A positioning structure of a capacitor core

Abstract

The utility model requests protecting a kind of positioning structure of capacitor core, it includes at least one positioning block extending axially along capacitor core cylindrical outer surface, capacitor core is arranged in shell to form capacitor;The inner chamber bottom of shell is provided with bottom disc, the bottom surface of bottom disc and the cross section of capacitor core are adapted, and the outer periphery of bottom disc extends guide along upward obliquely outer direction, for guiding capacitor core into bottom disc, to limit the position of capacitor core axially, and the positioning groove corresponding to positioning block is set up on guide along, for the positioning block insertion, to limit the circumferential position of capacitor core.Positioning structure lets capacitor core be clamped into bottom disc, by the cooperation of positioning block and positioning groove, let capacitor core anti-rotation positioning reliable, by the cooperation of the positioning groove of guide along and the positioning block on capacitor core, fundamentally limit the circumferential degree of freedom of capacitor core, ensure that it does not occur rotation in installation and subsequent process.

Description

Technical Field

[0001] This utility model relates to the field of capacitor manufacturing technology, specifically to a positioning structure for a capacitor core. Background Technology

[0002] Capacitors are fundamental components widely used in electronic circuits, typically consisting of a capacitor core, a casing, and potting material. During assembly, the wound cylindrical capacitor core is placed into a metal or plastic casing, and then potted and sealed.

[0003] In existing technologies, capacitor cores are mostly standard cylinders with an annular gap between them and the inner wall of the cylindrical outer shell. During installation and potting, the following problems exist: First, the capacitor core is prone to rotation within the shell, causing its electrode leads to deviate from the predetermined outlet, making subsequent wiring difficult; second, the axial position of the core is also difficult to fix, and it may shift due to vibration during transportation and use. Although a method of using potting compound to fill and fix the core is employed, this method uses a lot of material, is costly, has a long curing time, and still cannot effectively solve the problem of initial circumferential rotation of the core. Therefore, how to position the capacitor core is the technical problem that this application aims to solve. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a positioning structure for capacitor cores, which uses positioning blocks and positioning grooves, along with a chassis, to limit the axial and circumferential positions of the capacitor cores.

[0005] The technical solution of this utility model is as follows: A positioning structure for a capacitor core includes at least one positioning block extending axially along the cylindrical outer surface of the capacitor core, the capacitor core being disposed within a housing to form a capacitor. The bottom of the inner cavity of the outer casing is provided with a chassis. The bottom surface of the chassis is adapted to the cross-section of the capacitor core. The outer periphery of the chassis extends obliquely upward and outward to guide the capacitor core into the chassis, thereby limiting the axial position of the capacitor core. The guide edge is provided with positioning grooves that correspond one-to-one with the positioning blocks for the positioning blocks to be inserted, thereby limiting the circumferential position of the capacitor core.

[0006] In summary, the above technical solution has the following beneficial effects: The positioning structure of this application allows the capacitor core to be inserted into the chassis, and the cooperation of the positioning block and the positioning groove ensures reliable anti-rotation positioning of the capacitor core. The cooperation between the positioning block on the capacitor core and the positioning groove on the guide edge fundamentally restricts the circumferential freedom of the capacitor core, ensuring that it will not rotate during installation and subsequent processes, allowing the electrode leads to be accurately aligned with the lead-out holes of the outer casing. The positioning groove and positioning block need to cooperate to insert the capacitor core, achieving a "foolproof" design, improving assembly efficiency, and reducing operational difficulty. Compared to overall potting, this utility model can significantly reduce the amount of potting compound used, lower costs, while avoiding the internal stress generated by the curing of large amounts of glue, and effectively preventing glue from flowing into sensitive areas such as the electrode leads, thus improving the long-term reliability of the product. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the longitudinal section of the capacitor core; Figure 2 This is a schematic diagram of the chassis cross-section; Figure 3 This is a schematic diagram of the positioning groove.

[0008] Reference numerals: 1. Capacitor core; 2. Outer shell; 10. Positioning block; 20. Chassis; 21. Guide edge; 22. Positioning groove; 221. Upper opening; 222. Lower opening. Detailed Implementation

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0010] like Figures 1-3 As shown, a positioning structure for a capacitor core 1 includes at least one positioning block 10 extending axially along the cylindrical outer surface of the capacitor core 1. The capacitor core 1 is disposed inside a housing 2 to form a capacitor. A base 20 is disposed at the bottom of the inner cavity of the housing 2. The bottom surface of the base 20 is adapted to the cross-section of the capacitor core 1. A guide edge 21 extends obliquely upward and outward from the periphery of the base 20 to guide the capacitor core 1 into the base 20, thereby limiting the axial position of the capacitor core 1. Positioning grooves 22 corresponding to the positioning blocks 10 are provided on the guide edge 21 for the positioning blocks 10 to be inserted, thereby limiting the circumferential position of the capacitor core 1.

[0011] The positioning structure of this application allows the capacitor core 1 to be inserted into the chassis 20. Through the cooperation of the positioning block 10 and the positioning groove 22, the capacitor core 1 is reliably positioned to prevent rotation. The circumferential freedom of the capacitor core 1 is fundamentally restricted by the cooperation of the positioning block 10 on the capacitor core 1 and the positioning groove 22 on the guide edge 21, ensuring that it will not rotate during installation and subsequent processes, allowing the electrode leads to be accurately aligned with the lead-out holes of the outer casing 2. The positioning groove 22 and the positioning block 10 need to cooperate to insert the capacitor core 1, achieving a "foolproof" design, improving assembly efficiency, and reducing operational difficulty. Compared to overall potting, this invention can significantly reduce the amount of potting compound used, lowering costs, while avoiding the internal stress generated by the curing of large amounts of glue, and effectively preventing glue from flowing into sensitive areas such as the electrode leads, thus improving the long-term reliability of the product.

[0012] The capacitor core 1 is a wound cylindrical structure, and several positioning blocks 10 extending along its axial direction are machined at the lower end of its outer surface.

[0013] In this embodiment, a support plate is provided between the top cover, which seals the housing, and the capacitor bank. Several conductive posts are distributed on the top cover, and conductive copper components are provided on the support plate. The conductive posts and the capacitor bank are connected through the conductive copper components to form a capacitor.

[0014] Furthermore, a bolt is provided at the center bottom of the chassis 20, and a threaded hole is opened on the bottom surface of the housing. The base is fixed to the threaded hole in the housing by the bolt. Preferably, a sealing gasket is provided between the base and the bottom surface of the housing, and a sealing sleeve is added between the bolt and the threaded hole to improve the sealing performance, thereby achieving a seal. Other necessary structures for capacitors are existing technologies and will not be described in detail in this application. After the bolts pass through from the bottom of the housing 2, they can be used to connect the base.

[0015] The guide edge 21 forms a 45-degree angle with the plane. The guide edge 21 is set around the chassis 20, and the longitudinal section of the guide edge 21 is inclined outward towards the chassis 20, preferably forming a 45-degree angle with the plane, so that the capacitor core 1 can slide into the chassis 20 along the guide edge 21. The area and shape of the chassis 20 are exactly the same as those of the capacitor core 1, thus playing a role in positioning and support.

[0016] The positioning groove 22 includes an upper opening 221 and a lower opening 222. The upper opening 221 is shaped like a trumpet, wider at the top and narrower at the bottom. The width of the lower opening 222 is the same as the width of the lower end of the upper opening 221.

[0017] The upper opening 221 of the positioning groove 22 has an arc-shaped edge. The upper end of the arc of the upper opening 221 is tangent to the upper edge of the guide edge 21, and the lower end of the arc of the upper opening 221 is tangent to the edge of the lower opening 222. The two ends of the trumpet-shaped upper opening 221 are tangent to each other, which makes it easier for the positioning block 10 to slide into the lower opening 222 along the arc-shaped upper opening 221, thereby limiting the circumferential position of the capacitor core 1.

[0018] The end of the positioning block 10 furthest from the capacitor core 1 is arc-shaped. The positioning block 10 needs to slide on the guide edge 21 and slide into the lower opening 222 through the upper opening 221. The arc-shaped setting of the end of the positioning block 10 furthest from the capacitor core 1 can better allow the capacitor core 1 to rotate and enter the positioning groove 22.

[0019] There are four positioning slots 22, and four corresponding positioning blocks 10. The four positioning blocks 10 and the positioning slots 22 are respectively set, one at every ninety degrees.

[0020] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A positioning structure for a capacitor core, characterized in that, Includes at least one positioning block (10) extending axially along the cylindrical outer surface of a capacitor core (1), the capacitor core (1) being disposed within a housing (2) to form a capacitor; The bottom of the inner cavity of the outer shell (2) is provided with a chassis (20). The bottom surface of the chassis (20) is adapted to the cross-section of the capacitor core (1). The outer periphery of the chassis (20) extends obliquely outward to form a guide edge (21) for guiding the capacitor core (1) into the chassis (20), thereby limiting the axial position of the capacitor core (1). The guide edge (21) is provided with positioning grooves (22) that correspond one-to-one with the positioning blocks (10) for the positioning blocks (10) to be inserted, thereby limiting the circumferential position of the capacitor core (1).

2. The positioning structure of a capacitor core according to claim 1, characterized in that, The angle between the guide edge (21) and the plane is 45 degrees.

3. The positioning structure of a capacitor core according to claim 2, characterized in that, The positioning groove (22) includes an upper opening (221) and a lower opening (222). The upper opening (221) is shaped like a trumpet, wider at the top and narrower at the bottom. The width of the lower opening (222) is the same as the width of the lower end of the upper opening (221).

4. The positioning structure of a capacitor core according to claim 3, characterized in that, The upper edge of the positioning groove (22) is arc-shaped, the upper arc of the upper opening (221) is tangent to the upper edge of the guide edge (21), and the lower arc of the upper opening (221) is tangent to the edge of the lower opening (222).

5. The positioning structure of a capacitor core according to claim 1, characterized in that, The positioning block (10) is arc-shaped at the end away from the capacitor core (1).

6. The positioning structure of a capacitor core according to claim 1, characterized in that, The positioning slots (22) are provided in four places, and the positioning blocks (10) are provided in four places accordingly.

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