Pin bending device for piezoresistors

Abstract

The application discloses a pin bending device for a pressure-sensitive resistor and relates to the field of pressure-sensitive resistor bending. The pin bending device comprises a device body, a bending mechanism and a resistor body. The inside of the bending mechanism is provided with an ejection mechanism, and the inside of the bending mechanism is provided with a rotating mechanism. The bottom of one side of the device body is fixedly connected with a collecting bin. Through synchronous reverse transmission of the driven gear and the upper and lower racks, two groups of protective sleeves are driven to adjust the interval. Then, the ejection slider is pushed forward, the top block drives the rotating plate to translate as a whole, the two protective sleeves on the two sides clamp the upper region of the pin from the front and back surfaces, then the ejection slider continues to advance, the rotating plate does fixed-axle circular arc rotation around the bottom connecting shaft, and the clamped upper part of the pin is bent together with the rotating plate. In the whole bending process, the stress of the pin is evenly dispersed in the clamping region, and the problems of cracking, breaking and plating layer falling off of the pin root caused by hard bending and excessive impact force can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of varistor bending, specifically to a varistor lead bending device. Background Technology

[0002] With the rapid development of the electronic information industry and the continuous growth in demand for circuit protection components, varistors are widely used in various electronic circuits such as home appliances, communications, and industrial control due to their excellent overvoltage protection and surge suppression performance.

[0003] Currently, most varistors in the industry use a stamping-type hard bending method for lead bending. First, the conveying device transports the resistor body to the bending station. The stamping mechanism drives the bending punch to move and directly impact the root of the lead to force bending and forming. For resistor products with different lead spacing, the machine needs to be stopped to replace the bending mold and positioning fixture of the corresponding specifications, and the punch stroke and bending angle need to be manually adjusted. Production can only be resumed after the adjustment is completed.

[0004] However, existing bending devices, due to their impact bending, concentrate the force highly at the root of the pins, which can easily cause the metal substrate of the pins to crack or break, and the surface plating to peel off, increasing the product defect rate and reducing the conductivity of the pins, thus affecting the quality of the varistor. Furthermore, the pins are prone to shifting and slipping during the bending process, and the mold fixtures need to be changed for products with different pin spacings, resulting in long production changeover and debugging times and low production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a pin bending device for varistors to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pin bending device for a varistor, comprising a device body, a bending mechanism and a resistor body, wherein the bending mechanism is provided with an ejection mechanism and a rotation mechanism, and a collection chamber is fixedly connected to the bottom side of the device body. The bending mechanism includes a fixed base, a driving component, and a stabilizing plate. Multiple sets of the fixed bases are fixedly connected to the side wall of the device body. The driving component is movably installed on the side wall of the device body. Two sets of the stabilizing plates are fixedly connected to the side wall of the device body and located between the fixed bases, and are used to limit the bottom of the pins of the resistor body. The ejection mechanism includes an ejection slider, a top block, a sliding plate, and a stabilizing spring. The ejection slider is slidably installed inside one of the fixed seats, and one end of the ejection slider is movably connected to the driving component. The top block is fixedly connected to the other end of the ejection slider. The sliding plate is slidably embedded inside the end of the ejection slider. The stabilizing spring is disposed inside the top block. The rotating mechanism includes a rotating plate and a protective sleeve. The two sets of rotating plates are movably connected to the end of the sliding plate and the top of the stabilizing plate, respectively. The protective sleeve is movably connected to one side of the rotating plate and is used to clamp the resistor pin and rotate synchronously with the rotating plate to complete the bending.

[0007] Preferably, the ejection mechanism further includes a placement cavity and a mounting plate. The placement cavity is opened inside the top block, and the stabilizing spring is located inside the placement cavity. The mounting plate is fixedly connected to the top of the top block and the ejection slider, and is used to disassemble and replace the stabilizing spring.

[0008] Preferably, the ejection mechanism further includes a fixing groove and a fixing plate. The fixing groove is formed on the inner side wall of the sliding plate, and the two sets of fixing plates are respectively fixedly connected to both ends of the stabilizing spring. One set of fixing plates is inserted into the fixing groove and is used to drive the sliding plate to reset together when the ejection block is reset.

[0009] Preferably, the rotating mechanism further includes a mounting shell, a sliding cylinder, a first adjusting slider, a driven gear, and a second adjusting slider. The mounting shell is fixedly connected to the side wall of the rotating plate away from the resistor body. The sliding cylinder is fixedly mounted on the top of the mounting shell. The first adjusting slider is slidably mounted on the slide rod of the sliding cylinder. The driven gear is rotatably mounted inside the mounting shell. The second adjusting slider is symmetrically slidably mounted inside the mounting shell with the first adjusting slider.

[0010] Preferably, a first rack is fixedly connected to the bottom of the first adjusting slider, and a second rack is fixedly connected to the bottom of the second adjusting slider. The first rack and the second rack are respectively meshed on the upper and lower sides of the driven gear. When the first adjusting slider moves, the driven gear drives the second adjusting slider to move synchronously in the opposite direction, which is used to adjust the distance between the two sets of protective sleeves.

[0011] Preferably, the rotating mechanism further includes a connecting shaft and a torsion spring. The connecting shaft is fixedly connected to the bottom of the rotating plate, and the torsion spring is sleeved on both ends of the connecting shaft. The rotating plate is elastically connected to the end of the sliding plate and the stabilizing plate respectively through the cooperation of the connecting shaft and the torsion spring, so as to automatically reset after the rotating plate rotates.

[0012] Preferably, the bending mechanism further includes a connecting block, which is fixedly connected to the top of one set of stabilizing plates, and the connecting block is rotatably connected to one set of rotating plates via a connecting shaft and a torsion spring.

[0013] Preferably, the side wall of the rotating plate is provided with a movable groove, and the first adjusting slider and the second adjusting slider pass through the movable groove and are fixedly connected to the protective sleeve.

[0014] Preferably, one end of the top block has an oblique structure, which is used to push the rotating plate to translate and clamp the resistor pin, and also to make the rotating plate rotate around the connecting shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a sliding cylinder to drive the first adjusting slider to move before bending. Then, through the synchronous reverse transmission of the driven gear and the upper and lower racks, the two sets of protective sleeves are adjusted to accommodate the pin spacing of resistors of different specifications, ensuring the position of the clamping protection. Subsequently, the ejector slider moves forward, and the top block first pushes the rotating plate to move horizontally as a whole, so that the protective sleeves on both sides clamp the upper area of ​​the pin from both sides. The clamping force is evenly distributed on the clamping surface, while the bottom of the pin is restricted between the two sets of stabilizing plates. After that, the ejector slider continues to move forward, and the rotating plate rotates around the bottom connecting shaft in a fixed-axis arc, causing the upper part of the clamped pin to bend together with the rotating plate. During the entire bending process, the force on the pin is evenly distributed in the clamping area, which can effectively avoid the problems of cracking, breaking, and plating peeling at the root of the pin due to hard bending and excessive impact. At the same time, the protective sleeve can isolate the top block from direct contact with the pin, preventing the plating on the pin surface from being scratched during bending, ensuring the consistency of the pin bending angle, and reducing the breakage rate of the pin during bending.

[0016] 2. This invention houses the stabilizing spring inside the ejection mechanism within a placement cavity inside the ejector block, with fixing plates at both ends. When the spring needs replacement due to elastic wear, there is no need to disassemble core components such as the ejection slider and drive unit. Simply unscrew the fastening bolts on the mounting plate to remove the entire stabilizing spring assembly from the placement cavity. To replace the new stabilizing spring assembly, simply insert the front fixing plate into the fixing groove on the inner side of the sliding plate for insertion and positioning, fit the rear end against the inner wall of the placement cavity, and then tighten the mounting plate to complete the replacement. There is no need to repeatedly adjust the spring preload. At the same time, the mounting plate acts as a seal, preventing external impurities from entering the placement cavity and causing jamming or wear between the spring and the sliding components, thereby indirectly extending the service life of the spring and indirectly improving the continuous production capacity of the equipment, while reducing the operational difficulty and labor intensity of maintenance personnel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of some parts of the present invention; Figure 3 This is a first-view structural schematic diagram of the rotating mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A; Figure 5 This is a first-view structural schematic diagram of the rotating mechanism of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B; Figure 7 This is a first-view structural schematic diagram of the ejection mechanism of the present invention; Figure 8 This is a schematic diagram of the ejection mechanism of the present invention from a second perspective; Figure 9 This is an exploded view of the ejection mechanism of the present invention.

[0018] In the diagram: 1. Equipment body; 2. Bending mechanism; 20. Fixed seat; 21. Driving component; 22. Stabilizing plate; 220. Connecting block; 3. Resistor body; 4. Ejection mechanism; 40. Ejection slider; 41. Ejector block; 410. Placement cavity; 42. Sliding plate; 420. Fixed groove; 43. Stabilizing spring; 44. Fixed plate; 45. Mounting plate; 5. Rotation mechanism; 50. Rotating plate; 500. Movable groove; 51. Mounting shell; 52. Sliding cylinder; 53. First adjusting slider; 530. First rack; 54. Driven gear; 55. Second adjusting slider; 550. Second rack; 56. Protective sleeve; 57. Connecting shaft; 570. Torsion spring; 6. Collection chamber. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0020] Please see Figures 1-9 The present invention provides the following technical solution: a pin bending device for a varistor, comprising a device body 1, a bending mechanism 2 and a resistor body 3, wherein the bending mechanism 2 is provided with an ejection mechanism 4 and a rotation mechanism 5, and a collection chamber 6 is fixedly connected to the bottom side of the device body 1. When the device body 1 is powered on, the resistor body 3 is fed into the bending mechanism 2 by an external conveying mechanism to bend the pins of the resistor body 3. After bending, the resistor body 3 will fall off the conveying mechanism and into the collection bin 6 under the operation of the shearing module, thus completing the overall bending process.

[0021] As one embodiment of the present invention, the ejection mechanism 4 includes an ejection slider 40, a top block 41, a sliding plate 42 and a stabilizing spring 43. The ejection slider 40 is slidably installed inside one of the fixed seats 20, and one end of the ejection slider 40 is movably connected to the driving member 21. The top block 41 is fixedly connected to the other end of the ejection slider 40. The sliding plate 42 is slidably embedded in the inner side of the end of the ejection slider 40. The stabilizing spring 43 is disposed inside the top block 41. Furthermore, the ejection mechanism 4 also includes a placement cavity 410 and a mounting plate 45. The placement cavity 410 is opened inside the top block 41, and the stabilizing spring 43 is located inside the placement cavity 410. The mounting plate 45 is fixedly connected to the top of the top block 41 and the top of the ejection slider 40, and is used to disassemble and replace the stabilizing spring 43. When the ejector slider 40 is moved toward the resistor body 3, one end of the top block 41 will press against one side of the rotating plate 50, so that the top block 41 can move together with the sliding plate 42 toward the resistor body 3. In the example, the ejection mechanism 4 also includes a fixing groove 420 and a fixing plate 44. The fixing groove 420 is opened on the inner side wall of the sliding plate 42. Two sets of fixing plates 44 are respectively fixedly connected to the two ends of the stabilizing spring 43. One set of fixing plates 44 is inserted into the fixing groove 420 and is used to drive the sliding plate 42 to reset together when the top block 41 is reset.

[0022] In one embodiment of the present invention, the rotating mechanism 5 includes a rotating plate 50 and a protective sleeve 56. The two sets of rotating plates 50 are respectively movably connected to the end of the sliding plate 42 and the top of the stabilizing plate 22. The protective sleeve 56 is movably connected to one side of the rotating plate 50 and is used to clamp the resistor pin and rotate synchronously with the rotating plate 50 to complete the bending. One end of the top block 41 has an inclined structure and is used to push the rotating plate 50 to translate and clamp the resistor pin, and also to make the rotating plate 50 rotate around the connecting shaft 57. As the rotating mechanism 5 is moved further, the two sets of protective sleeves 56 will fit together, and the pins of the resistor body 3 will be clamped between the two sets of protective sleeves 56. At this time, the two sets of rotating mechanisms 5 will also fit together, and the push-out slider 40 will be pushed forward. The push block 41 will then press against the side wall of the rotating plate 50. Since the two sets of protective sleeves 56 are fitted together, the rotating plate 50 cannot continue to move forward. Therefore, the rotating plate 50 will be forced to rotate around the connecting shaft 57, breaking through the elastic potential energy of the torsion spring 570. In the example, the rotating mechanism 5 also includes a mounting shell 51, a sliding cylinder 52, a first adjusting slider 53, a driven gear 54, and a second adjusting slider 55. The mounting shell 51 is fixedly connected to the side wall of the rotating plate 50 away from the resistor body 3. The sliding cylinder 52 is fixedly mounted on the top of the mounting shell 51. The first adjusting slider 53 is slidably mounted on the slide rod of the sliding cylinder 52. Furthermore, the driven gear 54 is rotatably mounted inside the mounting housing 51, and the second adjusting slider 55 and the first adjusting slider 53 are symmetrically slidably mounted inside the mounting housing 51. The side wall of the rotating plate 50 is provided with a movable groove 500, and the first adjusting slider 53 and the second adjusting slider 55 pass through the movable groove 500 and are fixedly connected to the protective sleeve 56. When the sliding cylinder 52 drives the first adjusting slider 53 to move, it will cause the second adjusting slider 55 to move synchronously in the opposite direction to the first adjusting slider 53, thereby moving the two sets of protective sleeves 56 synchronously to achieve adjustment according to the pin spacing of the resistor body 3. Furthermore, a first rack 530 is fixedly connected to the bottom of the first adjusting slider 53, and a second rack 550 is fixedly connected to the bottom of the second adjusting slider 55. The first rack 530 and the second rack 550 are respectively meshed on the upper and lower sides of the driven gear 54. When the first adjusting slider 53 moves, the driven gear 54 drives the second adjusting slider 55 to move in the opposite direction synchronously, which is used to adjust the distance between the two sets of protective sleeves 56. In the example, the rotating mechanism 5 also includes a connecting shaft 57 and a torsion spring 570. The connecting shaft 57 is fixedly connected to the bottom of the rotating plate 50, and the torsion spring 570 is sleeved on both ends of the connecting shaft 57. The rotating plate 50 is elastically connected to the end of the sliding plate 42 and the stabilizing plate 22 respectively through the cooperation of the connecting shaft 57 and the torsion spring 570, so as to automatically reset after the rotating plate 50 rotates. After the bending is completed, the ejector slider 40 moves away from the resistor body 3. At this time, as the ejector slider 40 moves, a set of rotating plates 50 near the top block 41 will be released from restriction and reset under the action of the torsion spring 570.

[0023] As one embodiment of the present invention, the bending mechanism 2 includes a fixed base 20, a driving member 21 and a stabilizing plate 22. Multiple fixed bases 20 are fixedly connected to the side wall of the device body 1, the driving member 21 is movably installed on the side wall of the device body 1, and two sets of stabilizing plates 22 are fixedly connected to the side wall of the device body 1 and located between the fixed bases 20, for limiting the bottom of the pins of the resistor body 3. After the resistor body 3 is fed into the bending mechanism 2, the resistor body 3 will first reach between the two sets of fixed seats 20. Then, the drive component inside the device body 1 will drive the drive component 21 to rotate after being powered on. Then, the ejector mechanism 4 will squeeze the rotating mechanism 5 through the transmission component. Furthermore, the bending mechanism 2 also includes a connecting block 220, which is fixedly connected to the top of one set of stabilizing plates 22. The connecting block 220 is rotatably connected to one set of rotating plates 50 via a connecting shaft 57 and a torsion spring 570. After the rotating plate 50 rotates, it will rotate along with the component that adjusts the pin spacing. The top of the pins of the resistor body 3 is clamped between the two sets of protective sleeves 56, while the bottom area of ​​the pins is restricted on the conveying device and stuck between the two sets of stabilizing plates 22. Therefore, after the two sets of rotating plates 50 rotate in the same direction, they will rotate along with the top of the resistor body 3, thereby achieving the bending of the resistor body 3. Since the area that the top block 41 presses against is the side wall of one of the rotating plates 50, it does not contact the resistor body 3. The resistor body 3 simply follows the rotation of the rotating plate 50 and rotates passively, thus achieving the bending.

[0024] Working principle: When in use, the device body 1 is first connected to the power supply, and then the resistor body 3 is fed into the bending mechanism 2 by the external conveying mechanism to bend the pins of the resistor body 3. When the resistor body 3 is fed into the bending mechanism 2, the resistor body 3 will first reach between the two sets of fixed seats 20. Then, after the drive component inside the device body 1 is powered on, it will drive the drive component 21 to rotate. Then, through the transmission component, the ejector mechanism 4 will squeeze the rotating mechanism 5. Then, the two sets of rotating mechanisms 5 will clamp the resistor body 3. Subsequently, the set of rotating mechanisms 5 installed on the ejector mechanism 4 will continue to be squeezed, and will press the resistor body 3 onto the stabilizing plate 22. Then, the rotating mechanism 5 will rotate together with the resistor body 3, thereby bending the pins of the resistor body 3. After the resistor body 3 enters the fixed base 20, the rotating mechanism 5 will be activated and will be adjusted according to the spacing between the pins of the resistor body 3. First, the sliding cylinder 52 is activated, which will move the first adjusting slider 53 on the slide rod inside the sliding cylinder 52. A first rack 530 is installed at the bottom of the first adjusting slider 53, and a driven gear 54 is provided on the toothed side of the first rack 530 to mesh with the teeth of the first rack 530. At the bottom of the driven gear 54, a second rack 550 is also provided to mesh with it, and a second adjusting slider 55 is installed at one end of the second rack 550. On the side of the first adjusting slider 53 and the second adjusting slider 55 that are close to the resistor body 3, a protective sleeve 56 is provided. Therefore, when the sliding cylinder 52 drives the first adjusting slider 53 to move, the second adjusting slider 55 will move synchronously in the opposite direction to the first adjusting slider 53, thereby moving the two sets of protective sleeves 56 synchronously to achieve adjustment according to the pin spacing of the resistor body 3. After adjusting the pin spacing of the resistor body 3, the resistor body 3 is sent between the two sets of fixed seats 20. The ejector slider 40 is driven by the drive component 21 to slide in the fixed seat 20. The end of the ejector slider 40 is mounted with the top block 41 through the mounting plate 45, and the sliding plate 42 is slidably mounted in the ejector slider 40. When the ejector slider 40 is moved toward the resistor body 3, a placement cavity 410 is opened inside the top block 41, and a fixing plate 44 and a stabilizing spring 43 are placed in the placement cavity 410. The bottom of one set of fixing plates 44 can be inserted into the fixing groove 420, while the other set of fixing plates 44 is attached to the inner wall of one end of the placement cavity 410. The slanted end of the top block 41 is attached to one side of one of the rotating plates 50. The bottom of the rotating plates 50 near the top block 41 is connected to one end of the sliding plate 42 through the connecting shaft 57 and the torsion spring 570. Therefore, when the top block 41 moves toward the resistor body 3 along with the ejector slider 40, one end of the top block 41 will press against one side of the rotating plate 50, and at the same time, the inside of the top block 41 will press against the fixed plate 44 on the side away from the resistor body 3, so that the top block 41 can move toward the resistor body 3 together with the sliding plate 42. After the rotating mechanism 5 mounted on the sliding plate 42 is moved a certain distance, a protective sleeve 56 is installed on the side of the rotating plate 50 close to the resistor body 3, which can be locked onto the pins of the resistor body 3. Another set of rotating plates 50 is mounted on the connecting block 220 on the surface of the stabilizing plate 22 via a connecting shaft 57 and a torsion spring 570. Therefore, as the rotating mechanism 5 is moved further, the two sets of protective sleeves 56 will fit together, and the pins of the resistor body 3 will be clamped between the two sets of protective sleeves 56. At this time, the two sets of rotating mechanisms 5 will also fit together. At this time, the ejector slider 40 is carried forward and the ejector block 41 will hit the side wall of the rotating plate 50. Since the two sets of protective sleeves 56 are attached, the rotating plate 50 cannot continue to move forward. Therefore, as the ejector slider 40 continues to move forward, it will force the rotating plate 50 to rotate around the connecting shaft 57, breaking through the elastic potential energy of the torsion spring 570. Meanwhile, within the placement cavity 410, since the rotating mechanism 5 cannot move forward, the sliding plate 42 will no longer move forward. A cavity is opened inside the ejector slider 40 to provide space for the sliding plate 42 to move. Inside the placement cavity 410, the top block 41 continues to move forward and will press against a set of fixed plates 44, forcing the fixed plates 44 to break through the elastic potential energy of the stabilizing spring 43, thereby squeezing the stabilizing spring 43. After the rotating plate 50 rotates, it will rotate along with the component that adjusts the pin spacing. The top of the pin of the resistor body 3 is clamped between the two sets of protective sleeves 56, while the bottom area of ​​the pin is restricted on the conveying device and stuck between the two sets of stabilizing plates 22. Therefore, after the two sets of rotating plates 50 rotate in the same direction, they will rotate along with the top of the resistor body 3, thereby achieving the bending of the resistor body 3. Since the area that the top block 41 presses against is the side wall of one of the rotating plates 50, it does not contact the resistor body 3. The resistor body 3 only passively rotates with the rotation of the rotating plate 50, thus achieving the bending. This avoids the phenomenon that the top block 41 directly contacts the pin of the resistor body 3 for bending in traditional bending, which is prone to pin breakage and damage. After the bending is completed, the ejector slider 40 moves away from the resistor body 3 under the action of the drive component 21. At this time, as the ejector slider 40 moves, a set of rotating plates 50 near the top block 41 will be released from restriction and reset under the action of the torsion spring 570. However, the other set of rotating plates 50 cannot be reset temporarily because the resistor body 3 is in the bending stage at this time. As the rotating plate 50 moves further away, since the bottom of one set of fixed plates 44 is stuck in the fixed groove 420, the rotating plate 50 will be reset along with the sliding plate 42 through the fixed plate 44 during the process of returning to the initial position. At this time, the conveying mechanism will continue to move with the resistor body 3. When the resistor body 3 moves out of the bending area, the other set of rotating plates 50 will also be reset under the action of the torsion spring 570. After the bending process is completed, the resistor body 3 will be detached from the conveying mechanism and fall into the collection bin 6 under the operation of the shearing module, thus completing the overall bending process. When the stabilizing spring 43 inside the top block 41 experiences elastic wear after prolonged use, it needs to be replaced. To do this, simply loosen the bolts on the mounting plate 45, manually remove the stabilizing spring 43 and the fixing plate 44 from the placement cavity 410, insert a new set of fixing plates 44 and stabilizing spring 43, insert one set of fixing plates 44 into the fixing groove 420, and then re-fix the mounting plate 45 with bolts to complete the replacement of the stabilizing spring 43. It should be emphasized that the transmission principle of the sliding cylinder 52, the gear and rack transmission principle, the eccentric wheel transmission principle of the driving component 21, and the bending principle of the top block 41 on the resistor body 3 involved in this invention are all existing known technologies. At the same time, the elastic coefficient of the torsion spring 570, the elastic coefficient of the stabilizing spring 43, the specific model of the sliding cylinder 52, and the specific models of the first rack 530, the driven gear 54, and the second rack 550 need to be flexibly adjusted according to the actual use, and will not be discussed in detail.

[0025] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A lead bending device for a varistor, comprising a device body (1), a bending mechanism (2), and a resistor body (3), characterized in that: The bending mechanism (2) is provided with an ejection mechanism (4) inside, and the bending mechanism (2) is provided with a rotation mechanism (5) inside. A collection bin (6) is fixedly connected to the bottom side of the equipment body (1). The bending mechanism (2) includes a fixed base (20), a driving component (21), and a stabilizing plate (22). Multiple sets of fixed bases (20) are fixedly connected to the side wall of the device body (1). The driving component (21) is movably installed on the side wall of the device body (1). Two sets of stabilizing plates (22) are fixedly connected to the side wall of the device body (1) and located between the fixed bases (20) to limit the bottom of the pins of the resistor body (3). The ejection mechanism (4) includes an ejection slider (40), a top block (41), a sliding plate (42), and a stabilizing spring (43). The ejection slider (40) is slidably installed inside one of the fixed seats (20), and one end of the ejection slider (40) is movably connected to the driving member (21). The top block (41) is fixedly connected to the other end of the ejection slider (40). The sliding plate (42) is slidably embedded in the inner side of the end of the ejection slider (40). The stabilizing spring (43) is disposed inside the top block (41). The rotating mechanism (5) includes a rotating plate (50) and a protective sleeve (56). The two sets of rotating plates (50) are movably connected to the end of the sliding plate (42) and the top of the stabilizing plate (22), respectively. The protective sleeve (56) is movably connected to one side of the rotating plate (50) and is used to clamp the resistor pin and rotate synchronously with the rotating plate (50) to complete the bending. The rotating mechanism (5) further includes a mounting shell (51), a sliding cylinder (52), a first adjusting slider (53), a driven gear (54), and a second adjusting slider (55). The mounting shell (51) is fixedly connected to the side wall of the rotating plate (50) away from the resistor body (3). The sliding cylinder (52) is fixedly installed on the top of the mounting shell (51). The first adjusting slider (53) is slidably installed on the slide rod of the sliding cylinder (52). The driven gear (54) is rotatably installed inside the mounting shell (51). The second adjusting slider (55) is symmetrically slidably installed inside the mounting shell (51) with the first adjusting slider (53). The bottom of the first adjusting slider (53) is fixedly connected to a first rack (530), and the bottom of the second adjusting slider (55) is fixedly connected to a second rack (550). The first rack (530) and the second rack (550) are respectively meshed on the upper and lower sides of the driven gear (54). When the first adjusting slider (53) moves, the driven gear (54) drives the second adjusting slider (55) to move synchronously in the opposite direction, which is used to adjust the distance between the two sets of protective sleeves (56). The rotating mechanism (5) also includes a connecting shaft (57) and a torsion spring (570). The connecting shaft (57) is fixedly connected to the bottom of the rotating plate (50). One end of the top block (41) has an oblique structure, which is used to push the rotating plate (50) to translate and clamp the resistor pin, and also to make the rotating plate (50) rotate around the connecting shaft (57).

2. The lead bending device for a varistor according to claim 1, characterized in that: The ejection mechanism (4) further includes a placement cavity (410) and a mounting plate (45). The placement cavity (410) is opened inside the top block (41), and the stabilizing spring (43) is located inside the placement cavity (410). The mounting plate (45) is fixedly connected to the top of the top block (41) and the ejection slider (40) for disassembling and replacing the stabilizing spring (43).

3. The lead bending device for a varistor according to claim 2, characterized in that: The ejection mechanism (4) further includes a fixing groove (420) and a fixing plate (44). The fixing groove (420) is opened on the inner side wall of the sliding plate (42). Two sets of fixing plates (44) are respectively fixedly connected to the two ends of the stabilizing spring (43). One set of fixing plates (44) is inserted into the fixing groove (420) and is used to drive the sliding plate (42) to reset together when the top block (41) is reset.

4. The lead bending device for a varistor according to claim 3, characterized in that: The torsion spring (570) is sleeved on both ends of the connecting shaft (57). The rotating plate (50) is elastically connected to the end of the sliding plate (42) and the stabilizing plate (22) respectively through the cooperation of the connecting shaft (57) and the torsion spring (570), so as to automatically reset after the rotating plate (50) rotates.

5. The lead bending device for a varistor according to claim 4, characterized in that: The bending mechanism (2) also includes a connecting block (220), which is fixedly connected to the top of one of the set of stabilizing plates (22). The connecting block (220) is rotatably connected to one of the set of rotating plates (50) through a connecting shaft (57) and a torsion spring (570).

6. The lead bending device for a varistor according to claim 5, characterized in that: The rotating plate (50) has a movable groove (500) on its side wall. The first adjusting slider (53) and the second adjusting slider (55) pass through the movable groove (500) and are fixedly connected to the protective sleeve (56).

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