Sealing capacitor cover plate

Abstract

The utility model relates to a sealed capacitor cover plate, and belongs to the technical field of capacitors. The capacitor cover plate further comprises an insulation sleeve, the insulation sleeve comprises an insulation ring corresponding to the side wall of the cover plate body, an inner sealing face and an outer sealing face, the inner sealing face and the outer sealing face are arranged on the end faces of the two opposite sides of the insulation ring in a sealed mode respectively, and the inner sealing face faces an inner cavity of a capacitor and covers the end faces of the cover plate body. The outer sealing face is used for making contact with the outside. The sealing effect of the capacitor cover plate can be improved, and the probability that an external pollution source enters the capacitor through the cover plate is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of capacitors, and particularly to a sealed capacitor cover plate. Background Art

[0002] A capacitor, also known as a capacitance, is a passive electronic component that can store and release electric charges. The capacitor cover plate is an important part of the capacitor. It is located at the top of the capacitor and mainly functions as sealing, insulation, protection, and connection.

[0003] The capacitor cover plate generally includes a cover plate body, a wiring terminal provided on the cover plate body, and an insulating ring. The insulating ring is integrally in a ring shape and is sleeved outside the cover plate body, and is fixed to the cover plate body by hot pressing. Since the environment where the capacitor is used is prone to generate pollution sources such as dust and oil stains, the capacitor cover plate using the above insulating ring is likely to allow external pollution sources to enter the capacitor, thereby affecting the service life of the capacitor. Summary of the Utility Model

[0004] In order to improve the sealing effect of the capacitor cover plate and reduce the probability of external pollution sources entering the capacitor through the cover plate, the present application provides a sealed capacitor cover plate.

[0005] The sealed capacitor cover plate provided by the present application adopts the following technical solutions:

[0006] A sealed capacitor cover plate includes a cover plate body and a wiring terminal, and further includes an insulating sleeve. The insulating sleeve includes an insulating ring corresponding to the side wall of the cover plate body, and an inner sealing surface and an outer sealing surface respectively and sealingly provided on opposite end faces of the insulating ring. The inner sealing surface faces the inner cavity of the capacitor, and the inner sealing surface covers the end face of the cover plate body, and the outer sealing surface is used for contacting the outside.

[0007] By adopting the above technical solutions, the insulating sleeve includes an insulating ring sleeved on the side wall of the cover plate and two parts respectively and sealingly provided on opposite sides of the cover plate body. When the capacitor cover plate is installed, the insulating ring is sealingly connected to the opening of the capacitor. The inner sealing surface covers the end face of the cover plate body facing the container. When an external pollution source enters from between the outer sealing surface and the cover plate, it can be blocked by the inner sealing surface, ensuring the internal and external sealing effects of the capacitor.

[0008] Optionally, a sealing ring groove is provided on the side of the cover plate body facing the outer sealing surface, and a sealing ring cooperating with the sealing ring groove is provided on the outer sealing surface of the insulating sleeve.

[0009] By adopting the above technical solutions, the cooperation of the sealing ring groove and the sealing ring increases the path for pollution sources to enter the capacitor through the gap, further improving the sealing effect of the insulating sleeve.

[0010] Optionally, a plurality of positioning grooves are circumferentially spaced on the outer side of the cover plate body, and positioning edges that are snap-fitted with the positioning grooves are provided on the inner side of the insulating ring.

[0011] By adopting the above technical solution, the cooperation of the positioning grooves and the positioning edges can achieve a preliminary fixing effect on the connection between the insulating sleeve and the cover plate body, reduce the probability of the insulating sleeve rotating during the subsequent installation of the terminal block, and improve the assembly efficiency.

[0012] Optionally, the cover plate body is provided with an installation hole that penetrates both end faces and is for installing the terminal block, and an insulating through hole corresponding to the installation hole is provided on the inner sealing surface.

[0013] By adopting the above technical solution, after the insulating sleeve and the cover plate body are initially connected, the terminal block sequentially passes through the installation hole and the insulating through hole from the outer sealing surface, further fixing the insulating sleeve on the cover plate body.

[0014] Optionally, the terminal block includes a terminal post and a terminal piece. The terminal post passes through the installation hole and is connected to the inside of the capacitor, and the terminal piece is arranged on one side of the outer sealing surface for connection to the outside.

[0015] By adopting the above technical solution, the structural composition of the terminal block is disclosed. The terminal post passes through the installation hole and is connected to the electrolytic substance inside the capacitor, and the terminal piece is used for connection to the outside for charging and discharging.

[0016] Optionally, the cover plate body is provided with a positioning sink for positioning and arranging the terminal piece at the installation hole.

[0017] By adopting the above technical solution, the setting of the positioning sink can play a positioning role in the arrangement of the terminal piece, so that when the terminal post is fixed, the probability of the terminal piece shaking is reduced, and the terminal piece is ensured to maintain the required posture.

[0018] Optionally, the inner side of the outer sealing surface and the positioning sink are spaced apart.

[0019] By adopting the above technical solution, the inner side of the outer sealing surface and the positioning sink are spaced apart, that is, there is a gap between the outer sealing surface and the positioning sink, so that when the terminal post passes through the outer end face of the cover plate body, it is not easy to damage the outer sealing surface of the insulating sleeve, facilitating the installation of the terminal post.

[0020] Optionally, a positioning piece is provided on the terminal post, and a riveting groove corresponding to the positioning piece is provided on the cover plate body on the side away from the positioning sink. The positioning piece has a positioning ring that can be inserted into the riveting groove.

[0021] By adopting the above technical solution, after the installation of the terminal post is completed, the positioning piece is pressed against the inner end face of the cover body manually or by equipment. Through the cooperation of the riveting groove and the positioning ring, the sealing effect between the terminal post and the cover body can be improved.

[0022] Optionally, the outer side wall of the cover body has an inclined annular surface, and the inclined annular surface inclines inward along the axis of the cover body from the outer sealing surface to the inner sealing surface.

[0023] By adopting the above technical solution, the setting of the inclined annular surface facilitates the insertion of the cover body from one side of the outer sealing surface of the insulating sleeve, and improves the installation convenience of the cover body and the insulating sleeve.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. By setting the inner sealing surface in the present application, when external pollution sources enter between the outer sealing surface and the cover, they can be blocked by the inner sealing surface, ensuring the internal and external sealing effects of the capacitor;

[0026] 2. Through the cooperation of the positioning groove and the positioning rib in the present application, a preliminary fixing effect can be achieved on the connection between the insulating sleeve and the cover body, reducing the probability of mutual misalignment when the insulating sleeve and the cover body are fixedly connected;

[0027] 3. By setting the inclined annular surface in the present application, it is convenient for the cover body to be inserted from one side of the outer sealing surface of the insulating sleeve, improving the installation convenience of the cover body and the insulating sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0029] Figure 2 is the exploded schematic diagram of the embodiment of the present application.

[0030] Figure 3 is the sectional schematic diagram after assembly of the embodiment of the present application.

[0031] Description of the reference numerals: 1. Cover body; 11. Sealing ring groove; 12. Positioning groove; 13. Inclined annular surface; 14. Mounting hole; 141. Positioning sinking groove; 15. Positioning ring groove; 2. Wiring terminal; 21. Terminal post; 211. Positioning piece; 212. Positioning ring; 213. Pressing part; 22. Wiring terminal piece; 3. Insulating sleeve; 31. Insulating ring; 32. Inner sealing surface; 33. Outer sealing surface; 34. Sealing ring; 35. Positioning rib; 36. Insulating through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will further describe the present application in detail Figures 1-3 with reference to the attached

[0033] An embodiment of the present application discloses a sealing capacitor cover plate.

[0034] Referring to Figure 1 , a sealing capacitor cover plate includes a cover plate body 1, a wiring terminal 2, and an insulating sleeve 3. The cover plate body 1 is made of an insulating material and is integrally in a disc shape. In the cover plate body 1, one end face facing the inner cavity of the capacitor is defined as the inner end face, and one end face facing away from the inner cavity of the capacitor is defined as the outer end face.

[0035] Referring to Figure 1 and Figure 2 , the wiring terminal 2 is made of a metal conductive material and includes a wiring terminal post 21 and a wiring terminal piece 22. Among them, the wiring terminal post 21 passes through the outer end face and is connected to the electrolyte inside the capacitor. The wiring terminal piece 22 is located on the outer end face of the cover plate body 1 for realizing connection with the outside.

[0036] The insulating sleeve 3 includes an insulating ring 31, and an inner sealing surface 32 and an outer sealing surface 33 respectively arranged on opposite sides of the insulating ring 31. The insulating ring 31, the inner sealing surface 32, and the outer sealing surface 33 are all integrally formed of a rubber material. The insulating ring 31 is integrally in a ring shape, and the length in the axial direction thereof is the same as the thickness of the cover plate body 1. The inner sealing surface 32 and the outer sealing surface 33 are respectively hermetically arranged on the inner end face and the outer end face of the cover plate body 1. The inner sealing surface 32 completely covers the inner end face, and the outer sealing surface 33 partially covers the outer end face.

[0037] Referring to Figure 2 and Figure 3 , the cover plate body 1 has a sealing ring groove 11 on the outer edge of the outer end face, and the radial cross-section of the sealing ring groove 11 is in an arc shape. The insulating sleeve 3 is integrally provided with a sealing ring 34 on the side of the outer sealing surface 33 facing the inner sealing surface 32. The sealing ring 34 and the sealing ring groove 11 are fitted and inserted. Through the cooperation of the sealing ring 34 and the sealing ring groove 11, the path for external pollution sources to enter the capacitor is extended, thereby further improving the sealing effect between the insulating sleeve 3 and the cover plate body 1. Among them, the thickness of the outer edge of the outer end face of the cover plate body 1 is less than the maximum thickness in its axial direction, so that after the outer sealing surface 33 and the sealing ring groove 11 are hermetically fitted, the outer sealing surface 33 is flush with the outer end face.

[0038] A plurality of positioning grooves 12 are circumferentially arranged on the outer wall of the cover plate body 1, and both ends of the positioning grooves 12 penetrate through both end faces of the cover plate body 1. The notch of the positioning groove 12 is a V-shaped opening. In this embodiment, the cover plate body 1 has six positioning grooves 12, and the six positioning grooves 12 are circumferentially and evenly arranged at intervals along the axis of the cover plate body 1.

[0039] The inner side wall of the insulating ring 31 has positioning ridges 35 that are in one-to-one correspondence and fit with the positioning ring 212. Through the cooperation of the positioning ridges 35 and the positioning grooves 12, the pre-fixation of the insulating sleeve 3 and the cover body 1 is realized, which facilitates the final fixation of the insulating sleeve 3 and the cover body 1. In this embodiment, the insulating sleeve 3 and the cover body 1 are fixed by a hot pressing process, and the hot pressing area is the connection between the outer sealing surface 33 and the outer end face of the cover body 1.

[0040] To facilitate the installation of the cover body 1 and the insulating sleeve 3, an inclined annular surface 13 is further provided on the outer side wall of the cover body 1. The inclined annular surface 13 gradually inclines inward along the axis of the cover body 1 from the inner end face to the outer end face.

[0041] The cover body 1 has two mounting holes 14 that penetrate through both end faces. The two mounting holes 14 are arranged at intervals in the radial direction. The insulating sleeve 3 also has insulating through holes 36 corresponding to the mounting holes 14 on the inner sealing surface 32. The wiring terminal 2 is installed on the cover body 1 by passing through the mounting holes 14 and the insulating through holes 36 in sequence from the outer sealing surface 33.

[0042] The wiring terminal piece 22 is integrally in an L-shaped piece, including a first piece that fits on the cover body 1 and a second piece perpendicular to the first piece. The cover body 1 is provided with a positioning sunk groove 141 for positioning and arranging the wiring terminal piece 22 at the mounting hole 14. The cross-section of the positioning sunk groove 141 is adapted to the first piece and is rectangular. Through the setting of the positioning sunk groove 141, the placement of the wiring terminal piece 22 can be limited, ensuring that the two second pieces are perpendicular to each other.

[0043] To reduce the installation of the wiring terminal piece 22 on the outer sealing surface 33, the inner annular surface of the outer sealing surface 33 and the outer edge of the opening of the positioning sunk groove 141 are arranged at intervals.

[0044] The wiring terminal post 21 is integrally in a cylindrical rod shape. It has a positioning piece 211 on one side of the inner end face of the cover body 1. The positioning piece 211 is a circular piece. The positioning piece 211 fits on the cover body 1. The cover body 1 has a positioning ring groove 15 corresponding to the positioning piece 211 on the outer end face. The positioning piece 211 has a positioning ring 212 inserted into the positioning ring groove 15 on the side facing the cover body 1. The outer diameters of the insulating through hole 36 and the positioning ring groove 15 are adapted to each other.

[0045] The wiring terminal post 21 has a pressing part 213 on one side of the outer end face of the cover body 1. When the wiring terminal post 21 passes through from the inner end face, the positioning piece 211 abuts against the cover body 1 for positioning. Then the wiring terminal piece 22 is inserted into the pressing part 213. Finally, a stamping device is used to stamp and deform the pressing part 213 so that the pressing part 213 is pressed and deformed into a flat shape, realizing the fixation of the wiring terminal 2 and the cover body 1.

[0046] An assembly method of a sealing capacitor cover plate in an embodiment of the present application is as follows: Insert the cover plate body 1 from one side of the outer sealing surface 33 of the insulating sleeve 3, so that the sealing ring 34 and the sealing ring groove 11 are matched, the positioning groove 12 and the positioning edge 35 are matched, and the insulating through hole 36 corresponds to the mounting hole 14, to complete the preliminary fixation of the insulating sleeve 3 and the cover plate body 1, and then complete the final fixation of the insulating sleeve 3 and the cover plate body 1 by a hot pressing method;

[0047] Insert the terminal post 21 through the cover plate body 1 from one side of the inner end face, the positioning piece 211 is limited and abutted against the inner end face, the positioning ring 212 is adapted to the positioning ring groove 15, then insert the terminal piece 22 into the end of the terminal post 21, the terminal piece 22 is matched with the positioning sink 141, and finally press and deform the pressing part 213 through a stamping device to realize the final fixation of the terminal post 21 and the cover plate body 1.

[0048] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A sealed capacitor cover, comprising a cover body (1) and a connection terminal (2), characterized in that: It also comprises an insulating sleeve (3), the insulating sleeve (3) comprising an insulating ring (31) corresponding to the side wall of the cover body (1), and an inner sealing surface (32) and an outer sealing surface (33) respectively provided on opposite side end surfaces of the insulating ring (31), the inner sealing surface (32) facing the inner cavity of the capacitor, the inner sealing surface (32) covering the end surface of the cover body (1), and the outer sealing surface (33) in contact with the outside.

2. A sealed capacitor cover plate according to claim 1, characterized in that: The cover plate body (1) is provided with a sealing ring groove (11) on the side facing the outer sealing surface (33), and the insulating sleeve (3) is provided with a sealing ring (34) on the outer sealing surface (33) that cooperates with the sealing ring groove (11).

3. A sealed capacitor cover plate according to claim 1, characterized in that: The outer side of the cover plate body (1) is provided with a plurality of positioning grooves (12) spaced apart in the circumferential direction, and the inner side of the insulating ring (31) is provided with positioning edges (35) that are snap-fitted with the positioning grooves (12).

4. A sealed capacitor cover plate according to claim 1, characterized in that: The cover plate body (1) is provided with mounting holes (14) penetrating through the two side end surfaces and for mounting the connection terminals (2), and the inner sealing surface (32) has insulating through holes (36) corresponding to the mounting holes (14).

5. A sealed capacitor cover plate according to claim 4, characterized in that: The wiring terminal (2) comprises a wiring terminal post (21) and a wiring terminal piece (22); the wiring terminal post (21) passes through the mounting hole (14) and is connected to the inside of the capacitor; the wiring terminal piece (22) is arranged on one side of the outer sealing surface (33) and is used for connection with the outside.

6. A sealed capacitor cover plate according to claim 5, characterized in that: The cover plate body (1) is provided with a positioning recess (141) in the mounting hole (14) for positioning the terminal piece (22).

7. A sealed capacitor cover plate according to claim 6, characterized in that: The inner side of the outer sealing surface (33) and the positioning recessed groove (141) are arranged at intervals.

8. A sealed capacitor cover plate according to claim 7, characterized in that: A positioning piece (211) is provided on the terminal column (21), and a rivet groove corresponding to the positioning piece (211) is provided on the cover body (1) at a side away from the positioning recess (141), and the positioning piece (211) has a positioning ring (212) inserted into the rivet groove.

9. The sealed capacitor cover plate according to claim 1, characterized in that: The outer side wall of the cover plate body (1) has an inclined annular surface (13), and the inclined annular surface (13) is inclined inwardly along the axis of the cover plate body (1) from the inner sealing surface (32) to the outer sealing surface (33).

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