller being provided with a first distance sensor, one side of the rotating shaft being further provided with a wire pressing cylinder, both ends of the wire pressing cylinder being provided with support rods, the wire pressing cylinder being rotationally connected with the support rods, a plurality of movable holes being formed in the wire pressing cylinder, the plurality of movable holes being divided into two groups, one group of the movable holes being arranged in a positive helical shape, the other group of the movable holes being arranged in a reverse helical shape, movable blocks being movably arranged in the movable holes, and a control mechanism being arranged in the wire pressing cylinder and used for controlling the movable blocks in the two groups of movable holes to alternately extend out.

[0008] Through the above technical scheme, the transformer core is fixed on the rotating shaft, the wire on the pay-off roller is pulled to the core, then the wire end is fixed on the pin of the core, the wire is pressed on the surface of the core by the wire pressing cylinder, then the rotating shaft starts to rotate to drive the core to rotate, at this time, the pay-off roller starts to move horizontally, the wire is wound on the surface of the core through the gap between the wire pressing cylinder and the core to form a helical coil, according to the moving direction of the pay-off roller, one group of the movable blocks is controlled to extend out of the movable holes by the control mechanism to form a helical protruding structure on the surface of the wire pressing cylinder, the movable blocks generate a radial pressure to press the wire on the surface of the core, at the same time, the core rotates to generate friction with the wire pressing cylinder to drive the wire pressing cylinder to rotate, the outer diameters of the wire pressing cylinder and the core are inconsistent, so that the linear velocities of the contact positions of the wire pressing cylinder and the core are inconsistent, the movable blocks not only generate the radial pressure to press the wire on the core, but also generate an axial thrust to abut the adjacent two turns of the wire, when the pay-off roller moves to the set position, it represents that the winding of one layer of wire on the core is completed, the first distance sensor generates an electric signal to control the pay-off roller to move reversely to horizontally move to wind the wire on the core for the second layer, at this time, the control mechanism controls the group of movable blocks that have extended out to retract into the movable holes, and controls another group of movable blocks to extend out of the movable holes to form a reverse helical protruding structure on the surface of the wire pressing cylinder to cooperate with the pay-off roller to wind the wire on the core for the second layer, and so on, the two helical protruding structures in different directions are switched to adapt to the winding of the wire in different directions, and the wire is wound more compactly on the core, and the wire pressing cylinder applies the pressure and the thrust on the surface of the copper wire, so as not to affect the winding of the wire at both ends of the core.

[0009] It should be understood that the structures and principles for realizing the functions of driving the rotating shaft to rotate, fixing the wire on the rotating shaft, driving the pay-off roller to move horizontally, pulling the wire to the core pin for fixation, etc. are common technologies in the field, and will not be described in detail here.

[0010] The further arrangement of the present application is that the control mechanism comprises two inflatable hoses arranged in the wire pressing cylinder, two spiral grooves are arranged on the inner wall of the wire pressing cylinder, the two spiral grooves are arranged in a cross double spiral manner, the two inflatable hoses are respectively arranged in the two spiral grooves, the inflatable hoses are respectively provided with the wire pressing cylinder, a plurality of rigid fixing pieces are further arranged in the wire pressing cylinder, the rigid fixing pieces cover the spiral grooves, one side of the rigid fixing piece is fixedly connected with the outer wall of the inflatable hose, and the two ends of the rigid fixing piece are fixedly connected with the inner wall of the wire pressing cylinder; the movable block is fixedly connected with the outer wall of the inflatable hose; and the two inflatable hoses are respectively provided with a bidirectional air pump, and the two bidirectional air pumps are electrically connected with the first distance sensor.

[0011] Through the above technical scheme, when the core starts to wind the first layer of wire, one of the two bidirectional air pumps inflates, and the corresponding inflatable hose expands. Since the rigid fixing piece presses the inflatable hose in the spiral groove, after the internal air pressure of the inflatable hose increases, the inflatable hose can only expand towards the direction of the movable hole, so as to extrude the movable block out of the movable hole. The other bidirectional air pump pumps air, and the inflatable hose shrinks and becomes flat, so as to pull the movable block towards the wire pressing cylinder. When the pay-off roller moves to the set position, it represents that the winding of the first layer of wire on the core is completed, the first distance sensor generates an electric signal, the pay-off roller moves in the opposite direction, the winding of the second layer of copper wire is carried out, the working states of the two bidirectional air pumps are switched, the inflatable bidirectional air pump is switched to the air pumping bidirectional air pump, and the corresponding inflatable hose also completes the switching of inflation and shrinkage. Correspondingly, the two groups of movable blocks complete the switching of the extension and shrinkage states, and the spiral protruding structure on the surface of the wire pressing cylinder completes the reversing. In order to prevent the working interference of the two inflatable hoses at the intersection, the position of the wire pressing cylinder corresponding to the intersection of the two inflatable hoses is not provided with a movable hole and a movable block, and the rigid fixing piece corresponding to the position is arranged in an arc shape to prevent the two inflatable hoses from protruding out of the spiral groove after being overlapped. Through the air pumping and inflation of the bidirectional air pump, the structure is simple, and the switching of the movable block state can be completed in a short time.

[0012] The further arrangement of the present application is that the outer diameter of the movable block is greater than the radius of the wire, the distance between the top of the movable block and the wire pressing cylinder is less than the diameter of the wire when the movable block extends out of the movable hole, the end of the movable block is located in the movable hole when the inflatable hose is in the compressed state, and the end of the movable block is located outside the movable hole when the inflatable hose is in the expanded state.

[0013] Through the technical scheme, the outer diameter of the movable block is larger than the radius of the wire, preventing a gap from being generated when the movable block is inserted between two turns of the wire, and the distance between the top of the movable block and the wire pressing cylinder is smaller than the diameter of the wire, preventing the wire from moving above an adjacent turn of the wire under the action of the axial direction pushing force, and limiting the height of the movable block to prevent the movable block from being completely separated from the movable hole.

[0014] Further provided in the application is that the end of the movable block is provided with a spherical surface, and the surface of the wire pressing cylinder and the end of the movable block are covered with polyurethane rubber.

[0015] Through the technical scheme, the movable block generates pressure and friction force on the surface of the wire, the end of the movable block is provided with a spherical surface and covered with polyurethane rubber, preventing the protruding block and the wire pressing cylinder from scratching the wire, and the polyurethane rubber is elastic, so that the protruding block is deformed and the height becomes lower when the protruding block is pressed on the surface of the copper wire, further preventing the wire from moving above an adjacent turn of the wire under the action of the axial direction pushing force.

[0016] Further provided in the application is that one side of the wire pressing cylinder is provided with a guide cylinder, both end faces of the guide cylinder are provided with guide holes, the inner diameter of the guide hole is equal to the outer diameter of the support rod, the support rod passes through the two guide holes in sequence, a limiting plate is arranged on the support rod, a spring is sleeved on the support rod, the limiting plate and the spring are located inside the guide cylinder, one end of the spring is connected with the limiting plate, and the other end is connected with the inner bottom of the guide cylinder.

[0017] Through the technical scheme, when the wire on the iron core is wound for one layer, the outer diameter becomes larger, the wire layer pushes the position of the wire pressing cylinder outward, at this time, the spring is compressed, the wire pressing cylinder retreats by a proper distance, and the pressure and friction force between the guide cylinder and the wire layer can be prevented from being too large to affect the winding.

[0018] Further provided in the application is that one end of the support rod away from the wire pressing cylinder is provided with a second distance sensor.

[0019] Through the technical scheme, the second distance sensor senses the position of the support rod, and whether the position of the wire pressing cylinder is stable can be judged, when the position of the wire pressing cylinder repeatedly changes, it is indicated that the axis of the iron core rotation and the axis of the rotation shaft are not in a straight line, the winding needs to be stopped, and adjustment is needed.

[0020] Further provided in the application is that one side of the guide cylinder is provided with a servo electric cylinder, the moving end of the servo electric cylinder is connected with the guide cylinder, and the servo electric cylinder is electrically connected with the second distance sensor.

[0021] Through the technical scheme, when the wire on the iron core is wound for one layer, the outer diameter becomes larger, the wire layer pushes the position of the wire pressing cylinder outward, at this time the spring is compressed, the wire pressing cylinder retreats by a proper distance, the position of the supporting rod also retreats, the second distance sensor transmits an electric signal, the movable cylinder controlled by the servo electric cylinder also retreats by a proper distance, so that the degree of spring compression is unchanged, and the pressure of the wire pressing cylinder on the wire layer is unchanged.

[0022] Compared with the prior art, the present application has the beneficial effects that:

[0023] 1. The present application sets the wire pressing cylinder, sets the movable hole arranged in cross double helix structure on the surface of the wire pressing cylinder, sets the movable block capable of extending and retracting in the movable hole, controls the movable hole to extend and retract by the control mechanism, forms the positive helical convex structure and the reverse helical convex structure on the surface of the wire pressing cylinder respectively, the movable block generates a radial pressure to press the wire on the surface of the iron core, and simultaneously generates an axial thrust to press the two adjacent turns of wire tightly, the two different direction helical convex structures are switched to adapt to the winding of the wire in different directions, the wire is wound more compactly on the iron core, and the wire pressing cylinder applies the pressure and the thrust on the surface of the copper wire, and does not affect the winding of the wire at both ends of the iron core.

[0024] 2. The present application sets the bidirectional air pump, judges the winding direction of the wire by the first distance sensor and sends an electric signal, the bidirectional air pump receives the electric signal to switch, the bidirectional air pump in the inflation state becomes the air exhaust, the bidirectional air pump in the air exhaust state is switched to the inflation, and the helical convex structure on the surface of the wire pressing cylinder is completed to switch, so that the structure of the wire in different winding layers is simple and the operation is convenient.

[0025] 3. The present application sets the second distance sensor, when the wire on the iron core is wound for one layer, the outer diameter becomes larger, the second distance sensor detects that the position of the supporting rod retreats, the movable cylinder controlled by the servo electric cylinder also retreats by a proper distance, so that the degree of spring compression is unchanged, and the pressure of the wire pressing cylinder on the wire layer is unchanged, and is kept constant. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] Figure 1 It is a whole structure schematic view of an embodiment of the full-automatic winding equipment for the micro transformer of the present application.

[0028] Figure 2It is the structural schematic view of the pressure wire cylinder in the embodiment of the full-automatic winding equipment for micro transformer of the present application;

[0029] Figure 3 It is the structural schematic view of the control mechanism in the embodiment of the full-automatic winding equipment for micro transformer of the present application;

[0030] Figure 4 It is the structural schematic view of the guide cylinder and the support rod in the embodiment of the full-automatic winding equipment for micro transformer of the present application.

[0031] The figure mark: 1, the rotating shaft; 2, the iron core; 3, the wire releasing roller; 4, the first distance sensor; 5, the pressure wire cylinder; 5a, the movable hole; 5b, the spiral groove; 6, the support rod; 6a, the limiting plate; 7, the movable block; 8, the control mechanism; 8a, the inflatable hose; 8b, the rigid fixed sheet; 9, the two-way air pump; 10, the guide cylinder; 10a, the guide hole; 11, the spring; 12, the second distance sensor; 13, the servo electric cylinder. DETAILED DESCRIPTION

[0032] The technical scheme of the present application will be described clearly and completely in the following in combination with the drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the present application.

[0033] The full-automatic winding equipment for micro transformer provided by the present application, as shown in Figure 1 and Figure 2 , includes a rotating shaft 1, the rotating shaft 1 is provided with a wire releasing roller 3 on one side, the wire releasing roller 3 is provided with a first distance sensor 4 on one side, the rotating shaft 1 is further provided with a pressure wire cylinder 5 on one side, the pressure wire cylinder 5 is provided with support rods 6 at both ends, the pressure wire cylinder 5 is rotationally connected with the support rods 6, a plurality of movable holes 5a are formed on the pressure wire cylinder 5, the plurality of movable holes 5a are divided into two groups, one group of movable holes 5a is arranged in a positive spiral shape, the other group of movable holes 5a is arranged in a reverse spiral shape, a movable block 7 is movably arranged in the movable hole 5a, the outer diameter of the movable block 7 is greater than the radius of the wire, when the movable block 7 extends out of the movable hole 5a, the distance between the top of the movable block 7 and the pressure wire cylinder 5 is less than the diameter of the wire, when the inflatable hose 8a is in a compressed state, the end of the movable block 7 is located in the movable hole 5a, when the inflatable hose 8a is in an expanded state, the end of the movable block 7 is located outside the movable hole 5a, the end of the movable block 7 is arranged in a spherical shape, the surface of the pressure wire cylinder 5 and the end of the movable block 7 are both covered with polyurethane rubber, the pressure wire cylinder 5 is provided with a control mechanism 8 for controlling the movable blocks 7 in the two groups of movable holes 5a to extend alternately.

[0034] AsFigure 2 As shown in the figure, the control mechanism 8 includes two inflatable hoses 8a arranged in the pressing cylinder 5, two spiral grooves 5b are arranged on the inner wall of the pressing cylinder 5, the two spiral grooves 5b are arranged in a cross double spiral manner, the two inflatable hoses 8a are arranged in the two spiral grooves 5b respectively, the movable block 7 is fixedly connected with the outer wall of the inflatable hose 8a, and the two inflatable hoses 8a are provided with a bidirectional air pump 9, and the two bidirectional air pumps 9 are electrically connected with the first distance sensor 4.

[0035] As shown in the figure, Figure 3 The two inflatable hoses 8a are provided with the pressing cylinder 5, and a plurality of rigid fixing pieces 8b are arranged in the pressing cylinder 5, the plurality of rigid fixing pieces 8b cover the spiral groove 5b, one side of the rigid fixing piece 8b is fixedly connected with the outer wall of the inflatable hose 8a, and the two ends of the rigid fixing piece 8b are fixedly connected with the inner wall of the pressing cylinder 5.

[0036] As shown in the figure, Figure 2 and Figure 4 One side of the pressing cylinder 5 is provided with a guide cylinder 10, both end faces of the guide cylinder 10 are provided with guide holes 10a, the inner diameter of the guide hole 10a is equal to the outer diameter of the supporting rod 6, the supporting rod 6 passes through the two guide holes 10a in sequence, the supporting rod 6 is provided with a limiting plate 6a, the supporting rod 6 is sleeved with a spring 11, the limiting plate 6a and the spring 11 are located in the guide cylinder 10, one end of the spring 11 is connected with the limiting plate 6a, the other end is connected with the inner bottom of the guide cylinder 10, and the end of the supporting rod 6 away from the pressing cylinder 5 is provided with a second distance sensor 12.

[0037] As shown in the figure, Figure 2 One side of the guide cylinder 10 is also provided with a servo electric cylinder 13, the moving end of the servo electric cylinder 13 is connected with the guide cylinder 10, and the servo electric cylinder 13 is electrically connected with the second distance sensor 12.

[0038] The working process and principle of the technical scheme are as follows:

[0039] The transformer core 2 is fixed on the rotating shaft 1, the wire on the wire releasing roller 3 is pulled to the core 2, then the wire head is fixed on the pin of the core 2, the wire is pressed on the surface of the core 2 by the wire pressing cylinder 5, at this time, one of the two-way air pump 9 is inflated, the other is exhausted, the movable block 7 is stretched out of the movable hole 5a, forming a spiral convex structure, then the rotating shaft 1 starts to rotate, driving the core 2 to rotate, at this time, the wire releasing roller 3 starts to move horizontally, the wire is wound on the surface of the core 2 through the gap between the wire pressing cylinder 5 and the core 2, forming a spiral coil, the spiral arranged movable block 7 forms a radial pressure on the coil, pressing the wire on the surface of the core 2, at the same time, the core 2 rotates and rubs with the wire pressing cylinder 5, driving the wire pressing cylinder 5 to rotate, the outer diameter of the wire pressing cylinder 5 is inconsistent with that of the core 2, so the linear velocity of the contact place is inconsistent, the movable block 7 will not only generate a radial pressure, but also generate an axial thrust, pushing the wire to the opposite direction of the wire releasing roller 3, and pushing the adjacent two turns of wire tightly, when the wire releasing roller 3 moves to the set position, it represents that the winding of the first layer of wire on the core 2 is completed, the first distance sensor 4 generates an electric signal, controlling the wire releasing roller 3 to move reversely horizontally, winding the second layer of wire on the core 2, at this time, the two-way air pump 9 in the inflated state starts to exhaust, the two-way air pump 9 in the exhausted state starts to inflate, controlling the group of movable blocks 7 that have been stretched out to retract into the movable hole 5a, the other group of movable blocks 7 stretches out of the movable hole 5a, forming a spiral convex structure in the opposite direction on the surface of the wire pressing cylinder 5, cooperating with the wire releasing roller 3 to wind the second layer of wire on the core 2, and so on, through the switching of the spiral convex structures in two different directions, the winding of the wire in different directions is adapted, the wire is wound more compactly on the core 2, at the same time, the wire pressing cylinder 5 applies pressure and thrust on the surface of the copper wire, without affecting the winding of the wire at both ends of the core 2. At the same time, when the first layer of copper wire on the core 2 is wound, the outer diameter becomes larger, the wire layer pushes the position of the wire pressing cylinder 5 outward, at this time, the spring 11 is compressed, the wire pressing cylinder 5 retreats by a proper distance, the second distance sensor 12 detects the distance retreat of the supporting rod 6, transmits an electric signal to the servo electric cylinder 13, controls the distance retreat of the movable cylinder, offsets the distance retreat of the supporting rod 6, and keeps the pressure of the wire pressing cylinder 5 on the wire layer unchanged.

[0040] The multiple layers of copper wire on the core 2 are formed by the interlaced superposition of the forward winding layer and the reverse winding layer, the self-locking force is formed between the layers, and the coil is not easy to loosen after winding.

[0041] At the same time, the winding method of the core 2 rotating to pull the copper wire is adopted in the technical scheme, the forward winding layer and the reverse winding layer can be formed by moving the wire releasing roller forward and backward, if the method of the core 2 rotating forward and reverse is adopted, two different wire releasing rollers must be used to switch back and forth, the efficiency is greatly reduced, and the high-speed winding demand in actual production cannot be met.

[0042] In order to prevent the two groups of movable blocks 7 from interfering with the wire when switching states, the inflatable tube 8a in the expanded state is first deflated, the movable blocks 7 are pulled into the movable hole 5a, and then the other inflatable tube 8a starts to deflate, and the other group of movable blocks 7 is pushed out of the movable hole 5a.

[0043] The technical solution is suitable for a cylindrical iron core 2. When winding the cylindrical iron core 2, if the second distance sensor 12 detects that the position of the wire pressing cylinder 5 repeatedly changes, it indicates that the axis of the iron core 2 rotation is not in line with the axis of the rotating shaft 1, and winding needs to be stopped for adjustment.

[0044] When the technical solution is used for winding the wire on the square iron core 2, the pushing force of the wire pressing cylinder 5 on the square iron core 2 is not uniform when the square iron core 2 rotates, and the rotating speed of the square iron core 2 needs to be controlled, and the rotating speed cannot be too high, so that the wire pressing cylinder 5 always maintains contact with the surface of the iron core 2.

[0045] It should be noted that the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0046] The above description is only a description of the preferred embodiments of the present application, and does not limit the scope of the present application. Any modification or modification of the above disclosure by a person skilled in the art belongs to the protection scope of the claims.

Claims

1. A fully automatic winding device for miniature transformers, characterized in that: The device includes a rotating shaft (1), a wire feeding roller (3) on one side of the rotating shaft (1), a first distance sensor (4) on one side of the wire feeding roller (3), a wire pressing cylinder (5) on one side of the rotating shaft (1), and support rods (6) at both ends of the wire pressing cylinder (5). The wire pressing cylinder (5) is rotatably connected to the support rods (6). The wire pressing cylinder (5) has multiple movable holes (5a) on it. The multiple movable holes (5a) are divided into two groups. One group of movable holes (5a) is arranged in a positive spiral shape, and the other group of movable holes (5a) is arranged in a negative spiral shape. Movable blocks (7) are movably arranged in the movable holes (5a). The wire pressing cylinder (5) is equipped with a control mechanism (8) for controlling the movable blocks (7) in the two groups of movable holes (5a) to extend alternately. The control mechanism (8) includes two inflatable hoses (8a) disposed inside the pressure cylinder (5). Two spiral grooves (5b) are formed on the inner wall of the pressure cylinder (5), arranged in a cross-spiral configuration. The two inflatable hoses (8a) are located within the two spiral grooves (5b), and each inflatable hose (8a) is provided with a... The pressure cylinder (5) also contains multiple rigid fixing plates (8b). The plate (8b) covers the spiral groove (5b), one side of the rigid fixing plate (8b) is fixedly connected to the outer wall of the air hose (8a), both ends of the rigid fixing plate (8b) are fixedly connected to the inner wall of the pressure cylinder (5), the movable block (7) is fixedly connected to the outer wall of the air hose (8a), and both air hoses (8a) are equipped with bidirectional air pumps (9), and both bidirectional air pumps (9) are electrically connected to the first distance sensor (4). The outer diameter of the movable block (7) is greater than the radius of the wire. When the movable block (7) extends out of the movable hole (5a), the distance between the top of the movable block (7) and the wire pressing cylinder (5) is less than the diameter of the wire. When the air hose (8a) is in a compressed state, the end of the movable block (7) is located in the movable hole (5a). When the air hose (8a) is in an expanded state, the end of the movable block (7) is located outside the movable hole (5a).

2. The fully automatic winding device for micro transformers according to claim 1, characterized in that: The end of the movable block (7) is spherical, and the surface of the pressure cylinder (5) and the end of the movable block (7) are covered with polyurethane rubber.

3. The fully automatic winding device for micro transformers according to claim 1, characterized in that: A guide cylinder (10) is provided on one side of the pressure cylinder (5). Guide holes (10a) are provided on both ends of the guide cylinder (10). The inner diameter of the guide hole (10a) is equal to the outer diameter of the support rod (6). The support rod (6) passes through the two guide holes (10a) in sequence. A limiting plate (6a) is provided on the support rod (6). A spring (11) is sleeved on the support rod (6). The limiting plate (6a) and the spring (11) are both located inside the guide cylinder (10). One end of the spring (11) is connected to the limiting plate (6a), and the other end is connected to the inner bottom of the guide cylinder (10).

4. The fully automatic winding device for micro transformers according to claim 3, characterized in that: A second distance sensor (12) is provided at the end of the support rod (6) away from the pressure cylinder (5).

5. The fully automatic winding device for micro transformers according to claim 4, characterized in that: A servo electric cylinder (13) is provided on one side of the guide cylinder (10). The moving end of the servo electric cylinder (13) is connected to the guide cylinder (10). The servo electric cylinder (13) is electrically connected to the second distance sensor (12).

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