Capacitor

Abstract

The utility model discloses a capacitor, which can ensure that the thickness of insulating filler is uniform, reduce the generation of air holes and air bubbles, remarkably solve the problems that the thickness of the capacitor is not uniform and the flow is difficult in the process of injecting the insulating filler, and ensure the electrical insulation performance of the capacitor. The capacitor comprises a capacitor shell, a core group, an insulation isolation layer, a centering positioning piece, a conductive terminal and an insulation filling material. The core group is arranged in the capacitor shell; the insulation isolation layer wraps the side surface and the bottom surface of the core group, and the insulation isolation layer is provided with a hollow part; centering positioning pieces are arranged between the side surface and the bottom surface of the insulating isolation layer and the inner wall of the capacitor shell; the opposite surfaces of the centering positioning piece abut against the outer wall of the insulation isolation layer and the inner wall of the capacitor shell respectively, and the position of the centering positioning piece is not overlapped with the hollow part. The conductive terminal penetrates through the top of the capacitor shell and is connected with the core group; and the insulating filler is poured in the capacitor shell.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor capable of ensuring that a core group is centrally installed. Background Art

[0002] As a basic component, capacitors are widely used in power electronic equipment. Their main structures include shell, core group, conductive terminals, insulating isolation layer, shell cover and insulating filler. Among them, the insulating filler has the following functions:

[0003] (1) Prevent the core group from oxidation or moisture;

[0004] (2) Filling the gap between the outer shell, the insulating isolation layer and the core group, it can fix the core group, reduce vibration, and prevent the core group from being mechanically damaged;

[0005] (3) As an electrical insulating material, it cooperates with the insulating isolation layer wrapped around the core group to ensure electrical insulation between the core group and the outer shell, prevent leakage, and ensure the safe operation of the capacitor.

[0006] The existing capacitor structure design is prone to uneven thickness of the insulating filler on each side of the capacitor. For example, ① the thickness of the insulating filler on a certain side is too large, while the thickness of the insulating filler on other sides and the bottom is too small or even non-existent; ② the existing structural design leads to poor fluidity of the insulating filler, and bubbles are prone to appear inside the insulating filler. The above defects will lead to performance risks in the capacitor's impact resistance and electrical safety, thereby affecting the long-term safe operation of the capacitor and causing early failure. Utility Model Content

[0007] The purpose of the utility model is to provide a capacitor that solves the problems existing in the prior art, can ensure the uniform thickness of the insulating filler and reduce the generation of pores and bubbles, significantly solve the problems of uneven thickness and difficult flow generated in the process of injecting insulating filler into the capacitor, and ensure the electrical insulation performance of the capacitor.

[0008] In order to achieve the above purpose, the solution of the utility model is:

[0009] A capacitor comprises a capacitor housing, a core group, an insulating isolation layer, a centering piece, a conductive terminal and an insulating filler; the core group is arranged in the capacitor housing; the insulating isolation layer is coated on the side and bottom surfaces of the core group, and the insulating isolation layer is provided with a hollow portion; a centering piece is arranged between the side and bottom surfaces of the insulating isolation layer and the inner wall of the capacitor housing; the opposite surfaces of the centering piece respectively abut against the outer wall of the insulating isolation layer and the inner wall of the capacitor housing, and the position of the centering piece does not overlap with the hollow portion; the conductive terminal is passed through the top of the capacitor housing and connected to the core group; the insulating filler is poured into the capacitor housing.

[0010] The hollow portion is arranged on the side of the insulating isolation layer.

[0011] Preferably, the hollow portion is an elongated hole and is arranged along the height direction of the side surface of the insulating isolation layer.

[0012] The capacitor casing comprises a casing body and a casing cover; the casing body is provided with a slot-shaped structure for the core group, the insulating isolation layer and the centering positioning piece to cooperate with, the casing cover is tightly covered at the opening of the slot-shaped structure, and is provided with a through hole for the conductive terminal to pass through.

[0013] The centering positioning piece includes a side positioning piece located between the side surface of the insulating isolation layer and the capacitor housing, and a bottom positioning piece located between the bottom surface of the insulating isolation layer and the capacitor housing.

[0014] Preferably, the side positioning members and the bottom positioning members are both long strip-shaped objects, and are respectively arranged along the height direction of the side surface and the length direction of the bottom surface of the insulating isolation layer.

[0015] Preferably, at least two bottom surface positioning members are provided.

[0016] Preferably, the bottom surface positioning member is fixedly connected to the bottom surface of the insulating isolation layer.

[0017] After adopting the above technical solution, the utility model has the following technical effects:

[0018] The utility model fixes the relative positions of the insulating isolation layer, the core group and the capacitor shell by a plurality of centering positioning pieces between the insulating isolation layer and the capacitor shell, so that the core group covered by the insulating isolation layer can be centrally installed in the capacitor shell when the capacitor is installed, and the thickness of the insulating filler between the core group and the capacitor shell can be uniform when pouring the insulating filler, so that the insulation strength of each side of the capacitor can meet the design requirements; the hollow part opened on the insulating isolation layer can ensure that the insulating filler has good fluidity during pouring, and avoids the occurrence of insulation hazards such as large pores and bubbles, and at the same time, the insulating filler filled in the hollow part can achieve mutual limitation between the insulating filler and the insulating isolation layer after solidification, thereby improving the combination of the two and further improving the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of a specific embodiment of the utility model;

[0020] Figure 2 It is an exploded view of a specific embodiment of the utility model;

[0021] Figure 3 It is a front view of a specific embodiment of the utility model;

[0022] Figure 4 A top view of a specific embodiment of the utility model;

[0023] Figure 5 for Figure 3 Sectional view in the AA direction;

[0024] Figure 6 for Figure 3 Cross-sectional view in the BB direction;

[0025] Figure 7 for Figure 4 Cross-sectional view in CC direction;

[0026] Description of Figure Numbers:

[0027] 1-capacitor housing; 11-housing; 111-groove structure; 12-housing cover; 121-perforation;

[0028] 2-core group;

[0029] 3-insulating isolation layer; 31-hollow portion;

[0030] 4-center positioning piece; 41-side positioning piece; 42-bottom positioning piece;

[0031] 5-conductive terminal;

[0032] 6-Insulation filler. DETAILED DESCRIPTION

[0033] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0034] refer to Figures 1 to 7 As shown, the utility model discloses a capacitor, comprising a capacitor housing 1, a core group 2, an insulating isolation layer 3, a centering positioning member 4, a conductive terminal 5 and an insulating filler 6;

[0035] The core group 2 is arranged in the capacitor housing 1;

[0036] The insulating isolation layer 3 is coated on the side and bottom surfaces of the core group 2, and the insulating isolation layer 3 is provided with a hollow portion 31, and the hollow portion 31 connects the outer wall and the inner wall of the insulating isolation layer 3;

[0037] A centering member 4 is disposed between the side surface and the bottom surface of the insulating isolation layer 3 and the inner wall of the capacitor housing 1; the opposite surfaces of the centering member 4 abut against the outer wall of the insulating isolation layer 3 and the inner wall of the capacitor housing 1, respectively, and the position of the centering member 4 does not overlap with the hollow portion 31;

[0038] The conductive terminal 5 is disposed on the top of the capacitor housing 1 and connected to the core group 2;

[0039] The insulating filler 6 is poured into the capacitor housing 1 .

[0040] Through the above scheme, the utility model fixes the relative positions of the insulating isolation layer 3, the core group 2 and the capacitor housing 1 through a plurality of centering positioning members 4 between the insulating isolation layer 3 and the capacitor housing 1, so that the core group 2 covered by the insulating isolation layer 3 can be centrally installed in the capacitor housing 1 when the capacitor is installed, and the thickness of the insulating filler 6 between the core group 2 and the capacitor housing 1 can be made uniform when pouring the insulating filler 6, and the insulation strength of each side of the capacitor can meet the design requirements; the hollow portion 31 opened on the insulating isolation layer 3 can ensure that the insulating filler 6 has good fluidity during pouring, avoiding the occurrence of large pores, bubbles and other insulation hazards, and at the same time, the insulating filler 6 filled in the hollow portion 31 can achieve mutual limitation between the insulating filler 6 and the insulating isolation layer 3 after solidification, thereby improving the bonding between the two and improving the quality of the product.

[0041] Specific embodiments of the present utility model are shown below.

[0042] The material properties, external dimensions and the number of the insulating isolation layer 3 and the centering positioning member 4 can be designed according to actual product requirements and are not fixed solutions.

[0043] The hollow portion 31 is arranged on the side of the insulating isolation layer 3. Relatively speaking, the area of ​​the side of the insulating isolation layer 3 is relatively large, and because the central positioning member 4 is arranged, the distance between it and the capacitor housing 1 is relatively large, that is, the insulation distance is sufficient and the insulation performance is stable, and it is more appropriate to open the flow port (i.e., the hollow portion 31) for the insulating filler 6 here.

[0044] Furthermore, the hollow portion 31 is a long hole and is arranged along the height direction of the side surface of the insulating isolation layer 3 .

[0045] The capacitor housing 1 comprises a housing shell 11 and a housing cover 12; the housing shell 11 is provided with a groove structure 111 for cooperating with the core group 2, the insulating isolation layer 3 and the centering positioning member 4, and the housing cover 12 is tightly covered at the opening of the groove structure 111 and is provided with a through hole 121 for the conductive terminal 5 to pass through.

[0046] The centering positioning member 4 includes a side positioning member 41 located between the side of the insulating isolation layer 3 and the capacitor housing 1, and a bottom positioning member 42 located between the bottom of the insulating isolation layer 3 and the capacitor housing 1. According to different product designs, the shapes, sizes, etc. of the side positioning member 41 and the bottom positioning member 42 can be the same or different.

[0047] Furthermore, the side positioning members 41 and the bottom positioning members 42 are both long strip-shaped objects, and are respectively arranged along the height direction of the side surface and the length direction of the bottom surface of the insulating isolation layer 3 .

[0048] Secondly, according to the width of the side of the insulating isolation layer 3, one or two, or more side positioning members 41 are provided; at least two bottom positioning members 42 are provided to ensure that the core group 2 coated with the insulating isolation layer 3 is not easy to shake after being placed in the capacitor housing 1, and it is more convenient to insert the side positioning members 41 later.

[0049] In addition, the bottom surface positioning member 42 is fixedly connected to the bottom surface of the insulating isolation layer 3 by gluing or other methods, so that the bottom surface positioning member 42 is relatively fixed to the insulating isolation layer 3, which is more convenient when installing the capacitor.

[0050] The installation process of the utility model is:

[0051] ① Wrap the insulating isolation layer 3 on the surface of the core group 2;

[0052] ② Place the bottom surface positioning member 42 on the bottom surface of the insulating isolation layer 3 and fix it;

[0053] ③ The whole is placed in the capacitor housing 1, and a side positioning piece 41 is inserted between the side of the insulating isolation layer 3 and the capacitor housing 1 so that the core group 2 is centered.

[0054] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A capacitor, characterized in that: It includes a capacitor housing, a core group, an insulating isolation layer, a centering positioning piece, a conductive terminal and an insulating filler; The core group is arranged in the capacitor housing; The insulating isolation layer is coated on the side and bottom surfaces of the core group, and the insulating isolation layer is provided with a hollow portion; A centering piece is disposed between the side surface and the bottom surface of the insulating isolation layer and the inner wall of the capacitor housing; the opposite surfaces of the centering piece abut against the outer wall of the insulating isolation layer and the inner wall of the capacitor housing respectively, and the position of the centering piece does not overlap with the hollow portion; The conductive terminal is disposed on the top of the capacitor housing and connected to the core group; The insulating filler is poured into the capacitor housing.

2. The capacitor according to claim 1, wherein: The hollow portion is arranged on the side of the insulating isolation layer.

3. The capacitor according to claim 2, wherein: The hollow portion is a long hole and is arranged along the height direction of the side surface of the insulating isolation layer.

4. The capacitor according to claim 1, wherein: The capacitor casing comprises a casing body and a casing cover; the casing body is provided with a slot-shaped structure for the core group, the insulating isolation layer and the centering positioning piece to cooperate with, the casing cover is tightly covered at the opening of the slot-shaped structure, and is provided with a through hole for the conductive terminal to pass through.

5. The capacitor according to claim 1, wherein: The centering positioning piece includes a side positioning piece located between the side surface of the insulating isolation layer and the capacitor housing, and a bottom positioning piece located between the bottom surface of the insulating isolation layer and the capacitor housing.

6. The capacitor according to claim 5, wherein: The side positioning pieces and the bottom positioning pieces are both long strip-shaped objects, and are respectively arranged along the height direction of the side surface and the length direction of the bottom surface of the insulating isolation layer.

7. The capacitor according to claim 6, wherein: The bottom surface positioning members are provided with at least two.

8. The capacitor according to claim 6, wherein: The bottom surface positioning member is fixedly connected to the bottom surface of the insulating isolation layer.

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