Counter-rivet structure top cover

Abstract

The utility model provides a top cover of anti -riveting structure belongs to mechanical technical field. This top cover of anti -riveting structure includes the upper connecting cylinder and lower connecting cylinder of cylinder shape, the upper connecting cylinder is located top cover piece upper portion and its with the upper portion of connecting hole is open, the lower connecting cylinder is located top cover piece lower portion and its with the lower portion of connecting hole is open, the upper connecting cylinder upper end inboard has the protruding stop along no.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically to a top cover with a reverse riveting structure. Background Technology

[0002] Currently, the riveting structure generally uses the top surface of the battery cell to be riveted. The product relies on the deformation of the top surface structure to ensure the push-pull force of the positive and negative terminals. However, the riveting process requires contact with the top surface of the top cover, which is prone to abrasion. It is also easily affected by the accuracy of the riveting tooling and the size of the product parts, which can lead to defects such as overflow, insufficient glue, or flatness of the plastic on the positive and negative terminals during injection molding. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a top cover with a highly stable and compact reverse-riveted structure.

[0004] To achieve the above objectives, this utility model can be implemented through the following technical solutions:

[0005] A riveted top cover includes a top cover sheet, an electrode post, a lower plastic part, an upper plastic part, and a rubber-coated part. The top cover sheet is flat and made of metal. The top cover sheet has a through connection hole. The electrode post is embedded in the connection hole and tightly connected. The top cover sheet further includes a cylindrical upper connecting cylinder and a cylindrical lower connecting cylinder. The upper connecting cylinder is located on the upper part of the top cover sheet and communicates with the upper part of the connection hole. The lower connecting cylinder is located on the lower part of the top cover sheet and communicates with the lower part of the connection hole. The upper inner side of the upper connecting cylinder has a first protruding flange, and the lower inner side of the lower connecting cylinder has a second protruding flange. The electrode post is positioned in the connection hole between the first and second flanges. The upper plastic part is located between the upper connecting cylinder and the electrode post. The rubber-coated part is located between the lower connecting cylinder and the electrode post. The lower plastic part is flat and matches the top cover sheet. The lower plastic part is fixedly connected to the lower part of the top cover sheet.

[0006] In the top cover of the aforementioned riveted structure, the lower plastic has a through clearance hole, which is directly opposite the connecting hole.

[0007] In the aforementioned riveted top cover, the upper connecting cylinder, the lower connecting cylinder, and the top cover plate are an integral structure.

[0008] In the aforementioned anti-riveting structure top cover, the lower part of the top cover plate has an annular recessed deformation groove, which is located on the outside of the lower connecting cylinder.

[0009] In the top cover of the above-mentioned riveted structure, the wall thickness of the upper connecting cylinder is A, and the wall thickness of the lower connecting cylinder is B, where A is 3 / 5 to 4 / 5 of B.

[0010] In the top cover of the above-mentioned riveted structure, the depth dimension of the deformation groove is C, the thickness dimension of the top cover piece is D, and C is 3 / 5 to 1 / 2 of D.

[0011] In the aforementioned riveted top cover, the top cover sheet is made of metal, and the lower plastic, upper plastic, and encapsulated parts are made of insulating materials.

[0012] In the top cover of the aforementioned anti-riveting structure, the second retaining flange is located within the deformation groove.

[0013] In the top cover of the above-mentioned riveted structure, the upper part of the lower plastic has a protruding contact portion, the above-mentioned clearance hole is located at the contact portion and the contact portion abuts against the lower part of the second retaining edge.

[0014] In the aforementioned riveted top cover, the lower plastic part has a recessed deformation portion that is directly opposite the contact portion.

[0015] Compared with the prior art, in the top cover of this reverse riveting structure, when the top cover plate is in the part state, there is no second retaining flange on the lower connecting cylinder, and the lower connecting cylinder extends out of the top cover plate. After riveting the bottom of the lower connecting cylinder with a riveting device, a second retaining flange protruding inward is formed at the lower part of the lower connecting cylinder, and the electrode post is effectively positioned by the first retaining flange and the second retaining flange.

[0016] It can be seen that the top cover of this reverse riveting structure has the following advantages:

[0017] 1. The product adopts a reverse riveting process, which can still meet the push and pull force of the product while reducing the contact with the upper surface of the top cover, and greatly reducing the scrap rate caused by poor product appearance.

[0018] 2. The reverse riveting structure top cover can limit the injection-related dimensions of the stamping process to a greater extent, reducing injection-molding dimensional defects caused by the size of product parts, and avoiding the risk of false sealing caused by the sealing ring falling off during the positive and negative terminal assembly process of the original structure. Thus, the product yield is greatly improved without affecting product performance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the top cover of this anti-riveting structure.

[0020] Figure 2 This is a cross-sectional structural diagram of the top cover of this anti-riveting structure.

[0021] Figure 3 This is a partial cross-sectional view of the electrode post in the top cover of this riveted structure.

[0022] Figure 4 This is a cross-sectional view of the top cover of this reverse riveting structure before riveting.

[0023] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0024] In the picture:

[0025] 1. Top cover plate; 1a. Connecting hole; 1b. Upper connecting cylinder; 1b1. First retaining edge; 1c. Lower connecting cylinder; 1c1. Second retaining edge; 1d. Deformation groove; 2. Electrode post; 3. Lower plastic; 3a. Clearance hole; 3b. Contact part; 3c. Deformation part; 4. Upper plastic; 5. Coated part. Detailed Implementation

[0026] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0027] like Figure 1-5 As shown, the top cover of this reverse riveting structure includes a top cover plate 1, an electrode post 2, a lower plastic part 3, an upper plastic part 4, and a rubber-coated part 5. The top cover plate 1 is flat and made of metal. The top cover plate 1 has a through connecting hole 1a. The electrode post 2 is embedded in the connecting hole 1a and tightly connected. It also includes a cylindrical upper connecting cylinder 1b and a lower connecting cylinder 1c. The upper connecting cylinder 1b is located on the upper part of the top cover plate 1 and communicates with the upper part of the connecting hole 1a. The lower connecting cylinder 1c is located on the lower part of the top cover plate 1 and communicates with the connecting hole 1a. The lower part is connected. The upper connecting cylinder 1b has a protruding flange 1b1 on the inner side of its upper end, and the lower connecting cylinder 1c has a protruding flange 1c1 on the inner side of its lower end. The electrode post 2 is positioned at the connecting hole 1a between the flange 1b1 and the flange 1c1. The upper plastic 4 is located between the upper connecting cylinder 1b and the electrode post 2. The plastic-coated part 5 is located between the lower connecting cylinder 1c and the electrode post 2. The lower plastic 3 is flat and matches the top cover plate 1. The lower plastic 3 is fixedly connected to the lower part of the top cover plate 1.

[0028] When the top cover plate 1 is not installed on the top cover and is used as a part, the lower connecting cylinder 1c at the bottom of the top cover plate 1 does not have a retaining flange 1c1, but the lower end of the lower connecting cylinder 1c extends out of the bottom of the top cover plate 1.

[0029] After the electrode post 2, the upper plastic 4 and the rubber-coated part 5 are installed, the lower end of the lower connecting cylinder 1c is riveted using a riveting device. Only after this process will a retaining edge 1c1 be formed at the lower end of the lower connecting cylinder 1c.

[0030] This structure allows the electrode post 2, the upper plastic 4, and the rubber-coated part 5 to be easily inserted into the connection hole of the top cover plate 1. Once the lower connecting cylinder 1c is riveted, the electrode post 2 is finally stably positioned on the top cover plate 1 by the action of the first stop 1b1 and the second stop 1c1.

[0031] Of course, the upper plastic 4 and the rubber coating 5 can keep the electrode post 2 and the top cover plate 1 insulated.

[0032] The upper plastic 4 is filled between the upper connecting cylinder 1b and the electrode post 2, and the rubber-coated part 5 is filled between the lower connecting cylinder 1c and the electrode post 2.

[0033] The lower plastic 3 has a through clearance hole 3a, which is directly opposite the connecting hole 1a.

[0034] The upper connecting cylinder 1b, the lower connecting cylinder 1c, and the top cover plate 1 are an integral structure.

[0035] This effectively improves the structural compactness of the entire top cover plate 1.

[0036] The lower part of the top cover plate 1 has an annular recessed deformation groove 1d, which is located outside the lower connecting cylinder 1c.

[0037] During the riveting process, the deformation groove 1d enables the retaining edge 1c1 to be stably formed, thus avoiding damage to the top cover 1 during the riveting process.

[0038] The wall thickness of the upper connecting cylinder 1b is A, and the wall thickness of the lower connecting cylinder 1c is B, where A is 3 / 5 of B. However, depending on the actual situation, A being 4 / 5 of B is also feasible.

[0039] Since the riveting process is carried out at the lower connecting cylinder 1c, appropriately increasing the wall thickness of the lower connecting cylinder 1c can ensure that the lower connecting cylinder 1c has adequate strength during the riveting process and prevent it from breaking.

[0040] The depth dimension of the deformation groove 1d is C, and the thickness dimension of the top cover plate is D, where C is 3 / 5 of D. Depending on the actual situation, C being 1 / 2 of D is also feasible.

[0041] This structure allows the flange 1c1 of the lower connecting cylinder 1c to be stably formed.

[0042] The top cover 1 is made of metal, and the lower plastic 3, upper plastic 4 and the encapsulated part are made of 55 insulating material.

[0043] The second retaining edge 1c1 is located inside the deformation groove.

[0044] The lower plastic 3 has a protruding contact portion 3b on its upper part, and the aforementioned clearance hole 3a is located at the contact portion 3b and the contact portion 3b abuts against the lower part of the retaining edge 1c1.

[0045] Since the contact part 3b contacts the baffle 1c1, this structure can ensure the stability and compactness of the entire top cover.

[0046] The lower part of the lower plastic 3 has a recessed deformation part 3c that is directly opposite to the contact part 3b.

[0047] The deformable part 3c can deform slightly, thus avoiding rigid contact between the top cover 1 and the lower plastic 3.

[0048] In this embodiment, the electrode post 2 includes a positive electrode and a negative electrode, both of which have the same structure and are symmetrically distributed at both ends of the top cover plate 1.

[0049] In the top cover of this reverse riveting structure, when the top cover plate is in the part state, there is no second retaining flange on the lower connecting cylinder, and the lower connecting cylinder extends out of the top cover plate. After riveting the bottom of the lower connecting cylinder using riveting equipment, a second retaining flange protruding inward is formed at the lower part of the lower connecting cylinder. The electrode post is effectively positioned by the first retaining flange and the second retaining flange.

[0050] It can be seen that the top cover of this reverse riveting structure has the following advantages:

[0051] 1. The product adopts a reverse riveting process, which can still meet the push and pull force of the product while reducing the contact with the upper surface of the top cover, and greatly reducing the scrap rate caused by poor product appearance.

[0052] 2. The reverse riveting structure top cover can limit the injection-related dimensions of the stamping process to a greater extent, reducing injection-molding dimensional defects caused by the size of product parts, and avoiding the risk of false sealing caused by the sealing ring falling off during the positive and negative terminal assembly process of the original structure. Thus, the product yield is greatly improved without affecting product performance.

[0053] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0054] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A top cover with a reverse riveting structure, comprising a top cover sheet, electrode posts, a lower plastic layer, an upper plastic layer, and a rubber-coated portion, wherein the top cover sheet is flat and made of metal, and has a through connection hole, and the electrode posts are embedded in the connection hole and tightly fitted together, characterized in that, It also includes a cylindrical upper connecting cylinder and a lower connecting cylinder. The upper connecting cylinder is located on the upper part of the top cover plate and communicates with the upper part of the connecting hole. The lower connecting cylinder is located on the lower part of the top cover plate and communicates with the lower part of the connecting hole. The upper inner side of the upper connecting cylinder has a protruding flange one, and the lower inner side of the lower connecting cylinder has a protruding flange two. The electrode post is positioned at the connecting hole between flange one and flange two. The upper plastic is located between the upper connecting cylinder and the electrode post. The plastic coating is located between the lower connecting cylinder and the electrode post. The lower plastic is flat and matches the top cover plate. The lower plastic is fixed to the lower part of the top cover plate.

2. The top cover of the anti-riveting structure according to claim 1, characterized in that, The lower plastic part has a through clearance hole, which is directly opposite the connection hole.

3. The top cover of the anti-riveting structure according to claim 2, characterized in that, The upper connecting cylinder, lower connecting cylinder, and top cover plate are an integral structure.

4. The top cover of the anti-riveting structure according to claim 2 or 3, characterized in that, The lower part of the top cover plate has an annular recessed deformation groove, which is located on the outside of the lower connecting cylinder.

5. The top cover of the anti-riveting structure according to claim 1, 2, or 3, characterized in that, The wall thickness of the upper connecting cylinder is A, and the wall thickness of the lower connecting cylinder is B, where A is 3 / 5 to 4 / 5 of B.

6. The top cover of the anti-riveting structure according to claim 4, characterized in that, The depth of the deformation groove is C, and the thickness of the top cover is D, where C is 3 / 5 to 1 / 2 of D.

7. The top cover of the anti-riveting structure according to claim 6, characterized in that, The top cover is made of metal, and the lower plastic, upper plastic and the rubber coating are made of insulating materials.

8. The top cover of the anti-riveting structure according to claim 7, characterized in that, The second retaining edge is located within the deformation groove.

9. The top cover of the anti-riveting structure according to claim 8, characterized in that, The upper part of the lower plastic has a protruding contact portion, and the aforementioned clearance hole is located at the contact portion and the contact portion abuts against the lower part of the second retaining edge.

10. The top cover of the anti-riveting structure according to claim 9, characterized in that, The lower plastic part has a recessed deformation portion that is directly opposite the contact portion.

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