A capacitor core size screening device

Abstract

The application belongs to the technical field of capacitor core production, and particularly relates to a capacitor core size screening device, which comprises two screening roller assemblies symmetrically arranged at an inclined fixed angle in a machine box. The screening roller assembly comprises a rotating roller, the two ends of the rotating roller are rotationally connected with bearing seat one and bearing seat two, bearing seat one is rotationally arranged in the inner part of mounting seat one, the inner wall of mounting seat one is provided with an arc-shaped sliding groove, bearing seat two is provided with a sliding part, the sliding part is slidingly arranged in the sliding groove, one side of bearing seat two is provided with a wedge-shaped part, the two wedge-shaped parts of the two bearing seat two are connected with a taper head in a matched mode, an adjusting cylinder is connected with the taper head in transmission, so that the angle between the two rotating rollers can be adjusted through the extension and retraction of the adjusting cylinder, capacitor cores of different sizes can be screened, the screening granularity range of the screening device is increased, and screening work of multiple material diameters can be completed by using the same screening device.

Description

Technical Field

[0001] This invention belongs to the field of capacitor core manufacturing technology, and in particular relates to a capacitor core size screening device. Background Technology

[0002] Foil-structured capacitor cores are commonly used in the manufacture of capacitors. A capacitor is an electronic component used to store electrical charge and energy; it consists of an insulator (the capacitor core) between two conductors.

[0003] The production process of capacitor cores includes: winding, hot pressing, heat treatment, masking, and gold spraying.

[0004] The capacitor core needs to be wound because winding increases the capacitor's capacitance. Winding is the process of forming a winding around the capacitor core. By winding a conductor coil around the core, the surface area of ​​the core is increased, thereby increasing the capacitor's capacitance. Therefore, winding is an essential step in capacitor manufacturing. After winding, the capacitor cores vary in size. During the hot pressing process, larger cores experience greater force on the hot pressing plate than smaller cores, resulting in over-pressing of larger cores and poor pressing of smaller cores, sometimes leading to soft cores. Therefore, capacitor cores of different sizes need to be screened and classified before hot pressing. During hot pressing, capacitor cores of the same size are placed on the same aluminum plate for hot pressing. This ensures a more concentrated capacitance distribution, achieving consistent hot pressing results and guaranteeing product quality.

[0005] Existing capacitor cores do not have dedicated screening devices and are screened using ordinary vibrating screening mechanisms. After being screened by the screening device, the capacitor cores are easily subjected to external forces (vibration, compression, etc.) during the screening process, which may cause deformation of the core holes and thus affect the product shaping. Summary of the Invention

[0006] In view of the technical problems existing in the background art, the present invention provides a capacitor core size screening device.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0008] A capacitor core size screening device includes a chassis. Two screening roller assemblies are symmetrically arranged at a fixed inclined angle inside the chassis. Mounting base one and mounting base two are respectively located at both ends of the chassis. Each screening roller assembly includes a rotating roller, the two ends of which are rotatably connected to bearing housing one and bearing housing two, respectively. Bearing housing one is rotatably mounted inside mounting base one, and its inner wall has an arc-shaped groove. Bearing housing two has a sliding part that slides within the groove. One side of bearing housing two has a wedge-shaped part, and a conical head is connected between the two wedge-shaped parts of the two bearing housing two. An adjusting cylinder is located inside mounting base two, and the adjusting cylinder is connected to the conical head for transmission, thereby allowing adjustment of the angle between the two rotating rollers by extending and retracting the adjusting cylinder. An adjusting screw is located on the side of mounting base two, and a spring is mounted on the adjusting screw, with the spring closely attached to the side wall of bearing housing two.

[0009] Optionally, the mounting base one is rotatably provided with a rotating shaft inside, a gear is connected to the rotating shaft, the bearing seat one is fixed on the gear, and the two gears on the two bearings one are meshed with each other.

[0010] Optionally, an encoder is provided at the bottom end of the rotating shaft. The encoder, the adjusting cylinder, and the control system are electrically connected. When the angle measured by the encoder changes, the control system can control the extension and retraction of the adjusting cylinder according to the angle change value, thereby correcting the angle between the two rotating rollers.

[0011] Optionally, the mounting base 2 has a fixed base inside, and a guide cylinder is provided on the fixed base. A U-shaped guide block extends from one end of the guide cylinder. The piston rod of the adjusting cylinder is slidably disposed inside the guide cylinder, and the two sides of the cone head are slidably disposed close to the inner wall of the guide block.

[0012] Optionally, a material box is detachably provided at the bottom of the chassis, and several partitions are slidably provided inside the material box to divide the material box into multiple storage cavities.

[0013] Optionally, guide portions are provided on both sides of the partition, and the guide portions are slidably disposed close to the outer wall of the material box, and locking screws are also provided on the guide portions.

[0014] Optionally, guide portions are provided on both sides of the partition, and the guide portions are slidably disposed close to the outer wall of the material box; a guide groove is provided inside the partition, and a slider is slidably disposed in the guide groove; a horizontal cylinder is provided at the upper end of the material box near the feeding direction, and the piston rod of the horizontal cylinder is fixedly connected to the first partition; at least one partition has a vertical hole at its upper end, the lower section of the vertical hole is connected to the guide groove, a vertical cylinder is provided on the partition, and the piston rod of the vertical cylinder extends into the vertical hole and is connected to the side wall of the slider; two adjacent partitions are connected by two scissor arms, the upper end of the scissor arms is hinged to the side wall of the partition, and the lower end of the scissor arms is hinged inside the slider, and the scissor arms arranged in pairs are hinged to each other.

[0015] Optionally, an installation groove 1 and an installation groove 2 communicating with the guide groove are provided inside the partitions on the upper and lower sides of the guide groove. A roller 1 is provided in the installation groove 1, and a roller 2 is provided in the installation groove 2. A strip component 1 is wound on the roller 1 and connected to the lower end of the slider, and a strip component 2 is wound on the roller 2 and connected to the upper end of the slider.

[0016] The present invention has the following advantages and beneficial effects:

[0017] I. In this invention, two screening roller assemblies are symmetrically arranged at a fixed inclined angle inside the casing. A material bin is set below to receive the capacitor cores after core diameter sorting. The capacitor cores are poured into the hopper of the screening device, allowing them to slide through the gap between the rollers and fall into different receiving boxes according to their different sizes, thereby achieving the purpose of screening capacitor cores by size and classifying and packaging them. This method avoids the problem of core deformation caused by external forces (vibration, compression, etc.) on the capacitor cores during the screening process, which would affect the product shaping.

[0018] Secondly, the angle of the two screening roller assemblies is adjustable. Through the cooperation of the cone head and the wedge block on the bearing seat, the gap between the two rollers can be adjusted by adjusting the extension and retraction of the cylinder, thereby screening capacitor cores of different sizes, increasing the screening particle size range of the screening device, and achieving multi-purpose screening. There is no need to change screening devices of different diameters. Multiple material diameters can be screened by using the same screening device. Attached Figure Description

[0019] Figure 1 A front view of the screening device provided by the present invention;

[0020] Figure 2 for Figure 1 Structural diagram along direction A;

[0021] Figure 3 for Figure 1 A cross-sectional view along the BB direction;

[0022] Figure 4 A structural diagram of the screening roller assembly provided by the present invention;

[0023] Figure 5 for Figure 4 A magnified view of a portion of point a.

[0024] Figure 6 for Figure 4 A magnified view of a section at point b in the middle;

[0025] Figure 7 A connection structure diagram of the screening roller assembly and mounting base provided by the present invention;

[0026] Figure 8 A connection structure diagram of the screening roller assembly and mounting base II provided by the present invention;

[0027] Figure 9 The structure for adjusting the angle between screening rollers provided by the present invention Figure 1 ;

[0028] Figure 10 The structure for adjusting the angle between screening rollers provided by the present invention Figure 2 ;

[0029] Figure 11 This is a first structural diagram of the material box provided by the present invention;

[0030] Figure 12 for Figure 11 A cross-sectional view along the CC direction;

[0031] Figure 13 This is a second structural diagram of the material box provided by the present invention;

[0032] Figure 14 for Figure 13 A cross-sectional view along the DD direction;

[0033] Figure 15 for Figure 13 A magnified view of a section at point c in the middle;

[0034] Figure 16 for Figure 13 A magnified view of a portion at point d in the middle;

[0035] Figure 17 for Figure 13 A magnified view of a section at point e in the middle;

[0036] Figure 18 for Figure 14 A magnified view of a portion at point f.

[0037] Figure 19 This is a structural diagram of the folding and adjusting storage cavity of the material box provided by the present invention;

[0038] Icons: 1-Chassis, 11-Support column, 12-Hopper, 13-Mounting base one, 14-Mounting base two, 141-Groove, 15-Adjusting screw, 151-Spring, 16-Fixed seat, 17-Allowing groove, 2-Roller, 2a-Feed gap, 21-Mandrel, 22-Bearing seat one, 23-Motor one, 24-Gear, 241-Shaft, 242-Encoder, 25-Bearing seat two, 26-Wedge-shaped part, 27-Sliding part, 3-Box, 3a-Storage cavity, 31 - Partition plate, 311 Guide groove, 312 Vertical hole, 313 Mounting groove one, 314 Mounting groove two, 32 Guide part, 321 Locking screw, 4 Vertical cylinder, 41 Piston rod, 5 Horizontal cylinder, 6 Scissor arm, 61 Hinge part, 7 Reel one, 71 Strip assembly one, 8 Slider, 81 Through groove, 82 Pin, 9 Reel two, 91 Strip assembly two, 10 Adjusting cylinder, 101 Cone head, 102 Guide cylinder, 103 Guide block. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, but not all embodiments.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] Example

[0042] like Figure 1 , Figure 2 As shown, a capacitor core size screening device includes a housing 1, a support column 11 at the bottom of the housing 1, and two screening roller assemblies symmetrically arranged at a fixed inclined angle inside the housing 1.

[0043] like Figure 2-8 As shown, mounting base 13 and mounting base 14 are respectively provided inside both ends of the casing 1. The screening roller assembly includes a rotating roller 2, and a spindle 21 is provided inside the rotating roller 2. The two ends of the spindle 21 are rotatably connected to bearing housing 22 and bearing housing 25 respectively. A hopper 12 is provided at a high position of the casing 1. The bottom end of the hopper 12 is located between the two rotating rollers 2, and there is a feeding gap 2a between the two rotating rollers 2.

[0044] like Figure 5 ,7 As shown, bearing housing 22 is rotatably disposed inside mounting base 13. Specifically, a rotating shaft 241 is rotatably disposed inside mounting base 13, and a gear 24 is connected to the rotating shaft 241. Bearing housing 22 is fixed on the gear 24, and the two gears 24 on the two bearing housings 22 are meshed with each other.

[0045] like Figure 6 , Figure 8 As shown, the inner wall of the second mounting base 14 has arc-shaped grooves 141 at both the upper and lower ends, and the bearing seat 25 has sliding parts 27 at both the upper and lower ends, which are slidably disposed in the grooves 141. The housing 1 has symmetrical clearance grooves 17, and the spindle 21 at the end where the bearing seat 25 is located is disposed in the clearance groove 17. The roller 2 can slide along the grooves 141 with the rotating shaft 241 as the axis, adjusting the angle.

[0046] like Figure 3 , 6 As shown, a wedge-shaped portion 26 is provided on one side of the bearing housing 25, and two wedge-shaped portions 26 are symmetrically arranged. A cone head 101 is connected between the two wedge-shaped portions 26 of the two bearing housings 25. An adjusting cylinder 10 is provided inside the mounting base 24. The adjusting cylinder 10 and the cone head 101 are connected and driven, so that the angle between the two rotating rollers 2 can be adjusted by extending and retracting the adjusting cylinder 10. An adjusting screw 15 is provided on the side of the mounting base 24, and a spring 151 is provided on the adjusting screw 15. The spring 151 is set tightly against the side wall of the bearing housing 25. When the adjusting cylinder 10 is extended, the spring 151 is tightly pressed against the side wall of the bearing housing 25. The cone head 101 pushes the wedge-shaped portion 26, causing the bearing housing 25 to move along the slide groove 141, changing the angle between the two rotating rollers 2.

[0047] like Figure 6 As shown, further, a fixed seat 16 is provided inside the mounting base 14, and a guide cylinder 102 is provided on the fixed seat 16. A U-shaped guide block 103 extends from one end of the guide cylinder 102. The piston rod of the adjusting cylinder 10 is slidably disposed inside the guide cylinder 102, and the two sides of the cone head 101 are slidably disposed close to the inner wall of the guide block 103. By precisely guiding the adjusting cylinder 10 and the cone head 101, the accuracy of angle adjustment is ensured.

[0048] like Figure 7As shown, an encoder 242 is further provided at the bottom of the rotating shaft 241. The encoder 242, the adjusting cylinder 10, and the control system are electrically connected. When the angle measured by the encoder 242 changes, the control system can control the extension and retraction of the adjusting cylinder 10 according to the angle change value, thereby correcting the angle between the two rotating rollers 2. With this setting, after the angle of the two rotating rollers 2 is adjusted, the encoder 242 monitors the condition of the rotating shaft 241. Once the rotating shaft 241 rotates, the encoder 242 detects the angle change, which can then be fed back to the control system to control the adjusting cylinder 10 to extend or retract, so as to maintain the angle between the two rotating rollers 2 unchanged, or with a small change, maintaining it within a reliable range, further ensuring that the screening device still has sufficient screening accuracy after long-term screening.

[0049] Material screening is performed using a feeding gap 2a between two rotating rollers 2. This gap gradually increases from the feeding direction to the discharging direction, allowing for the screening of materials with different diameters. Because the rotating rollers 2 are relatively long, and the capacitor core being screened is a small-diameter material, the angle between the two rollers 2 is small, generally within 5°. Furthermore, each adjustment of the angle between the two rollers 2 is typically within ±0.5°. Figure 9 As shown, when the angle between the two rotating rollers 2 is a°, the range of a is 0-5°. The feed gap 2a is divided into five segments with different screening diameters: L1, L2, L3, L4, and L5. Normally, these five segments correspond to different storage cavities 3a. However, for this screening device with very high angle precision requirements, even a small angle change can cause the screening particle accuracy to be substandard. This means that the same storage cavity will contain materials of various diameters, leading to a decrease in screening accuracy. Because during long-term screening, once the angle of the rotating rollers 2 changes, even a very small change, such as... Figure 10 As shown, when the angle of the two rotating rollers 2 increases by 0.5°, the feed gap 2a increases geometrically, causing all the screening sections that meet the requirements to move forward and towards the feed direction. However, if the lower hopper 3 does not adapt accordingly, it will receive not only materials that are suitable for the particle size, but all materials may need to be re-screened. Therefore, further optimization design is required.

[0050] like Figure 1 , Figure 11 and Figure 12 As shown, a material bin 3 is detachably mounted on the bottom of the casing 1. Several partitions 31 are slidably mounted inside the material bin 3, dividing the material bin 3 into multiple storage cavities 3a. This design allows for the adjustment of the size of the storage cavities 3a by sliding the partitions 31 when adjusting the angle of the two rotating rollers 2 by adjusting the cylinder 10, or when the angle changes during the screening process.

[0051] like Figure 12 As shown, furthermore, guide portions 32 are provided on both sides of the partition 31. The guide portions 32 are slidably disposed close to the outer wall of the material box 3, and locking screws 321 are also provided on the guide portions 32. The guide portions 32 are used for sliding guidance to ensure that the partition 31 can be smoothly slidably adjusted, and after adjustment, it is fixed by locking screws 321.

[0052] like Figure 13-18 As shown, guide portions 32 extend from both sides of the partition 31 and slide close to the outer wall of the material box 3. A guide groove 311 is provided inside the partition 31, and a slider 8 is slidably disposed within the guide groove 311. A horizontal cylinder 5 is provided at the upper end of the material box 3 near the feeding direction. Because the roller 2 is arranged at an angle, there is a higher space at the feeding end, hence the horizontal cylinder 5 is positioned on this side. The piston rod 41 of the horizontal cylinder 5 is fixedly connected to the first partition 31, and the sliding of the partition 31 can be controlled by the horizontal cylinder 5. At least one partition 31 has a vertical hole 312 at its upper end. In this invention, the first partition 31 has a vertical hole 312. The vertical holes 312 are symmetrically arranged at both ends of the partition 31, and the lower section of the vertical hole 312 communicates with the guide groove 311. A vertical cylinder 4 is installed on the partition 31. The piston rod 41 of the vertical cylinder 4 extends into the vertical hole 312 and connects to the side wall of the slider 8, thereby controlling the slider 8 to move up and down in the guide groove 311 by extending and retracting the vertical cylinder 4. Two adjacent partitions 31 are connected by two scissor arms 6. The two ends of the scissor arms 6 are provided with hinge parts 61. The upper hinge part 61 is fixed to the side wall of the partition 31. The slider 8 is provided with through grooves 81 on both sides. Pins 82 are installed in the through grooves 81. The lower hinge part 61 of the scissor arms 6 is set on the pins 82. The scissor arms 6 are hinged to each other in pairs.

[0053] This design allows for the extension of the vertical cylinder 4 and the downward movement of the slider 8, which in turn, through the linkage of the cross arms, causes the adjacent partitions 31 to move closer to each other. Figure 13 , 19 As shown, when the vertical cylinder 4 extends, it pushes the slider 8 downward, thereby causing several partitions 31 to move closer together, thus reducing the storage cavity and making adaptive adjustments. At the same time, the horizontal cylinder 5 retracts, causing multiple partitions 31 to move to the left, i.e., towards the feeding direction. In this way, when the gap between the rollers 2 changes, the position of the partitions 31 can be adjusted in time by the horizontal cylinder 5 and the vertical cylinder 4, changing the size of the storage cavity 3a, always corresponding to the material gap, that is, always allowing material of the appropriate particle size to fall into the corresponding storage cavity 3a, ensuring the screening accuracy requirements and avoiding repeated secondary screening.

[0054] In practical use, the encoder 242 constantly monitors the rotation of the shaft 241. Once the angle changes, the control system promptly controls the horizontal cylinder 5 and the vertical cylinder 4 to extend and retract according to the angle change, so that the size and position of the storage cavity 3a change with the change of the feeding gap 2a.

[0055] Furthermore, mounting groove 1 313 and mounting groove 2 314, which communicate with the guide groove 311, are provided inside the partitions 31 on both the upper and lower sides of the guide groove 311. Mounting groove 1 313 contains a roller 7, and mounting groove 2 314 contains a roller 2 9. A strip component 1 71 is wound on roller 1 7 and connected to the lower end of the slider 8, and a strip component 2 91 is wound on roller 2 9 and connected to the upper end of the slider 8. Roller 1 7 and roller 2 9 are connected to a torsion spring, providing the automatic rotation and reset capability of roller 1 7 and roller 2 9. When the vertical cylinder 4 extends, it pushes the slider 8 downward. At this time, the slider 8 drives the strip component 2 91 downward, pulling the roller 2 9 to rotate, and the corresponding torsion spring is twisted to generate torque. At the same time, roller 1 7 resets by the torque of the torsion spring, driving the strip component 1 71 to descend. With this configuration, whether the slider 8 moves up or down, it can pull the first strip component 71 and the second strip component 91 to move synchronously, always sealing the space of the guide groove 311, ensuring that there is no communication between adjacent partitions 31, and providing storage space.

[0056] Of course, when the partition 31 has sufficient height, the depth of the guide groove 311 can be set to be shallower, so the strip assembly is not needed to seal the guide groove 311. In specific applications, the appropriate method should be selected based on the actual situation.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A capacitor core size screening device, comprising a chassis, wherein two screening roller assemblies are symmetrically arranged at a fixed inclined angle within the chassis, characterized in that... : The two ends of the chassis are respectively provided with mounting base one and mounting base two. The screening roller assembly includes a rotating roller. The two ends of the rotating roller are rotatably connected to bearing base one and bearing base two respectively. Bearing base one is rotatably disposed inside mounting base one. The inner wall of mounting base two is provided with an arc-shaped sliding groove. The bearing base two is provided with a sliding part, which is slidably disposed in the sliding groove. A wedge-shaped part is provided on one side of the bearing seat 2, and a cone head is connected between the two wedge-shaped parts of the two bearing seats 2. An adjusting cylinder is provided inside the mounting seat 2. The adjusting cylinder and the cone head are connected and driven, so that the angle between the two rollers can be adjusted by extending and retracting the adjusting cylinder. An adjusting screw is provided on the side of the second mounting base, and a spring is provided on the adjusting screw. The spring is closely attached to the side wall of the second bearing seat. The mounting base 1 has a rotating shaft rotatably installed inside, and a gear is connected to the rotating shaft. The bearing seat 1 is fixed on the gear, and the two gears on the two bearings 1 are meshed with each other. An encoder is provided at the bottom of the rotating shaft. The encoder, the adjusting cylinder and the control system are electrically connected. When the angle measured by the encoder changes, the control system can control the extension and retraction of the adjusting cylinder according to the angle change value, thereby correcting the angle between the two rotating rollers. The bottom of the chassis is detachably equipped with a material box, and several partitions are slidably arranged inside the material box to divide the material box into multiple storage cavities. Guide portions are provided on both sides of the partition, and the guide portions are slidably disposed close to the outer wall of the material box; a guide groove is provided inside the partition, and a slider is slidably disposed in the guide groove; a horizontal cylinder is provided at the upper end of the material box near the feeding direction, and the piston rod of the horizontal cylinder is fixedly connected to the first partition; at least one partition has a vertical hole at its upper end, the lower section of the vertical hole is connected to the guide groove, a vertical cylinder is provided on the partition, and the piston rod of the vertical cylinder extends into the vertical hole and is connected to the side wall of the slider; two adjacent partitions are connected by two scissor arms, the upper end of the scissor arms is hinged to the side wall of the partition, and the lower end of the scissor arms is hinged inside the slider, and the scissor arms arranged in pairs are hinged to each other.

2. The capacitor core size screening device according to claim 1, characterized in that: The mounting base 2 has a fixed base inside, and a guide cylinder is provided on the fixed base. A U-shaped guide block extends from one end of the guide cylinder. The piston rod of the adjusting cylinder is slidably disposed inside the guide cylinder, and the two sides of the cone head are slidably disposed close to the inner wall of the guide block.

3. The capacitor core size screening device according to claim 1, characterized in that: Guide portions are provided on both sides of the partition, and the guide portions are slidably disposed close to the outer wall of the material box. Locking screws are also provided on the guide portions.

4. The capacitor core size screening device according to claim 1, characterized in that: The partitions on the upper and lower sides of the guide groove are provided with a first mounting groove and a second mounting groove that communicate with the guide groove. A first mounting roller is provided in the first mounting groove and a second mounting roller is provided in the second mounting groove. A strip component is wound on the first mounting roller and connected to the lower end of the slider, and a strip component is wound on the second mounting roller and connected to the upper end of the slider.

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