Electronic component pin fixed-length shearing device

Abstract

The invention discloses an electronic component pin fixed-length shearing device, and relates to the technical field of electronic component machining, the electronic component pin fixed-length shearing device comprises a shell, a top cover is slidably connected to the top of the shell, a first telescopic rod with the telescopic end fixed to the top cover is installed in the shell, two cutters are arranged in the shell, and the electronic component pin fixed-length shearing device further comprises a limiting driving mechanism and a deflection mechanism; the limiting driving mechanism comprises a second telescopic rod fixedly mounted in the shell, a mounting frame fixed to the telescopic end of the second telescopic rod is slidably connected into the shell, and a second gear and a first gear are rotationally connected into the shell and the mounting frame correspondingly. The two cutters can be attached to the two sides of the pin through the limiting driving mechanism before the pin is sheared, the situation that the connecting position of the pin and the electronic component is bent, fatigued and even fractured due to the fact that the pin is pushed by the cutters in the shearing process is avoided, the risk that the pin is fatigued and fractured in the shearing process is reduced, and the pin shearing efficiency is improved. And the shearing effect of non-centered pins and inclined pins is improved.

Description

Technical Field

[0001] This invention relates to the field of electronic component processing technology, and in particular to a device for cutting the pins of electronic components to a fixed length. Background Technology

[0002] Electronic component pins are slender metal terminals made of conductive metal that extend from the component body (such as resistors, capacitors, integrated circuits, connectors, etc.). They are the key interfaces for electrical connection and mechanical fixation with external circuits. When components are manufactured, their pin lengths are often designed to be relatively long to adapt to different application scenarios and facilitate subsequent processing. Before they are installed on printed circuit boards, the pins must be cut to a precise standard length that meets the design requirements.

[0003] Manually cutting leads with pliers makes it difficult to control the length of the cut leads. Fixing the leads before cutting with a cutter also presents significant problems. On one hand, the leads of some electronic components are not centered at the bottom. During cutting, one side of the cutter will contact the lead first and push it until the two cutters come together to cut the lead. During this process, the lead is tilted by the cutter, causing bending stress at the connection between the lead and the electronic component, which can easily lead to lead fatigue or even breakage. On the other hand, some electronic components are designed with tilted leads for easy insertion and removal. These leads are more likely to be pushed during cutting, further increasing the stress on the lead and raising the risk of lead fatigue and breakage during the cutting process. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that when existing shearing devices cut off non-centered or tilted leads, the cutter pushes the lead, causing the lead to bend, fatigue, or even break at the connection point with the electronic component. Therefore, this invention proposes a fixed-length shearing device for electronic component leads.

[0005] To achieve the above objectives, the present invention employs the following technology: a fixed-length cutting device for electronic component leads, comprising a housing, a top cover slidably connected to the top of the housing, a telescopic rod with a telescopic end fixed to the top cover installed inside the housing, two cutting tools disposed inside the housing, and further comprising: The limit drive mechanism and the deflection mechanism include a telescopic rod two fixedly installed inside the housing, a mounting bracket fixed to the telescopic end of the telescopic rod two slidably connected inside the housing, a gear two and a gear one rotatably connected inside the housing and the mounting bracket respectively, a push rod two meshing with the top of the gear two slidably connected inside the housing, a push rod one and a rack meshing with the top and bottom of the gear one respectively slidably connected inside the mounting bracket, and a friction assembly provided inside the mounting bracket; The friction assembly adjusts the rotational resistance of gear one, causing the limit drive mechanism to drive the two cutters to contact both sides of the pin, and then the pin is cut off by synchronously pushing the two cutters.

[0006] As a further description of the above technical solution: the friction assembly includes a friction plate fixed to one side of the gear, and a friction block is slidably connected inside the mounting bracket.

[0007] As a further description of the above technical solution: an electromagnet is fixedly installed inside the mounting bracket, a magnetic block is fixed inside the friction block, and a tension spring is fixed between the friction block and the inner wall of the mounting bracket.

[0008] As a further description of the above technical solution: the deflection mechanism includes two frames located in the same plane, and the two cutting tools are slidably connected inside the two frames respectively.

[0009] As a further description of the above technical solution: the deflection mechanism also includes a frame that is rotatably connected to the inside of the housing and fixed to the two frames, a motor is fixedly installed inside the housing, and a transmission unit is provided between the motor and the frame.

[0010] As a further description of the above technical solution: the transmission unit includes a worm fixed to the motor drive shaft and a worm wheel fixed to one end of the frame, and the worm and the worm wheel mesh with each other.

[0011] As a further description of the above technical solution: iron frames are fixed on the opposite sides of the two cutting tools, and a magnetic sheet that is attracted to the iron frame is fixed at one end of the push rod.

[0012] As a further description of the above technical solution: the top cover has two symmetrical clamping plates internally elastically connected, and one side of the clamping plate is set as an inclined surface.

[0013] In summary, due to the adoption of the above-mentioned technology in the electronic component pin length cutting device, the beneficial effects of this invention are: 1. This application uses a limit drive mechanism to ensure that two cutters are positioned on both sides of the pin before pin shearing, preventing the pin from being pushed by the cutters during shearing, which could cause bending fatigue or even breakage at the connection between the pin and the electronic component. This reduces the risk of pin fatigue breakage during shearing and improves the shearing effect for off-center and tilted pins. Furthermore, it can drive the two cutters to shear the pin synchronously, with both cutters applying symmetrical shearing forces to the pin simultaneously, avoiding local deformation caused by unilateral compression. This results in a smoother and flatter edge at the pin shearing cut, effectively reducing the generation of burrs and metal debris.

[0014] 2. Since the limit drive mechanism can adjust the position of the two cutters according to the pin position, there is no need to precisely position the pin when cutting the pin. This design facilitates the placement and removal of electronic components during cutting, thereby speeding up the cutting efficiency of electronic component pins.

[0015] 3. This application adjusts the angle of the cutter through a deflection mechanism, so that the cutter is perpendicular to the pin for cutting. This design makes the cutting plane strictly perpendicular to the pin axis, which not only facilitates the control of the length of the pin after cutting, but also ensures that the pin end shape is regular, providing a stable structural foundation for subsequent processes. In addition, when the cutter cuts the pin perpendicularly, the cutting force is applied entirely along the radial direction of the pin, and the stress distribution is uniform. The pin only bears the pure cutting force at the moment of cutting, without additional lateral stress, which can minimize local deformation and ensure the integrity of the cutting edge. Attached Figure Description

[0016] Figure 1 An overall schematic diagram provided according to an embodiment of the present invention is shown; Figure 2 An overall exploded view provided according to an embodiment of the present invention is shown; Figure 3 A cross-sectional view of the housing provided according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of a limit drive mechanism provided according to an embodiment of the present invention is shown; Figure 5 A cross-sectional view of a mounting bracket provided according to an embodiment of the present invention is shown; Figure 6 The present invention provides an embodiment of the invention. Figure 5 Enlarged view of point A in the middle; Figure 7 A longitudinal cross-sectional view of the housing provided according to an embodiment of the present invention is shown; Figure 8 A first state diagram provided according to an embodiment of the present invention is shown; Figure 9 A second state diagram provided according to an embodiment of the present invention is shown.

[0017] Legend: 10. Shell; 11. Top cover; 12. Clamping plate; 13. Telescopic rod one; 14. Cutting tool; 20. Limit drive mechanism; 21. Telescopic rod II; 22. Mounting bracket; 23. Push rod I; 24. Gear I; 25. Rack; 26. Gear II; 27. Push rod II; 28. Magnetic sheet; 29. ​​Friction assembly; 291. Friction plate; 292. Friction block; 293. Electromagnet; 294. Tension spring; 295. Magnetic block; 30. Deflection mechanism; 31. Frame; 32. Motor; 33. Transmission unit; 331. Worm; 332. Worm wheel; 34. Frame; 35. Iron frame. Detailed Implementation

[0018] The following will describe, with reference to the accompanying drawings of the embodiments of the present invention, a pin-length cutting device for electronic components according to the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1-9 As shown, the present invention provides an electronic component pin length cutting device: including a housing 10, a top cover 11 slidably connected to the top of the housing 10, an opening for the pin to enter on one side of the housing 10 and the top cover 11, the opening width being between 2cm and 4cm, a telescopic rod 13 with its telescopic end fixed to the top cover 11 installed inside the housing 10, two symmetrically arranged blades 14 arranged inside the housing 10, and a collection box for storing waste material slidably connected to the bottom of the housing 10. When cutting the pins, align the pins of the electronic component with the opening, then make the bottom surface of the electronic component contact the top cover 11, and push the electronic component to move it above the top cover 11. At this time, the pins of the electronic component enter the interior of the housing 10 through the opening for cutting. Reference Figure 2 The telescopic rod 13 extends and retracts, causing the top cover 11 to rise or fall, which in turn raises and lowers the electronic components to adjust the relative position of the cutter 14 and the pin, thereby achieving fixed-length cutting of the pin.

[0020] Inside the top cover 11, there are two symmetrical clamping plates 12 connected by springs. One side of the clamping plate 12 is set as an inclined surface. When the electronic components are pushed, they are pressed against the inclined surface of the clamping plate 12, pushing the two clamping plates 12 to both sides and entering between the two clamping plates 12. At this time, the spring is compressed, and the pin enters the inside of the housing 10. The clamping plates 12 hold the electronic components under the action of the spring force to prevent the pins from moving when they are cut.

[0021] Reference Figure 3 and Figure 4In order to enable the two cutters 14 to cut the pin synchronously and avoid one of the cutters 14 from contacting the pin first and pushing the pin, a limit drive mechanism 20 is provided inside the housing 10. The limit drive mechanism 20 includes a telescopic rod 21 fixedly installed inside the housing 10. A mounting bracket 22 is slidably connected inside the housing 10 and fixed to the telescopic end of the telescopic rod 21. Gear 26 and gear 24 are rotatably connected inside the housing 10 and the mounting bracket 22, respectively. A push rod 27 meshing with the top of gear 26 is slidably connected inside the housing 10. A push rod 23 and a rack 25 meshing with the top and bottom of gear 24, respectively, are slidably connected inside the mounting bracket 22. One end of the push rod 23 contacts the inner wall of the housing 10. Gear 26 is the same model as gear 124 and is located on the same horizontal line. To ensure the force balance of the tool 14, push rod 123, gear 124, rack 25, gear 26 and push rod 27 are all provided in two and arranged symmetrically.

[0022] When cutting the pin, the control telescopic rod 21 extends and pushes the mounting bracket 22. The mounting bracket 22 drives the push rod 23, gear 24, and rack 25 to move. The push rod 23 pushes the cutter 14 until it contacts the pin. At this point, the push rod 23 and the cutter 14 are blocked by the pin and cannot move further. Therefore, while the mounting bracket 22 continues to move, driving the gear 24 and rack 25 to move, the gear 24 rolls on the push rod 23, causing the rack 25 to move relative to the mounting bracket 22 towards the gear 26. When the rack 25 moves to the bottom of the gear 26... After the rack 25 meshes with gear 26, it continues to move, driving gear 26 to rotate. Gear 26 then drives push rod 27 to move in the direction of cutter 14 until push rod 27 pushes another cutter 14 to contact the pin. At this point, both cutters 14 are in contact with both sides of the pin. Then, the pin is cut by the two cutters 14. This design can prevent one cutter 14 from contacting the pin first and pushing it when cutting the pin, thus preventing the pin from bending at the connection point with the electronic component under the pushing force and reducing the risk of pin fatigue fracture.

[0023] It is worth mentioning that the design of the two cutters 14 contacting the two sides of the pin respectively before cutting the pin by the limit drive mechanism 20 can eliminate the need for precise positioning of the pin during pin cutting, thereby facilitating the fixing and handling of electronic components, simplifying the pin cutting process, improving cutting efficiency, and this design also helps to cut the pins of some electronic components with pins that are not centered or are tilted, thus expanding the scope of application.

[0024] Reference Figure 4 , Figure 5 and Figure 6In order to use the limit drive mechanism 20 to directly push the cutter 14 to cut the pin and simplify the device structure, the mounting frame 22 is provided with a friction assembly 29 for locking the gear 24. The friction assembly 29 includes a friction plate 291 fixed to one side of the gear 24, a friction block 292 slidably connected inside the mounting frame 22, an electromagnet 293 fixedly installed inside the mounting frame 22, a magnet 295 fixedly installed inside the friction block 292, and a tension spring 294 fixed between the friction block 292 and the inner wall of the mounting frame 22. When the electromagnet 293 is activated, it generates a magnetic repulsive force to push the magnetic block 295. When the friction block 292 comes into contact with the friction plate 291, the friction between the friction block 292 and the friction plate 291 restricts the rotation of the gear 24. By controlling the magnitude of the magnetic force generated by the electromagnet 293, the magnitude of the friction between the friction block 292 and the friction plate 291 can be adjusted. Under the action of the friction, the resistance encountered by the push rod 23 when pushing the cutter 14 is insufficient to cause the push rod 23 to slide relative to the mounting bracket 22. By increasing the magnetic force of electromagnet 293, the friction between friction block 292 and friction plate 291 is increased, and gear 24 can be locked by friction. At this time, push rod 23 and rack 25 are locked by gear 24. Continue to control the extension rod 21 to extend and drive the mounting frame 22 to move. The mounting frame 22 drives gear 24 to push push rod 23 to push cutter 14, while driving rack 25 to move and causing gear 26 to rotate and drive push rod 27 to push another cutter 14. The two cutters 14 move synchronously to cut the pin. During this process, the distance that rack 25 moves is the same as that of push rod 23. Under the transmission of gear 26, the distance that rack 25 moves is the same as that of push rod 27. Therefore, push rod 23 and push rod 27 move in the same direction to make the two cutters 14 move synchronously to cut the pin. The two cutters 14 apply symmetrical cutting force to the pin at the same time, avoiding local deformation caused by unilateral compression. This makes the edge of the pin cut smoother and flatter, effectively reducing the generation of burrs and metal chips.

[0025] A transparent window is provided on the top cover 11 to observe the position of the cutter 14 and the pin, so as to control the timing of the friction assembly 29 locking the gear 24.

[0026] Reference Figure 7 and Figure 8 In order to make the cut flat when shearing the tilted pin, to facilitate precise control of the length of the pin after shearing and to reduce burrs, a deflection mechanism 30 is also provided inside the housing 10. The deflection mechanism 30 includes a frame 31 rotatably connected inside the housing 10. Two frames 34 located in the same plane are fixed inside the frame 31. Two cutters 14 are slidably connected inside the two frames 34 respectively. A motor 32 is fixedly installed inside the housing 10.

[0027] The motor 32 drives the frame 31 to rotate, causing the frame 34 to deflect. The angle of the cutter 14 inside the two frames 34 is adjusted so that the two cutters 14 are perpendicular to the pin when cutting the pin, thereby ensuring that the cutting edge of the pin is flush.

[0028] A transmission unit 33 is provided between the motor 32 and the frame 31. The transmission unit 33 includes a worm 331 fixed to the drive shaft of the motor 32 and a worm wheel 332 fixed to one end of the frame 31. The worm 331 and the worm wheel 332 mesh with each other. When the motor 32 is started, it drives the worm 331 to rotate. The worm 331 drives the worm wheel 332 to rotate, thereby causing the frame 31 to deflect. The transmission unit 33 can reduce the transmission ratio between the drive shaft of the motor 32 and the frame 31, so as to accurately control the deflection angle of the frame 31 and adjust the cutter 14 to be perpendicular to the inclined pin. Furthermore, the self-locking property of the transmission unit 33 can also prevent the frame 31 from rotating due to force when the push rod 1 23 and push rod 27 push the cutter 14 to cut the pin, thus ensuring the pin cutting effect.

[0029] Iron frames 35 are fixed to the opposite sides of the two cutting tools 14. A magnetic sheet 28 is fixed to one end of the push rod 23 and attracted to the iron frame 35. When the push rod 23 and the push rod 27 are reset, the magnetic attraction of the magnetic sheet 28 drives the iron frame 35 and the cutting tool 14 to reset. This prevents the cutting tool 14 from blocking the opening of the housing 10 and the top cover 11. At the same time, it does not hinder the frame 31 from driving the cutting tool 14 and the iron frame 35 to deflect.

[0030] Working principle: Align the pins of the electronic component with the openings of the housing 10 and the top cover 11, then make the bottom surface of the electronic component contact the top cover 11, push the electronic component to move it above the top cover 11, at this time the pins of the electronic component enter the interior of the housing 10 through the opening, and the two clamping plates 12 are squeezed open by the electronic component and held on both sides of the electronic component under the elastic force. When cutting the pins of electronic components with non-centered pins, the electromagnet 293 is first activated to generate magnetic repulsion to push the magnetic block 295, which in turn causes the friction block 292 to contact the friction plate 291, causing the rotation of the gear 24 to generate resistance. Then, the telescopic rod 21 extends to push the mounting bracket 22. The mounting bracket 22 drives the push rod 23, gear 24, and rack 25 to move. The push rod 23 pushes the iron frame 35 until the tool 14 contacts the pin. During this process, due to the resistance to the rotation of gear 24, the resistance encountered by the push rod 23 when pushing the tool 14 is insufficient to cause the push rod 23 to slide relative to the mounting bracket 22 and drive gear 24 to rotate. After that, the push rod 23, iron frame 35, and tool 14 are blocked by the pin and cannot move further. The mounting bracket 22 continues to move, driving gear 24 and rack 25 to move simultaneously. 24 rolls on push rod 23, causing rack 25 to move relative to mounting bracket 22 towards gear 26. After rack 25 moves to the bottom of gear 26 and meshes with gear 26, rack 25 continues to move, causing gear 26 to rotate. Gear 26 then drives push rod 27 to move towards the direction of cutter 14 until push rod 27 pushes another iron bracket 35 and cutter 14 to contact the pin. At this time, both cutters 14 are in contact with both sides of the pin, preventing one cutter 14 from contacting and pushing the pin first when cutting the pin, thus reducing the risk of pin fatigue fracture. After both cutters 14 are in contact with the pins, the magnetic force of the control electromagnet 293 increases, increasing the friction between the friction block 292 and the friction plate 291. This friction locks gear 24, at which point push rod 23 and rack 25 are locked by gear 24. The extension of telescopic rod 21 continues, moving the mounting bracket 22. The mounting bracket 22, in turn, drives gear 24, causing push rod 23 to push cutter 14, while simultaneously moving rack 25 to rotate gear 26, which in turn drives push rod 27 to push the other cutter 14. The pin is sheared by the synchronous movement of two cutters 14. During this process, the rack 25 moves the same distance as the push rod 23. Under the transmission of the gear 26, the rack 25 moves the same distance as the push rod 27. Therefore, the push rod 23 and the push rod 27 move in the same direction relative to each other, so that the two cutters 14 move synchronously to shear the pin. The two cutters 14 apply symmetrical shearing force to the pin at the same time, avoiding local deformation caused by unilateral compression. This makes the edge of the pin shearing cut smoother and flatter, effectively reducing the generation of burrs and metal chips. When shearing the tilted pin, the motor 32 is started before the extension rod 21 is extended. The motor 32 drives the frame 31 to deflect through the transmission unit 33, thereby driving the two frames 34, the iron frame 35 and the cutter 14 to deflect, so that the two cutters 14 are perpendicular to the tilted pin. The deflection range of the frame 31 is within the range of ±15 degrees. During the deflection process, the iron frame 35 will not leave the magnetic attraction range of the magnetic sheet 28. Since the rack 25 and one end of the push rod 23 are in contact with the inner wall of the housing 10, the magnetic attraction between the iron frame 35 and the magnetic sheet 28 will not cause the push rod 23 to move. After the cutter 14 is perpendicular to the pin, the telescopic rod 21 is extended. Similar to the transmission principle described above, the push rod 23 and the push rod 27 push the two iron frames 35 and the cutter 14 respectively, so that the two cutters 14 contact the two sides of the pin and cut off the pin.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the present invention's technology and inventive concept, should be covered within the scope of protection of the present invention.

Claims

1. A fixed-length cutting device for electronic component pins, comprising a housing (10), a top cover (11) slidably connected to the top of the housing (10), a telescopic rod (13) with its telescopic end fixed to the top cover (11) installed inside the housing (10), and two cutting tools (14) disposed inside the housing (10), characterized in that, Also includes: The limiting drive mechanism (20) and the deflection mechanism (30) include a telescopic rod two (21) fixedly installed inside the housing (10), and a mounting bracket (22) fixed to the telescopic end of the telescopic rod two (21) is slidably connected inside the housing (10). Gear two (26) and gear one (24) are rotatably connected inside the housing (10) and the mounting bracket (22), respectively. Push rod two (27) meshing with the top of gear two (26) is slidably connected inside the housing (10). Push rod one (23) and rack (25) meshing with the top and bottom of gear one (24) are slidably connected inside the mounting bracket (22). A friction assembly (29) is provided inside the mounting bracket (22). By adjusting the rotational resistance of gear 1 (24) through the friction assembly (29), the limit drive mechanism (20) drives the two cutters (14) to contact the two sides of the pin, and then the pin is cut off by synchronously pushing the two cutters (14).

2. The electronic component pin length cutting device according to claim 1, characterized in that, The friction assembly (29) includes a friction plate (291) fixed to one side of the gear (24), and a friction block (292) is slidably connected inside the mounting bracket (22).

3. The electronic component pin length cutting device according to claim 2, characterized in that, An electromagnet (293) is fixedly installed inside the mounting bracket (22), a magnet (295) is fixedly installed inside the friction block (292), and a tension spring (294) is fixed between the friction block (292) and the inner wall of the mounting bracket (22).

4. The electronic component pin length cutting device according to claim 1, characterized in that, The deflection mechanism (30) includes two frames (34) located in the same plane, and the two cutters (14) are slidably connected inside the two frames (34).

5. The electronic component pin length cutting device according to claim 4, characterized in that, The deflection mechanism (30) further includes a frame (31) rotatably connected to the inside of the housing (10) and fixed to the two frames (34). A motor (32) is fixedly installed inside the housing (10), and a transmission unit (33) is provided between the motor (32) and the frame (31).

6. The electronic component pin length cutting device according to claim 5, characterized in that, The transmission unit (33) includes a worm (331) fixed to the drive shaft of the motor (32) and a worm wheel (332) fixed to one end of the frame (31), wherein the worm (331) and the worm wheel (332) mesh with each other.

7. The electronic component pin length cutting device according to claim 1, characterized in that, Iron frames (35) are fixed on opposite sides of the two cutting tools (14), and a magnetic sheet (28) is fixed to one end of the push rod (23) and adsorbed on the iron frame (35).

8. The electronic component pin length cutting device according to claim 1, characterized in that, The top cover (11) has two symmetrical clamps (12) internally elastically connected, and one side of the clamps (12) is set as an inclined surface.

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