A length cutting device for circuit breaker lead

Abstract

The utility model discloses a circuit breaker lead fixed-length cutting device, including lead transmission track, the pay-off mechanism for lead pay-off that is set gradually for lead transmission track extension direction, the welding knot mechanism for welding knot on lead at equal interval and the cutting mechanism for cutting the lead welding knot part, be provided with the lead slot for lead positioning on lead transmission track, still be equipped with the fixed-length mechanism for the fixed-length cutting of the fixed-length mechanism of the lead of the lead transmission track setting length for cutting mechanism to pull out in front of lead transmission track, the fixed-length mechanism includes fixed-length base, sets up on the fixed-length base fixed-length sliding platform air cylinder and sets up on the movable end of fixed-length sliding platform air cylinder for the finger air cylinder of clamping lead end, fixed-length sliding platform air cylinder drives finger air cylinder to move towards the direction of approaching or moving away from lead transmission track. The utility model can replace manual realization lead fixed-length cutting and end welding joint, not only high efficiency, and the qualified rate of product has been improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker processing technology, and in particular to a lead wire length cutting device for a circuit breaker core thermal assembly. Background Technology

[0002] The thermal assembly of a circuit breaker mechanism is a core component for overload protection, primarily utilizing the thermal effect of a bimetallic strip to protect the circuit. This assembly typically consists of contact supports, levers, pins, limiting components, torsion springs, mechanism springs, moving contacts, and leads. When an overload current occurs in the circuit, the thermal element heats up, causing the bimetallic strip to bend and push the mechanical structure to separate the contacts, thus cutting off the circuit and preventing damage from prolonged overload. During circuit breaker production, the various components must be assembled. The most challenging step is welding the contacts and leads to the semi-finished mechanism. Traditionally, the leads were manually welded to the contacts first, and then the leads were welded to the contact supports on the semi-finished mechanism. However, this manual assembly method is extremely inefficient and has a high defect rate, making it unsuitable for long-term business development.

[0003] Therefore, developing an assembly device for the thermal components of circuit breakers to automate the assembly of these components is crucial. This assembly device requires pulling wires from a reel and cutting them into segments of equal length as connecting leads. Since the wires are made of two or more metal wires wound together, the ends of the cut connecting leads require additional welding to connect them. Previously, the cutting was done manually first, followed by welding the ends of the connecting leads sequentially. Therefore, achieving fixed-length lead cutting and welding connections at both ends is a challenge that engineers must overcome in the circuit breaker thermal component assembly device. Utility Model Content

[0004] The purpose of this invention is to provide a circuit breaker lead wire length cutting device. This invention can replace manual labor to achieve length cutting and end welding connection of the lead wire, which is not only highly efficient, but also greatly improves the product qualification rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a circuit breaker lead wire length-cutting device, comprising a lead wire transmission track, a lead wire feeding mechanism arranged sequentially along the extension direction of the lead wire transmission track, a wire bonding mechanism for welding wire knots at equal intervals on the lead wire, and a cutting mechanism for cutting the wire bonding portion of the lead wire. The lead wire transmission track is provided with a lead wire groove for lead wire positioning. A length-cutting mechanism is also provided in front of the lead wire transmission track for pulling the lead wire out of the lead wire transmission track by a set length for the cutting mechanism to perform length-cutting. The length-cutting mechanism includes a length-cutting base, a length-cutting slide cylinder disposed on the length-cutting base, and a finger cylinder disposed on the movable end of the length-cutting slide cylinder for clamping the end of the lead wire. The length-cutting slide cylinder drives the finger cylinder to move toward or away from the lead wire transmission track.

[0006] By adopting the above technical solution, during the lead wire transmission process, the wire bonding mechanism welds multiple wire knots at equal intervals on the lead wire, the fixed length mechanism pulls out the lead wire of a set length, and the cutting mechanism cuts the first section of the lead wire according to the position of the wire knot. After removing the section of the lead wire, the above steps are repeated. This replaces manual cutting of the lead wire to a fixed length and welding connection at the end, which is not only more efficient, but also greatly improves the product qualification rate.

[0007] The present invention is further configured such that the fixed-length base includes a base plate, two upright plates disposed on the base plate, and an adjusting plate disposed on the two upright plates in a direction that can slide toward or away from the lead wire transmission track. The bottom of the adjusting plate is provided with two sliding grooves for the top of the upright plates to extend into. A positioning seat is provided between the two upright plates. An adjusting screw is rotatably mounted on the positioning seat, and a retaining spring is respectively engaged with the adjusting screw at the positions on both sides of the positioning seat. The bottom of the adjusting plate is provided with a transmission nut that forms a threaded engagement with the adjusting screw.

[0008] By adopting the above technical solution, the adjusting plate can be moved by rotating the adjusting screw, so as to make fine adjustment of the length of the single lead wire after cutting, so as to adapt it to products of different specifications.

[0009] The present invention is further configured such that the fixed-length base includes two limiting protrusions, the limiting protrusions include a positioning part with a rectangular bottom cross section and a limiting part with a dovetail-shaped positioning cross section, the upper end of the upright plate is provided with a positioning groove, the positioning part is fixed in the positioning groove by fasteners, and the adjusting plate is provided with a limiting groove that cooperates with the limiting part at the position corresponding to the upper end of the sliding groove.

[0010] By adopting the above technical solution, the adjusting plate can be vertically limited, so that it can only move along the extension direction of the limiting protrusion, which greatly improves the stability of the adjusting plate position adjustment.

[0011] The present invention is further configured such that the cutting mechanism includes a cutting bracket, a blade holder located at the end of the lead wire transmission track corresponding to the cutting bracket, a lower blade located on the blade holder, an upper blade movably located above the lower blade, a cutting cylinder located on the cutting bracket, and a movable plate connected to the movable end of the cutting cylinder. The upper blade is mounted on the movable plate, and a guide rail is also mounted vertically on the cutting bracket. A slider that cooperates with the guide rail is provided on the movable plate.

[0012] By adopting the above technical solution, the upper blade is moved closer to the lower blade by the cutting cylinder to cut the lead wire. The structure is simple and the cutting action is very efficient.

[0013] The present invention is further configured such that: the blade holder is provided with a movable groove, a floating block is provided in the movable groove, the lower blade is installed at a position in front of the blade holder corresponding to the movable groove to limit the floating block; a T-shaped guide block is provided at the inner end of the blade holder corresponding to the movable groove, the lower end of the T-shaped guide block is provided with a T-shaped guide groove that cooperates with the T-shaped guide block, and when the floating block moves vertically, the T-shaped guide groove can be vertically displaced relative to the T-shaped guide block; a floating spring is provided between the floating block and the blade holder for applying an upward force to the floating block; the floating block is provided with a floating groove and a cutting pressure block for confining the lead wire in the floating groove.

[0014] By adopting the above technical solution, during the process of the upper blade cutting the lead wire downward, it comes into contact with the floating block and pushes the floating block downward. The floating block not only makes way for the upper blade so that it can continue to move downward and cooperate with the lower blade to cut the lead wire, but also supports and positions the lead wire, thereby ensuring a good cutting effect on the lead wire.

[0015] The present invention is further configured such that the wire bonding mechanism includes a welding base disposed below the lead wire transmission track, a lower electrode plate disposed on the welding base, a lower welding head disposed on the lower electrode plate, a movable seat disposed above the lead wire transmission track, an upper electrode plate disposed at the bottom of the movable seat, and an upper welding head disposed on the upper electrode plate. The welding base is also provided with two columns, and the movable seat is provided with two linear bearings respectively sleeved on the outer periphery of the corresponding columns. The upper ends of the two columns are also provided with cylinder plates, and welding cylinders are mounted on the cylinder plates. The movable end of the welding cylinder is connected to the movable seat for driving the movable seat to move vertically. The middle part of the lead wire transmission track is provided with a welding cut for the lower end of the upper welding head and the upper end of the lower welding head to extend into.

[0016] By adopting the above technical solution, the welding cylinder drives the upper welding head to move towards the lower welding head to perform the wire bonding process, making the welding action highly efficient.

[0017] The present invention is further configured such that the welding wire bonding mechanism includes a first welding head seat and a second welding head seat respectively disposed on the left and right sides of the lower electrode plate; the upper end of the first welding head seat is provided with a first guide groove along the vertical direction and a second guide groove extending toward the welding fracture direction and communicating with the first guide groove; a welding head top plate is slidably disposed on the upper end of the first guide groove along the vertical direction; a push screw for pushing the welding head top plate downward when moving downward is connected to the lower end of the movable seat; a first return spring for applying an upward force to the welding head top plate is disposed at the inner end of the first guide groove; a first welding head slide is slidably disposed in the second guide groove; a first small welding head is horizontally mounted on the upper end of the first welding head slide; a push inclined surface for pushing the first welding head slide toward the direction close to the welding fracture when moving downward is provided on the side of the welding head top plate; and a push inclined surface for moving upward and connecting with the first welding head slide when moving upward is provided at the bottom of the welding head top plate. The lower ends of the welding head slide abut against each other to form a limiting flange for upper stroke limitation. A second return spring is also installed on the first welding head seat to apply a force to the first welding head slide in the direction away from the weld fracture. A third guide groove is vertically opened on the upper edge of the second welding head seat, and the second welding head slide is slidably arranged on the upper edge of the third guide groove. A second small welding head is horizontally installed on the upper edge of the second welding head slide. The second small welding head abuts against the right side of the lower welding head. A limiting plate is provided at the upper end of the second welding head seat to form an upper stroke limitation for the second welding head slide. A third return spring is installed on the second welding head seat at a position corresponding to the lower part of the second welding head slide to apply an upward force to the second welding head slide. When the upper welding head moves downward and abuts against the upper end of the second small welding head, the right end of the first small welding head abuts against the left side of the upper welding head, and the lower side of the first small welding head abuts against the upper end of the lower welding head.

[0018] By adopting the above technical solution, when the wire bonding action is performed, the upper and lower welding heads work together to apply a vertical compressive force to the lead wire, and the first and second small welding heads work together to apply a horizontal compressive force to the lead wire. As a result, four positive pressures are formed on the lead wire from top to bottom and left to right to compress it. This part is heated and welded into a wire knot with a rectangular cross-section. The weld is not only very strong, but the surface of the wire knot is also smooth and flat, which is conducive to subsequent assembly.

[0019] The present invention is further configured such that a set of stop components are respectively provided on the lead wire transmission track at the positions corresponding to the welding knot mechanism and the rear side of the cutting mechanism. The stop components include a stop seat, a stop cylinder installed on the stop seat, and a wire clamping block installed on the movable end of the stop cylinder. The stop cylinder drives the wire clamping block to extend downward into or upward out of the lead wire groove.

[0020] By adopting the above technical solution and setting a stop component, the transport of the lead wire can be paused in advance before the welding and cutting processes, thereby ensuring the stable execution of welding and cutting operations.

[0021] The present invention is further configured such that the lead wire transmission track is provided with multiple sets of pre-compression components. The pre-compression components include a pre-compression mounting block, a pre-compression block, and a pre-compression tension spring. The pre-compression mounting block is disposed on the lead wire transmission track. The upper end of the pre-compression block is rotatably disposed on the pre-compression mounting block. One end of the pre-compression tension spring is fixed to the pre-compression mounting block, and the other end of the pre-compression tension spring overlaps with the lower end of the pre-compression block, so that the pre-compression block presses the lead wire tightly in the lead wire groove. The lower end of the pre-compression block is inclined towards the lead wire transmission direction.

[0022] By adopting the above technical solution, the pre-compression block of the pre-compression component can stably restrict the lead wire in the groove of the lead wire transmission track under the action of the tension spring, thereby improving the stability of its transportation. At the same time, the pre-compression block can also prevent the lead wire from backing up, thereby avoiding changes in the welding position and cutting length, which is conducive to achieving the same length of all cut lead wires.

[0023] The present invention is further configured such that the wire feeding mechanism includes a wire feeding motor, a wire feeding wheel rotatably mounted on the wire feeding motor, a guide wheel plate mounted on the side of the wire feeding wheel, a straightening plate slidably mounted on the guide wheel plate vertically, a straightening wheel mounted on the straightening plate, a plurality of circular pulleys mounted on the upper end of the guide wheel plate, and a guide wheel mounted at the beginning of the wire transmission track. The lead wire pulled out by the wire feeding wheel is sequentially wound around the straightening wheel, the circular pulleys, and the guide wheel.

[0024] By adopting the above technical solution, after the lead wire is led out, it is straightened and guided by straightening wheel, circular belt wheel and guide wheel, and finally the straightened lead wire is introduced into the lead wire groove of the lead wire transmission track to ensure its welding and fixed length cutting effect, which helps to improve product quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a first-view structural diagram of the fixed-length mechanism of this utility model;

[0027] Figure 3 This is a second-view structural diagram of the fixed-length mechanism of this utility model;

[0028] Figure 4 This is a schematic diagram of the cutting mechanism of this utility model;

[0029] Figure 5 This is a partially enlarged structural diagram of the cutting mechanism of this utility model after the lower blade has been removed;

[0030] Figure 6 This is a schematic diagram of the wire bonding mechanism of this utility model;

[0031] Figure 7This is a schematic diagram showing the distribution structure of the four welding heads in the wire bonding mechanism of this utility model;

[0032] Figure 8 This is a partial cross-sectional view of the wire bonding mechanism of this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the stop assembly and the preload assembly of this utility model;

[0034] Figure 10 This is a schematic diagram of the wire feeding mechanism of this utility model.

[0035] In the diagram: 1. Lead wire transmission track; 2. Wire feeding mechanism; 3. Wire bonding mechanism; 4. Cutting mechanism; 5. Lead wire groove; 6. Length fixing mechanism; 7. Length fixing base; 8. Length fixing slide cylinder; 9. Finger cylinder; 10. Base plate; 11. Vertical plate; 12. Adjusting plate; 13. Positioning seat; 14. Adjusting screw; 15. Transmission nut; 16. Limiting protrusion; 17. Positioning part; 18. Limiting part; 19. Positioning groove; 20. Limiting groove; 21. Cutting... 21. Cutting bracket; 22. Blade holder; 23. Lower blade; 24. Upper blade; 25. Cutting cylinder; 26. Movable plate; 27. Guide rail; 28. Slider; 29. ​​Movable groove; 30. Floating block; 31. T-shaped guide block; 32. T-shaped guide groove; 33. Floating spring; 34. Floating groove; 35. Cutting pressure block; 36. Welding base; 37. Lower electrode plate; 38. Lower welding head; 39. Movable base; 40. Upper electrode plate; 41. Upper welding head; 42. 43. Column; 44. Linear bearing; 45. Cylinder plate; 46. Welding cylinder; 47. First welding head seat; 48. Second welding head seat; 49. First guide groove; 50. Second guide groove; 51. Welding head top plate; 52. Push screw; 53. First return spring; 54. First welding head slide; 55. First small welding head; 56. Push inclined surface; 57. Limiting flange; 58. Second return spring; 59. Third guide groove; 50. Second welding head slide; 60. Second small welding head; 61. Limiting plate; 62. Third return spring; 63. Stop assembly; 64. Stop seat; 65. Stop cylinder; 66. Wire clamping block; 67. Pre-compression assembly; 68. Pre-compression mounting block; 69. Pre-compression block; 70. Pre-compression tension spring; 71. Wire feeding motor; 72. Wire feeding wheel; 73. Guide wheel plate; 74. Straightening plate; 75. Straightening wheel; 76. Round pulley; 77. Guide wheel; 78. Slide groove; 79. Welded joint. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example: As attached Figures 1-10 The circuit breaker lead wire length cutting device shown includes a lead wire transmission track 1, a lead wire feeding mechanism 2 arranged sequentially along the extension direction of the lead wire transmission track 1, a wire bonding mechanism 3 for bonding wire knots at equal intervals on the lead wire, and a cutting mechanism 4 for cutting the wire bonding portion of the lead wire. The lead wire transmission track 1 is provided with a lead wire groove 5 for lead wire positioning. A length-fixing mechanism 6 is also provided in front of the lead wire transmission track 1 for pulling the lead wire out of the lead wire transmission track 1 by a set length for the cutting mechanism 4 to perform length-fixed cutting. The length-fixing mechanism 6 includes a length-fixing base 7, a length-fixing slide cylinder 8 disposed on the length-fixing base 7, and a finger cylinder 9 disposed on the movable end of the length-fixing slide cylinder 8 for clamping the end of the lead wire. The length-fixing slide cylinder 8 drives the finger cylinder 9 to move toward or away from the lead wire transmission track 1. During lead wire transmission, the wire bonding mechanism 3 welds multiple wire knots at equal intervals on the lead wire. The lead wire of a set length is pulled out by the length-fixing mechanism 6, and then the cutting mechanism 4 cuts the first section of the lead wire according to the position of the wire knot. After removing the section of the lead wire, the above steps are repeated. This replaces manual cutting of the lead wire to a fixed length and end welding connection, which is not only more efficient, but also greatly improves the product qualification rate.

[0038] As attached Figure 2 and attached Figure 3 As shown, the fixed-length base 7 includes a base plate 10, two upright plates 11 disposed on the base plate 10, and an adjusting plate 12 slidably disposed on the two upright plates 11 in a direction that can move closer to or away from the lead wire transmission track 1. The bottom of the adjusting plate 12 is provided with two sliding grooves 78 for the top of the upright plates 11 to extend into. A positioning seat 13 is provided between the two upright plates 11. An adjusting screw 14 is rotatably mounted on the positioning seat 13, that is, the positioning seat 13 has a circular hole for the adjusting screw 14 to pass through, and the adjusting screw 14 is respectively engaged with retaining springs on both sides of the positioning seat 13 to axially limit the adjusting screw 14. The bottom of the adjusting plate 12 is provided with a transmission nut 15 that forms a threaded engagement with the adjusting screw 14. By rotating the adjusting screw 14, the adjusting plate 12 can be moved to achieve fine adjustment of the length of a single lead wire after cutting, so as to adapt it to products of different specifications.

[0039] As attached Figure 2 and attached Figure 3As shown, the fixed-length base 7 also includes two limiting protrusions 16. Each limiting protrusion 16 includes a positioning part 17 with a rectangular bottom cross-section and a limiting part 18 with a dovetail-shaped positioning cross-section, which are integrally formed. The upper end of the upright plate 11 is provided with a positioning groove 19, and the positioning part 17 is fixed in the positioning groove 19 by fasteners (screws). The adjusting plate 12 is provided with a limiting groove 20 corresponding to the upper end of the sliding groove 78, which cooperates with the limiting part 18. This design can vertically limit the adjusting plate 12, so that it can only move along the extension direction of the limiting protrusions 16, which greatly improves the stability of the position adjustment of the adjusting plate 12.

[0040] As attached Figure 4 and attached Figure 5 As shown, the cutting mechanism 4 includes a cutting bracket 21, a blade holder 22 located at the end of the lead wire transmission track 1 corresponding to the cutting bracket 21, a lower blade 23 mounted on the blade holder 22, an upper blade 24 movably mounted above the lower blade 23, a cutting cylinder 25 mounted on the cutting bracket 21, and a movable plate 26 connected to the movable end of the cutting cylinder 25. The upper blade 24 is mounted on the movable plate 26. A guide rail 27 is also vertically mounted on the cutting bracket 21, and a slider 28 that cooperates with the guide rail 27 is provided on the movable plate 26. The upper blade 24 is moved closer to the lower blade 23 by the cutting cylinder 25 to cut the lead wire. The structure is simple and the cutting action is highly efficient.

[0041] As attached Figure 4 and attached Figure 5 As shown, the blade holder 22 is provided with a movable groove 29, and a floating block 30 is provided in the movable groove 29. The lower blade 23 is installed in front of the blade holder 22 corresponding to the movable groove 29 to limit the floating block 30. The blade holder 22 is provided with a T-shaped guide block 31 at the inner end of the movable groove 29. The lower end of the T-shaped guide block 31 is provided with a T-shaped guide groove 32 that cooperates with the T-shaped guide block 31. When the floating block 30 moves vertically, the T-shaped guide groove 32 can be vertically displaced relative to the T-shaped guide block 31. A floating spring 33 is provided between the floating block 30 and the blade holder 22 to apply an upward force to the floating block 30. The floating block 30 is provided with a floating groove 34 and a cutting pressure block 35 for confining the lead wire in the floating groove 34. The floating groove 34 is connected to the lead wire groove 5. The cutting pressure block 35 is connected to the floating block 30 by screws. The part of the cutting pressure block 35 that extends into the floating groove 34 is provided with an inner groove for the lead wire to pass through. During the downward movement of the upper blade 24 to cut the lead wire, it comes into contact with the floating block 30 and pushes the floating block 30 downward. The floating block 30 not only makes way for the upper blade 24 so that it can continue to move downward and cooperate with the lower blade 23 to cut the lead wire, but also supports and positions the lead wire, thereby ensuring a good cutting effect.

[0042] As attached Figure 1 , 6 As shown in Figures 7 and 8, the wire bonding mechanism 3 includes a welding base 36 disposed below the lead wire transmission track 1, a lower electrode plate 37 disposed on the welding base 36, a lower welding head 38 disposed on the lower electrode plate 37, a movable seat 39 disposed above the lead wire transmission track 1, an upper electrode plate 40 disposed at the bottom of the movable seat 39, and an upper welding head 41 disposed on the upper electrode plate 40. The welding base 36 is also provided with two columns 42. The movable seat 39 is provided with two linear bearings 43 respectively sleeved on the outer periphery of the corresponding columns 42. The upper ends of the two columns 42 are also provided with cylinder plates 44. A welding cylinder 45 is installed on the cylinder plates 44. The movable end of the welding cylinder 45 is connected to the movable seat 39 to drive the movable seat 39 to move vertically. The middle part of the lead wire transmission track 1 is provided with a welding cut 79 for the lower end of the upper welding head 41 and the upper end of the lower welding head 38 to extend into. The welding cylinder 45 drives the upper welding head 41 to move towards the lower welding head 38 to perform the wire bonding process, which is highly efficient.

[0043] As attached Figures 6-8As shown, the welding wire bonding mechanism 3 further includes a first welding head seat 46 and a second welding head seat 47 respectively disposed on the left and right sides of the lower electrode plate 37; the upper end of the first welding head seat 46 is provided with a first guide groove 48 and a second guide groove 49 extending toward the welding fracture 79 and communicating with the first guide groove 48; a welding head top plate 50 is slidably disposed on the first guide groove 48 along the vertical direction; the lower end of the movable seat 39 is connected to a push screw 51 for pushing the welding head top plate 50 downward when moving downward; a first return spring 52 for applying an upward force to the welding head top plate 50 is disposed at the inner end of the first guide groove 48; a first welding head slide 53 is slidably disposed in the second guide groove 49; a first small welding head 54 is horizontally mounted on the first welding head slide 53; the side of the welding head top plate 50 is provided with a push inclined surface 55 for pushing the first welding head slide 53 toward the direction close to the welding fracture 79 when moving downward; the bottom of the welding head top plate 50 is provided with a first welding head slide 53 for moving upward when moving upward. The lower ends of the first welding head 46 abut against each other to form a limiting flange 56 that limits the upper stroke. A second return spring 57 is also installed on the first welding head seat 46 to apply a force to the first welding head slide 53 in a direction away from the weld fracture 79. A third guide groove 58 is vertically formed on the upper edge of the second welding head seat 47. A second welding head slide 59 is slidably mounted on the upper edge of the third guide groove 58. A second small welding head 60 is horizontally mounted on the upper edge of the second welding head slide 59. The second small welding head 60 and the lower welding head 38 are positioned to the right of each other. The second welding head seat 47 is provided with a limiting plate 61 at its upper end to limit the upper stroke of the second welding head slide 59. A third return spring 62 is installed on the second welding head seat 47 at a position below the second welding head slide 59 to apply an upward force to the second welding head slide 59. When the upper welding head 41 moves downward and abuts against the upper end of the second small welding head 60, the right end of the first small welding head 54 abuts against the left side of the upper welding head 41, and the lower side of the first small welding head 54 abuts against the upper end of the lower welding head 38. During the wire bonding process, the upper welding head 41 and the lower welding head 38 work together to apply a vertical compressive force to the lead wire, while the first small welding head 54 and the second small welding head 60 work together to apply a horizontal compressive force to the lead wire. This creates four positive pressures on the lead wire, pressing it tightly from all sides. In other words, the side corners of the four welding heads are pressed against the four directions of the lead wire. This part is heated and welded into a wire knot with a rectangular cross-section. The weld is not only very strong, but the surface of the wire knot is also smooth and flat, which is conducive to subsequent assembly.

[0044] As attached Figure 9As shown, a set of stop components 63 are respectively provided on the lead wire transport track 1 at the rear positions corresponding to the wire bonding mechanism 3 and the cutting mechanism 4. The stop component 63 includes a stop seat 64, a stop cylinder 65 installed on the stop seat 64, and a wire clamping block 66 installed on the movable end of the stop cylinder 65. The stop cylinder 65 drives the wire clamping block 66 to extend downward into or upward out of the lead wire groove 5. By setting the stop component 63, the transport of the lead wire can be paused in advance before the welding and cutting processes, thereby ensuring the stable operation of the welding and cutting actions.

[0045] As attached Figure 9 As shown, the lead wire transmission track 1 is also equipped with multiple sets of pre-compression components 67. Each pre-compression component 67 includes a pre-compression mounting block 68, a pre-compression block 69, and a pre-compression tension spring 70. The pre-compression mounting block 68 is disposed on the lead wire transmission track 1. The upper end of the pre-compression block 69 is rotatably mounted on the pre-compression mounting block 68. One end of the pre-compression tension spring 70 is fixed to the pre-compression mounting block 68, and the other end of the pre-compression tension spring 70 overlaps with the lower end of the pre-compression block 69, causing the pre-compression block 69 to press the lead wire tightly within the lead wire groove 5. The lower end of the pre-compression block 69 is inclined towards the lead wire transmission direction. The pre-compression block 69 of the pre-compression component 67 can stably confine the lead wire within the groove of the lead wire transmission track 1 under the action of the tension spring, improving its transportation stability. Simultaneously, the pre-compression block 69 can also prevent the lead wire from regressing, thereby avoiding changes in the welding position and cutting length, and facilitating the achievement of uniform length for all cut lead wires.

[0046] As attached Figure 10 As shown, the wire feeding mechanism 2 includes a wire feeding motor 71, a wire feeding wheel 72 rotatably mounted on the wire feeding motor 71, a guide wheel plate 73 mounted on the side of the wire feeding wheel 72, a straightening plate 74 (which can be a combination of a sliding block and a slide rail) slidably mounted on the guide wheel plate 73, a straightening wheel 75 mounted on the straightening plate 74, multiple round pulleys 76 mounted on the upper end of the guide wheel plate 73, and a guide wheel 77 mounted at the beginning of the wire transmission track 1. The wire feeding motor 71 drives the wire feeding wheel 72 to rotate and feed the wire. The wire pulled out by the wire feeding wheel 72 is sequentially wound around the straightening wheel 75, the round pulleys 76, and the guide wheel 77. After the wire is drawn out, it is straightened and guided by the straightening wheel 75, the round pulleys 76, and the guide wheel 77, and finally the straightened wire is introduced into the wire groove 5 of the wire transmission track 1 to ensure its welding and fixed-length cutting effect, which helps to improve product quality.

Claims

1. A circuit breaker lead wire fixed-length cutting device, characterized in that: The device includes a lead wire transmission track (1), a lead wire feeding mechanism (2) arranged sequentially along the extension direction of the lead wire transmission track (1), a wire bonding mechanism (3) for bonding wire knots at equal intervals on the lead wire, and a cutting mechanism (4) for cutting the wire bonding parts of the lead wire. The lead wire transmission track (1) is provided with a lead wire groove (5) for positioning the lead wire. The lead wire transmission track (1) is also provided with a length-fixing mechanism (6) in front of it for pulling the lead wire out of the lead wire transmission track (1) by a set length for the cutting mechanism (4) to perform length-fixed cutting. The length-fixing mechanism (6) includes a length-fixing base (7), a length-fixing slide cylinder (8) arranged on the length-fixing base (7), and a finger cylinder (9) arranged on the movable end of the length-fixing slide cylinder (8) for clamping the end of the lead wire. The length-fixing slide cylinder (8) drives the finger cylinder (9) to move toward or away from the lead wire transmission track (1).

2. The circuit breaker lead wire fixed-length cutting device according to claim 1, characterized in that: The fixed-length base (7) includes a base plate (10), two upright plates (11) disposed on the base plate (10), and an adjustment plate (12) that can be slidably disposed on the two upright plates (11) in the direction of approaching or moving away from the lead wire transmission track (1). The bottom of the adjustment plate (12) is provided with two sliding grooves (78) for the top of the upright plates (11) to extend into. A positioning seat (13) is provided between the two upright plates (11). An adjustment screw (14) is rotatably mounted on the positioning seat (13), and a retaining spring is respectively engaged with the adjustment screw (14) on both sides of the positioning seat (13). The bottom of the adjustment plate (12) is provided with a transmission nut (15) that forms a threaded engagement with the adjustment screw (14).

3. The circuit breaker lead wire fixed-length cutting device according to claim 2, characterized in that: The fixed-length base (7) also includes two limiting protrusions (16). The limiting protrusions (16) include a positioning part (17) with a rectangular bottom cross section and a limiting part (18) with a dovetail-shaped positioning cross section. The upper end of the upright plate (11) is provided with a positioning groove (19). The positioning part (17) is fixed in the positioning groove (19) by fasteners. The adjusting plate (12) is provided with a limiting groove (20) corresponding to the upper end of the sliding groove (78) and cooperating with the limiting part (18).

4. The circuit breaker lead wire fixed-length cutting device according to claim 1, characterized in that: The cutting mechanism (4) includes a cutting bracket (21), a blade holder (22) located at the end of the lead wire transmission track (1) of the cutting bracket (21), a lower blade (23) located on the blade holder (22), an upper blade (24) movably located above the lower blade (23), a cutting cylinder (25) located on the cutting bracket (21), and a movable plate (26) connected to the movable end of the cutting cylinder (25). The upper blade (24) is mounted on the movable plate (26). A guide rail (27) is also mounted vertically on the cutting bracket (21). A slider (28) that cooperates with the guide rail (27) is provided on the movable plate (26).

5. A circuit breaker lead wire length cutting device according to claim 4, characterized in that: The blade holder (22) is provided with a movable groove (29), and a floating block (30) is provided in the movable groove (29). The lower blade (23) is installed in front of the movable groove (29) of the blade holder (22) to limit the floating block (30). A T-shaped guide block (31) is provided at the inner end of the movable groove (29) of the blade holder (22). A T-shaped guide groove (32) is provided at the lower end of the T-shaped guide block (31) to cooperate with the T-shaped guide block (31). When the floating block (30) moves vertically, the T-shaped guide groove (32) can be vertically displaced relative to the T-shaped guide block (31). A floating spring (33) is provided between the floating block (30) and the blade holder (22) to apply an upward force to the floating block (30). A floating groove (34) and a cutting pressure block (35) for confining the lead wire in the floating groove (34) are provided on the floating block (30).

6. The circuit breaker lead wire fixed-length cutting device according to claim 1, characterized in that: The wire bonding mechanism (3) includes a welding base (36) disposed below the lead wire transmission track (1), a lower electrode plate (37) disposed on the welding base (36), a lower welding head (38) disposed on the lower electrode plate (37), a movable seat (39) disposed above the lead wire transmission track (1), an upper electrode plate (40) disposed at the bottom of the movable seat (39), and an upper welding head (41) disposed on the upper electrode plate (40). The welding base (36) is also provided with two columns (42). The movable seat (39) is provided with two linear bearings (43) respectively sleeved on the outer periphery of the corresponding column (42). The upper end of the two columns (42) is also provided with a cylinder plate (44). A welding cylinder (45) is installed on the cylinder plate (44). The movable end of the welding cylinder (45) is connected to the movable seat (39) to drive the movable seat (39) to move vertically. The middle part of the lead wire transmission track (1) is provided with a welding cut (79) for the lower end of the upper welding head (41) and the upper end of the lower welding head (38) to extend into.

7. A circuit breaker lead wire fixed-length cutting device according to claim 6, characterized in that: The wire bonding mechanism (3) further includes a first welding head seat (46) and a second welding head seat (47) respectively disposed on the left and right sides of the lower electrode plate (37); the upper end of the first welding head seat (46) is provided with a first guide groove (48) along the vertical direction and a second guide groove (49) extending toward the welding fracture (79) and communicating with the first guide groove (48); a welding head top plate (50) is slidably disposed on the first guide groove (48) along the vertical direction; the lower end of the movable seat (39) is connected to a push screw (51) for pushing the welding head top plate (50) downward when moving downward. The first guide groove (48) is provided with a first return spring (52) at its inner end for applying an upward force to the welding head top plate (50). The second guide groove (49) is provided with a first welding head slide (53) slidably disposed therein. A first small welding head (54) is installed on the first welding head slide (53) along the transverse direction. The welding head top plate (50) is provided with a pushing inclined surface (55) on its side for pushing the first welding head slide (53) toward the direction close to the welding fracture (79) when moving downward. The bottom of the welding head top plate (50) is provided with a surface for moving upward with the first welding head slide (53). The lower ends abut against each other to form a limiting flange (56) that limits the upper stroke. A second return spring (57) is also installed on the first welding head seat (46) to apply a force to the first welding head slide (53) in a direction away from the weld fracture (79). A third guide groove (58) is vertically opened on the upper edge of the second welding head seat (47). A second welding head slide (59) is slidably arranged on the upper edge of the third guide groove (58). A second small welding head (60) is horizontally installed on the upper edge of the second welding head slide (59). The second small welding head (60) is on the right side of the lower welding head (38). The upper end of the second welding head seat (47) is provided with a limiting plate (61) for limiting the upper stroke of the second welding head slide (59). The second welding head seat (47) is provided with a third return spring (62) for applying an upward force to the second welding head slide (59) at the position below the second welding head slide (59). When the upper welding head (41) moves downward and abuts against the upper end of the second small welding head (60), the right end of the first small welding head (54) abuts against the left side of the upper welding head (41), and the lower side of the first small welding head (54) abuts against the upper end of the lower welding head (38).

8. A circuit breaker lead wire fixed-length cutting device according to claim 1, characterized in that: A set of stop components (63) is provided on the lead wire transmission track (1) at the position corresponding to the rear side of the wire bonding mechanism (3) and the cutting mechanism (4). The stop component (63) includes a stop seat (64), a stop cylinder (65) installed on the stop seat (64), and a wire clamping block (66) installed on the movable end of the stop cylinder (65). The stop cylinder (65) drives the wire clamping block (66) to extend downward into or upward out of the lead wire groove (5).

9. A circuit breaker lead wire fixed-length cutting device according to claim 1, characterized in that: The lead wire transmission track (1) is also provided with multiple sets of pre-compression components (67). The pre-compression components (67) include a pre-compression mounting block (68), a pre-compression block (69), and a pre-compression tension spring (70). The pre-compression mounting block (68) is set on the lead wire transmission track (1). The upper end of the pre-compression block (69) is rotatably set on the pre-compression mounting block (68). One end of the pre-compression tension spring (70) is fixed on the pre-compression mounting block (68). The other end of the pre-compression tension spring (70) overlaps with the lower end of the pre-compression block (69), causing the pre-compression block (69) to press the lead wire tightly in the lead wire groove (5). The lower end of the pre-compression block (69) is inclined towards the lead wire transmission direction.

10. A circuit breaker lead wire fixed-length cutting device according to claim 1, characterized in that: The wire feeding mechanism (2) includes a wire feeding motor (71), a wire feeding wheel (72) rotatably mounted on the wire feeding motor (71), a guide wheel plate (73) mounted on the side of the wire feeding wheel (72), a straightening plate (74) slidably mounted on the guide wheel plate (73) in a vertical direction, a straightening wheel (75) mounted on the straightening plate (74), a plurality of round pulleys (76) mounted on the upper end of the guide wheel plate (73), and a guide wheel (77) mounted at the beginning of the wire transmission track (1). The lead wire pulled out by the wire feeding wheel (72) is wound around the straightening wheel (75), the round pulley (76), and the guide wheel (77) in sequence.

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