Switching power supply transformer, wire pressing device and use method of wire pressing device

Abstract

The invention discloses a switching power supply transformer, a wire pressing device and a use method thereof, and belongs to the technical field of transformers. In order to solve the problems that an existing transformer protection shell cannot fix a lead end, heat dissipation is insufficient, a wire pressing spring is prone to failure, and wire breaking is prone to occurring during winding, for a switching power supply transformer part, a positioning structure is arranged on a base, when the protection shell is installed, a pin block drives a trapezoidal push block, a movable clamping block is pushed to be matched with a fixed clamping block to clamp the lead end, and welding stability is ensured. The wire pressing device adopts the gravity of a bearing box to drive a lever mechanism, so that a wire pressing wheel and a rotating wheel press a wire through a limiting annular groove, the pressing force is adjusted by increasing or decreasing the balance weight, and failure of a spring is avoided. During winding, a hydraulic system is linked with the rubber rotating roller and the rectangular cylinder, a wire is automatically lifted along with external expansion of a coil, and horizontal tension is kept. And the reciprocating screw rod drives the movable seat to realize uniform winding. The transformer assembly efficiency and the operation reliability are obviously improved, and the method is suitable for the fields of electronic equipment and industrial control.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a switching power supply transformer, a wire pressing device and a use method thereof. Background Art

[0002] Switching power supply transformers are core components in switching power supply systems, providing voltage conversion, energy transmission, and electrical isolation. Their design must balance efficiency, size, cost, and reliability. Due to their compact size, high efficiency, and low cost, switching power supply transformers are widely used in electronic equipment, communications and networking equipment, and industrial control and automation.

[0003] In the prior art, transformers still have the following defects during production and assembly:

[0004] 1. To ensure safe use, a protective shell is usually installed on the outer wall of the transformer and fixed to the base or circuit board. However, the protective shell is only installed with bolts or adhesive, which cannot fix the lead ends, resulting in additional positioning during subsequent welding.

[0005] 2. Although the protective shell can protect the transformer, the internal heat cannot be effectively dissipated during operation, resulting in temperature rise that affects stability and life;

[0006] 3. The coil needs to be compressed when winding. In the traditional combination of spring and arc-shaped pressure plate, the spring is prone to failure due to metal fatigue. After long-term use, it is easy to cause wire jump and deviation, affecting performance.

[0007] 4. During the winding process, as the number of coil turns increases, an angle is formed between the wire and the transformer frame, which may cause the wire to become tight or even break.

[0008] In response to the above problems, the present invention document proposes a switching power supply transformer and a wire pressing device and a method for using the same. Summary of the Invention

[0009] The purpose of the present invention is to solve the shortcomings of the existing protective shell, such as the inability to fix the lead end of the transformer during installation, the inability to effectively dissipate heat from the varactor, the inability of the spring force to maintain the wire pressing effect for a long time, and the occurrence of an angle between the wire to be wound and the varactor. A switching power supply transformer, a wire pressing device and a method of using the same are proposed.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A switching power supply transformer is used for positioning the lead end of the transformer when protecting the transformer, and comprises:

[0012] A mounting plate and a base fixed on the top of the mounting plate, wherein a protective shell is provided on the top of the base;

[0013] The positioning structure includes a rectangular groove, a fixed clamping block, a movable clamping block and a sliding rod provided in the base. The fixed clamping block is fixed to one side of the rectangular groove. The movable clamping block is horizontally movable in the rectangular groove via the sliding rod. A tension spring is sleeved on the sliding rod. The two ends of the tension spring are respectively connected to the movable clamping block and the inner wall of the rectangular groove.

[0014] A pin block is fixed to the bottom of the protective shell, and a push block is fixed to one side of the pin block. When the protective shell is installed to the base, the push block abuts the end of the sliding rod and drives the movable clamping block to move toward the fixed clamping block, so that the two cooperate to clamp the transformer lead end.

[0015] In a possible design, a plurality of slots are provided on the top of the base, the pin blocks are slidably inserted into the slots, and the sliding rods horizontally penetrate the side walls of the slots and communicate with the rectangular slots.

[0016] In a possible design, it also includes multiple bolts, which are threadedly connected to the side walls of the slots. The pin blocks are provided with trapezoidal grooves that cooperate with the bolts. When the bolts are screwed in, their ends cooperate with the inclined surfaces of the trapezoidal grooves to drive the protective shell downward.

[0017] In one possible design, the protective shell is provided with a plurality of ventilation holes, the bottom of the ventilation holes forms an outwardly inclined water guide surface, a metal mesh and a plurality of V-shaped plates are provided in the ventilation holes, the openings of the V-shaped plates are facing away from the transformer body, and conical grooves with gradually decreasing cross-sectional areas are formed between adjacent V-shaped plates.

[0018] A wire pressing device, comprising the above-mentioned switching power supply transformer, further comprising:

[0019] A bottom plate and a movable seat slidably connected to the bottom plate, a rectangular cylinder is provided above the movable seat, and a rotating wheel and a wire pressing wheel are provided inside the rectangular cylinder;

[0020] The wire pressing structure includes a first lifting rod, a lever and a second lifting rod. A load-bearing box is provided on the top of the second lifting rod, and its side wall slides with the strip groove of the lever through a pin rod. The lever abuts the bottom of the U-shaped seat at the top of the first lifting rod through a guide wheel, and the wire pressing wheel is rotatably arranged in the U-shaped seat.

[0021] In a possible design, it also includes two vertical plates and a rubber rotating roller rotatably connected between the two vertical plates. The vertical plates are provided with a rectangular lifting groove and a liftable lifting seat. The rubber rotating roller is pivotally connected to the lifting seat. The movable seat is provided with a connecting pipe connecting the first hydraulic cylinder and the second hydraulic cylinder. When the lifting seat moves downward, the second hydraulic piston rod drives the hydraulic oil into the first hydraulic cylinder through the connecting pipe and pushes the rectangular cylinder to rise.

[0022] In a possible design, a reciprocating screw is rotatably provided on the top of the base plate, the movable seat cooperates with the spiral groove of the reciprocating screw through a slider, and a limiting arc plate is fixedly provided on the inner wall of the top of the rectangular cylinder.

[0023] In a possible design, the surfaces of the crimping wheel and the rotating wheel are provided with coaxial corresponding limiting annular grooves.

[0024] In this application, the method for using the wire pressing device includes the following steps:

[0025] S1. Insert the conductor into the rectangular tube and initially limit its position with the limit arc plate. The gravity of the load-bearing box drives the lever, which in turn causes the wire pressing wheel and the rotating wheel to press the conductor under the action of the annular groove. The counterweight block in the load-bearing box can be added or removed to adjust the pressing force to prevent wire jump or deviation.

[0026] S2: The multi-thread rod drives the rectangular cylinder to move back and forth to achieve uniform winding. The outward-expanding coil pushes the lifting seat to press down the second hydraulic piston rod. The hydraulic oil is injected into the first hydraulic cylinder through the connecting pipe to lift the support rod, causing the rectangular cylinder to move upward synchronously to maintain the horizontal tension of the wire and prevent wire breakage.

[0027] S3. Place the transformer behind the line on the base, with the lead end passing through the mounting plate and the rectangular slot. When the protective shell is closed, the pin block is inserted into the slot. Tighten the bolt so that its inclined surface abuts the trapezoidal slot to drive the protective shell downward to seal. Simultaneously, the push block pushes the movable clamp block and the fixed clamp block to clamp the lead end.

[0028] During operation, hot air is discharged through the tapered grooves between the V-shaped plates. The tapered grooves have a tapered cross-section that increases the airflow rate. The metal mesh and the V-shaped plates form a multi-stage water barrier. The inclined surface at the bottom of the ventilation holes diverts condensed water and prevents seepage.

[0029] Beneficial effect: In the present invention, a sliding rod is slidably passed through the inner wall of one side of the slot, one end of the sliding rod is fixedly connected to the movable clamping block, the fixed clamping block is fixed to the side of the rectangular slot away from the sliding rod, and a push block that cooperates with the sliding rod is fixed on one side of the pin block; the pin block is inserted into the slot, and when the pin block moves downward, the pushing force of the push block on the sliding rod can drive the movable clamping block to move inward, and the movable clamping block and the fixed clamping block can clamp and fix the lead end, thereby ensuring the stability of the lead end, which is not only convenient for welding with the pin in the later stage, but also can protect the lead end and avoid its breakage;

[0030] In the present invention, the outer wall of the protective shell is provided with a plurality of ventilation holes, a metal mesh is fixed in the ventilation holes, a plurality of V-shaped plates are fixed in the ventilation holes, and a tapered groove is formed on the side of two adjacent V-shaped plates away from the metal mesh; hot air is discharged through the tapered groove between the two adjacent V-shaped plates. Since the area of the end surface of the tapered groove on the side away from the transformer body is smaller than the area of the other side, the hot air passing through the tapered groove can be accelerated to flow to the outside. In addition, the arrangement of the metal mesh can initially block moisture when moisture penetrates, and the cooperation of the plurality of V-shaped plates can further block moisture. The inclined surface provided at the bottom of the ventilation hole can prevent moisture from penetrating into the base.

[0031] In the present invention, a pin rod is fixed on one side of the two second lifting rods that are close to each other, and a guide wheel is rotatably connected to the top side of the two levers. A bar groove is provided in the two levers, and the pin rod slides with the bar groove; the second lifting rod moves downward, and the lever is driven to rotate through the cooperation of the pin rod and the bar groove, pushing the wire pressing wheel upward, so that the wire pressing wheel can cooperate with the rotating wheel to press the wire, and the rotating wheel and the limiting annular groove in the wire pressing wheel during the pressing process can further limit the wire to avoid wire jumping and deviation. In addition, load-bearing blocks of different weights can be placed in the load-bearing box to increase the gravity of the load-bearing box and the second lifting rod, so as to control the pressing force of the wire pressing wheel on the wire, and thus a long-term wire pressing operation can be completed without using a spring.

[0032] In the present invention, a lifting seat is slidably connected in the two rectangular lifting grooves, the top ends of the two second hydraulic piston rods are fixedly connected to the bottom ends of the two lifting seats respectively, the first hydraulic cylinder is fixed to the bottom inner wall of the sliding groove, the top end of the hydraulic piston rod is fixedly connected to the bottom of the support rod, and the first hydraulic cylinder is connected to the second hydraulic cylinder through a connecting pipe; during the winding process, the number of turns gradually increases, and the outermost coil pushes the rubber rotating roller and the lifting seat to move downward, the lifting seat pushes the second hydraulic piston rod downward, and the hydraulic oil in the second hydraulic cylinder is injected into the first hydraulic cylinder through the connecting pipe, thereby pushing the support rod and the rectangular cylinder to move upward, which will ensure that the wire is always placed horizontally when passing through the rectangular cylinder for winding, thereby avoiding the phenomenon of wire breakage.

[0033] In the present invention, the lead end can be positioned during the process of protecting the transformer body, which is convenient for subsequent welding with the pin, and the heat dissipation and waterproofing of the inside of the protective shell can be achieved. In addition, during the winding process, the weight of the load-bearing box and the second lifting rod enables the wire pressing wheel and the rotating wheel to perform the wire pressing operation stably for a long time. In addition, when winding, the wire passing through the rectangular tube can be wound at a horizontal angle on the magnetic core of the capacitor to avoid the wire breaking due to excessive deviation angle of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the three-dimensional structure of a switching power supply transformer provided in Example 1 of the present invention;

[0035] Figure 2 A schematic diagram of a three-dimensional exploded structure of a switching power supply transformer provided in Example 1 of the present invention;

[0036] Figure 3 A schematic three-dimensional cross-sectional structure diagram of a base of a switching power supply transformer provided in Example 1 of the present invention;

[0037] Figure 4 for Figure 3 A in the middle is an enlarged structural diagram;

[0038] Figure 5 This is a schematic cross-sectional view of a protective shell and a metal mesh of a switching power supply transformer provided in Example 2 of the present invention;

[0039] Figure 6 A schematic diagram of the three-dimensional structure of the wire pressing device provided in Example 1 of the present invention;

[0040] Figure 7 A schematic diagram of a three-dimensional exploded structure of the first hydraulic cylinder, the connecting pipe, and the second hydraulic cylinder of the wire pressing device provided in Example 1 of the present invention;

[0041] Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the movable seat and support rod of the wire pressing device provided in Example 1 of the present invention.

[0042] Figure 9 A schematic three-dimensional cross-sectional view of the rectangular tube of the wire crimping device provided in Example 1 of the present invention;

[0043] Figure 10 A schematic diagram of a three-dimensional exploded structure of the U-shaped seat, the load-bearing box, and the first lifting rod of the wire pressing device provided in Example 1 of the present invention;

[0044] Figure 11 This is a schematic diagram of the three-dimensional exploded structure of the lever, second lifting rod and guide wheel of the wire pressing device provided in Example 1 of the present invention.

[0045] Figure: 1. Mounting plate; 2. Base; 3. Protective shell; 4. Transformer body; 5. Slot; 6. Pin block; 7. Trapezoidal slot; 8. Bolt; 9. Rectangular slot; 10. Fixed clamp; 11. Movable clamp; 12. Sliding rod; 13. Tension spring; 14. Push block; 15. Ventilation hole; 16. Metal mesh; 17. V-shaped plate; 18. Conical slot; 19. First hydraulic cylinder; 20. Hydraulic piston rod; 21. Vertical plate; 22. Rectangular lifting slot; 23. Lifting seat; 24. Rotating shaft; 25. Rubber Glue rotating roller; 26. Second hydraulic cylinder; 27. Second hydraulic piston rod; 28. Connecting pipe; 29. Give way groove; 30. Reciprocating screw; 31. Rectangular cylinder; 32. Rotating wheel; 33. First lifting rod; 34. U-shaped seat; 35. Pressing wheel; 36. Limiting arc plate; 37. Second lifting rod; 38. Load-bearing box; 39. Lever; 40. Guide wheel; 41. Strip groove; 42. Pin rod; 43. Bottom plate; 44. Moving seat; 45. Sliding groove; 46. Support rod; 47. Limiting annular groove. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] Example 1: Reference Figure 1-Figure 4 , transformer, relates to the technical field of transformers, and is used to position the lead end of the transformer when protecting it, including a mounting plate 1 and a base 2 fixed on the top of the mounting plate 1, a transformer body 4 is placed on the top of the base 2, and a protective shell 3 for protecting the transformer body 4 is provided on the top of the base 2; in order to be able to position the lead end of the transformer body 4 when the protective shell 3 and the base 2 are installed, a positioning structure is provided between the base 2 and the protective shell 3, and the positioning structure includes a rectangular groove 9 arranged in the base 2 and a fixed clamp 10 and a movable clamp 11 arranged in the rectangular groove 9.

[0048] refer to Figure 2-Figure 4The positioning structure also includes a plurality of slots 5 provided on the top of the base 2, a plurality of pin blocks 6 are fixed to the bottom of the protective shell 3, and the pin blocks 6 slide and extend into the slots 5, and a sliding rod 12 extending into the adjacent rectangular slot 9 is slidably penetrated by the inner wall of one side of one slot 5, and one end of the sliding rod 12 is fixedly connected to the mobile clamping block 11, and the fixed clamping block 10 is fixed to the side of the rectangular slot 9 away from the sliding rod 12. The mobile clamping block 11 cooperates with the sliding rod 12 to clamp and fix the lead end of the transformer body 4, and the outer wall sleeve of the sliding rod 12 A tension spring 13 is provided which is fixedly connected to the movable clamping block 11 (the parameters of the tension spring 13 are preferably: wire diameter 0.5-2mm, outer diameter 5-15mm, free length 20-100mm, elastic coefficient 5-20N / mm, the specific values are selected according to the size of the lead end and the clamping force requirements). One end of the tension spring 13 is fixedly connected to the inner wall of one side of the rectangular groove 9, which is used to release the clamping of the lead end by the movable clamping block 11 in a natural state. A push block 14 which cooperates with the sliding rod 12 is fixed to one side of the pin block 6 (the push block 14 can be set to The push block is designed with various cross-sectional shapes to adapt to different installation spaces and thrust requirements, including but not limited to: a triangular push block, whose single bevel structure can achieve fast linear displacement and is suitable for high-frequency plugging and unplugging conditions; a wedge-shaped push block, which adopts double asymmetric bevels and can adjust the clamping force in stages to adapt to multiple specifications of lead ends; an arc-shaped push block, which reduces sliding friction through curved surface contact and extends the service life of the sliding rod 12; a trapezoidal push block, which can achieve the positioning of the lead end; a polygonal push block, which enhances the meshing stability with the sliding rod 12 through the angular structure) used to move the sliding rod 12 is pushed toward the middle; the transformer body 4 is placed on the base 2, and its lead end passes through the rectangular slot 9. When the protective shell 3 covers the outside of the transformer and is placed on the top of the base 2, the pin block 6 is inserted into the slot 5. When the pin block 6 moves downward, the thrust of the sliding rod 12 by the push block 14 can drive the movable clamping block 11 to move inward. The movable clamping block 11 and the fixed clamping block 10 can clamp and fix the lead end to ensure the stability of the lead end, which is not only convenient for later welding with the pin, but also can protect the lead end to avoid its breakage.

[0049] refer to Figure 3 and Figure 4The positioning structure also includes a plurality of bolts 8, one end of each of the bolts 8 is threadedly extended into the slot 5, and a plurality of pin blocks 6 are provided with a trapezoidal groove 7 on one side close to the bolt 8, and one end of the bolt 8 extends into the trapezoidal groove 7 and cooperates with the inclined surface of the trapezoidal groove 7, which is used to make the protective shell 3 close to the base 2 during the tightening of the bolt 8; when the protective shell 3 is covered on the outside of the transformer and placed on the top of the base 2, the pin block 6 is inserted into the slot 5, and then the bolt 8 is tightened and one end of the bolt 8 is pushed to extend into the trapezoidal groove 7, and one end of the bolt 8 cooperates with the inclined surface at the bottom of the trapezoidal groove 7 to drive the protective shell 3 to move downward, thereby making the base 2 and the protective shell 3 fit tightly to ensure fixation, and when the pin block 6 moves downward, the thrust of the push block 14 on the sliding rod 12 can drive the movable clamping block 11 to move inward, thereby clamping and fixing the lead end.

[0050] Reference Figure 6 and Figure 9 , a wire pressing device relates to the technical field of transformers, including the above-mentioned transformer, and also includes a base plate 43, the top of the base plate 43 is slidably connected to a movable seat 44, a rectangular cylinder 31 is provided above the movable seat 44, and a rotating wheel 32 and a wire pressing wheel 35 are provided in the rectangular cylinder 31, and the two are used to limit and press the wire to be wound; in order to enable the wire pressing wheel 35 to move up and cooperate with the rotating wheel 32 to perform the wire pressing operation of the wire, a wire pressing structure is provided in the rectangular cylinder 31, and the wire pressing structure includes a first lifting rod 33 that slides through the bottom inner wall of the rectangular cylinder 31 and two levers 39 that rotate in the rectangular cylinder 31.

[0051] Reference Figure 6 and Figure 7 , which also includes two vertical plates 21 fixed on the top of the bottom plate 43, and the varactor core to be wound is wound between the two vertical plates 21, and the two vertical plates 21 are rotatably connected with the same rotating shaft 24, and the outer wall of the rotating shaft 24 is fixedly sleeved with a rubber rotating roller 25, and the rubber rotating roller 25 cooperates with the outermost coil of the varactor core to be wound. In order to enable the wire passing through the rectangular tube 31 to be arranged horizontally with the outermost coil of the varactor core during the varactor winding process, an automatic adjustment structure is provided on the movable seat 44 and the bottom plate 43, and the automatic adjustment structure includes two second hydraulic cylinders 26 fixed on the top of the bottom plate 43 and a first hydraulic cylinder 19 fixed in the movable seat 44, and the second hydraulic cylinder 26 and the first hydraulic cylinder 19 are respectively sealed and slidably connected with the second hydraulic piston rod 27 and the hydraulic piston rod 20, and the second hydraulic piston rod 27 and the hydraulic piston rod 20 extend to the top of the second hydraulic cylinder 26 and the first hydraulic cylinder 19 respectively.

[0052] Reference Figures 9-11The wire pressing structure also includes two second lifting rods 37 that slide through the inner wall of the bottom of the rectangular cylinder 31. The tops of the two second lifting rods 37 are fixed with load-bearing boxes 38. Load-bearing blocks are placed in the load-bearing boxes 38 to increase the gravity of the second lifting rods 37. The two second lifting rods 37 are fixed with pins 42 on the sides close to each other through the base. The top of the first lifting rod 33 is fixed with a U-shaped seat 34. The wire pressing wheel 35 rotates in the U-shaped seat 34. The top side of the two levers 39 is connected to a guide wheel 40 through the base. The guide wheel 40 cooperates with the bottom of the U-shaped seat 34. The two levers 39 are provided with strip grooves 41. The pin 42 slides with the strip groove 41. The second lifting rod 37 is fixed with a pin 42 and a strip groove 41. The combination can drive the lever 39 to rotate, thereby driving the U-shaped seat 34 to move upward, and the rotating wheel 32 rotates in the rectangular tube 31, and the rectangular tube 31 is located above the wire pressing wheel 35; the load-bearing box 38 and the second lifting rod 37 move downward under the action of their own gravity, and push the wire pressing wheel 35 upward through the lever 39, and then the wire pressing wheel 35 can cooperate with the rotating wheel 32 to press the wire, and during the pressing process, the rotating wheel 32 and the limiting annular groove 47 in the wire pressing wheel 35 can further limit the wire to avoid wire jumping and deviation. In addition, load-bearing blocks of different weights can be placed in the load-bearing box 38 to increase the gravity of the load-bearing box 38 and the second lifting rod 37, which can control the pressing force of the wire pressing wheel 35 on the wire.

[0053] Reference Figure 6-Figure 8The automatic adjustment structure also includes two rectangular lifting slots 22, which are respectively arranged in the corresponding vertical plates 21. The two rectangular lifting slots 22 are slidably connected with lifting seats 23. The two ends of the rotating shaft 24 rotate through the two lifting seats 23. The top ends of the two second hydraulic piston rods 27 are respectively fixedly connected to the bottom of the two lifting seats 23, which are used to drive the second hydraulic piston rods 27 to move up and down. A sliding slot 45 is provided on the top of the mobile seat 44. A support rod 46 is slidably connected in the sliding slot 45. The top end of the support rod 46 is fixedly connected to the bottom of the rectangular cylinder 31, which is used to drive the rectangular cylinder 31 to move up and down. The first hydraulic cylinder 19 is fixed to the bottom inner wall of the sliding slot 45, and the top end of the hydraulic piston rod 20 is fixedly connected to the top inner wall of the support rod 46. , used to drive the support rod 46 to move up and down, connecting pipes 28 are fixed on both sides of the first hydraulic cylinder 19, and the two connecting pipes 28 are fixedly connected to the corresponding second hydraulic cylinder 26 respectively, and both sides of the movable seat 44 are provided with a makeshift groove 29 connected to the sliding groove 45, and the makeshift groove 29 is used to make way for the connecting pipe 28; during the winding process, the number of turns gradually increases, and the outermost coil pushes the rubber rotating roller 25 and the lifting seat 23 to move downward, and the lifting seat 23 pushes the second hydraulic piston rod 27 downward, and the hydraulic oil in the second hydraulic cylinder 26 is injected into the first hydraulic cylinder 19 through the connecting pipe 28, thereby pushing the support rod 46 and the rectangular cylinder 31 to move upward, which can ensure that the wire is always placed horizontally when passing through the rectangular cylinder 31 for winding, thereby avoiding the phenomenon of wire breakage.

[0054] Reference Figure 6 、 Figure 7 and Figure 9 The top of the bottom plate 43 is connected to the reciprocating screw 30 through the base rotation. One end of the reciprocating screw 30 passes through the moving seat 44. The moving seat 44 slides with the spiral groove on the outer wall of the reciprocating screw 30 through the slider, which is used to drive the moving seat 44 to move back and forth so that the wire is evenly wound on the magnetic core of the varactor. Two limiting arc plates 36 are fixed to the top inner wall of the rectangular tube 31. The two limiting arc plates 36 are respectively located on both sides of the rotating wheel 32 for preliminarily limiting the wire.

[0055] Reference Figure 10 The outer walls of the pressing wheel 35 and the rotating wheel 32 are both provided with a limiting annular groove 47 , and the pressing wheel 35 and the rotating wheel 32 can limit and suppress the wire through the limiting annular groove 47 .

[0056] Example 2: Reference Figure 5, improved on the basis of Example 1: the outer wall of the protective shell 3 is provided with a plurality of ventilation holes 15, and the bottoms of the plurality of ventilation holes 15 are provided with an inclined surface inclined outward for guiding moisture to the outside, and a metal mesh 16 is fixed in the ventilation hole 15, and the metal mesh 16 is located at a position where the ventilation hole 15 is away from the transformer body 4. The metal mesh 16 forms an electromagnetic shield to protect the transformer body 4 inside the protective shell 3, and a plurality of V-shaped plates 17 are fixed in the ventilation hole 15, and the openings of the V-shaped plates 17 are facing outward to block moisture from penetrating into the protective shell 3, and a conical groove is formed on the side of two adjacent V-shaped plates 17 away from the metal mesh 16. 18 is used to reduce the cross-sectional area when the hot air is discharged and increase the speed of hot air discharge; when the transformer body 4 is running, the temperature inside the protective shell 3 rises, and the hot air is discharged through the conical groove 18 between the two adjacent V-shaped plates 17. Since the area of the end face of the conical groove 18 on one side away from the transformer body 4 is smaller than the area of the other side, the hot air passing through the conical groove 18 can be accelerated to flow to the outside. In addition, the setting of the metal mesh 16 can initially block the moisture when moisture penetrates, and the cooperation of multiple V-shaped plates 17 can further block the moisture, and the inclined surface set at the bottom of the ventilation hole 15 can prevent moisture from penetrating into the base 2.

[0057] The method for using the wire pressing device includes the following steps:

[0058] S1. When winding the transformer, the wire to be wound passes through the rectangular tube 31, and the two limiting arc plates 36 preliminarily limit the wire. The load-bearing box 38 and the second lifting rod 37 move downward under the action of their own gravity, and push the pressing wheel 35 upward through the lever 39, so that the pressing wheel 35 can cooperate with the rotating wheel 32 to press the wire, and during the pressing process, the rotating wheel 32 and the limiting annular groove 47 in the pressing wheel 35 can further limit the wire to avoid wire jumping and deviation. In addition, load-bearing blocks of different weights can be placed in the load-bearing box 38 to increase the gravity of the load-bearing box 38 and the second lifting rod 37, so as to control the pressing force of the pressing wheel 35 on the wire.

[0059] S2. During winding, the motor drives the reciprocating screw 30 to rotate, and the reciprocating screw 30 drives the movable seat 44 and the rectangular cylinder 31 to move back and forth linearly, so that the wire is wound evenly. During the winding process, the number of turns gradually increases, and the outermost coil pushes the rubber rotating roller 25 and the lifting seat 23 to move downward. The lifting seat 23 pushes the second hydraulic piston rod 27 downward, and the hydraulic oil in the second hydraulic cylinder 26 is injected into the first hydraulic cylinder 19 through the connecting pipe 28, thereby pushing the support rod 46 and the rectangular cylinder 31 to move upward, which will ensure that the wire is always placed horizontally when passing through the rectangular cylinder 31 for winding, thereby avoiding the phenomenon of wire breakage;

[0060] S3. After the transformer is wound, it is placed on the base 2, and its lead ends are sequentially passed through the rectangular slot 9 and the mounting plate 1. When the protective shell 3 is covered on the outside of the transformer and placed on the top of the base 2, the pin block 6 is inserted into the slot 5, and then the bolt 8 is tightened and one end of the bolt 8 is pushed to extend into the trapezoidal slot 7. One end of the bolt 8 cooperates with the inclined surface at the bottom of the trapezoidal slot 7 to drive the protective shell 3 to move downward, thereby making the base 2 and the protective shell 3 fit tightly together to ensure fixation. When the pin block 6 moves downward, the push force of the push block 14 on the sliding rod 12 can drive the movable clamping block 11 to move inward. The movable clamping block 11 and the fixed clamping block 10 can clamp and fix the lead end to ensure the stability of the lead end, which is not only convenient for welding with the pin in the later stage, but also can protect the lead end to avoid its breakage.

[0061] S4. When the transformer body 4 is in operation, the temperature inside the protective shell 3 rises, and the hot air is discharged through the tapered groove 18 between two adjacent V-shaped plates 17. Since the area of the end surface of the tapered groove 18 on the side away from the transformer body 4 is smaller than the area of the other side, the hot air passing through the tapered groove 18 can be accelerated to flow to the outside. In addition, the setting of the metal mesh 16 can initially block the moisture when moisture penetrates. The cooperation of multiple V-shaped plates 17 can further block the moisture, and the water-guiding surface provided at the bottom of the ventilation hole 15 can prevent moisture from penetrating into the base 2.

[0062] The drawings in this application are for illustrative purposes only. The sizes and shapes of the components shown are not intended to be limiting, but are merely for illustrative purposes. In actual implementation, the components may be appropriately configured and adjusted based on specific needs and actual conditions.

[0063] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A switching power supply transformer, used for positioning the lead end of the transformer when protecting the transformer, comprising a mounting plate (1) and a base (2) fixed on the top of the mounting plate (1), wherein a protective shell (3) is provided on the top of the base (2), characterized in that: Also includes: A positioning structure comprises a rectangular groove (9) provided in a base (2), a fixed clamping block (10), a movable clamping block (11) and a sliding rod (12), wherein the fixed clamping block (10) is fixed to one side of the rectangular groove (9), the movable clamping block (11) is arranged in the rectangular groove (9) so as to be horizontally movable via the sliding rod (12), a tension spring (13) is sleeved on the sliding rod (12), and the two ends of the tension spring (13) are respectively connected to the movable clamping block (11) and the inner wall of the rectangular groove (9); A pin block (6) is fixed to the bottom of the protective shell (3), and a push block (14) is fixed to one side of the pin block (6). When the protective shell (3) is mounted on the base (2), the push block (14) abuts against the end of the sliding rod (12) and drives the movable clamping block (11) to move toward the fixed clamping block (10), so that the two cooperate to clamp the transformer lead end.

2. A switching power supply transformer according to claim 1, characterized in that: The top of the base (2) is provided with a plurality of slots (5), the pin blocks (6) are slidably inserted into the slots (5), and the sliding rods (12) horizontally penetrate the side walls of the slots (5) and communicate with the rectangular slots (9).

3. A switching power supply transformer according to claim 2, characterized in that: It also includes a plurality of bolts (8), the bolts (8) being threadedly connected to the side wall of the slot (5), the pin block (6) being provided with a trapezoidal groove (7) cooperating with the bolt (8), and when the bolt (8) is screwed in, the end thereof cooperates with the inclined surface of the trapezoidal groove (7) to drive the protective shell (3) downward.

4. A switching power supply transformer according to claim 2, characterized in that: The protective shell (3) is provided with a plurality of ventilation holes (15), the bottom of the ventilation holes (15) forms a water guide surface inclined outward, a metal mesh (16) and a plurality of V-shaped plates (17) are provided in the ventilation holes (15), the openings of the V-shaped plates are facing away from the transformer body (4), and conical grooves (18) with gradually decreasing cross-sectional areas are formed between adjacent V-shaped plates (17).

5. A wire pressing device comprising a switching power supply transformer according to claim 4, characterized in that: Also includes: A bottom plate (43) and a movable seat (44) slidably connected to the bottom plate, a rectangular cylinder (31) is provided above the movable seat (44), and a rotating wheel (32) and a pressing wheel (35) are provided inside the rectangular cylinder (31); The wire pressing structure comprises a first lifting rod (33), a lever (39) and a second lifting rod (37). A load-bearing box (38) is provided on the top of the second lifting rod (37), and its side wall is slidably matched with the strip groove (41) of the lever (39) through a pin rod (42). The lever (39) abuts against the bottom of the U-shaped seat (34) at the top of the first lifting rod (33) through a guide wheel (40), and the wire pressing wheel (35) is rotatably arranged in the U-shaped seat (34).

6. The wire pressing device according to claim 5, characterized in that: The invention also comprises two vertical plates (21) and a rubber rotating roller (25) rotatably connected between the two vertical plates (21). A rectangular lifting groove (22) and a lifting seat (23) capable of lifting are provided in the vertical plates (21). The rubber rotating roller (25) is pivotally connected to the lifting seat (23). The movable seat (44) is provided with a connecting pipe (28) connecting the first hydraulic cylinder (19) and the second hydraulic cylinder (26). When the lifting seat (23) moves downward, the second hydraulic piston rod (27) drives the hydraulic oil to enter the first hydraulic cylinder (19) through the connecting pipe (28) and push the rectangular cylinder (31) to rise.

7. The wire pressing device according to claim 6, characterized in that: A reciprocating screw rod (30) is rotatably provided on the top of the bottom plate (43), the movable seat (44) cooperates with the spiral groove of the reciprocating screw rod (30) through a slider, and a limiting arc plate (36) is fixedly provided on the inner wall of the top of the rectangular tube (31).

8. The wire pressing device according to claim 7, characterized in that: The surfaces of the crimping wheel (35) and the rotating wheel (32) are provided with coaxial corresponding limiting annular grooves (47).

9. A method for using a wire crimping device, applied to the wire crimping device according to claim 8, characterized in that: The following steps are involved: S1. Insert the wire into the rectangular tube (31), and initially limit the position through the limiting arc plate (36). The weight of the load-bearing box (38) drives the lever (39), so that the wire pressing wheel (35) and the rotating wheel (32) press the wire under the action of the annular groove (47). The weight block in the load-bearing box (38) can be increased or decreased to adjust the pressing force to suppress wire jump or deviation; S2, the multi-thread rod (30) drives the rectangular cylinder (31) to move back and forth to achieve uniform winding, the outward-expanding coil pushes the lifting seat (23) to press down the second hydraulic piston rod (27), and the hydraulic oil is injected into the first hydraulic cylinder (19) through the connecting pipe (28) to lift the support rod (46), so that the rectangular cylinder (31) moves upward synchronously to maintain the horizontal tension of the wire and prevent wire breakage; S3, the transformer behind the line is placed on the base (2), the lead end passes through the mounting plate (1) and the rectangular slot (9), the pin block (6) is inserted into the slot (5) when the protective shell (3) is closed, the bolt (8) is tightened so that its inclined surface abuts the trapezoidal slot (7) to drive the protective shell (3) to press down and seal, and the movable clamp block (11) and the fixed clamp block (10) are pushed by the push block (14) to clamp the lead end; S4. During operation, the hot air flows through the tapered groove (18) between the V-shaped plates (17) to be discharged quickly. The cross section of the tapered groove (18) is a tapered structure that increases the airflow rate. The metal mesh (16) and the V-shaped plates (17) form a multi-stage water barrier. The bottom slope of the ventilation hole (15) is structured to achieve condensed water diversion and anti-seepage.

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