Riveting die for battery cover group

Abstract

The utility model discloses a battery cover group riveting die which comprises an upper die assembly and a lower die assembly, the upper die assembly comprises an upper die frame and a riveting head, and the riveting head is arranged on the upper die frame in a penetrating mode; the lower die assembly is located below the upper die assembly, the lower die assembly comprises a lower die positioning piece, a lower die cavity is formed in the lower die positioning piece, and the lower die cavity is used for positioning the battery cover group; and a limiting propping part is arranged on the lower die cavity, and is used for propping against the bottom of a sealing rubber ring on the battery cover group when the riveting head performs riveting operation on a pole on the battery cover group. Therefore, during riveting operation, the bottom of the sealing rubber ring can be limited and propped through the limiting and propping part, so that the periphery of the sealing rubber ring is prevented from warping, and the appearance quality and the sealing performance of the battery cover group can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production and manufacturing, in particular to a riveting die for a battery cover assembly. Background Art

[0002] As the core of energy supply for electronic devices, the performance and safety of batteries have received widespread attention. In the production and manufacturing process of batteries, riveting of battery cover groups is an important link; for example, the battery cover group is generally composed of components such as a cover plate, a sealing rubber ring and a pole. When assembling the battery cover group, the pole and other components need to be riveted together by a riveting mold. However, in traditional riveting molds for battery cover groups, the position of the lower mold cavity corresponding to the sealing rubber ring is usually an air-avoiding design, that is, the periphery of the sealing rubber ring is in a suspended unlimited state. During the riveting process, the periphery of the sealing rubber ring is easily squeezed and warped downward, thereby affecting the appearance quality of the battery cover group and further reducing the sealing performance of the battery cover group. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a battery cover assembly riveting die capable of sealing a rubber ring and preventing the rubber ring from peeling off, thereby improving the appearance quality and sealing performance of the battery cover assembly.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A battery cover assembly riveting die, comprising: an upper die assembly and a lower die assembly, the upper die assembly comprising an upper die frame and a riveting head, the riveting head being arranged on the upper die frame; the lower die assembly being located below the upper die assembly, the lower die assembly comprising a lower die positioning member, the lower die positioning member being provided with a lower die cavity, the lower die cavity being used for positioning the battery cover assembly; a limiting abutment portion being arranged on the lower die cavity, the limiting abutment portion being used for abutting against the bottom of a sealing rubber ring on the battery cover assembly when the riveting head is performing a riveting operation on a pole on the battery cover assembly.

[0006] In one of the embodiments, the lower mold cavity includes a limiting groove, the limiting abutment portion is arranged around the limiting groove, and the limiting groove is used to limit the pole on the battery cover assembly.

[0007] In one embodiment, the limiting groove has a first preset height in the longitudinal direction, and the first preset height is smaller than the total height of the pole. After the pole abuts against the bottom surface of the limiting groove, the pole is at least partially located outside the limiting groove, and the sealing rubber ring is sleeved on the pole, and the sealing rubber ring is located outside the limiting groove.

[0008] In one embodiment, a second preset height is formed between the bottom surface of the limiting groove and the end surface of the sealing rubber ring, and the second preset height is greater than the first preset height, so that a buffer gap is formed between the limiting abutment portion and the sealing rubber ring in an un-riveted state.

[0009] In one of the embodiments, the height of the buffer gap is 0.15 mm.

[0010] In one embodiment, the lower mold positioning member includes a lower mold positioning block and a lower mold core, the lower mold positioning block is provided with a mounting hole, the lower mold core is removably inserted into the mounting hole, the top surface of the lower mold core is lower than the top surface of the limiting abutment portion to form the limiting groove, and when the battery cover group is placed in the lower mold cavity, the pole on the battery cover group is located in the limiting groove.

[0011] In one of the embodiments, a first positioning groove is opened on one side wall of the lower mold positioning block, and a first positioning block is arranged on one side of the lower mold positioning block, and the first positioning block is clamped in the first positioning groove to perform positioning operation on the lower mold positioning block.

[0012] In one embodiment, the first positioning groove is in a "V"-shaped structure.

[0013] In one of the embodiments, the lower die assembly includes a chain transfer module, and a plurality of the lower die positioning members are provided on the chain transfer module, and the chain transfer module is used to transfer each of the lower die positioning members to the bottom of the riveting head respectively.

[0014] In one of the embodiments, a pressing ring is further provided on the upper mold frame, one end of the pressing ring is facing the lower mold cavity, the rivet head is penetrated through the pressing ring, and the pressing ring is used to press and fix the battery cover assembly in the lower mold cavity.

[0015] In one of the embodiments, a first limit block and a second limit block are provided on one side surface of the upper mold frame facing the lower mold positioning member, and the first limit block and the second limit block are respectively located on both sides of the bottom surface of the upper mold frame, so that an avoidance cavity is formed between the first limit block and the second limit block, and the lower mold positioning member is located in the avoidance cavity.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The battery cover assembly riveting die of the utility model is provided with an upper die assembly and a lower die assembly, so that the battery cover assembly can be positioned through the lower die cavity in the lower die positioning member to ensure that the riveting head can accurately rivet the pole on the battery cover assembly; at the same time, a limiting abutment portion is provided in the lower die cavity, so that during the riveting operation, the bottom of the periphery of the sealing rubber ring can be limitedly abutted by the limiting abutment portion to avoid the periphery of the sealing rubber ring from warping, thereby improving the appearance quality and sealing performance of the battery cover assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 This is a structural schematic diagram of a riveting die for a battery cover assembly in one embodiment of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the battery cover assembly riveting die at A, which is a partial enlargement;

[0021] Figure 3 for Figure 1 A schematic cross-sectional view of a lower die positioning block of a battery cover assembly riveting die;

[0022] Figure 4 for Figure 1 A schematic diagram of the top view of the lower die positioning block of the battery cover assembly riveting die.

[0023] Figure numbers: 10-battery cover assembly riveting die; 100-upper die assembly; 110-upper die frame; 111-first limit block; 112-second limit block; 113-upper die seat; 114-upper pad; 115-upper clamp; 116-stop plate; 117-upper stripping plate; 120-riveting head; 130-pressing ring; 200-lower die assembly; 210-lower die positioning piece; 211-lower Mould cavity; 211a-avoidance groove; 212-limiting abutment portion; 213-lower mould positioning block; 213a-mounting hole; 213b-first positioning groove; 214-lower mould core; 220-first positioning block; 230-chain transfer module; 240-lower mould frame; 241-lower support plate; 242-lower mould seat; 20-battery cover assembly; 21-pole; 22-sealing rubber ring; 23-cover plate. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0025] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a battery cover assembly riveting die 10 includes: an upper die assembly 100 and a lower die assembly 200, the lower die assembly 200 is located below the upper die assembly 100, the upper die assembly 100 includes an upper die frame 110 and a riveting head 120, the riveting head 120 is penetrated on the upper die frame 110; the lower die assembly 200 includes a lower die positioning member 210, the lower die positioning member 210 is provided with a lower die cavity 211, the lower die cavity 211 is used to position the battery cover assembly 20; a limited abutment portion 212 is provided on the lower die cavity 211, the limited abutment portion 212 is used to abut against the bottom of the sealing rubber ring 22 on the battery cover assembly 20 when the riveting head 120 performs a riveting operation on the pole on the battery cover assembly 20. It should be noted that in the conventional riveting die for the battery cover assembly, the position of the lower mold cavity corresponding to the sealing rubber ring is usually designed to avoid air, that is, the battery cover assembly is placed in the lower mold cavity, and the bottom surface of the pole on the battery cover assembly is abutted against the bottom surface of the lower mold cavity, so that the surrounding of the sealing rubber ring is suspended without limit. During the riveting process, the surrounding of the sealing rubber ring is easily squeezed and warped downward, thereby affecting the appearance quality and sealing performance of the battery cover assembly. Therefore, by providing a limiting abutting portion 212 on the lower mold cavity 211, when the riveting head 120 performs a riveting operation on the pole 21 on the battery cover assembly 20, the limiting abutting portion 212 abuts against the bottom of the sealing rubber ring 22, that is, the limiting abutting portion 212 abuts against the bottom of the surrounding of the sealing rubber ring 22, thereby avoiding the phenomenon of the surrounding of the sealing rubber ring 22 warping downward, thereby improving the appearance quality and sealing performance of the battery cover assembly.

[0026] Specifically, before the riveting operation is performed, the riveting mold is in an open mold state, that is, the riveting head 120 is away from the lower mold positioning member 210. In this way, the battery cover group 20 can be placed in the lower mold cavity 211 on the lower mold positioning member 210, and the battery cover group 20 is positioned through the lower mold cavity 211 to ensure that the pole 21 on the battery cover group 20 can be aligned with the riveting end of the riveting head 120. Then, the upper mold assembly 100 moves toward the direction close to the lower mold assembly 200, and finally enables the riveting head 120 to accurately rivet the pole 21, so that the riveting operation of the battery cover group is realized.

[0027] In one embodiment, the lower mold cavity 211 includes a limiting groove, and the limiting abutting portion 212 is disposed around the limiting groove, and the limiting groove is used to limit the pole 21 on the battery cover assembly 20 .

[0028] It should be noted that the pole 21 is limited by the limiting groove to prevent the pole 21 from being offset during the riveting process, thereby ensuring the riveting quality; at the same time, the limiting abutting portion 212 is arranged around the limiting groove, so that the limiting abutting portion 212 can abut the periphery of the sealing rubber ring 22 to the greatest extent to prevent the periphery of the sealing rubber ring 22 from warping downward. In this embodiment, the lower mold cavity 211 also includes an avoidance groove 211a, which is used to avoid the bending edge on the cover plate 23 to prevent the bending edge from being compressed and deformed.

[0029] Furthermore, the limiting groove has a first preset height in the longitudinal direction, and the first preset height is less than the total height of the pole. After the pole abuts against the bottom surface of the limiting groove, the pole is at least partially located outside the limiting groove, and the sealing rubber ring is sleeved on the pole, and the sealing rubber ring is located outside the limiting groove.

[0030] It should be noted that the first preset height is smaller than the total height of the pole, so that a part of the pole is located outside the limiting groove, then the sealing rubber ring sleeved on the pole can be located outside the limiting groove. In this embodiment, a second preset height is also formed between the bottom surface of the limiting groove and the end surface of the sealing rubber ring, and the second preset height is greater than the first preset height, so that in the non-riveted state, a buffer gap is formed between the limiting abutment portion 212 and the sealing rubber ring; that is, when the riveting operation is not performed, the bottom surface of the sealing rubber ring 22 placed on the lower mold cavity 211 does not contact the top surface of the limiting abutment portion 212, thereby forming a buffer gap. Through the buffer gap, a certain buffer space is given to the sealing rubber ring 22 to avoid damage to the sealing rubber ring 22 due to overpressure, thereby improving the sealing performance and product quality of the battery cover assembly 20. Preferably, the height of the buffer gap is 0.15mm.

[0031] Furthermore, the lower mold positioning member 210 includes a lower mold positioning block 213 and a lower mold core 214. The lower mold positioning block 213 is provided with a mounting hole 213a. The lower mold core 214 is detachably inserted into the mounting hole 213a. The top surface of the lower mold core 214 is lower than the top surface of the limiting abutment portion 212 to form a limiting groove. When the battery cover assembly 20 is placed in the lower mold cavity 211, the pole 21 on the battery cover assembly 20 is located in the limiting groove.

[0032] It should be noted that the lower mold positioning member 210 is designed as a split structure, and the lower mold core 214 is detachably inserted into the mounting hole 213a. In this way, the depth of the limiting groove can be changed by replacing the length of the lower mold core 214. In this way, the riveting depth of the riveting head 120 can be adjusted, and then the overall height of the battery cover group 20 can be adjusted. In addition, the top surface of the lower mold core 214 is abutted against the bottom surface of the pole 21, so that the battery cover group 20 can be riveted at the same height to ensure the stability of the overall height of the battery cover group 20.

[0033] In one embodiment, a first positioning groove 213 b is formed on one side wall of the lower mold positioning block 213 , and a first positioning block 220 is disposed on one side of the lower mold positioning block 213 . The first positioning block 220 is clamped in the first positioning groove 213 b to perform positioning operation on the lower mold positioning block 213 .

[0034] It should be noted that the first positioning block 220 clamps the first positioning groove 213b to perform a positioning operation on the lower mold positioning block 213, thereby ensuring that the riveting head 120 can align with the pole 21 on the battery cover assembly 20, thereby improving the riveting quality of the battery cover assembly 20. In this embodiment, the first positioning groove 213b is a "V"-shaped structure, and correspondingly, the abutting end of the first positioning block 220 is adapted to the structure of the first positioning groove 213b, that is, the first positioning block 220 is also a "V" structure, thereby ensuring the position accuracy of the lower mold positioning block 213. Further, in this embodiment, a second positioning groove is also provided on the other side wall of the lower mold positioning block 213, and the first positioning groove is arranged opposite to the second positioning groove. Correspondingly, the second positioning groove is clamped by the second positioning block to perform a positioning operation on the lower mold positioning block 213, thereby further ensuring the position accuracy of the lower mold positioning block 213 and avoiding the lower mold positioning block 213 from being skewed.

[0035] See also Figure 1 As shown, in one embodiment, the lower die assembly 200 includes a chain transfer module 230 , on which a plurality of lower die positioning members 210 are disposed, and the chain transfer module 230 is used to transfer each lower die positioning member 210 to the bottom of the riveting head 120 .

[0036] It should be noted that a riveting area is formed below the riveting head 120. By setting a chain transfer module 230, the lower mold positioning members 210 on which the battery cover assembly 20 is placed are transferred one by one to the riveting area for riveting operations, thereby improving work efficiency. In the present embodiment, the lower mold assembly 200 also includes a lower mold frame 240, and the chain transfer module 230 is arranged on the lower mold frame 240, and the chain transfer module 230 is located between the upper mold frame 110 and the lower mold frame 240; when the chain transfer module 230 is used to transfer the lower mold positioning member 210, the corresponding first positioning block 220 and the second positioning block can be arranged on the riveting area of ​​the lower mold frame 240, and the first positioning block 220 and the second positioning block are located on both sides of the lower mold positioning member 210. When the chain transfer module 230 transfers the lower mold positioning member 210, the first positioning block 220 and the second positioning block are away from the lower mold positioning member 210 to release the positioning operation on the lower mold positioning member 210; when the lower mold positioning member 210 moves to the riveting area and stops, the first positioning block 220 and the second positioning block move toward the lower mold positioning member 210, at this time, the first positioning block 220 is located in the first positioning groove 213b, and the second positioning block is located in the second positioning groove, thereby realizing the positioning operation on the lower mold positioning member 210; for example, a cylinder can be used to connect the first positioning block 220 and the second positioning block respectively to drive the movement of the first positioning block 220 and the second positioning block.

[0037] See also Figure 1 and Figure 2 As shown, a pressing ring 130 is also provided on the upper mold frame 110 , one end of the pressing ring 130 faces the lower mold cavity 211 , and the rivet head is penetrated through the pressing ring 130 . The pressing ring 130 is used to press and fix the battery cover assembly 20 in the lower mold cavity 211 .

[0038] It should be noted that when performing the riveting operation, the upper mold frame 110 moves toward the direction of the lower mold assembly 200, and the pressing ring 130 first presses the battery cover group 20 in the lower mold cavity 211, thereby positioning the battery cover group 20 to avoid the battery cover group 20 from being tilted during the riveting process; then, the upper mold frame 110 continues to drive the riveting head 120 downward, and finally the riveting head 120 performs a riveting operation on the pole 21 of the battery cover group 20.

[0039] Please participate Figure 1 As shown, in one embodiment, a first limit block 111 and a second limit block 112 are provided on one side surface of the upper mold frame 110 facing the lower mold positioning member 210, and the first limit block 111 and the second limit block 112 are respectively located on both sides of the bottom surface of the upper mold frame 110, so that an avoidance cavity is formed between the first limit block 111 and the second limit block 112, and the lower mold positioning member 210 is located in the avoidance cavity.

[0040] It should be noted that, by setting up the avoidance cavity, it is possible to facilitate the transfer of the lower mold positioning member 210 to the bottom of the riveting head 120 for riveting operations; further, the upper mold frame 110 includes an upper mold base 113, an upper pad 114, an upper clamping plate 115, a stop plate 116 and an upper stripping plate 117 stacked in sequence from top to bottom, and the pressure ring 130 is arranged on the upper stripping plate 117; the lower mold frame 240 includes a lower support plate 241 and a lower mold base 242 stacked in sequence from bottom to top, and the chain transfer module 230 is installed on the lower mold base 242.

[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery cover assembly riveting die, characterized in that: include: An upper die assembly, the upper die assembly comprising an upper die frame and a riveting head, the riveting head being disposed on the upper die frame; and A lower mold assembly, the lower mold assembly is located below the upper mold assembly, the lower mold assembly includes a lower mold positioning member, the lower mold positioning member is provided with a lower mold cavity, and the lower mold cavity is used to position the battery cover assembly; A limited abutment portion is provided on the lower mold cavity, and the limited abutment portion is used to abut against the bottom of the sealing rubber ring on the battery cover assembly when the riveting head performs a riveting operation on the pole on the battery cover assembly.

2. The battery cover assembly riveting die according to claim 1, characterized in that: The lower mold cavity comprises a limiting groove, the limiting abutment portion is arranged around the limiting groove, and the limiting groove is used to limit the pole on the battery cover assembly.

3. The battery cover assembly riveting die according to claim 2, characterized in that: The limiting groove has a first preset height in the longitudinal direction, and the first preset height is less than the total height of the pole. After the pole abuts against the bottom surface of the limiting groove, the pole is at least partially located outside the limiting groove, and the sealing rubber ring is sleeved on the pole, and the sealing rubber ring is located outside the limiting groove.

4. The battery cover assembly riveting die according to claim 3, characterized in that: A second preset height is also formed between the bottom surface of the limiting groove and the end surface of the sealing rubber ring. The second preset height is greater than the first preset height, so that a buffer gap is formed between the limiting abutment portion and the sealing rubber ring in an un-riveted state.

5. The battery cover assembly riveting die according to claim 4, characterized in that: The height of the buffer gap is 0.15 mm.

6. The battery cover assembly riveting die according to claim 5, characterized in that: The lower mold positioning member includes a lower mold positioning block and a lower mold core. The lower mold positioning block is provided with a mounting hole. The lower mold core is detachably inserted into the mounting hole. The top surface of the lower mold core is lower than the top surface of the limiting abutment portion to form the limiting groove. When the battery cover assembly is placed in the lower mold cavity, the pole on the battery cover assembly is located in the limiting groove.

7. The battery cover assembly riveting die according to claim 6, characterized in that: A first positioning groove is provided on one side wall of the lower die positioning block, and a first positioning block is provided on one side of the lower die positioning block. The first positioning block is clamped in the first positioning groove to perform a positioning operation on the lower die positioning block.

8. The battery cover assembly riveting die according to claim 7, characterized in that: The first positioning groove is in a "V" shape.

9. The battery cover assembly riveting die according to any one of claims 1 to 8, characterized in that: The lower die assembly comprises a chain transfer module, on which a plurality of lower die positioning members are arranged, and the chain transfer module is used to transfer each of the lower die positioning members to the bottom of the riveting head respectively.

10. The battery cover assembly riveting die according to any one of claims 1 to 8, characterized in that: A pressing ring is also provided on the upper die frame, one end of which faces the lower die cavity, and the rivet head is passed through the pressing ring. The pressing ring is used to press and fix the battery cover assembly in the lower die cavity.

11. The battery cover assembly riveting die according to any one of claims 1 to 8, characterized in that: A first limit block and a second limit block are arranged on one side surface of the upper mold frame facing the lower mold positioning member, and the first limit block and the second limit block are respectively located on both sides of the bottom surface of the upper mold frame, so that an avoidance cavity is formed between the first limit block and the second limit block, and the lower mold positioning member is located in the avoidance cavity.

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