CN216450515U - Capacitor and unshelling-proof structure thereof - Google Patents
Capacitor and unshelling-proof structure thereof Download PDFInfo
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- CN216450515U CN216450515U CN202122522603.6U CN202122522603U CN216450515U CN 216450515 U CN216450515 U CN 216450515U CN 202122522603 U CN202122522603 U CN 202122522603U CN 216450515 U CN216450515 U CN 216450515U
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- accommodating cavity
- side wall
- positioning sleeve
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Abstract
The utility model discloses a capacitor and an anti-shelling structure thereof, wherein the anti-shelling structure comprises a metal shell and an insulating positioning sleeve; the metal shell forms an accommodating cavity for accommodating the core, the upper end of the accommodating cavity is provided with an opening, the opening position at the upper end of the accommodating cavity forms a contraction part, and the inner diameter of the contraction part is smaller than that of other parts of the accommodating cavity; the appearance of the insulating positioning sleeve is matched with that of the metal shell, the insulating positioning sleeve is partially embedded into the inner side wall of the accommodating cavity of the metal shell, and a groove for embedding the contraction part is formed in the outer side wall of the insulating positioning sleeve. The utility model realizes physical anti-falling through the matching of the contraction part and the groove, so that the anti-falling effect is good and the cost is lower.
Description
Technical Field
The utility model relates to the technical field of capacitors, in particular to a capacitor and an anti-shelling structure thereof.
Background
One common type of capacitor is formed by using an organic polymer film as a dielectric, a metal plating layer on the film as an electrode, and two films are stacked to form a capacitance. The film is wound into a cylindrical core, alloy is sprayed at two ends of the core to form a gold spraying layer, and the gold spraying layer is connected with an external leading-out terminal through a metal connecting piece. The core is arranged in a shell, and the shell is generally a spliced body of a plastic piece and a metal shell. Resin is filled between the core and the shell.
The capacitor is mainly applied to the fields of solar power generation, wind power generation, industrial control and the like, and is in a relatively severe environment, large in environment temperature difference and large in amplitude and vibration frequency. The capacitor core and the shell are fixed by resin encapsulation, and because the temperature of the installation environment is high, the resin and the shell can expand with heat and contract with cold, and the difference between the thermal expansion coefficients of the resin and the shell material is large. The combination between the resin and the metal shell is poor, and the shelling phenomenon between the resin and the metal shell is easily caused in the long-term use process, so that the performance of the capacitor is finally damaged.
In order to prevent the occurrence of the shelling phenomenon between the resin and the metal shell, in the prior art, firstly, the plastic piece and the metal shell are designed to be in interference fit, and the plastic piece and the metal shell are assembled in interference fit and then are encapsulated and fixed by the resin; and the publication No. CN202711955U discloses that the anti-falling structure is implemented by passing through a straight-tube aluminum shell with a positioning thimble, the thimble needs to be processed on the aluminum shell, the manufacturing cost is high, and the integral cost of the capacitor is increased.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide an unshelling prevention structure for capacitors, which realizes physical unshelling prevention by matching a contraction portion with a groove, so that the unshelling prevention effect is good and the cost is low.
A second object of the present invention is to provide a capacitor.
In order to achieve the above object, a first aspect of the present invention provides an unshelling-preventing structure for a capacitor, including:
the metal shell forms an accommodating cavity for accommodating the core, the upper end of the accommodating cavity is provided with an opening, the opening position of the upper end of the accommodating cavity forms a contraction part, and the inner diameter of the contraction part is smaller than that of other parts of the accommodating cavity;
the insulating locating sleeve is matched with the metal shell in shape, the insulating locating sleeve is partially embedded into the inner side wall of the accommodating cavity of the metal shell, and a groove for embedding the contraction part is formed in the outer side wall of the insulating locating sleeve.
According to the unshelling-preventing structure of the capacitor, the groove is formed in the outer side wall of the insulating positioning sleeve, the opening position of the upper end of the containing cavity of the metal shell forms the contraction part, and when the insulating positioning sleeve is partially embedded into the inner side wall of the containing cavity of the metal shell, the contraction part is embedded into the groove of the insulating positioning sleeve, so that the metal shell and the insulating positioning sleeve are firmly positioned, namely physical unshelling prevention is realized through the matching of the contraction part and the groove, and the unshelling-preventing effect is good; simultaneously, because insulating position sleeve material can be plastics, through injection moulding for it is comparatively easy and the cost is lower to set up the recess on the insulating position sleeve lateral wall.
In addition, the unshelling-proof structure of the capacitor according to the above embodiment of the present invention may further have the following additional technical features:
optionally, the insulating positioning sleeve is embedded in the middle of the inner side wall of the accommodating cavity of the metal shell and is in interference fit with the accommodating cavity of the metal shell.
Optionally, the contraction part at the opening position of the upper end of the accommodating cavity is formed by pressing the contraction part into a groove on the outer side wall of the insulating positioning sleeve through rolling groove machining.
Specifically, the constricted portion is composed of an inclined section and a vertical section, the inclined section connects the vertical section and the metal shell, and the inclined section is inclined toward the center of the metal shell.
Optionally, the insulating positioning sleeve is made of plastic.
Optionally, the metal housing is made of aluminum or an aluminum alloy.
Optionally, the metal housing is cylindrical or elliptic cylindrical in shape.
Optionally, the thickness of the upper side wall of the groove is greater than that of the lower side wall of the groove, and when the insulating positioning sleeve and the metal shell are assembled, the outer diameter of the insulating positioning sleeve and the outer diameter of the metal shell are matched.
In order to achieve the above object, a second aspect of the present invention provides a capacitor, including the anti-shelling structure.
According to the embodiment of the utility model, the capacitor comprises an anti-shelling structure, because the outer side wall of the insulating positioning sleeve is provided with the groove, the opening position at the upper end of the accommodating cavity of the metal shell forms the contraction part, and when the insulating positioning sleeve is partially embedded into the inner side wall of the accommodating cavity of the metal shell, the contraction part is embedded into the groove of the insulating positioning sleeve, so that the metal shell and the insulating positioning sleeve are firmly positioned, namely, physical anti-dropping is realized through the matching of the contraction part and the groove, and the anti-dropping effect is good; simultaneously, because insulating position sleeve material can be plastics, through injection moulding for it is comparatively easy and the cost is lower to set up the recess on the insulating position sleeve lateral wall.
Drawings
FIG. 1 is a schematic structural diagram according to an embodiment of the present invention;
FIG. 2 is a side view of an embodiment in accordance with the utility model;
FIG. 3 is a partial enlarged view of FIG. 2A;
FIG. 4 is a schematic diagram of the structure before the roll-groove process according to an embodiment of the present invention;
fig. 5 is a partially enlarged view of fig. 4B.
Description of the reference symbols
Metal shell 1 accommodating cavity 11
The inclined section 121 of the constriction 12
A lower sidewall 212.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
According to the utility model, the groove is formed in the outer side wall of the insulating positioning sleeve, the opening position at the upper end of the accommodating cavity of the metal shell forms the contraction part, and when the insulating positioning sleeve is partially embedded into the inner side wall of the accommodating cavity of the metal shell, the contraction part is embedded into the groove of the insulating positioning sleeve, so that the metal shell and the insulating positioning sleeve are firmly positioned, namely, physical anti-falling is realized through the matching of the contraction part and the groove, and the anti-falling effect is good; simultaneously, because insulating position sleeve material can be plastics, through injection moulding for it is comparatively easy and the cost is lower to set up the recess on the insulating position sleeve lateral wall.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1 to 5, an unshelling-proof structure of a capacitor according to an embodiment of the present invention includes a metal housing 1 and an insulating positioning sleeve 2.
Metal casing 1 forms the chamber 11 that holds the core, holds 11 upper ends of chamber and has the opening, holds 11 upper end open position and forms constriction 12, and the internal diameter of constriction 12 is less than the internal diameter that holds 11 other positions in chamber.
Alternatively, the constricted portion 12 at the upper end opening position of the accommodation chamber 11 is formed by a rolling groove process. Specifically, as shown in fig. 3, the constricted portion 12 is composed of an inclined section 121 and a vertical section 122, the inclined section 121 connects the vertical section 122 and the metal shell 1, and the inclined section 121 is inclined toward the center of the metal shell 1.
Alternatively, the material of the metal shell 1 is aluminum or aluminum alloy, and the metal shell 1 is a thin-walled shell formed by cold extrusion. The metal case 1 has a cylindrical or elliptic cylindrical shape or the like.
The appearance of the insulating locating sleeve 2 is matched with the metal shell 1, the insulating locating sleeve 2 is partially embedded into the inner side wall of the accommodating cavity 11 of the metal shell 1, and a groove 21 for embedding the contraction part 12 is formed in the outer side wall of the insulating locating sleeve 2.
Optionally, the insulating positioning sleeve 2 is embedded in the middle part of the inner side wall of the accommodating cavity 11 of the metal shell 1 and is in interference fit with the accommodating cavity 11 of the metal shell 1, so that the insulating positioning sleeve 2 and the metal shell 1 are stably assembled.
Optionally, the insulating positioning sleeve 2 is made of plastic, and is formed by injection molding, so that the groove 21 is easily formed in the outer side wall of the insulating positioning sleeve 2, and the cost is low. The groove 21 on the outer side wall of the insulating positioning sleeve 2 is used for pressing the upper end of the accommodating cavity 11 through a rolling groove process to form a contraction part 12.
Optionally, the thickness of the upper sidewall 211 of the groove 21 is greater than that of the lower sidewall 212, and when the insulating positioning sleeve 2 is assembled with the metal shell 1, the outer diameters of the two are matched, so that the outer surface of the metal shell 1 is substantially consistent with the outer surface of the insulating positioning sleeve 2.
As shown in fig. 4 and 5, in the production process, when the metal shell 1 is not rolled, the insulating positioning sleeve 2 is inserted from the upper end opening of the accommodating cavity 11 of the metal shell 1, so that the upper side wall 211 of the groove 21 of the insulating positioning sleeve 2 is flush with the end surface of the opening of the metal shell 1, and the whole or a part of the inserted part is in interference fit. As shown in fig. 2 and 3, when the metal shell 1 is subjected to the grooving process, the mouth portion 12 of the metal shell 1 is deformed, and the metal shell 1 is partially rolled into the groove 21 of the insulating bush 2. The mouth of the metal shell 1 is firmly clamped in the groove 21 of the insulating positioning sleeve 2 to form physical anti-dropping.
According to the unshelling-proof structure of the capacitor, the groove 21 is formed in the outer side wall of the insulating positioning sleeve 2, the contraction portion 12 is formed at the opening position of the upper end of the accommodating cavity 11 of the metal shell 1, and when the insulating positioning sleeve 2 is partially embedded into the inner side wall of the accommodating cavity 11 of the metal shell 1, the contraction portion 12 is embedded into the groove 21 of the insulating positioning sleeve 2, so that the metal shell 1 and the insulating positioning sleeve 2 are firmly positioned, namely physical unshelling-proof is achieved through the matching of the contraction portion 12 and the groove 21, and the unshelling-proof effect is good; meanwhile, the insulating positioning sleeve 2 is made of plastic and is formed through injection molding, so that the groove 21 is formed in the outer side wall of the insulating positioning sleeve 2 easily, and the cost is low.
As shown in fig. 1 to 5, a second aspect of the present invention provides a capacitor, including a shelling-proof structure, where the shelling-proof structure includes a metal shell 1 and an insulating positioning sleeve 2; the metal shell 1 forms an accommodating cavity 11 for accommodating the core, the upper end of the accommodating cavity 11 is provided with an opening, the opening position of the upper end of the accommodating cavity 11 forms a contraction part 12, and the inner diameter of the contraction part 12 is smaller than that of other parts of the accommodating cavity 11; the appearance of the insulating locating sleeve 2 is matched with the metal shell 1, the insulating locating sleeve 2 is partially embedded into the inner side wall of the accommodating cavity 11 of the metal shell 1, and a groove 21 for embedding the contraction part 12 is formed in the outer side wall of the insulating locating sleeve 2.
The capacitor comprises an unshelling-proof structure, wherein a groove 21 is formed in the outer side wall of an insulating positioning sleeve 2, a contraction part 12 is formed at the opening position of the upper end of an accommodating cavity 11 of a metal shell 1, and when part of the insulating positioning sleeve 2 is embedded into the inner side wall of the accommodating cavity 11 of the metal shell 1, the contraction part 12 is embedded into the groove 21 of the insulating positioning sleeve 2, so that the metal shell 1 and the insulating positioning sleeve 2 are firmly positioned, namely, physical anti-falling is realized through the matching of the contraction part 12 and the groove 21, and the anti-falling effect is good; meanwhile, the insulating positioning sleeve 2 is made of plastic and is formed through injection molding, so that the groove 21 is formed in the outer side wall of the insulating positioning sleeve 2 easily, and the cost is low.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. An unshelling prevention structure of a capacitor, comprising:
the metal shell forms an accommodating cavity for accommodating the core, the upper end of the accommodating cavity is provided with an opening, the opening position of the upper end of the accommodating cavity forms a contraction part, and the inner diameter of the contraction part is smaller than that of other parts of the accommodating cavity;
the insulating locating sleeve is matched with the metal shell in shape, the insulating locating sleeve is partially embedded into the inner side wall of the accommodating cavity of the metal shell, and a groove for embedding the contraction part is formed in the outer side wall of the insulating locating sleeve.
2. A peel-preventing structure for capacitors as claimed in claim 1, wherein the insulating positioning sleeve is inserted into the inner wall of the receiving cavity of the metal case and is in interference fit with the receiving cavity of the metal case.
3. A peel-preventing structure for capacitors as claimed in claim 1, wherein the constricted portion at the position of the opening at the upper end of the receiving chamber is formed by rolling a groove formed in the outer side wall of the insulating positioning sleeve.
4. A shelling structure for capacitors as claimed in claim 3, wherein said constricted portion is composed of an inclined portion and a vertical portion, said inclined portion connecting said vertical portion and said metal case, said inclined portion being inclined toward a center of said metal case.
5. A peel-preventing structure for capacitors as claimed in claim 1, wherein the insulating spacer is made of plastic.
6. A peel-preventing structure for capacitors as claimed in claim 1, wherein the metal case is made of aluminum or an aluminum alloy.
7. A shelling prevention structure for capacitor as claimed in claim 1, wherein said metal case has a cylindrical or elliptic cylindrical shape.
8. A peel-preventing structure for capacitors as claimed in claim 1, wherein the thickness of the upper side wall of said recess is larger than that of the lower side wall, and the outer diameter dimensions of said insulating retainer and said metal case are matched when they are assembled.
9. A capacitor comprising the hulling resistant structure as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122522603.6U CN216450515U (en) | 2021-10-19 | 2021-10-19 | Capacitor and unshelling-proof structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122522603.6U CN216450515U (en) | 2021-10-19 | 2021-10-19 | Capacitor and unshelling-proof structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216450515U true CN216450515U (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122522603.6U Active CN216450515U (en) | 2021-10-19 | 2021-10-19 | Capacitor and unshelling-proof structure thereof |
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| Country | Link |
|---|---|
| CN (1) | CN216450515U (en) |
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- 2021-10-19 CN CN202122522603.6U patent/CN216450515U/en active Active
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