Integrated matching structure of upper cover and terminal of capacitor

Abstract

The utility model relates to an integrated matching structure of a capacitor upper cover and a terminal, which comprises a circular upper cover, the upper cover is provided with a cover surface, two extraction electrodes arranged at intervals are uniformly distributed on the cover surface, the two extraction electrodes and the cover surface are integrally formed with the upper cover through injection molding, and at least part of the top end of each extraction electrode protrudes out of the upper surface of the cover surface. The bottom end of the extraction electrode at least partially protrudes out of the lower surface of the cover surface; the structure effectively ensures the integrated connection between the extraction electrode and the upper cover, and the structure is firm and stable.

Description

Technical Field

[0001] The utility model relates to the field of capacitors, in particular to an integrated matching structure of a capacitor upper cover and a terminal. Background Art

[0002] The circular aluminum shell capacitors currently on the market mainly include a shell, an insulating cover, a lead electrode and a conductive busbar. The insulating cover is connected to the shell, a capacitor core is arranged in the shell, and the conductive busbar is connected to the capacitor core. The lead electrode is then welded to the conductive busbar, and the lead electrode passes through the insulating cover and extends out of the capacitor. Finally, the lead electrode is encapsulated and fixed with a dry epoxy resin. The applicant has improved and perfected the prior art to provide a new solution that can replace the above-mentioned prior art problems for consumers to choose and use. Summary of the invention

[0003] The utility model aims to provide an integrated matching structure of a capacitor upper cover and a terminal which has a simple and reasonable structure, is easy to install and has a stable structure.

[0004] The integrated matching structure of the capacitor upper cover and the terminal comprises a circular upper cover, the upper cover is provided with a cover surface, two lead-out electrodes are evenly distributed on the cover surface and are spaced apart from each other, the two lead-out electrodes and the cover surface are integrally formed with the upper cover by injection molding, and the top end of the lead-out electrode at least partially protrudes from the upper surface of the cover surface, and the bottom end of the lead-out electrode at least partially protrudes from the lower surface of the cover surface.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, an explosion-proof buckle cover opening is also opened on the cover surface, and a pressure-relieving explosion-proof buckle is assembled and connected inside the explosion-proof buckle cover opening.

[0007] As a further solution, two lead-out electrodes are connected to the cover surface along a symmetry line of the upper cover; two pressure relief and explosion-proof buckles are arranged on the cover surface on another symmetry line along the upper cover, and the two pressure relief and explosion-proof buckles and the two lead-out electrodes are arranged in a cross on the cover surface.

[0008] As a further solution, the lead-out electrode is a lead-out bolt made of metallic copper, and the outer surface of the lead-out bolt is provided with an electroplating layer; the bottom surface of the lead-out bolt is provided with a non-plated area through milling to expose the metallic copper of the lead-out bolt.

[0009] As a further solution, the lead-out bolt includes a hexagonal head and a rod, the rod is provided with at least one circle of inner groove or thread groove, the inner groove is injection molded in the cover surface, and the hexagonal head and the rod are at least partially injection molded in the cover surface, and the other parts protrude from the upper surface and lower surface of the cover surface respectively.

[0010] As a further solution, a convex ring as a water inlet is provided at the center of the cover surface, an upper convex edge is provided at the circumferential edge of the cover surface, and a plurality of external reinforcing ribs are provided between the upper convex edge and the convex ring.

[0011] As a further solution, a thickened boss is provided on the lower surface of the cover surface corresponding to the fixed position of the lead-out electrode, and a plurality of internal reinforcing ribs are provided between the thickened boss and the inner wall of the upper cover; an intermediate reinforcing rib is provided at the center position of the cover surface, and the intermediate reinforcing rib is a linear structure and is separated between two thickened bosses.

[0012] As a further solution, an electrode connecting sleeve is provided on the upper surface of the cover surface corresponding to the fixed position of the lead-out electrode, a part of the rod portion is injection molded in the cover surface and the electrode connecting sleeve, and a part of the hexagonal head portion is injection molded in the thickened boss.

[0013] As a further solution, a cylindrical outer shell is also included, one end of which is provided with an opening, and a plug-in cylinder is extended from the bottom side of the upper cover, and the plug-in cylinder is embedded in the opening to assemble and connect the upper cover and the outer shell.

[0014] As a further solution, an outer wall of the plug-in tube is provided with an introduction slope close to the outer end, and the inclination angle of the introduction slope is between 5° and 8°.

[0015] The beneficial effects of the utility model are as follows:

[0016] The lead-out electrode is directly loaded into the injection mold, and then directly integrated with the upper cover by injection molding, which effectively ensures the integrated connection between the lead-out electrode and the upper cover, and the structure is firm and stable.

[0017] The inner and outer reinforcing ribs of the upper cover effectively ensure the flatness of the upper cover. The inner reinforcing ribs ensure the adhesion and pulling force of the internal packaging material, and the outer reinforcing ribs ensure the flatness of the lead-out electrode and the overall inclination of the upper cover.

[0018] The inner groove structure, multi-layer boss and hexagonal head structure of the lead-out electrode ensure the firmness of the lead-out electrode after being integrally molded with the upper cover by injection molding, and avoid the synchronous rotation and movement of the nut and the screw caused by the rotation of the screw when tightening the screw with high torque during installation.

[0019] The matching design between the pressure relief and explosion-proof buckle and the upper cover effectively ensures the tight fit of the upper cover and the pressure relief and explosion-proof buckle and the product's sealing, moisture-proof and oxidation-resistant properties.

[0020] Injection molding effectively ensures that the pitch deviation between the lead electrodes is ≤0.3mm, the exposure deviation is ≤0.2mm, and the inclination deviation between the bolts is ≤0.2mm; BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0022] Figure 2 This is a schematic diagram of the structure of the pressure relief and explosion-proof buckle in the utility model decomposed from the cover surface.

[0023] Figure 3 It is a schematic diagram of the cross section and partial enlarged structure of the upper cover in the utility model.

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the bolt in the utility model.

[0025] Figure 5 This is a schematic diagram of the bolt structure in the utility model.

[0026] Figure 6 It is a schematic diagram of the cross-sectional structure of the upper cover in the utility model from another angle.

[0027] Figure 7 It is a schematic diagram of the lower surface structure of the upper cover in the utility model.

[0028] Figure 8 It is a schematic diagram of the matching structure of the upper cover and the outer shell in the utility model.

[0029] Fig. 9 This is a schematic diagram of the inclined plane structure introduced into the utility model. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figures 1 to 7 As shown, the integrated matching structure of the capacitor upper cover and the terminal includes a circular upper cover 1, the upper cover 1 is provided with a cover surface 2, and two lead electrodes 3 are evenly distributed on the cover surface 2 and are spaced apart from each other. The two lead electrodes 3 and the cover surface 2 are integrally formed with the upper cover 1 by injection molding, and the top end of the lead electrode 3 at least partially protrudes from the upper surface of the cover surface 2, and the bottom end of the lead electrode 3 at least partially protrudes from the lower surface of the cover surface 2; the lead electrode 3 is directly loaded into the injection mold, and then directly integrated with the upper cover 1 by injection molding, which effectively ensures the integrated connection between the lead electrode 3 and the upper cover 1, and the structure is firm and stable.

[0032] The cover surface 2 is also provided with an explosion-proof buckle cover opening 201, and a pressure-relieving explosion-proof buckle 4 is assembled and connected inside the explosion-proof buckle cover opening 201; the pressure-relieving explosion-proof buckle 4 is installed after the product packaging is completed, and when the product is damaged, the large internal energy impact will push open the pressure-relieving explosion-proof buckle 4, thereby achieving a pressure relief effect and an explosion-proof effect.

[0033] Specifically, a circle of bosses 2011 is provided inside the explosion-proof buckle cover 201, and the pressure relief explosion-proof buckle 4 is placed on the boss 2011 so that the surface of the pressure relief explosion-proof buckle 4 is flush with the upper surface of the cover 2, and the bottom surface of the pressure relief explosion-proof buckle 4 is provided with a stop rib 41 that cooperates with the inner side of the boss 2011; this structure effectively ensures the cooperation between the pressure relief explosion-proof buckle 4 and the upper cover 1, and the epoxy resin exceeds the upper cover 1 a little bit, which can also ensure that the stop rib 41 of the pressure relief explosion-proof buckle 4 blocks the packaging material to prevent the packaging from overflowing, or it can just tightly buckle the upper cover 1 without pulling it with epoxy resin. The cooperation design between the pressure relief explosion-proof buckle 4 and the upper cover 1 effectively ensures the tight fit of the upper cover 1 and the pressure relief explosion-proof buckle 4 and the sealing, moisture-proof and oxidation-resistant properties of the product.

[0034] Two lead-out electrodes 3 are connected to the cover surface 2 along a symmetry line of the upper cover 1; two pressure relief and explosion-proof buckles 4 are arranged on the cover surface 2 along another symmetry line of the upper cover 1, and the two pressure relief and explosion-proof buckles 4 and the two lead-out electrodes 3 are arranged in a cross shape on the cover surface 2; so that the two pressure relief and explosion-proof buckles 4 and the two lead-out electrodes 3 can be evenly distributed on the cover surface 2, and the layout is reasonable.

[0035] The lead-out electrode 3 is a lead-out bolt made of metallic copper, and an electroplating layer 5 is provided on the outer surface of the lead-out bolt; a non-plated area 34 is provided on the bottom surface of the lead-out bolt to expose the metallic copper of the lead-out bolt by milling; after the lead-out electrode 3 is electroplated, a cut is made on the bottom surface of the lead-out electrode 3 to expose the metallic copper of the lead-out electrode 3, thereby ensuring the weldability of the lead-out electrode 3 and the bottom connecting piece.

[0036] After the injection molding, the upper cover 1 can be directly welded to its connecting piece and the lead-out electrode 3 by soldering or high-frequency welding.

[0037] The lead-out bolt includes a hexagonal head 31 and a stem 32, the stem 32 is provided with at least one circle of inner groove 33 or thread groove, the inner groove 33 is injection molded in the cover 2, and at least part of the hexagonal head 31 and the stem 32 are injection molded in the cover 2, and the other part protrudes from the upper surface and the lower surface of the cover 2 respectively;

[0038] During injection molding, the inner groove 33 is completely injected into the cover surface 2, and the inner groove 33 ensures that the injection plastic can enter the inside of the lead-out bolt to fasten it in multiple layers, making the lead-out electrode connection more firmly, effectively ensuring the contact force and torsional resistance between the lead-out electrode 3 and the upper cover 1 after injection molding, and high-strength sealing, and the hexagonal head 31 avoids the rotation caused by tightening the lead-out bolt at a large torque during installation, causing the lead-out bolt to rotate and move synchronously, ensuring that the lead-out bolt does not loosen.

[0039] A convex circular ring 202 serving as a water inlet is provided at the center of the cover surface 2, an upper convex edge 203 is provided on the circumferential edge of the cover surface 2, and a plurality of external reinforcing ribs 204 are provided between the upper convex edge 203 and the convex circular ring 202; the plurality of external reinforcing ribs 204 are radially arranged, and each external reinforcing rib 204 is separated and arranged between adjacent lead-out electrodes 3 and explosion-proof buckle cover openings 201;

[0040] A thickened boss 205 is provided on the lower surface of the cover surface 2 at a fixed position corresponding to the lead-out electrode 3, and a plurality of inner reinforcing ribs 206 are provided between the thickened boss 205 and the inner wall of the upper cover 1; an intermediate reinforcing rib 207 is provided at the center position of the cover surface 2, and the intermediate reinforcing rib 207 is a linear structure and is separated between two thickened bosses 205.

[0041] The convex ring 202 as a water injection port ensures the aesthetics and overall compatibility of the product shell. The injection plastic flows evenly from the middle to both sides. The inside and outside of the convex ring 202 are thickened discharge positions, the maximum position of the mold space, and the inner and outer reinforcing ribs extend through the injection plastic position to ensure the uniformity of the overall material direction of the upper cover 1, the consistency of color appearance and the overall deformation of the upper cover 1.

[0042] The inner reinforcing ribs 206 and the outer reinforcing ribs 204 of the upper cover 1 effectively ensure the flatness of the upper cover 1 . The inner reinforcing ribs 206 ensure the adhesion and pulling force of the internal packaging material, and the outer reinforcing ribs 204 ensure the flatness of the lead-out electrode 3 and the overall inclination of the upper cover.

[0043] The inner wall of the upper cover 1 can be treated with a frosted surface to effectively increase the contact sealing performance of the packaging material.

[0044] An electrode connecting sleeve 208 is provided on the upper surface of the cover 2 at a fixed position corresponding to the lead-out electrode 3, a portion of the rod 32 is injection molded in the cover 2 and the electrode connecting sleeve 208, and a portion of the hexagonal head 31 is injection molded in the thickened boss 205; the electrode connecting sleeve 208 is used to allow a lead-out bolt with a certain height, and its rod 32 can be wrapped in plastic, so that the cover 2 does not need to increase its thickness.

[0045] like Figure 8 As shown, it also includes a cylindrical shell 6, one end of which is provided with an opening 61, and the bottom side of the upper cover 1 is provided with a plug-in tube 7, which is embedded in the opening 61 to make the upper cover 1 and the shell 6 assembled and connected; the shell 6 and the upper cover 1 cooperate to form an inner cavity for assembling the capacitor core.

[0046] like Fig. 9As shown, the outer wall of the plug-in tube 7 is provided with an introduction slope 71 close to the outer end, and the inclination angle α of the introduction slope 71 is between 5° and 8°. The plug-in tube 7 of this structure effectively ensures the tight fit and insertability of the upper cover 1 into the outer shell 6, and is pressed tightly into the inner part of the outer shell through the inclination of the introduction slope 71.

[0047] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An integrated matching structure of a capacitor upper cover and a terminal, comprising a circular upper cover (1), wherein the upper cover (1) is provided with a cover surface (2), and characterized in that: The cover surface (2) is evenly distributed with two lead-out electrodes (3) arranged at intervals, the two lead-out electrodes (3) and the cover surface (2) are integrally formed with the upper cover (1) by injection molding, and the top ends of the lead-out electrodes (3) at least partially protrude from the upper surface of the cover surface (2), and the bottom ends of the lead-out electrodes (3) at least partially protrude from the lower surface of the cover surface (2).

2. The integrated matching structure of the capacitor cover and the terminal according to claim 1, characterized in that The cover surface (2) is also provided with an explosion-proof buckle cover opening (201), and a pressure relief explosion-proof buckle (4) is assembled and connected inside the explosion-proof buckle cover opening (201).

3. The integrated matching structure of the capacitor cover and the terminal according to claim 1, characterized in that : Two lead-out electrodes (3) are connected to the cover surface (2) along a symmetry line of the upper cover (1); two pressure relief and explosion-proof buckles (4) are arranged on the cover surface (2) along another symmetry line of the upper cover (1); the two pressure relief and explosion-proof buckles (4) and the two lead-out electrodes (3) are arranged on the cover surface (2) in a cross shape.

4. The integrated matching structure of the capacitor cover and the terminal according to claim 1, characterized in that The lead-out electrode (3) is a lead-out bolt made of metallic copper, and the outer surface of the lead-out bolt is provided with an electroplating layer (5); the bottom surface of the lead-out bolt is provided with a non-plated area (34) through which the metallic copper of the lead-out bolt is exposed by milling.

5. The integrated matching structure of the capacitor cover and the terminal according to claim 4, characterized in that The lead-out bolt comprises a hexagonal head (31) and a stem (32); the stem (32) is provided with at least one circle of inner groove (33) or thread groove; the inner groove (33) is injection-molded in the cover surface (2); at least part of the hexagonal head (31) and the stem (32) are injection-molded in the cover surface (2), and the other part protrudes from the upper surface and the lower surface of the cover surface (2) respectively.

6. The integrated matching structure of the capacitor cover and the terminal according to claim 1, characterized in that A convex circular ring (202) serving as a water inlet is provided at the center of the cover surface (2), an upper convex edge (203) is provided at the circumferential edge of the cover surface (2), and a plurality of external reinforcing ribs (204) are provided between the upper convex edge (203) and the convex circular ring (202).

7. The integrated matching structure of the capacitor cover and the terminal according to claim 5, characterized in that A thickened boss (205) is provided on the lower surface of the cover surface (2) at a fixed position corresponding to the lead-out electrode (3), and a plurality of inner reinforcing ribs (206) are provided between the thickened boss (205) and the inner wall of the upper cover (1); an intermediate reinforcing rib (207) is provided at the center of the cover surface (2), and the intermediate reinforcing rib (207) is in a linear structure and is separated between the two thickened bosses (205).

8. The integrated matching structure of the capacitor cover and the terminal according to claim 7, characterized in that An electrode connection sleeve (208) is provided on the upper surface of the cover surface (2) at a fixed position corresponding to the lead-out electrode (3), a portion of the rod portion (32) is injection molded into the cover surface (2) and the electrode connection sleeve (208), and a portion of the hexagonal head portion (31) is injection molded into the thickened boss (205).

9. The integrated matching structure of the capacitor cover and the terminal according to claim 1, characterized in that The invention also comprises a cylindrical outer shell (6), one end of the outer shell (6) being provided with an opening (61), and a plug-in tube (7) extending from the bottom side of the upper cover (1), and the plug-in tube (7) being embedded in the opening (61), so that the upper cover (1) and the outer shell (6) are assembled and connected.

10. The integrated matching structure of the capacitor cover and the terminal according to claim 9, characterized in that An outer wall of the plug-in tube (7) is provided with an inlet slope (71) close to the outer end, and the inclination angle of the inlet slope (71) is between 5° and 8°.

Images