Capacitor convenient for limiting core
By designing the interference assembly between the first pin and the housing groove in the capacitor, the problem of whether the core is floating or unable to float during the filling process is solved, and the stable positioning of the core and the stability of the capacitor performance are achieved.
Patent Information
- Application Number
- CN202421064177.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-15
AI Technical Summary
During the manufacturing process of capacitors, the buoyancy of the filling material on the core causes the core to float, affecting the moisture-proof effect and appearance size, or the core cannot float, resulting in the bottom potting material being too thin, affecting the performance of the capacitor.
By designing an interference assembly between the first pin and the housing groove in the capacitor, the core positioning is achieved, so that the bottom end of the core is fixed from the bottom wall of the housing, and the uneven thickness of the filling material is avoided to affect performance.
Ensure the stable positioning of the core, avoid performance problems caused by uneven thickness of the filling material, and make the capacitor performance more stable.
Smart Images
Figure CN222619569U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor which is convenient for limiting the position of a core. Background Art
[0002] During the manufacturing process of the capacitor, the core needs to be inserted into the shell and then potted with liquid potting material. After curing, isolation protection is formed. However, during the potting process, the liquid potting material will produce a buoyancy on the core that is greater than the core's gravity, causing the core to float, shortening the distance between the core and the surface of the potting material, resulting in a decrease in moisture-proof effect and appearance dimensions exceeding manufacturing requirements. In addition, if the buoyancy of the potting material on the core is less than the core's own gravity, the core cannot float, and the bottom end of the core fits against the bottom wall of the shell, resulting in a thinner bottom potting material, affecting the performance of the capacitor. Utility Model Content
[0003] In order to solve the technical problems existing in the background technology, the utility model provides a capacitor which is convenient for limiting the position of the core.
[0004] The utility model provides a capacitor which is convenient for limiting the position of a core, comprising a shell, a core, a first pin and a second pin. The core is located in the shell, the first pin passes through a through hole on the core and is relatively fixed to the core in an axial direction thereof, the first pin and the second pin are electrically connected to two ends of the core respectively, a groove is provided in the middle of the bottom wall of the shell, and the bottom of the first pin is interference-fitted with the groove.
[0005] Preferably, the height between the bottom end of the first pin and the bottom end of the core is greater than the height of the groove.
[0006] Preferably, an outer wall of the first pin is provided with an insulating block which can be interference-fitted with the through hole on the core.
[0007] Preferably, a through groove penetrating through both ends of the top and bottom of the insulating block is provided to connect two spaces where the through holes are respectively located above and below the insulating block.
[0008] Preferably, the first pin is sequentially mounted with a first limit block and a second limit block in the length direction thereof, and the core is located between the first limit block and the second limit block to relatively fix the core and the first pin in the axial direction thereof.
[0009] Preferably, the first limit block located below the core is made of conductive material and fits with the bottom end surface of the core to electrically connect the core and the first pin, and the second limit block located above the core is made of insulating material.
[0010] Preferably, the middle portion of the bottom end of the shell has an upwardly protruding annular portion, and the annular portion encloses to form a groove.
[0011] The capacitor proposed by the utility model positions the core through the interference fit between the first pin and the housing groove, so that the bottom end of the core is at a certain height from the bottom wall of the housing, and the top end of the core is at a certain distance from the top surface of the filling material, thereby avoiding the performance of the capacitor being affected by the uneven thickness of the filling material, and making the performance of the capacitor more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic cross-sectional view of a first structure of a capacitor for facilitating positioning of a core, as proposed by the utility model;
[0013] Figure 2 This is a second structural cross-sectional schematic diagram of a capacitor proposed by the utility model for facilitating the positioning of a core. DETAILED DESCRIPTION
[0014] Reference Figure 1-2 The utility model proposes a capacitor which is convenient for limiting the core, comprising a shell 1, a core 2, a first pin 3, and a second pin 4. The core 2 is located in the shell 1, the first pin 3 passes through a through hole 21 on the core 2 and is relatively fixed to the core 2 in its axial direction, the first pin 3 and the second pin 4 are electrically connected to the two ends of the core 2 respectively, a groove 11 is opened in the middle of the bottom wall of the shell 1, and the bottom of the first pin 3 is interference-fitted with the groove 11.
[0015] During assembly, the core 2 is placed into the shell 1 along its axial direction, and the bottom end of the first pin 3 relatively fixed to the shell 1 in its axial direction is interference-fitted with the groove 11 at the bottom of the shell 1. Since the first pin 3 and the core 2 are relatively fixed in their axial directions, the friction between the first pin 3 and the groove wall of the groove 11 relatively fixes the shell 1 and the core 2 in their plug-in direction, thereby preventing the core 2 from floating up due to the buoyancy of the filling material and causing it to be misplaced when the capacitor is filled later.
[0016] It should be further explained that the height between the bottom end of the first pin 3 and the bottom end of the core 2 is greater than the height of the groove 11, so as to avoid the core 2 from contacting the bottom wall of the housing 1 and reserve a filling space.
[0017] In order to achieve the relative fixation of the first pin 3 and the core 2 in the axial direction thereof, the outer wall of the first pin 3 in the present invention has an insulating block 31 which can be inserted into the through hole 21 on the core 2 by interference, and the first pin 3 and the core 2 are relatively fixed by the friction between the insulating block 31 and the wall of the through hole 21 of the core 2. Figure 1 .
[0018] There is a filling space between the outer wall of the core 2 and the inner wall of the shell 1. A through groove penetrating the top and bottom ends is opened on the insulating block 31 to connect the two spaces located at the upper and lower ends of the through hole 21 of the insulating block 31 to facilitate the flow of filling materials.
[0019] In addition to the above embodiments, the present invention also proposes another implementation method, in which a first stop block 32 and a second stop block 33 are sequentially installed on the first pin 3 in its length direction, and the core 2 is located between the first stop block 32 and the second stop block 33 to relatively fix the core 2 and the first pin 3 in the axial direction thereof. Figure 2 .
[0020] The first limiting block 32 and the second limiting block 33 cannot completely close the through hole 21, so that the through hole 21 is connected with the external filling space.
[0021] The first limit block 32 located below the core 2 is made of conductive material and fits with the bottom end surface of the core 2 to electrically connect the core 2 and the first pin 3 . The second limit block 33 located above the core 2 is made of insulating material.
[0022] In the above embodiment, the middle part of the bottom end of the shell 1 has an upwardly protruding annular portion, and the annular portion encloses a groove 11. The height between the bottom end of the core 2 and the bottom wall of the shell 1 is increased by the provision of the annular portion, thereby expanding the filling thickness and improving the stability and thermal conductivity of the capacitor.
[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A capacitor that is convenient for limiting the core, characterized in that: The invention comprises a shell (1), a core (2), a first pin (3), and a second pin (4); the core (2) is located in the shell (1); the first pin (3) passes through a through hole (21) on the core (2) and is relatively fixed to the core (2) in the axial direction thereof; the first pin (3) and the second pin (4) are respectively electrically connected to two ends of the core (2); a groove (11) is provided in the middle of the bottom wall of the shell (1); and the bottom of the first pin (3) is interference-fitted with the groove (11).
2. The capacitor for facilitating the positioning of the core according to claim 1, characterized in that: The height between the bottom end of the first pin (3) and the bottom end of the core (2) is greater than the height of the groove (11).
3. The capacitor for facilitating the positioning of the core according to claim 2, characterized in that: An insulating block (31) is provided on the outer wall of the first pin (3) and can be inserted into the through hole (21) on the core (2) by interference.
4. The capacitor for facilitating the positioning of the core according to claim 3, characterized in that: The insulating block (31) is provided with a through groove penetrating through both ends of the top and bottom thereof to connect the two spaces of the through hole (21) located respectively above and below the insulating block (31).
5. The capacitor for facilitating the positioning of the core according to claim 2, characterized in that: The first pin (3) is sequentially mounted with a first limiting block (32) and a second limiting block (33) in the length direction thereof, and the core (2) is located between the first limiting block (32) and the second limiting block (33) so as to relatively fix the core (2) and the first pin (3) in the axial direction thereof.
6. The capacitor for facilitating the positioning of the core according to claim 5, characterized in that: The first limit block (32) located below the core (2) is made of a conductive material and fits with the bottom end surface of the core (2) to electrically connect the core (2) and the first pin (3), and the second limit block (33) located above the core (2) is made of an insulating material.
7. The capacitor for facilitating the positioning of the core according to claim 1, characterized in that: The middle part of the bottom end of the housing (1) has an upwardly protruding annular portion, which encloses a groove (11).